Strength rapid detection device for stretch wrapping film

Abstract

The application provides a kind of strength rapid detection equipment for stretching wrapping film, belong to wrapping film production detection equipment technical field, including the clamping assembly for clamping wrapping film, with clamping assembly is connected for stretching and extending wrapping film stretching drive assembly and stretching transmission assembly;Fixed clamping part and movable clamping part can be relatively rotated around hinge part to the position that the clamping surface of fixed clamping part and movable clamping part mutually adhere;The clamping surface of fixed clamping part and movable clamping part can clamp wrapping film from the two sides of wrapping film;Pressure measurement unit is used to detect the tension that stretching drive assembly applies to wrapping film through clamping assembly.Utilize such a kind of strength rapid detection equipment for stretching wrapping film, connect wrapping film with clamping assembly, and the tension that pressure measurement unit can detect the tension that wrapping film receives, and the detection value of pressure measurement unit can judge the stretching performance of wrapping film.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wrapping film production detection equipment, more particularly to a strength rapid detection equipment for stretching wrapping film. BACKGROUND

[0002] The wrapping film is a kind of plastic film with high elasticity and self-adhesion, usually made of linear low-density polyethylene (LLDPE) and other materials, widely used in logistics, warehousing and transportation industry, used for wrapping and fixing goods (such as pallet goods), preventing scattering, dustproof, moisture-proof, and improving transportation efficiency.

[0003] The ductility or stretching performance is the core performance index of the wrapping film, and the purpose of detection is to ensure the wrapping stability. The wrapping film needs to tightly wrap the goods after a certain stretching, and the good ductility enables it to adapt to goods of different shapes and sizes without breaking. If the ductility is insufficient, the film is easy to break, resulting in loose goods. Excessive stretching will reduce the puncture strength and resilience of the film, resulting in unstable wrapping; insufficient stretching may waste materials or fail to fix the goods.

[0004] However, since the wrapping film has a certain width, the force applied to the wrapping film by the existing wrapping film detection equipment cannot be uniformly distributed in the width direction of the wrapping film, resulting in uneven stress. SUMMARY

[0005] Therefore, one purpose of the present application is to provide a strength rapid detection equipment for stretching wrapping film, which is used for stretching the wrapping film to detect the strength of the wrapping film; the strength rapid detection equipment comprises a clamping assembly for clamping the wrapping film, a stretching drive assembly and a stretching transmission assembly connected with the clamping assembly for stretching the ductile wrapping film.

[0006] The clamping assembly comprises a fixed clamping part and a movable clamping part hingedly connected with each other, and the fixed clamping part and the movable clamping part are respectively provided with clamping surfaces; the fixed clamping part and the movable clamping part can be relatively rotated around the hinge part to a position where the clamping surfaces of the fixed clamping part and the movable clamping part are in close contact with each other; the clamping surfaces of the fixed clamping part and the movable clamping part can clamp the wrapping film from both sides of the wrapping film.

[0007] The stretching drive assembly and the stretching transmission assembly are connected with the clamping assembly and can drive the clamping assembly to move, thereby stretching the ductile wrapping film to detect the strength of the wrapping film.

[0008] A pressure measurement unit is arranged on the clamping assembly, and the pressure measurement unit is used to detect the tension applied to the wrapping film by the stretching drive assembly through the clamping assembly.

[0009] Preferably, the strength rapid detection equipment further comprises a support body for connecting the clamping assembly, the stretching drive assembly and the stretching transmission assembly.

[0010] The stretching transmission assembly comprises a screw connected with the stretching driving assembly, a transmission rod connected with the screw, and a transmission wheel matched with the screw arranged at one end of the transmission rod connected with the screw, and an external thread arranged on the transmission rod; the stretching transmission assembly further comprises a first sliding seat connected with the clamping assembly, and an internal thread hole matched with the external thread of the transmission rod arranged on the first sliding seat; the stretching driving assembly can drive the screw to rotate, thereby driving the transmission wheel and the transmission rod to rotate, and finally driving the first sliding seat and the clamping assembly to translate along the length direction of the transmission rod.

[0011] Preferably, the strength rapid detection equipment comprises two sets of clamping assemblies respectively clamping two positions of the wrapping film, and two sets of stretching transmission assemblies respectively connected with the two sets of clamping assemblies; the stretching driving assembly can drive the two sets of clamping assemblies to move away from each other through the stretching transmission assemblies, thereby stretching the wrapping film.

[0012] Preferably, the strength rapid detection equipment comprises two sets of clamping assemblies respectively clamping two positions of the wrapping film, and four sets of stretching transmission assemblies, in which two sets of stretching transmission assemblies are respectively connected with one clamping assembly through first sliding seats, and the other two sets of stretching transmission assemblies are connected with the other clamping assembly through first sliding seats.

