Tensile resistance test equipment for simulating human hand to tear easy-to-tear carton

Abstract

The invention relates to the technical field of tensile resistance testing machines, in particular to tensile resistance testing equipment for simulating a human hand to tear an easy-to-tear carton. Comprising a machine table, a fixing assembly arranged on the table top of the machine table and used for fixing a carton easy to tear, an oblique movement driving mechanism obliquely arranged on the machine table and located above the fixing assembly, a force sensor arranged at the moving end of the oblique movement driving mechanism and a tearing clamp arranged at the input end of the force sensor, and a tearing groove is formed in the top face of the fixing assembly; when the fixing assembly fixes the easy-to-tear carton, the easy-to-tear strip of the easy-to-tear carton is exposed in the tearing groove. According to the invention, a tensile resistance test can be carried out on the easy-to-tear carton by simulating a mode of tearing the easy-to-tear strip of the easy-to-tear carton by a human hand, and the accuracy of the resistance test on the easy-to-tear carton is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tensile testing machines, in particular to a tensile testing device for simulating human hands tearing an easy-tear paper box. Background Art

[0002] An easy-tear carton is a carton designed for easy opening. The easy-tear carton has a pre-cut tear strip. When using it, you only need to gently tear the tear strip to open the carton, without tools. It is widely used in food packaging, express packaging, e-commerce packaging and other scenarios. Since the tearing force required for easy-tear cartons in different scenarios is different, the tearing force of the tear strip of the easy-tear carton is an important parameter indicator of the easy-tear carton. Among the existing patents, the applicant applied for a Chinese patent document with application number 202021865919.4 on August 31, 2020, which discloses a high-speed peeling force testing machine, including a shell, a driving mechanism arranged on the shell, a block arranged on the driving mechanism, and a test seat slidably arranged on the shell, the driving mechanism drives the block to perform closed-loop motion, the closed-loop motion includes a straight line test path, the test seat is movably provided with a movable block, and the area through which the movable block moves when the test seat slides along the shell is called an idle path, the movable block can be movably extended to the straight line test path or retracted to the idle path; when the movable block is extended to the straight line test path, the movable block cooperates and abuts against the block. This patent document can test the peeling force of the tape. However, when performing the peeling force test, the clamping device is fixed and the peeling of the tape is achieved by moving the tape. When tearing the tear strip of the easy-tear carton, the carton is fixed and the tear strip is torn by hand. Therefore, not only can the tensile strength of the tear strip of the easy-tear carton not be tested, but it is also impossible to simulate the tearing of the easy-tear carton by hand.

[0003] Therefore, the defects are very obvious and a solution is urgently needed. Summary of the invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide a tensile test device that simulates human hands tearing an easy-tear carton.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A tensile force testing device for simulating human hand tearing of an easy-tear carton, comprising a machine platform, a fixing component arranged on the table of the machine platform and used to fix the easy-tear carton, an oblique drive mechanism obliquely installed on the machine platform and located above the fixing component, a force sensor installed at the moving end of the oblique drive mechanism and a tearing clamp installed at the input end of the force sensor, wherein a tearing groove is arranged on the top surface of the fixing component; when the easy-tear carton is fixed by the fixing component, the easy-tear strip of the easy-tear carton is exposed in the tearing groove.

[0007] Furthermore, one end of the fixed component is rotatably connected to the machine platform via a rotating shaft, the rotating shaft is arranged near the bottom end of the oblique driving mechanism, and an angle adjustment mechanism is arranged between the other end of the fixed component and the machine platform; the angle adjustment mechanism is used to adjust the angle of the fixed component.

[0008] Furthermore, the angle adjustment mechanism includes an arc plate installed at the end of the fixing component, a plurality of clamping shafts arranged on the arc plate along the arc line of the arc plate, and a clamping member detachably connected to the machine, and the clamping member is used to clamp one of the clamping shafts.

[0009] Furthermore, a clamping groove is provided at one end of the clamping part, and the clamping shaft is clamped in the clamping groove; a screw hole is provided at the other end of the clamping part, and a locking bolt is detachably connected to the threaded hole. The machine is provided with a translation groove, and the screw rod of the locking bolt passes through the translation groove and is threadedly connected to the threaded hole.

[0010] Furthermore, the machine is provided with a receiving space for receiving the arc-shaped plate.

