Three-fold plastic bag device
By designing a three-fold plastic bag device, which utilizes a robotic arm and an adjustable receiving belt, the problem of space and size adaptation in the production of large plastic bags is solved, achieving an efficient and low-cost automated folding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 嘉兴海强机械科技有限公司
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-12
AI Technical Summary
Large plastic bags require a large amount of space and a long production line during production, and it is difficult to adapt to plastic bags of different sizes, resulting in high production costs and complex production line adjustments.
The three-fold plastic bag device includes a frame, a robotic arm, and multiple workstations. Through the reciprocating motion of the robotic arm and an adjustable receiving belt, it can automatically fold plastic bags of different sizes, reducing the length of the production line and the complexity of adjustments.
It enables convenient folding of plastic bags of different sizes, shortens the production line length, reduces production costs, and improves production efficiency.
Smart Images
Figure CN224224667U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic bag production technology, and in particular to a three-fold plastic bag device. Background Technology
[0002] The production of large plastic bags is cumbersome due to their large size. Folding them after they are fully flattened requires a lot of space and necessitates extending the production line, further increasing production costs. Furthermore, large plastic bags still present the challenge of adapting to different sizes. Changing the size of the plastic bag to be folded during production requires adjusting numerous locations to accommodate different sizes, which is also costly. Therefore, a plastic bag folding device is needed that can conveniently receive and fold plastic bags of different sizes while controlling costs and avoiding excessively long production lines. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a three-fold plastic bag device to address the above-mentioned technical deficiencies.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: It includes a frame, and a first-folding station, a second-folding station, and a third-folding station arranged sequentially on the frame; it also includes a robotic arm that reciprocates between the upper sides of the three stations; the gripping direction of the robotic arm is oriented towards the first-folding station; a receiving belt with one end fixed to the frame is provided on the frame; the non-fixed side of the receiving belt is arranged around a first roller; the first roller is movably arranged on the frame along two side roller frames; the first-folding station is the area from the fixed connection position of the receiving belt to the position around the first roller; a first pressure plate is provided above the second-folding station, oriented towards the second-folding station; the third-folding station is located below the movement path of the robotic arm.
[0005] To further optimize this technical solution, a second roller is also provided on the roller frame below the first roller; the other end of the receiving belt is fixed to the frame after passing around the second roller; a mounting frame parallel to the folding station is also provided on the roller frame; a first notch is provided on the mounting frame for the robot arm to grip the plastic bag.
[0006] To further optimize this technical solution, the frame is provided with a first drive mechanism for driving the reciprocating motion of the roller frame; the first drive mechanism includes a belt mounted on the frame and a motor for driving the belt to rotate; the roller frame is fixedly connected to the belt; and a slide rail is also provided between the roller frame and the frame.
[0007] To further optimize this technical solution, the two-fold station is mounted on the frame via a lower cylinder; a second notch is provided on the two-fold station facing the three-fold station for the robotic arm to grip the plastic bag; the first pressure plate on the upper side of the two-fold station is driven by a cylinder.
[0008] To further optimize this technical solution, a pressure plate mechanism is also provided on the side of the three-fold station facing the two-fold station; the pressure plate mechanism includes a transverse cylinder mounted on the frame; a base plate is provided on the telescopic end of the transverse cylinder; and a second pressure plate is mounted on the base plate via a longitudinal cylinder.
[0009] To further optimize this technical solution, the side of the three-fold station away from the two-fold station does not have a folding or flipping device for plastic bags.
[0010] To further optimize this technical solution, the robotic arm includes a gripping base plate and a pressing plate disposed on the gripping base plate to press the plastic bag onto the gripping base plate; the gripping base plate and the pressing plate of the robotic arm are arranged facing the input direction of the plastic bag.
[0011] To further optimize this technical solution, the pressure plate on the robotic arm is rotatably connected to the robotic arm; the robotic arm is also equipped with a cylinder; the telescopic end of the cylinder is connected to the pressure plate through a joint bearing.
[0012] To further optimize this technical solution, a second drive mechanism for driving the reciprocating motion of the robotic arm is provided on the frame; the second drive mechanism includes a belt arranged along the length of the frame and a motor that drives the belt to rotate on one side; the robotic arm is fixedly connected to the belt; a slide rail is also provided between the robotic arm and the frame.
