A quick positioning device for a packaging box

Abstract

The utility model discloses a kind of packaging box quick positioning device, including conveying belt frame body, driving shaft, driven shaft, multiple conveying elastic belt of being sleeved in two shafts and the conveying belt cover plate covered above frame body. Conveying belt cover plate bottom installs blocking cylinder, and its telescopic end is opposite adjacent elastic band gap;Cover plate integrated photoelectric switch and retroreflective plate real-time sensing box body position, trigger cylinder fast stretch from below, vertically push high-speed travel packaging box bottom center, realize instantaneous rigid stop. This scheme completely eliminates side stop risk and top pressure pollution hidden danger, breaks through short box space limit;Utilize elastic band gap natural passage, simultaneously solve the maintenance problem of belt deviation;With guide rail guidance and cylinder high-speed response, significantly improve packaging line efficiency and reliability.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery and equipment technology, specifically to a rapid positioning device for packaging boxes. Background Technology

[0002] On automated packaging production lines, packaging boxes (or similar containers) need to travel at high speed on conveyor belts and be precisely positioned at designated stations to meet the requirements of subsequent labeling, coding, or inspection processes. Existing positioning technologies mainly rely on lateral or top blocking mechanisms, which have significant drawbacks: lateral blocking easily causes packaging boxes to tip over, especially those with unstable centers of gravity; the blocking cylinders often need to extend a long stroke to form a cantilever structure, resulting in insufficient rigidity, unstable operation, and affecting positioning accuracy. Excessive protrusion of the cylinder tail also poses a risk of personnel collision. For shorter packaging boxes, the space on the sides of the conveyor belt is limited, often making it impossible to reserve a reliable position for the blocking cylinder after installing the detection switch. Top blocking is not only complex in mechanism and requires frequent adjustments to accommodate boxes of different heights, but it is also prone to interfering with the contents or labels on the top of the box, and may even lead to the risk of product contamination inside the box. The single-belt conveyor used in existing systems also suffers from belt misalignment, requiring frequent tensioning and correction maintenance, severely hindering operational efficiency. Furthermore, existing solutions generally lack sufficient response speed, and the inertial slippage of the packaging box leads to low positioning accuracy and poor consistency, making it difficult to meet the requirements of high-speed production lines for rapid, repeatable, and high-precision positioning. In summary, current technology urgently needs an innovative solution that overcomes the defects of side-block tipping and instability, adapts to the space limitations of low-profile boxes, avoids top-block contamination and cumbersome adjustments, and achieves rapid, safe, reliable, and accurate positioning. Summary of the Invention

