Packing bag falling test device

Abstract

The invention provides a packaging bag falling test device, and relates to the technical field of packaging bag quality detection devices.The packaging bag falling test device comprises a rack and further comprises a lifting mechanism, the lifting mechanism comprises a lifting frame arranged on the rack in a sliding mode, and a first driving source capable of driving the lifting frame to slide is fixed to one side of the rack; a bag clamping mechanism is further arranged at the bottom of the lifting frame and comprises a pair of clamping arms arranged at the bottom of the lifting frame in a relatively rotating mode, clamping plates are arranged on the opposite sides of the two clamping arms, a first clamping part and a second clamping part are fixedly arranged on the clamping sides of the clamping plates, the clamping face of the first clamping part is a plane and is arranged at the top or the bottom of the clamping side, and the clamping face of the second clamping part is arranged at the bottom or the top of the clamping side. The problems that in an existing device, the falling posture and the landing direction of a packaging bag are single, accurate control is difficult, deviation or rotation is likely to happen in the falling process, and the packaging bag is prone to falling off are solved. And the test accuracy is influenced.

Description

Technical Field

[0001] This invention relates to the technical field of packaging bag quality inspection devices, and more particularly to a packaging bag drop test device. Background Technology

[0002] Woven bags are a common packaging material for industrial and agricultural products. They need to withstand drop impacts during actual storage and transportation. Therefore, drop performance testing is an important test item for evaluating whether their quality is up to standard.

[0003] Traditional testing methods mainly rely on manual operation. Operators need to repeatedly carry heavy packaging bags to a designated height and throw them. This method not only consumes a lot of human resources and has low testing efficiency, but also makes it difficult to accurately control the drop height, the initial posture of the packaging bag, and the force state at the moment of release. As a result, the test results are easily affected by human factors, lack repeatability and scientific rigor, and cannot provide a scientific and reliable basis for evaluating product quality.

[0004] Some existing testing methods also employ drop test devices, such as the "Plastic Woven Bag Drop Test Device" disclosed in Chinese Invention Patent Publication No. CN109142099A. This device uses two lifting machines to alternately lift and release the packaging bag, which reduces the intensity of manual labor and improves testing efficiency to some extent. However, the release method of this device relies on the packaging bag sliding on the inclined push plate. Its drop posture and landing direction are relatively simple and difficult to control precisely, and it cannot simulate the diverse drop conditions in actual transportation. Another example is the "New Type of Heavy Packaging Bag Drop Test Machine" disclosed in Chinese Invention Patent Publication No. CN121068383A. Although it achieves flexible switching between flat drop and vertical drop tests through adjustable vertical components and can adapt to packaging bags of different sizes, when conducting vertical drop tests, the guide rollers used to clamp and fix the packaging bag and the bottom support structure may still interfere or rub against the packaging bag at the moment of release, causing the packaging bag to deviate or rotate unexpectedly when falling, affecting the accuracy of the test of the packaging bag's drop state and landing angle. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a packaging bag drop test device, which solves the problems of the packaging bag's drop posture and landing direction being relatively simple in existing devices, making it difficult to control precisely, and easily interfering with or rubbing against fixed or supporting structures, causing deviation or rotation during drop, thus affecting the accuracy of the test.

[0006] According to an embodiment of the present invention, a packaging bag drop test device includes a frame and further includes:

[0007] A lifting mechanism includes a lifting frame that is slidably mounted on a frame, and a first driving source that can drive the lifting frame to slide is fixed on one side of the frame.

[0008] The clamping mechanism includes a pair of clamping arms that are rotatably disposed at the bottom of the lifting frame. A clamping plate is disposed on one side of the two clamping arms. A first clamping part and a second clamping part are fixedly disposed on the clamping side of the clamping plate. The clamping surface of the first clamping part is flat and is disposed at the top or bottom of the clamping side. The clamping surface of the second clamping part is a horizontal concave arc surface and is disposed in the middle of the clamping side.

[0009] The second drive source is fixedly mounted on the lifting frame and can drive the two clamping arms to rotate relative to each other.