[0013] To further optimize this technical solution, a pressure block is provided on the upper side of the three-fold station, facing the three-fold station; the upper side of the pressure block is driven by a cylinder.
[0014] Compared with the prior art, this utility model has the following advantages: 1. In the three-fold process, the position with the largest size is the first fold position. An adjustable receiving plate is set at the first fold position to accommodate plastic bags of different sizes. At the same time, when the plastic bag is flattened and falls into the adjusting plate, the retraction of the adjusting plate allows one side of the plastic bag to hang naturally. Since the plastic bag is large at this time, the plastic bag will not slide down the entire hanging position after part of it hangs down. Then, the robot arm will fold and take away the plastic bag at the hanging position, which reduces the requirements for the length of the production line, shortens the size of the production line, and completes the one-fold process at the same time.
[0015] 2. At the second fold position, after the plastic bag is pulled to the two-fold station, the plastic bag part hangs down naturally. At this time, since the plastic bag has been shortened, the first pressure plate presses the plastic bag located at the two-fold station, and then the robot arm takes the plastic bag away from the two-fold station along the second notch, completing the second fold process.
[0016] 3. After the plastic bag enters the three-fold station, traditional plastic bag folding devices require an additional folding or flipping structure for the tail end to achieve folding, which is still costly. At the same time, since large plastic bags are thick after two folds, it is not easy to set up a typical flipping. By setting a pressure plate mechanism on one side of the three-fold station, the plastic bag is pressed down at the three-fold station. Then, the robotic arm releases the gripping part of the plastic bag and retracts, so that the plastic bag part on the upper robotic arm is pushed back to achieve a third fold under the push of the robotic arm. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the three-fold plastic bag device.
[0018] Figure 2 This is a side view of the one-fold station structure of the three-fold plastic bag device.
[0019] Figure 3 This is a side view of the two-fold station structure of the three-fold plastic bag device.
[0020] Figure 4 This is a schematic diagram of the side structure of the three-fold station of the three-fold plastic bag device.
[0021] Figure 5 This is a schematic diagram of the bottom structure of the three-fold station of the three-fold plastic bag device.
[0022] Figure 6 This is a schematic diagram of the robotic arm structure for a three-fold plastic bag device.
[0023] In the diagram: 1. Single-fold station; 2. Double-fold station; 3. Triple-fold station; 4. Robot arm; 5. Frame; 101. Receiving belt; 102. First roller; 103. Roller frame; 104. Second roller; 105. Mounting frame; 106. First notch; 107. First drive mechanism; 201. First pressure plate; 202. Second notch; 301. Pressure plate mechanism; 302. Horizontal cylinder; 303. Base plate; 304. Vertical cylinder; 305. Second pressure plate; 306. Pressure block; 401. Clamping base plate; 402. Pressure plate; 403. Second drive mechanism. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0025] Detailed implementation method: combined with Figure 1-6 As shown, the system includes a frame 5, and three folding stations 1, 2, and 3 arranged sequentially on the frame 5; it also includes a robotic arm 4 that reciprocates between the three stations; the robotic arm 4 is positioned with its gripping direction towards the one-folding station 1; a receiving belt 101 with one end fixed to the frame 5 is provided on the frame 5; the non-fixed side of the receiving belt 101 is arranged around a first roller 102; the first roller 102 is movably arranged on the frame 5 along two side roller frames 103; the one-folding station 1 is the area from the fixed connection position of the receiving belt 101 to the position around the first roller 102; a first pressure plate 201 is provided above the two-folding station 2 and is positioned towards the two-folding station 2; the three-folding station 3 is located below the movement path of the robotic arm 4.
[0026] A second roller 104 is also provided on the roller frame 103 below the first roller 102; the other end of the receiving belt 101 is fixed to the frame 5 after passing around the second roller 104; a mounting frame 105 parallel to the folding station 1 is also provided on the roller frame 103; a first notch 106 for the robot arm 4 to grip the plastic bag is provided on the mounting frame 105.
[0027] Combination Figure 1-6 As shown, the frame 5 is provided with a first drive mechanism 107 for driving the roller frame 103 to reciprocate; the first drive mechanism 107 includes a belt disposed on the frame 5 and a motor for driving the belt to rotate; the roller frame 103 is fixedly connected to the belt; a slide rail is also provided between the roller frame 103 and the frame 5.
