A corrugated paper bonding strength testing device

Abstract

This application relates to a corrugated paper bonding strength testing device, including a main support frame, a pressing device, multiple long needles, and multiple short needles. The main support frame includes a first frame and a second frame. Multiple first sliders are slidably connected to the first frame. The long needles are slidably connected to the corresponding first sliders along a sliding direction parallel to the second frame. A first locking member is used to lock the position of the long needles on the main support frame. The pressing device includes a frame and multiple second sliders. The second sliders are slidably connected to the frame. A second locking member is used to lock the position of the second sliders on the frame. The second sliders have needle grooves for receiving short needles. A third locking member is used to lock the short needles in the corresponding needle grooves. After the test, the long needles are locked to the main support frame by the first locking member, while the short needles can be stored in the needle grooves and locked by the third locking member. Finally, the entire pressing device can be stored in a receiving cavity. The entire testing device is integrated into a single unit, making it less likely for any parts to be lost during storage.

Description

Technical Field

[0001] This application relates to the field of corrugated cardboard quality testing devices, and more particularly to a corrugated paper adhesive strength testing device. Background Technology

[0002] The bonding strength of corrugated cardboard is an important indicator for testing the physical strength of corrugated boxes. It reflects the bond strength between the cardboard surface and the base paper of a certain length of corrugated cardboard. Whether the bond is tight and strong, and whether the strength meets requirements, directly affects the performance of the corrugated cardboard. If the cardboard is not bonded firmly, the produced corrugated boxes will lack strength, and the layers will easily peel off during use. This directly leads to a decrease in the shock and compressive strength of the finished boxes, making them prone to damage during stacking and transportation, resulting in economic losses.

[0003] Related technologies for corrugated cardboard bonding strength testing devices, such as Figure 1 As shown, the device includes a main support frame 1, multiple long needles 13, multiple short needles 14, and a pressing device 2. The top surface of the main support frame 1 has an opening slot 19 for accommodating the short needles 14. The width of the opening slot 19 is greater than the length of the short needles 14 but less than the length of the long needles 13. Both the long needles 13 and the short needles 14 are inserted into the corrugated holes 31 of the corrugated cardboard 3. The multiple long needles 13 and the multiple short needles 14 are spaced apart, with adjacent long needles 13 and short needles 14 inserted into adjacent corrugated holes 31. The long needles 13 are then placed on the top surface of the main support frame 1. The two ends of the long needle 13 are located on both sides of the opening groove 19, and the projection of the short needle 14 in the opening groove 19 is completely located in the opening groove 19. The pressing device 2 includes a main block 224 and multiple sets of sub-blocks 221. The multiple sets of sub-blocks 221 are distributed sequentially on the main block 224 along the length direction of the main block 224. Each set of sub-blocks 221 includes two sub-blocks 221. The two sub-blocks 221 are used to abut against the two ends of the same short needle 14. The distance between the sub-blocks 221 of different pressing devices 2 and the distance between the sub-blocks 221 of different sets are different.

[0004] The operator selects a suitable pressing device and places it on the short needles, ensuring that both ends of each short needle protruding from the corrugated cardboard are abutted by the corresponding sub-block, while the sub-block does not contact the long needles. Then, the above-mentioned testing device is moved to the compression test machine, and force is applied to the pressing device. The pressing device presses down the short needles and moves them down, separating the different layers of the corrugated cardboard. Finally, the value of the corrugated paper bonding strength is measured.

[0005] The above-mentioned technical solutions have the following drawbacks: since almost all experimental parts are independent, it is easy for parts to be lost when storing and preserving them. Summary of the Invention

[0006] To address the issue of easily lost components during storage in corrugated cardboard bonding strength testing devices, this application provides a corrugated cardboard bonding strength testing device.

[0007] The corrugated paper bonding strength testing device provided in this application adopts the following technical solution:

[0008] A corrugated paper bonding strength testing device includes a main support frame, a pressing device, multiple long needles and multiple short needles, and also includes a first locking member, a second locking member and a third locking member. The main support frame includes a first frame and a second frame with an L-shaped vertical cross section. The second frame is slidably connected to the first frame. A receiving cavity for the pressing device to move is formed between the first frame and the second frame. Multiple first sliders are slidably connected to the first frame along a horizontal sliding direction perpendicular to the second frame. The multiple long needles correspond to the multiple first sliders respectively. The long needles are slidably connected to the corresponding first sliders along a sliding direction parallel to the second frame. The first locking member is used to lock the position of the long needles on the main support frame. The long needles are used to insert into the flute holes of the corrugated paperboard. The end of the long needle near the second frame can abut against the top surface of the second frame.

[0009] The pressing device includes a frame and multiple second sliders. When the frame is located in the receiving cavity, the frame is detachably connected to the second frame. The second sliders are slidably connected to the frame along a sliding direction parallel to the first slider. The second locking member is used to lock the position of the second sliders on the frame. Two auxiliary blocks for pressing the two ends of the short needles are fixed on the bottom wall of the second slider. A needle groove for accommodating the short needles is opened on one end wall of the second slider. Multiple needle grooves correspond to multiple short needles respectively. The third locking member is used to lock the short needles in the corresponding needle grooves.

