A corrugated cardboard box strength testing device and method

Abstract

The present invention discloses a corrugated cardboard box strength testing device and method, which includes a testing platform for placing a corrugated cardboard box. A base is provided at the bottom of the testing platform, and a control panel is installed on one side of the base. A bracket is installed above the testing platform, and a cylinder is installed on the top plate of the bracket. A support rod is arranged below the top plate. A guide sleeve is fixedly arranged on the support rod, and a guide rod is movably arranged inside the guide sleeve. A steering wheel is fixedly arranged at the top of the guide rod, the top of the steering wheel abuts against the output end of the cylinder, and the bottom of the guide rod is fixedly connected to a pressing cover mechanism; this device can quickly switch and adjust to detect corrugated cardboard boxes of multiple sizes without adjusting the surrounding limit plates; the limit plates avoid generating additional binding forces on the corrugated cardboard boxes and will not interfere with the natural deformation process of the corrugated cardboard boxes, and the inspection error is small.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly relates to a corrugated cardboard box strength testing device and method. Background Art

[0002] Due to its good buffering performance, high compressive strength, economy and environmental protection, corrugated cardboard boxes have been widely used in the packaging and transportation fields of various products. As one of the most important transportation packaging materials, the annual output of corrugated cardboard boxes has reached tens of billions of square meters, occupying more than 80% of the packaging market share in the fields of electronic products, household appliances, food, medicine, etc. The corrugated cardboard box provides excellent compressive strength and buffering protection ability through its multi-layer corrugated structure, and at the same time has significant advantages such as light weight, low cost, and recyclability. In practical applications, its strength performance is directly related to the safety of goods during transportation. Especially in the context of the rapid development of modern logistics industry, goods often suffer complex external forces during transportation, warehousing and loading / unloading processes, which puts higher requirements on the compressive strength of corrugated cardboard boxes. According to the regulations of the International Organization for Standardization (ISO) and national packaging standards, corrugated cardboard boxes must have sufficient compressive strength to ensure the safety of the contents. Therefore, it is of great practical significance to conduct standardized and normalized strength tests on corrugated cardboard boxes.

[0003] Chinese patent document (Publication No.: CN112378771A) discloses a corrugated cardboard box load-bearing detection device, which includes an upper pressing drive hydraulic mechanism and a bearing clamping control mechanism. The bottom end of the upper pressing drive hydraulic mechanism is movably connected to the bearing clamping control mechanism. This device can drive the movable clamping plate to slide backward on the guide rail by using the fixed part connected to the inner side of the telescopic piston push rod, and the main movable rotating rod and the auxiliary movable rotating rod respectively connected to the movable clamping plate and the fixed part synchronously drive the pressing plate body to descend, and use the pressure detection plate to press and detect the load-bearing of the corrugated cardboard box, and transmit the detection data to the display screen in real time. When detecting cartons of different categories and load-bearing strengths, it can also first pull up the plate body and place the counterweight on the weighing sensor to measure its mass, and then conduct load-bearing detection on the lower carton together with the pressing plate body, avoiding the pressing force of the pressing plate body not reaching the load-bearing extreme value of some cartons, improving the applicable range of the device, and being more accurate compared with manual detection.

[0004] During the process of transporting goods, the corrugated cardboard box will be vibrated during transportation, and the corrugated cardboard boxes are mostly stacked, so the corrugated cardboard box will bear the lateral stress generated by vibration and the compression deformation in the vertical direction;

[0005] When performing load-bearing tests on corrugated cardboard boxes and testing multiple sizes, it is necessary to frequently adjust the position of the surrounding limit plates, resulting in low work efficiency and being unfavorable for large-scale cardboard box testing. The top plate used to fix the corrugated cardboard box is too large, wasting materials and easily causing bumps, which is not conducive to operation and affects efficiency. When testing, the large limit plates around the corrugated cardboard box will block the line of sight, and the large limit plates will also interfere with the natural deformation process of the corrugated cardboard box.

[0006] It will generate additional binding forces on the corrugated cardboard box, making it difficult to truly reflect the process of the corrugated cardboard box under transverse stress and vertical compression deformation, resulting in large testing errors. Summary of the Invention

[0007] Aiming at the deficiencies of the existing technology, the present invention provides a strength testing device and method for corrugated cardboard boxes, which can quickly switch and adjust the detection of corrugated cardboard boxes of multiple sizes without adjusting the surrounding limit plates, with high work efficiency; the contact area of the limit plates is small, avoiding generating additional binding forces on the corrugated cardboard boxes, not interfering with the natural deformation process of the corrugated cardboard boxes, and having small inspection errors.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A strength testing device for corrugated cardboard boxes includes a test bench for placing corrugated cardboard boxes. A base is provided at the bottom of the test bench, and a control panel is installed on one side of the base. A bracket is installed above the test bench, and a cylinder is installed on the top plate of the bracket. A support rod is provided below the top plate, and a guide sleeve is fixedly provided on the support rod. A guide rod is movably arranged inside the guide sleeve. A steering wheel is fixedly provided at the top of the guide rod, and the top of the steering wheel abuts against the output end of the cylinder. The bottom of the guide rod is fixedly connected to a pressing cover mechanism; the pressing cover mechanism includes a first pressing cover assembly, a second pressing cover assembly, and a third pressing cover assembly. The third pressing cover assembly is connected to the bottom of the support rod through a suspension rod. The second pressing cover assembly is sleeved inside the third pressing cover assembly, and the first pressing cover assembly is sleeved inside the second pressing cover assembly; the guide rod movably penetrates through the second pressing cover assembly and the third pressing cover assembly, and the bottom of the guide rod is fixedly connected to the first pressing cover assembly; under normal conditions, the first pressing cover assembly, the second pressing cover assembly, and the third pressing cover assembly are all in a mutually sleeved state to form a pressing cover body; when the guide rod is rotated to one side, the first pressing cover assembly disengages from the pressing cover body and moves downward, or when the guide rod is rotated to the other side, the second pressing cover assembly disengages from the pressing cover body and moves downward, or after lifting the guide rod and then lowering it, the entire pressing cover body moves downward, and all move to the top of the corrugated cardboard box.

[0010] Preferably, the third pressing cover assembly is a frame structure. Third pressing cover fixing grooves are arrayed on the inner walls of the frame, and third pressing cover limit plates are arrayed at the bottom end of the frame.