[0028] Combination Figure 1-6 As shown, the two-fold station 2 is mounted on the frame via a lower cylinder; the two-fold station can be raised and lowered; a second notch 202 is provided on the two-fold station 2 facing the three-fold station 3 for the robotic arm 4 to grip the plastic bag; the first pressure plate 201 on the upper side of the two-fold station 2 is driven by a cylinder.
[0029] Combination Figure 1-6As shown, the three-fold station 3 is also provided with a pressure plate mechanism 301 on the side facing the two-fold station 2; the pressure plate mechanism 301 includes a transverse cylinder 302 mounted on the frame 5; a base plate 303 is mounted on the telescopic end of the transverse cylinder 302; and a second pressure plate 305 is mounted on the base plate 303 via a longitudinal cylinder 304.
[0030] The three-fold station 3 is not equipped with a folding or flipping device for plastic bags on the side away from the two-fold station 2.
[0031] The robotic arm 4 includes a clamping base plate 401 and a pressing plate 402 disposed on the clamping base plate 401 to press the plastic bag onto the clamping base plate 401; the clamping base plate 401 and the pressing plate 402 of the robotic arm 4 are arranged facing the input direction of the plastic bag.
[0032] Combination Figure 1-6 As shown, the pressure plate 402 on the robotic arm 4 is rotatably connected to the robotic arm 4; the robotic arm 4 is also equipped with a cylinder; the telescopic end of the cylinder is connected to the pressure plate 402 through a spherical bearing.
[0033] The frame 5 is provided with a second drive mechanism 403 for driving the reciprocating motion of the robot arm 4; the second drive mechanism 403 includes a belt arranged along the length of the frame 5 and a motor that drives the belt to rotate on one side; the belt is fixedly connected to the robot arm 4; a slide rail is also provided between the robot arm 4 and the frame 5.
[0034] The upper side of the three-folding station 3 is provided with a pressing block 306 facing the three-folding station 3; the upper side of the pressing block 306 is driven by a cylinder.
[0035] Combination Figure 1-6 As shown, in the folding process, the front production line stacks the finished plastic bags onto the receiving belt 101 at the folding station 1. Due to the differences in the sizes of large plastic bags, the flat state before folding varies the most. The quickly adjustable receiving belt 101 can be adjusted to a suitable length to achieve size compatibility for large plastic bags of different sizes. At the same time, when receiving the plastic bags, the receiving belt 101 also ensures that the plastic bags are received flat, avoiding the problem of thinner plastic bags being placed one by one and directly partially hanging down, which can easily cause lateral drifting and displacement, affecting the neatness of the folding. After the stacked plastic bags are placed, the receiving belt 101 retracts, causing some of the stacked plastic bags to hang down. At this time, because the plastic bags are large, the plastic bags will not slide down the hanging position as a whole. Then, the robotic arm 4 clamps and pulls the plastic bags away at the hanging position along the first notch 106 of the mounting frame 105, thus completing the folding process.
[0036] Combination Figure 1-6As shown, in the two-fold process, after the robot arm 4 drags the plastic bag to the two-fold station 2, the first pressure plate 201 on the upper side of the two-fold station 2 presses the part of the plastic bag located at the two-fold station 2. Then, after the robot arm 4 releases the plastic bag, the two-fold station 2 is pushed up by the cylinder on the lower side of the two-fold station 2, so that the robot arm 4 corresponds to the position of the second notch 202 of the two-fold station 2. Further, the robot arm 4 re-grips the plastic bag along the position of the second notch 202 and drags it away, realizing the two-fold process of the plastic bag.
[0037] Combination Figure 1-6 As shown, in the three-fold process, after the plastic bag is dragged to the three-fold station 3, the pressure plate mechanism 301 on one side is activated, and the horizontal cylinder 302 is activated to push the pressure plate laterally along one side of the three-fold station 3. Then, the vertical cylinder 304 is activated to raise the pressure plate to a position above the plastic bag at the three-fold station 3. Then, the horizontal cylinder 302 retracts to push the pressure plate back to the top of the plastic bag at the three-fold station 3. Then, the vertical cylinder 304 retracts to achieve lateral pressure of the pressure plate on the plastic bag. At this time, one side of the plastic bag is held by the robot arm 4. After the cylinder on the robot arm 4 retracts and drives the pressure plate 402 to lift, the plastic bag part is still located on the clamping plate of the robot arm 4. Then, the robot arm 4 moves back to push the part of the plastic bag located on the clamping plate back to the top of the plastic bag at the three-fold station 3 to complete the three-fold.
