Cargo strapping method and strapping machine

Abstract

The application provides a cargo bundling and packing method and a bundling machine. The cargo bundling and packing method comprises: a belt feeding and collecting process, in which the bundling machine feeds a packing belt so that the packing belt is wrapped around the outer surface of cargo to be bundled; a tensioning process, in which the packing belt is tensioned until the tension on the packing belt reaches a preset tension value; a lengthening process, in which the packing belt is continuously tensioned so that the lengthening amount of the packing belt reaches a preset lengthening value ΔL; and a cutting and welding process, in which the packing belt is cut and the two ends of the packing belt that overlap with each other are welded. The bundling tightness is improved, and the bundling quality and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of strapping machines, in particular to a cargo strapping and packaging method and a strapping machine. BACKGROUND

[0002] At present, with the continuous development of the logistics industry, the cargo usually needs to be packaged by packaging tape before transportation. For example, Chinese patent publication No. CN101778771 A discloses a packaging machine with improved tensioning, sealing and feeding device, which uses a packaging head with floating function for packaging, but the packaging tape is still not balanced. The strapping machine heads disclosed in Chinese patent publication Nos. CN112722388A, CN111392093A and CN211002019U can pull the packaging tape in both directions to make the packaging tape balanced, so that each surface of the to-be-strapped article can be more effectively tightened by the packaging tape. However, in the process of use, the packaging tape is usually made of PET or other plastic materials. In the process of strapping and packaging, after the packaging tape is tightened on the outer surface of the to-be-strapped article and reaches the preset tension value, the two ends of the packaging tape can be cut and welded, and the packaging tape is completed on the surface of the cargo. However, after the packaging is completed, due to the difference in elastic deformation of the packaging tape caused by the difference in elastic deformation of the packaging tape, the elastic retraction amount of the packaging tape is different, which causes the packaging tape to not be effectively tightened, resulting in loose and loose strapping, which reduces the strapping quality and the strapping reliability. Therefore, how to design a technology to improve the strapping tightness to improve the strapping quality and reliability is a technical problem to be solved by the present application. Figure 1 SUMMARY

[0003] The present application provides a cargo strapping and packaging method and a strapping machine, which can improve the strapping tightness to improve the strapping quality and reliability.

[0004] The present application provides a cargo strapping and packaging method, which comprises:

[0005] The belt feeding and collecting process, the strapping machine feeds the packaging tape so that the packaging tape surrounds the outer surface of the to-be-strapped cargo;

[0006] The tensioning process, the packaging tape is tensioned until the tension of the packaging tape reaches the preset tension value;

[0007] The lengthening process, the tension on the packaging tape is continued to be applied to make the stretching lengthening amount of the packaging tape reach the preset lengthening value ΔL;

[0008] ​The cutting and welding process cuts the packing belt and welds the two ends of the packing belt overlapped together.

[0009] The application also provides a strapping machine, which comprises a packaging chute and a machine head; the machine head is configured to form a conveying channel for conveying the packing belt together with the packaging chute, and is also used for conveying and welding the packing belt; the machine head is provided with a tensioning mechanism configured to tension the packing belt around the goods to a preset tension value; the machine head is also provided with an elongation mechanism configured to elongate the packing belt to the preset tension value.

[0010] By tensioning the packing belt during the strapping and packaging process, the elastic deformation of the packing belt has a retracting function, and the elongation of the tensioned packing belt is further processed, and the elastic deformation of the additional retracted part of the packing belt is used to compensate for the relaxation of the packing belt caused by the excess amount of the packing belt in the machine head and the retraction amount of the goods caused by the extrusion, so as to ensure that the goods are tightly strapped by the packing belt, and the strapping tightness is improved to improve the strapping quality and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the strapping machine head of the application;

[0012] Figure 2 It is a structural schematic diagram of the strapping machine head of the application;

[0013] Figure 3 It is Figure 1 It is an explosion view of the strapping machine head of the application;

[0014] Figure 4 It is Figure 1 It is a structural schematic diagram of the welding module of the application;

[0015] Figure 5 It is Figure 1 It is a sectional view of the welding module of the application;

[0016] Figure 6 It is Figure 1 It is a sectional view of the welding module of the application;

[0017] Figure 7 It is Figure 1 It is a sectional view of the welding module of the application;

[0018] Figure 8 It is Figure 4 It is a structural schematic diagram of the welding module of the application without the maintenance cover plate;

[0019] Figure 9 It is Figure 4 It is a sectional view of the welding module of the application;

[0020] Figure 10 is Figure 9 partial enlarged view of region A in the middle;

[0021] Figure 11 is Figure 9 partial enlarged view of region B in the middle;

[0022] Figure 12 is Figure 9 partial enlarged view of region C in the middle;

[0023] Figure 13 is Figure 4 structure diagram of the welding module in the maintenance state;

[0024] Figure 14 is Figure 1 structure diagram of the installation module;

[0025] Figure 15 is Figure 1 structure diagram of the installation module;

[0026] Figure 16 is Figure 1 structure diagram of the feeding belt module;

[0027] Figure 17 is Figure 1 structure diagram of the feeding belt module;

[0028] Figure 18 is Figure 16 structure diagram of the feeding belt module in the maintenance state;

[0029] Figure 19 is Figure 16 structure diagram of the feeding belt module without the front panel;

[0030] Figure 20 is Figure 16 assembly diagram of the second detection switch, the second pressing plate and the installation block;

[0031] Figure 21 is the ratio curve diagram of the tension and the deformation in the existing technology;

[0032] Figure 22 is the ratio curve diagram of the tension and the deformation in the present application;

[0033] Figure 23 is the structure principle diagram of the strapping machine in the present application;

[0034] Figure 24Fig. 2 is a schematic diagram of a structure of a strapping machine according to the present application;

[0035] Figure 25 Fig. 3 is a schematic diagram of a structure of a strapping machine according to the present application;

[0036] Figure 26 Fig. 4 is a schematic diagram of a structure of a strapping machine according to the present application. DETAILED DESCRIPTION

[0037] The present application will be described in detail below with reference to the accompanying drawings.

[0038] In an embodiment, the present application provides a method for strapping and packing goods, comprising:

[0039] The feeding and collecting step, the strapping machine feeds the packing belt so that the packing belt is wrapped around the outer surface of the goods to be strapped.

[0040] Specifically, in the feeding and collecting step, the strapping machine first arranges the packing belt around the outer periphery of the goods, and then tightens the packing belt so that the packing belt adheres to the outer surface of the goods.

[0041] The tensioning step, the packing belt is tensioned until the tension of the packing belt reaches a preset tension value.

[0042] Specifically, in the tensioning step, the packing belt wrapped around the outer surface of the goods is tensioned by an external force, and the packing belt adheres to the surface of the goods and exerts a certain pressure on the goods. In the tensioning step, the packing belt is continuously subjected to the external force until the tension of the packing belt reaches a preset tension value F1. The preset tension value F1 can be designed according to the specific packing conditions of the goods. After the goods are packed, the goods in the effective packing state are continuously subjected to the tensioning force of the packing belt to maintain the goods in the effective strapping state. Therefore, the preset tension value F1 can be the continuous tensioning force required by the packing belt to maintain the goods in the effective strapping state, that is, to maintain the safety of the goods during storage and transportation.

[0043] The lengthening step, the packing belt is continuously subjected to the tensioning force so that the elongation of the packing belt reaches a preset lengthening value AL.

[0044] Specifically, after the tensioning step is completed, the packing belt adheres to the surface of the goods, and at this time, the packing belt has not completely separated from the strapping machine. That is, although the packing belt exerts a tensioning force on the goods, there is a gap between the head of the strapping machine and the surface of the goods. At this time, if the packing belt separates from the head, the packing belt will relax. At the same time, after the packing belt is tensioned, the gap between the goods will decrease due to the extrusion of the packing belt, and the packing belt will relax.