[0010] By adopting the above technical solution, during use, the pressing device is removed from the receiving groove, then the short needles are taken out, and the long needles and short needles are inserted into the flute holes of the corrugated cardboard as required. Then, the second slider is moved to correspond with multiple short needles, and the pressing device is placed on multiple short needles. Then, the above-mentioned testing device is moved to the compression testing machine, and force is applied to the pressing device. The pressing device presses down the short needles and moves them down, separating the different layers of the corrugated cardboard. Finally, the value of the corrugated paper bonding strength is measured. After the test is completed, the long needles are locked on the main support frame by the first locking member, and the short needles can be stored in the needle groove and locked by the third locking member. Finally, the entire pressing device can be stored in the receiving cavity. The entire testing device is stored as a whole, making it less likely for each part to be lost during storage.

[0011] Preferably, it further includes a first equidistant device and a second equidistant device, wherein the first equidistant device is used to control the plurality of first sliders to always maintain an equidistant setting, and the second equidistant device is used to control the plurality of second sliders to always maintain an equidistant setting.

[0012] The first equidistant device includes a receiving plate and multiple sets of first extension members. The receiving plate is slidably connected to the first frame in a vertical direction and located below multiple first sliders. Multiple third sliders are slidably connected to the receiving plate in a sliding direction parallel to the sliding direction of the first sliders, and the multiple third sliders correspond to multiple first sliders respectively. The first extension member includes two first hinge rods, which are hinged at the middle. The ends of the first hinge rods in two adjacent first extension members are hinged to each other. The multiple first sliders and the multiple sets of first extension members are arranged at intervals. The top end of the first hinge rod is hinged to the corresponding first slider, and the bottom end of the first hinge rod is hinged to the corresponding third slider.

[0013] The second equidistant device includes multiple sets of second extension members, and multiple second sliders are spaced apart from the multiple sets of second extension members. Two fourth sliders are slidably connected to the second slider along the sliding direction parallel to the long needle. The second extension member includes two second hinge rods, which are hinged in the middle. The ends of the second hinge rods in two adjacent second extension members are hinged to each other. The two ends of the second hinge rods are respectively hinged to the two fourth sliders corresponding to the second slider.

[0014] By adopting the above technical solution, since the intervals between adjacent corrugated holes are equal, as long as the distance between two adjacent first sliders is determined, the remaining first sliders will automatically move to the corresponding positions with the help of the first equidistant device, making it convenient for the operator to insert the long needle into the corresponding corrugated hole; then the operator temporarily fixes the frame on the second frame, so that the short needle and the long needle are at the same height, and then moves the second slider so that the two adjacent short needles are aligned with the corresponding corrugated holes. With the help of the first equidistant device, the remaining second sliders will automatically move to the corresponding positions, and then the second locking piece is used to lock the position of the second slider. The short needle is taken out and inserted into the corresponding corrugated hole, and then the pressing device is placed directly on the short needle. The sub-block on the pressing device will automatically abut against the corresponding short needle.

[0015] Preferably, the first locking component includes a swivel bolt and a pressing plate. One end of the pressing plate is slidably connected to the second frame along a sliding direction parallel to the receiving plate. One end of the swivel bolt is threaded onto the pressing plate and abuts against the side wall of the second frame. The other end of the pressing plate is located directly above the top surface of the second frame and is used to press multiple long needles onto the second frame.

[0016] By adopting the above technical solution, the fixing and movement of the pressing plate can be controlled by rotating the ingot bolt and changing the clamping force between the ingot bolt and the side wall of the second frame. The pressing plate fixes the position of the multiple long needles by pressing them onto the second frame.

[0017] Preferably, the third locking element includes a first magnet and a first permanent magnet. A groove communicating with the needle groove is formed on the top surface of the second slider. A sliding block is slidably connected in the needle groove along the length direction of the needle groove. A push handle is connected to the sliding block. The end of the push handle can extend out of the groove and is slidably connected in the groove along the sliding direction parallel to the sliding block. The first magnet and the first permanent magnet are respectively disposed on the push handle and the short needle. When the end of the short needle approaches the sliding block, the first permanent magnet on the short needle is attracted to the first magnet on the push handle.

[0018] By adopting the above technical solution, when the short needle is removed, the operator pushes the push handle to move the sliding block toward the opening of the needle groove, thereby pushing the short needle out of the needle groove; when the short needle is put back into the needle groove, the operator puts the short needle back into the needle groove, and the short needle can be attracted to the push handle.

[0019] Preferably, the push handle is rotatably connected to the sliding block, and the side of the push handle near the short needle has an inclined surface. The first magnet is disposed on the inclined surface. When the short needle is attracted to the push handle, the push handle rotates upward until the end away from the short needle extends out of the sliding groove. When the short needle moves away from the push handle, the push handle rotates downward until it is completely located in the needle groove.

[0020] By adopting the above technical solution, when the short needle is attracted to the push handle, the first magnet of the push handle and the first permanent magnet of the short needle attract each other. At the same time, the position of the short needle is restricted by the needle groove. Therefore, when the short needle is stationary, the push handle will rotate upward until the inclined surface is in contact with the end of the short needle. At this time, the end of the push handle away from the short needle will also extend out of the groove for the operator to push. When the short needle moves out of the needle groove, the push handle will rotate downward back into the needle groove under its own gravity without being subjected to external force. When the external compression testing machine applies force to the pressing device, the push handle can not affect the testing process of the compression testing machine.