[0011] Furthermore, the fixing assembly includes a base plate and two locking plates arranged in parallel. One end of the base plate is rotatably connected to the machine via a rotating shaft. The two locking plates are detachably mounted on the top surface of the base plate. A tearing groove is formed between the two locking plates. The easy-to-tear carton is fixed between the top surface of the base plate and the bottom surfaces of the two locking plates.

[0012] Furthermore, the locking plate is locked on the base plate via a locking bolt. The locking plate is provided with an adjustment slot. The screw of the locking bolt passes through the adjustment slot and is threadedly connected to the base plate. The adjustment slot is used to adjust the distance between the two locking plates.

[0013] Furthermore, a telescopic support rod is provided between the middle part of the bottom surface of the fixed component and the machine platform, one end of the telescopic support rod is hinged to the middle part of the bottom surface of the fixed component, and the other end of the telescopic support rod is hinged to the machine platform.

[0014] Furthermore, the force sensor is installed at the moving end of the oblique driving mechanism via a lifting and adjusting mechanism, and the lifting and adjusting mechanism is used to adjust the height of the force sensor and the tearing clamp.

[0015] Furthermore, the lifting adjustment mechanism includes a lifting guide rod installed on the moving end of the oblique driving mechanism, a lifting seat slidably sleeved outside the lifting guide rod and a locking member for locking the lifting seat to the lifting guide rod, and the force sensor is installed on the lifting seat.

[0016] Beneficial effects of the present invention: In practical applications, at the beginning, the tearing clamp is located at the bottom end of the oblique driving mechanism, the tearable carton is fixed on the fixed component, the tearable strip of the tearable carton is exposed in the tearing groove, the tearing clamp clamps the free end of the tearable strip, and then the oblique driving mechanism drives the force sensor to move the tearing clamp upward, so that the tearing clamp tears the tearable strip of the tearable carton upward, and in the process of tearing the tearable strip, the force sensor monitors the tearing force of the tearing strip to test the tensile strength of the tearable carton. The present invention can simulate the method of tearing the tearable strip of the tearable carton by hand to test the tensile strength of the tearable carton, thereby improving the accuracy of the resistance test of the tearable carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the present invention after the first column, the second column, the oblique driving mechanism, the force sensor, the tearing clamp and the lifting adjustment mechanism are hidden.

[0019] Figure 3 It is a cross-sectional view of the lifting and lowering adjustment mechanism, the force sensor and the tearing clamp of the present invention.

[0020] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0021] Description of reference numerals:

[0022] 1. Machine platform; 2. Fixing assembly; 3. Oblique drive mechanism; 4. Force sensor; 5. Tearing fixture; 6. Tearing groove; 7. Rotating shaft; 8. Angle adjustment mechanism; 9. Arc plate; 10. Clamping shaft; 11. Clamping piece; 12. Clamping groove; 13. Locking bolt; 15. Handle; 17. Accommodating space; 18. Bottom plate; 19. Locking plate; 20. Locking bolt; 21. Adjustment groove; 22. Telescopic support rod; 23. Lifting adjustment mechanism; 24. Lifting guide rod; 25. Lifting seat; 26. Locking piece; 27. Height adjustment hole; 29. ​​Control box; 30. First column; 31. Second column. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0024] like Figures 1 to 4As shown, the present invention provides a tensile force testing device for simulating human hand tearing of an easy-tear carton, comprising a machine platform 1, a fixing component 2 arranged on the table top of the machine platform 1 and used to fix the easy-tear carton, an oblique driving mechanism 3 obliquely installed on the machine platform 1 and located above the fixing component 2, a force sensor 4 installed at the moving end of the oblique driving mechanism 3 and a tearing clamp 5 installed at the input end of the force sensor 4, and a tearing groove 6 is provided on the top surface of the fixing component 2; when the fixing component 2 fixes the easy-tear carton, the easy-tear strip of the easy-tear carton is exposed in the tearing groove 6.

[0025] In practical application, at the beginning, the tearing clamp 5 is located at the bottom end of the oblique driving mechanism 3, the tearable carton is fixed on the fixing component 2, the tearable strip of the tearable carton is exposed in the tearing groove 6, the tearing clamp 5 clamps the free end of the tearable strip, and then the oblique driving mechanism 3 drives the force sensor 4 to move the tearing clamp 5 upward, so that the tearing clamp 5 tears the tearable strip of the tearable carton upward, and in the process of tearing the tearable strip, the force sensor 4 monitors the tearing force of the tearing strip to test the tensile strength of the tearable carton. The present invention can simulate the method of tearing the tearable strip of the tearable carton by hand to test the tensile strength of the tearable carton, thereby improving the accuracy of the resistance test of the tearable carton.