[0045] Therefore, at least for the above two reasons, the packing belt after tensioning treatment will be relaxed, so after the tensioning process is completed, the packing belt is further subjected to a lengthening process. The lengthening process will continue to apply tension to the packing belt to further elastically deform and be further lengthened until the tensile elongation reaches the preset lengthening value AL.

[0046] The cutting and welding process cuts the packing belt and welds the two ends of the packing belt overlapped together.

[0047] Specifically, after the packing belt is lengthened, the packing belt is subjected to welding and cutting, etc. For details, please refer to the conventional packing process of cutting and welding the packing belt, which is not limited here. After the cutting and welding of the packing belt are completed, the packing belt will elastically deform to provide a continuous and effective binding force to the goods to ensure that the goods are effectively and firmly bound.

[0048] After the cutting and welding process is completed, the packing belt is separated from the head of the binding machine and adheres to the corresponding surface of the goods.

[0049] Reference Figure 21 As shown, the stress or elastic deformation change of the packing belt after the packing belt is bound and packed in the conventional technology. According to the curve of the deformation of the packing belt and the tension, the deformation is basically proportional to the tension in the initial stage of the stress of the packing belt. When the tension of the packing belt reaches a certain tension value, the deformation caused by the increase of the tension of the packing belt increases significantly until the packing belt is broken.

[0050] The deformation and tension curves of the packing belts produced in different batches are different. Taking the packing belt S1 and the packing belt S2 in the figure as an example. Under the premise of effectively binding the goods, the minimum effective tension value of the packing belt on the surface of the goods is F0 after the packing belt is bound.

[0051] The tension of the packing belt S1 at the position with small tension increase but large deformation is smaller than the tension of the packing belt S1 at the position with small tension increase but large deformation.

[0052] Taking the original tension F` of the packing belt S1 designed to effectively bind the goods as an example, the packing belt S1 is subjected to a tension value F` through the binding machine, and then the packing belt S1 is completed by welding and cutting. The packing belt S1 is separated from the binding machine. At this time, the packing belt S1 will produce an original shrinkage of AL` due to relaxation. Correspondingly, the tension of the packing belt S1 bound on the surface of the goods is FS1, which is greater than F0, so the packing belt S1 is in an effective binding state.

[0053] When the same baling machine uses the packing belt S2 to bale the same goods, because the original tension F` is unchanged, the packing belt S2 will produce the same amount of relaxation as the packing belt S1 after it is separated from the baling machine, that is, △L`. However, the tension FS2 of the packing belt S2 baled on the surface of the goods is obviously lower than F0, so the packing belt S2 cannot effectively and firmly bale the goods.

[0054] Reference Figure 22 As shown, the force or elastic deformation change of the packing belt after baling by the goods baling and packing method of the present application. Similarly, taking the packing belt S1 and the packing belt S2 produced in different batches as examples, the differences between them are explained.

[0055] Among them, the tension required by the packing belt for effectively baling the same type of goods is different. Therefore, the preset tension value F1 is matched with the corresponding goods, that is, the continuous tension generated by the packing belt after baling the goods meets the condition of the goods being effectively baled. Among them, the preset tension value F1 can be not less than the minimum effective tension value F0.

[0056] In the actual baling operation process, taking the packing belt S1 as an example, the tension of the packing belt S1 reaches F1 in the tensioning process, and then the lengthening process is carried out. In the lengthening process, the packing belt S1 is further lengthened by △L, at which time the increase amount of the tension of the packing belt S1 is small. Then, the packing belt S1 completes welding and cutting and is separated from the baling machine. At this time, the packing belt S1 will produce an original relaxation amount of △L` due to relaxation. Correspondingly, the tension FS1 of the packing belt S1 baled on the surface of the goods is greater than F0, so the packing belt S1 is in the state of effective baling.

[0057] Similarly, for the packing belt S2. The tension of the packing belt S2 reaches F1 in the tensioning process, and then the lengthening process is carried out. In the lengthening process, the packing belt S2 is further lengthened by △L, at which time the increase amount of the tension of the packing belt S2 is small. Then, the packing belt S2 completes welding and cutting and is separated from the baling machine. At this time, the packing belt S2 will produce an original relaxation amount of △L` due to relaxation. Correspondingly, the tension FS2 of the packing belt S2 baled on the surface of the goods is greater than F0, so the packing belt S2 is also in the state of effective baling.

[0058] In this way, during the baling process, the differences in the elastic deformation characteristics of different batches of packing belts will not lead to uneven baling quality, so as to ensure that the goods can be well baled. Moreover, the relaxation amount of the elastic deformation of the extra length of the packing belt is used to compensate for the relaxation amount of the packing belt caused by the excess amount produced by the lifting of the packing belt in the machine head and the relaxation amount caused by the extrusion of the goods, so as to ensure that the goods are tightly baled by the packing belt.

[0059] In order to obtain the value of △L quickly and conveniently, the value of △L can be estimated according to the outer circumference of the goods, that is, the outer circumference of the goods to be bundled is L0; △L: L0 = (1-5):400. Alternatively, the value of △L is not less than the excess amount of the packing belt in the machine head and the shrinkage amount of the goods under extrusion.

[0060] In an embodiment, for the tensioning process, the specific process is to apply tension to both ends of the packing belt respectively; the ratio of the tension increment of the packing belt to the stretching elongation of the packing belt in the tensioning process is k1; the specific process of the lengthening process is to apply tension to both ends of the packing belt respectively; the ratio of the tension increment of the packing belt to the stretching elongation of the packing belt in the lengthening process is k2; wherein k1>k2.

[0061] Specifically, by applying tension to both ends of the packing belt respectively, the packing belt can be evenly bundled outside the goods to reduce the uneven force of the packing belt caused by friction, thereby improving the quality of the packing and bundling.

[0062] In addition, after the packing belt is separated from the bundling machine, the packing belt is tightly attached to the outer surface of the goods, and the packing belt exerts pressure on the corners of the goods.

[0063] Specifically, after the packing belt is completely separated from the bundling machine and is attached to the outer surface of the goods, since the extra lengthening part of the packing belt compensates for the excess amount of the packing belt in the machine head and the shrinkage amount of the goods under extrusion, the packing belt has a continuous tension on the goods after being bundled on the surface of the goods, thereby making the packing belt always exert pressure on the corners of the goods to tighten the goods.

[0064] Based on the above-mentioned goods bundling and packing method, in order to realize the above-mentioned goods bundling and packing method, the following structural design and improvement are made for the bundling machine.

[0065] As shown in Figure 23 The bundling machine comprises a packaging chute 100 and a machine head 200; the machine head is configured to cooperate with the packaging chute to form a conveying channel for conveying the packing belt, the machine head is provided with a belt feeding module 2 and a welding module 3, the belt feeding module 2 is used to complete the belt feeding of the packing belt in the conveying channel, and the welding module 3 is used to weld and cut the packing belt.

[0066] The machine head is provided with a tensioning mechanism 210, which is configured to tension the packing belt around the goods to make the tension of the packing belt reach a preset tension value;

[0067] The machine head is also provided with an elongation mechanism 220, which is configured to elongate the packing strap that has reached a preset tensile value.

[0068] Specifically, in actual use, the goods 1000 move into the conveying channel formed by the packaging chute 100 and the machine head 200. The strapping module 2 conveys the strapping along the conveying channel to perform the strapping operation, so that the strapping wraps around the outer periphery of the goods.

[0069] Then, the tensioning mechanism 210 tensions the strapping. During the tensioning process, the strapping detaches from the packaging chute 100 and adheres tightly to the surface of the goods. The tensioning mechanism 20 applies tension to the strapping until a preset tension value is reached.

[0070] The further action of the stretching mechanism 220 will continuously apply external force to the strapping, causing it to be further stretched. During the operation of the stretching mechanism 220, the strapping has not yet completely detached from the strapping machine. That is, although the strapping exerts tension on the goods, there is a certain gap between the strapping machine head and the surface of the goods. If the strapping detaches from the machine head at this time, it will become loose. At the same time, after the strapping is tightened, the gap between the goods will also decrease due to the compression of the strapping, causing the strapping to loosen further.