[0038] Combination Figure 1-6 As shown, the robotic arm 4 is driven by the second drive mechanism 403 to achieve reciprocating motion on the frame 5. The cylinder pushes the pressure plate 402 to rotate, which further realizes the clamping of the plastic bag part on the clamping base plate 401. At the same time, the end of the cylinder is connected to the pressure plate 402 through the joint bearing, which can convert the pushing of the cylinder into the rotation of the pressure plate 402.
[0039] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.
[0040] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. A three-fold plastic bag device, characterized in that: The system includes a frame (5), and a single-fold station (1), a double-fold station (2), and a triple-fold station (3) arranged sequentially on the frame (5); it also includes a robotic arm (4) that reciprocates between the upper sides of the three stations; the robotic arm (4) is positioned with its gripping direction toward the single-fold station (1); a receiving belt (101) with one end fixed to the frame (5) is provided on the frame (5); the non-fixed side of the receiving belt (101) is arranged around a first roller (102); the first roller (102) is movably arranged on the frame (5) along two side roller frames (103); the single-fold station (1) is the area between the fixed connection position of the receiving belt (101) and the frame (5) and the position around the first roller (102); a first pressure plate (201) is provided above the double-fold station (2) and is positioned toward the double-fold station (2); the triple-fold station (3) is located below the movement path of the robotic arm (4).
2. The three-fold plastic bag device according to claim 1, characterized in that: A second roller (104) is also provided on the roller frame (103) below the first roller (102); the other end of the receiving belt (101) is fixed to the frame (5) after passing around the second roller (104); a mounting frame (105) parallel to the folding station (1) is also provided on the roller frame (103); a first notch (106) for the robot arm (4) to grip the plastic bag is provided on the mounting frame (105).
3. The three-fold plastic bag device according to claim 2, characterized in that: The frame (5) is provided with a first drive mechanism (107) for driving the roller frame (103) to reciprocate; the first drive mechanism (107) includes a belt on the frame (5) and a motor for driving the belt to rotate; the roller frame (103) is fixedly connected to the belt; a slide rail is also provided between the roller frame (103) and the frame (5).
4. The three-fold plastic bag device according to claim 2, characterized in that: The two-fold station (2) is mounted on the frame by a lower cylinder; a second notch (202) is provided on the two-fold station (2) facing the three-fold station (3) for the robot arm (4) to grip the plastic bag; the first pressure plate (201) on the upper side of the two-fold station (2) is driven by a cylinder.
5. The three-fold plastic bag device according to claim 1, characterized in that: The three-fold station (3) is also provided with a pressure plate mechanism (301) on the side facing the two-fold station (2); the pressure plate mechanism (301) includes a transverse cylinder (302) on the frame (5); the extension end of the transverse cylinder (302) is provided with a base plate (303); a second pressure plate (305) is provided on the base plate (303) through a longitudinal cylinder (304).
6. The three-fold plastic bag device according to claim 5, characterized in that: The three-fold station (3) is not equipped with a folding or flipping device for plastic bags on the side away from the two-fold station (2).
7. The three-fold plastic bag device according to claim 1, characterized in that: The robotic arm (4) includes a clamping base plate (401) and a pressing plate (402) provided on the clamping base plate (401) to press the plastic bag onto the clamping base plate (401); the clamping base plate (401) and the pressing plate (402) of the robotic arm (4) are arranged facing the input direction of the plastic bag.
8. The three-fold plastic bag device according to claim 7, characterized in that: The pressure plate (402) on the robotic arm (4) is rotatably connected to the robotic arm (4); the robotic arm (4) is also equipped with a cylinder; the telescopic end of the cylinder is connected to the pressure plate (402) through a joint bearing.
9. The three-fold plastic bag device according to claim 8, characterized in that: The frame (5) is provided with a second drive mechanism (403) for driving the reciprocating motion of the robot (4); the second drive mechanism (403) includes a belt arranged along the length of the frame (5) and a motor that drives the belt to rotate on one side; the belt is fixedly connected to the robot (4); a slide rail is also provided between the robot (4) and the frame (5).
10. The three-fold plastic bag device according to claim 1, characterized in that: The upper side of the three-fold station (3) is provided with a pressure block (306) facing the three-fold station (3); the upper side of the pressure block (306) is driven by a cylinder.