[0011] Preferably, the first gland assembly includes a first gland body with a cavity structure, a first gland convex disk rotatably installed inside the first gland body, the bottom of a guide rod fixedly connected to the top end of the first gland convex disk, first gland connecting plates slidably arranged around the first gland convex disk, the first gland connecting plates limited by chutes, and first gland tension springs arranged on one side of the first gland connecting plates close to the first gland convex disk; several first gland limiting units are arranged on the outer periphery of the first gland body.

[0012] Preferably, the first gland limiting unit includes a first gland limiting plate and a first gland T-shaped groove. The first gland T-shaped groove is located on one side of the first gland body. The T-shaped part of the first gland limiting plate is connected to the bottom of the first gland T-shaped groove through a first gland limiting tension spring. The limiting part of the first gland limiting plate slides up and down on the outside of the first gland body, and a first gland reset part is arranged on one side of the first gland T-shaped groove.

[0013] Preferably, the first gland reset part includes a first gland wedge plate. A first gland reset groove and a first gland clamping plate groove are formed on one side of the first gland T-shaped groove. The first gland reset groove communicates with the first gland T-shaped groove. The first gland wedge plate is installed inside the first gland reset groove. The first gland wedge plate is fixedly provided with a first gland baffle. A first gland spring is sleeved on the first gland wedge plate. The other end of the first gland wedge plate is hinged with a first gland clamping plate. When the first gland clamping plate is in a horizontal position, it supports the first gland limiting plate. When the first gland clamping plate is in a vertical state, it is located in the clamping plate groove, which is beneficial for the upward reset of the first gland limiting plate.

[0014] Preferably, the second gland assembly includes a second gland body with a cavity structure, a second gland convex disk rotatably installed inside the second gland body, second gland connecting plates slidably arranged around the second gland convex disk, the second gland connecting plates limited by chutes, and second gland tension springs arranged on one side of the second gland connecting plates close to the second gland convex disk; several second gland limiting units are arranged on the outer periphery of the second gland body; a through hole is formed in the middle of the second gland body, a column body is installed in the through hole, the top of the column body is fixedly connected to the bottom end of the second gland convex disk to form a rotating body; a groove is formed at the bottom of the column body, and the first gland assembly is installed in the groove. The guide rod passes through the rotating body and is fixedly connected to the first gland convex disk of the first gland assembly; an arc-shaped groove is formed on the rotating body, and a vertical plate is fixedly arranged on the guide rod, and the vertical plate is located inside the arc-shaped groove.

[0015] Preferably, the second gland limiting unit includes a second gland limiting plate and a second gland T-shaped groove. The second gland T-shaped groove is located on one side of the second gland body. The T-shaped part of the second gland limiting plate is connected to the bottom of the second gland T-shaped groove through a second gland limiting tension spring. The limiting part of the second gland limiting plate slides up and down on the outside of the second gland body. A second gland reset member is arranged on one side of the second gland T-shaped groove. The second gland reset member includes a second gland wedge plate. A second gland reset groove and a second gland clamping plate groove are formed on one side of the second gland T-shaped groove. The second gland reset groove is communicated with the second gland T-shaped groove. The second gland wedge plate is installed inside the second gland reset groove. A second gland baffle is fixedly arranged on the second gland wedge plate. A second gland spring is sleeved on the second gland wedge plate. The other end of the second gland wedge plate is hinged with a second gland clamping plate. When the second gland clamping plate is in a horizontal position, it supports the second gland limiting plate. When the second gland clamping plate is in a vertical state, it is located in the clamping plate groove, which is beneficial to the upward reset of the second gland limiting plate.

[0016] Preferably, the suspension rod includes a sleeve and a sleeve rod. The end of the sleeve rod is fixedly connected to a guide rod. A conical platform is fixedly arranged at the top of the guide rod. An inverted conical platform is slidably sleeved on the guide rod. A through hole is formed in the sleeve. The through holes are located on the opposite side walls of the sleeve. Wedge blocks are slidably installed in the through holes on both sides. A connecting rod is fixedly arranged at the end of the wedge block close to the outside. A compression spring is sleeved on the connecting rod.

[0017] Preferably, a pressure sensor is arranged at the output end of the cylinder for real-time monitoring of the pressure value. A displacement sensor is arranged on the support rod for detecting the displacement of the gland mechanism. Both the pressure sensor and the displacement sensor are electrically connected to the control panel.

[0018] The method for testing by using the device includes the following steps:

[0019] S1. Place the corrugated cardboard box to be tested on the test bench and accurately position it according to the box size by selecting the corresponding marking line.

[0020] S2. Select a gland assembly with a suitable size for the gland mechanism, specifically including:

[0021] S21. Rotate the steering wheel to one side to make the guide rod rotate by 45 degrees. The first gland assembly disengages from the gland body and moves down to the top of the corrugated cardboard box. The first gland limiting plate is close to the side wall of the cardboard box to achieve limiting and fixing.

[0022] S22. Rotate the steering wheel to the other side to make the guide rod rotate by 45 degrees. The second gland assembly disengages from the gland body and moves down to the top of the corrugated cardboard box. The second gland limiting plate is close to the side wall of the cardboard box to achieve limiting and fixing.

[0023] S23. Lift the guide rod upward to trigger the latching unit of the suspension rod, causing the entire gland body to move downward to the top of the corrugated cardboard box, and the third gland limiting plate to be close to the side wall of the cardboard box to achieve limiting and fixing;

[0024] S3. Start the cylinder, and make its output end press on the top of the steering wheel. Record the pressure parameters in real time through the pressure sensor on the cylinder, and observe the external extrusion deformation of the box body;

[0025] S4. According to the settings of the control panel, the following options can be selected: Regular item: The two driving components reciprocate in the same frequency and direction; Acceleration and deceleration item: The two driving components reciprocate in the same frequency and different directions; Bump item: The telescopic component reciprocates; Item superposition: Such as the combination of the regular item and the bump item;

[0026] S5. Detect the displacement of the gland mechanism through the displacement sensor on the support rod, and evaluate the strength of the corrugated cardboard box by integrating the pressure and displacement data.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The three components of the first gland assembly, the second gland assembly and the third gland assembly of the test device of the present invention are installed in a separable nested manner, forming a quickly adjustable gland mechanism, realizing precise unlocking and reconnection between the components; By adjusting the steering wheel to drive the guide rod to rotate 45 degrees to the left or right on either side, or by lifting the guide rod upward, triggering the latching unit in the suspension rod and then lowering it, quickly select the gland assembly for different sizes of corrugated cardboard boxes to be close to the top of the box body; While the gland assembly is close to the box body, the gland limiting plates on the outer periphery of the gland assembly are all close to the side wall of the box body to limit and fix the box body; Each gland assembly is provided with a limiting unit, in which the wedge-shaped plate and the clamping plate cooperate to precisely control the expansion and contraction of the limiting plate, ensuring precise fixing and release at different detection stages, so as to achieve precise limiting of the side wall of the corrugated cardboard box; The gland limiting plates are evenly distributed on the upper part of the box body and have a small contact area, generating less additional binding force on the box body, not interfering with the natural deformation process of the box body, reducing the error generated by the test equipment, and improving the inspection accuracy.

