Self-adaptive carton sealing machine

Abstract

The utility model relates to an adaptive carton sealing machine, which includes a frame, a lower carton sealing machine core and an upper carton sealing module. The adaptive carton sealing machine also includes a centering mechanism, which includes two centering beams, and a transmission assembly is arranged between the two centering beams. The transmission assembly includes two groups of pulleys and a centering transmission belt. The pulley group includes a left pulley, a right pulley, and a transmission wheel. The left pulley and the right pulley are respectively located on the left and right sides of the frame, and the transmission wheel is located on the side of the right pulley close to the middle of the frame. The centering transmission belt is wound and transmitted between the left pulley, the right pulley, and the transmission wheel of the two groups of pulleys. The purpose of the utility model is to solve or at least alleviate the problem that the existing carton sealing machine is prone to box deviation and asymmetric sealing of the tape and the carton during the box sealing process, and to provide an adaptive carton sealing machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of carton sealing equipment, and in particular relates to an adaptive carton sealing machine. Background Art

[0002] Packing boxes are mainly used to facilitate logistics, transportation, loading and unloading, and storage. Generally, wooden boxes and corrugated wood pallets are used. Tin barrels or tin barrels are also used. Paper boxes are the second most widely used. Nowadays, all kinds of goods need to be packed in boxes, and the boxes need to be sealed with tape. At present, there are large production lines with relatively mature sealing tape systems, which mainly wrap the outside of the box through a rotating mechanism to achieve the purpose of sealing the box. This method is very common.

[0003] The existing carton sealing machines have poor stability of the packaging boxes during the sealing process. The packaging boxes are easily moved after being subjected to external forces during the sealing process, resulting in asymmetry between the tape and the carton seal, and a loose seal, which usually requires manual alignment. For this purpose, a carton sealing machine is usually provided with a guide mechanism, for example, the utility model patent with announcement number CN108163282A and name of a tape carton sealing machine discloses a tape carton sealing machine, including an operating table with a support frame, a carton guide mechanism is arranged on the operating table, a rectangular groove is arranged on the operating table between the carton guide mechanisms, and a tape sealing mechanism is placed in the rectangular groove; when in use, the carton guide mechanism effectively prevents the deviation of the carton; the tape sealing mechanism can realize instant stop, and can be quickly reset after a carton is packaged, and directly continue the next packaging without adjustment operation; the utility model has stable and reliable working performance; the guide rod is connected by a spring, and the size can be changed at any time according to the size of the carton, and the disassembly and assembly operation is convenient; a single thrust transmission mode is adopted, and the machine is flexible, durable and safe to use; the cost is low, the structure is simple, the footprint is small, and it is easy to move; the packaging efficiency is high. However, its two guide rods are driven by four independent springs, and the two guide rods are not easy to be balanced, causing the box to deviate to one side, and to a certain extent, there will be asymmetry between the tape and the carton seal. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art, solve or at least alleviate the problems of box body deviation and asymmetric sealing of the tape and the carton during the box sealing process of the existing box sealing machine, and provide an adaptive box sealing machine.

[0005] The utility model is realized by the following technical solutions:

[0006] An adaptive carton sealing machine, comprising a frame, a lower carton sealing machine core and an upper carton sealing module, wherein the lower carton sealing machine core is arranged in the middle of the upper side of the frame, and the upper carton sealing module is arranged correspondingly above the lower carton sealing machine core and longitudinally slidably arranged on the frame, and the adaptive carton sealing machine also comprises a centering mechanism, wherein the centering mechanism comprises two centering beams, both of which are arranged along the length direction of the frame and are relatively mirror-imaged and arranged on both sides of the lower carton sealing machine core;

[0007] A transmission assembly is arranged between the two centering beams, and the transmission assembly includes two groups of pulley groups and a centering transmission belt. The two groups of pulley groups are respectively located at the front and rear ends of the lower box sealing mechanism and are correspondingly arranged at the front and rear of the centering beam. The pulley group includes a left pulley, a right pulley, and a transmission wheel. The left pulley, the right pulley, and the transmission wheel are all rotatably connected with the frame. The left pulley and the right pulley are respectively located on the left and right sides of the frame. The transmission wheel is located on the side of the right pulley close to the middle of the frame, and the transmission wheels of the two groups of pulley groups are located on the same side of the frame;

[0008] The centering transmission belt is wound and transmitted between the left pulley, the right pulley and the transmission wheel of the two pulley groups. The centering transmission belt is concave. The left pulley and the right pulley of the two pulley groups are respectively located at the four corners of the outer ring of the centering transmission belt. The transmission wheels of the two pulley groups are respectively located at the two corners of the concave end of the inner ring of the centering transmission belt. The front and rear sections of the outer ring of the centering transmission belt and the front and rear sections of the inner ring are respectively connected to two centering beams, and the front section of the outer ring and the front section of the inner ring of the centering transmission belt are respectively connected to different centering beams.

