A device for grading the compression strength of cartons

Abstract

The utility model discloses a kind of carton compression strength grading detection devices, more specifically to carton packaging detection technical field, including base plate, the bottom rectangular array of base plate is provided with four support legs, the top of base plate is rotatably installed with rotating ring plate, the top annular array of rotating ring plate is provided with several carton positioning mechanisms.The utility model said a kind of carton compression strength grading detection device, by setting rotating ring plate and annular array's carton positioning mechanism, cooperate hydraulic cylinder oil pressure gradually increasing from left to right, can automatically carton is in turn transported to the test station of different pressure levels and carries out continuous grading test, avoid the cumbersome operation of needing manual replacement test equipment or adjusting parameter in traditional mode, realize the automation and standardization of test process, greatly improve the detection efficiency, while ensuring the consistency and reliability of test result.

Description

Technical Field

[0001] This utility model relates to the field of cardboard packaging testing technology, and in particular to a cardboard box compression strength grading testing device. Background Technology

[0002] As a widely used packaging container, the compressive strength of cardboard boxes is a key performance indicator for evaluating their ability to withstand pressure during stacking, transportation, and warehousing, and to protect the contents. Therefore, accurate and comprehensive compressive strength testing of cardboard boxes is essential. However, existing technologies have the following problems:

[0003] In existing technologies, the compression strength testing of cartons mostly uses a single pressure source or requires manual adjustment of test parameters, which cannot achieve continuous, multi-level automated grading testing. After each test, the cartons need to be replaced manually or the pressure needs to be reset, resulting in long testing cycles, low efficiency, and the accuracy of test results is easily affected by human error, making it difficult to meet the actual needs of rapid grading of carton quality in large-scale production;

[0004] Meanwhile, traditional testing devices often employ fixed clamping structures, which are difficult to adapt to the positioning requirements of cartons of different sizes. This can easily lead to cartons shifting or tipping over during testing, affecting the reliability of the test data. Furthermore, the waste cartons after testing require manual removal and cleanup, increasing the workload for operators, creating a chaotic working environment, and reducing the equipment's practicality and user experience. Utility Model Content

[0005] The main purpose of this invention is to provide a cardboard box compression strength grading and testing device, which can effectively solve the problems of low testing efficiency, inability to automatically perform grading tests, poor adaptability of cardboard box positioning, and inconvenience of waste disposal in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A cardboard box compression strength grading and testing device includes a base plate. Four supporting legs are arranged in a rectangular array at the bottom of the base plate. A rotating annular plate is rotatably mounted on the top of the base plate. Several cardboard box positioning mechanisms are arranged in a circular array on the top of the rotating annular plate. Pressure testing mechanisms are arranged on the left, rear, and right sides of the rotating annular plate. A recycling mechanism is located at the center of the bottom of the base plate. A servo motor is fixedly mounted at an eccentric position at the bottom of the base plate. The output shaft of the servo motor passes through the top of the base plate and is fixedly mounted with a driving gear. A driven external gear ring is fixedly mounted on the outer wall of the rotating annular plate. The driving gear meshes with the driven external gear ring. A waste hole is provided at the center of the base plate, which is vertically aligned with the inner ring of the rotating annular plate. The carton positioning mechanism includes a placement plate. A limiting strip is fixedly installed on the top side of the placement plate away from the waste hole. Side plates are fixedly installed on both sides of the top of the placement plate at a perpendicular angle to the limiting strip. Springs are fixedly installed on the opposite surfaces of the two side plates. Guide plates are fixedly installed on the opposite surfaces of the two springs. Sliding rods located inside the springs are fixedly installed on the opposite back surfaces of the two guide plates. The two sliding rods are slidably connected to the two side plates respectively.

[0008] Preferably, both guide plates consist of a bottom vertical plate and a top inclined plate, with the bottom of the vertical plate fitting against the top of the placement plate, and the two inclined plates combined to form a V-shape.

[0009] Preferably, each of the pressure testing mechanisms includes an L-shaped support plate vertically mounted on the top of the base plate. An infrared receiver is fixedly mounted on the side of the three L-shaped support plates that is vertically close to the carton positioning mechanism. An infrared transmitter is fixedly mounted on the side of the several placement plates that is away from the waste hole. The several infrared transmitters are all on the same horizontal line as the infrared receivers.

[0010] Preferably, hydraulic cylinders are fixedly installed at the top of the horizontal position of each of the three L-shaped support plates, and the oil pressure of the three hydraulic cylinders gradually increases from left to right, for graded testing of the compressive strength of the carton.