[0029] 2. Through the precise cooperation of the first gland assembly, the second gland assembly, and the third gland assembly, the detection device of the present invention realizes the flexible detection of multi-size cartons: Under normal conditions, the three assemblies are sleeved with each other to form a gland body with a flat bottom, which is convenient for the top of the box to fit; the 45-degree rotation design of the guide rod realizes three detection modes through an accurate connection and separation mechanism: In the first mode, when the guide rod is rotated to one side, the first gland convex disc rotates 45 degrees, and the convex block moves away from the first gland connecting plate. Under the action of the first gland tension spring, the first gland connecting plate retracts into the first gland body, disconnects from the column, and the first gland assembly moves downward away from the gland body, and the first gland limit plates around accurately approach the side wall of the carton; In the second mode, when the guide rod is rotated to the other side, it drives the column and the second gland convex disc to rotate synchronously. The second gland convex disc rotates 45 degrees, so that the convex block moves away from the second gland connecting plate. Under the action of the second gland tension spring, the second gland connecting plate retracts into the second gland body, disconnects from the third gland assembly, and the second gland assembly moves downward away from the gland body together with the first gland assembly, and the second gland limit plates around accurately approach the side wall of the carton; In the third mode, when the guide rod is lifted upward to trigger the hanging unit of the suspension rod, the whole gland body moves downward, and the third gland limit plate approaches the side wall of the carton; Among them, the precise contact and separation of the connecting plate and the convex disc are realized by rotating the guide rod 45 degrees. The auxiliary conversion mechanism of the first gland tension spring and the second gland tension spring, and the hanging unit of the suspension rod enhance the stability and rapid positioning ability of the gland mechanism; This device does not require additional clamping parts, can quickly and accurately perform load-bearing detection on corrugated cartons of different sizes, significantly improves the detection efficiency and applicability, and through the pressure sensor on the cylinder and the displacement sensor on the support rod, the deformation of the carton under different pressures can be monitored in real time, providing objective and accurate data support for the strength evaluation of the carton.

[0030] 3. The suspension rod of the present invention includes a sleeve, a sleeve rod, a tapered table, an inverted tapered table, a wedge block, a connecting rod, and a compression spring. When it is necessary to use the third gland assembly for inspection, the guide rod is lifted upward, driving the first gland assembly, the second gland assembly, and the third gland assembly to move upward as a whole, driving the sleeve rod and the tapered table and the inverted tapered table to move upward synchronously. The top of the inverted tapered table squeezes the two side wedge blocks back into the inner wall of the sleeve, and at the same time the inverted tapered table moves upward above the wedge block; After removing the upward external force, under the action of gravity, the inverted tapered table slides upward on the guide rod and fits with the tapered table, and the side of the guide rod abuts against the wedge block and slides downward, so that the tapered table and the inverted tapered table are separated from the limit support of the wedge block, realizing the downward movement of the sleeve rod, and finally making the three gland assemblies move downward as a whole to the top of the corrugated carton, and the third gland limit plate limits and fixes the side part of the box body; Simplify the operation process of the detection device, enable the gland mechanism to move downward quickly and accurately for inspection, with simple and efficient operation, and can automatically realize the precise positioning and fixing of the gland body, significantly improving the convenience and accuracy of the load-bearing detection of corrugated cartons. Description of the Drawings

[0031] Figure 1 Schematic three-dimensional view of the overall installation structure of the device of the present invention;

[0032] Figure 2 Schematic three-dimensional view of the split structure of the gland mechanism of the device of the present invention;

[0033] Figure 3 Schematic three-dimensional view of the cross-sectional structure of the first gland assembly of the device of the present invention;

[0034] Figure 4 Schematic three-dimensional view of the split structure of the first gland limiting unit of the device of the present invention;

[0035] Figure 5 Schematic three-dimensional view of the cross-sectional structure of the second gland assembly of the device of the present invention;

[0036] Figure 6 Schematic three-dimensional view of the mating structure between the first gland assembly and the cylinder of the device of the present invention;

[0037] Figure 7 Schematic three-dimensional view of the internal connection structure of the suspension rod of the device of the present invention;

[0038] In the figure: base - 11; control panel - 12; test bench - 13; bracket - 14; support rod - 15; top plate - 16; marking line - 17; cylinder - 18; guide sleeve - 19; steering wheel - 20; guide rod - 21; suspension rod - 22; gland mechanism - 23; first gland assembly - 24; second gland assembly - 25; third gland assembly - 26; first gland T-shaped groove - 27; first gland limiting plate - 28; first gland wedge plate - 29; first gland connecting plate - 30; cylinder - 31; groove - 32; second gland fixing groove - 33; second gland T-shaped groove - 34; second gland limiting plate - 35; second gland connecting plate - 36; second gland wedge plate - 37; third gland fixing groove - 38; third gland limiting plate - 39; first gland convex disk - 40; first gland tension spring - 41; first gland baffle - 42; first gland hinge seat - 43; first gland spring - 44; first gland clamping plate - 45; first gland reset groove - 46; first gland clamping plate groove - 47; first gland limiting tension spring - 48; through hole - 49; second gland convex disk - 50; arc groove - 51; vertical plate - 52; sleeve - 53; sleeve rod - 54; conical platform - 55; inverted conical platform - 56; guide rod - 57; wedge block - 58; connecting rod - 59; compression spring - 60. Detailed Description of the Invention

