Strapping device for packaging goods

Abstract

The invention discloses a strapping device for packaging goods, relating to the field of strapping devices. The strapping device for packaging goods includes a protective shell. The protective shell includes a first fixed plate and a second fixed plate. A lower drag chain and an upper drag chain are movably mounted inside the protective shell. A first motor is mounted inside the first fixed plate. In the invention, when the first motor drives the first chain wheel to rotate, the lower drag chain is driven to extend, and when the second motor drives a second chain wheel to rotate, the upper drag chain is driven to extend. Two encoders arranged respectively record numbers of turns of the first chain wheel and the second chain wheel at outputs of the first motor and the second motor.

Description

RELATED APPLICATIONS

[0001] The present patent document claims the benefit of priority to Patent Application No. 202520351959.3, filed Mar. 3, 2025, and entitled “STRAPPING DEVICE FOR PACKAGING GOODS,” the entire contents of each of which are incorporated herein by reference.BACKGROUND1. Technical Field

[0002] The invention relates to the field of strapping devices, and in particular to a strapping device for packaging goods.2. Background Information

[0003] Goods strapping machines, also known as strapping devices, are used in transportation, movement, shipment or storage of goods. The strapping devices can assist in strapping and fixing goods. They are safe, reliable, and easy to operate, and improve goods strapping efficiency.

[0004] Large goods usually need to be fixed by straps to prevent the goods on the pallet from collapsing during movement or transportation. However, at present, most of the strapping is still operated manually, which not only increases the workload of operators, but also leads to low strapping efficiency. Therefore, it is necessary to use the strapping devices, commonly known as strapping machines.

[0005] The existing strapping devices are not accurate enough in the control of the length of extension of the drag chain. Typically, an operator visually estimates the length of the drag chain and then straps the goods. In this case, the drag chain may be too long, which leads to an excessive length of extension of the strap, or the drag chain may be too short. If the drag chain is too long, the drag chain needs to be adjusted by the operator, which is laborious. If the drag chain is too short, the strapping device needs to be started again by the operator, which is a waste of time.BRIEF SUMMARY

[0006] Based on this, an objective of the invention is to provide a strapping device for packaging goods to solve the technical problems mentioned in the background.

[0007] In order to achieve the above objective, the invention provides the following technical solutions: A strapping device for packaging goods includes a protective shell. The protective shell includes a first fixed plate and a second fixed plate, and a lower drag chain and an upper drag chain are movably mounted inside the protective shell. A first chain wheel is mounted inside the first fixed plate. A second chain wheel is mounted at one side of the first chain wheel inside the first fixed plate. One side of each of the first chain wheel and the second chain wheel is provided with a driving component. Two encoders are fixed inside the second fixed plate. The two encoders are respectively connected to spindles of the first chain wheel and the second chain wheel. An end portion of the upper drag chain is provided with a strap guide. An outer wall of the upper drag chain is sleeved with a deflection component. The deflection component includes a sliding plate sleeved on the outer wall of the upper drag chain. A bottom of the sliding plate is provided with a sliding groove. The sliding groove provided allows the sliding plate to slide on top of the lower drag chain. An end portion of the sliding plate is movably provided with a movable plate. An end portion of the lower drag chain is provided with a positioning plate. A top of the positioning plate is fixedly provided with a limit column. An end portion of the limit column is provided with a clamping groove.

[0008] With the above technical solutions, when a first motor drives the first chain wheel to rotate, the lower drag chain is driven to extend, and when a second motor drives the second chain wheel to rotate, the upper drag chain is driven to extend. The two encoders arranged respectively record numbers of turns of the first chain wheel and the second chain wheel at outputs of the first motor and the second motor. The encoders feed back signals to a control module, and the control module controls the upper drag chain and the lower drag chain to extend and sets lengths of extension. The end of the lower drag chain is provided with the positioning plate. The positioning plate is provided with the limit column, and the end portion of the limit column is provided with the clamping groove. The limit column can limit the deflection component, so that the deflection component can reach a deflection point of the upper drag chain.

[0009] Further, one side of the strap guide is fixedly provided with a triangular block, and one side of an outer wall of the strap guide is provided with a clamping position.

[0010] With the above technical solutions, the triangular block can limit the strap guide, thereby preventing the strap guide from completely entering the inside of the guide sleeve when returning to its original position. Under the action of the triangular block, the end portion of the strap guide can be located outside the guide sleeve. The clamping position provided can cooperate with the contact rod, and when the strap guide pushes the contact rod, the direction of extension of the upper drag chain can be changed.