[0010] The technical principle of this invention is as follows: In use, the first drive source drives the lifting frame to slide on the frame, causing the bag clamping mechanism to descend to ground height. Subsequently, the second drive source drives the two clamping arms to rotate relative to each other, causing the two clamping plates to move closer together. Depending on the drop posture required for the test, the packaging bag placed on the ground is clamped by either the first clamping part or the second clamping part. When a vertical drop test is required, the first clamping part on the two clamping plates clamps the upper and lower sides of the packaging bag to achieve a stable vertical fixation. When a horizontal drop test is required, the second clamping part on the two clamping plates wraps around and clamps the left and right sides of the packaging bag to achieve a stable horizontal fixation. After clamping is completed, the first drive source drives the lifting frame to rise to the preset test height, and the second drive source drives the two clamping arms to rotate in the opposite direction. The two clamping plates open instantly, and the packaging bag falls freely in the preset posture under the action of gravity, completing the test.

[0011] Furthermore, the clamping side of the second clamping part is elastically telescopically provided with a top clamping block, and the clamping side of the top clamping block is provided with a top clamping surface that matches the curvature of the second clamping part.

[0012] Furthermore, the second clamping part has a telescopic groove fixedly provided on the clamping side, the top holding block is slidably disposed in the telescopic groove, a spring is fixedly provided at the bottom of the telescopic groove, and the top of the spring is fixedly connected to the top holding block.

[0013] Furthermore, the clamping arm includes a rotating shaft rotatably connected to the lifting frame, a pair of arm plates fixedly disposed at both ends of the rotating shaft, and several connecting rods fixedly disposed between the two arm plates. The two arm plates are arranged relatively parallel to each other, and an mounting plate is detachably fixedly disposed at the bottom of the arm plate. The mounting plate is slidably connected to the clamping plate.

[0014] Furthermore, the mounting plate is provided with an adjustment groove on the clamping side, and a plurality of adjustment sliders are slidably disposed in the adjustment groove, each adjustment slider being fixedly connected to a clamping plate.

[0015] Furthermore, a limiting groove communicating with the adjusting slide is provided on one side of the mounting plate, and a locking screw is threadedly connected to the adjusting slider. The locking screw passes through the limiting groove and a locking part is provided on the outside of the groove. The locking part can press against the limiting groove when the locking screw is screwed in.

[0016] Furthermore, a third clamping part is fixedly provided at both ends of the clamping side of the clamping plate. The clamping surface of the third clamping part is a vertical concave arc surface and smoothly transitions with the first clamping part and the second clamping part.

[0017] Furthermore, flexible pads are fixedly provided on the clamping sides of the first clamping part, the second clamping part, and the third clamping part.

[0018] Furthermore, sliding plates are fixedly installed on both sides of the frame, and lifting sliders that can slide longitudinally on the sliding plates are fixedly installed on both sides of the lifting frame. The first driving source includes a motor, which is fixedly installed on the top or side of the frame. A lead screw is fixedly connected to the output end of the motor, and the lifting slider meshes with the lead screw.

[0019] Furthermore, the second driving source includes a cylinder, with a connecting plate fixedly mounted on the output end of the cylinder, and a pair of rockers rotatably mounted on the connecting plate, the ends of which are respectively rotatably connected to two clamping arms.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting a pair of clamping arms that rotate relative to each other, and driving them to rotate through a second drive source, when released, the two clamping arms rotate in opposite directions, causing the clamping plate to open instantly, so that there is no relative slippage or friction interference between the packaging bag and the clamping plate, thus ensuring the initial posture of the packaging bag and the force state at the moment of release.

[0022] 2. By setting the clamping surface of the first clamping part as a plane and placing it at the top or bottom of the clamping side, when the two clamping arms rotate relative to each other, the two planes set opposite to each other clamp the packaging bag from the top and bottom directions respectively. The vertical fixation of the packaging bag is achieved by using the linear contact or surface contact between the plane and the upper and lower edges of the packaging bag. The clamping position is clear and the force is uniform, so that the falling posture of the packaging bag can be precisely controlled.