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0040] The content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0041] Figures 1-7 As shown in the figure, a corrugated cardboard box strength testing device includes a test bench 13 for placing a corrugated cardboard box. A base 11 is provided at the bottom of the test bench 13, and a control panel 12 is installed on one side of the base 11. A bracket 14 is installed above the test bench 13. A cylinder 18 is installed on the top plate 16 of the bracket 14. A support rod 15 is provided below the top plate 16. A guide sleeve 19 is fixedly provided on the support rod 15. A guide rod 21 is movably arranged inside the guide sleeve 19. The top of the guide rod 21 is fixedly provided with a steering wheel 20. The top end of the steering wheel 20 abuts against the output end of the cylinder 18. The bottom of the guide rod 21 is fixedly connected to a pressing cover mechanism 23. The pressing cover mechanism 23 includes a first pressing cover assembly 24, a second pressing cover assembly 25, and a third pressing cover assembly 26. The third pressing cover assembly 26 is connected to the bottom of the support rod 15 through a suspension rod 22. The second pressing cover assembly 25 is sleeved inside the third pressing cover assembly 26, and the first pressing cover assembly 24 is sleeved inside the second pressing cover assembly 25. The guide rod 21 movably passes through the second pressing cover assembly 25 and the third pressing cover assembly 26, and the bottom of the guide rod 21 is fixedly connected to the first pressing cover assembly 24. Under normal conditions, the first pressing cover assembly 24, the second pressing cover assembly 25, and the third pressing cover assembly 26 are all in a mutually sleeved state to form a pressing cover body. When the guide rod 21 is rotated to one side, the first pressing cover assembly 24 disengages from the pressing cover body and moves downward. When the guide rod 21 is rotated to the other side, the second pressing cover assembly 25 disengages from the pressing cover body and moves downward. Or when the guide rod 21 is lifted upward and then lowered, the entire pressing cover body moves downward, and all move to the top of the corrugated cardboard box.

[0042] The device of the present invention facilitates the rapid detection of multiple fixed dimensions of corrugated cardboard boxes without the need to additionally provide clamping components on the side, simplifies the equipment, improves efficiency, and enables large - batch detection. A marking line 17 is provided on the top of the test bench 13. Different marking lines correspond to different box sizes, facilitating the rapid positioning of the box to be tested.

[0043] Under normal conditions, when the device is in a standby state, the first capping component 24, the second capping component 25, and the third capping component 26 are all in a sleeved state with each other to form a capping body. The bottom surface of the capping body is a plane, facilitating the fitting and pressing down on the top of the box.

[0044] The first capping component 24 is detachably connected to the column 31 through the first capping connecting plate 30. The column 31 is rotatably connected to the second capping component 25. The second capping component 25 is detachably connected to the third capping component 26 through the second capping connecting plate 36, finally forming a separable capping body. The guide rod 21 passes through the second capping component 25 and the third capping component 26, and the bottom of the guide rod 21 is fixedly connected to the first capping component 24.

[0045] During use, when the steering wheel 20 is rotated to one side to drive the guide rod 21 to rotate by 45°, the guide rod 21 drives the first capping convex disk 40 to rotate, releasing the external extrusion on the first capping connecting plate 30. Under the action of the first capping spring 41, the first capping connecting plate 30 retracts into the first capping component 24 and simultaneously disconnects from the column 31 in the second capping component 25. The first capping component 24 disengages from the capping body and moves downward to be close to the top of the corrugated cardboard box, and the first capping limit plates 28 all disengage from the first capping body and move downward. The first capping limit plates 28 around all are close to the side walls of the corrugated cardboard box, forming a fixed state. At this time, the air cylinder 18 is started to make the output end of the air cylinder press on the top of the steering wheel 20, record parameters through the pressure sensor, and observe the external extrusion deformation of the box.

[0046] Or, when the steering wheel 20 is rotated to the other side to drive the guide rod 21 to rotate by 45°, the guide rod 21 drives the second capping convex disk 50 and the column 31 to rotate together through the vertical plate 52. The second capping convex disk 50 releases the external extrusion on the second capping connecting plate 36. Under the action of the second capping spring, the second capping connecting plate 36 retracts into the second capping component 25 and simultaneously disconnects from the third capping component 26. The second capping component 25 disengages from the capping body and moves downward together with the first capping component to be close to the top of the corrugated cardboard box, and the second capping limit plates 35 all disengage from the second capping body and move downward. The second capping limit plates 35 around all are close to the side walls of the corrugated cardboard box, forming a fixed state. At this time, the air cylinder 18 is started to make the output end of the air cylinder press on the top of the steering wheel 20, record parameters through the pressure sensor, and observe the external extrusion deformation of the box.

[0047] Alternatively, the guide rod 21 is lifted upwards through the steering wheel 20 to trigger the hook unit inside the suspension rod 22 and then lowered, so that the entire cover body moves downward close to the top of the corrugated box, and the third cover limit plates 39 are close to the side walls of the corrugated box to form a fixed state. At this time, the cylinder 18 is started so that the output end of the cylinder applies pressure to the top of the steering wheel 20, the parameters are recorded through the pressure sensor, and the extrusion deformation of the outer box body is observed;

[0048] Through any of the above three methods, the pressure covers and limit plates of different sizes can be touched to fix the corresponding corrugated box body and then perform pressure testing. The device can be flexibly converted and the operation is simple and fast.

[0049] In the process of transporting goods, corrugated boxes will be subjected to vibration during transportation, and corrugated boxes are mostly stacked, which will bear the lateral stress and vertical compression deformation caused by vibration; this device is designed to simulate the vibration of transportation and detect the vibration resistance under different superimposed pressures (excluding the side force).

[0050] In this device, a driving part and a telescopic component are installed inside the base 11. The base 11 cooperates with the test bench 13 to generate detection items. The detection items at least include conventional items, acceleration and deceleration items, and bumpy items, as well as the superposition of conventional items and bumpy items and acceleration and deceleration items and bumpy items.

[0051] In the conventional project, the control panel 12 is used to control the driving parts on both sides to reciprocate at the same frequency and in different directions; the driving parts on both sides reciprocate at the same frequency and in different directions, which can simulate GB / T 4857.7-2005 Basic Test for Packages for Transport Part 7: Sine Constant Frequency Vibration Test and GB / T 4857.10-2005 Basic Test for Packages for Transport Part 10: Sine Variable Frequency Vibration Test. Conventional projects can be used as basic vibration tests to determine the ability of corrugated boxes to withstand specific environmental vibrations; in addition, the resonance points of samples and contents during transportation can be tested, and whether the samples and contents will be damaged when the samples or contents resonate can be tested.

