Bag opening device for prefabricated bag packaging

Abstract

The utility model discloses a bag opening device for prefabricated bag packaging, which comprises a base, the base is provided with an adsorption unit, a feeding unit, a feeding unit and a restraining unit, the feeding unit comprises a shell, a supporting plate is arranged in the shell, the side face of the shell is provided with a vertically extending through groove, and the supporting plate is arranged in the through groove. The side face of the supporting plate is provided with a pull rod extending out of the through groove, an extension spring is arranged between the top of the outer side of the shell and the pull rod, an upper cover is arranged above the shell, a limiting hook is arranged at the bottom of the shell, and the limiting hook is rotationally connected to the shell and matched with the pull rod. The occupied space is not increased, and meanwhile, the upper cover is additionally arranged on the upper portion, so that full plastic bags can be prevented from falling off in the transferring process.

Description

Technical Field

[0001] This utility model belongs to the field of bag-making machine technology, and more specifically relates to a bag-making device for pre-made bag packaging. Background Technology

[0002] In existing technologies, the packaging of cups (such as thermos cups) typically involves manually opening the packaging bag and then placing the cups back into the bag to complete the packaging process. This manual packaging method suffers from low automation and low production efficiency.

[0003] Chinese patent application number CN2022217533855 discloses a bag-making machine, comprising: a base; an adsorption unit disposed on the base and including a lifting unit and a suction cup, the lifting unit being connected to the suction cup; a feeding unit disposed on the base and having a feeding bin; a conveying unit disposed on the base and including a driving unit and a pushing part disposed on the driving unit; and a restraining unit fixed on the base and disposed above the edge of the feeding bin, the restraining unit including an arm, wherein when the adsorption unit picks up a packaging bag disposed in the feeding bin, the arm presses against the edge of the packaging bag to open the opening of the packaging bag.

[0004] The feeding unit includes a housing, a support plate, and an elastic unit. The support plate is connected to the housing through the elastic unit and forms the bottom of the feeding hopper. The packaging bag is pressed between the support plate and the arm. The elastic unit includes a guide rod, a spring, a bushing, and a nut. One end of the guide rod is connected to the support plate. The bushing is sleeved on the guide rod. The two ends of the spring abut against the support plate and the bushing, respectively. The nut is threaded onto the guide rod and protrudes outside the housing.

[0005] The aforementioned patented technology utilizes the combined action of an adsorption unit and a constraint unit to open the packaging bag, and feeds material through a feeding unit, enabling continuous operation.

[0006] However, when the feeding unit is full of plastic bags, its support plate is at the lowest point, and a section of the guide rod extends very far from the bottom of the shell, taking up a lot of space. That is, when the feeding unit is placed on the base, it occupies a large storage space. At the same time, the plastic bags inside are not covered and are easily blown away during the transfer process. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a feeding unit that does not increase the space occupied when filled with plastic bags, while adding a top cover to prevent the filled plastic bags from falling off during transfer.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a bag-opening device for prefabricated bag packaging, comprising a base, an adsorption unit, a feeding unit, a conveying unit, and a constraint unit disposed on the base. The feeding unit comprises a housing, a support plate disposed inside the housing, a vertically extending through groove disposed on the side of the housing, a pull rod extending out of the through groove disposed on the side of the support plate, a tension spring disposed between the top outer side of the housing and the pull rod, a top cover disposed on the top of the housing, and a limit hook disposed on the bottom of the housing, the limit hook being rotatably connected to the housing and cooperating with the pull rod.

[0009] Furthermore, the inner wall of the housing is provided with vertically arranged guide rails, and the support plate is provided with guide sliders that cooperate with the guide rails.

[0010] Furthermore, the pull rod is cylindrical, and a sleeve is fitted onto the pull rod, with a tension spring connected to the sleeve.

[0011] Furthermore, the top of the housing is provided with an outwardly extending support edge, and the outer side of the upper cover is provided with a edging edge, which is fastened to the support edge.