[0071] The excess material created by the strapping during tensioning in the machine head, along with the shrinkage caused by the compression of the goods, causes the strapping to loosen after being released from the machine head. Therefore, after tensioning, a further stretching process can be performed on the strapping. The stretching mechanism 220 applies tension to the strapping, causing further elastic deformation and stretching until the elongation reaches the preset value ΔL.

[0072] There are various structures for configuring the tensioning mechanism 210 and the elongation mechanism 220 on the machine head 200, which will be described below with reference to the attached drawings.

[0073] like Figure 23 As shown, the machine head also includes: an installation module 1, a belt feeding module 2, and a welding module 3. The installation module includes an installation base; the belt feeding module forms a belt feeding channel and is configured to convey packing straps; the welding module is configured to cut and weld the packing straps; wherein the welding module and the belt feeding module are disposed on the installation base and are movable relative to each other.

[0074] In one embodiment, the tensioning mechanism can be a separate component, i.e., the tensioning mechanism is configured to drive the welding module and the feeding module away from each other so that the tension on the packing strap reaches a preset tension value.

[0075] Specifically, the tensioning mechanism is a first telescopic mechanism disposed between the welding module and the feeding module. After the feeding module completes the feeding operation, the first telescopic mechanism is activated to move the welding module 3 and the feeding module 2 away from each other, so as to achieve the purpose of tightening the packing strap.

[0076] The stretching mechanism 220 can be a second telescopic mechanism mounted on the moving part of the first telescopic mechanism, with the moving part of the second telescopic mechanism connected to the welding module or the feeding module. Specifically, after the tensioning mechanism 210 completes the tensioning action of the packing strap through the first telescopic mechanism, the stretching mechanism 220, through the action of the second telescopic mechanism, further separates the welding module 3 and the feeding module 2 to stretch the packing strap.

[0077] The first telescopic mechanism and the second telescopic mechanism can be devices such as cylinders or electric actuators.

[0078] Or, such as Figure 24 As shown, the tape feeding module 2 includes a tape feeding housing 21, a tape feeding wheel 22, and a tape feeding motor 23. The tape feeding wheel is rotatably disposed in the tape feeding housing, and the tape feeding channel is formed between the tape feeding wheel and the tape feeding housing. The tape feeding motor is configured to rotate in the forward direction to drive the tape feeding wheel to rotate and feed the tape. The tape feeding motor is also configured to rotate in the reverse direction after the tensioning mechanism is activated to drive the tape feeding wheel to stretch the packing tape. The tape feeding wheel and the tape feeding motor form the stretching mechanism.

[0079] Specifically, the pull-out module is integrated into the feeding module 2. The feeding motor in the feeding module 2 drives the feeding wheel to reverse, thereby stretching the packing strap.

[0080] In another embodiment, the elongation mechanism can be a separate component, similarly based on... Figure 24 As shown, the feeding roller and feeding motor can be used as a tensioning mechanism. Correspondingly, the elongation mechanism uses a telescopic mechanism to drive the welding module 3 and the feeding module 2 to move away from each other in order to elongate the packing strap.

[0081] In yet another embodiment, such as Figure 25 As shown, the tensioning mechanism 210 and the elongation mechanism 220 can be integrated into the same module, which includes a motor 13 and a ball screw 14.

[0082] The mounting base is provided with a slidable sliding seat 12, the ball screw is threadedly connected to the sliding seat, and the welding module or the tape feeding module is provided on the sliding seat;

[0083] The motor is configured to drive the ball screw to rotate so as to make the welding module and the tape feeding module move away from each other to tighten the packing tape to a preset tension value, and is further configured to continue to drive the ball screw to rotate to elongate the packing tape.

[0084] Specifically, in use, after the tape feeding operation is completed by the tape feeding module 2, the motor 13 drives the ball screw to rotate so as to make the sliding seat slide on the mounting base, thereby realizing the relative moving away of the welding module 3 and the tape feeding module 2 to tighten the packing tape. After the packing tape reaches the preset tension value, the motor 13 continues to drive the ball screw to rotate so as to make the packing tape be further elongated by a preset distance.

[0085] In another embodiment, as shown in Figure 26 the handpiece further comprises a housing 230, a second tape feeding wheel 240 rotatably arranged in the housing, a welding module 3 and a second motor (not shown) arranged on the housing, and the housing forms the tape feeding channel around the outer periphery of the second tape feeding wheel.

[0086] The second motor is configured to drive the second tape feeding wheel to feed the packing tape in forward rotation, and is further configured to reverse rotate to first tighten the packing tape and then elongate the packing tape; wherein the second motor and the second tape feeding wheel constitute the tensioning mechanism and the elongating mechanism integrated into one module.

[0087] Specifically, in use, the second motor is forward rotated to drive the second tape feeding wheel 240 to rotate to realize the tape feeding operation. After the tape feeding operation is completed, the second motor is reversed, and then the packing tape is reversely pulled by the reversed second tape feeding wheel 240, and the tension of the packing tape during the reverse rotation of the second motor will reach the preset tension value. Then, the second motor will continue to reverse to make the packing tape be continuously pulled to elongate until the newly added elongation reaches the preset elongation value.

[0088] In actual use, the second tape feeding wheel 240 can be a single rotating wheel, or, in order to improve the tensioning force of the packing tape, the second tape feeding wheel 240 can comprise a first tape feeding wheel 241 and a second tape feeding wheel 242, the second motor is forward rotated to drive the first tape feeding wheel 241 to feed the packing tape, and the second motor is reversed to reversely pull the packing tape by the second tape feeding wheel 242.

[0089] In embodiment two, based on the above-mentioned embodiment one, for the strapping head, as shown in Figure 1As shown, it generally comprises a mounting module 1, a tape feeding module 2 and a welding module 3. Among them, the mounting module 1 is used as a bearing component to mount the tape feeding module 2 and the welding module 3, and the strapping head is assembled to the strapping machine through the mounting module 1. The tape feeding module 2 is used to drive the packaging tape to advance, and after the packaging tape is driven by the tape feeding module 2 to pass through the welding module 3 and wrap around the goods, the end of the packaging tape is guided back to the welding module 3 through the tape feeding module 2. The welding module 3 is used to weld and cut the overlapping area of the packaging tape formed in it, so as to make the packaging tape end-to-end connection to form a ring structure and be tied on the surface of the goods.

[0090] The specific way of feeding the packaging tape through the tape feeding module 2 and cutting and welding through the welding module 3 can refer to the conventional technology, which is not limited and described here.

[0091] The structure improvement design of the mounting module 1, the tape feeding module 2 and the welding module 3 in the strapping head is described in combination with the drawings.

[0092] For the welding module 3, during long-term use, because the welding module 3 needs to weld the packaging tape, the moving parts of the welding module 3 and the debris generated by the packaging tape during welding need to be regularly maintained and cleaned.

[0093] In order to facilitate the operator to maintain and clean the welding module 3 quickly without disassembling the welding module 3 excessively, the welding module 3 is designed as follows.