[0023] 3. By setting the clamping surface of the second clamping part as a horizontal concave arc surface and placing it in the middle of the clamping side, when the two clamping arms rotate relative to each other, the two arc surfaces set opposite to each other wrap around the middle area of ​​the packaging bag from the left and right sides respectively. The horizontal fixation is achieved by using the contour fit between the arc surface and the side of the packaging bag. The wrapping structure provides stable support when clamping and ensures that the packaging bag falls in a horizontal posture when released. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0025] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0026] Figure 3 This is a schematic diagram of the assembly structure of the lifting mechanism and the clamping mechanism according to an embodiment of the present invention.

[0027] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B.

[0028] Figure 5 This is a schematic diagram of the overall structure of the bag clamping mechanism according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the assembly structure of the clamping arm and clamping plate according to an embodiment of the present invention.

[0030] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C.

[0031] Figure 8 This is a schematic diagram of the clamping plate assembly structure according to an embodiment of the present invention.

[0032] In the above figures: 1. Frame; 11. Sliding plate; 111. Lifting slide; 112. Height gauge; 12. First drive source; 13. Lead screw; 2. Lifting mechanism; 21. Lifting frame; 22. Lifting slider; 221. Height indicator; 23. Threaded hole; 24. Second drive source; 25. Connecting plate; 26. Rocker arm; 3. Clamping mechanism; 31. Clamping arm; 311. Rotating shaft; 312. Arm plate; 313. Connecting rod; 32. Mounting plate; 321. Adjusting plate; 322. Adjusting hole; 33. Adjusting slide; 331. Sliding rod; 34. Limiting groove; 4. Clamping plate; 41. First clamping part; 42. Second clamping part; 421. Top holding block; 422. Telescopic groove; 423. Spring; 43. Third clamping part; 44. Adjusting slider; 45. Locking screw; 451. Locking part. Detailed Implementation

[0033] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1-8 As shown in the figure, the present invention provides a packaging bag drop test device, which includes a frame 1. The frame 1 serves as the main support structure of the entire device and is preferably made of steel and connected by welding or bolts to ensure that it has sufficient structural strength and stability to bear the load generated during the entire test process.

[0035] In this exemplary embodiment, the device further includes a lifting mechanism 2, which is used to adjust the test height. The lifting mechanism 2 includes a lifting frame 21 that is slidably mounted on the frame 1. Specifically, the lifting frame 21 can be slidably mounted on one side of the column of the frame 1 via a linear guide rail or similar guide assembly to ensure that the lifting process is smooth or without shaking. A first drive source 12 that can drive the lifting frame 21 to slide is fixed on one side of the frame 1. The output end of the first drive source 12 can be connected to the lifting frame 21 via a transmission chain, a synchronous belt or a lead screw 13 nut mechanism, so as to accurately and reliably drive the lifting frame 21 to reciprocate vertically along the frame 1 to position the clamping mechanism 3 to the preset drop test height.

[0036] In this exemplary embodiment, the device further includes a bag clamping mechanism 3, which performs bag clamping and releasing actions. The bag clamping mechanism 3 includes a pair of clamping arms 31 rotatably mounted on the bottom of the lifting frame 21. The top ends of the clamping arms 31 are rotatably mounted on the bottom crossbeam of the lifting frame 21 via a pivot or hinge, allowing the two clamping arms 31 to open and close like jaws. Clamping plates 4 are provided on the inner sides of the two clamping arms 31, with the opposing sides of the clamping plates 4 being the clamping sides. A first clamping part 41 and a second clamping part 42 are fixedly provided on the clamping sides of the clamping plates 4. The clamping surface of the first clamping part 41 is flat and located in the top or bottom area of ​​the clamping side, suitable for clamping the flat edge or surface of the packaging bag. The clamping surface of the second clamping part 42 is a horizontal concave arc surface and located in the middle of the clamping side. The concave arc surface can better fit and contain the arc-shaped side of the packaging bag in the full state, thereby achieving stable and adaptive clamping of packaging bags of different shapes. The size and area of ​​the first clamping part 41 and the second clamping part 42 can be flexibly set according to the actual situation of the test packaging bag, so that the clamping plate 4 can adapt to the clamping requirements of packaging bags of different specifications, increasing the applicability of this device.

