Spiral unstacking device on boxing production line and unstacking method

Abstract

The invention discloses a spiral unstacking device on a boxing production line and a spiral unstacking method.The device comprises spiral unstacking mechanisms symmetrically arranged on the two sides of a conveyor, each spiral unstacking mechanism comprises a mounting frame, a spiral wheel, a transmission assembly and a driving assembly, and the spiral wheels, the transmission assemblies and the driving assemblies are arranged on the mounting frames; the driving assembly drives the spiral wheel to rotate through the transmission assembly. The spiral wheel comprises a shaft body and a wheel body located outside the shaft body, the shaft body is connected with the transmission assembly, a spiral groove extending in the axial direction is formed in the side face of the wheel body, and the two ends of the spiral groove are opened in the two end faces of the wheel body respectively; the screw pitch of the spiral groove is greater than the height of the packaging box; and the minimum distance between the wheel bodies of the two spiral wheels is smaller than the total width of the unfolded lug parts of the packaging box. High-speed stable unstacking of packaging box stacks can be completed through the spiral unstacking device, the spiral unstacking device is simple in structure, high in speed, high in stability and low in equipment failure rate, the production efficiency is improved, and meanwhile the automation level of equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging equipment, and in particular relates to a spiral depalletizing device and a depalletizing method on a cartoning production line. Background Art

[0002] In the packaging industry, on a cartoning production line, multiple boxes are stacked up and down into stacks for transportation. When boxing is required, the stacks of boxes need to be destackered and the boxes need to be transported one by one to complete the boxing.

[0003] Since this type of packaging box has ears that flare outward on the top, based on this structural feature, the depalletizing device commonly used in the industry currently generally adopts a double-stroke lifting mechanism 300, such as a double-stroke cylinder, disposed at the bottom of the conveyor 100, and a group of retractable blocking mechanisms 400 are disposed on each side of the conveyor 100. The double-stroke lifting mechanism 300 is used to lift the stack of packaging boxes 200, and the blocking mechanism 400 is used to support the ears of a certain layer of packaging boxes after being extended. During depalletizing, the stack of packaging boxes rises or falls with the support of the double-stroke lifting mechanism 300, and cooperates with the extension and retraction of the blocking mechanism 400 to realize the disassembly and transportation of the stack of packaging boxes 200 from bottom to top. The structure of this depalletizing device is as follows: Figure 1 shown.

[0004] Figure 1 The destacking process of the destacking device shown is as follows Figure 2 As shown, it includes the following steps:

[0005] The first step, such as Figure 2 (a) The cylinders of the double-stroke lifting mechanism and the blocking mechanism are all retracted, the conveyor stops, and the packaging box stack falls on the conveyor.

[0006] The second step is, Figure 2 (b) The first stroke cylinder in the double stroke lifting mechanism extends to lift the top of the packaging box stack to the depalletizing position.

[0007] The third step is Figure 2 (c) The cylinders of the blocking mechanisms on the left and right sides of the conveyor extend out, and the ends of the blocking mechanisms are supported under the ears of the packaging boxes at the second bottom layer, so that the packaging boxes above the second bottom layer are blocked by the blocking mechanisms.

[0008] The fourth step is Figure 2 (d) The first stroke cylinder in the double stroke lifting mechanism is retracted, the bottom layer of the packaging box is placed on the conveyor, and the conveyor is started to transport the packaging box to the next station.

[0009] Step 5: Figure 2 (e) The first stroke cylinder and the second stroke cylinder in the double stroke lifting mechanism are fully extended and pressed against the bottom of the packaging box stack.

[0010] Step 6: Figure 2 (f) The cylinders of the blocking mechanisms on the left and right sides of the conveyor are retracted.

[0011] Step 7: Figure 2 (g) The second stroke cylinder in the double stroke lifting mechanism retracts, lowering the stack of packaging boxes to the depalletizing position.

[0012] Step 8: Figure 2 (h) The cylinders of the blocking mechanisms on the left and right sides of the conveyor are extended, and the ends of the blocking mechanisms are supported under the ears of the packaging boxes on the second bottom layer. The packaging boxes on the upper side of the second bottom layer are blocked by the blocking mechanisms.