[0011] Preferably, the output end of the hydraulic cylinder extends to the bottom of the horizontal position of the L-shaped support plate and is fixedly installed with a carton pressing plate. A limiting slide rod is fixedly installed on the top of the carton pressing plate. The limiting slide rod is slidably connected to the horizontal position of the L-shaped support plate. The carton pressing plate is located directly above the placement plate, and its bottom surface area is greater than the top surface area of ​​the largest carton that the placement plate can hold.

[0012] Preferably, the bottom of the carton pressing plate is provided with a sliding groove, and an electric push rod is fixedly installed on the side of the carton pressing plate away from the L-shaped support plate. The output end of the electric push rod passes through the inner cavity of the sliding groove and is fixedly installed with a carton push plate. The carton push plate is located above the limiting strip and is placed to press the carton. The carton push plate slides within the inner cavity of the sliding groove.

[0013] Preferably, the three L-shaped support plates have vertically extending measuring grooves on the side near the waste hole at the horizontal position. A laser rangefinder is fixedly installed inside the measuring groove. The laser probe of the laser rangefinder is located above the cardboard pressing plate and is used to detect the descent distance of the cardboard pressing plate. When the cardboard fails to withstand the pressure, the height of the cardboard pressing plate will drop more. The signal output terminals of the three laser rangefinders are electrically connected to the signal input terminals of the three electric push rods, respectively, to activate the electric push rods when the cardboard is detected to be crushed.

[0014] Preferably, the recycling mechanism includes a protective hanging plate, which is fixedly installed at the bottom of the base plate. An inclined plate is fixedly installed at the bottom of the recycling mechanism, and side guard plates are fixedly installed on both sides of the inclined plate. The inclined plate is located directly below the waste hole and is used to catch the falling cardboard boxes.

[0015] Preferably, a drawer slide is provided on the side of the top of the inclined plate away from the waste hole, and a cardboard box recycling drawer is slidably engaged on the inner side of the drawer slide, and a lifting handle for lifting the cardboard box recycling drawer is fixedly installed on both sides.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model provides a carton compression strength grading and testing device. By setting a rotating annular plate and a carton positioning mechanism with an annular array, and with the hydraulic cylinder oil pressure gradually increasing from left to right, the carton can be automatically transported to the testing station of different pressure levels for continuous grading testing. This avoids the cumbersome operation of manually changing testing equipment or adjusting parameters in the traditional method, realizes the automation and standardization of the testing process, greatly improves the testing efficiency, and ensures the consistency and reliability of the test results.

[0018] 2. This utility model provides a cardboard box compression strength grading and testing device. The cardboard box positioning mechanism adopts a combination structure of spring guide plate and slide bar, which can adaptively clamp cardboard boxes of different sizes to ensure the stability of the cardboard box position during the test. At the same time, the descent distance of the cardboard box pressing plate is monitored in real time by a laser rangefinder. When the cardboard box is detected to be crushed, an electric push rod is automatically triggered to push the waste cardboard box into the recycling mechanism, realizing the automatic collection and cleaning of waste materials. This not only enhances the adaptability of the device to cardboard boxes of various specifications, but also reduces manual intervention, reduces labor intensity, and improves the convenience and hygiene of the overall operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the base plate of this utility model;

[0021] Figure 3 This is a schematic diagram of the carton positioning mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the pressure testing mechanism of this utility model;

[0023] Figure 5 This is a bottom view of the cardboard box pressing plate of this utility model;

[0024] Figure 6 This is a schematic diagram of the recycling mechanism of this utility model.

