A strength detection device for a packaging box

Abstract

The utility model discloses a kind of strength detection devices for packaging box, including workbench, workbench top is provided with mounting bracket, mounting bracket bottom end is fixedly installed with press, the center of workbench is installed with conveyer belt, the both sides of conveyer belt are symmetrically provided with clamping positioning mechanism, clamping positioning mechanism includes moving plate, double-way screw is rotatably installed in moving plate, the both ends of double-way screw are respectively equipped with clamping lever by thread connection, the middle part of double-way screw is fixedly equipped with worm wheel, the output end of driving motor is connected and equipped with the worm of worm wheel transmission connection;The utility model is driven double-way screw by worm and worm, the spacing of clamping lever on both sides can be quickly adjusted by clamping positioning mechanism, adapt to packaging box of different size, significantly improve the versatility of equipment;The inclined plate of clamping lever forms gradual clamping structure, avoid packaging box deformation or damage caused by rigid collision, ensure the stability and positioning alignment accuracy of clamping process.

Description

Technical Field

[0001] This utility model relates to the field of packaging box production technology, specifically to a strength testing device for packaging boxes. Background Technology

[0002] Cardboard boxes are the most widely used packaging product. Depending on the materials used, there are corrugated cardboard boxes, single-layer cardboard boxes, etc., and various specifications and models are available. Three-layer and five-layer cardboard boxes are commonly used, while seven-layer boxes are less common. Each layer consists of linerboard, corrugated paper, core paper, and facing paper. Linerboard and facing paper can be made of kraft paper or corrugated cardboard, while the core paper is made of corrugated paper. The color and feel of each type of paper are different, and the paper produced by different manufacturers also varies in color and feel. During the production and processing of cardboard boxes, strength testing is required to ensure they meet the requirements.

[0003] In the use of existing packaging box strength testing devices, on the one hand, when manually loading the boxes, operators find it difficult to ensure that the boxes are placed at a perfectly vertical angle, which can easily lead to deviations in subsequent testing positions and affect the accuracy of the test results. On the other hand, when the conveyor belt pauses intermittently, the boxes may shift or tilt due to inertia, resulting in uneven stress on the boxes during testing and thus causing misjudgments. In addition, existing equipment mostly uses a fixed-spacing clamping structure, which cannot adapt to packaging boxes of different batches and sizes, requiring frequent adjustments or replacements of clamps, resulting in low efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems and to provide a strength testing device that is easy to adjust the clamping distance and accurately position.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: A strength testing device for packaging boxes includes a workbench, a mounting frame on the top surface of the workbench, a press fixedly mounted on the bottom end of the mounting frame, a conveyor belt mounted at the center of the workbench, clamping and positioning mechanisms symmetrically arranged on both sides of the conveyor belt, the clamping and positioning mechanism including a movable plate, a bidirectional screw rotatably mounted inside the movable plate, clamping rods respectively threaded to both ends of the bidirectional screw, a first guide rod penetrating the clamping rods respectively connected to both ends of the movable plate, a worm gear fixedly mounted in the middle of the bidirectional screw, a drive motor mounted on the top surface of the movable plate, and a worm gear connected to the worm gear transmission at the output end of the drive motor; hydraulic cylinders are mounted on both sides of the mounting frame, and the extension rods of the hydraulic cylinders are respectively connected to the movable plate.

[0006] Furthermore, the clamping rod includes a straight plate connected to both ends of the bidirectional screw by threads, and one end of the straight plate is connected to an inclined plate that is inclined outward at 30°-45°.

[0007] Furthermore, bearings are connected to the bidirectional screws on both sides of the worm gear, and the outer rings of the bearings are fixedly installed inside the movable plate.

[0008] Furthermore, a second guide rod that penetrates the mounting frame is fixedly connected to the side of the movable plate.

[0009] Furthermore, an infrared sensor is installed on the top surface of the workbench on the feeding side.

[0010] Furthermore, a pusher cylinder is provided on the top surface of the workbench on the discharge side, and a pusher plate is connected to one end of the telescopic rod of the pusher cylinder.

[0011] Furthermore, a discharge plate is connected to one end of the workbench on the discharge side.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The design of the worm gear driving the bidirectional screw allows the clamping and positioning mechanism to quickly adjust the distance between the two clamping rods, adapting to packaging boxes of different sizes and significantly improving the versatility of the equipment.