[0021] Preferably, the second locking member includes a driving member, a clamping block, and a screw. The clamping block has an L-shaped cross-section. One end of the clamping block is slidably connected to the second slider along a sliding direction perpendicular to the second slider on the frame. The other end of the clamping block is located outside the frame and is positioned directly opposite the frame. The screw is rotatably connected to the second slider along an axis parallel to the sliding direction of the clamping block. The screw is threadedly connected to the end of the clamping block that slides on the second slider. The driving member drives the screw to rotate.

[0022] By adopting the above technical solution, the drive component drives the screw to rotate, and the clamping block threaded on the screw moves on the second slider. When the clamping block moves toward the frame side and abuts against the frame, the friction generated by the clamping block abutting against the frame restricts the position of the second slider on the frame.

[0023] Preferably, the driving component includes a temporary locking element, a first bevel gear, a second bevel gear, a timing belt, a spring, a main gear, a rack, an intercepting rod, and two timing pulleys. The intercepting rod is slidably connected to the end of the second slider away from the clamping block along a sliding direction parallel to the sliding block. One end of the intercepting rod is located on the moving path of the push rod within the groove. The rack is fixed to the intercepting rod and slidably connected to the second slider along a sliding direction parallel to the intercepting rod. The spring is disposed on the rack and drives the rack to move toward the side away from the connection between the needle groove and the outside. The two timing pulleys are rotatably connected to the second slider along a sliding direction perpendicular to the rack. The timing belt is wound around the two timing pulleys. The main gear is coaxially fixedly connected to one of the timing pulleys. The second bevel gear is coaxially fixedly connected to the other timing pulley. The first bevel gear is coaxially fixedly connected to the screw. The first bevel gear meshes with the second bevel gear. When the push handle moves to near the connection between the needle groove and the outside, the clamping block abuts against the frame. When the push handle moves away from the connection between the needle groove and the outside, the clamping block does not apply force to the frame.

[0024] By adopting the above technical solution, when the operator pushes the handle until the short needle extends out of the needle groove, the handle moves to abut against the interceptor bar and pushes the interceptor bar away from the locking block. At this time, the interceptor bar drives the rack to move. The rack meshes with the main gear, causing the main gear to rotate. The main gear then drives one of the synchronous pulleys to rotate, which in turn drives another synchronous pulley to rotate via a synchronous belt. The other synchronous pulley then drives the second bevel gear to rotate. The second bevel gear meshes with the first bevel gear, causing the first bevel gear and the screw to rotate. The rotation of the screw causes the locking block connected to the screw to move towards the frame until it abuts against the frame, thus positioning the second slider on the frame. When no external force is applied to the interceptor bar, the rack moves towards the clamping block under the action of the spring, and the clamping block moves until it no longer abuts against the frame.

[0025] Preferably, the temporary locking component is an elastic block, which is fixed on the sliding block. The second sliding block has a temporary locking groove communicating with the needle groove. The elastic block is slidably connected in the temporary locking groove along the sliding direction parallel to the second sliding block. The end of the temporary locking groove near the opening of the needle groove is tapered. When the elastic block moves to the end of the temporary locking groove near the opening of the needle groove, the elastic block is locked in the temporary locking groove when the external force is lost.

[0026] By adopting the above technical solution, when the operator pushes the push handle to move, and the short needle is about to be pushed out of the needle groove, the spring block moves to the end of the temporary locking groove that is gradually narrowed, and the spring block is locked in the temporary locking groove. At this time, the position of the push block will be temporarily fixed, thereby achieving the effect of keeping the clamping block in a clamped state.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] By setting the first locking element, the second locking element and the third locking element, after the test is completed, the long needle is locked to the main support frame by the first locking element, while the short needle can be stored in the needle groove and locked by the third locking element. Finally, the entire pressing device can be stored in the receiving cavity. The entire test device is stored as a whole, making it less likely to lose any parts when they are stored.

[0029] By setting up the first equidistant device, since the interval between adjacent corrugated holes is equal, as long as the distance between two adjacent first sliders is determined, the remaining first sliders will automatically move to the corresponding positions with the help of the first equidistant device, making it convenient for the operator to insert the long needle into the corresponding corrugated hole. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the related technology.

[0031] Figure 2 This is a schematic diagram of the overall structure of the corrugated paper bonding strength testing device under test conditions according to an embodiment of this application.

[0032] Figure 3 It is along Figure 2 A cross-sectional view along line AA in the middle.

[0033] Figure 4 This is a schematic diagram of the structure when short needles are installed on corrugated paper according to an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the pressing device in an embodiment of this application.

[0035] Figure 6 It is along Figure 5 A cross-sectional view along the BB line.

[0036] Figure 7 yes Figure 6 A magnified view of point C in the middle.

[0037] Figure 8 This is a schematic diagram of the structure of the second equidistant device according to an embodiment of this application.

[0038] Figure 9 This is a schematic diagram of the corrugated paper bonding strength testing device in its stored state according to an embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the structure of a driver component according to an embodiment of this application.

[0040] Figure 11 yes Figure 10 Enlarged view of point D in the middle.

[0041] Figure 12 It is along Figure 5 A cross-sectional view of the EE line.