[0037] In this exemplary embodiment, the device also includes a second drive source 24, which is fixedly mounted on the lifting frame 21. Its output end can be connected to the two clamping arms 31 via a linkage, gear rack or cam mechanism. When the second drive source 24 is started, it can drive the two clamping arms 31 to rotate synchronously in opposite directions, so that the clamping plate 4 can be quickly and conveniently clamped and fixed with the packaging bag or detached instantly, ensuring the purity of the initial state of the drop and the accuracy of the test results.

[0038] The technical principle of this invention is as follows: In use, the first drive source 12 drives the lifting frame 21 to slide on the frame 1, causing the bag clamping mechanism 3 to descend to ground height. Subsequently, the second drive source 24 drives the two clamping arms 31 to rotate relative to each other, causing the two clamping plates 4 to move closer to each other. Depending on the drop posture required for the test, the packaging bag placed on the ground is clamped by either the first clamping part 41 or the second clamping part 42. When a vertical drop test is required, the first clamping part 41 on the two clamping plates 4 clamps the upper and lower sides of the packaging bag to achieve a stable vertical fixation. When a horizontal drop test is required, the second clamping part 42 on the two clamping plates 4 wraps around and clamps the left and right sides of the packaging bag to achieve a stable horizontal fixation. After clamping is completed, the first drive source 12 drives the lifting frame 21 to rise to the preset test height, and the second drive source 24 drives the two clamping arms 31 to rotate in the opposite direction. The two clamping plates 4 open instantly, and the packaging bag falls freely in the preset posture under the action of gravity, completing the test.

[0039] This invention features a pair of relatively rotating clamping arms 31, driven by a second driving source 24. Upon release, the two clamping arms 31 rotate in opposite directions, causing the clamping plate 4 to open instantaneously, eliminating relative slippage and frictional interference between the packaging bag and the clamping plate 4. This ensures the initial posture of the packaging bag and its stress state at the moment of release. By setting the clamping surface of the first clamping part 41 as a plane and placing it at the top or bottom of the clamping side, when the two clamping arms 31 rotate relative to each other, the two opposing planes clamp the packaging bag from above and below, utilizing the plane and the packaging bag... The linear or surface contact of the upper and lower edges achieves vertical fixation of the packaging bag, with a clear clamping position and uniform force, allowing for precise control of the packaging bag's falling posture. Furthermore, by setting the clamping surface of the second clamping part 42 as a horizontal concave arc surface and placing it in the middle of the clamping side, when the two clamping arms 31 rotate relative to each other, the two opposing arc surfaces wrap around the middle area of ​​the packaging bag from the left and right sides respectively. The lateral fixation is achieved by using the contour fit between the arc surface and the side of the packaging bag. The wrapping structure provides stable support during clamping and ensures that the packaging bag falls in a horizontal posture during release.

[0040] like Figure 1 and Figure 4-8As shown, according to another embodiment, the second clamping part 42 is elastically telescopically provided with a top holding block 421 on the clamping side. Specifically, the second clamping part 42 is fixedly provided with a telescopic groove 422 on the clamping side, the telescopic groove 422 extends inward in the horizontal direction, the top holding block 421 is slidably disposed in the telescopic groove 422, the outer surface of the top holding block 421 is set as the top holding surface, the top holding surface has an arc-shaped concave structure consistent with the clamping surface of the second clamping part 42; a spring 423 is provided between the bottom of the telescopic groove 422 and the top holding block 421, one end of the spring 423 is fixedly abutted against the bottom of the telescopic groove 422, and the other end is fixedly abutted against the inner end face of the top holding block 421, so that the top holding block 421 protrudes from the clamping surface of the second clamping part 42 in its natural state; based on the above configuration, when a vertical drop test is performed, the top holding block 421 remains in the ejected state under the action of the spring 423, and its top holding surface Together with the planar clamping surface of the first clamping part 41, it forms a multi-point clamping of the packaging bag, effectively increasing the clamping contact area and improving clamping stability. When a horizontal drop test is performed, the top clamping block 421 overcomes the elastic force of the spring 423 and retracts into the telescopic groove 422. The elastic characteristics of the spring 423 provide cushioning for the edge of the packaging bag, avoiding slippage or damage caused by rigid clamping. At the same time, the top clamping surface remains in contact with the packaging bag, further improving clamping stability. It should be noted that a damping device should also be set at the spring 423 according to the actual situation to provide damping force when the spring 423 extends, so as to limit the pop-out speed of the top clamping block 421, ensure that the top clamping block 421 returns to its original position smoothly, and avoid the top clamping block 421 popping out instantly under the restoring force of the spring 423 when the packaging bag is released, which would cause impact or disturbance to the surface of the packaging bag, further improving the stability and reliability of the test process.