[0013] Step 9: Figure 2 (i) The first stroke cylinder in the double stroke lifting mechanism is retracted, the bottom layer of the packaging box is placed on the conveyor, and the conveyor is started to transport the packaging box to the next station.

[0014] Repeat steps 5 to 9 until all the boxes are depalletized.

[0015] The above-mentioned depalletizing device has a complex structure, and the depalletizing process requires the cooperation of a double-stroke lifting mechanism and a blocking mechanism. The production cycle is long, the speed is slow, the equipment failure rate is high, energy is wasted, productivity cannot be improved, and the automation level is low. Summary of the invention

[0016] The present invention provides a spiral depalletizing device and a depalletizing method on a box packaging production line, which utilize the spiral depalletizing mechanisms on both sides of a conveyor to complete high-speed and stable depalletizing of packaging box stacks. The device has a simple structure, high speed, strong stability, and low equipment failure rate, thereby improving production efficiency and also improving the automation level of the equipment.

[0017] In order to solve the above technical problems, the present invention provides the following technical solutions: a spiral depalletizing device on a cartoning production line, comprising a spiral depalletizing mechanism symmetrically arranged on both sides of a conveyor, the spiral depalletizing mechanism comprising a mounting frame and a spiral wheel, a transmission assembly and a driving assembly arranged on the mounting frame, the driving assembly driving the spiral wheel to rotate through the transmission assembly;

[0018] The spiral wheel comprises an axle body and a wheel body outside the axle body, the axle body is connected to the transmission assembly, a spiral groove extending in the axial direction is arranged on the side of the wheel body, and two ends of the spiral groove are respectively opened at the two end surfaces of the wheel body; the pitch of the spiral groove is greater than the height of the packaging box;

[0019] The minimum distance between the wheel bodies of the two spiral wheels is smaller than the total width of the ears of the packaging box after they are unfolded.

[0020] Furthermore, the minimum distance between the wheel bodies of the two spiral wheels is greater than the width of the box body excluding the ears of the packaging box.

[0021] As an option, the spiral directions of the spiral grooves on the two spiral wheels in the two spiral destacking mechanisms are the same.

[0022] Furthermore, the two driving assemblies in the two spiral destacking mechanisms have the same rotation direction.

[0023] As yet another option, the spiral directions of the spiral grooves on the two spiral wheels in the two spiral destacking mechanisms are opposite.

[0024] Furthermore, the two driving assemblies in the two spiral destacking mechanisms have opposite rotation directions.

[0025] The driving assembly includes a servo motor and a reducer.

[0026] The transmission assembly is a synchronous belt mechanism, including an active synchronous wheel, a driven synchronous wheel and a synchronous belt, the active synchronous wheel is connected to the output end of the driving assembly, and the driven synchronous wheel is connected to the spiral wheel.

[0027] The transmission assembly is a chain mechanism or a gear mechanism.

[0028] The present invention further proposes a spiral depalletizing method based on the above-mentioned device. The method utilizes the spiral depalletizing device described in any one of the above items and includes the following steps: first, the stack of packaging boxes to be disassembled is placed between two spiral depalletizing mechanisms, and the packaging boxes on the bottom layer are supported on the starting end of the spiral groove on the upper end faces of the two spiral wheel bodies through ears; then the driving component is started to drive the two spiral wheels to rotate. As the spiral wheels rotate, the packaging boxes in the stack of packaging boxes move downward along the spiral groove, and the packaging boxes on the bottom layer leave from the end of the spiral groove, fall onto the conveyor, and are transported to the next workstation; as the spiral wheels rotate, packaging boxes continuously enter the spiral groove from the upper end face of the spiral wheel body until all the packaging boxes on the stack of packaging boxes are disassembled.