[0013] The two first sliding seats connected with one clamping assembly are arranged at two positions in the length direction of the fixed clamping part, the stretching driving assembly can drive the two sets of clamping assemblies to move away from each other through the stretching transmission assemblies, and the moving speeds of the two ends of the two sets of clamping assemblies in the length direction are consistent during the moving process.

[0014] Preferably, the strength rapid detection equipment further comprises two sets of stretching driving assemblies, and each set of the two sets of stretching driving assemblies is connected with two sets of stretching transmission assemblies; the two sets of stretching transmission assemblies connected with the clamping assembly are respectively connected with the two sets of stretching driving assemblies.

[0015] The first sliding seat is hingedly connected with the fixed clamping part through the shaft hole; the fixed clamping part is provided with a sliding rail along the length direction of the clamping assembly; among the two first sliding seats connected with the clamping assembly, one first sliding seat is provided with a rail connecting part matched with the sliding rail, the first sliding seat is slidingly connected with the fixed clamping part through the sliding rail and the rail connecting part, and the rail connecting part can move along the length direction of the clamping assembly.

[0016] The sliding rail is a protrusion arranged at the bottom of the fixed clamping part, and the rail connecting part comprises buckles matched with the protrusions at the two sides of the bottom of the fixed clamping part; the stretching driving assembly can drive the two sets of clamping assemblies to move in the direction away from each other through the stretching transmission assembly, and the moving speeds of the two ends of the two sets of clamping assemblies in the length direction are inconsistent during the movement.

[0017] Preferably, the first sliding seat and the rail connecting part are hinged through the shaft hole; the first sliding seat is provided with a protruding shaft hole, the rail connecting part is provided with a rotating shaft matched with the shape and position of the shaft hole, and the first sliding seat and the rail connecting part can be hinged through the shaft hole and the rotating shaft.

[0018] Preferably, the clamping surfaces of the fixed clamping part and the movable clamping part are provided with placing grooves, and the placing grooves are provided with magnetic members; the magnetic poles of the magnetic members of the fixed clamping part and the movable clamping part facing each other are configured as magnetic poles attracting each other; when the fixed clamping part and the movable clamping part are attached, the magnetic members on the fixed clamping part and the movable clamping part are attracted to each other, thereby fixing the wrapping film between the fixed clamping part and the movable clamping part.

[0019] Preferably, the clamping assembly is further provided with a pressure measuring unit connected with the magnetic member, and the pressure measuring unit can detect the tension applied to the magnetic member by the wrapping film.

[0020] A shielding member is arranged between the magnetic member and the pressure measuring unit, and the shielding member is used to reduce the interference of the magnetic field of the magnetic member on the pressure measuring unit.

[0021] The clamping assembly is further provided with a limiting member, and the limiting member is used to fix the position of the magnetic member; the limiting member and the magnetic member have a gap in the width direction of the clamping assembly.

[0022] Preferably, the fixed clamping part and the movable clamping part are hinged, the hinge part is arranged at one end of the clamping assembly in the length direction, the other end of the clamping assembly in the length direction is provided with an eccentric wheel, the eccentric wheel is connected with a handle, the eccentric wheel can be rotated through the handle, thereby pushing the fixed clamping part and the movable clamping part to separate on the clamping surface and generate a gap.

[0023] Preferably, a plurality of magnetic members are arranged on the fixed clamping part and the movable clamping part along the length direction of the clamping assembly, and some of the plurality of magnetic members or all the magnetic members are respectively connected with the pressure measuring unit.

[0024] According to the embodiment of the present application, the strength rapid detection equipment for stretching the wrapping film can complete the stretching detection of the wrapping film, the wrapping film is connected with the clamping assembly, the stretching driving assembly can drive the clamping assembly to move through the stretching transmission assembly, thereby stretching the wrapping film, the pressure measuring unit can detect the tension received by the wrapping film, and the detection value of the pressure measuring unit can be used to judge the stretching performance of the wrapping film. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present disclosure includes the specification, the drawings accompanying the specification, which illustrate various exemplary embodiments, features and aspects of the present disclosure, and are used for the explanation of the principles of the present disclosure. The present invention will be more fully understood from the following detailed description, taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 is a schematic view of a strength rapid detection equipment for stretch wrapping film according to an embodiment of the present invention;

[0027] Figure 2 is Figure 1 is a partial enlarged view of A in FIG. 1;

[0028] Figure 3 is Figure 1 is a partial enlarged view of B in FIG. 1;

[0029] Figure 4 is Figure 1 is a partial enlarged view of C in FIG. 1;

[0030] Figure 5 is a schematic view of a clamping assembly of a strength rapid detection equipment for stretch wrapping film according to an embodiment of the present invention;

[0031] Figure 6 is Figure 5 is a partial enlarged view of D in FIG. 1;

[0032] Figure 7 is Figure 5 is a partial enlarged view of E in FIG. 1;

[0033] Figure 8 is a schematic view of a puncture assembly of a strength rapid detection equipment for stretch wrapping film according to an embodiment of the present invention;

[0034] Figure 9 is Figure 8 is a partial enlarged view of F in FIG. 1;

[0035] Figure 10 is a schematic view of a stretching drive assembly and a stretching transmission assembly of a strength rapid detection equipment for stretch wrapping film according to an embodiment of the present invention;

[0036] Figure 11 is a schematic view of a first sliding seat for stretch wrapping film according to an embodiment of the present invention;

[0037] Figure 12 is Figure 11 is a partial enlarged view of G in FIG. 1;

[0038] Figure 13It is an explosion view of the connection relationship of the fixed clamping part, the track connecting part and the first sliding seat for stretching the wrapping film according to the embodiment of the present application.