[0041] like Figure 1 and Figure 3-6As shown, according to another embodiment, the clamping arm 31 includes a rotating shaft 311, a pair of arm plates 312, and several connecting rods 313. A rotating seat is fixedly installed at the bottom of the lifting frame 21. The rotating shaft 311 is rotatably installed within the rotating seat. The two arm plates 312 are respectively fixedly installed at both ends of the rotating shaft 311 and extend parallel to each other. Each connecting rod 313 is fixedly connected between the two arm plates 312 to enhance the connection stability between the two arm plates 312 and improve the overall rigidity of the clamping arm 31. A mounting plate 32 is detachably fixedly installed at the bottom of the arm plate 312. Specifically, the back of the mounting plate 32... An adjusting plate 321 is fixedly connected, and multiple adjusting holes 322 are arranged horizontally on the adjusting plate 321. The adjusting holes 322 are oblong holes that extend horizontally. A corresponding connecting hole is opened at the bottom of the arm plate 312. The arm plate 312 and the mounting plate 32 can be fixedly connected by bolts passing through the connecting hole and the adjusting hole 322 simultaneously. Based on the above settings, by selecting different adjusting holes 322 and connecting holes for alignment and connection, the relative fixed position between the arm plate 312 and the mounting plate 32 can be changed, thereby adjusting the distance between the two mounting plates 32 to meet the clamping requirements of packaging bags of different sizes and improve the applicability of this device.

[0042] In this embodiment, the mounting plate 32 extends along the connection direction of the two arm plates 312 and is slidably connected to the clamping plate 4. Specifically, the mounting plate 32 has an adjusting groove 33 on the side facing the clamping side, and a plurality of adjusting sliders 44 are slidably disposed in the adjusting groove 33. Each adjusting slider 44 is fixedly connected to a clamping plate 4, and the number of clamping plates 4 can be flexibly increased or decreased according to actual testing needs. Based on the above configuration, by setting multiple adjusting sliders 44, the function of simultaneously clamping and testing multiple packaging bags can be realized, and the function of simultaneously clamping and testing multiple packaging bags can be realized by adjusting the sliders 44. The movable adjusting slider 44 can change the relative position of each clamping plate 4 on the mounting plate 32, so that the clamping plate 4 can be adjusted according to the size, shape and clamping point requirements of the packaging bag, thereby adapting to more diverse clamping needs; at the same time, a sliding rod 331 can be selectively fixed in the adjusting groove 33 along its extension direction, and a through hole is opened on the adjusting slider 44 for the sliding rod 331 to pass through. The sliding rod 331 slides with the through hole and plays a guiding role when the adjusting slider 44 moves, further enhancing the stability of the adjusting slider 44 during the sliding process.

[0043] In this embodiment, the mounting plate 32 is further provided with a limiting groove 34 communicating with the adjusting slide 33 on one side. The limiting groove 34 is provided along the extending direction of the adjusting slide 33. The adjusting slider 44 is threadedly connected to a locking screw 45. The locking screw 45 passes through the limiting groove 34 and is provided with a locking part 451 on the outside of the groove. The locking part 451 can press against the limiting groove 34 when the locking screw 45 is screwed in, thereby locking the adjusting slider 44 in a predetermined position within the adjusting slide 33, realizing the rapid positioning and reliable fixing of the clamping plate 4. In some other embodiments, the adjusting slider 44 and the mounting plate 32 can also be locked and fixed by conventional locking components such as pins or buckles, which is not limited here.

