An alternating cold stretching packaging device

Abstract

The present invention provides an alternating cold-stretching packaging device, comprising: a bracket having a plurality of support columns; a film pulling device connected to the bracket, which has two independently and oppositely arranged film pulling mechanisms for cold-stretching a packaging film. The film pulling mechanisms are connected to the support columns, and the two film pulling mechanisms can perform alternating reciprocating motions on the support columns to alternately pull and package an article passing through the packaging position by the two film pulling mechanisms. The present invention reduces the packaging cost by about 30%, facilitates the inspection of goods, and is more environmentally friendly. At the same time, the alternating cold-stretching packaging method greatly improves the packaging efficiency, can greatly save the cost of purchasing the machine, and solves the problem of insufficient installation space of the equipment in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging machinery, and particularly relates to an alternating cold-drawing packaging device. Background Art

[0002] With the continuous improvement of the social consumption level and the continuous improvement and development of the logistics industry in recent years, the demand for various consumer goods has been increasing day by day. The circulation of any item inevitably requires packaging to protect the item during transportation. At present, the packaging method mainly uses traditional paper packaging. However, with the intensification of industrial competition and the increasingly severe environmental protection situation, how to effectively reduce costs and be more environmentally friendly has become the theme of innovation in the packaging industry.

[0003] As the current mainstream packaging form, transparent film packaging has two types: one is the cold-drawing film technology, and the other is the heat-shrinkable film technology. When using the heat-shrinkable film technology, it is necessary to heat the film material by flame to generate shrinkage to form a wrapping force. However, flame heating has higher requirements for the factory environment and protection from a safety perspective and has limitations. The cold-drawing film only stretches the film material mechanically and then relies on the resilience to generate a wrapping force, with a wider range of adaptability.

[0004] Such an advantageous cold-drawing film packaging technology has not been fully promoted in the domestic home appliance and similar industries. The main reasons are twofold: First, the domestic home appliance industry has a high maturity and a high level of production automation, with high requirements for the rhythm and efficiency of each process. The existing cold-drawing packaging equipment cannot meet such requirements for efficiency and process rhythm. Second, to meet the existing production rhythm through multiple machines, the space of the existing production line is limited, and it will also increase the investment in fixed assets. Summary of the Invention

[0005] In view of the above technical problems, the present invention provides an alternating cold-drawing packaging device, which can reduce the packaging cost by about 30%, facilitate the inspection of goods, and is more environmentally friendly. At the same time, the alternating cold-drawing packaging method greatly improves the packaging efficiency, can greatly save the cost of purchasing machines, and solves the problem of insufficient installation space of the equipment in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is: an alternating cold-drawing packaging device, comprising:

[0007] A bracket having a plurality of support columns;

[0008] A film-drawing device connected to the bracket, having two independently and oppositely arranged film-drawing mechanisms for cold-drawing a packaging film. The film-drawing mechanisms are connected to the support columns, and the two film-drawing mechanisms can reciprocate alternately on the support columns to alternately draw and package an item passing through the packaging position by the two film-drawing mechanisms.

[0009] In some embodiments of the present invention, the packaging device further includes a film feeding device for feeding and cutting the packaging film.

[0010] In some embodiments of the present invention, four support columns are provided, and the support columns are arranged in a rectangle.

[0011] In some embodiments of the present invention, the film pulling mechanism includes a first moving part connected to the support column, a second moving part connected to the first moving part, and a film taking part connected to the second moving part.

[0012] In some embodiments of the present invention, the first moving part includes first moving blocks respectively connected to two adjacent support columns, a first connecting part connecting the two first moving blocks, and the two first moving blocks can move synchronously along the support column.

[0013] In some embodiments of the present invention, the second moving part includes two second moving blocks connected to the first connecting part, and support arms respectively connected to the two second moving blocks, and the two second moving blocks can move relatively or away from each other synchronously along the connecting part.

[0014] In some embodiments of the present invention, two groups of film taking parts are provided, which are respectively connected to the support arms and can move synchronously. Each group of film taking parts is provided with two claws, and the two claws can move relatively or away from each other along the support arm.

[0015] In some embodiments of the present invention, the claw includes a movable moving block connected to the support arm, a baffle vertically connected to the moving block, and a rotatable rolling part connected to the moving block. Rollers are connected to both the baffle and the rolling part. After the packaging film falls between the baffle and the rolling part, the rolling part can rotate towards the baffle to make the rollers abut against each other to fix the packaging film.

[0016] In some embodiments of the present invention, the surface of the baffle facing the rolling part is set as an arc surface.

