Plain-end plastic bag folding mechanism

Abstract

The utility model discloses a plain end plastic bag folding mechanism which comprises a machine frame, a bag body containing plate is arranged on the machine frame, a telescopic plate capable of stretching and retracting is arranged below the bag body containing plate, a support is arranged above the bag body containing plate, a pressing rod and a lower fork plate are arranged on the support, and the pressing rod and the lower fork plate are arranged on the machine frame. A supporting plate is arranged on one side of the bag body containing plate, a clamping plate is hinged to the supporting plate, the telescopic plate stretches out and draws back towards the supporting plate, the telescopic plate is located above the supporting plate after stretching out, and the clamping plate, the pressing rod and the lower fork plate are all connected with a driving mechanism. Therefore, the rectangular plastic bag with the flat opening can be folded and bundled.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic bag production, and more specifically relates to a folding mechanism for flat-mouth plastic bags. Background Art

[0002] An authorized patent with the publication number CN218229713U of the applicant discloses a folding mechanism for plastic bag handles. Among them, through the telescopic plates with beveled sides on both sides, the handles with plastic bags can hang down on the telescopic plates, and then the handles are folded by the folding plates.

[0003] The above mechanism is for plastic bags with handles, and the handles are located on both sides of one end of the plastic bag. Currently, there is a type of flat-mouth plastic bag, that is, the plastic bag is rectangular as a whole (similar to a fresh-keeping bag), and there is no handle structure at the bag opening. Therefore, the telescopic plates with beveled sides in the above device will cause the two corners of the flat-mouth plastic bag to droop, and the folding of the bag body cannot be completed.

[0004] Therefore, the applicant improves the above disclosed structure so that it can perform the first folding of the flat-mouth plastic bag. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a folding mechanism that can initially fold a rectangular flat-mouth plastic bag to achieve the folding and bundling of the rectangular flat-mouth plastic bag.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A folding mechanism for flat-mouth plastic bags, including a frame, a bag body placement plate is arranged on the frame, a telescopic telescopic plate is arranged below the bag body placement plate, a bracket is arranged above the bag body placement plate, a pressing rod and a lower fork plate are arranged on the bracket, a support plate is arranged on one side of the bag body placement plate, a clamping plate is hinged on the support plate, the telescopic plate extends and retracts towards the support plate, and after the telescopic plate extends, it is located above the support plate, and a driving mechanism is connected to the clamping plate, the pressing rod and the lower fork plate.

[0007] Further, a guide rod is arranged on the side of the bag body placement plate facing the support plate, and a lower fork area for the lower fork plate to pass through is formed between the guide rod and the side of the bag body placement plate.

[0008] Further, the bag body placement plate is rotatably connected to the frame, and a driving mechanism is arranged between the bag body placement plate and the frame.

[0009] Further, the support plate is slidably connected to the frame.

[0010] Further, the telescopic plate includes a first insertion plate with beveled sides on both sides and a second insertion plate connected to the first insertion plate. The second insertion plate is detachably connected to the first insertion plate. A notch is provided on the second insertion plate, and the edge of the notch is stacked on the beveled side of the first insertion plate. Both ends of the notch are connected to the first insertion plate by screws.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: When the telescopic plate retracts, several flat-mouth plastic bags stacked together are grabbed by the transfer mechanism and placed on the surfaces of the bag body placement plate and the support plate (covering the clamping plate). The pressing rod first presses the bag body, and then the lower fork plate descends to fork the bag body, making the part of the bag body on the support plate hang naturally; the clamping plate opens, and the telescopic plate extends. During the extension process, the hanging part of the bag body is pushed to fold on the support plate. Then the clamping plate clamps the folded bag body. After the bag body placement plate rotates and descends, the support plate drives the folded bag body to move towards the folding mechanism at the rear of the frame. After the bag body is conveyed into the folding mechanism, the folding mechanism folds and packages the bag body multiple times, realizing the initial folding of the rectangular flat-mouth plastic bag to achieve the folding and bundling of the rectangular flat-mouth plastic bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of a state of the flat-mouth plastic bag folding mechanism of the present utility model;

[0013] Figure 2 It is a schematic structural diagram of another state of the flat-mouth plastic bag folding mechanism of the present utility model.

[0014] Reference numerals: frame 1; bag body placement plate 2; telescopic plate 3; bracket 4; lower fork plate 5; support plate 6; clamping plate 7; guide rod 8; sliding frame 9; first insertion plate 10; second insertion plate 11; cross frame 12; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In the description of the present utility model, it should be noted that for orientation terms, if there are terms such as "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as limiting the specific protection scope of the present utility model.

[0016] In addition, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0017] Refer to Figure 1 and Figure 2 for further description of the present utility model.

[0018] A flat-mouth plastic bag folding mechanism includes a frame 1. A bag placing plate 2 is arranged on the frame 1. A telescopic plate 3 is arranged below the bag placing plate 2. A bracket 4 is arranged above the bag placing plate 2. A pressing rod (not shown in the drawing) and a lower fork plate 5 are arranged on the bracket 4. A supporting plate 6 is arranged on one side of the bag placing plate 2. A clamping plate 7 is hinged on the supporting plate 6. The telescopic plate 3 telescopically moves towards the supporting plate 6. After the telescopic plate 3 extends out, it is located above the supporting plate 6. Driving mechanisms are connected to the clamping plate 7, the pressing rod, and the lower fork plate 5 respectively.