[0025] In the diagram: 1. Base plate; 11. Support leg; 12. Servo motor; 13. Drive gear; 14. Waste hole; 2. Rotating ring plate; 21. Driven external gear ring; 3. Carton positioning mechanism; 31. Placement plate; 32. Limiting bar; 33. Side plate; 34. Spring; 35. Guide plate; 36. Slide rod; 37. Infrared transmitter; 4. Pressure testing mechanism; 41. L-shaped bracket plate; 42. Hydraulic cylinder; 43. Distance measuring groove; 44. Laser rangefinder; 45. Carton pressing plate; 451. Slide groove; 452. Electric push rod; 453. Carton push plate; 46. Limiting slide rod; 47. Infrared receiver; 5. Recycling mechanism; 51. Protective hanging plate; 52. Inclined plate; 53. Side guard plate; 54. Drawer slide groove; 55. Carton recycling drawer; 56. Lifting handle. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 , Figure 2As shown, a cardboard box compression strength grading and testing device includes a base plate 1. Four supporting legs 11 are arranged in a rectangular array at the bottom of the base plate 1 to stably support the entire device. A rotating annular plate 2 is rotatably mounted on the top of the base plate 1 via bearings or similar rotating components. Several cardboard box positioning mechanisms 3 are arranged in a circular array at the top of the rotating annular plate 2 to fix the cardboard boxes to be tested. Pressure testing mechanisms 4 are arranged on the left, rear, and right sides of the rotating annular plate 2 for grading and compressive strength testing of the cardboard boxes. A recycling mechanism 5 is arranged at the bottom center of the base plate 1 for collecting... After testing, a servo motor 12 is fixedly installed at the bottom eccentric part of the base plate 1 with bolts. The output shaft of the servo motor 12 passes through the sealed bearing to the top of the base plate 1 and is fixedly installed with a drive gear 13. A driven external gear ring 21 is fixedly installed on the outer wall of the rotating ring plate 2. The drive gear 13 meshes with the driven external gear ring 21. The servo motor 12 drives the drive gear 13 to rotate, thereby driving the rotating ring plate 2 to rotate. A waste hole 14 is opened at the center of the base plate 1, which is aligned vertically with the inner ring of the rotating ring plate 2, for the carton to fall after testing.

[0028] like Figure 3 , Figure 4 , Figure 5 As shown, the carton positioning mechanism 3 includes a placement plate 31, which is fixedly installed on the top of the rotating annular plate 2 by bolts. A limiting strip 32 is fixedly installed on the side of the top of the placement plate 31 away from the waste hole 14 to limit the initial position of the carton. Side plates 33 are fixedly installed on both sides of the top of the placement plate 31 and the limiting strip 32 at a vertical angle. Springs 34 are fixedly installed on the opposite sides of the two side plates 33 by welding or bolts. Guide plates 35 are fixedly installed on the opposite sides of the two springs 34. Sliding rods 36 located inside the springs 34 are fixedly installed on the opposite back sides of the two guide plates 35. The two sliding rods 36 are slidably connected to the sliding holes opened on the two side plates 33 respectively. The guide plate 35 consists of a vertical plate at the bottom and an inclined plate at the top of the vertical plate. The bottom of the vertical plate is in contact with the top of the placement plate 31. The two inclined plates can be combined to form a V-shape, which facilitates the guidance of the carton and the use of the elastic force of the spring 34 to adaptively clamp the carton of different sizes.

[0029] Each pressure testing mechanism 4 includes an L-shaped support plate 41 bolted vertically to the top of the base plate 1. Infrared receivers 47 are fixedly installed on the side of each of the three L-shaped support plates 41 closest to the carton positioning mechanism 3. Infrared emitters 37 are fixedly installed on the side of each of the placement plates 31 furthest from the waste hole 14. The infrared emitters 37 and infrared receivers 47 are on the same horizontal line, used to detect whether the carton is in position and trigger the test process. Hydraulic cylinders 42 are bolted to the top of each of the three L-shaped support plates 41 at their horizontal positions, with the rated oil pressure of the three hydraulic cylinders 42 gradually increasing from left to right (e.g., the left hydraulic cylinder has the lowest pressure, and the right one has the highest), used to achieve graded testing of the carton's compressive strength. The output end of the hydraulic cylinder 42 extends through a coupling to the bottom of the horizontal position of the L-shaped support plate 41 and is fixed. A carton pressing plate 45 is installed, and a limiting slide rod 46 is fixedly installed on the top of the carton pressing plate 45. The limiting slide rod 46 is slidably connected to the sliding hole opened at the horizontal position of the L-shaped support plate 41 to ensure the stability of the pressing process. The carton pressing plate 45 is located directly above the placement plate 31, and the bottom surface area is larger than the top surface area of ​​the largest carton size that the placement plate 31 can hold, to ensure full pressing. A sliding groove 451 is opened at the bottom of the carton pressing plate 45. An electric push rod 452 is fixedly installed on the side of the carton pressing plate 45 away from the L-shaped support plate 41. The output end of the electric push rod 452 passes through the inner cavity of the sliding groove 451 and is fixedly installed with a carton push plate 453. The carton push plate 453 is located above the limiting strip 32 and is used to push the carton after testing. The carton push plate 453 slides within the inner cavity of the sliding groove 451.