[0094] As shown in FIG. 1, the welding module 3 is composed of a welding module body 31, a welding module cover 32 and a welding module base 33. Figures 4-12As shown, the welding module 3 comprises a welding housing 31, a main shaft 32, a clamping mechanism 33, a welding mechanism 34 and a driving component 35; the welding housing 31 comprises a housing 311 and an access cover 312, a surface of the housing 311 is provided with a mounting groove 3111, the mounting groove 3111 forms an access opening (not labeled) on the surface of the housing 311, the access cover 312 is arranged on the housing and is configured to cover the access opening, the access cover 312 comprises a first access plate 3121, an upper end of the first access plate 3121 is rotatably arranged on the housing; the main shaft 32 is transversely arranged and rotatably arranged on the housing 311, the main shaft 32 is provided with a first cam 321 and a second cam 322, the first cam 321 and the second cam 322 are located in the mounting groove 3111; the welding mechanism 34 comprises a moving welding block 341 and a static welding block 342 arranged oppositely, the clamping mechanism 33 comprises a sliding clamping block 331 and a fixed clamping block 332 arranged oppositely; the clamping mechanism 33 and the welding mechanism 34 are arranged on the welding housing 31, the access cover 312 is configured to cover the outside of the first cam 321, the second cam 322 and the moving welding block 341 in the closed state; the motor 13 is configured to drive the main shaft 32 to rotate, the first cam 321 is configured to drive the moving welding block 341 to approach the static welding block 342, and the second cam 322 is configured to drive the sliding clamping block 331 to approach the fixed clamping block 332.

[0095] Wherein, the welding module 3 and the tape feeding module 2 are arranged on the mounting base 11, and the welding module 3 and the tape feeding module 2 are relatively movable.

[0096] Specifically, in use, the clamping mechanism 33 is used to compress the packing tape when the packing tape is tensioned and welded and cut, and when the packing tape needs to be compressed, the main shaft 32 is rotated to drive the second cam 322 to press the sliding clamping block 331 to approach the fixed clamping block 332, so that the packing tape is clamped between the sliding clamping block 331 and the fixed clamping block 332. For the welding mechanism 34, in use, the overlapping part of the packing tape between the moving welding block 341 and the static welding block 342 is welded, before welding, the rotating shaft is rotated to move the moving welding block 341 to approach the static welding block 342, so that the overlapping part of the packing tape is clamped between the moving welding block 341 and the static welding block 342.

[0097] And in the process of long-term use, for the moving welding block 341, regular maintenance and replacement are needed due to welding loss, and similarly, in the process of conveying and welding the packing tape, the debris generated by the packing tape also exists in the mounting groove 3111.

[0098] When maintenance is needed, the movable welding block 341 and the debris in the installation groove 3111 can be cleaned, and the maintenance cover plate 312 can be flipped open to expose the movable welding block 341 in the installation groove 3111, so that the movable welding block 341 can be repaired and replaced without excessive disassembly of the welding module 3. At the same time, after the maintenance cover plate 312 is opened, the bottom area of the maintenance opening is exposed, and the operator can clean the debris in the installation groove 3111, thereby reducing the disassembly of the components and even achieving the effect of maintenance without disassembly.

[0099] In addition, during use, when the moving parts in the installation groove 3111 need to be lubricated, the maintenance cover plate 312 can also be flipped open to facilitate the operator to lubricate the cam, main shaft 32 and other components.

[0100] Since the first cam, the second cam, the sliding clamping block and the movable welding block are all arranged in the installation groove and located in the maintenance area formed by the maintenance opening, only the maintenance cover plate needs to be removed from the welding housing, and all the moving parts in the installation groove can be repaired and maintained in the maintenance area formed by the maintenance opening.

[0101] In some embodiments, to avoid the maintenance cover plate 312 being opened randomly by external force during the conveying process, the welding module 3 further comprises a reset spring configured to exert a flipping closing elastic force on the maintenance cover plate 312.

[0102] Specifically, when not subjected to external force, the maintenance cover plate 312 is in a normally closed state under the action of the reset spring, that is, the maintenance cover plate 312 covers the entire maintenance opening.

[0103] During normal conveying, the maintenance cover plate 312 is in a closed state under the action of the reset spring, and at this time, the maintenance cover plate 312 covers the maintenance opening. On the one hand, it ensures the smoothness and reliability of the conveying, and on the other hand, it ensures the safety and reliability of use.

[0104] By providing a maintenance cover plate that can be flipped open on the welding housing of the welding module, when maintenance is needed during later use, the position of the movable welding block can be exposed by opening the maintenance cover plate, so that the operator can better maintain the movable welding block. After the maintenance cover plate is opened, it is also convenient for the operator to clean and maintain the cam on the rotating shaft and the debris in the installation groove, thereby effectively reducing the difficulty of maintenance and improving the convenience of repair.

[0105] Further, the clamping mechanism 33 comprises at least two lower clamping mechanisms 3301 arranged at the lower part of the housing 311, each of the lower clamping mechanisms 3301 comprises a sliding clamping block 331 and a fixed clamping block 332 arranged oppositely, the lower clamping mechanisms 3301 are located below the main shaft 32, and the welding mechanism 34 is located between the two lower clamping mechanisms 3301; the first maintenance plate 3121 is further configured to cover the outside of the sliding clamping block 331 of the lower clamping mechanism 3301 in the closed state.

[0106] Specifically, the two lower clamping mechanisms 3301 are used to clamp the packaging belt during the welding of the packaging belt, so as to ensure that the overlapping part of the packaging belt can be welded together by the welding mechanism 34. The two lower clamping mechanisms 3301 are distributed on both sides of the welding mechanism 34, and thus after the maintenance cover plate 312 is opened, the two lower clamping mechanisms 3301 can also be exposed at the same time to facilitate the maintenance personnel to maintain the sliding clamping block 331 of the two lower clamping mechanisms 3301.

[0107] In an embodiment, the installation position relationship of the sliding clamping block 331 and the fixed clamping block 332 in the lower clamping mechanism 3301 and the installation position relationship of the dynamic welding block 341 and the static welding block 342 in the welding mechanism 34 are designed as follows.

[0108] The sliding clamping block 331 and the dynamic welding block 341 are arranged in the installation groove 3111, the sliding clamping block 331 of the lower clamping mechanism 3301 is located above the corresponding fixed clamping block 332, and the dynamic welding block 341 is located above the static welding block 342; the fixed clamping block 332 of the lower clamping mechanism 3301 and the static welding block 342 are arranged at the lower end of the first maintenance plate 3121; the main shaft 32 is provided with a third cam 323 configured to drive the first maintenance plate 3121 to rotate.

[0109] Specifically, the sliding clamping block 331 and the dynamic welding block 341 are arranged in the installation groove 3111 and are driven by the corresponding cam to slide in the installation groove 3111 to approach the fixed clamping block 332 and the static welding block 342. It can be known that, with reference to the conventional technical solution, the sliding clamping block 331 and the dynamic welding block 341 can be reset by the spring without being extruded by the protrusion. That is, the sliding clamping block 331 and the fixed clamping block 332 are away from each other without being extruded and pushed by the cam, and similarly, the dynamic welding block 341 and the static welding block 342 are away from each other.

[0110] Wherein, since the fixed clamping block 332 and the static welding block 342 are arranged at the lower end of the first maintenance plate 3121, after the wrapping belt is wrapped around the goods and the welding operation is completed, the main shaft 32 rotates to drive the first maintenance plate 3121 to be opened against the elastic force of the reset spring through the third cam 323, so that the wrapping belt is separated from the surface of the fixed clamping block 332 and the static welding block 342.

[0111] That is, the first maintenance plate 3121 in the present application plays a role in covering the moving welding block 341 and other moving parts to facilitate later maintenance, and also plays a role in installing the fixed clamping block 332 and the static welding block 342 to meet the requirements of component installation. In addition, cooperating with the driving of the third cam 323, the wrapping belt wrapped around the outer surface of the goods can be released after the welding operation is completed. The diversification of the functions of the first maintenance plate 3121 makes the overall structure more compact, which is more conducive to reducing the overall volume.