[0042] Explanation of reference numerals in the attached drawings: 1. Main support frame; 11. First frame; 111. First plate; 1111. Inner groove; 12. Second frame; 121. Second plate; 113. Second magnet; 114. Second permanent magnet; 115. Receiving cavity; 13. Long needle; 14. Short needle; 15. First slider; 16. First locking element; 161. Ingot bolt; 162. Pressing plate; 17. First equidistant device; 171. Support plate; 1711. Third slider; 172. First extension element; 173. First hinge rod; 18. Support plate; 181. Support column; 19. Opening groove; 2. Pressing device; 21. Frame; 211. Support hole; 22. Second slider; 221. Sub-block; 2211. Arc surface; 22 2. Pin groove; 223. Slide groove; 224. Main block; 23. Second locking element; 231. Clamping block; 232. Screw; 24. Third locking element; 241. First permanent magnet; 242. First magnet; 25. Second equidistant device; 251. Second extension element; 252. Second hinge rod; 253. Fourth slider; 26. Sliding block; 261. Push handle; 262. Inclined surface; 27. Drive element one; 271. First bevel gear; 272. Second bevel gear; 273. Synchronous belt; 274. Spring; 275. Main gear; 276. Rack; 277. Intercepting rod; 278. Synchronous pulley; 28. Temporary locking element; 281. Elastic block; 282. Temporary locking groove; 3. Corrugated paper; 31. Corrugated hole. Detailed Implementation

[0043] The following is combined with Figure 2-12 This application is described in further detail.

[0044] This application discloses a device for testing the bonding strength of corrugated paper.

[0045] Reference Figure 2 , Figure 3This embodiment of a corrugated paper bonding strength testing device includes a main support frame 1, a pressing device 2, multiple long needles 13, and multiple short needles 14. The main support frame 1 includes a first frame 11 and a second frame 12 with an L-shaped vertical cross-section. The first frame 11 includes two first plates 111 arranged perpendicularly to each other, and the second frame 12 includes two second plates 121 arranged perpendicularly to each other. One of the first plates 111 has an inner groove 1111 perpendicularly formed on its end face away from the other first plate 111, which matches one of the second plates 121. The corresponding second plate 121 is slidably connected to the inner groove 1111 along a depth direction parallel to the depth direction of the inner groove 1111, and the depth direction of the inner groove 1111 is parallel to the width direction of the first plate 111. When the first frame 11 and the second frame 12 are placed on the platform, the bottom surface of the lower first plate 111 is attached to the platform surface, and the bottom surface of the upper second plate 121 is attached to the platform surface. The upper first plate 111 and the upper second plate 121 are arranged facing each other, and a receiving cavity 115 for the pressing device 2 to move is formed between the first frame 11 and the second frame 12.

[0046] Reference Figure 2 , Figure 3 A second magnet 113 is embedded in the side of the first plate 111 at the bottom of the first frame 11 facing the second frame 12, and a second permanent magnet 114 is embedded in the side of the second plate 121 at the top of the second frame 12 facing the first frame 11. When the second frame 12 moves towards the first frame 11 until the first plate 111 abuts against the second plate 121, the second magnet 113 and the second permanent magnet 114 attract each other, and at this time the volume of the receiving cavity 115 is at its minimum.

[0047] Reference Figure 2 , Figure 3 The first frame 11 has multiple first sliders 15 slidably connected to the upper first plate 111 along a length direction parallel to the first plate 111. Multiple long needles 13 correspond to the multiple first sliders 15. The long needles 13 are inserted into the corresponding first sliders 15 along a sliding direction parallel to the second frame 12. The length direction of the long needles 13 is parallel to the sliding direction of the second frame 12 on the first frame 11. The long needles 13 are used to insert into the corrugated holes 31 of the corrugated cardboard 3. The second frame 12 is provided with a first locking member 16, which is used to lock the position of the long needles 13 on the main support frame 1. When the first frame 11 and the second frame 12 move to the point where the second magnet 113 and the second permanent magnet 114 attract each other, the end of the long needle 13 near the second frame 12 can abut against the top surface of the second frame 12.

[0048] Reference Figure 2 , Figure 3The first locking element 16 includes a sprue bolt 161 and a pressing plate 162. The pressing plate 162 has an L-shaped vertical cross-section. The bottom end of the pressing plate 162 is slidably connected to the outside of the upper second plate 121 in the vertical direction. One end of the sprue bolt 161 is threaded onto the pressing plate 162 and abuts against the side wall of the second frame 12. The top end of the pressing plate 162 is located directly above the top surface of the corresponding second plate 121. When the second frame 12 moves to abut against the first frame 11, the pressing plate 162 is used to press the ends of multiple long needles 13 onto the second frame 12.

[0049] Reference Figure 2 , Figure 3 The operator controls the fixing and movement of the pressing plate 162 by rotating the ingot bolt 161 and changing the clamping force between the ingot bolt 161 and the side wall of the second frame 12. The pressing plate 162 fixes the position of the multiple long needles 13 by pressing them onto the second frame 12.

[0050] Reference Figure 1 The first frame 11 is equipped with a first equidistant device 17, which is used to control the multiple first sliders 15 to always maintain an equidistant setting.