[0030] Three L-shaped support plates 41 have vertically connected measuring grooves 43 on the side near the waste hole 14 at the horizontal position. A laser rangefinder 44 is fixedly installed on the inner side of the measuring groove 43 by a bracket. The laser probe of the laser rangefinder 44 is located above the carton pressing plate 45 and is used to detect the descent distance of the carton pressing plate 45. When the carton fails to withstand the pressure, the height of the carton pressing plate 45 will drop more. The laser rangefinder 44 detects this change. The signal output terminals of the three laser rangefinders 44 are electrically connected to the signal input terminals of the three electric push rods 452 through wires or wireless modules, which are used to automatically start the electric push rods 452 when the carton is detected to be crushed.

[0031] Specifically, the laser rangefinder 44 has a preset descent distance threshold. When the descent distance of the carton pressing plate 45 exceeds the threshold, it is determined that the carton has been crushed. At this time, the laser rangefinder 44 sends a signal to the electric push rod 452, which then starts to push the carton push plate 453 to push the carton into the waste hole 14.

[0032] like Figure 6As shown, the recycling mechanism 5 includes a protective hanging plate 51, which is fixedly installed on the bottom of the base plate 1 by welding or bolts. An inclined plate 52 is fixedly installed on the bottom of the recycling mechanism 5. Side guard plates 53 are fixedly installed on both sides of the inclined plate 52. The inclined plate 52 is located directly below the waste hole 14 and is used to catch the falling cardboard boxes. A drawer slide 54 is opened on the top side of the inclined plate 52 away from the waste hole 14. A cardboard box recycling drawer 55 is slidably engaged on the inner side of the drawer slide 54. A lifting handle 56 is fixedly installed on both sides of the cardboard box recycling drawer 55 to facilitate the removal of the recycled cardboard boxes.

[0033] The signal transmission methods in this case are all controlled by PLC or microcontroller, which are existing technical fields and will not be elaborated on here.

[0034] The working principle of this cardboard box compressive strength grading and testing device will be explained in detail below.

[0035] like Figure 1-6 As shown, firstly, the carton to be tested is placed on the placement plate 31 of the carton positioning mechanism 3, with one end of the carton close to the limiting strip 32. During placement, both sides of the carton will contact the inclined plate of the guide plate 35. Under the action of the spring 34, the guide plate 35 adaptively clamps the carton to ensure that the carton is centered and fixed. Subsequently, the servo motor 12 is started, and through the meshing of the drive gear 13 and the driven external gear ring 21, it drives the rotating ring plate 2 to rotate, rotating the carton positioning mechanism 3 with the carton fixed to it below the first pressure testing mechanism 4. When the infrared transmitter 37 on the carton positioning mechanism 3 is aligned with the infrared receiver 47 on the L-shaped bracket plate 41, the infrared signal is received, indicating that the carton is in place. The first hydraulic cylinder 42 is started, driving the carton pressing plate 45 to move downward and apply pressure to the carton. The laser rangefinder 44 monitors the descent distance of the carton pressing plate 45 in real time. If the cardboard box is not crushed under pressure, the cardboard box pressing plate 45 descends a small distance; if the cardboard box is crushed, the descent distance of the cardboard box pressing plate 45 increases. After the laser rangefinder 44 detects this change, it sends a signal to the electric push rod 452. The electric push rod 452 starts and pushes the cardboard box push plate 453 to push the crushed cardboard box into the waste hole 14. The cardboard box falls through the waste hole 14 onto the inclined plate 52 of the recycling mechanism 5 and slides into the cardboard box recycling drawer 55 for centralized collection. If the cardboard box passes the first pressure test, the rotating ring plate 2 continues to rotate, sending the cardboard box to the second or third pressure test mechanism 4 for a higher pressure grading test. The process is similar. After the test, the operator can pull out the cardboard box recycling drawer 55 through the lifting handle 56 to clean up the waste. The entire device realizes automatic positioning of cardboard boxes, grading pressure testing, and waste recycling, improving detection efficiency and accuracy.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cardboard box compressive strength grading and testing device, comprising a base plate (1), characterized in that: The base plate (1) has four supporting legs (11) arranged in a rectangular array at its bottom. A rotating annular plate (2) is rotatably mounted on the top of the base plate (1). Several carton positioning mechanisms (3) are arranged in an annular array on the top of the rotating annular plate (2). Pressure testing mechanisms (4) are arranged on the left, rear, and right sides of the rotating annular plate (2). A recycling mechanism (5) is arranged at the bottom center of the base plate (1). A servo motor (12) is fixedly mounted at the bottom eccentricity of the base plate (1). The output shaft of the servo motor (12) extends through to the top of the base plate (1) and is fixedly mounted with a drive gear (13). A driven external gear ring (21) is fixedly mounted on the outer wall of the rotating annular plate (2). The drive gear (13) meshes with the driven external gear ring (21). The base plate (1) has a waste hole (14) at its center that is aligned vertically with the inner ring of the rotating ring plate (2). The carton positioning mechanism (3) includes a placement plate (31). A limiting strip (32) is fixedly installed on the side of the top of the placement plate (31) away from the waste hole (14). Side plates (33) are fixedly installed on both sides of the top of the placement plate (31) that are perpendicular to the limiting strip (32). Springs (34) are fixedly installed on the opposite sides of the two side plates (33). Guide plates (35) are fixedly installed on the opposite sides of the two springs (34). Slide rods (36) located inside the springs (34) are fixedly installed on the opposite sides of the two guide plates (35). The two slide rods (36) are slidably connected to the two side plates (33) respectively.