[0017] In some embodiments of the present invention, the packaging device further includes a controller and a position detection element.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0019] The film pulling device is provided with two film pulling mechanisms, and the two film pulling mechanisms perform alternating reciprocating motions on the support columns to alternately pull and package the articles passing through the packaging position. In the alternating reciprocating working mode, when one film pulling mechanism performs the film pulling and packaging work, the other film pulling mechanism performs the film receiving work. After one film pulling mechanism completes the packaging of an article, the other film pulling mechanism immediately packages the next article. In terms of working efficiency, compared with the 20 seconds required for the traditional stretch film packaging machine to complete one packaging work, this equipment can shorten the time by 8 - 10 seconds, greatly improving the packaging efficiency. Moreover, the setting method of the two film pulling mechanisms can greatly save the cost of purchasing the machine, and at the same time solve the problem of insufficient installation space for equipment in a relatively small space in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Structural schematic of the present invention Figure 1 ;

[0022] Figure 2 Structural schematic of the present invention Figure 2 ;

[0023] Figure 3 Side view of the present invention Figure 1 ;

[0024] Figure 4 Side view of the present invention Figure 2 ;

[0025] Figure 5 Top view of the present invention;

[0026] Figure 6 is Figure 2 Partial enlarged view of part A in

[0027] In the above figures: 0, packaging position; 1, bracket; 11, support column; 111, support column A; 112, support column B; 113, support column C; 114, support column D; 2, film pulling device; 2A, film pulling mechanism; 21, first moving part; 211, first moving block; 212, first connecting part; 22, second moving part; 221, second moving block; 222, support arm; 23, film taking part; 231, machine claw; 2311, moving block; 2312, baffle; 23121, roller; 23122, guiding part; 2313, rolling part; 23131, roller; 23132, rotating arm; 23133, cylinder; 2B, film pulling mechanism; 3, film feeding device. Detailed implementation manners

[0028] Next, the present invention will be specifically described through exemplary implementation manners. However, it should be understood that, without further narration, the elements, structures, and features in one implementation manner can also be beneficially combined into other implementation manners.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] See Figures 1 to 6, An alternating cold-stretching packaging device, which can be applied to a packaging production line. It includes: a bracket 1 and a film pulling device 2. Among them: the bracket 1 has a plurality of support columns 11; the film pulling device 2 is connected to the bracket 1 and has two independently and oppositely arranged film pulling mechanisms 2A and 2B. The structures of the film pulling mechanism 2A and the film pulling mechanism 2B are the same and are used for cold-stretching packaging films. The film pulling mechanisms 2A and 2B are respectively connected to the support columns 11, and the two film pulling mechanisms 2A and 2B can perform alternating reciprocating motions on the support columns 11 to alternately pull and package the articles passing through the packaging position 0. The film pulling device 2 is provided with two film pulling mechanisms 2A and 2B, and the two film pulling mechanisms 2A and 2B perform alternating reciprocating motions on the support columns 11 to alternately pull and package the articles passing through the packaging position 0. The alternating reciprocating working mode enables one film pulling mechanism 2A to perform the film pulling and packaging work while the other film pulling mechanism 2B performs the film receiving work. After one film pulling mechanism 2A finishes packaging an article, the other film pulling mechanism 2B immediately packages the next article passing through the packaging position 0. Currently, the fastest time for a traditional stretch film packaging machine to complete one packaging work is 20 seconds. Compared with the traditional stretch film packaging machine in terms of work efficiency for completing one packaging work, this device can shorten the time by 8 - 10 seconds, greatly improving the packaging efficiency. Moreover, the setting method of the two film pulling mechanisms 2A and 2B can greatly save the cost of purchasing the machine, and at the same time solves the problem of insufficient installation space for equipment in a relatively small space in the prior art.

[0033] Further, in this embodiment, there are four support columns 11, which are arranged vertically. In a top view, the four support columns 11 are arranged in a rectangle. The film pulling mechanism 2A can be connected to the support column A111 and the support column B112, and the film pulling mechanism 2B can be connected to the support column C113 and the support column D114. The bottoms of the support columns 11 can be connected by a reinforcing rod, and the bottoms of the support columns 11 can be connected to a floor anchor for fixing to the ground.

[0034] Further, in this embodiment, since the film pulling mechanism 2A and the film pulling mechanism 2B are the same, taking the film pulling mechanism 2A as an example for further detailed description, the film pulling mechanism 2A includes a first moving part 21 connected to the support column 11, a second moving part 22 connected to the first moving part 21, and a film taking part 23 connected to the second moving part 22.