[0051] Reference Figure 2 The first equidistant device 17 includes a receiving plate 171 and multiple sets of first extension members 172. The receiving plate 171 is slidably connected in the vertical direction to the outer wall of the first plate 111 located above the first frame 11, and is located below multiple first sliders 15. Multiple third sliders 1711 are slidably connected on the receiving plate 171 along a sliding direction parallel to the first sliders 15, and the multiple third sliders 1711 correspond to multiple first sliders 15 respectively. The first extension member 172 includes two first hinge rods 173, which are hinged together at the middle. The ends of the first hinge rods 173 in two adjacent first extension members 172 are hinged together. Multiple first sliders 15 and multiple sets of first extension members 172 are spaced apart from each other. The top end of the first hinge rod 173 is hinged to the corresponding first slider 15, and the bottom end of the first hinge rod 173 is hinged to the corresponding third slider 1711. All hinge axes of the first hinge rod 173 are parallel to the sliding direction of the long needle 13 on the first slider 15.

[0052] Reference Figure 2 Since the intervals between adjacent corrugated holes 31 are equal, as long as the distance between two adjacent first sliders 15 is determined, the remaining first sliders 15 will automatically move to the corresponding positions with the help of the first equidistant device 17, making it convenient for the operator to insert the long needle 13 into the corresponding corrugated hole 31.

[0053] Reference Figure 4 , Figure 5The pressing device 2 includes a frame 21 and multiple second sliders 22. The frame 21 is detachably connected to the second frame 12. When the frame 21 is connected to the second frame 12, the frame 21 is horizontally positioned, and its length direction is parallel to the length direction of the second plate 121. The second sliders 22 are slidably connected to the frame 21 along a length direction parallel to the frame 21, and their length direction is parallel to the width direction of the frame 21. The top surface of the second sliders 22 is flush with the top surface of the frame 21. A second locking element 23 is provided on each second slider 22 to lock its position on the frame 21.

[0054] Reference Figure 6 , Figure 7 The second slider 22 has a needle groove 222 on one end wall along its length direction for accommodating short needles 14. The length direction of the needle groove 222 is parallel to the length direction of the second slider 22. Multiple needle grooves 222 correspond to multiple short needles 14 respectively. The second slider 22 is provided with a third locking member 24, which is used to lock the short needles 14 in the corresponding needle grooves 222.

[0055] Reference Figure 2 , Figure 8 Two sub-blocks 221 are fixed on the bottom wall of the second slider 22. The two sub-blocks 221 are located at the two ends of the length direction of the corresponding second slider 22. The two sub-blocks 221 extend to the bottom of the frame 21. When the short needle 14 is installed on the rib hole 31 of the corrugated paper 3, the two sub-blocks 221 abut against the two ends of the short needle 14 that extend out of the corrugated paper 3.

[0056] Reference Figure 4 , Figure 8 Two support plates 18 are fixed to the side of the second plate 121 on the upper part of the second frame 12, facing the first frame 11. The two support plates 18 are vertically facing each other. Two support columns 181 are vertically fixed on the top surface of the support plates 18, and two support holes 211 matching the two support columns 181 are opened on the bottom surface of the frame 21. When the two support columns 181 on the upper support plate 18 are inserted into the two support holes 211, the frame 21 abuts against the corresponding support plate 18. At this time, the needle groove 222 and the external opening are facing the first frame 11, and the short needle 14 and the long needle 13 are at the same height. (Refer to...) Figure 8 , 9 When the two support columns 181 on the support plate 18 below are inserted into the two support holes 211, the pressing device 2 is completely located in the receiving cavity 115 and below the multiple long needles 13, and the pressing device 2 is in a retracted state.

[0057] Reference Figure 8The pressing device 2 is also provided with a second equidistant device 25, which is used to control the multiple second sliders 22 to always maintain an equidistant setting.

[0058] Reference Figure 8 The second equidistant device 25 includes multiple sets of second extension members 251. Two fourth sliders 253 are slidably connected on the bottom surface of the second slider 22 along a length direction parallel to the second slider 22. Each second extension member 251 includes two second hinge rods 252, which are hinged at the middle. The ends of the second hinge rods 252 in two adjacent second extension members 251 are hinged to each other. The two ends of the second hinge rods 252 are respectively hinged to the two fourth sliders 253 corresponding to the second slider 22, with the multiple second sliders 22 and the multiple sets of second extension members 251 spaced apart.

[0059] Reference Figure 5 , Figure 8 The operator temporarily fixes the frame 21 to the upper support plate 18, so that the short needles 14 and long needles 13 are at the same height. Then, the second slider 22 is moved so that two adjacent short needles 14 are aligned with the corresponding holes 31. With the help of the second equidistant device 25, the remaining second slider 22 will automatically move to the corresponding position. Then, the second locking piece 23 is used to lock the position of the second slider 22. (Refer to...) Figure 2 , Figure 4 Take out the short needle 14 and insert it into the corresponding hole 31. Then, place the pressing device 2 directly on the short needle 14. The sub-block 221 on the pressing device 2 will automatically abut against the corresponding short needle 14.

[0060] Reference Figure 2 , Figure 8 In order to better abut the short needle 14, the bottom wall of the sub-block 221 is provided with an arc-shaped surface 2211, and the two ends of the arc-shaped surface 2211 are recessed towards the center of the frame 21.