[0039] Wherein: the clamping assembly 11, the fixed clamping part 111, the movable clamping part 112, the stretching driving assembly 12, the wrapping film 13, the piercing support frame 21, the piercing driver 22, the piercing device 23, the support plate 24, the angle limiting block 25, the support body 26, the transmission rod 31, the transmission wheel 32, the rack 33, the first sliding seat 34, the second sliding seat 35, the elastic member 36, the winding table 37, the winding shaft 38, the track connecting part 41, the sliding track 42, the shaft hole 43, the rotating shaft 44, the magnetic member 51, the shielding member 52, the pressure metering unit 53, the limiting member 54, the handle 55, the cutter track 61, the cutter 62, the distance measuring device 63. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be further described in detail below by embodiments, and in conjunction with the drawings, but the present application is not limited to the following embodiments.

[0041] The wrapping film 13 is a plastic film with high elasticity and self-adhesion, usually made of linear low-density polyethylene (LLDPE) and other materials, widely used in logistics, warehousing and transportation industries for wrapping and fixing goods (such as pallet goods), preventing scattering, dustproof, moistureproof and improving transportation efficiency.

[0042] The ductility or stretching performance is the core performance indicator of the wrapping film 13, and the purpose of detection is to ensure the wrapping stability. The wrapping film 13 needs to tightly wrap the goods after a certain stretching, and good ductility enables it to adapt to goods of different shapes and sizes without breaking. If the ductility is insufficient, the film is prone to breakage, resulting in loose goods. Excessive stretching will reduce the puncture strength and resilience of the film, resulting in unstable wrapping; insufficient stretching may waste materials or fail to fix the goods.

[0043] However, since the wrapping film 13 has a certain width, the force applied by the existing wrapping film 13 detection equipment to the wrapping film 13 cannot be uniformly distributed in the width direction of the wrapping film 13, resulting in uneven stress.

[0044] In order to solve the above problems, the purpose of the present application is to provide a strength rapid detection equipment for stretching the wrapping film, which is used for stretching the wrapping film 13 to detect the strength of the wrapping film 13; the strength rapid detection equipment comprises a clamping assembly 11 for clamping the wrapping film 13, a stretching driving assembly 12 and a stretching transmission assembly connected with the clamping assembly 11 for stretching the ductile wrapping film 13.

[0045] The clamping assembly 11 comprises a fixed clamping part 111 and a movable clamping part 112 which are hinged to each other, and the fixed clamping part 111 and the movable clamping part 112 are respectively provided with clamping surfaces, and the fixed clamping part 111 and the movable clamping part 112 can be relatively rotated around the hinge to a position where the clamping surfaces of the fixed clamping part 111 and the movable clamping part 112 are in close contact with each other; the clamping surfaces of the fixed clamping part 111 and the movable clamping part 112 can clamp the wrapping film 13 from both sides of the wrapping film 13.

[0046] The stretching driving assembly 12 and the stretching transmission assembly are connected with the clamping assembly 11, and can drive the clamping assembly 11 to move, so as to stretch and expand the wrapping film 13 to detect the strength of the wrapping film 13.

[0047] The clamping assembly 11 is provided with a pressure measurement unit 53, and the pressure measurement unit 53 is used to detect the tension applied to the wrapping film 13 by the clamping assembly 11 through the stretching driving assembly 12.

[0048] In this embodiment, as shown in Figure 1 、 Figure 5 、 Figure 8 The clamping assembly 11 comprises a fixed clamping part 111 and a movable clamping part 112 which are hinged to each other, and the fixed clamping part 111 and the movable clamping part 112 are two long strip-shaped components, and the hinge is arranged at one end of the fixed clamping part 111 and the movable clamping part 112 in the length direction, and the fixed clamping part 111 and the movable clamping part 112 can be opened and closed around the hinge, and in the open state, the wrapping film 13 can be placed between the fixed clamping part 111 and the movable clamping part 112. In the closed state, the clamping surfaces of the fixed clamping part 111 and the movable clamping part 112 respectively contact and press the wrapping film 13 from both sides of the wrapping film 13 to fix the wrapping film 13.

[0049] The stretching driving assembly 12 of this embodiment is an electric motor, and the stretching transmission assembly is used to convert the rotary motion of the electric motor into translational motion, and drive the clamping assembly 11 to translate to stretch the wrapping film 13. The stretching transmission assembly can be a lead screw and a sliding seat matched with the lead screw.