[0052] During acceleration and deceleration projects, the control panel 12 is used to control the reciprocating operation of the driving parts on both sides at the same frequency and direction; the control panel 12 is used to control the reciprocating operation of the telescopic component during bumpy projects; when the corrugated cardboard boxes are stacked and are bumped during transportation, the corrugated cardboard boxes stacked on top may squeeze the corrugated cardboard boxes below. The cover mechanism 23 is used to simulate the box above the corrugated box, so as to accurately obtain the anti-vibration parameters of the corrugated cardboard boxes during actual use.

[0053] In the case of the superposition of two projects, it corresponds to the superposition operation of two rules: when a regular project is superimposed with a bumpy project, the control panel 12 is used to control the two side driving members to reciprocate in the same frequency and different directions and the telescopic assembly to reciprocate; when an acceleration / deceleration project is superimposed with a bumpy project, the control panel 12 is used to control the two side driving members to reciprocate in the same frequency and direction and the telescopic assembly to reciprocate.

[0054] Both the driving member and the cylinder 18 are signal-connected to the control panel 12. The control panel 12 is used to receive user instructions, obtain inspection items according to the user instructions, and control the driving member and the cylinder 18 to operate according to the corresponding rules according to the inspection items.

[0055] The base 11 and the test bench 13 cooperate to generate inspection items. The components in the base 11 and the test bench 13, as well as the control panel 12 and the cylinder 18, are all prior arts, and the principles and structures are not described in detail here.

[0056] Furthermore, the third gland assembly 26 is of a frame structure. Third gland fixing grooves 38 are arrayed on the inner walls of the frame, and third gland limiting plates 39 are arrayed at the bottom end of the frame.

[0057] Figure 1 and Figure 2 As shown in [reference], the frame structure of the third gland assembly 26 is fixedly connected to the support rod 15, enhancing the stable support of the gland mechanism 23 and facilitating the smooth detachment and downward movement of the first gland assembly 24 or the second gland assembly 25; at the same time, under the action of the hanging unit of the suspension rod 22, the third gland assembly 26 moves up and down, providing a support force and maintaining the angle stability of the third gland assembly 26.

[0058] Furthermore, the first gland assembly 24 includes a first gland body with a cavity structure. A first gland convex disk 40 is rotatably installed inside the first gland body. The top end of the first gland convex disk 40 is fixedly connected to the bottom of the guide rod 21. First gland connecting plates 30 are slidably arranged around the first gland convex disk 40. The first gland connecting plates 30 are limited by chutes. First gland tension springs 41 are arranged on one side of the first gland connecting plates 30 close to the first gland convex disk 40; a plurality of first gland limiting units are arranged on the outer periphery of the first gland body.

[0059] Figure 3 As shown in [reference], by adjusting the rotation of the guide rod 21 to drive the rotation of the first gland convex disk 40, the rotation angle of the first gland convex disk 40 is 45°, so that the convex blocks on the first gland convex disk 40 are away from the first gland connecting plates 30. Under the action of the first gland tension springs 41, the first gland connecting plates 30 retract from the second gland fixing grooves 33 into the first gland body, releasing the connection between the first gland assembly 24 and the second gland assembly 25;

[0060] It should be noted that a groove 32 adapted to the size of the first gland body is provided at the bottom of the column 31, and several second gland fixing grooves 33 are provided on the inner wall of the groove 32;

[0061] When the first gland connecting plate 30 extends out of the first gland body, it enters the inside of the second gland fixing groove 33, and fixedly connects the first gland assembly 24 and the column 31;

[0062] The column 31 and the second gland convex disk 50 are fixedly connected. The second gland convex disk 50 is rotatably arranged on the top of the second gland body, and the column 31 is rotatably installed in the through hole 49 of the second gland body; arc-shaped grooves 51 communicating with each other are provided on both the column 31 and the second gland convex disk 50, and a vertical plate 52 is fixed on the guide rod 21, and the vertical plate 52 is located inside the arc-shaped groove 51.

[0063] When the guide rod 21 rotates towards the side where the opening of the arc-shaped groove 51 is located, the guide rod 21 rotates in the arc-shaped groove 51, and the guide rod 21 drives the first gland convex disk 40 to rotate, realizing the conversion of the connection relationship between the first gland assembly 24 and the second gland assembly 25; when the guide rod 21 rotates towards the side where the arc-shaped groove 51 is close to the side wall, it drives the column 31 and the second gland convex disk 50 to rotate together, and the rotation of the second gland convex disk 50 realizes the conversion of the connection relationship between the second gland assembly 25 and the third gland assembly 26.

[0064] Among them, the angle of the arc-shaped groove 51 is 45°, which is beneficial to the position conversion of the connecting plate and the convex disk in the first gland assembly 24 and the second gland assembly 25, and realizes complete contact and separation.

[0065] Furthermore, the first gland limiting unit includes a first gland limiting plate 28 and a first gland T-shaped groove 27. The first gland T-shaped groove 27 is located on one side of the first gland body. The T-shaped part of the first gland limiting plate 28 is connected to the bottom of the first gland T-shaped groove 27 through a first gland limiting tension spring 48, and the limiting part of the first gland limiting plate 28 slides up and down on the outside of the first gland body, and a first gland resetting member is arranged on one side of the first gland T-shaped groove 27.

[0066] Figure 3 and Figure 4 As shown in, the first gland limiting plate 28 has a T-shaped part and a limiting part that are vertically connected.

[0067] When the first gland assembly 24 is located inside the second gland assembly 25, the first gland reset member supports and limits the first gland limiting plate 28, so that the first gland limiting plate 28 is located inside the first gland body. When the first gland assembly 24 is separated from the second gland assembly 25, the first gland reset member releases the support and limit on the first gland limiting plate 28. Under the action of the first gland limiting tension spring 48, the first gland limiting plate 28 bears a downward pulling force, and the limiting portion of the first gland limiting plate 28 is outside the first gland body, realizing the limiting and fixing of the corrugated cardboard box.

[0068] Furthermore, the first gland reset member includes a first gland wedge plate 29. A first gland reset groove 46 and a first gland clamping plate groove 47 are opened on one side of the first gland T-shaped groove 27. The first gland reset groove 46 communicates with the first gland T-shaped groove 27. The first gland wedge plate 29 is installed inside the first gland reset groove 46. The first gland baffle 42 is fixedly arranged on the first gland wedge plate 29. A first gland spring 44 is sleeved on the first gland wedge plate 29. The other end of the first gland wedge plate 29 is hinged with a first gland clamping plate 45. When the first gland clamping plate 45 is in a horizontal position, it forms a support for the first gland limiting plate 28. When the first gland clamping plate 45 is in a vertical state, it is located in the first gland clamping plate groove 47, which is beneficial to the upward reset of the first gland limiting plate 28.