[0011] Further, both ends of the guide rod are provided with pulleys.

[0012] With the above technical solutions, the pulleys provided can reduce the friction between the guide rod, and the triangular block and the fixed plate. When the triangular block comes into contact with the pulley at one end of the guide rod, the pulley at the other end of the guide rod is separated from the top end of the fixed plate and slides along the outer wall of the fixed plate, thereby making the deflection component return to its original position.

[0013] Further, one side of the outer wall of the guide sleeve is provided with a through hole, and an outer wall of the contact rod is sleeved with a spring.

[0014] With the above technical solutions, the contact rod can move inside the through hole provided, and the spring provided can exert a pressure on the guide rod such that one end of the guide rod is pressed against the fixed plate, thereby preventing the guide rod from being separated from the outer wall of the fixed plate.

[0015] Further, one side of the first fixed plate is provided with a control module, and one side of the first fixed plate is provided with a strap insertion hole.

[0016] With the above technical solutions, the control module can conveniently control the first motor and the second motor to be on or off, and through the strap insertion hole provided, the strap can conveniently enter between the upper drag chain and the lower drag chain inside the protective shell.

[0017] Based on the above, the invention mainly has the following beneficial effects:

[0018] In the invention, through the first motor, the second motor, the encoders, the positioning plate and the limit column, when the first motor drives the first chain wheel to rotate, the lower drag chain is driven to extend, and when the second motor drives the second chain wheel to rotate, the upper drag chain is driven to extend. The two encoders arranged respectively record the numbers of turns of the first chain wheel and the second chain wheel at the outputs of the first motor and the second motor. The encoders feed back signals to the control module, and the control module controls the upper drag chain and the lower drag chain to extend and sets the lengths of extension. The end of the lower drag chain is provided with the positioning plate. The positioning plate is provided with the limit column, and the end portion of the limit column is provided with the clamping groove. The limit column can limit the deflection component, so that the deflection component can reach the deflection point of the upper drag chain.BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic structural view of the invention;

[0020] FIG. 2 is a front view of the invention;

[0021] FIG. 3 is a schematic view showing the connection of encoders of the invention;

[0022] FIG. 4 is a schematic view showing the operation of a deflection component of the invention;

[0023] FIG. 5 is a schematic view showing the connection of a guide sleeve and a connecting block of the invention; and

[0024] FIG. 6 is a schematic structural view of a bottom of a sliding plate of the invention.

[0025] In the figures: 1, protective shell; 11, first fixed plate; 12, second fixed plate; 13, control module; 14, strap insertion hole; 2, first motor; 21, first chain wheel; 3, second motor; 31, second chain wheel; 4, lower drag chain; 5, upper drag chain; 6, deflection component; 61, sliding plate; 62, guide sleeve; 63, connecting block; 64, guide rod; 65, pulley; 66, contact rod; 67, spring; 68, fixed plate; 69, through hole; 610, sliding groove; 611, movable plate; 612, connecting rod; 7, positioning plate; 71, limit column; 72, clamping groove; 8, strap guide; 81, triangular block; 82, clamping position; 9, encoder.DETAILED DESCRIPTION OF THE DRAWINGS AND THE PRESENTLY PREFERRED EMBODIMENTS

[0026] The technical solutions in the embodiments of the invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the invention. The embodiments described below with reference to the accompanying drawings are exemplary and used only for explaining the invention, and should not be construed as a limitation of the invention.

[0027] The embodiments of the invention will be described below according to the overall structure of the invention.