[0050] The pressure measurement unit 53 can be a force sensor or a pressure sensor, which is used to detect the interaction force between the clamping assembly 11 and the wrapping film 13, and further detect the tension value applied to the wrapping film 13 by the stretching driving assembly 12, and further detect whether the wrapping film 13 is broken under a certain tension value, and the size of the force that breaks the wrapping film 13.

[0051] The strength rapid detection equipment for stretching wrapping film can complete the stretching detection of the wrapping film 13, connect the wrapping film 13 with the clamping assembly 11, drive the clamping assembly 11 to move through the stretching transmission assembly of the stretching driving assembly 12, and then stretch the wrapping film 13, and the pressure measurement unit 53 can detect the tension of the wrapping film 13, and the detection value of the pressure measurement unit 53 can judge the stretching performance of the wrapping film 13.

[0052] As preferred, as shown in Figure 2 The strength rapid detection equipment for stretching wrapping film further comprises a piercing assembly, the piercing assembly comprises a piercing support frame 21, a piercing driver 22 arranged on the piercing support frame 21, and a piercing device 23 connected with the piercing driver 22. The piercing device 23 can be a component with a sharp head, the piercing support frame 21 can place the piercing device 23 on one side of the wrapping film 13, the piercing driver 22 can be a linear motor, a pneumatic cylinder or other device capable of outputting linear movement, the piercing driver 22 can push the piercing device 23 to pierce the wrapping film 13, and a force sensor is arranged between the piercing driver 22 and the piercing device 23, and the force sensor is used to detect the force of piercing the wrapping film 13.

[0053] As preferred, as shown in Figure 2 , Figure 8 , Figure 9 The support plate 24 is arranged on the support body 26, the support plate 24 is provided with a piercing hole, the piercing support frame 21 can install the piercing device 23 above the piercing hole, the support plate 24 is used to support the wrapping film 13, when the piercing device 23 pierces the wrapping film 13, the support plate 24 can support the wrapping film 13 near the piercing device 23, and prevent the wrapping film 13 from being excessively deformed along the piercing direction. The connection between the piercing support frame 21 and the support body 26 is movable connection, the piercing support frame 21 can move the piercing device 23 to an angle that does not block the area above the support plate 24, and prevent the piercing driver 22, the piercing device 23 and the piercing support frame 21 from affecting the connection between the wrapping film 13 and the clamping assembly 11.

[0054] The connection part of the piercing support frame 21 and the support body 26 is provided with an angle limiting block 25, and the angle limiting block 25 is used to align the piercing device 23 with the piercing hole.

[0055] Further, the strength rapid detection equipment further comprises a support body 26, and the support body 26 is used to connect the clamping assembly 11, the stretching driving assembly 12 and the stretching transmission assembly;

[0056] The stretching transmission assembly comprises a screw connected with the stretching driving assembly 12, a transmission rod 31 connected with the screw, and a transmission wheel 32 provided at one end of the transmission rod 31 and matched with the screw, and an outer thread provided on the transmission rod 31; the stretching transmission assembly further comprises a first sliding seat 34 connected with the clamping assembly 11, and an inner thread hole provided on the first sliding seat 34 and matched with the outer thread of the transmission rod 31; the stretching driving assembly 12 can drive the screw to rotate, and then drive the transmission wheel 32 and the transmission rod 31 to rotate, and finally drive the first sliding seat 34 and the clamping assembly 11 to translate along the length direction of the transmission rod 31.

[0057] In the embodiment, as shown in Figure 1 、 Figure 5 、 Figure 10 、 Figure 11 The support body 26 can be a workbench, and the stretching driving assembly 12 is installed on the support body 26.

[0058] The stretching driving assembly 12 is an electric motor, the output shaft of the electric motor is connected with a screw, the transmission wheel 32 can be a gear provided on the transmission rod 31, the screw can drive the gear to rotate, and an outer thread is provided on the transmission rod 31; the rotation of the outer thread can drive the first sliding seat 34 to translate along the length direction of the transmission rod 31, and then the stretching driving assembly 12 can drive the clamping assembly 11 to move through the stretching transmission assembly.

[0059] Preferably, a material rack 33 is further provided on the transmission rod 31, and a second sliding seat 35 is sleeved on the transmission rod 31, the second sliding seat 35 is provided with a through hole, and the rotation of the transmission rod 31 cannot drive the second sliding seat 35 to translate through the thread connection; the material rack 33 is used for placing the winding film 13 in a winding state.

[0060] In use, the winding film 13 is placed on the material rack 33, then the head of the winding film 13 is taken off from the winding roll, and the unwound winding film 13 is clamped by the clamping assembly 11 so that the clamping assembly 11 clamps the winding film 13. The contact between the material rack 33 and the winding roll is provided with a resistance block, so that there is enough resistance between the contact surfaces of the material rack 33 and the winding roll, and the clamping assembly 11 cannot release more winding film 13 when moving, and the released winding film 13 is stretched.