[0009] In order to further realize the utility model, the following technical solutions can be preferably selected:

[0010] Preferably, the centering mechanism further comprises a motor, which is drivingly connected to the left pulley of the pulley assembly located at the rear of the frame.

[0011] Preferably, the centering mechanism further comprises a tensioning mechanism, the tensioning mechanism comprising a tensioning rod, the tensioning rod being slidably arranged on the frame along the width direction of the frame, and the left pulley of the pulley group located at the front of the frame being rotatably arranged on the tensioning rod

[0012] Preferably, the centering mechanism further comprises two guide mechanisms, which are respectively located at the front and rear of the frame and are respectively arranged corresponding to the two pulley groups;

[0013] The guide mechanism comprises a guide rod and a guide block, wherein the guide rod is fixedly arranged on the frame body along the width direction of the frame body, and the guide block is slidably sleeved on the guide rod along the axial direction of the guide rod, and two guide blocks are sleeved on each guide rod, and the two guide blocks on the guide rod are respectively fixedly connected to the two centering beams;

[0014] The two guide blocks of the guide mechanism at the front are respectively fixedly connected to the front section of the outer ring and the front section of the inner ring of the centering transmission belt, and the two guide blocks of the guide mechanism at the rear are respectively fixedly connected to the rear section of the outer ring and the rear section of the inner ring of the centering transmission belt.

[0015] Preferably, a lifting mechanism is provided between the upper carton sealing module and the frame, the lifting mechanism comprising a lifting frame, a driving shaft and a belt assembly, the lifting frame is in an N-shape and is vertically arranged on the upper middle part of the frame, the driving shaft is rotatably arranged in the horizontal section of the lifting frame along the length direction of the horizontal section of the lifting frame, the two groups of the belt assemblies are respectively located in the two vertical sections of the lifting frame, and the two ends of the upper carton sealing module are respectively longitudinally slidably arranged in the two vertical sections of the lifting frame and connected to the two belt assemblies;

[0016] The belt assembly includes a lifting transmission belt, a driving wheel, a driven wheel and a counterweight. The driving wheel is located at the upper part of the vertical section of the lifting frame and is fixedly sleeved on the driving shaft. The driven wheel is located at the lower part of the vertical section of the lifting frame and is rotatably arranged on the lifting frame. The centering transmission belt is annular and is wound between the driving wheel and the driven wheel. One side of the centering transmission belt is connected to the upper box sealing module, and the counterweight is fixedly arranged on the other side of the centering transmission belt.

[0017] Preferably, the weight value of the counterweight block is equal to the weight value of the lifting module; when the lifting module is located in the middle of the vertical section of the lifting frame, the counterweight block is also located in the middle of the vertical section of the lifting frame.

[0018] Preferably, a plurality of rollers are arranged in an array along the length direction of the upper side of the frame, and the adaptive carton sealing machine further comprises two positioning assemblies, which are respectively located at the front and rear ends of the lower carton sealing machine core, and the positioning assembly comprises a mounting seat, a touch rod and a sensor body, the mounting seat is U-shaped and fixedly mounted in the middle of the conveying path of the frame, the touch rod is located between the two vertical sections of the mounting seat and the middle part thereof is rotatably arranged on the mounting seat, and the sensor body is fixedly mounted on the upper side of the horizontal section of the mounting seat;

[0019] When the material transported on the frame does not reach the touch sensor, the upper end of the touch rod extends out of the upper side of the roller of the frame, and the lower end of the touch rod is located at the detection end of the sensor body; when the material transported on the frame reaches the touch sensor, the material drives the touch rod to rotate during the transportation process, and the lower end of the touch rod is separated from the detection end of the sensor body.