[0012] Furthermore, a bagging platform is provided above the base, and a handle is provided above the top cover. When the feeding unit is placed into the base, the bagging platform blocks the movement of the handle and the top cover.

[0013] Furthermore, the handle has a guide opening, and the side of the bagging platform is provided with a guide rod that extends into the guide opening.

[0014] Compared with the prior art, the beneficial effects of this utility model are: by setting through grooves and pull rods, a part of the support plate can extend directly from the side to the outside of the shell. Combined with the tension spring above, the overall space occupied by the feeding unit does not change when the support plate is in any position, that is, whether or not it is full of plastic bags. At the same time, the top cover can prevent the plastic bags from flying out. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the bag-opening device for prefabricated bag packaging according to this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the feeding unit in this utility model;

[0017] Figure 3 This is a side view of the feeding unit in this utility model.

[0018] Reference numerals: 1. Base; 2. Adsorption unit; 3. Feeding unit; 31. Housing; 311. Through groove; 312. Limiting hook; 313. Guide rail; 314. Support outer edge; 32. Support plate; 321. Pull rod; 323. Guide slider; 33. Tension spring; 34. Top cover; 341. Handle; 3411. Guide opening; 342. Edge binding; 4. Feeding unit; 5. Constraint unit; 6. Bagging platform; 61. Guide rod. Detailed Implementation

[0019] Reference Figures 1 to 3 The embodiments of the bag-opening device for prefabricated bag packaging of this utility model are further described below.

[0020] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0022] A pre-made bag packaging bag opening device includes a base 1, on which an adsorption unit 2, a feeding unit 3, a feeding unit 4, and a constraint unit 5 are arranged. The feeding unit 3 includes a housing 31, in which a support plate 32 is arranged. A vertically extending through groove 311 is arranged on the side of the housing 31. A pull rod 321 extending out of the through groove 311 is arranged on the side of the support plate 32. A tension spring 33 is arranged between the top outer side of the housing 31 and the pull rod 321. A top cover 34 is arranged on the top of the housing 31. A limit hook 312 is arranged at the bottom of the housing 31, and the limit hook 312 is rotatably connected to the housing 31 and cooperates with the pull rod 321.

[0023] In this embodiment, the structure and usage of the adsorption unit 2, the feeding unit 4, and the constraint unit 5 are the same as those in the prior art, and will not be described in detail here.

[0024] Typically, a single bag-making device can accommodate plastic bags of different sizes simultaneously. However, these plastic bags require housings 31 of different sizes for storage. To improve production efficiency, multiple housings 31 filled with plastic bags are prepared for backup. Once the plastic bags in a housing 31 are used up, a new housing 31 filled with plastic bags is immediately placed into the device. In this embodiment, the support plate 32 can move up and down within the housing 31. When the housing is filled with plastic bags, the support plate 32 moves to the lowest point of the housing 31, and the pull rod 321 causes the tension spring 33 to extend. The limit hook 312 hooks the pull rod 321 to prevent the support plate 32 from moving upward. At the same time, the top cover 34 covers the top of the housing 31. When the housing is filled with plastic bags, the entire housing 31 does not extend outward to occupy additional space, and there is no need to reserve space below the device to avoid waste. At the same time, the cover can prevent the plastic bags above from falling during the transfer process.

[0025] When the bag is installed on the equipment, open the cover to expose the top plastic bag so that the adsorption unit 2 can grab it. At the same time, rotate the limiting hook 312 to release the pull rod 321. Under the action of the tension spring 33, the support plate 32 pushes the inner plastic bag to move upward step by step.

[0026] In this preferred embodiment, a vertically arranged guide rail 313 is provided on the inner side wall of the housing 31, and a guide slider 323 that cooperates with the guide rail 313 is provided on the support plate 32.

[0027] Multiple guide rails 313 are provided, and guide sliders 323 move vertically along guide rails 313 so that support plate 32 can move vertically up and down stably and avoid tilting.