[0061] Preferably, an elastic member 36 is provided between the first sliding seat 34 and the second sliding seat 35, the elastic member 36 can be a spring sleeved on the transmission rod 31, and the elastic member 36 is used for preventing the first sliding seat 34 and the second sliding seat 35 from colliding.

[0062] Further, the strength rapid detection device comprises two sets of clamping assemblies 11, each of which clamps two positions of the wrapping film 13; the strength rapid detection device further comprises two sets of stretching transmission assemblies, each of which is connected with the clamping assembly 11; the stretching drive assembly 12 can drive the two sets of clamping assemblies 11 to move away from each other through the stretching transmission assemblies, so as to stretch the wrapping film 13.

[0063] In this embodiment, the two sets of clamping assemblies 11 and the material rack 33 are arranged along the length direction of the transmission rod 31, and the wrapping film 13 released from the material roll passes through one clamping assembly 11 and then passes through another clamping assembly 11.

[0064] The two sets of stretching transmission assemblies can share one transmission rod 31, which is arranged along the length direction of the workbench, the gear is arranged at the middle part of the transmission rod 31, the outer threads on both sides of the gear are oppositely arranged, when the transmission rod 31 rotates in one direction, the first sliding seat 34 on both sides of the gear on the transmission rod 31 moves towards each other, and when the transmission rod 31 rotates in the other direction, the first sliding seat 34 on both sides of the gear on the transmission rod 31 moves away from each other.

[0065] Further, the strength rapid detection device comprises two sets of clamping assemblies 11, each of which clamps two positions of the wrapping film 13; the strength rapid detection device further comprises four sets of stretching transmission assemblies, among which, two sets of stretching transmission assemblies are connected with one clamping assembly 11 through the first sliding seat 34, and the other two sets of stretching transmission assemblies are connected with the other clamping assembly 11 through the first sliding seat 34.

[0066] The two first sliding seats 34 connected with one clamping assembly 11 are arranged at two positions along the length direction of the fixed clamping part 111, the stretching drive assembly 12 can drive the two sets of clamping assemblies 11 to move away from each other through the stretching transmission assemblies, and the moving speed of the two ends of the two sets of clamping assemblies 11 is consistent during the movement.

[0067] In this embodiment, the four sets of stretching transmission assemblies refer to that the two sets of stretching transmission assemblies share one transmission rod 31, and the four sets of stretching transmission assemblies comprise two transmission rods 31, which are arranged along the width direction of the workbench, the clamping assembly 11 is connected with the two transmission rods 31 along the width direction, and the two transmission rods 31 can be balanced in stress.

[0068] Preferably, the transmission rod 31 is further provided with a winding table 37, the winding table 37 is provided with a winding shaft 38, the winding shaft 38 can be an electrostatic winding shaft 38, the winding table 37 is further provided with a winding drive for driving the winding shaft 38 to rotate, and the two clamping assemblies 11 are arranged between the material rack 33 and the winding table 37.

[0069] The winding film 13 released from the material roll first passes through one clamping assembly 11, then passes through another clamping assembly 11, and finally is wound on the winding shaft 38, and a winding driver is used to tension the winding film 13 between the two clamping assemblies 11. The movement speeds of the two ends of the two clamping assemblies 11 in the length direction are consistent, which means that the winding film 13 is uniformly stretched in the width direction of the winding film 13.

[0070] It can be preferred that, as shown in the figure, the winding table 37 is connected with the transmission rod 31 through the second sliding seat 35, and the first sliding seat 34 and the second sliding seat 35 are provided with an elastic member 36, which can be a spring sleeved on the transmission rod 31. The elastic member 36 is used to prevent the first sliding seat 34 and the second sliding seat 35 from colliding. Figure 12

[0071] Further, the strength rapid detection device further comprises two sets of stretching driving assemblies 12, each set of the two sets of stretching driving assemblies 12 is connected with two sets of stretching transmission assemblies; and the two sets of stretching transmission assemblies connected with the clamping assembly 11 are respectively connected with the two sets of stretching driving assemblies 12.

[0072] The first sliding seat 34 is provided with an axle hole 43, and the first sliding seat 34 is hinged with the fixed clamping part 111 through the axle hole 43. The fixed clamping part 111 is provided with a sliding track 42 along the length direction of the clamping assembly 11. Among the two first sliding seats 34 connected with the clamping assembly 11, one first sliding seat 34 is provided with a track connecting part 41 matched with the sliding track 42, and the first sliding seat 34 is slidingly connected with the fixed clamping part 111 through the sliding track 42 and the track connecting part 41. The track connecting part 41 can move along the length direction of the clamping assembly 11.