[0013] 2. The inclined plate of the clamping rod forms a progressive clamping structure to avoid deformation or damage to the packaging box caused by rigid collision. At the same time, the guide rods (first guide rod and second guide rod) ensure the stability of the clamping process and the positioning and alignment accuracy, and reduce local stress concentration. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the top surface of the workbench in this utility model; Figure 3 This is a schematic diagram of the clamping and positioning mechanism in this utility model; Figure 4 This is an exploded view of the clamping and positioning mechanism in this utility model; Figure 5 This is a schematic diagram of the packaging box being clamped and positioned by the clamping and positioning mechanism in this utility model.

[0015] In the diagram: 1-Workbench, 2-Mounting platform, 3-Press machine, 4-Conveyor belt, 5-Clamping and positioning mechanism, 6-Hydraulic cylinder, 7-Bearing, 8-Second guide rod, 9-Infrared sensor, 10-Pushing cylinder, 11-Discharge plate, 51-Moving plate, 52-Bidirectional screw, 53-Clamping rod, 54-First guide rod, 55-Worm gear, 56-Drive motor, 57-Worm, 531-Straight plate, 532-Sloping plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Combination Figures 1 to 5 The strength testing device for packaging boxes shown includes a workbench 1, a mounting frame 2 on the top surface of the workbench 1, a press 3 fixedly mounted on the bottom end of the mounting frame 2, a conveyor belt 4 mounted at the center of the workbench 1, and clamping and positioning mechanisms 5 symmetrically arranged on both sides of the conveyor belt 4. The clamping and positioning mechanism 5 includes a movable plate 51, a bidirectional screw 52 rotatably mounted inside the movable plate 51, clamping rods 53 threadedly connected to both ends of the bidirectional screw 52, ​​a first guide rod 54 penetrating the clamping rods 53 connected to both ends of the movable plate 51, a worm gear 55 fixedly mounted in the middle of the bidirectional screw 52, ​​a drive motor 56 mounted on the top surface of the movable plate 51, and a worm 57 connected to the worm gear 55 for transmission at the output end of the drive motor 56; hydraulic cylinders 6 are mounted on both sides of the mounting frame 2, and the telescopic rods of the hydraulic cylinders 6 are connected to the movable plate 51 respectively. This clamping and positioning mechanism 5 can adjust the clamping size for different batches of cartons to position and clamp the packaging boxes. In use, when adjusting the distance between the two clamping rods 53 for the size of the packaging boxes in this batch, the drive motor 56 is started to drive the worm gear 57 to rotate, which in turn drives the worm wheel 55 and the bidirectional screw 52 to rotate, so that the two clamping rods 53 move in opposite directions along the first guide rod 54, thereby adjusting the distance between the two clamping rods 53 to adapt to the size of the packaging boxes in this batch. When inspecting the next batch of packaging boxes of different sizes, the distance between the two clamping rods 53 can be readjusted.

[0019] like Figure 3-5As shown, the clamping rod 53 includes a straight plate 531 connected to both ends of the bidirectional screw 52 by threads. One end of the straight plate 531 is connected to an inclined plate 532 that is tilted outward at 30°-45°. Thus, during the clamping and positioning process of the two clamping and positioning mechanisms 5 clamping the packaging box, the inclined structure of the inclined plate 532 forms an opening similar to a "funnel", which facilitates quick alignment and placement of the packaging box, reduces positioning difficulty, and the inclined design makes the clamping rod and the packaging box gradually fit together in the initial contact, avoiding rigid collision, reducing clamping resistance, and making the process smoother. like Figure 4 As shown, bearings 7 are connected to the bidirectional screws 52 on both sides of the worm gear. The outer ring of the bearings 7 is fixedly installed in the movable plate 51. When the drive motor 56 starts, it will drive the worm 57 to rotate, and the worm 57 will drive the worm wheel 55 to rotate, thereby driving the bidirectional screws 52 to rotate. The two bearings 7 can assist the bidirectional screws 52 to rotate in the movable plate 51. like Figure 1-3 As shown, a second guide rod 8 is fixedly connected to the side of the movable plate 51 through the mounting bracket 2. The second guide rod 8 plays a guiding role when the hydraulic cylinder 6 drives the movable plate 51 to move. like Figure 1 and Figure 5 As shown, an infrared sensor 9 is installed on the top surface of the workbench 1 on the feeding side. The operator places the packaging boxes on the conveyor belt 4 at intervals from the feeding side. After passing the infrared sensor 9, the packaging boxes are transported to the bottom of the press 3 via the conveyor belt 4 after a short time. At this time, the conveyor belt 4 stops running and the hydraulic cylinders 6 on both sides are activated to drive the two clamping and positioning mechanisms 5 to move towards the packaging box. At this time, the inclined rod 532 gradually moves closer, which can evenly apply pressure to the side of the packaging box, reduce local stress concentration, and avoid deformation of the packaging box. Then the bottom of the packaging box is clamped by the clamping rod 53, and the moving plate 51 will abut against the bottom side of the packaging box. In this way, the packaging box is straightened and positioned and clamped, so that the press 3 can accurately detect the pressure strength of the packaging box. like Figure 1-2 As shown, a pusher cylinder 10 is installed on the top surface of the workbench 1 on the discharge side, and a pusher plate is connected to one end of the telescopic rod of the pusher cylinder 10; a discharge plate 11 is connected to one end of the workbench 1 on the discharge side; after the packaging boxes are tested by the press 3, the packaging boxes that meet the strength test will continue to move backward under the conveyor belt 4 and then be discharged through the discharge plate 11; while the packaging boxes that do not meet the strength test will be driven by the conveyor belt 4 for a short time and reach the side of the pusher cylinder 10, at which time the pusher cylinder 10 will be activated, and the non-compliant packaging boxes will be pushed out from the side of the workbench 1 through the pusher plate.