[0020] Preferably, a roller is rotatably provided on the upper end of the touch rod, the upper part of the circumferential outer wall of the roller is located outside the upper end surface of the touch rod, the number of the rollers is two, and the two rollers are respectively located on both sides of the touch rod.

[0021] Preferably, the weight value of the lower section at the transition between the touch rod and the mounting seat is greater than the weight value of the upper section at the transition between the touch rod and the mounting seat.

[0022] Preferably, the positioning assembly further comprises an anti-roll bar, which is transversely arranged at the lower side of the roller and whose axial direction is perpendicular to the conveying direction of the frame, and the middle part of the anti-roll bar is embedded in the upper part of the vertical section of the mounting seat and is located on the side of the mounting seat away from the input direction of the frame;

[0023] A semicircular positioning groove is arranged on the upper part of the vertical section of the mounting seat, and the middle part of the anti-roll bar is in the shape of a round rod and is embedded in the positioning groove of the mounting seat.

[0024] Through the above technical solution, the beneficial effects of the utility model are:

[0025] The utility model is provided with two groups of pulley assemblies, and the left pulley and the right pulley of the two groups of pulley assemblies are connected by a centering transmission belt. The relative translation of the two centering beams can be controlled by a power source to avoid the phenomenon of asynchronous movement of the two centering beams.

[0026] In addition, the front and rear parts of the center beam are subjected to force synchronously to ensure the smooth movement of the center beam.

[0027] At the same time, the belt drive structure reacts faster and is more stable than the screw slider structure, cylinder or hydraulic cylinder structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a structural sectional view of the utility model;

[0030] Figure 3 For the utility model Figure 2 Sectional view at AA in the middle;

[0031] Figure 4 It is a structural cross-sectional view of the centering mechanism of the utility model;

[0032] Figure 5 For the utility model Figure 4 The enlarged view of the section view B at BB in the middle;

[0033] Figure 6 For the utility model Figure 4 Enlarged view of point C in the middle;

[0034] Figure 7 It is a schematic diagram of the assembly of the transmission assembly of the utility model;

[0035] Figure 8 It is a structural cross-sectional view of the lifting mechanism of the utility model;

[0036] Fig. 9 For the utility model Figure 8Sectional view at DD in the middle;

[0037] Fig.10 For the utility model Figure 8 Sectional view at EE;

[0038] Fig.11 It is a structural schematic diagram of the positioning component of the utility model;

[0039] Fig.12 It is a structural cross-sectional view of the positioning assembly of the utility model;

[0040] Fig.13 It is a structural schematic diagram of the mounting seat of the utility model;

[0041] Fig.14 It is a structural schematic diagram of the touch rod of the utility model;

[0042] Among them: 1-frame; 2-lower carton sealing mechanism; 3-upper carton sealing module; 4-centering beam; 5-left pulley; 6-right pulley; 7-drive wheel; 8-centering drive belt; 9-tensioning rod; 10-guide rod; 11-guide block; 12-lifting frame; 13-drive shaft; 14-lifting drive belt; 15-driving wheel; 16-driven wheel; 17-counterweight block; 18-mounting seat; 19-touch rod; 20-sensor body; 21-roller. DETAILED DESCRIPTION

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the following terms in the present invention can be understood according to specific circumstances.

[0044] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0045] like Figure 1-Figure 7As shown, an adaptive carton sealing machine comprises a frame 1, a lower carton sealing machine core 2 and an upper carton sealing module 3, wherein the lower carton sealing machine core 2 is arranged in the middle of the upper side of the frame 1, and the upper carton sealing module 3 is correspondingly arranged above the lower carton sealing machine core 2 and longitudinally slidably arranged on the frame 1, characterized in that the adaptive carton sealing machine also comprises a centering mechanism, the centering mechanism comprises two centering beams 4, the two centering beams 4 are arranged along the length direction of the frame 1 and are relatively mirror-imaged and arranged on both sides of the lower carton sealing machine core 2;

[0046] A transmission assembly is arranged between the two centering beams 4, and the transmission assembly includes two groups of pulley groups and a centering transmission belt 8. The two groups of pulley groups are respectively located at the front and rear ends of the lower sealing machine core 2 and are correspondingly arranged at the front and rear of the centering beam 4. The pulley group includes a left pulley 5, a right pulley 6, and a transmission wheel 7. The left pulley 5, the right pulley 6, and the transmission wheel 7 are all rotatably connected to the frame 1. The left pulley 5 and the right pulley 6 are respectively located on the left and right sides of the frame 1, and the transmission wheel 7 is located on the side of the right pulley 6 close to the middle of the frame 1. The transmission wheels 7 of the two groups of pulley groups are located on the same side of the frame 1;