[0044] like Figure 1 and Figure 4-8 As shown, according to another embodiment, the clamping plates 4 are further fixedly provided with third clamping parts 43 at both ends of the clamping side. The clamping surface of the third clamping part 43 is a vertical concave arc surface and smoothly transitions with the clamping surfaces of the first clamping part 41 and the second clamping part 42. When multiple clamping plates 4 are provided on the same mounting plate 32, the third clamping parts 43 on the opposite side of the adjacent clamping plates 4 correspond to each other and together form a complete semi-circular or semi-arc surface structure. This semi-circular or semi-arc surface allows the sides or corners of the packaging bag to be embedded and clamped in a vertical posture. Thus, while maintaining the original planar and horizontal arc surface clamping methods, it further meets the testing requirements of multi-angle clamping of packaging bags and improves the diversity and adaptability of clamping.

[0045] like Figure 1 and Figure 4-8 As shown, in this embodiment, flexible pads are fixedly provided on the clamping sides of the first clamping part 41, the second clamping part 42, and the third clamping part 43. Specifically, the flexible pads can be made of rubber, silicone, polyurethane, or other elastic materials with appropriate elasticity and coefficient of friction. They can be attached to the clamping surface of each clamping part by means of embedding, bonding, or fastener connection. The flexible pads are in direct contact with the packaging bag during clamping, which can increase the coefficient of friction of the clamping surface to prevent the packaging bag from slipping during the test, and also play a buffering and protective role for the surface of the packaging bag, avoiding damage to the packaging bag caused by rigid clamping. At the same time, the deformable characteristics of the flexible pads allow them to adapt to the contour changes of different clamping surfaces, further improving the fit and stability of clamping. In some other embodiments, the surface of the flexible pads can also be provided with a plurality of anti-slip ridges in an array. The anti-slip ridges extend along the clamping direction or in an intersecting direction to increase the coefficient of friction with the surface of the packaging bag during clamping, preventing the packaging bag from slipping during the test.

[0046] like Figure 1-3As shown, according to another embodiment, sliding plates 11 are fixedly arranged on both sides of the frame 1, and a longitudinally extending lifting groove 111 is provided in the middle of the sliding plate 11. Lifting sliders 22 are fixedly arranged on both sides of the lifting frame 21. The lifting sliders 22 slide and move longitudinally along the lifting groove 111. The first driving source 12 includes a motor, which is fixedly arranged on the top or one side of the frame 1. A lead screw 13 is fixedly connected to the output end of the motor. The lead screw 13 rotates along the length of the sliding plate 11 and passes through the lifting groove 111. The lifting slider 22 has an opening on it. There is a threaded hole 23 that mates with the lead screw 13, and the lead screw 13 engages with the threaded hole 23 for transmission. In addition, a height gauge 112 is provided on one side of the sliding plate 11 in the vertical direction, and a height mark 221 pointing to the height gauge 112 is provided on one side of the lifting slider 22. The zero point of the scale of the height gauge 112 corresponds to the reference height of the clamping position of the clamping arm 31, so that the scale value indicated by the height mark 221 is the current actual clamping height of the clamping arm 31, thereby enabling the operator to intuitively read the clamping height and improve the convenience of using the device.