[0029] The beneficial effects achieved by the present invention are: the present invention adopts a servo motor to control the spiral depalletizing mechanism to achieve high-speed and stable depalletizing of the packaging box, which has a simple structure, high speed, strong stability, low equipment failure rate, and improves production efficiency while also improving the automation level of the equipment. The device can be applied not only to the design and manufacture of new equipment, but also to the transformation of old production lines, greatly shortening the depalletizing time, greatly improving productivity, and at the same time greatly improving the automation level of the equipment, reducing equipment failure rate, and improving enterprise benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1It is a structural schematic diagram of a destacking device in the prior art;

[0032] Figure 2 It is a schematic diagram of the depalletizing process in the prior art;

[0033] Figure 3 It is a schematic structural diagram of the spiral destacking device of the present invention;

[0034] Figure 4 is a front view of the spiral destacking device of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the spiral destacking mechanism of the present invention;

[0036] In the figure: 100, conveyor, 200, packaging box stack, 201, ear, 300, double-stroke lifting mechanism, 400, blocking mechanism;

[0037] 500. spiral destacking mechanism; 501. spiral wheel; 501-1. shaft body; 501-2. wheel body; 501-3. spiral groove; 502. mounting frame; 503. driven synchronous wheel; 504. synchronous belt; 505. active synchronous wheel; 506. reducer; 507. servo motor. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] Example 1

[0040] like Figure 3-4 As shown, a spiral depalletizing device on a cartoning production line includes spiral depalletizing mechanisms 500 arranged on both sides of a conveyor 100 . The two spiral depalletizing mechanisms 500 are symmetrically arranged about the conveying center line of the conveyor 100 and are higher than the conveying surface of the conveyor 100 .

[0041] like Figure 5 As shown, the spiral destacking mechanism 500 includes a spiral wheel 501, a mounting frame 502, a transmission assembly and a drive assembly.

[0042] The mounting frame 502 is used to be fixedly connected to the frame on the side of the conveyor 100, the transmission assembly is arranged above the mounting frame 502, and the spiral wheel 501 and the driving assembly are both arranged below the mounting frame 502. The input end of the transmission assembly is connected to the driving assembly, and the output end of the transmission assembly is connected to the spiral wheel 501. The driving assembly drives the spiral wheel 501 to rotate through the transmission assembly.

[0043] Specifically, in this embodiment, the transmission assembly adopts a synchronous belt mechanism, including an active synchronous wheel 505 , a driven synchronous wheel 503 and a synchronous belt 504 .

[0044] In other embodiments, a chain mechanism or a gear mechanism may be used to achieve power transmission.

[0045] The driving assembly includes a speed reducer 506 and a servo motor 507 . The output shaft of the speed reducer 506 is connected to the active synchronous wheel 505 . The power of the servo motor 507 is decelerated by the speed reducer 506 to drive the active synchronous wheel 505 to rotate.

[0046] The spiral wheel 501 includes an axle body 501-1 and a wheel body 501-2, wherein the wheel body 501-2 is located outside the axle body 501-1, and the length of the wheel body 501-2 is less than the length of the axle body 501-1. The upper end of the axle body 501-1 is connected to the driven synchronous wheel 503. A spiral groove 501-3 is provided on the surface of the wheel body 501-2, wherein the starting end of the spiral groove 501-3 is connected to the upper end face of the wheel body 501-2, and the end of the spiral groove 501-3 is connected to the lower end face of the wheel body 501-2. The pitch D of the spiral groove 501-3 is greater than the height of the packaging box, so that two adjacent packaging boxes can be separated from each other after entering the spiral groove 501-3. Preferably, the pitch D of the spiral groove 501-3 is equal to twice the stacking distance d of the packaging boxes. In this embodiment, the spiral wheels 501 on the two spiral destacking mechanisms 500 have spiral grooves 501 - 3 with the same rotation direction. When destacking is performed, the two spiral wheels 501 have the same rotation direction.

[0047] After the two spiral destacking mechanisms 500 are installed, the minimum distance between the wheel bodies 501-2 of the two spiral wheels 501 is smaller than the total width of the ear portions 201 of the packaging box after they are unfolded, and the total width refers to the distance between the edges of the two ear portions in the width direction of the packaging box. In this way, the packaging box stack 200 can be supported on the upper end surfaces of the wheel bodies 501-2 of the two spiral wheels 501 through the ear portions 201.

[0048] Preferably, the minimum distance between the wheel bodies 501 - 2 of the two spiral wheels 501 is also greater than the width of the box body excluding the ear portion 201 , so that the spiral wheels 501 will not touch the box body of the box during the rotating destacking process.

[0049] In other embodiments, the spiral grooves 501 - 3 on the two spiral wheels 501 have opposite rotation directions, and the rotation directions of the two servo motors 507 are also opposite, which can also achieve high-speed and stable destacking of the packaging box stack 200 through the rotation of the spiral wheels 501 .