[0003] The purpose of this utility model is to provide a rapid positioning device for packaging boxes. It aims to solve problems in the existing technology such as the risk of side-block tipping, instability of the cylinder cantilever structure, insufficient installation space for short boxes, cumbersome maintenance due to belt misalignment, and poor positioning accuracy. To achieve the above objectives, this utility model provides the following technical solution: The rapid positioning device for packaging boxes includes a conveyor motor (1), a drive shaft (2), a driven shaft (3), a conveyor elastic belt (4), a conveyor belt frame (5), a conveyor belt cover (6), a conveyor shaft fixing seat (7), a reflector (8), a photoelectric switch fixing seat (9), a photoelectric switch (10), a guide rail (11), and a blocking cylinder (12). The conveyor belt frame (5) constitutes the main frame of the device, and the drive shaft (2) and the driven shaft (3) are fixedly installed at both ends through the conveyor shaft fixing seat (7). The conveyor motor (1) is fastened to the side of the conveyor belt frame (5), and its output end is directly connected to the drive shaft (2) to provide conveying power. Multiple parallel elastic belts (4) are arranged (usually ≥3) and fitted into the pre-set annular grooves on the surfaces of the drive shaft (2) and driven shaft (3) to form a conveying plane that does not require adjustment, thus completely eliminating the risk of belt deviation. The conveyor belt cover (6) covers the top of the conveyor belt frame (5) and serves as both a base and a functional integration unit. The photoelectric switch mounting base (9) is installed on the upper surface of the conveyor belt cover (6) to fix the photoelectric switch (10); a reflector (8) is set at the corresponding position opposite it to form a high-response photoelectric sensing area to detect the position of the packaging box in real time (signal delay <10ms). The guide rail (11) is fixed parallel to both sides of the upper surface of the conveyor belt cover (6) to constrain the linear movement path of the packaging box. The blocking cylinder (12) is installed at the bottom of the conveyor belt cover (6), and its telescopic end is precisely aligned with the center of the gap between two adjacent elastic belts (4), with the telescopic direction perpendicular to the conveying plane. A blocking cylinder is installed at the bottom of the conveyor belt cover, and its telescopic end is precisely aligned with the gap between multiple conveyor elastic belts. When the photoelectric switch and reflector sense the packaging box reaching the positioning point, the blocking cylinder extends rapidly from bottom to top, directly acting on the center area of ​​the bottom of the packaging box to form rigid support. The thrust acts vertically on the bottom of the box, eliminating the risk of tipping over; moreover, the cylinder has an extremely short stroke and high rigidity: the cylinder does not require a long-stroke cantilever, ensuring stable and reliable operation; the bottom installation of the blocking cylinder avoids lateral space limitations, and there is no positional conflict between the sensor and the blocking mechanism. Multiple parallel conveyor elastic belts are used, and the positioning is achieved through the slots of the drive shaft and driven shaft, completely eliminating belt deviation. The gaps between the elastic belts become the natural action channel for the blocking cylinder, realizing the structural integration of "conveyance" and "positioning" functions. The position of the box is monitored in real time by the photoelectric switch and reflector integrated on the conveyor belt cover, with a signal response delay of <10ms. The blocking cylinder adopts a short-stroke high-speed model with an action time of ≤0.1 seconds, ensuring immediate stopping under high-speed conveying. The guide rail guides the linear movement of the box, and together with the instantaneous rigid blocking of the cylinder, the positioning error is controlled within ±0.5mm. The conveyor belt cover simultaneously supports the guide rail, sensor components, and blocking cylinder, achieving a high degree of integration of positioning functions.The elastic band can be disassembled and replaced independently, improving maintenance efficiency by more than 70%. Attached Figure Description

[0004] Figure 1 This is a top view diagram based on the present invention; Figure 2 The bottom schematic diagram of this utility model is shown in the figure. The figure includes a conveyor motor (1), a drive shaft (2), a driven shaft (3), a conveyor elastic belt (4), a conveyor belt frame (5), a conveyor belt cover plate (6), a conveyor shaft fixing seat (7), a reflector (8), a photoelectric switch fixing seat (9), a photoelectric switch (10), a guide rail (11), and a blocking cylinder (12). Detailed Implementation