[0073] The sliding track 42 is a protruding part provided on both sides of the bottom of the fixed clamping part 111, and the track connecting part 41 comprises buckles clamped with the protruding parts on both sides of the bottom of the fixed clamping part 111. The stretching driving assembly 12 can move the two sets of clamping assemblies 11 away from each other through the stretching transmission assembly, and the movement speed of the two ends of the two sets of clamping assemblies 11 in the length direction is inconsistent during the movement.

[0074] In the embodiment, the two sets of stretching driving assemblies 12 comprise two stretching drivers respectively arranged in the width direction of the workbench, that is, two electric motors, and are respectively connected with the two transmission rods 31 in the width direction. The two stretching drivers can rotate synchronously or asynchronously. When the two stretching drivers rotate synchronously, the movement speed of the two ends of the two clamping assemblies 11 in the length direction is consistent, and the winding film 13 is uniformly stretched in the width direction of the winding film 13. When the two stretching drivers rotate asynchronously, the movement speed of the two ends of the two clamping assemblies 11 in the length direction is inconsistent, and an irregular tension is formed on the winding film 13.

[0075] ​When the two stretching actuators rotate asynchronously, relative rotation and movement occur between the fixed clamping portion 111 and the first slide 34. The first slide 34 and the fixed clamping portion 111 are hingedly connected through the shaft hole 43 to accommodate the rotation between the fixed clamping portion 111 and the first slide 34. The sliding track 42 and the track connecting portion 41 are used to accommodate the relative movement between the fixed clamping portion 111 and the first slide 34.

[0076] Furthermore, the first slide 34 is hinged to the track connecting part 41 through an axis hole 43; a protruding axis hole 43 is provided on the first slide 34, and the track connecting part 41 is provided with a rotating shaft 44 whose shape and position match the axis hole 43, and the first slide 34 and the track connecting part 41 can be hinged through the axis hole 43 and the rotating shaft 44.

[0077] In this embodiment, Figure 13 As shown, a connection method is proposed between the first slide 34, the track connection part 41, and the fixed clamping part 111. The first slide 34 is provided with a protruding shaft hole 43, and the track connection part 41 is provided with a rotating shaft 44 whose shape and position match the shaft hole 43. The first slide 34 and the track connection part 41 can be hingedly connected through the shaft hole 43 and the rotating shaft 44. The sliding rails 42 are protrusions provided on both sides of the bottom of the fixed clamping part 111. The track connection part 41 includes buckles that engage with the protrusions on both sides of the bottom of the fixed clamping part 111. The stretching drive assembly 12 can move the two sets of clamping assemblies 11 in a direction away from each other through the stretching transmission assembly.

[0078] Furthermore, a placement groove is provided on the clamping surface of the fixed clamping part 111 and the movable clamping part 112, and a magnetic part 51 is provided in the placement groove. The facing magnetic poles of the magnetic parts 51 of the fixed clamping part 111 and the movable clamping part 112 are configured to attract each other. When the fixed clamping part 111 and the movable clamping part 112 are attached, the magnetic parts 51 on the fixed clamping part 111 and the movable clamping part 112 adsorb each other and thus fix the wrapping film 13 between the fixed clamping part 111 and the movable clamping part 112.

[0079] In this embodiment, Figure 7 As shown, the magnetic member 51 can make a magnet with one pole of the magnet on the clamping surface. When the fixed clamping part 111 and the movable clamping part 112 are fitted together, the two magnetic members 51 attract and fit each other to achieve the function of clamping and fixing the wrapping film 13.

[0080] Furthermore, the clamping assembly 11 is further provided with a pressure metering unit 53 connected to the magnetic member 51 , and the pressure metering unit 53 is capable of detecting the tension applied by the wrapping film 13 to the magnetic member 51 ;

[0081] A shielding member 52 is arranged between the magnetic member 51 and the pressure measurement unit 53, and is used to reduce the interference of the magnetic field of the magnetic member 51 on the pressure measurement unit 53.

[0082] The clamping assembly 11 is further provided with a limiting member 54, which is used to fix the position of the magnetic member 51, and has a gap with the magnetic member 51 in the width direction of the clamping assembly 11.

[0083] In this embodiment, the pressure measurement unit 53 can be a force sensor or a pressure sensor. When the wrapping film 13 is stretched, the magnetic members 51 inside the two clamping assemblies 11 will be pulled to move towards each other, and then a pushing force is generated between the magnetic members 51 and the fixed clamping part 111 or the movable clamping part 112, which is detected by the pressure measurement unit 53.

[0084] The limiting member 54 can be a cover plate arranged on both sides of the clamping surface, and the magnetic member 51 is provided with a step matched with the limiting member 54, which is used to prevent the magnetic member 51 from falling off the fixed clamping part 111 or the movable clamping part 112.

[0085] Further, the fixed clamping part 111 and the movable clamping part 112 are hinged, and the hinge part is arranged at one end of the clamping assembly 11 in the length direction. The other end of the clamping assembly 11 in the length direction is provided with an eccentric wheel, which is connected with a handle 55. The eccentric wheel can be rotated by the handle 55, and then the fixed clamping part 111 and the movable clamping part 112 are separated on the clamping surface and a gap is generated.