[0020] Working Principle: For the packaging box size tested, the distance between the two clamping rods in the clamping and positioning mechanism is first adjusted to fit the box. Then, the operator places the box on the conveyor belt's feeding side, which transports it to the inspection area. After the infrared sensor detects the box, the conveyor belt pauses briefly, and the box stops at the inspection station below the press. Subsequently, the hydraulic cylinders on both sides drive the moving plate to move towards the box. The inclined plate first contacts the side of the box, using the tilt angle to guide the box to gradually center. The straight plate finally clamps the bottom of the box, and the moving plate also abuts against the side of the box. The second guide rod ensures the moving plate moves linearly, eliminating offset. After positioning and clamping, the press applies vertical pressure to the positioned box to test its compressive strength. The test data is recorded in real time. After the test, the conveyor belt restarts, and qualified products are output via the discharge plate. If the test fails, the pusher cylinder is activated, and the pusher plate pushes the unqualified product out of the worktable, achieving automatic sorting.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A strength testing device for packaging boxes, comprising a workbench (1), a mounting frame (2) provided on the top surface of the workbench (1), a press (3) fixedly mounted on the bottom end of the mounting frame (2), and a conveyor belt (4) installed at the center of the workbench (1), characterized in that: The conveyor belt (4) is symmetrically provided with clamping and positioning mechanisms (5) on both sides. The clamping and positioning mechanism (5) includes a moving plate (51). A bidirectional screw (52) is rotatably installed inside the moving plate (51). The two ends of the bidirectional screw (52) are respectively connected to clamping rods (53) by threads. The two ends of the moving plate (51) are respectively connected to a first guide rod (54) that passes through the clamping rod (53). A worm gear (55) is fixedly provided in the middle part of the bidirectional screw (52). A drive motor (56) is installed on the top surface of the moving plate (51). The output end of the drive motor (56) is connected to a worm gear (57) that is connected to the worm gear (55) for transmission. Hydraulic cylinders (6) are installed on both sides of the mounting frame (2). The telescopic rods of the hydraulic cylinders (6) are respectively connected to the moving plate (51).

2. The strength testing device for packaging boxes according to claim 1, characterized in that: The clamp (53) includes a straight plate (531) that is threaded to both ends of the bidirectional screw (52), and one end of the straight plate (531) is connected to an inclined plate (532) that is inclined outward at 30°-45°.

3. The strength testing device for packaging boxes according to claim 2, characterized in that: Bearings (7) are connected to the bidirectional screws (52) on both sides of the worm gear, and the outer ring of the bearings (7) is fixedly installed inside the movable plate (51).

4. The strength testing device for packaging boxes according to claim 3, characterized in that: The side of the movable plate (51) is fixedly connected to a second guide rod (8) that passes through the mounting frame (2).

5. The strength testing device for packaging boxes according to claim 4, characterized in that: An infrared sensor (9) is installed on the top surface of the workbench (1) on the feeding side.

6. The strength testing device for packaging boxes according to claim 5, characterized in that: A pusher cylinder (10) is provided on the top surface of the workbench (1) on the discharge side, and a pusher plate is connected to one end of the telescopic rod of the pusher cylinder (10).

7. The strength testing device for packaging boxes according to claim 6, characterized in that: A discharge plate (11) is connected to one end of the workbench (1) on the discharge side.

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