[0005] Combination Figure 1 (Top illustration) and Figure 2(Bottom diagram) This utility model provides a packaging box quick positioning device comprising a conveyor motor (1), a drive shaft (2), a driven shaft (3), a conveyor elastic belt (4), a conveyor belt frame (5), a conveyor belt cover (6), a conveyor shaft fixing seat (7), a reflector (8), a photoelectric switch fixing seat (9), a photoelectric switch (10), a guide rail (11), and a blocking cylinder (12). The conveyor belt frame (5) constitutes the main frame of the device, and the drive shaft (2) and the driven shaft (3) are fixedly installed at both ends through the conveyor shaft fixing seat (7). The conveyor motor (1) is fastened to the side of the conveyor belt frame (5), and its output end is directly connected to the drive shaft (2) to provide conveying power. The conveyor elastic belt (4) is arranged in multiple parallel sections (usually ≥3 sections), which are fitted into the pre-set annular grooves on the surfaces of the drive shaft (2) and the driven shaft (3) to form a conveying plane that does not need to be adjusted, thus completely eliminating the hidden danger of belt deviation. The conveyor belt cover (6) covers the conveyor belt frame (5) and serves as both a base and a functional integration unit. The photoelectric switch mounting base (9) is installed on the upper surface of the conveyor belt cover (6) to fix the photoelectric switch (10); a reflector (8) is set at the corresponding position opposite it to form a high-response photoelectric sensing area to detect the position of the packaging box in real time (signal delay <10ms). The guide rail (11) is fixed parallel to both sides of the upper surface of the conveyor belt cover (6) to constrain the linear movement path of the packaging box. The blocking cylinder (12) is installed at the bottom of the conveyor belt cover (6), and its telescopic end is precisely aligned with the center of the gap between two adjacent elastic belts (4), with the telescopic direction perpendicular to the conveying plane. Positioning Action Flow: The packaging box moves forward at high speed along the guide rail (11) driven by the conveying elastic belt (4); when the front edge of the packaging box blocks the light path between the photoelectric switch (10) and the reflector (8), the photoelectric switch (10) outputs a trigger signal; the control system drives the blocking cylinder (12) to extend from bottom to top within 0.1 seconds, and the cylinder rod rises 3-5mm above the plane of the elastic belt (4), rigidly pushing the bottom center area of ​​the packaging box; the inertial slippage of the packaging box is instantly suppressed, and the positioning accuracy reaches ±0.5mm; the subsequent blocking cylinder (12) repeats this process until the preset number of boxes is reached, the blocking cylinder (12) retracts to below the plane of the elastic belt (4), the packaging box continues to be conveyed, and the device enters the next working cycle. By completely eliminating the risk of side tipping through the bottom vertical pushing method, this solution achieves 0% tipping; at the same time, it avoids the side space conflict in the low box scenario. The elastic belt (4) and the inter-axis slot cooperate to achieve operation without adjustment, and there is no deviation phenomenon in continuous 72-hour testing, reducing the maintenance frequency by 80%. The guide rail (11) guides the directional movement of the box, and the cylinder (12) with a response time of ≤0.1 seconds provides rigid resistance, ensuring that the positioning error is controlled within ±0.5mm even at a high-speed conveying speed of 1.5m / s. All functional components (sensor, guide rail, cylinder) are integrated into the cover plate (6), eliminating the exposed cantilever structure and reducing cylinder vibration amplitude by 90%, significantly improving safety. A single elastic band (4) can be manually removed from the shaft slot, with a replacement time of <2 minutes.

Claims

1. A rapid positioning device for packaging boxes, characterized in that: The device includes a conveyor motor (1), a drive shaft (2), a driven shaft (3), a conveyor elastic belt (4), a conveyor belt frame (5), a conveyor belt cover (6), a conveyor shaft fixing seat (7), a reflector (8), a photoelectric switch fixing seat (9), a photoelectric switch (10), a guide rail (11), and a blocking cylinder (12). The conveyor belt frame (5) forms the main frame of the device. The drive shaft (2) and the driven shaft (3) are fixedly installed at both ends through the conveyor shaft fixing seat (7). The conveyor motor (1) is fastened to the side of the conveyor belt frame (5), and its output end is directly connected to the drive shaft (2) to provide conveying power. The conveyor elastic belt (4) is arranged in multiple parallel sections and is fitted onto the drive shaft (2) and the driven shaft (3). 3) A non-adjustable conveying plane is formed in the pre-set annular groove on the surface. The conveyor belt cover (6) covers the conveyor belt frame (5) and serves as both a base and a functional integration. The photoelectric switch fixing seat (9) is installed on the upper surface of the conveyor belt cover (6) to fix the photoelectric switch (10). A reflector (8) is set at the corresponding position opposite to it to form a high-response photoelectric sensing area to detect the position of the packaging box in real time. The guide rail (11) is fixed parallel to both sides of the upper surface of the conveyor belt cover (6) to constrain the straight movement path of the packaging box. The blocking cylinder (12) is installed at the bottom of the conveyor belt cover (6). Its telescopic end is precisely aligned with the center of the gap between two adjacent elastic bands (4), and the telescopic direction is perpendicular to the conveying plane.

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