[0026] In this embodiment, one end of the fixed component 2 is rotatably connected to the machine 1 via a rotating shaft 7, and the rotating shaft 7 is arranged close to the bottom end of the oblique driving mechanism 3. An angle adjustment mechanism 8 is arranged between the other end of the fixed component 2 and the machine 1; the angle adjustment mechanism 8 is used to adjust the angle of the fixed component 2.

[0027] In practical applications, the angle of the easy-tear carton is adjusted by adjusting the inclination angle of the fixing component 2 relative to the horizontal plane through the angle adjustment mechanism 8, thereby adjusting the angle of the easy-tear carton, and then the tensile strength test of the easy-tear carton can be performed at different angles, which is highly practical.

[0028] In this embodiment, the angle adjustment mechanism 8 includes an arc plate 9 installed at the end of the fixed component 2, a plurality of clamping shafts 10 arranged on the arc plate 9 along the arc line of the arc plate 9, and a clamping member 11 detachably connected to the machine 1, and the clamping member 11 is used to clamp one of the clamping shafts 10. In actual application, the clamping member 11 releases the clamping shaft 10 on the arc plate 9, applies a pulling force to the fixed component 2 and / or the arc plate 9, so that the fixed component 2 and the arc plate 9 rotate around the central axis of the rotating shaft 7 to a desired angle, and then the clamping member 11 is clamped with the clamping shaft 10 at the corresponding angle to fix the fixed component 2 at the desired angle. This structural design facilitates the adjustment of the angle of the fixed component 2.

[0029] Specifically, a plurality of clamping shafts 10 are arranged at equal angles on the arc plate 9. This structural design facilitates the operator to adjust the angle of the fixing assembly 2 at equal angles.

[0030] In this embodiment, a clamping groove 12 is provided at one end of the clamping part 11, and the clamping shaft 10 is clamped in the clamping groove 12; a screw hole is provided at the other end of the clamping part 11, and a locking bolt 13 is detachably connected to the threaded hole. The machine 1 is provided with a translation groove, and the screw rod of the locking bolt 13 passes through the translation groove and is threadedly connected to the threaded hole.

[0031] When it is necessary to adjust the angle of the fixing component 2, loosen the locking bolt 13 so that the clamping part 11 can move along the translation groove relative to the machine 1 until the clamping part 11 loosens the clamping shaft 10. At this time, the angle of the fixing component 2 can be adjusted. After the angle adjustment is completed, the clamping part 11 is clamped with the corresponding clamping shaft 10, and then tighten the locking bolt 13 so that the locking bolt 13 locks the clamping part 11 on the machine 1, so that the clamping part 11 can firmly clamp the clamping shaft 10.

[0032] Specifically, the machine 1 is provided with a guide cavity, which is connected to the translation groove, and one end of the clamping member 11 having a threaded hole is slidably connected to the inner wall of the guide cavity. When the clamping member 11 moves relative to the machine 1, the guide cavity guides the clamping member 11, thereby improving the stability of the movement of the clamping member 11.

[0033] Specifically, a handle 15 is installed at the top of the arc-shaped plate 9; in actual application, the operator can easily adjust the angle of the fixing component 2 by holding the handle, and the angle adjustment is easy and convenient.

[0034] Specifically, the side wall of the arc plate 9 is provided with a plurality of different angle marks, each angle mark being provided corresponding to a clamping shaft 10. The angle marks are provided for the operator to see, so that the operator can adjust the fixing assembly 2 to the desired angle quickly and accurately.

[0035] In this embodiment, the machine 1 is provided with a receiving space 17 for receiving the curved plate 9. The receiving space 17 can receive the curved plate 9, so that the curved plate 9 and the machine 1 have a compact structure and will not collide or interfere with each other.