[0028] like Figure 2 As shown, there are two through slots 311 in this embodiment. The two through slots 311 are arranged symmetrically. The through slots 311 are located in the middle of the housing 31. The two tension springs 33 are located at the top two ends of the housing 31. The two tension springs 33 are in an inclined state when connected to the pull rod 321.

[0029] In this preferred embodiment, the pull rod 321 is cylindrical, and a sleeve is fitted on the pull rod 321. The tension spring 33 is connected to the sleeve, and the sleeve is rotatably connected to the pull rod 321.

[0030] In this preferred embodiment, the top of the housing 31 is provided with an outwardly extending support edge 314, and the outer side of the upper cover 34 is provided with a edging 342, which is fastened to the support edge 314.

[0031] like Figure 2 and 3As shown, with the cooperation of the outer support edge 314 and the edging 342, the upper cover 34 is guided along the outer support edge 314 when it moves, and the upper cover 34 can be removed after the housing 31 has entered the designated position.

[0032] In this preferred embodiment, a bagging platform 6 is provided above the base 1, and a handle 341 is provided above the top cover 34. When the feeding unit 3 is placed into the base 1, the bagging platform 6 blocks the movement of the handle 341 and the top cover 34.

[0033] The handle 341 on the top cover 34 protrudes from the top cover 34. When the housing 31 is placed into the equipment, as the housing 31 moves into the equipment, the handle 341 will contact the edge of the bagging platform 6. The bagging platform 6 blocks the handle 341 and the top cover 34, causing the top cover 34 to slide relative to the housing 31, thereby opening the top of the housing 31 and exposing the plastic bag.

[0034] like Figure 1 As shown, in this preferred embodiment, the handle 341 has a guide opening 3411, and the side of the bagging platform 6 is provided with a guide rod 61 that extends into the guide opening 3411.

[0035] During the process of placing the housing 31 into the device and opening the top cover 34, the guide rod 61 extends into the guide port 3411, which simultaneously hooks the handle 341 to prevent the top cover 34 from falling off and to ensure that the top cover 34 moves smoothly, preventing the removed end from sinking downwards and making it difficult to remove the top cover 34.

[0036] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A bagging device for pre-made bag packaging, comprising a base, wherein the base is provided with a suction unit, a feeding unit, a feeding unit and a restraining unit, characterized in that: The feeding unit comprises a shell, a supporting plate is arranged in the shell, a vertical extending through slot is arranged on the side of the shell, a pull rod is arranged on the side of the supporting plate and extends out of the through slot, a tension spring is arranged between the top of the outer side of the shell and the pull rod, an upper cover is arranged above the shell, a limiting hook is arranged on the bottom of the shell and is rotationally connected to the shell and cooperates with the pull rod.

2. A bag-on-premade-pouch packaging apparatus according to claim 1, characterized in that: A vertical arranged guide rail is arranged on the inner side wall of the shell, and a guide slide block that cooperates with the guide rail is arranged on the supporting plate.

3. A bag-on-premade-pouch packaging apparatus as claimed in claim 2, characterized in that: The pull rod is cylindrical, a sleeve is sleeved on the pull rod, and the tension spring is connected to the sleeve.

4. A bag-on-premade-pouch packaging apparatus as claimed in claim 3, characterized in that: A support outer edge that extends outward is arranged on the top of the shell, and a cover edge is arranged on the outer side of the upper cover and is buckled on the support outer edge.

5. A bag-on-premade-pouch packaging apparatus as claimed in claim 4, characterized in that: A bag sleeving platform is arranged above the base, a handle is arranged above the upper cover, and when the feeding unit is placed in the base, the bag sleeving platform blocks the movement of the handle and the upper cover.

6. A bag-on-premade-pouch packaging apparatus as claimed in claim 5, characterized in that: The handle has a guide opening, and a guide rod that extends into the guide opening is arranged on the side of the bag sleeving platform.

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