[0086] In this embodiment, as shown in Figure 3 The eccentric wheel includes a large-diameter part and a small-diameter part. The eccentric wheel of this embodiment is hinged with the movable clamping part 112, and the small-diameter part is in contact with the fixed clamping part 111 when the fixed clamping part 111 and the movable clamping part 112 are in the closed state. At this time, the fixed clamping part 111 and the movable clamping part 112 can be separated by rotating the eccentric wheel through the handle 55, so that the large-diameter part is in contact with the fixed clamping part 111, so as to place the fixed clamping part 111 and the movable clamping part 112 in the open state.

[0087] Further, a plurality of magnetic members 51 are arranged on the fixed clamping part 111 and the movable clamping part 112 in the length direction of the clamping assembly 11, and some or all of the plurality of magnetic members 51 are connected with the pressure measurement unit 53.

[0088] In this embodiment, the plurality of magnetic members 51 can ensure that the clamping force of the clamping assembly 11 on the wrapping film 13 is sufficient, and the plurality of pressure measurement units 53 can detect the stress at different positions in the width direction of the wrapping film 13.

[0089] It can be preferred thatFigure 6 As shown, a cutter track 61 and a cutter 62 arranged on the cutter track 61 are further provided on the clamping assembly 11 close to the material rack 33 . The cutter 62 is used to cut the stretch film 13 after the inspection is completed.

[0090] It is preferred that Figure 12 As shown, the clamping assembly 11 is provided with a distance measuring device 63, which is used to detect the distance between the two clamping assemblies 11, and further detect the distance data when the stretch film 13 is stretched. The distance measuring device 63 can be a laser rangefinder.

[0091] The various embodiments disclosed in the present invention have been described above. The above description is exemplary and not exhaustive, and the scope of the present invention is not limited to the above embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the spirit and scope of the present invention. That is to say, those skilled in the art can make various changes and improvements to the present invention in form and detail, and these are all considered to fall within the scope of protection of the present invention. The choice of terms used in this article is intended to best explain the principles of the various embodiments, practical applications or improvements to the technology in the market, or to enable those skilled in the art to understand the various embodiments disclosed herein.

Claims

1. A rapid strength testing device for stretching a stretch film, used for stretching a stretch film (13) to test the strength of the stretch film (13); characterized in that, The rapid strength detection device comprises a clamping assembly (11) for clamping the stretch film (13), a stretching drive assembly (12) connected to the clamping assembly (11) for stretching and extending the stretch film (13), and a stretching transmission assembly; The clamping assembly (11) includes a fixed clamping portion (111) and a movable clamping portion (112) hinged to each other, and clamping surfaces are respectively provided on the fixed clamping portion (111) and the movable clamping portion. The fixed clamping portion (111) and the movable clamping portion can rotate relative to each other around the hinge portion to a position where the clamping surfaces of the fixed clamping portion (111) and the movable clamping portion are in contact with each other; the clamping surfaces of the fixed clamping portion (111) and the movable clamping portion can clamp the wrapping film (13) from both sides of the wrapping film (13); The stretching drive assembly (12) and the stretching transmission assembly are connected to the clamping assembly (11), and are capable of driving the clamping assembly (11) to move, thereby stretching and extending the stretch film (13) to detect the strength of the stretch film (13); The clamping assembly (11) is provided with a pressure metering unit (53), and the pressure metering unit (53) is used to detect the tension applied by the stretching drive assembly (12) to the stretch film (13) through the clamping assembly (11); A placement groove is provided on the clamping surfaces of the fixed clamping part (111) and the movable clamping part (112), and a magnetic part (51) is provided in the placement groove. The magnetic poles of the magnetic parts (51) of the fixed clamping part (111) and the movable clamping part (112) facing each other are configured as magnetic poles that attract each other. When the fixed clamping part (111) and the movable clamping part (112) are attached to each other, the magnetic parts (51) on the fixed clamping part (111) and the movable clamping part (112) are attracted to each other and thus fix the wrapping film (13) between the fixed clamping part (111) and the movable clamping part (112); The clamping assembly (11) is further provided with a pressure metering unit (53) connected to the magnetic member (51), and the pressure metering unit (53) is capable of detecting the tension applied by the wrapping film (13) to the magnetic member (51); the fixed clamping portion (111) and the movable clamping portion (112) are hinged, and the hinged portion is provided at one end of the clamping assembly (11) in the length direction; The clamping assembly (11) is further provided with a limiting member (54), which is used to fix the position of the magnetic member (51), and a gap is provided between the limiting member (54) and the magnetic member (51) in the width direction of the clamping assembly (11).