[0035] The first moving part 21 includes first moving blocks 211 respectively connected to two adjacent support columns 11, and a first connecting part 212 connected to the two first moving blocks 211. The first moving blocks 211 can move on the support columns 11 by means of chain drive connected by sprockets and chains. The chain drive method is a prior art and will not be elaborated here. The first moving blocks 211 can also move on the support columns 11 by setting the support columns 11 and the first moving blocks 211 as linear guide rails, or other ways that can enable the first moving blocks 211 to move along the support columns 11, but the two first moving blocks 211 need to move synchronously along the support columns 11. The first connecting part 212 is horizontally and transversely arranged.

[0036] The second moving part 22 includes two second moving blocks 221 connected to the first connecting part 212, and support arms 222 respectively connected to the two second moving blocks 221. The support arms 222 are horizontally and longitudinally arranged. The second moving blocks 221 can move on the first connecting part 212 by means of lead screws, synchronous belts and motors. The connection method is a prior art and will not be elaborated. Other ways that can enable the second moving blocks 221 to move on the first connecting part 212 can also be adopted. The two second moving blocks can move relatively or away from each other synchronously along the connecting part.

[0037] There are two groups of film taking parts 23, which are respectively connected to the support arms 222 and can move synchronously. Each group of film taking parts 23 is provided with two grippers 231, and the two grippers 231 can move relatively or away from each other along the support arms 222.

[0038] Further, the gripper 231 includes a movable moving block 2311 connected to the support arm 222, a baffle 2312 vertically connected to the moving block 2311, and a rotatable rolling part 2313 connected to the moving block 2311. The movement of the moving block 2311 on the support arm 222 can be achieved by synchronous belts, chain drives, screw drives or other drive methods that can enable it to move on the support arm 222. The top of the baffle 2312 is provided with an arc-shaped guiding part to prevent the packaging film from breaking during cold stretching. The rolling part 2313 includes a rotating arm 23132 rotatably connected to the moving block 2311 and a cylinder 23133 or a hydraulic cylinder connected to the rotating arm 23132. Rollers 23121 and 23131 are connected to both the baffle 2312 and the rolling part 2313. After the packaging film falls between the baffle 2312 and the rolling part 2313, the rolling part 2313 can rotate towards the baffle 2312 so that the rollers 23121 and 23131 are in contact with each other to fix the packaging film. When performing stretch film packaging, the cooperation between the roller 23121 and the roller 23131 can also play a role in guiding the packaging film during the film sleeving packaging process.

[0039] In this embodiment, the surface of the baffle 2312 facing the rolling part 2313 is set as an arc surface.

[0040] The packaging device further includes a film feeding device 3 for feeding and cutting the packaging film. The film feeding device 3 is an existing technology in cold stretching and will not be elaborated here. The packaging device also includes a controller and position detection elements. A plurality of position detection elements are provided. The position detection elements can be position sensors or other sensing components that can be used to detect positions, so as to detect the positions of the film pulling mechanisms 2A and 2B during the film pulling and packaging process and feedback them to the controller to achieve the automatic control of the device.

[0041] Working process:

[0042] After starting up, both the film pulling mechanisms 2A and 2B are located at positions above the packaging position 0. Among them, the film pulling mechanism 2A is located at the film receiving position below the film feeding device 3, and the distance between the grippers on the two support arms of the film pulling mechanism 2B is at the maximum position, waiting to receive the film. The distance between the grippers on the two support arms of the film pulling mechanism 2B should be greater than the distance between the grippers on the two support arms of the film pulling mechanism 2A;

[0043] During the process of the film pulling mechanism 2A performing the film receiving work, the items to be packaged are conveyed to the packaging position 0;

[0044] The four grippers 231 on the film pulling mechanism 2A synchronously stretch the packaging film outward to a specific size and move downward under the action of the first moving part 21 to cover the packaging film on the items to be packaged (the items to be packaged can be household electrical appliances or other items). During the process of the film pulling mechanism 2A stretching and packaging the film, the film pulling mechanism 2B synchronously runs to the film receiving position below the film feeding device 3 to perform the film receiving work;

[0045] After the film pulling mechanism 2A completes the packaging and film covering work, the 4 grippers on the two support arms of the film pulling mechanism 2A synchronously run outward to the maximum distance and rise to the top. At the same time, the packaging production line moves forward. At this time, the next item to be packaged is conveyed to the packaging position, and the film pulling mechanism 2B starts to perform the packaging and film covering work. The 4 grippers on the two support arms of the film pulling mechanism 2A running to the maximum distance means that the distance between the grippers on the two support arms of the film pulling mechanism 2A should be greater than the distance between the grippers on the two support arms of the film pulling mechanism 2B;

[0046] The film pulling mechanisms 2A and 2B alternately perform the film pulling and packaging according to the above process in a cycle.