[0061] Reference Figure 6 , Figure 7The third locking element 24 includes a first magnet 242 and a first permanent magnet 241. A sliding block 26 is slidably connected in the needle groove 222 along the length of the needle groove 222. A push handle 261 is rotatably connected to the sliding block 26. One end of the push handle 261 is rotatably connected to the sliding block 26. The rotation axis of the push handle 261 is parallel to the width direction of the second slider 22. When no external force is applied to the push handle 261, the push handle 261 rotates downward until it abuts against the sliding block 26. At this time, the length direction of the push handle 261 is parallel to the length direction of the needle groove 222. An inclined surface 262 is provided at the end of the push handle 261 facing the communication port between the needle groove 222 and the outside world. The distance between the inclined surface 262 and the sub-block 221 gradually increases from the end of the inclined surface 262 near the communication port between the needle groove 222 and the end away from the communication port between the needle groove 222 and the outside world. The first magnet 242 is embedded in the inclined surface 262, and the first permanent magnet 241 is embedded in one end face of the short needle 14 along the length direction. The short needle 14 can slide and connect in the needle groove 222 along the length direction of the needle groove 222.

[0062] Reference Figure 5 , Figure 6 The top surface of the second slider 22 has a groove 223 communicating with the needle groove 222. When the end of the short needle 14 approaches the sliding block 26, the push handle 261 rotates upward until the end away from the short needle 14 extends out of the groove 223. At the same time, the first permanent magnet 241 on the short needle 14 is attracted to the first magnet 242 on the push handle 261. When the operator pushes the end of the push handle 261 extending out of the groove 223 to drive the short needle 14 to move, the part of the push handle 261 located in the groove 223 can also slide and connect in the groove 223 along the sliding direction parallel to the sliding block 26. When the short needle 14 is taken out, the operator pushes the push handle 261 to move the sliding block 26 toward the opening side of the needle groove 222, thereby pushing the short needle 14 out of the needle groove 222. When the short needle 14 is put back into the needle groove 222, the operator puts the short needle 14 back into the needle groove 222, and the short needle 14 can be attracted to the push handle 261.

[0063] Reference Figure 5 , Figure 6 The second locking member 23 includes a driving member 27, a clamping block 231, and a screw 232. The clamping block 231 has an L-shaped vertical cross-section. The top end of the clamping block 231 extends into the corresponding second slider and is slidably connected to the end of the second slider 22 away from the pin groove 222 and the external connection point along a direction parallel to the length of the second slider 22. The bottom end of the clamping block 231 is located outside the frame 21 and is positioned directly opposite the frame 21. The screw 232 is rotatably connected to the second slider 22 along an axis parallel to the length of the second slider 22. One end of the screw 232 is threadedly connected to the end of the clamping block 231 that slides on the second slider 22. (Refer to...) Figure 10 The drive component 27 drives the screw 232 to rotate.

[0064] Reference Figure 10 , Figure 11 The drive component 27 includes a temporary locking component 28, a first bevel gear 271, a second bevel gear 272, a timing belt 273, a spring 274, a main gear 275, a rack 276, an intercepting rod 277, and two timing pulleys 278. The intercepting rod 277 is slidably connected to one end of the second slider 22 away from the clamping block 231 along a length direction parallel to the needle groove 222. One end of the intercepting rod 277 is located on the moving path of the push rod in the slide groove 223. The rack 276 is fixed to one end of the intercepting rod 277 located in the second slider 22. The rack 276 is slidably connected to the second slider 22 along a sliding direction parallel to the intercepting rod 277. A transverse groove for the rack 276 to slide is provided in the second slider 22. The spring 274 is located in the transverse groove. The two ends of the spring 274 are respectively fixedly connected to the end face of the transverse groove away from the clamping block 231 and the end face of the rack 276 away from the clamping block 231.

[0065] Reference Figure 10 , Figure 11 Two synchronous pulleys 278 are rotatably connected inside the second slider 22 along a width direction parallel to the second slider 22. The synchronous belt 273 is wound around the two synchronous pulleys 278. One of the synchronous pulleys 278 is coaxially fixedly connected to the main gear 275. The second bevel gear 272 is coaxially fixedly connected to the other synchronous pulley 278. The first bevel gear 271 is coaxially fixedly connected to the screw 232 and meshes with the second bevel gear 272.

[0066] Reference Figure 10 , Figure 11 When the operator pushes the push handle 261 to move the short needle 14 out of the needle groove 222, the push handle 261 will move to abut against the intercepting rod 277 and push the intercepting rod 277 to move away from the locking block. At this time, the intercepting rod 277 drives the rack 276 to move. The rack 276 drives the main gear 275 to rotate through meshing with the main gear 275. The main gear 275 then drives one of the synchronous pulleys 278 to rotate, and then drives the other synchronous pulley 278 to rotate through the synchronous belt 273. Then the other synchronous pulley 278 drives the second bevel gear 272 to rotate. The second bevel gear 272 drives the first bevel gear 271 and the screw 232 to rotate through meshing with the first bevel gear 271. The rotation of the screw 232 drives the locking block connected to the screw 232 to move towards the frame 21 and abut against the frame 21, so as to realize the positioning of the second slider 22 on the frame 21. When no external force is applied to the interceptor bar 277, the rack 276 moves toward the clamping block 231 under the action of the spring 274, and the clamping block 231 moves to a position where it will not press against the frame 21.