[0112] Further, the bottom side of the shell 311 is provided with an upper and lower arranged belt inlet hole 3101 and a belt inlet gap 3102, and the other side of the bottom of the shell 311 is provided with a belt outlet gap 3103; the lower end of the first maintenance plate 3121 is provided with a mounting plate 3122, and the fixed clamping block 332 and the static welding block 342 of the lower clamping mechanism 3301 are detachably arranged on the mounting plate 3122; the lower part of the first maintenance plate 3121 is further provided with a through hole 3120, and the welding module 3 further comprises a rotating plate 3123, the upper end of the rotating plate 3123 is rotatably arranged on the shell, and the lower end of the rotating plate 3123 is provided with a spacing piece 3124; the fourth cam 324 is arranged on the main shaft 32, and the fourth cam 324 is configured to drive the first rotating plate maintenance plate to rotate; wherein, when the first maintenance plate 3121 and the rotating plate 3123 are both in the closed state, the mounting plate 3122 covers the lower part of the belt inlet gap 3102 and the belt outlet gap 3103, the spacing piece 3124 is inserted into the through hole 3120 and located between the moving welding block 341 and the static welding block 342, and the spacing piece 3124 is configured to guide the wrapping belt entering from the belt inlet hole 3101 to be guided and conveyed from the upper surface of the spacing piece 3124 to the belt outlet gap 3103.

[0113] Specifically, the welding machine shell 31 is configured with a belt inlet hole 3101 and a belt inlet gap 3102 near the belt feeding module 2, and is configured with a belt outlet gap 3103 away from the belt feeding module 2. The wrapping belt conveyed from the belt feeding module 2 enters the welding machine shell 31 through the belt inlet hole 3101 and is output into the wrapping chute in the wrapping machine through the belt outlet gap 3103 for wrapping around the goods, and finally the wrapping belt is guided by the belt feeding module 2 to enter the welding machine shell 31 again through the belt inlet gap 3102, and the moving welding block 341 and the static welding block 342 form an overlapping area of the wrapping belt.

[0114] As shown in Figures 9-12 the sending process, the rotating plate 3123 is in a closed state, so that the spacer 3124 is located between the moving welding block 341 and the static welding block 342, thereby forming two channels between the moving welding block 341 and the static welding block 342. After the packaging belt is input from the input hole 3101, it is transported to the output gap 3103 from the upper surface of the spacer 3124, and after the packaging belt surrounds the goods, it enters and is transported to the lower part of the spacer 3124 through the input gap 3102, and the packaging belt forms an overlapping part at the upper and lower parts of the spacer 3124.

[0115] After the sending operation of the packaging belt is completed, the main shaft 32 rotates to push the rotating plate 3123 outward by the fourth cam 324 before welding, so that the spacer 3124 is separated from between the moving welding block 341 and the static welding block 342, so that the overlapping packaging belts can be squeezed and welded together by the welding mechanism.

[0116] In order to facilitate the smooth transportation of the packaging belt in the welding shell 31, referring to Figure 9 the orientation of the lower clamping mechanism 3301 in the figure. The sliding clamping block 331 adjacent to the input hole 3101 on the Figure 9 left side is provided with a belt passing hole 3311, and the spacer 3124 is arranged obliquely between the two sliding clamping blocks 331, and the upper end of the spacer 3124 is adjacent to the lower edge of the belt passing hole 3311.

[0117] Specifically, during the packaging belt passing process, the packaging belt input from the input hole 3101 passes through the left sliding clamping block 331 through the belt passing hole 3311 and is guided to pass through the gap between the sliding clamping block 331 and the fixed clamping block 332 in the right lower clamping mechanism 3301 through the surface of the spacer 3124 and is output from the output gap 3103. The packaging belt surrounds the goods and enters the gap between the sliding clamping block 331 and the fixed clamping block 332 in the left lower clamping mechanism 3301 through the input gap 3102 again, and finally the free end of the packaging belt is transported to the area between the spacer 3124 and the static welding block 342 to complete the sending.

[0118] In order to position the free end of the packaging belt, a limiting block 3125 is further arranged below the lower end of the spacer 3124, and the limiting block 3125 is arranged on the mounting plate 3122 and located between the static welding block 342 and the corresponding fixed clamping block 332.

[0119] Specifically, the limiting block 3125 is arranged on the same side of the spacer sheet 3124 and the static welding block 342, and thus the free end of the packing belt entering between the spacer sheet 3124 and the static welding block 342 can be limited by the side surface of the limiting block 3125.

[0120] In addition, in order to smoothly guide the packing belt to be conveyed from the upper surface of the spacer sheet 3124 to the belt outlet gap 3103, a guide block 3112 is further arranged above the limiting block 3125, the guide block 3112 is arranged in the mounting groove 3111 and located between the dynamic welding block 341 and the sliding clamping block 331 on the corresponding side, and the bottom surface of the guide block 3112 forms a guide surface (not labeled) configured to extend downwardly and obliquely along the conveying direction of the packing belt.

[0121] Specifically, a guide channel is formed between the guide block 3112 and the limiting block 3125, so that the packing belt conveyed from the upper surface of the spacer sheet 3124 is guided into the right lower clamping mechanism 3301 via the guide surface of the guide block 3112 and the upper surface of the limiting block 3125 and finally output from the belt outlet gap 3103.

[0122] Further, in order to effectively tension the packing belt, the top of the welding machine shell 31 is provided with a belt guide channel 3113 configured to guide the packing belt to be conveyed into the belt feeding module 2; the clamping mechanism 33 further includes an upper clamping mechanism 3302 located above the main shaft 32, the upper clamping mechanism 3302 includes a fixed clamping block 332 and a sliding clamping block 331 arranged oppositely, and the upper clamping mechanism 3302 is configured to clamp the packing belt conveyed via the belt guide channel 3113.

[0123] The maintenance cover plate 312 further includes a second maintenance plate 3126 which is detachably arranged on the shell 311 and located above the first maintenance plate 3121, and the second maintenance plate 3126 is configured to cover the outside of the sliding clamping block 331 of the upper clamping mechanism 3302.

[0124] Specifically, in order to facilitate maintenance of the upper clamping mechanism 3302 arranged on the top, the maintenance cover plate 312 further includes a second maintenance plate 3126 which can be detachably mounted on the shell 311 by screws or the like and covers the maintenance opening.

[0125] The following will be described in combination with the accompanying drawings Figures 5-7 The state of the welding module 3 during the feeding, tensioning and welding of the packing belt will be described.

[0126] As Figure 5As shown, during the process of conveying the packing belt, the first access plate 3121 and the rotating plate 3123 are both in the closed state, at this time, the spacer 3124 is spaced between the movable welding block 341 and the static welding block 342, the packing belt is input from the belt input hole 3101, sequentially passes through the belt passing hole 3311, the upper surface of the spacer 3124, the clamping space formed by the right lower clamping mechanism 3301, and is output from the belt output gap 3103 to the external packaging chute; the packing belt conveyed from the packaging chute is guided to enter the belt input gap 3102 through the belt feeding module 2 and is conveyed to the lower side of the spacer 3124 through the clamping space formed by the left lower clamping mechanism 3301 and is blocked by the limiting stop block 3125.

[0127] As shown, Figure 6 Before the packing belt is tensioned, the main shaft 32 rotates through the fourth cam 324 to make the rotating plate 3123 turn outward, so that the spacer 3124 is separated from between the movable welding block 341 and the static welding block 342. At the same time, the upper clamping mechanism 3302 and the left lower clamping mechanism 3301 clamp the packing belt, so that the packing belt can be tensioned. During the process of tensioning the packing belt, the belt feeding module 2 and the welding module 3 are separated from each other, so that the packing belt is tightly wound on the surface of the goods. After the packing belt is tightly wound, the welding operation can be performed, and the movable welding block 341 and the static welding block 342 are cooperated to make the overlapping part of the packing belt welded together.

[0128] As shown, Figure 7 After the welding is completed, the packing belt needs to be separated from the welding module 3, at this time, the main shaft 32 rotates to drive the first access plate 3121 to turn outward through the third cam 323, and then the packing belt slides off from the fixed clamping block 332 installed on the mounting plate 3122 and the surface of the static welding block 342, thereby realizing the separation of the packing belt and the welding module 3.

[0129] In some embodiments, the performance entity of the welding mechanism 34 can adopt heating welding or friction welding and the like.

[0130] In the heating welding mode, the movable welding block 341 is provided with an electric heating component (not shown), and the electric heating component heats and welds the overlapping part of the packing belt.