[0047] The centering transmission belt 8 is wound around and transmitted between the left pulley 5, the right pulley 6 and the transmission wheel 7 of the two groups of pulley groups. The centering transmission belt 8 is concave. The left pulley 5 and the right pulley 6 of the two groups of pulley groups are respectively located at the four corners of the outer circle of the centering transmission belt 8. The transmission wheels 7 of the two groups of pulley groups are respectively located at the two corners of the concave end of the inner circle of the centering transmission belt 8. The front and rear sections of the outer circle and the front and rear sections of the inner circle of the centering transmission belt 8 are respectively connected to the two centering beams 4, and the front section of the outer circle and the front section of the inner circle of the centering transmission belt 8 are respectively connected to different centering beams 4.

[0048] In order to drive the centering transmission belt 8 to move, the centering mechanism also includes a motor, which is connected to the left pulley 5 of the pulley group located at the rear of the frame 1.

[0049] In order to prevent the centering transmission belt 8 from loosening, the centering mechanism also includes a tensioning mechanism, which includes a tensioning rod 9, which is slidably arranged on the frame 1 along the width direction of the frame 1, and the left pulley 5 of the pulley group located at the front of the frame 1 is rotated and arranged on the tensioning rod 9.

[0050] In order to further ensure the stability of the movement of the centering beam 4, the centering mechanism also includes two guide mechanisms, which are respectively located at the front and rear of the frame 1 and are respectively arranged corresponding to the two groups of pulleys;

[0051] The guide mechanism includes a guide rod 10 and a guide block 11. The guide rod 10 is fixedly arranged on the frame body 1 along the width direction of the frame body 1. The guide block 11 is axially slidably sleeved on the guide rod 10. Two guide blocks 11 are sleeved on each guide rod 10. The two guide blocks 11 on the guide rod 10 are respectively fixedly connected to the two centering beams 4.

[0052] The two guide blocks 11 of the guide mechanism at the front are respectively fixedly connected to the front section of the outer ring and the front section of the inner ring of the centering transmission belt 8, and the two guide blocks 11 of the guide mechanism at the rear are respectively fixedly connected to the rear section of the outer ring and the rear section of the inner ring of the centering transmission belt 8.

[0053] The utility model is provided with two groups of pulley groups, and the left pulley 5 and the right pulley 6 of the two groups of pulley groups are connected by a centering transmission belt 8. The relative translation of the two centering beams 4 can be controlled by a power source to avoid the phenomenon of asynchronous movement of the two centering beams 4.

[0054] In addition, the front and rear parts of the center beam 4 are subjected to force synchronously to ensure the stability of the movement of the center beam 4.

[0055] At the same time, the belt drive structure reacts faster and is more stable than the screw slider structure, cylinder or hydraulic cylinder structure.

[0056] like Figure 8-Figure 10 As shown, a lifting mechanism is arranged between the upper carton sealing module 3 and the frame body 1, and the lifting mechanism comprises a lifting frame 12, a driving shaft 13 and a belt assembly. The lifting frame 12 is n-shaped and vertically arranged on the upper side of the middle part of the frame body 1. The driving shaft 13 is arranged in the horizontal section of the lifting frame 12 and rotates along the length direction of the horizontal section of the lifting frame 12. Two groups of belt assemblies are respectively located in the two vertical sections of the lifting frame 12. The two ends of the upper carton sealing module 3 are respectively longitudinally slidably arranged in the two vertical sections of the lifting frame 12 and connected to the two belt assemblies.

[0057] The belt assembly includes a lifting transmission belt 14, a driving wheel 15, a driven wheel 16 and a counterweight 17. The driving wheel 15 is located at the upper part of the vertical section of the lifting frame 12 and is fixedly fitted on the drive shaft 13. The driven wheel 16 is located at the lower part of the vertical section of the lifting frame 12 and is rotatably arranged on the lifting frame 12. The centering transmission belt 8 is annular and is wound between the driving wheel 15 and the driven wheel 16. One side of the centering transmission belt 8 is connected to the upper box sealing module 3, and the counterweight 17 is fixedly arranged on the other side of the centering transmission belt 8.