[0067] Reference Figure 10 , Figure 11 The temporary locking member 28 is used to temporarily lock the position of the sliding block 26. The temporary locking member 28 consists of two deformable elastic blocks 281, which can be made of rubber or silicone. The two elastic blocks 281 are fixed on both sides of the sliding block 26. The second slider 22 has two temporary locking grooves 282 that communicate with the needle groove 222. The two elastic blocks 281 are slidably connected in the two temporary locking grooves 282 along the sliding direction parallel to the second slider 22. The end of the temporary locking groove 282 near the opening of the needle groove 222 is tapered. When the elastic block 281 moves to the end of the temporary locking groove 282 near the opening of the needle groove 222, the elastic block 281 is locked in the temporary locking groove 282 under the action of no external force.

[0068] The implementation principle of the corrugated paper bonding strength testing device in this application embodiment is as follows:

[0069] The operator temporarily fixes the frame 21 to the upper support plate 18, positioning the short needles 14 and long needles 13 at the same height. Then, the second slider 22 is moved so that adjacent short needles 14 align with their corresponding corrugated holes 31. With the aid of the first equidistant device 17, the remaining second slider 22 automatically moves to the corresponding position. The push handle 261 is then pushed to remove the short needles 14 and insert them into their corresponding corrugated holes 31. The clamping block 231 automatically abuts against the frame 21 to lock the second slider 22. Finally, the pressing device 2 is placed on the short needles 14, and the auxiliary block 221 on the pressing device 2 automatically abuts against the corresponding short needles 14. The testing device is then moved to a compression testing machine, and force is applied to the pressing device 2. The pressing device 2 presses down on the short needles 14, separating the different layers of the corrugated paper 3. Finally, the adhesive strength of the corrugated paper 3 is measured.

[0070] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A corrugated paper bonding strength testing device, comprising a main support frame (1), a pressing device (2), multiple long needles (13) and multiple short needles (14), characterized in that: It also includes a first locking member (16), a second locking member (23), and a third locking member (24). The main support frame (1) includes a first frame (11) and a second frame (12) with an L-shaped vertical cross-section. The second frame (12) is slidably connected to the first frame (11). A receiving cavity (115) for the pressing device (2) to move is formed between the first frame (11) and the second frame (12). Multiple sliding connections are slidably connected to the first frame (11) along a horizontal and perpendicular sliding direction to the second frame (12). The first slider (15) and multiple long needles (13) correspond to multiple first sliders (15) respectively. The long needles (13) are slidably connected to the corresponding first sliders (15) along the sliding direction parallel to the second frame (12). The first locking member (16) is used to lock the position of the long needles (13) on the main support frame (1). The long needles (13) are used to insert into the corrugated holes (31) of the corrugated cardboard (3). The end of the long needles (13) near the second frame (12) can abut against the top surface of the second frame (12). The pressing device (2) includes a frame (21) and multiple second sliders (22). When the frame (21) is located in the receiving cavity (115), the frame (21) is detachably connected to the second frame (12). The second sliders (22) are slidably connected to the frame (21) along a sliding direction parallel to the first slider (15). The second locking member (23) is used to lock the position of the second sliders (22) on the frame (21). The bottom wall of the second slider (22) is fixed with two sub-blocks (221) for pressing the two ends of the short needles (14). One end wall of the second slider (22) is provided with a needle groove (222) for the short needles (14) to be received. Multiple needle grooves (222) correspond to multiple short needles (14) respectively. The third locking member (24) is used to lock the short needles (14) in the corresponding needle grooves (222). Two support plates (18) are fixed on the side of the second plate (121) on the upper part of the second frame (12) facing the first frame (11). The two support plates (18) are arranged facing each other vertically. Two support columns (181) are vertically fixed on the top surface of the support plate (18). Two support holes (211) matching the two support columns (181) are opened on the bottom surface of the frame (21). When the two support columns (181) on the upper support plate (18) are inserted into the two support holes, the support plate (121) is positioned to support the support columns (111). When the hole (211) is made, the frame (21) abuts against the corresponding support plate (18). At this time, the needle groove (222) and the external communication port are set towards the first frame (11), and the short needle (14) and the long needle (13) are at the same height. When the two support columns (181) on the support plate (18) below are inserted into the two support holes (211), the pressing device (2) is completely located in the receiving cavity (115) and below the multiple long needles (13). The pressing device (2) is in a retracted state. It also includes a first equidistant device (17) and a second equidistant device (25), the first equidistant device (17) being used to control the plurality of first sliders (15) to always maintain an equidistant setting, and the second equidistant device (25) being used to control the plurality of second sliders (22) to always maintain an equidistant setting.

2. The corrugated paper bonding strength testing device according to claim 1, characterized in that: The first equidistant device (17) includes a receiving plate (171) and multiple sets of first extension members (172). The receiving plate (171) is slidably connected to the first frame (11) in the vertical direction and located below multiple first sliders (15). Multiple third sliders (1711) are slidably connected to the receiving plate (171) in a sliding direction parallel to the first sliders (15), and the multiple third sliders (1711) correspond to multiple first sliders (15) respectively; the first extension members ( 172) includes two first hinge rods (173), which are hinged in the middle. The ends of the first hinge rods (173) in two adjacent first extension members (172) are hinged to each other. Multiple first sliders (15) and multiple sets of first extension members (172) are arranged at intervals. The top end of the first hinge rod (173) is hinged to the corresponding first slider (15), and the bottom end of the first hinge rod (173) is hinged to the corresponding third slider (1711). The second equidistant device (25) includes multiple sets of second extension members (251), multiple second sliders (22) and multiple sets of second extension members (251) are arranged at intervals. Two fourth sliders (253) are slidably connected on the second slider (22) along the sliding direction parallel to the long needle (13). The second extension member (251) includes two second hinge rods (252), the two second hinge rods (252) are hinged in the middle, the ends of the second hinge rods (252) in two adjacent second extension members (251) are hinged to each other, and the two ends of the second hinge rods (252) are respectively hinged to the two fourth sliders (253) of the corresponding second slider (22).