[0131] In the friction welding mode, a plurality of friction protrusions (not marked) are respectively arranged on the opposite surfaces of the movable welding block 341 and the static welding block 342, and the welding module 3 further includes a driving component two 343, which is configured to drive the movable welding block 341 to reciprocally rub relative to the static welding block 342.

[0132] Further, in order to achieve the requirements of miniaturization and compact design, the driving component one 35 and the driving component two 343 arranged on the welding module 3 can be installed on the back of the shell 311. For this purpose, the back of the shell 311 is provided with a mounting bracket 3114, and the driving component one 35 and the driving component two 343 are arranged on the mounting bracket 3114.

[0133] Specifically, the driving component one 35 and the driving component two 343 are installed and fixed through the mounting bracket 3114 on the back of the shell 311, and the shell 311 is further installed and fixed on the mounting module 1 through the mounting bracket 3114. In this way, the space in the front-back thickness direction is fully utilized to install the driving component one 35 and the driving component two 343, thereby reducing the space occupation in the left-right length direction.

[0134] As shown in Figure 13 In order to ensure that the movable components in the clamping mechanism 33 and the welding mechanism 34 can reliably slide in the mounting groove 3111, mounting guards 3115 can also be arranged above and below the main shaft 32, respectively, which shield and protect the outer sides of the sliding clamping block 331 and the movable welding block 341. In this way, when maintenance is required, the operator can remove the mounting guard 3115 at the corresponding position after opening the maintenance cover plate 312, and then replace and maintain the sliding clamping block 331 and the movable welding block 341.

[0135] In the preferred embodiment, in order to reduce the frequency of cleaning the debris in the mounting groove 3111, the top of the mounting groove 3111 is also provided with a first air nozzle 3116, which is arranged to blow air downward.

[0136] Specifically, during use, the first maintenance plate 3121 and the rotating plate 3123 will be intermittently opened for maintenance. At this time, the first air nozzle 3116 is in communication and blows air downward, so that when the first maintenance plate 3121 and the rotating plate 3123 are opened, the debris is blown out of the mounting groove 3111 in time by the blowing of the first air nozzle 3116. In this way, on the one hand, the frequency of the operator cleaning the debris in the mounting groove 3111 is reduced, and on the other hand, the wear of the moving components in the mounting groove 3111 caused by the debris is reduced, thereby reducing the frequency of maintenance and replacement.

[0137] As shown in Figures 14-15 The mounting module 1 includes a mounting base 11, a sliding seat 12, and a motor 13. The sliding seat 12 is slidably arranged on the mounting base 11, and the driving component is arranged to drive the sliding seat 12 to reciprocate on the mounting base 11. The tape feeding module 2 is detachably arranged on the mounting base 11, and the welding module 3 is detachably arranged on the sliding seat 12.

[0138] Specifically, for the installation module 1, the tape feeding module 2 and the welding module 3, a modular design is adopted. The tape feeding module 2 is detachably mounted on the installation base 11, and the welding module 3 is detachably mounted on the sliding seat 12.

[0139] Among them, the motor 13 is integrated on the installation base 11, and the motor 13 is used to drive the sliding seat 12 to slide on the installation base 11, so as to meet the requirement of relative sliding between the tape feeding module 2 and the welding module 3.

[0140] Further, in order to meet the requirement of convenient disassembly and assembly, for the welding module 3, the assembly mode with the installation module 1 can adopt the following structure design to reduce the amount of bolts used.

[0141] One side of the sliding seat 12 is provided with a plug-in part 121, and the other side of the sliding seat 12 is provided with a fixing hole 122; one side of the welding machine shell 31 is provided with a plug-in matching part 313, and the other side of the welding machine shell 31 is provided with a mounting hole (not shown); wherein the plug-in part 121 and the plug-in matching part 313 are inserted together, and the bolt passes through the mounting hole and is connected with the fixing hole 122.

[0142] Specifically, in the assembly process, the welding machine shell 31 needs to be fixed on the sliding seat 12, one side of the welding machine shell 31 is connected with the plug-in part 121 through the plug-in matching part 313, and the other side is fixed and connected by inserting the bolt into the mounting hole and the fixing hole 122. In this way, during assembly, only one side of the welding machine shell 31 needs to be bolted, which can effectively reduce the amount of bolts used.

[0143] And in the disassembly process, only the bolt in the mounting hole needs to be removed, and the welding machine shell 31 is pulled out obliquely to make the plug-in part 121 and the plug-in matching part 313 separate from each other.

[0144] Among them, for the specific way of fixing the welding machine shell 31 on the sliding seat 12 by the bolt: way one, the fixing hole 122 is a threaded hole, and the bolt is screwed in the threaded hole; way two, the bolt passes through the fixing hole 122 and is screwed with a nut.

[0145] Further, for the motor 13, the specific performance entity can adopt a conventional driving device such as a motor or a pneumatic cylinder.

[0146] Specifically, when the motor 13 adopts a motor, as shown in Figure 14 the rotating shaft of the motor is connected with the sliding seat 12 through the ball screw 14. In use, the motor reverses to drive the screw in the ball screw 14 to rotate or reverse, so as to realize the reciprocating movement of the sliding seat 12.

[0147] When motor 13 uses a drive cylinder, such as Figure 15 As shown, the piston rod of the drive cylinder is connected to the sliding seat 12. During use, controlling the extension and retraction of the drive cylinder allows for convenient and quick control of the reciprocating sliding of the sliding seat 12. To further facilitate control of the drive cylinder's movement, an air control valve 15 can be installed on the mounting base 11, and this air control valve is connected to the drive cylinder via an air pipe.

[0148] Furthermore, in order to ensure the smooth sliding of the sliding seat 12, a guide rail 16 is also provided on the mounting base 11. The sliding seat 12 is slidably mounted on the guide rail 16, and limit switches 17 are respectively provided at both ends of the guide rail 16.

[0149] Specifically, the mounting base 11 is equipped with a guide rail 16 to mount the sliding seat 12, ensuring smooth sliding of the sliding seat 12 on the mounting base 11. The travel range of the sliding seat 12 can be precisely controlled by configuring a limit switch 17. Especially when the motor 13 is a motor, the limit switch 17 controls the on / off state of the motor.

[0150] Furthermore, a first connecting plate 123 is provided on the side of the sliding seat 12 closest to the motor 13, and a plug-in portion 121 is provided on the first connecting plate 123; a second connecting plate 124 is provided on the side of the sliding seat 12 away from the motor 13, and the second connecting plate 124 and the first connecting plate 123 are arranged opposite to each other, and a fixing hole 122 is provided on the second connecting plate 124.

[0151] Specifically, a first connecting plate 123 and a second connecting plate 124 are provided on the surface of the sliding seat 12. The first connecting plate 123 has an opening to form a plug-in part 121. Correspondingly, a protruding structure is provided on the welding housing 31 to form a plug-in mating part 313. The protruding structure can be inserted into the opening on the first connecting plate 123.

[0152] Furthermore, for the tape feeding module 2, which is directly mounted and fixed on the mounting base 11, in order to make the overall structure more compact, a support frame 20 can be provided on the back of the tape feeding module 2. The support frame 20 is detachably mounted on the base.

[0153] Specifically, a support frame 20 is provided on the back of the tape feeding module 2 to enable it to be mounted on the mounting base plate. The support frame 20 allows the tape feeding module 2 to span across the motor 13, thus meeting the requirements of a compact overall design. The support frame 20 forms a clearance space in which the motor 13 is located.