[0019] As Figure 1 shown, preferably in this embodiment, a cross frame 12 that respectively supports the pressing rod and the lower fork plate 5 is arranged on the bracket 4.

[0020] As Figure 1 shown, preferably in this embodiment, a guide rod 8 is arranged on one side of the bag placing plate 2 facing the supporting plate 6. A lower fork area through which the lower fork plate 5 can pass is formed between the guide rod 8 and the side edge of the bag placing plate 2.

[0021] As Figure 1 shown, preferably in this embodiment, the bag placing plate 2 is rotatably connected to the frame 1, and a driving mechanism is arranged between the bag placing plate 2 and the frame 1.

[0022] As Figure 1 shown, preferably in this embodiment, the supporting plate 6 is slidably connected to the frame 1.

[0023] As Figure 1 shown, preferably in this embodiment, a sliding frame 9 is arranged between the supporting plate 6 and the frame 1, and the sliding frame 9 is slidably connected to the frame 1.

[0024] As Figure 1As shown, preferably in this embodiment, the telescopic plate 3 includes a first insertion plate 10 with beveled sides on both sides and a second insertion plate 11 connected to the first insertion plate 10. The second insertion plate 11 is detachably connected to the first insertion plate 10. A notch is provided on the second insertion plate 11, and the edge of the notch is stacked on the beveled side of the first insertion plate 10. Both ends of the notch are connected to the first insertion plate 10 by screws.

[0025] Preferably in this embodiment, after the second insertion plate 11 is detached from the first insertion plate 10, the first insertion plate 10 can be directly used to fold the handle of a plastic bag with a handle, realizing the dual use of the device.

[0026] As Figure 1 shown, preferably in this embodiment, two telescopic plates 3 are provided on the bag body placement plate 2, and two support plates 6 are provided on the sliding frame 9.

[0027] The folding principle of the mechanism for a rectangular flat-mouth plastic bag is as follows:

[0028] First, as Figure 1 shown, the telescopic plate 3 retracts to the starting position. After several flat-mouth plastic bags stacked are grabbed by the transfer mechanism at the front end of the frame 1 and moved towards the bag body placement plate 2, the bag body is then placed on the surfaces of the bag body placement plate 2 and the support plate 6 (covering the clamping plate 7). The pressing rod on the bracket 4 first presses down to clamp the bag body on the bag body placement plate 2, and then the lower fork plate 5 descends. After contacting the bag body, the bag body is forked downward, so that the part of the bag body on the support plate 6 passes through the lower fork area and naturally hangs down;

[0029] Then, as Figure 2 shown, the clamping plate 7 on the support plate 6 first rotates and opens, and then the telescopic plate 3 extends. During the extension process, the hanging part of the bag body is pushed back onto the support plate 6, and the hanging part forms a fold. Then the clamping plate 7 clamps the folded bag body on the support plate 6. After clamping, the bag body placement plate 2 rotates and descends. Subsequently, the support plate 6 moves the folded bag body towards the folding mechanism at the rear of the frame 1. After the bag body is conveyed into the folding mechanism, the folding mechanism folds and packages the bag body multiple times.

[0030] The initial folding of the rectangular flat-mouth plastic bag is realized to achieve the folding and bundling of the rectangular flat-mouth plastic bag.

[0031] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A flat plastic bag folding mechanism, characterized by: The machine comprises a frame, a bag placing plate is arranged on the frame, a retractable telescopic plate is arranged below the bag placing plate, a bracket is arranged above the bag placing plate, a pressure rod and a lower fork plate are arranged on the bracket, a support plate is arranged on one side of the bag placing plate, a splint is hinged on the support plate, the telescopic plate is retracted toward the support plate, and the telescopic plate is located above the support plate after being extended, and a driving mechanism is connected to the splint, the pressure rod and the lower fork plate.

2. The flat plastic bag folding mechanism according to claim 1, characterized in that: A guide rod is arranged on one side of the bag body placement plate facing the support plate, and a lower fork area for the lower fork plate to pass through is formed between the guide rod and the side edge of the bag body placement plate.

3. The flat plastic bag folding mechanism according to claim 1, characterized in that: The bag body placement plate is rotatably connected to the frame, and a driving mechanism is arranged between the bag body placement plate and the frame.

4. The flat plastic bag folding mechanism according to claim 1, characterized in that: The support plate is slidably connected to the frame.

5. The flat plastic bag folding mechanism according to claim 1, characterized in that: The telescopic plate includes a first plug plate with oblique sides and a second plug plate connected to the first plug plate, and the second plug plate is detachably connected to the first plug plate. A notch is provided on the second plug plate, and the edge of the notch is overlapped on the oblique side of the first plug plate. Both ends of the notch are connected to the first plug plate by screws.

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