[0047] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An alternating cold stretching packaging device, characterized in that, Including: A bracket and a film pulling device, wherein: the bracket has a plurality of support columns; the film pulling device is connected to the bracket and has two independently and oppositely arranged film pulling mechanisms A and B for cold stretching the packaging film. The film pulling mechanisms A and B are respectively connected to the support columns, and the two film pulling mechanisms A and B can reciprocate alternately on the support columns to alternately pull and package the articles passing through the packaging position by the two film pulling mechanisms A and B. In the alternating reciprocating working mode, when the film pulling mechanism A performs the film pulling and packaging work, the film pulling mechanism B performs the film receiving work. After the film pulling mechanism A finishes packaging the article, the film pulling mechanism B immediately packages the next article passing through the packaging position; there are four support columns, which are arranged vertically. In the top view state, the four support columns are arranged in a rectangle. The film pulling mechanism A is connected to the support columns A and B, and the film pulling mechanism B is connected to the support columns C and D. The bottoms of the support columns are connected by a reinforcing rod; The film pulling mechanism A is the same as the film pulling mechanism B. Taking the film pulling mechanism A as an example, the film pulling mechanism A includes a first moving part connected to the support column, a second moving part connected to the first moving part, and a film taking part connected to the second moving part; The first moving part includes first moving blocks respectively connected to two adjacent support columns A and B, a first connecting part connected to the two first moving blocks. The first moving blocks are moved on the support columns by means of a chain drive mode of connecting sprockets with a chain. The two first moving blocks move synchronously along the support columns, and the first connecting part is arranged horizontally and transversely; the second moving part includes two second moving blocks connected to the first connecting part, and support arms respectively connected to the two second moving blocks. The support arms are arranged horizontally and longitudinally, and the two second moving blocks move synchronously relative to or away from each other along the first connecting part; There are two groups of film taking parts, which are respectively connected to the support arms and can move synchronously. Each group of film taking parts is provided with two claws, and the two claws can move relative to or away from each other along the support arms; The claw includes a third moving block movably connected to the support arm, a baffle vertically connected to the third moving block, and a rotatable rolling part connected to the third moving block. An arc-shaped guiding part is arranged at the top of the baffle. The rolling part includes a rotating arm rotatably connected to the third moving block and a cylinder or a hydraulic cylinder connected to the rotating arm. Rollers are connected to both the baffle and the rotating arm. After the packaging film falls between the baffle and the rolling part, the rolling part rotates towards the baffle to make the rollers abut against each other to fix the packaging film. When performing stretch film packaging, the cooperation between the rollers can also play a role in guiding the packaging film during the film sleeving packaging process; the surface of the baffle facing the rolling part is set as an arc surface; The packaging equipment further includes a film feeding device for feeding and cutting the packaging film. The packaging equipment further includes a controller and position detection elements. A plurality of position detection elements are arranged to detect the positions of the film pulling mechanisms A and B during the film pulling and packaging process and feedback them to the controller; After starting up, both film pulling mechanisms A and B are located above the packaging position. Among them, film pulling mechanism A is at the film receiving position below the film feeding device, and the distance between the grippers on the two support arms of film pulling mechanism B is at the maximum position, waiting to receive the film. The distance between the grippers on the two support arms of film pulling mechanism B should be greater than the distance between the grippers on the two support arms of film pulling mechanism A; During the process of film pulling mechanism A performing the film receiving work, the items to be packaged are conveyed to the packaging position; The four grippers on film pulling mechanism A stretch the packaging film outward synchronously to a specific size and move downward under the action of the first moving part to cover the packaging film onto the items to be packaged. During the process of film pulling mechanism A stretching and packaging, film pulling mechanism B runs synchronously to the film receiving position below the film feeding device to perform the film receiving work; Film pulling mechanism A completes the packaging film covering work. The four grippers on the two support arms of film pulling mechanism A run outward synchronously to the maximum distance and rise to the top. At the same time, the packaging assembly line moves forward. At this time, the next item to be packaged is conveyed to the packaging position, and film pulling mechanism B starts to perform the packaging film covering work. The four grippers on the two support arms of film pulling mechanism A running to the maximum distance means that the distance between the grippers on the two support arms of film pulling mechanism A should be greater than the distance between the grippers on the two support arms of film pulling mechanism B; Film pulling mechanisms A and B alternately perform film pulling and packaging in cycles according to the above process.

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