[0154] like Figures 16-20As shown, the tape feeding module 2 comprises a tape feeding housing 21, a tape feeding wheel 22 and a tape feeding motor 23; the tape feeding housing 21 comprises a front panel 211, a back panel 212 and a tape feeding component 213, the back panel 212 is provided with a hinge 214 on one side, the front panel 211 is arranged on the hinge 214, the tape feeding wheel 22 is rotatably arranged on the back panel 212, the tape feeding component 213 is arranged on the back panel 212, a tape feeding groove 2130 is formed on the tape feeding component 213, the inner side of the tape feeding component 213 is provided with a first notch 2131 communicating with the tape feeding groove 2130, and the tape feeding wheel 22 is rotatably arranged on the back panel 212 at the first notch 2131;

[0155] In the closed state of the front panel 211, the front panel 211 and the back panel 212 are arranged oppositely, the tape feeding component 213 and the guide wheel are located between the front panel 211 and the back panel 212, and the tape feeding groove 2130 forms the tape feeding channel between the front panel 211 and the back panel 212.

[0156] Specifically, for the tape feeding module 2, after long-time conveying of the packing tape, the debris in the tape feeding groove 2130 needs to be cleaned and the tape feeding wheel needs to be maintained, at this time, the front panel 211 can be opened in the flipped manner to expose the tape feeding groove 2130 and the tape feeding wheel 22, so as to facilitate the cleaning and maintenance of the operator.

[0157] During the tape feeding process, the tape feeding wheel 22 is in contact with the packing tape through the first notch 2131, and under the driving action of the tape feeding motor 23, the tape feeding wheel 22 rotates to drive the packing tape to slide and convey in the tape feeding groove 2130.

[0158] Among them, since one side of the front panel 211 is mounted on the hinge 214, the front panel 211 needs to be reliably closed during use. Therefore, the side of the front panel 211 away from the hinge 214 can be connected to the back panel 212 by bolts.

[0159] In order to conveniently limit the other side of the front panel 211, the other side of the back panel 212 is provided with a resilient clamping jaw 215; in the closed state of the front panel 211, the resilient clamping jaw 215 is clamped on the edge of the front panel 211.

[0160] Specifically, during the use of the tape feeding module 2, on the one hand, it needs to be regularly cleaned and maintained, and on the other hand, it also needs to be adjusted and combed in time when the packing tape is clamped in the tape feeding groove 2130. Therefore, the other side of the front panel 211 is positioned and fixed by the resilient clamping jaw 215, and when the operator needs to open the front panel 211, he only needs to pull the front panel 211 to open the front panel 211.

[0161] And, during the conveying of the packaging tape, the front panel 211 is in a closed state, and the elastic clamping jaw 215 can firmly clamp the edge of the front panel 211 to ensure that the front panel 211 reliably covers the tape conveying component 213 and the tape wheel 22.

[0162] Further, in order to ensure that the tape wheel 22 can reliably drive the conveying by the tape wheel 22, the outer side of the tape conveying component 213 is provided with a second notch 2132 communicating with the tape conveying groove 2130; the tape module 2 further comprises a wheel carrier 24, a pressing wheel 25 and a pressing spring 26, the wheel carrier 24 is rotatably arranged on the tape housing 21 and located at the outer side of the tape conveying component 213, the pressing wheel 25 is rotatably arranged on the wheel carrier 24 and located at the second notch 2132, and the pressing spring 26 is abutted against the wheel carrier 24 and configured to exert a spring force on the wheel carrier 24 so that the pressing wheel 25 is abutted against the tape wheel 22.

[0163] Specifically, the wheel carrier 24 is installed outside the front panel 211 and the rear back panel 212 and can drive the pressing wheel 25 to rotate. Under the action of the pressing spring 26, the edge of the pressing wheel 25 can extend into the tape conveying groove 2130 through the second notch 2132 and abut against the tape wheel 22.

[0164] During the conveying of the packaging tape, the packaging tape is clamped between the tape wheel 22 and the pressing wheel 25 to ensure that the tape wheel 22 can provide effective driving force to the packaging tape to make the packaging tape conveyed in the tape conveying groove 2130.

[0165] Further, the tape module 2 further comprises a third driving component 27 configured to drive the wheel carrier 24 to drive the pressing wheel 25 away from the tape wheel 22.

[0166] Specifically, during normal tape conveying, the pressing spring 26 exerts a spring force on the wheel carrier 24 to make the pressing wheel 25 press against the tape wheel 22. When the strapping head is in the process of tightening the packaging tape, the third driving component 27 drives the wheel carrier 24 to rotate to make the pressing wheel 25 away from the tape wheel 22, thereby ensuring that the packaging tape can be reliably tightened.

[0167] The third driving component 27 comprises a first air cylinder 271 and a swing arm 272, the swing arm 272 is provided with a protruding structure (not labeled), one end of the swing arm 272 is rotatably installed on the tape housing 21, the first air cylinder 271 is hinged to the other end of the swing arm 272 and the tape housing 21, and the protruding structure abuts against the free end of the wheel carrier 24.

[0168] When it is needed to drive the wheel carrier 24 to rotate to make the pressing wheel 25 away from the tape wheel 22, the first air cylinder 271 drives the swing arm 272 to rotate to lift the wheel carrier 24 by the protruding structure, thereby making the pressing wheel 25 away from the tape wheel 22.

[0169] Further, the tape feeding component 213 comprises an outer guide strip (not labeled) and an inner guide strip (not labeled), which are arranged on the back plate 212 respectively, and a tape feeding groove 2130 is formed between the outer guide strip and the inner guide strip.

[0170] Specifically, in order to facilitate processing, the tape feeding component 213 is formed by the inner guide strip and the outer guide strip arranged inside and outside to form the tape feeding groove 2130.

[0171] In order to form the first gap 2131 and the second gap 2132, the outer guide strip comprises a first outer side guide strip 2133 and a second outer side guide strip 2134, which are arranged at intervals, and the second gap 2132 is formed between the first outer side guide strip 2133 and the second outer side guide strip 2134; the inner guide strip comprises a first inner side guide strip 2135 and a second inner side guide strip 2136, which are arranged at intervals, and the first gap 2131 is formed between the first inner side guide strip 2135 and the second inner side guide strip 2136.

[0172] Further, in order to facilitate guiding the packing tape from the welding module 3 into the tape feeding module 2 and accurately returning to the welding module 3, the tape feeding channel is in an overall arc structure, and the inlet and the outlet of the tape feeding channel are located on the same side of the tape feeding shell 21.

[0173] The tape feeding module 2 further comprises an auxiliary tape groove 28, which is arranged at the bottom of the tape feeding shell 21 and below the tape feeding channel. Moreover, the auxiliary tape groove 28 is in an overall strip structure, and the outlet of the auxiliary tape groove 28 is below the outlet of the tape feeding channel.

[0174] Further, the tape feeding shell 21 is further provided with a detection mechanism 29, which comprises a second air cylinder 291 and a first detection switch 292, the second air cylinder 291 is arranged vertically, the lower end of the piston rod of the second air cylinder 291 is provided with a first pressing plate 293, one side of the first pressing plate is provided with a first flange structure 294, and the first detection switch is arranged on the tape feeding shell 21 and is configured to detect the position of the first flange structure.

[0175] Specifically, in actual use, the tape feeding module needs to be as close to the goods as possible during the process of feeding and welding the packing tape by the bundling head of the bundling machine. Therefore, the bundling head needs to be moved close to the goods during operation and then perform operations such as feeding, tensioning and welding. In order to accurately control the moving stroke of the whole bundling head during the process of moving close to the goods, a second air cylinder 291 with a first pressing plate 293 is configured to control the distance.

[0176] That is, when the first pressing plate 293 abuts against the goods during the movement of the bundling head towards the goods, the first pressing plate 293 is limited by the goods so that the piston rod of the second cylinder 291 can be retracted by the internal air pressure, and during the retraction, the first detection switch 292 can detect the first flange structure 294 to trigger the stop of the movement of the bundling head, thereby ensuring that the distance between the bundling head and the goods is within the set range.

[0177] In order to slow down the movement speed of the bundling head after approaching the goods, a magnetic control switch (not shown) can be arranged on the second cylinder 291, and a magnet is arranged on the inner end of the piston rod of the second cylinder 291 to cooperate with the magnetic control switch.