[0058] In order to optimize the product structure and ensure the reaction speed of lifting, the weight value of the counterweight block 17 is equal to the weight value of the lifting module; when the lifting module is located in the middle of the vertical section of the lifting frame 12, the counterweight block 17 is also located in the middle of the vertical section of the lifting frame 12.

[0059] At present, the upper box sealing module 3 is mostly driven to rise and fall directly by a pneumatic cylinder or a hydraulic cylinder. The reaction speed of the pneumatic cylinder or the hydraulic cylinder structure is relatively slow, resulting in a low box sealing efficiency.

[0060] The utility model drives two lifting transmission belts 14 to move synchronously through the driving shaft 13 , and the two lifting transmission belts 14 exert force on both ends of the upper box sealing module 3 respectively to ensure the stability of the upper box sealing module 3 when it is lifted and lowered.

[0061] The belt drive structure has a faster reaction speed and is more stable than the cylinder or hydraulic cylinder structure. The utility model is also provided with a counterweight block 17, the weight of which offsets the weight of the upper box sealing module 3, so that the lifting drive belt 14 operates in a zero-gravity state, further improving the reaction speed during lifting, thereby improving the box sealing efficiency.

[0062] like Figure 11-Figure 14 As shown, in order to control the movement of the two centering beams 4, a plurality of rollers are arranged in an array along the length direction of the upper side of the frame 1, and the adaptive carton sealing machine also includes two positioning components, which are respectively located at the front and rear ends of the lower carton sealing machine core 2, and the positioning components include a mounting seat 18, a touch rod 19 and a sensor body 20. The mounting seat 18 is U-shaped and fixedly installed in the middle of the conveying path of the frame 1, the touch rod 19 is located between the two vertical sections of the mounting seat 18 and the middle part thereof is rotatably arranged on the mounting seat 18, and the sensor body 20 is fixedly installed on the upper side of the horizontal section of the mounting seat 18;

[0063] When the material transported on the frame 1 does not reach the touch sensor, the upper end of the touch rod 19 extends out of the upper side of the roller of the frame 1, and the lower end of the touch rod 19 is located at the detection end of the sensor body 20; when the material transported on the frame 1 reaches the touch sensor, the material drives the touch rod 19 to rotate during the transportation process, and the lower end of the touch rod 19 is separated from the detection end of the sensor body 20.

[0064] In order to optimize the product structure and improve stability, a roller 21 is rotatably provided on the upper end of the touch rod 19. The upper part of the circumferential outer wall of the roller 21 is located outside the upper end surface of the touch rod 19. There are two rollers 21, which are respectively located on both sides of the touch rod 19.

[0065] In order to make the touch rod 19 return to its original position automatically, the weight value of the lower section of the touch rod 19 and the mounting seat 18 is greater than the weight value of the upper section of the touch rod 19 and the mounting seat 18.

[0066] A torsion spring may also be provided at the junction of the touch rod 19 and the mounting seat 18 , so that the lower end of the touch rod 19 is located at the detection end of the sensor body 20 through the torsion spring.

[0067] In order to ensure the stability and reliability of the positioning assembly during operation, the positioning assembly further includes an anti-roll bar, which is transversely arranged at the lower side of the roller and whose axial direction is perpendicular to the conveying direction of the frame 1. The middle part of the anti-roll bar is embedded in the upper part of the vertical section of the mounting seat 18 and is located on the side of the mounting seat 18 away from the input direction of the frame 1.

[0068] A semicircular positioning groove is provided on the upper part of the vertical section of the mounting seat 18 , and the middle part of the anti-roll bar is in the shape of a round rod and is embedded in the positioning groove of the mounting seat 18 .

[0069] Conventional positioning components usually use travel switches, distance sensors and photoelectric comparison sensors. Among them, the travel switch is a contact sensor, which has a slow response speed and a relatively low life span, and cannot be used for conveying equipment with a higher conveying speed. Both the distance sensor and the photoelectric comparison sensor are non-contact sensors, and both have the advantages of fast response speed and long service life. The distance sensor is usually set above the conveying equipment, and determines whether a box passes by the height of the irradiation surface. Due to its own detection range, it is only suitable for the transportation of a box of a certain fixed specification. When the box is of various sizes, it is easy to make a misjudgment; the photoelectric comparison sensor is usually set in pairs on both sides of the conveying equipment, and the position of the box is determined by detecting whether there is an obstruction between the two photoelectric comparison sensors. However, the distance between the two photoelectric comparison sensors is mostly equal to or greater than the width of the conveying equipment. The distance is large, and there may be debris such as paper attached to the box, which is also easy to cause misjudgment.