[0047] like Figure 3-6 As shown, according to another embodiment, the second driving source 24 includes a cylinder whose output end extends and retracts vertically downwards. A connecting plate 25 is fixedly provided, and hinge shafts are respectively provided on the left and right sides of the connecting plate 25. The two hinge shafts are symmetrically arranged and each is rotatably provided with a rocker arm 26. One end of the rocker arm 26 is rotatably engaged with the hinge shaft, and the other end of the rocker arm 26 is provided with a sleeve hole, which is rotatably sleeved on one of the connecting rods 313 of the clamping arm 31 on the same side. When the cylinder drives the connecting plate 25 to move, the two rocker arms 26 move synchronously with the connecting plate 25, pushing and pulling the connecting rods 313 on the two clamping arms 31 respectively, so that the two clamping arms 31 rotate synchronously towards or away from each other around their respective rotation axes 311, thereby realizing the clamping and releasing action.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A packaging bag drop test device, comprising a frame (1), characterized in that, Also includes: The lifting mechanism (2) includes a lifting frame (21) slidably mounted on the frame (1), and a first driving source (12) that can drive the lifting frame (21) to slide is fixed on one side of the frame (1). The clamping mechanism (3) includes a pair of clamping arms (31) that are rotatably disposed at the bottom of the lifting frame (21). A clamping plate (4) is provided on the opposite side of the two clamping arms (31). A first clamping part (41) and a second clamping part (42) are fixedly provided on the clamping side of the clamping plate (4). The clamping surface of the first clamping part (41) is flat and is disposed at the top or bottom of the clamping side. The clamping surface of the second clamping part (42) is a horizontal concave arc surface and is disposed in the middle of the clamping side. The second drive source (24) is fixedly mounted on the lifting frame (21) and can drive the two clamping arms (31) to rotate relative to each other.

2. The packaging bag drop test device as described in claim 1, characterized in that: The second clamping part (42) has a top holding block (421) that is elastically telescopically provided on the clamping side, and the clamping side of the top holding block (421) has a top holding surface that is consistent with the curvature of the second clamping part (42).

3. The packaging bag drop test device as described in claim 2, characterized in that: The second clamping part (42) has a telescopic groove (422) fixedly provided on the clamping side, and the top holding block (421) is slidably disposed in the telescopic groove (422). A spring (423) is fixedly provided at the bottom of the telescopic groove (422), and the top end of the spring (423) is fixedly connected to the top holding block (421).

4. The packaging bag drop test device as described in claim 1, characterized in that: The clamping arm (31) includes a rotating shaft (311) rotatably connected to the lifting frame (21), a pair of arm plates (312) fixedly disposed at both ends of the rotating shaft (311), and a number of connecting rods (313) fixedly disposed between the two arm plates (312). The two arm plates (312) are arranged in parallel relative to each other. The bottom of the arm plate (312) is detachably fixedly provided with an mounting plate (32), and the mounting plate (32) is slidably connected to the clamping plate (4).

5. The packaging bag drop test device as described in claim 4, characterized in that: The mounting plate (32) is provided with an adjustment groove (33) on the clamping side. Several adjustment sliders (44) are slidably arranged in the adjustment groove (33). Each adjustment slider (44) is fixedly connected to a clamping plate (4).

6. The packaging bag drop test device as described in claim 5, characterized in that: The mounting plate (32) has a limiting groove (34) that connects to the adjusting slide (33) on one side. The adjusting slider (44) is threadedly connected to a locking screw (45). The locking screw (45) passes through the limiting groove (34) and has a locking part (451) on the outside of the groove. The locking part (451) can press against the limiting groove (34) when the locking screw (45) is screwed in.

7. The packaging bag drop test device as described in claim 4, characterized in that: The clamping plate (4) is also fixedly provided with a third clamping part (43) at both ends of the clamping side. The clamping surface of the third clamping part (43) is a vertical concave arc surface and smoothly transitions with the first clamping part (41) and the second clamping part (42).

8. The packaging bag drop test device as described in claim 7, characterized in that: Flexible pads are fixedly provided on the clamping sides of the first clamping part (41), the second clamping part (42) and the third clamping part (43).

9. The packaging bag drop test device as described in claim 1, characterized in that: The frame (1) is fixedly provided with sliding plates (11) on both sides, and the lifting frame (21) is fixedly provided with lifting sliders (22) that can slide longitudinally on the sliding plates (11) on both sides. The first drive source (12) includes a motor, which is fixedly provided on the top or side of the frame (1). The output end of the motor is fixedly connected to a lead screw (13), and the lifting slider (22) meshes with the lead screw (13).

10. The packaging bag drop test device as described in claim 1, characterized in that: The second drive source (24) includes a cylinder, and a connecting plate (25) is fixedly provided at the output end of the cylinder. A pair of rockers (26) are rotatably provided on the connecting plate (25), and the ends of the two rockers (26) are rotatably connected to the two clamping arms (31) respectively.

Images