[0178] Specifically, since the second cylinder 291 is always ventilated during use, the magnetic control switch is arranged on the cylinder body of the second cylinder 291 and close to the inner end of the piston rod in the extended state. When the first pressing plate 293 abuts against the goods to retract the piston rod, the magnet leaves the detection area of the magnetic control switch, and the movement speed of the bundling head is slowed down for more accurate control of the position of the bundling head in the stop state.

[0179] The movement of the bundling head on the bundling machine can refer to the conventional bundling machine, and the specific control process is not limited and described here.

[0180] Further, in order to detect whether the packaging belt outside the goods is broken in time during the tightening and welding of the packaging belt, the detection mechanism 29 further comprises a second detection switch 295, a second pressing plate 296, an elastic reset member (not shown) and a mounting block 297. The second detection switch 295 is arranged on the mounting block 297, the second pressing plate 296 is rotatably arranged on the mounting block 297 and configured to trigger the second detection switch 295 after being rotated under force, and the elastic reset member is arranged between the second pressing plate 296 and the mounting block 297.

[0181] During use, when the bundling head tightens the packaging belt, the packaging belt is separated from the tape feeding module and the welding module 3 of the bundling head and is tightened outside the goods, and the separated packaging belt is pressed on the second pressing plate 296 and makes the second pressing plate 296 adhere to the surface of the goods. The second pressing plate 296 is rotated under the pulling of the packaging belt and triggers the second detection switch 295.

[0182] The second pressing plate 296 is always pressed on the surface of the goods before the bundling machine head is not moved to reset. If the packing belt is broken, the second pressing plate 296 is reset under the action of the elastic reset member because the packing belt does not exert force on the second pressing plate 296. The second pressing plate 296 will no longer trigger the second detection switch 295. At this time, it can be known that the packing belt is broken, and the operator can be timely informed to operate.

[0183] If the packing belt is not broken, the second pressing plate 296 will continue to rotate to make the second pressing plate 296 separate from the packing belt and the goods during the reverse movement of the bundling machine head to reset. In order to facilitate the second pressing plate 296 to separate from the packing belt and the goods, the free end of the second pressing plate 296 is provided with a second flange 298, which blocks the outside of the auxiliary belt groove 28, so that the packing belt is pressed on the second flange 298 to drive the second pressing plate 296 to rotate after separating from the auxiliary belt groove 28.

[0184] In addition, the second air nozzle 216 can also be arranged between the front panel 211 and the back panel 212.

[0185] Specifically, in use, after the second air nozzle 216 is ventilated, the space between the front panel 211 and the back panel 212 can be blown, and the debris can be blown out in time by the blowing of the second air nozzle 216. In this way, on the one hand, the frequency of the operator cleaning the internal debris can be reduced, and on the other hand, the abrasion of the belt feeding wheel caused by the debris can be reduced, and the frequency of maintenance and replacement can be reduced.

Claims

1. A method for bundling and packaging goods, characterized in that, include: In the strapping process, the strapping machine conveys the strapping tape so that it wraps around the outer surface of the goods to be strapped. The tensioning process involves tightening the strapping until the tension on the strapping reaches the preset tension value. In the stretching process, tension is continued to be applied to the strapping so that the stretching elongation of the strapping reaches the preset elongation value △L; The cutting and welding process involves cutting the packing straps and welding the overlapping ends of the packing straps together.

2. The method for bundling and packaging goods according to claim 1, characterized in that, The preset tension value is the continuous tension force generated by the packing strap after the goods are packaged, ensuring that the goods are effectively secured.

3. The method for bundling and packaging goods according to claim 1, characterized in that, The preset elongation value △L includes at least the allowance generated by the strapping being pulled in the machine head and the amount of shrinkage caused by the compression of the goods.

4. The method for bundling and packaging goods according to claim 1, characterized in that, The tensioning process specifically involves the ratio of the increase in tension on the strapping to the elongation of the strapping during the tensioning process being k1. The stretching process specifically involves the ratio of the increase in tension on the strapping to the amount of stretching elongation of the strapping being k2. Where k1 > k2.

5. The method for bundling and packaging goods according to any one of claims 1-4, characterized in that, After the strapping is detached from the strapping machine, it adheres tightly to the outer surface of the goods and exerts a continuous tension on them.

6. A strapping machine for implementing the cargo strapping and packaging method as described in any one of claims 1-5, characterized in that, It includes a packaging chute and a machine head; the machine head is configured to cooperate with the packaging chute to form a conveying channel for conveying packing straps, and is also used for conveying and welding packing straps; The machine head is equipped with a tensioning mechanism, which is configured to tension the packing straps surrounding the goods so that the tension on the packing straps reaches a preset tension value. The machine head is also equipped with an elongation mechanism, which is configured to elongate the packing strap when it reaches a preset tensile value.

7. The strapping machine for the cargo strapping and packaging method according to claim 6, characterized in that, The machine head also includes: The installation module includes a mounting base; A belt feeding module, wherein a belt feeding channel is formed and configured to convey packing belts; A welding module configured to cut and weld packing straps; The welding module and the tape feeding module are mounted on the mounting base and are movable relative to each other. The tensioning mechanism is configured to drive the welding module and the feeding module away from each other so that the tension on the packing strap reaches a preset tension value; and / or, the elongation mechanism is configured to drive the welding module and the feeding module away from each other to elongate the packing strap that has reached the preset tension value.

8. The strapping machine for the cargo strapping and packaging method according to claim 7, characterized in that, The machine head also includes: a housing, a second feed roller, a welding module, and a second motor. The second feed roller is rotatably disposed in the housing. The welding module and the second motor are disposed on the housing. The housing forms the feed channel on the outer periphery of the second feed roller. The second motor is configured to rotate in the forward direction to drive the feed roller to rotate and feed the belt, and the second motor is also configured to rotate in the reverse direction to drive the feed roller to be tightened and then stretched; wherein the second motor and the second feed roller constitute the tightening mechanism and the stretching mechanism integrated into the same module.

9. A strapping machine for the cargo strapping and packaging method according to claim 7 or 8, characterized in that, The welding module includes a welding housing, a spindle, a clamping mechanism, a welding mechanism, and a drive component. The welding housing includes a shell and a maintenance cover. A mounting groove is provided on one surface of the shell, forming a maintenance opening on the surface of the shell. The maintenance cover is disposed on the shell and configured to cover the maintenance opening. The maintenance cover includes a first maintenance plate, the upper end of which is rotatably disposed on the shell. The spindle is arranged laterally and rotatably disposed on the shell, and a first cam and a second cam are provided on the spindle. The welding mechanism includes a moving welding block and a stationary welding block arranged opposite to each other. The clamping mechanism includes a sliding clamping block and a fixed clamping block arranged opposite to each other. The clamping mechanism and the welding mechanism are disposed on the welding housing. The first cam, the second cam, the sliding clamping block, and the moving welding block are all disposed in the mounting groove and located within the maintenance area formed by the maintenance opening. The first maintenance plate is configured to cover at least the outside of the sliding clamping block and the moving welding block when closed. The drive component is configured to drive the spindle to rotate, the first cam is configured to drive the moving welding block closer to the stationary welding block, and the second cam is configured to drive the sliding clamping block closer to the fixed clamping block.

10. The strapping machine for the cargo strapping and packaging method according to claim 9, characterized in that, The top of the welding machine housing is provided with a guide belt channel, which is configured to guide the packing strap into the feeding module; The clamping mechanism further includes an upper clamping mechanism located above the main shaft. The upper clamping mechanism includes the fixed clamping block and the sliding clamping block arranged opposite each other. The upper clamping mechanism is configured to clamp the packing strap passing through the guide channel. The inspection cover also includes a second inspection plate, which is detachably disposed on the housing and located above the first inspection plate. The second inspection plate is configured to cover the exterior of the sliding clamping block of the upper clamping mechanism.

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