[0069] Figure 4 As shown in, when the first gland assembly 24 is located inside the second gland assembly 25, the first gland wedge plate 29 is compressed into the first gland reset groove 46, so that the first gland clamping plate 45 forms a support for the first gland limiting plate 28, realizing that the first gland limiting plate 28 is inside the first gland body;

[0070] When the first gland assembly 24 is located outside the second gland assembly 25, under the action of the first gland spring 44, the first gland wedge plate 29 moves outward, driving the first gland clamping plate 45 into the first gland reset groove 46, releasing the limit on the first gland limiting plate 28, and the first gland limiting plate 28 moves downward to limit and fix the corrugated cardboard box body;

[0071] The first gland clamping plate 45 and the first gland wedge plate 29 are connected through a first gland hinge seat 43, and the bottom of the first gland hinge seat 43 has a supporting effect on the first gland clamping plate 45, enabling the first gland clamping plate 45 to rotate within a range of 90 degrees between the vertical and horizontal positions;

[0072] Complete the reset after the first gland limiting plate 28 moves downward. When the first gland wedge plate 29 is inside the first gland body, the first gland clamping plate 45 is extruded and located in the first gland T-shaped groove 27. At this time, push the first gland limiting plate 28 upward to squeeze the first gland clamping plate 45, so that the first gland clamping plate 45 rotates vertically by 90 degrees and then returns to the horizontal state to form a support again, making the first gland limiting plate 28 inside the first gland body; complete the reset after the first gland limiting plate 28 moves downward for use.

[0073] It should be noted that an elastic member is provided at the upper part of the first gland clamping plate groove 47, which is beneficial for the first gland clamping plate 45 to return to the horizontal state.

[0074] Furthermore, the second gland assembly 25 includes a second gland body with a cavity structure. A second gland convex disc 50 is rotatably installed inside the second gland body. Second gland connecting plates 36 are slidably arranged around the second gland convex disc 50. The second gland connecting plates 36 are limited by chutes. Second gland tension springs are arranged on one side of the second gland connecting plates 36 close to the second gland convex disc 50; several second gland limiting units are arranged on the outer periphery of the second gland body; a through hole 49 is opened in the middle of the second gland body, and a column body 31 is installed in the through hole 49. The top of the column body 31 is fixedly connected to the bottom end of the second gland convex disc 50 to form a rotating body; a groove is opened at the bottom of the column body 31, and the first gland assembly 24 is installed in the groove. The guide rod 21 passes through the rotating body and is fixedly connected to the first gland convex disc 40 of the first gland assembly 24; an arc-shaped groove 51 is opened on the rotating body, and a vertical plate 52 is fixed on the guide rod 21. The vertical plate 52 is located inside the arc-shaped groove 51.

[0075] Figure 5 As shown in, when the guide rod 21 rotates towards the side where the arc-shaped groove 51 opens, the guide rod 21 rotates in the arc-shaped groove 51, and the guide rod 21 drives the first gland convex disc 40 to rotate, realizing the conversion of the connection relationship between the first gland assembly 24 and the second gland assembly 25; when the guide rod 21 rotates towards the side where the arc-shaped groove 51 is close to the side wall, it drives the column body 31 and the second gland convex disc 50 to rotate together, and the rotation of the second gland convex disc 50 realizes the conversion of the connection relationship between the second gland assembly 25 and the third gland assembly 26.

[0076] Among them, the angle of the arc-shaped groove 51 is 45°, which is beneficial for the position conversion of the connecting plate and the convex disc in the first gland assembly 24 and the second gland assembly 25, and realizes complete contact and separation.

[0077] When the column body 31 and the second gland convex disc 50 rotate together with the guide rod 21,

[0078] The rotation angle of the second gland convex disk 50 is 45°, so that the convex block on the second gland convex disk 50 is away from the second gland connecting plate 36. Under the action of the second gland tension spring, the second gland connecting plate 36 retracts from the third gland fixing groove 38 into the interior of the second gland body, releasing the connection between the second gland assembly 25 and the third gland assembly 26; at this time, the first gland assembly 24 and the second gland assembly 25 are detached from the third gland assembly 26 as a whole to inspect the corrugated carton box body.

[0079] The column 31 and the second gland convex disk 50 are fixedly connected. The second gland convex disk 50 is rotatably arranged on the top of the second gland body. The column 31 is rotatably installed in the through hole 49 of the second gland body; arc-shaped grooves 51 that communicate with each other are provided on both the column 31 and the second gland convex disk 50. A vertical plate 52 is fixed on the guide rod 21, and the vertical plate 52 is located inside the arc-shaped groove 51.

[0080] Further, the second gland limiting unit includes a second gland limiting plate 35 and a second gland T-shaped groove 34. The second gland T-shaped groove 34 is located on one side of the second gland body. The T-shaped part of the second gland limiting plate 35 is connected to the bottom of the second gland T-shaped groove 34 through a second gland limiting tension spring. The limiting part of the second gland limiting plate 35 slides up and down on the outside of the second gland body. A second gland resetting member is arranged on one side of the second gland T-shaped groove 34; the second gland resetting member includes a second gland wedge plate 37. A second gland resetting groove and a second gland clamping plate groove are provided on one side of the second gland T-shaped groove 34. The second gland resetting groove communicates with the second gland T-shaped groove 34. The second gland wedge plate 37 is installed inside the second gland resetting groove. A second gland baffle is fixed on the second gland wedge plate 37. A second gland spring is sleeved on the second gland wedge plate 37. The other end of the second gland wedge plate 37 is hinged to a second gland clamping plate. When the second gland clamping plate is in a horizontal position, it forms a support for the second gland limiting plate 35. When the second gland clamping plate is in a vertical state, it is located in the clamping plate groove, which is beneficial to the upward reset of the second gland limiting plate 35.

[0081] Figures 3-5 As shown in the figure, the structure of the second gland limiting unit is similar to that of the first gland limiting unit and the principle is the same. The specific working process can refer to the first gland limiting unit.