[0070] In this embodiment, the sensor body 20 is a beam-receiving optical coupling sensor and is connected to the motor signal of the centering mechanism. The detection end of the sensor body 20 is U-shaped, and the opening of the detection end of the sensor body 20 faces the input direction of the frame 1.

[0071] The utility model ensures the accuracy of judgment by the direct contact of the touch rod 19. At the same time, the lower end of the touch rod 19 is correspondingly arranged at the detection end of the sensor body 20. The two cooperate in close range to avoid external interference. The utility model combines the advantages of non-contact sensors and contact sensors. It not only has a high response speed and can improve the sealing efficiency, but also has good stability and a long service life.

[0072] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive carton sealing machine, comprising a frame (1), a lower carton sealing machine core (2) and an upper carton sealing module (3), wherein the lower carton sealing machine core (2) is arranged in the middle of the upper side of the frame (1), and the upper carton sealing module (3) is arranged correspondingly above the lower carton sealing machine core (2) and is longitudinally slidably arranged on the frame (1), characterized in that: The adaptive carton sealing machine further comprises a centering mechanism, the centering mechanism comprising two centering beams (4), the two centering beams (4) are arranged along the length direction of the frame (1) and are arranged on both sides of the lower carton sealing machine core (2) in a mirror-like manner; A transmission assembly is arranged between the two centering beams (4), the transmission assembly comprising two groups of pulley assemblies and a centering transmission belt (8), the two groups of pulley assemblies are respectively located at the front and rear ends of the lower box sealing mechanism (2) and are correspondingly arranged at the front and rear of the centering beam (4), the pulley assembly comprises a left pulley (5), a right pulley (6), and a transmission wheel (7), the left pulley (5), the right pulley (6), and the transmission wheel (7) are all rotatably connected to the frame (1), the left pulley (5) and the right pulley (6) are respectively located on the left and right sides of the frame (1), the transmission wheel (7) is located on the side of the right pulley (6) close to the middle of the frame (1), and the transmission wheels (7) of the two groups of pulley assemblies are located on the same side of the frame (1); The centering transmission belt (8) is wound and transmitted between the left pulley (5), the right pulley (6) and the transmission wheel (7) of the two pulley groups. The centering transmission belt (8) is concave in shape. The left pulley (5) and the right pulley (6) of the two pulley groups are respectively located at the four corners of the outer ring of the centering transmission belt (8). The transmission wheels (7) of the two pulley groups are respectively located at the two corners of the concave end of the inner ring of the centering transmission belt (8). The front and rear sections of the outer ring and the front and rear sections of the inner ring of the centering transmission belt (8) are respectively connected to the two centering beams (4). The front section of the outer ring and the front section of the inner ring of the centering transmission belt (8) are respectively connected to different centering beams (4).

2. The adaptive carton sealing machine according to claim 1, characterized in that: The centering mechanism also includes a motor, which is drivingly connected to a left pulley (5) of a pulley assembly located at the rear of the frame (1).

3. The adaptive carton sealing machine according to claim 2, characterized in that: The centering mechanism further comprises a tensioning mechanism, the tensioning mechanism comprising a tensioning rod (9), the tensioning rod (9) being slidably disposed on the frame body (1) along the width direction of the frame body (1), and the left pulley (5) of the pulley assembly located at the front of the frame body (1) being rotatably disposed on the tensioning rod (9).

4. The adaptive carton sealing machine according to claim 1, characterized in that: The centering mechanism further comprises two guide mechanisms, the two guide mechanisms are respectively located at the front and rear of the frame (1) and are respectively arranged corresponding to the two pulley groups; The guide mechanism comprises a guide rod (10) and a guide block (11); the guide rod (10) is fixedly arranged on the frame body (1) along the width direction of the frame body (1); the guide block (11) is slidably sleeved on the guide rod (10) along the axial direction of the guide rod (10); two guide blocks (11) are sleeved on each guide rod (10); and the two guide blocks (11) on the guide rod (10) are respectively fixedly connected to the two centering beams (4); The two guide blocks (11) of the guide mechanism located at the front are respectively fixedly connected to the outer ring front section and the inner ring front section of the centering transmission belt (8), and the two guide blocks (11) of the guide mechanism located at the rear are respectively fixedly connected to the outer ring rear section and the inner ring rear section of the centering transmission belt (8).