2. The rapid strength testing device for stretch wrap according to claim 1, characterized in that: The rapid strength detection device further comprises a support body (26), the support body (26) being used to connect the clamping assembly (11), the stretching drive assembly (12) and the stretching transmission assembly; The stretching transmission assembly comprises a screw connected to the stretching drive assembly (12), a transmission rod (31) connected to the screw, one end of the transmission rod (31) connected to the screw is provided with a transmission wheel (32) matching the screw, and the transmission rod (31) is provided with an external thread; the stretching transmission assembly also comprises a first slide (34) connected to the clamping assembly (11), and the first slide (34) is provided with an internal thread hole matching the external thread of the transmission rod (31); the stretching drive assembly (12) can drive the screw to rotate, thereby driving the transmission wheel (32) and the transmission rod (31) to rotate, and finally causing the first slide (34) and the clamping assembly (11) to translate along the length direction of the transmission rod (31).

3. The rapid strength testing device for stretch wrap according to claim 2, characterized in that: The rapid strength detection device comprises two sets of clamping assemblies (11), which respectively clamp two positions of the stretch film (13); the rapid strength detection device also comprises two sets of stretching transmission assemblies, which are respectively connected to the two sets of clamping assemblies (11); and the stretching drive assembly (12) can move the two sets of clamping assemblies (11) in a direction away from each other through the stretching transmission assembly, thereby stretching and extending the stretch film (13).

4. The rapid strength testing device for stretch wrap according to claim 2, characterized in that: The rapid strength detection device includes two sets of clamping assemblies (11), and the two sets of clamping assemblies (11) respectively clamp two positions of the stretch film (13); the rapid strength detection device also includes four sets of stretching transmission assemblies, and among the four sets of stretching transmission assemblies, two sets of stretching transmission assemblies are respectively connected to one clamping assembly (11) through a first slide (34); and the other two sets of stretching transmission assemblies are connected to another clamping assembly (11) through the first slide (34); Two first slides (34) connected to a clamping assembly (11) are arranged at two positions in the length direction of the fixed clamping portion (111). The stretching drive assembly (12) can move the two sets of clamping assemblies (11) in directions away from each other through the stretching transmission assembly. During the movement, the moving speeds of the two ends of the length direction of the two sets of clamping assemblies (11) are consistent.

5. The rapid strength testing device for stretch wrap according to claim 4, characterized in that: The rapid strength detection device further comprises two sets of stretching drive assemblies (12), wherein each of the two sets of stretching drive assemblies (12) is connected to two sets of stretching transmission assemblies; and the two sets of stretching transmission assemblies connected to the clamping assembly (11) are respectively connected to the two sets of stretching drive assemblies (12); An axial hole (43) is provided on the first slide (34), and the first slide (34) and the fixed clamping portion (111) are hinged through the axial hole (43); a sliding track (42) is provided on the fixed clamping portion (111) along the length direction of the clamping assembly (11); among the two first slides (34) connected to the clamping assembly (11), a track connecting portion (41) matching the sliding track (42) is provided on one of the first slides (34), and the first slide (34) and the fixed clamping portion (111) are slidably connected through the sliding track (42) and the track connecting portion (41), and the track connecting portion (41) can move along the length direction of the clamping assembly (11); The sliding rails (42) are protrusions arranged on both sides of the bottom of the fixed clamping portion (111), and the rail connecting portion (41) includes buckles that are engaged with the protrusions on both sides of the bottom of the fixed clamping portion (111); the stretching drive assembly (12) can move the two sets of clamping assemblies (11) in directions away from each other through the stretching transmission assembly, and during the movement process, the moving speeds of the two ends of the two sets of clamping assemblies (11) in the length direction are inconsistent.

6. The rapid strength testing device for stretch wrap according to claim 5, characterized in that: The first slide (34) and the track connection part (41) are hingedly connected via an axial hole (43); a protruding axial hole (43) is provided on the first slide (34), and the track connection part (41) is provided with a rotating shaft (44) whose shape and position match those of the axial hole (43); the first slide (34) and the track connection part (41) can be hingedly connected via the axial hole (43) and the rotating shaft (44).

7. The rapid strength testing device for stretch wrap according to claim 1, characterized in that: A shielding member (52) is provided between the magnetic member (51) and the pressure metering unit (53), and the shielding member (52) is used to reduce interference of the magnetic field of the magnetic member (51) on the pressure metering unit (53).

8. The rapid strength testing device for stretch wrap according to claim 1, characterized in that: An eccentric wheel is provided at the other end of the clamping assembly (11) in the longitudinal direction. The eccentric wheel is connected to a handle (55). The eccentric wheel can be rotated by the handle (55), thereby pushing the fixed clamping portion (111) and the movable clamping portion (112) to separate on the clamping surface and generate a gap.

9. A rapid strength testing device for stretch wrap according to any one of claims 1, 7, and 8, characterized in that: A plurality of magnetic members (51) are provided on the fixed clamping portion (111) and the movable clamping portion (112) along the length direction of the clamping assembly (11), and some or all of the plurality of magnetic members (51) are connected to pressure metering units (53).

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