[0028] A strapping device for packaging goods, as shown in FIG. 1 to FIG. 6, includes a protective shell 1. The protective shell 1 includes a first fixed plate 11 and a second fixed plate 12, and a lower drag chain 4 and an upper drag chain 5 are movably mounted inside the protective shell 1. A first chain wheel 21 is mounted inside the first fixed plate 11. A second chain wheel 31 is mounted at one side of the first chain wheel 21 inside the first fixed plate 11. One side of each of the first chain wheel 21 and the second chain wheel 31 is provided with a driving component. The driving components are a first motor 2 and a second motor 3. An output of the first motor 2 is connected to the first chain wheel 21. An output of the second motor 3 is connected to the second chain wheel 31. Two encoders 9 are fixed inside the second fixed plate 12. The two encoders 9 are respectively connected to spindles of the first chain wheel 21 and the second chain wheel 31. An end portion of the upper drag chain 5 is provided with a strap guide 8. An outer wall of the upper drag chain 5 is sleeved with a deflection component 6. The deflection component 6 includes a sliding plate 61 sleeved on the outer wall of the upper drag chain 5. A bottom of the sliding plate 61 is provided with a sliding groove 610. When the upper drag chain 5 slides, the sliding plate 61 slides on top of the lower drag chain 4. The sliding groove 610 provided allows the sliding plate 61 to slide on top of the lower drag chain 4, which can prevent the sliding plate 61 from being separated from the lower drag chain 4. An end portion of the sliding plate 61 is movably provided with a movable plate 611. An end portion of the lower drag chain 4 is provided with a positioning plate 7. A top of the positioning plate 7 is fixedly provided with a limit column 71. An end portion of the limit column 71 is provided with a clamping groove 72. A top of the sliding plate 61 is movably provided with a connecting block 63. The top of the sliding plate 61 is movably provided with a guide sleeve 62. An outer wall of the guide sleeve 62 is movably connected to an end portion of the connecting block 63. One side of the guide sleeve 62 is movably provided with a guide rod 64. One side of the guide rod 64 is fixedly provided with a contact rod 66. One side of the top of the sliding plate 61 is fixedly provided with a fixed plate 68, and the other side of the top of the sliding plate 61 is movably provided with a connecting rod 612.

[0029] Referring to FIG. 4 and FIG. 6, one side of the strap guide 8 is fixedly provided with a triangular block 81, and one side of an outer wall of the strap guide 8 is provided with a clamping position 82. The triangular block 81 can limit the strap guide 8, thereby preventing the strap guide 8 from completely entering the inside of

[0030] the guide sleeve 62 when returning to its original position. Under the action of the triangular block 81, the end portion of the strap guide 8 can be located outside the guide sleeve 62. The clamping position 82 provided can cooperate with the contact rod, and when the strap guide 8 pushes the contact rod 66 through the clamping position 82, the direction of extension of the upper drag chain 5 can be changed.

[0031] Referring to FIG. 5 and FIG. 6, both ends of the guide rod 64 are provided with pulleys 65. The pulleys 65 provided can reduce the friction between the guide rod 64, and the triangular block 81 and the fixed plate 68. When the triangular block 81 comes into contact with the pulley at one end of the guide rod 64, the pulley at the other end of the guide rod 64 is separated from the top end of the fixed plate 68 and slides along the outer wall of the fixed plate 68, thereby making the deflection component 6 return to its original position.

[0032] Referring to FIG. 5, one side of the outer wall of the guide sleeve 62 is provided with a through hole 69, and an outer wall of the contact rod 66 is sleeved with a spring 67. The contact rod 66 can move inside the through hole 69 provided, and the spring 67 provided can exert a pressure on the guide rod 64 such that the pulley at one end of the guide rod 64 is pressed against the fixed plate 68, thereby preventing the pulley at one end of the guide rod 64 from being separated from the outer wall of the fixed plate 68.

[0033] Referring to FIG. 2, one side of the first fixed plate 11 is provided with a control module 13, and one side of the first fixed plate 11 is provided with a strap insertion hole 14. The control module 13 can conveniently control the first motor 2 and the second motor 3 to be on or off, and through the strap insertion hole 14 provided, the strap can conveniently enter between the upper drag chain and the lower drag chain inside the protective shell 1.

[0034] Referring to FIG. 1 and FIG. 4, one side of the limit column 71 is provided with the clamping groove 72. The clamping groove 72 provided can limit the movable plate 611 and avoid unstable contact between the movable plate and the limit column 71 when the movable plate 611 moves forward, causing the movable plate 611 to be out of the limit of the limit column 71.

[0035] The working principle of the invention is as follows: When in use, the control module 13 controls the first motor 2 and the second motor 3 to be on and off. The first motor 2 and the second motor 3 may be electromagnetic brake motors. When the motors stop working, the upper drag chain 5 and the lower drag chain 4 stop extending. When the first motor 2 is started, the power output of the first motor 2 drives the first chain wheel 21 to work, and the first chain wheel 21 drives the lower drag chain 4 to slide. When the lower drag chain 4 slides, the positioning plate 7 is driven to extend together. The encoders 9 feed back signals to the control module 13, and the control module 13 controls the first motor 2 and the second motor 3 to rotate, thereby controlling the setting of the lengths of extension of the lower drag chain 4 and the upper drag chain 5. After the lower drag chain 4 extends to the set length, the first motor 2 stops outputting power. When the lower drag chain 4 slides and the second motor 3 is started subsequently, the power output of the second motor 3 drives the second chain wheel 31 to work, and the second chain wheel 31 drives the upper drag chain 5 to extend. When the upper drag chain 5 drives the strap guide 8 to move, the strap guide 8 drives the deflection component 6 to slide on the outer wall of the lower drag chain 4. When the movable plate 611 comes into contact with the positioning plate 7, the limit column 71 limits the movable plate 611, thereby preventing the deflection component 6 from continuing moving forward.