5. The adaptive carton sealing machine according to claim 1, characterized in that: A lifting mechanism is arranged between the upper carton sealing module (3) and the frame (1), the lifting mechanism comprising a lifting frame (12), a driving shaft (13) and a belt assembly, the lifting frame (12) being n-shaped and vertically arranged on the upper middle side of the frame (1), the driving shaft (13) being rotatably arranged in the horizontal section of the lifting frame (12) along the length direction of the horizontal section of the lifting frame (12), the two groups of the belt assemblies being respectively arranged in the two vertical sections of the lifting frame (12), and the two ends of the upper carton sealing module (3) being respectively longitudinally slidably arranged in the two vertical sections of the lifting frame (12) and connected to the two belt assemblies; The belt assembly comprises a lifting transmission belt (14), a driving wheel (15), a driven wheel (16) and a counterweight (17); the driving wheel (15) is located at the upper part of the vertical section of the lifting frame (12) and is fixedly sleeved on the driving shaft (13); the driven wheel (16) is located at the lower part of the vertical section of the lifting frame (12) and is rotatably arranged on the lifting frame (12); the centering transmission belt (8) is annular and is wound between the driving wheel (15) and the driven wheel (16); one side of the centering transmission belt (8) is connected to the upper box sealing module (3); and the counterweight (17) is fixedly arranged on the other side of the centering transmission belt (8).

6. The adaptive carton sealing machine according to claim 5, characterized in that: The weight value of the counterweight block (17) is equal to the weight value of the lifting module; when the lifting module is located in the middle of the vertical section of the lifting frame (12), the counterweight block (17) is also located in the middle of the vertical section of the lifting frame (12).

7. The adaptive carton sealing machine according to claim 1, characterized in that: A plurality of rollers are arranged in an array along the length direction of the upper side of the frame (1), and the adaptive carton sealing machine also includes two positioning components, which are respectively located at the front and rear ends of the lower carton sealing machine core (2), and the positioning components include a mounting seat (18), a touch rod (19) and a sensor body (20). The mounting seat (18) is U-shaped and fixedly installed in the middle of the conveying path of the frame (1), the touch rod (19) is located between two vertical sections of the mounting seat (18) and the middle part thereof is rotatably arranged on the mounting seat (18), and the sensor body (20) is fixedly installed on the upper side of the horizontal section of the mounting seat (18); When the material transported on the frame (1) does not reach the touch sensor, the upper end of the touch rod (19) extends out of the upper side of the roller of the frame (1), and the lower end of the touch rod (19) is located at the detection end of the sensor body (20); when the material transported on the frame (1) reaches the touch sensor, the material drives the touch rod (19) to rotate during the transport process, and the lower end of the touch rod (19) is separated from the detection end of the sensor body (20).

8. The adaptive carton sealing machine according to claim 7, characterized in that: A roller (21) is rotatably provided at the upper end of the touch rod (19), the upper portion of the circumferential outer wall of the roller (21) is located outside the upper end surface of the touch rod (19), the number of the rollers (21) is two, and the two rollers (21) are respectively located on both sides of the touch rod (19).

9. The adaptive carton sealing machine according to claim 7, characterized in that: The weight value of the lower section at the transition point between the touch rod (19) and the mounting seat (18) is greater than the weight value of the upper section at the transition point between the touch rod (19) and the mounting seat (18).

10. The adaptive carton sealing machine according to claim 7, characterized in that: The positioning assembly further comprises an anti-roll bar, which is arranged transversely on the lower side of the roller and whose axial direction is perpendicular to the conveying direction of the frame (1); the middle part of the anti-roll bar is embedded in the upper part of the vertical section of the mounting seat (18) and is located on the side of the mounting seat (18) away from the input direction of the frame (1); A semicircular positioning groove is provided on the upper part of the vertical section of the mounting seat (18); the middle part of the anti-roll bar is in the shape of a round rod and is embedded in the positioning groove of the mounting seat (18).

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