[0082] Further, the suspension rod 22 includes a sleeve 53 and a sleeve rod 54. A hanging buckle unit is arranged inside the sleeve 53. The hanging buckle unit includes a conical platform 55, an inverted conical platform 56, a wedge block 58, a connecting rod 59 and a compression spring 60. The end of the sleeve rod 54 is fixedly connected to a guide rod 57. The top of the guide rod 57 is fixedly provided with the conical platform 55. The inverted conical platform 56 is slidably sleeved on the guide rod 57. A through hole is opened on the sleeve 53. The through holes are located on the opposite side walls of the sleeve 53. The wedge block 58 is slidably installed in the through holes on both sides. A connecting rod 59 is fixedly provided at the end of the wedge block 58 close to the outside. The compression spring 60 is sleeved on the connecting rod 59.

[0083] Figure 7 The figure in the middle is the state diagram when the hanging buckle unit is locked. When it is necessary to use the third gland assembly 26 for inspection, the guide rod 21 is lifted upward, driving the interconnected first gland assembly 24, second gland assembly 25 and third gland assembly 26 to move upward together, driving the sleeve rod 54, the conical platform 55 and the inverted conical platform 56 to move upward together. The top of the inverted conical platform 56 squeezes the wedge blocks 58 on both sides and compresses them back into the inner wall of the sleeve 53. At the same time, the inverted conical platform 56 moves upward to the upper side of the wedge blocks 58. At this time, when the upward external force on the guide rod 21 is released, under the action of gravity, the inverted conical platform 56 slides upward on the guide rod 57 and fits with the conical platform 55. The side of the guide rod 57 abuts against the wedge blocks 58 and slides downward, so that the conical platform 55 and the inverted conical platform 56 are separated from the limit support of the wedge blocks 58 together, realizing the downward movement of the sleeve rod 54. Finally, the first gland assembly 24, the second gland assembly 25 and the third gland assembly 26 move downward together as a whole to the bottom of the corrugated cardboard box. The third gland limiting plate 39 limits and fixes the side part of the box body. The hanging buckle unit enables the gland mechanism 23 to move downward quickly for inspection, with simple operation and improved efficiency.

[0084] Further, a pressure sensor (not shown in the figure) is provided at the output end of the cylinder 18 for real-time monitoring of the pressure value; a displacement sensor (not shown in the figure) is provided on the support rod 15 for detecting the displacement of the gland mechanism; both the pressure sensor and the displacement sensor are electrically connected to the control panel.

[0085] By installing a pressure sensor at the output end of the cylinder and a displacement sensor on the support rod, the real-time monitoring of the pressure and displacement during the strength test of the corrugated cardboard box is realized. Both sensors are electrically connected to the control panel 12, and can accurately record the deformation of the cardboard box under different pressures, providing objective and real-time data support for the strength evaluation of the cardboard box, effectively improving the accuracy and reliability of the test. A camera is arranged on one side of the detection device to photograph the deformation situation during the test, which is conducive to further providing support for the data.

[0086] The method of using the device for testing includes the following steps:

[0087] S1. Place the corrugated cardboard box to be tested on the test bench 13 and accurately position it according to the corresponding marking line 17 based on the box size;

[0088] S2. Select a capping component of a suitable size for the capping mechanism 23, specifically including:

[0089] S21. Rotate the steering wheel 20 to one side, causing the guide rod 21 to rotate by 45 degrees. The first capping component 24 disengages from the capping body and moves down to the top of the corrugated cardboard box, and the first capping limit plate 28 is close to the side wall of the cardboard box to achieve limit fixation;

[0090] S22. Rotate the steering wheel 20 to the other side, causing the guide rod 21 to rotate by 45 degrees. The second capping component 25 disengages from the capping body and moves down to the top of the corrugated cardboard box, and the second capping limit plate 35 is close to the side wall of the cardboard box to achieve limit fixation;

[0091] S23. Lift the guide rod 21 upward to trigger the hanging unit of the suspension rod 22, causing the entire capping body to move down to the top of the corrugated cardboard box, and the third capping limit plate 39 is close to the side wall of the cardboard box to achieve limit fixation;

[0092] S3. Start the cylinder 18, apply pressure to the top of the steering wheel 20 through its output end, record the pressure parameters in real time through the pressure sensor on the cylinder 18, and observe the external extrusion deformation of the box body;

[0093] S4. Detect the displacement of the capping mechanism 23 through the displacement sensor on the support rod 15, and evaluate the strength of the corrugated cardboard box based on the comprehensive pressure and displacement data.

[0094] The present invention illustrates the technical concept of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that the relevant improvements to the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A corrugated box strength testing device, comprising a test bench (13) for placing the corrugated box, a base (11) being arranged at the bottom of the test bench (13), a control panel (12) being installed on one side of the base (11), and a bracket (14) being installed above the test bench (13), characterized in that: A cylinder (18) is installed on the top plate (16) of the bracket (14), a support rod (15) is arranged below the top plate (16), a guide sleeve (19) is fixedly arranged on the support rod (15), a guide rod (21) is movably arranged inside the guide sleeve (19), a steering wheel (20) is fixedly arranged on the top of the guide rod (21), the top of the steering wheel (20) abuts against the output end of the cylinder (18), and the bottom of the guide rod (21) is fixedly connected to a pressure cover mechanism (23); The capping mechanism (23) comprises a first capping assembly (24), a second capping assembly (25) and a third capping assembly (26); the third capping assembly (26) is connected to the bottom of the support rod (15) through a suspension rod (22); the second capping assembly (25) is sleeved inside the third capping assembly (26); the first capping assembly (24) is sleeved inside the second capping assembly (25); the guide rod (21) is movably inserted into the second capping assembly (25) and the third capping assembly (26); and the bottom of the guide rod (21) is fixedly connected to the first capping assembly (24); Under normal conditions, the first cover assembly (24), the second cover assembly (25) and the third cover assembly (26) are all in a mutually nested state to form a cover body; when the guide rod (21) is rotated to one side, the first cover assembly (24) is separated from the cover body and moves downward, or when the guide rod (21) is rotated to the other side, the second cover assembly (25) is separated from the cover body and moves downward, or the guide rod (21) is lifted upward and then lowered, and the cover body moves downward as a whole and moves to the top of the corrugated paper box; The first gland assembly (24) comprises a first gland body with a cavity structure, a first gland convex disc (40) is rotatably mounted inside the first gland body, the top of the first gland convex disc (40) is fixedly connected to the bottom of the guide rod (21), a first gland connecting plate (30) is slidably arranged around the first gland convex disc (40), the first gland connecting plate (30) is limited by a slide groove, and a first gland connecting plate (30) is arranged on one side close to the first gland convex disc (40). a gland tension spring (41); a plurality of first gland limiting units are arranged on the outer periphery of the first gland body; the first gland limiting unit comprises a first gland limiting plate (28) and a first gland T-shaped groove (27); the first gland T-shaped groove (27) is located on one side of the first gland body; the T-shaped portion of the first gland limiting plate (28) is connected to the bottom of the first gland T-shaped groove (27) through the first gland limiting tension spring (48); the limiting portion of the first gland limiting plate (28) slides up and down A first gland reset member is arranged on the outer side of the first gland body, on one side of the first gland T-slot (27); the first gland reset member comprises a first gland wedge plate (29); a first gland reset groove (46) and a first gland clamping plate groove (47) are arranged on one side of the first gland T-slot (27); the first gland reset groove (46) and the first gland T-slot (27) are connected; the first gland wedge plate (29) is installed inside the first gland reset groove (46); The cover wedge plate (29) is fixed with a first cover stopper (42), the first cover wedge plate (29) is sleeved with a first cover spring (44), the other end of the first cover wedge plate (29) is hinged to a first cover clamping plate (45), when the first cover clamping plate (45) is in a horizontal position, it supports the first cover limit plate (28), when the first cover clamping plate (45) is in a vertical state, it is located in a first cover clamping plate groove (47), which is beneficial for the first cover limit plate (28) to reset upward.