[0036] In this case, the movable plate 611 is limited by the limit column 71, but the upper drag chain 5 continues driving the strap guide 8 to move forward. The strap guide 8 pushes the contact rod 66 through the clamping position 82 to rotate the guide rod 64, so that the guide sleeve 62 is turned over by 90 degrees. At this time, the contact rod 66 slides out of the clamping position 82 such that the contact rod 66 is separated from the strap guide 8. The strap guide 8 continues moving forward, such that the strap fixed on the strap guide is extended out together. Then, the second motor 3 drives the second chain wheel 31 to rotate reversely, so that the upper drag chain 5 returns to its original position. When the upper drag chain 5 returns to its original position, the strap guide 8 is driven to move reversely. When the triangular block 81 at one side of the strap guide 8 comes into contact with the pulley 65 at the end portion of the guide rod 64, the guide rod 64 is rotated. The rotation of the guide rod 64 drives the contact rod 66 into the clamping position 82, and the strap guide 8 drives the guide sleeve 62 to return to its original position. The upper drag chain 5 drives the sliding plate 61 to slide on the outer wall of the lower drag chain 4. Then, the first motor 2 drives the lower drag chain 4 to move reversely so as to return to its original position.

[0037] Although the embodiments of the invention have been shown and described, the specific embodiments are only an explanation of the invention, and not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in an appropriate manner. After reading this specification, those skilled in the art can make modifications, substitutions and variations to the embodiments without departing from the principle and purpose of the invention as needed, but all are protected by the patent law as long as they are within the scope of the claims of the invention.

Claims

1. A strapping device for packaging goods, comprising a protective shell, including a first fixed plate and a second fixed plate; a lower drag chain and an upper drag chain are movably mounted inside the protective shell; and a first chain wheel is mounted on the first fixed plate, a second chain wheel mounted adjacent to the first chain wheel on the first fixed plate, wherein a drive component is respectively arranged on an axial side of each of the first chain wheel and the second chain wheel, two encoders are fixedly mounted to the second fixed plate, the two encoders are respectively connected to spindles of the first chain wheel and the second chain wheel, an end portion of the upper drag chain is provided with a strap guide, wherein a deflection component is sleeved on an outer surface of the upper drag chain, and the deflection component includes a sliding plate surrounding the outer surface of the upper drag chain, a bottom of the sliding plate is provided with a sliding groove, the sliding groove configured to guide sliding movement of the sliding plate, an end portion of the sliding plate is movably provided with a movable plate, an end portion of the lower drag chain is provided with a positioning plate, a top of the positioning plate is fixedly provided with a limit column, and an end portion of the limit column is provided with a groove configured to limit movement of the movable plate.

2. The strapping device for packaging goods according to claim 1, wherein a top of the sliding plate is movably provided with a connecting block, the top of the sliding plate is movably provided with a guide sleeve, an outer wall of the guide sleeve is movably connected to an end portion of the connecting block, one side of the guide sleeve is movably provided with a guide rod, one side of the guide rod is fixedly provided with a contact rod, one side of the top of the sliding plate is fixedly provided with a fixed plate, and the other side of the top of the sliding plate is movably provided with a connecting rod.

3. The strapping device for packaging goods according to claim 1, wherein one side of the strap guide is fixedly provided with a triangular block, and one side of an outer wall of the strap guide is provided with a position configured to change the direction of extension of the upper drag chain.

4. The strapping device for packaging goods according to claim 2, wherein both ends of the guide rod are provided with pulleys.

5. The strapping device for packaging goods according to claim 2, wherein one side of the outer wall of the guide sleeve is provided with a through hole, and an outer wall of the contact rod is sleeved with a spring.

6. The strapping device for packaging goods according to claim 1, wherein one side of the first fixed plate is provided with a control module, and one side of the first fixed plate is provided with a strap insertion hole.

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