[0036] In this embodiment, the fixing assembly 2 includes a bottom plate 18 and two locking plates 19 arranged in parallel. One end of the bottom plate 18 is rotatably connected to the machine 1 via a rotating shaft 7. The two locking plates 19 are detachably mounted on the top surface of the bottom plate 18. A tearing groove 6 is formed between the two locking plates 19. The tear-away carton is fixed between the top surface of the bottom plate 18 and the bottom surfaces of the two locking plates 19. This structural design realizes modular assembly of the fixing assembly 2, is convenient for assembly and disassembly, and is convenient for fixing the tear-away carton.

[0037] In this embodiment, the locking plate 19 is locked on the bottom plate 18 via the locking bolt 20. The locking plate 19 is provided with an adjustment slot 21. The screw of the locking bolt 20 passes through the adjustment slot 21 and is threadedly connected to the bottom plate 18. The adjustment slot 21 is used to adjust the distance between the two locking plates 19. In practical applications, according to different specifications of easy-tear cartons, the sizes of the easy-tear strips of the easy-tear cartons are different. By loosening the locking bolt 20, the locking plate 19 can be moved relative to the bottom plate 18 along the adjustment slot 21 to adjust the distance between the two locking plates 19, thereby adjusting the width of the tearing slot 6. After the adjustment is completed, the locking bolt 20 is tightened again to lock the locking plate 19 on the bottom plate 18.

[0038] In this embodiment, a telescopic support rod 22 is provided between the middle of the bottom surface of the fixed component 2 and the machine 1, one end of the telescopic support rod 22 is hinged to the middle of the bottom surface of the fixed component 2, and the other end of the telescopic support rod 22 is hinged to the machine 1. Specifically, the telescopic support rod 22 can be a pneumatic support rod. By adding the telescopic support rod 22, the telescopic support rod 22 can be telescoped according to the angle adjustment of the fixed component 2, and the fixed component 2 can be auxiliary supported without hindering the angle adjustment of the fixed component 2, so that the angle adjustment of the fixed component 2 is easier.

[0039] In this embodiment, the force sensor 4 is installed at the moving end of the oblique driving mechanism 3 via the lifting and adjusting mechanism 23, and the lifting and adjusting mechanism 23 is used to adjust the height of the force sensor 4 and the tearing clamp 5. In practical applications, the height of the force sensor 4 and the tearing clamp 5 is adjusted by the lifting and adjusting mechanism 23, which improves the flexibility of the tearing clamp 5 and facilitates the tearing clamp 5 to clamp the easy-tear strip of the easy-tear carton.

[0040] In this embodiment, the lifting adjustment mechanism 23 includes a lifting guide rod 24 installed on the moving end of the oblique driving mechanism 3, a lifting seat 25 slidably sleeved outside the lifting guide rod 24, and a locking member 26 for locking the lifting seat 25 on the lifting guide rod 24, and the force sensor 4 is installed on the lifting seat 25.

[0041] In actual application, when the height of the tearing clamp 5 needs to be adjusted, the locking piece 26 is loosened so that the lifting seat 25 can be lifted and slid relative to the lifting guide rod 24 to adjust the height of the tearing clamp 5. After the adjustment is completed, the locking piece 26 locks the lifting seat 25 on the lifting guide rod 24 to maintain the height of the tearing clamp 5.

[0042] Specifically, the locking member 26 is a latch, a plurality of height adjustment holes 27 are provided in the length direction of the lifting guide rod 24, the lifting seat 25 is provided with a plug hole connected with the height adjustment hole 27, and the locking member 26 is detachably inserted into the plug hole and the corresponding height adjustment hole 27. When adjusting the height of the tearing clamp 5, the lifting seat 25 is lifted and slid relative to the lifting guide rod 24. When adjusted to a desired height position, the plug hole of the lifting seat 25 is coaxially connected with the height adjustment hole 27 at the corresponding height position, and then the latch is inserted into the plug hole and the height adjustment hole 27 to lock the lifting seat 25 and the lifting guide rod 24 together.

[0043] Specifically, the tensile test device for simulating human hand tearing of an easy-tear paper box further includes a control box 29, and the oblique drive mechanism 3 and the force sensor 4 are both electrically connected to the control box 29. The control box 29 is used to adjust parameters such as the driving speed and driving force of the oblique drive mechanism 3, and the tearing force monitored by the force sensor 4 is displayed on a display screen of the control box 29 and stored in the control box 29.