[0050] Example 2

[0051] Combine the following Figure 4The destacking method of the present invention will be described.

[0052] The destacking method comprises the following steps: first, manually placing the packaging box stack 200 to be destacking between two spiral destacking mechanisms 500, and the packaging boxes at the bottom layer are supported on the upper end surfaces of the wheel bodies 501-2 of the two spiral wheels 501 through the ears 201. Preferably, the ears 201 of the packaging boxes are placed at the starting end position of the spiral groove 501-3; then, the two servo motors 507 and the reducer 506 are started to drive the two spiral wheels 501 to rotate. As the spiral wheels 501 rotate, the packaging boxes in the packaging box stack 200 move downward along the spiral groove 501-3, and the packaging boxes at the bottom layer leave from the end of the spiral groove 501-3, fall onto the conveyor 100, and are conveyed to the next workstation. During this process, packaging boxes continuously enter the spiral groove 501-3 from the upper end surfaces of the wheel bodies 501-2 of the spiral wheels 501 until all the packaging boxes on the packaging box stack 200 are destacking.

[0053] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The terms used in the description of this application are only for describing specific implementations and are not intended to limit the exemplary implementations according to this application.

Claims

1. A spiral depalletizing device on a cartoning production line, characterized in that: It includes a spiral destacking mechanism symmetrically arranged on both sides of the conveyor, the spiral destacking mechanism includes a mounting frame, a spiral wheel, a transmission assembly and a driving assembly arranged on the mounting frame, and the driving assembly drives the spiral wheel to rotate through the transmission assembly; The spiral wheel comprises an axle body and a wheel body outside the axle body, the axle body is connected to the transmission assembly, a spiral groove extending in the axial direction is arranged on the side of the wheel body, and two ends of the spiral groove are respectively opened at the two end surfaces of the wheel body; the pitch of the spiral groove is greater than the height of the packaging box; The minimum distance between the wheel bodies of the two spiral wheels is smaller than the total width of the ears of the packaging box after they are unfolded.

2. The spiral destacking device according to claim 1, characterized in that: The minimum distance between the wheel bodies of the two spiral wheels is greater than the box body width excluding the ears of the packaging box.

3. The spiral destacking device according to claim 1, characterized in that: The spiral directions of the spiral grooves on the two spiral wheels in the two spiral destacking mechanisms are the same.

4. The spiral destacking device according to claim 3, characterized in that: The two drive assemblies in the two spiral depalletizing mechanisms have the same rotation direction.

5. The spiral destacking device according to claim 1, characterized in that: The spiral directions of the spiral grooves on the two spiral wheels in the two spiral destacking mechanisms are opposite.

6. The spiral destacking device according to claim 5, characterized in that: The two drive assemblies in the two spiral depalletizing mechanisms have opposite rotation directions.

7. The spiral destacking device according to claim 1, characterized in that: The driving assembly includes a servo motor and a reducer.

8. The spiral destacking device according to claim 1, characterized in that: The transmission assembly is a synchronous belt mechanism, including an active synchronous wheel, a driven synchronous wheel and a synchronous belt, the active synchronous wheel is connected to the output end of the driving assembly, and the driven synchronous wheel is connected to the spiral wheel.

9. The spiral destacking device according to claim 1, characterized in that: The transmission assembly is a chain mechanism or a gear mechanism.

10. A spiral depalletizing method, characterized in that: The method utilizes the spiral depalletizing device as described in any one of claims 1 to 9, and comprises the following steps: first, placing a stack of packaging boxes to be disassembled between two spiral depalletizing mechanisms, with the packaging boxes on the bottom layer supported by ears on the starting end of the spiral groove on the upper end faces of the two spiral wheel bodies; then starting the driving assembly to drive the two spiral wheels to rotate, with the rotation of the spiral wheels, the packaging boxes in the stack of packaging boxes move downward along the spiral groove, and the packaging boxes on the bottom layer leave from the end of the spiral groove, fall onto the conveyor, and are transported to the next workstation; with the rotation of the spiral wheel, packaging boxes continue to enter the spiral groove from the upper end face of the spiral wheel body until all the packaging boxes on the stack of packaging boxes are disassembled.

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