2. The cardboard box compression strength grading and testing device according to claim 1, characterized in that: Both guide plates (35) consist of a bottom vertical plate and a top inclined plate, with the bottom of the vertical plate fitting against the top of the placement plate (31), and the two inclined plates can be combined to form a V-shape.

3. The cardboard box compression strength grading and testing device according to claim 1, characterized in that: Each of the pressure testing mechanisms (4) includes an L-shaped support plate (41) mounted vertically on the top of the base plate (1). An infrared receiver (47) is fixedly installed on the side of the three L-shaped support plates (41) that is close to the carton positioning mechanism (3). An infrared transmitter (37) is fixedly installed on the side of the several placement plates (31) that is away from the waste hole (14). The several infrared transmitters (37) are all on the same horizontal line as the infrared receivers (47).

4. The cardboard box compression strength grading and testing device according to claim 3, characterized in that: Hydraulic cylinders (42) are fixedly installed at the top of the three L-shaped support plates (41) at the horizontal position, and the oil pressure of the three hydraulic cylinders (42) gradually increases from left to right, which is used to grade and test the compressive strength of the carton.

5. The cardboard box compression strength grading and testing device according to claim 4, characterized in that: The output end of the hydraulic cylinder (42) extends to the bottom of the horizontal position of the L-shaped support plate (41) and is fixedly installed with a carton pressing plate (45). A limiting slide rod (46) is fixedly installed on the top of the carton pressing plate (45). The limiting slide rod (46) is slidably connected to the horizontal position of the L-shaped support plate (41). The carton pressing plate (45) is located directly above the placement plate (31), and its bottom surface area is greater than the top surface area of ​​the largest carton that the placement plate (31) can hold.

6. The cardboard box compression strength grading and testing device according to claim 5, characterized in that: The bottom of the carton pressing plate (45) is provided with a sliding groove (451). An electric push rod (452) is fixedly installed on the side of the carton pressing plate (45) away from the L-shaped support plate (41). The output end of the electric push rod (452) passes through the inner cavity of the sliding groove (451) and is fixedly installed with a carton push plate (453). The carton push plate (453) is located above the limiting strip (32) to prevent pressing the carton. The carton push plate (453) slides within the inner cavity of the sliding groove (451).

7. The cardboard box compression strength grading and testing device according to claim 6, characterized in that: The three L-shaped support plates (41) have a vertically extending measuring groove (43) on one side near the waste hole (14) at the horizontal position. A laser rangefinder (44) is fixedly installed on the inner side of the measuring groove (43). The laser probe of the laser rangefinder (44) is located above the carton pressing plate (45) and is used to detect the descent distance of the carton pressing plate (45). When the carton fails to withstand the pressure, the height of the carton pressing plate (45) will drop more. The signal output terminals of the three laser rangefinders (44) are electrically connected to the signal input terminals of the three electric push rods (452) respectively, and are used to activate the electric push rods (452) when the carton is detected to be crushed.

8. The cardboard box compression strength grading and testing device according to claim 1, characterized in that: The recycling mechanism (5) includes a protective hanging plate (51), which is fixedly installed at the bottom of the base plate (1). An inclined plate (52) is fixedly installed at the bottom of the recycling mechanism (5). Side guard plates (53) are fixedly installed on both sides of the inclined plate (52). The inclined plate (52) is located directly below the waste hole (14) and is used to catch the falling cardboard boxes.

9. The cardboard box compression strength grading and testing device according to claim 8, characterized in that: A drawer slide (54) is provided on the side of the top of the inclined plate (52) away from the waste hole (14). A cardboard recycling drawer (55) is slidably engaged on the inner side of the drawer slide (54), and a lifting handle (56) for lifting the cardboard recycling drawer (55) is fixedly installed on both sides.

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