[0044] Specifically, the top surface of the machine 1 is provided with a first column 30 and a second column 31, the height of the first column 30 is less than the height of the second column 31, the two ends of the oblique drive mechanism 3 are respectively provided on the first column 30 and the second column 31, and the fixing assembly 2 is located between the first column 30 and the second column 31. This structural design facilitates the oblique drive mechanism 3 to be obliquely installed on the machine 1. Specifically, the oblique drive mechanism 3 has an inclination angle of 15° to 85°.

[0045] All technical features in this embodiment can be freely combined according to actual needs.

[0046] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A tensile test device for simulating human hands tearing an easy-tear paper box, characterized in that: The invention comprises a machine platform (1), a fixing component (2) arranged on the table of the machine platform (1) and used to fix an easy-tear carton, an oblique drive mechanism (3) obliquely installed on the machine platform (1) and located above the fixing component (2), a force sensor (4) installed at the moving end of the oblique drive mechanism (3), and a tearing clamp (5) installed at the input end of the force sensor (4); a tearing groove (6) is arranged on the top surface of the fixing component (2); when the easy-tear carton is fixed by the fixing component (2), the easy-tear strip of the easy-tear carton is exposed in the tearing groove (6).

2. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 1, characterized in that: One end of the fixed component (2) is rotatably connected to the machine platform (1) via a rotating shaft (7); the rotating shaft (7) is arranged close to the bottom end of the oblique drive mechanism (3); an angle adjustment mechanism (8) is arranged between the other end of the fixed component (2) and the machine platform (1); the angle adjustment mechanism (8) is used to adjust the angle of the fixed component (2).

3. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 2, characterized in that: The angle adjustment mechanism (8) comprises an arc-shaped plate (9) mounted on the end of the fixing assembly (2), a plurality of clamping shafts (10) arranged on the arc-shaped plate (9) along the arc line of the arc-shaped plate (9), and a clamping member (11) detachably connected to the machine platform (1), wherein the clamping member (11) is used to clamp one of the clamping shafts (10).

4. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 3, characterized in that: One end of the clamping piece (11) is provided with a clamping groove (12), and the clamping shaft (10) is clamped in the clamping groove (12); the other end of the clamping piece (11) is provided with a screw hole, and the screw hole is detachably connected to a locking bolt (13); the machine platform (1) is provided with a translation groove, and the screw rod of the locking bolt (13) passes through the translation groove and is threadedly connected to the threaded hole.

5. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 3, characterized in that: The machine platform (1) is provided with a receiving space (17) for receiving the arc-shaped plate (9).

6. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 2, characterized in that: The fixing assembly (2) comprises a bottom plate (18) and two locking plates (19) arranged in parallel. One end of the bottom plate (18) is rotatably connected to the machine (1) via a rotating shaft (7). The two locking plates (19) are detachably mounted on the top surface of the bottom plate (18). A tearing groove (6) is formed between the two locking plates (19). The tearable carton is fixed between the top surface of the bottom plate (18) and the bottom surfaces of the two locking plates (19).

7. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 6, characterized in that: The locking plate (19) is locked on the base plate (18) via a locking bolt (20). The locking plate (19) is provided with an adjustment slot (21). The screw of the locking bolt (20) passes through the adjustment slot (21) and is threadedly connected to the base plate (18). The adjustment slot (21) is used to adjust the distance between the two locking plates (19).

8. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 2 or 6, characterized in that: A telescopic support rod (22) is provided between the middle of the bottom surface of the fixed component (2) and the machine platform (1); one end of the telescopic support rod (22) is hinged to the middle of the bottom surface of the fixed component (2), and the other end of the telescopic support rod (22) is hinged to the machine platform (1).

9. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 1, characterized in that: The force sensor (4) is installed at the moving end of the oblique driving mechanism (3) via a lifting and adjusting mechanism (23), and the lifting and adjusting mechanism (23) is used to adjust the height of the force sensor (4) and the tearing clamp (5).

10. The tensile test device for simulating human hand tearing of an easy-tear paper box according to claim 9, characterized in that: The lifting adjustment mechanism (23) comprises a lifting guide rod (24) mounted on the moving end of the oblique driving mechanism (3), a lifting seat (25) slidably sleeved outside the lifting guide rod (24), and a locking member (26) for locking the lifting seat (25) to the lifting guide rod (24), and a force sensor (4) is mounted on the lifting seat (25).

Images