2. The corrugated box strength testing device according to claim 1, characterized in that: The third gland assembly (26) is a frame structure, the inner wall of the frame is provided with third gland fixing grooves (38) in an array, and the bottom end of the frame is provided with third gland limiting plates (39) in an array.

3. The corrugated box strength testing device according to claim 2, characterized in that: The second gland assembly (25) comprises a second gland body with a cavity structure, a second gland convex disc (50) is rotatably mounted inside the second gland body, second gland connecting plates (36) are slidably arranged around the second gland convex disc (50), the second gland connecting plates (36) are limited by sliding grooves, and a second gland tension spring is arranged on one side of the second gland connecting plates (36) close to the second gland convex disc (50); a plurality of second gland limiting units are arranged on the outer periphery of the second gland body; A through hole (49) is provided in the middle of the second gland body, a column (31) is installed in the through hole (49), the top of the column (31) is fixedly connected to the bottom end of the second gland boss (50) to form a swivel; a groove is provided at the bottom of the column (31), the first gland assembly (24) is installed in the groove, the guide rod (21) is passed through the swivel and fixedly connected to the first gland boss (40) of the first gland assembly (24); an arc groove (51) is provided on the swivel, a vertical plate (52) is fixed on the guide rod (21), and the vertical plate (52) is located inside the arc groove (51).

4. The corrugated box strength testing device according to claim 3, characterized in that: The second gland limiting unit comprises a second gland limiting plate (35) and a second gland T-shaped groove (34), wherein the second gland T-shaped groove (34) is located at one side of the second gland body, the T-shaped portion of the second gland limiting plate (35) is connected to the bottom of the second gland T-shaped groove (34) via a second gland limiting tension spring, the limiting portion of the second gland limiting plate (35) slides up and down on the outside of the second gland body, and a second gland reset member is arranged at one side of the second gland T-shaped groove (34); The second gland reset member comprises a second gland wedge plate (37), a second gland reset groove and a second gland clamping plate groove are provided on one side of the second gland T-slot (34), the second gland reset groove and the second gland T-slot (34) are connected, the second gland wedge plate (37) is installed inside the second gland reset groove, the second gland baffle is fixed on the second gland wedge plate (37), a second gland spring is sleeved on the second gland wedge plate (37), the other end of the second gland wedge plate (37) is hinged to the second gland clamping plate, the second gland clamping plate forms a support for the second gland limit plate (35) when the second gland clamping plate is in a horizontal position, and is located in the clamping plate groove when the second gland clamping plate is in a vertical state, so as to facilitate the upward reset of the second gland limit plate (35).

5. The corrugated box strength testing device according to claim 3, characterized in that: The suspension rod (22) comprises a sleeve (53) and a sleeve rod (54), the end of the sleeve rod (54) is fixedly connected to a guide rod (57), a conical platform (55) is fixedly arranged at the top end of the guide rod (57), an inverted conical platform (56) is slidably arranged on the guide rod (57), a through hole is opened on the sleeve (53), the through hole is located on the opposite side wall of the sleeve (53), wedge blocks (58) are slidably installed in the through holes on both sides, a connecting rod (59) is fixedly arranged on the end of the wedge block (58) close to the outer side, and a compression spring (60) is sleeved on the connecting rod (59).

6. The corrugated box strength testing device according to claim 3, characterized in that: The output end of the cylinder (18) is provided with a pressure sensor for real-time monitoring of the pressure value; the support rod (15) is provided with a displacement sensor for detecting the displacement of the capping mechanism; the pressure sensor and the displacement sensor are both electrically connected to the control panel.

7. A method for testing using the device according to any one of claims 4 to 6, characterized in that: The following steps are involved: S1. Place the corrugated paper box to be tested on the test bench (13), and select the corresponding marking line (17) according to the size of the box for precise positioning; S2, selecting a capping assembly of suitable size for the capping mechanism (23), specifically comprising: S21, rotating the steering wheel (20) to one side, so that the guide rod (21) rotates 45 degrees, the first cover assembly (24) is separated from the cover body and moves down to the top of the corrugated paper box, and the first cover limit plate (28) is close to the side wall of the paper box to achieve limit fixation; S22, rotating the steering wheel (20) to the other side, so that the guide rod (21) rotates 45 degrees, the second cover assembly (25) is separated from the cover body and moves down to the top of the corrugated paper box, and the second cover limit plate (35) is close to the side wall of the paper box to achieve limit fixation; S23, lift the guide rod (21) upward to trigger the hook unit of the suspension rod (22), so that the cover body moves downward to the top of the corrugated paper box as a whole, and the third cover limiting plate (39) is close to the side wall of the paper box to achieve limiting fixation; S3, starting the cylinder (18) so that its output end applies pressure to the top of the steering wheel (20), recording the pressure parameters in real time through the pressure sensor on the cylinder (18), and observing the extrusion deformation of the outer part of the box; S4. Detect the displacement of the capping mechanism (23) through the displacement sensor on the support rod (15), and evaluate the strength of the corrugated paper box by combining the pressure and displacement data.

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