3. The corrugated paper bonding strength testing device according to claim 1, characterized in that: The first locking component (16) includes a swivel bolt (161) and a pressing plate (162). One end of the pressing plate (162) is slidably connected to the second frame (12) along a sliding direction parallel to the receiving plate (171). One end of the swivel bolt (161) is threadedly connected to the pressing plate (162) and abuts against the side wall of the second frame (12). The other end of the pressing plate (162) is located directly above the top surface of the second frame (12) and is used to press multiple long needles (13) onto the second frame (12).

4. The corrugated paper bonding strength testing device according to claim 1, characterized in that: The third locking element (24) includes a first magnet (242) and a first permanent magnet (241). The top surface of the second slider (22) is provided with a groove (223) communicating with the needle groove (222). A sliding block (26) is slidably connected in the needle groove (222) along the length direction of the needle groove (222). A push handle (261) is connected to the sliding block (26). The end of the push handle (261) can extend out of the groove (223) and is slidably connected in the groove (223) along the sliding direction parallel to the sliding block (26). The first magnet (242) and the first permanent magnet (241) are respectively set on the push handle (261) and the short needle (14). When the end of the short needle (14) approaches the sliding block (26), the first permanent magnet (241) on the short needle (14) is attracted to the first magnet (242) on the push handle (261).

5. The corrugated paper bonding strength testing device according to claim 4, characterized in that: The push handle (261) is rotatably connected to the sliding block (26). The push handle (261) has an inclined surface (262) on the side near the short needle (14). The first magnet (242) is set on the inclined surface (262). When the short needle (14) is attracted to the push handle (261), the push handle (261) rotates upward until the end away from the short needle (14) extends out of the sliding groove (223). When the short needle (14) moves away from the push handle (261), the push handle (261) rotates downward until it is completely located in the needle groove (222).

6. The corrugated paper bonding strength testing device according to claim 4, characterized in that: The second locking member (23) includes a driving member (27), a clamping block (231), and a screw (232). The clamping block (231) has an L-shaped cross-section. One end of the clamping block (231) is slidably connected to the second slider (22) along a direction perpendicular to the sliding direction of the second slider (22) on the frame (21). The other end of the clamping block (231) is located outside the frame (21) and is positioned directly opposite the frame (21). The screw (232) is rotatably connected to the second slider (22) along an axis parallel to the sliding direction of the clamping block (231). The screw (232) is threadedly connected to the end of the clamping block (231) that slides on the second slider (22). The driving member (27) drives the screw (232) to rotate.

7. The corrugated paper bonding strength testing device according to claim 6, characterized in that: The driving component 1 (27) includes a temporary locking component (28), a first bevel gear (271), a second bevel gear (272), a timing belt (273), a spring (274), a main gear (275), a rack (276), an intercepting rod (277), and two timing pulleys (278). The intercepting rod (277) is slidably connected to one end of the second slider (22) away from the clamping block (231) along a sliding direction parallel to the sliding block (26). One end of the intercepting rod (277) is located on the moving path of the push rod in the groove (223). The rack (276) is fixed on the intercepting rod (277) and slidably connected to the second slider (22) along a sliding direction parallel to the intercepting rod (277). The spring (274) is set on the rack (276) and drives the rack (276) to move toward the side away from the communication port between the needle groove (222) and the outside. Two synchronous pulleys (278) are rotatably connected to the second slider (22) along a sliding direction perpendicular to the rack (276). The synchronous belt (273) is wound around the two synchronous pulleys (278). The main gear (275) is coaxially fixedly connected to one of the synchronous pulleys (278). The second bevel gear (272) is coaxially fixedly connected to the other synchronous pulley (278). The first bevel gear (271) is coaxially fixedly connected to the screw (232). The first bevel gear (271) meshes with the second bevel gear (272). When the push handle (261) moves to the point close to the communication port between the needle groove (222) and the outside, the clamping block (231) abuts against the frame (21). When the push handle (261) moves away from the communication port between the needle groove (222) and the outside, the clamping block (231) does not apply force to the frame (21).

8. The corrugated paper bonding strength testing device according to claim 7, characterized in that: The temporary locking component (28) is a spring block (281), which is fixed on the sliding block (26). The second slider (22) has a temporary locking groove (282) that communicates with the needle groove (222). The spring block (281) is slidably connected in the temporary locking groove (282) along the sliding direction parallel to the second slider (22). The end of the temporary locking groove (282) near the opening of the needle groove (222) is tapered. When the spring block (281) moves to the end of the temporary locking groove (282) near the opening of the needle groove (222), the spring block (281) is locked in the temporary locking groove (282) under the action of no external force.

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