Tension adjusting device for bag making machine

By using a combined structure of support frame, fixed roller, floating roller and single-rod double-acting cylinder in the bag making machine, combined with photoelectric proximity switch detection, the precise adjustment of the tension of the plastic film is achieved, solving the complex structure of the traditional device and The problem of poor control accuracy improves the production efficiency and product quality of the bag making machine.

CN222181301UActive Publication Date: 2024-12-17SHANDONG XINSONG IND SOFTWARE RES INST CO LTD
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Patent Information

Application Number
CN202323593479.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-27
Publication Date
2024-12-17
Estimated Expiration
2033-12-27

AI Technical Summary

Technical Problem

The plastic film tension adjustment device of traditional bag making machines has a complex structure and poor control accuracy, making it difficult to adjust the tension of plastic films of different materials, resulting in unstable bag making quality.

Method used

The structure adopts a structure including a support frame, a fixed roller, a floating roller, a floating roller bearing joint and a single-rod double-acting cylinder. The floating roller is driven to rotate around the fixed roller through the push rod of the cylinder, and the length of the plastic film is adjusted to control tension. And use photoelectric proximity switch to detect and adjust tension.

Benefits of technology

It realizes precise adjustment of the tension of plastic film, ensures that the tension is within a reasonable range, and improves the production efficiency and product quality of the bag making machine.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model belongs to the field of bag making machines, and particularly relates to a tension adjusting device for a bag making machine, which comprises a support frame, a fixed roller, a roller connecting plate, a floating roller, a floating roller bearing joint and a single-rod double-acting cylinder, the fixed roller is rotatably mounted on the support frame, and the floating roller is connected with the fixed roller through the roller connecting plate; a base of the single-rod double-acting air cylinder is hinged to the supporting frame, a push rod of the single-rod double-acting air cylinder is connected with the floating roller through a floating roller bearing connector, and the single-rod double-acting air cylinder drives the floating roller to rotate around a roller shaft of the fixed roller through stretching and retracting of the push rod. The tension of the plastic film is controlled by adjusting the length of the plastic film. According to the utility model, the horizontal bar double-acting cylinder is arranged to push the floating roller to control the tension of the plastic film, and the photoelectric proximity switch is arranged for detection, so that the tension can be always kept within a set range, and the transmission stability and the product quality are ensured.
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Description

Technical Field

[0001] The utility model belongs to the field of bag making machines, in particular to a tension regulating device for bag making machines. Background Art

[0002] Bag making machines are equipment for making plastic bags. They are made into packaging bags by cutting, heat sealing, and shearing plastic films. In the process of making plastic bags, the plastic film needs to be continuously conveyed, and at the same time, the traction tension of the plastic film needs to be kept within a certain range. If the tension is too small, the plastic bag will become loose, which may easily lead to inaccurate heat sealing position and cutting length of the bag, resulting in a large number of defective products; too much tension will make the plastic bag tight and may break the plastic film. In addition, for plastic films of different materials, different tension ranges are required, and the tension needs to be adjustable. The traditional tension adjustment device has a complex structure, complex tension adjustment, and poor control accuracy. Utility Model Content

[0003] In view of the above problems existing in the tension adjustment of the plastic film of the existing bag making machine, the purpose of the utility model is to provide a tension adjustment device for the bag making machine. The tension adjustment device can adjust the tension of the plastic film of the bag making machine and ensure the control accuracy, so as to control the tension of the plastic film within a set reasonable range.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model comprises a support frame, a fixed roller, a roller connecting plate, a floating roller, a floating roller bearing joint and a single-rod double-acting cylinder, wherein the fixed roller is rotatably mounted on the support frame, and the floating roller is connected to the fixed roller through the roller connecting plate; the base of the single-rod double-acting cylinder is hinged on the support frame, and the push rod of the single-rod double-acting cylinder is connected to the floating roller through the floating roller bearing joint; the single-rod double-acting cylinder drives the floating roller to rotate around the roller shaft of the fixed roller through the extension and retraction of the push rod, and controls the tension of the plastic film by adjusting the length of the plastic film.

[0006] Wherein: a cylinder bearing seat is fixedly connected to the support frame through a cylinder bearing seat support plate, the base of the single-rod double-acting cylinder is hinged to the cylinder bearing seat, one end of the floating roller bearing joint is rotatably connected to the floating roller, the other end of the floating roller bearing joint is connected to the push rod of the single-rod double-acting cylinder, and the end face of the other end of the floating roller bearing joint is perpendicular to the push rod of the single-rod double-acting cylinder, and the force of the single-rod double-acting cylinder acting on the floating roller remains unchanged.

[0007] A photoelectric proximity switch fixing plate is installed on the support frame, and the installation position of the photoelectric proximity switch fixing plate on the support frame can be adjusted. The photoelectric proximity switch fixing plate is installed on the photoelectric proximity switch fixing plate for detecting the lowest position of the floating roller rotating downward.

[0008] The support frame is provided with a strip hole, and the photoelectric proximity switch fixing plate is connected with a quick tightening handle and a fixing screw passing through the strip hole. The position of the photoelectric proximity switch is changed by adjusting the position of the photoelectric proximity switch fixing plate, and the quick tightening handle and the fixing screw are tightened respectively after the position is adjusted.

[0009] Both ends of the roller connecting plate are provided with roller shaft holes along the thickness direction, and the roller shaft holes at both ends are respectively used to install the shaft ends of the fixed roller and the floating roller, and the ends at both ends of the roller shaft holes are open, and the openings are connected to the roller shaft holes, and connecting screw holes are provided on the upper and lower sides of the opening, and after the shaft ends of the fixed roller and the floating roller are inserted into the roller shaft holes, the shaft ends of the fixed roller and the floating roller are fixed by screwing the connecting screws into the connecting screw holes.

[0010] The support frame includes a right support plate, a left support plate and a connecting shaft, the right support plate is connected to the left support plate by a connecting shaft, bearing seats are installed on the right support plate and the left support plate, and the two shaft ends of the fixed roller are rotatably connected to the bearing seats respectively; the single-rod double-acting cylinder is installed on the right support plate or the left support plate, the photoelectric proximity switch fixing plate is installed on the left support plate or the right support plate, or the single-rod double-acting cylinder and the photoelectric proximity switch fixing plate are installed on the same side.

[0011] The axial center line of the fixed roller is perpendicular to the right support plate and the left support plate, and the axial center line of the floating roller is parallel to the axial center line of the fixed roller.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The utility model realizes the control of the tension of the plastic film by setting a single-bar double-acting cylinder to push the floating roller, and is provided with a photoelectric proximity switch for detection, which can always keep the tension within the set range, ensure the transmission stability, and ensure the product quality.

[0014] 2. The utility model adjusts the tension of the plastic film by adjusting the gas pressure of the single-bar double-acting cylinder. The adjusting device has a simple structure and is easy to operate, thereby achieving rapid adjustment of the tension of the plastic film and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the left side of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the right side of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the roller connecting plate of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the working state of the utility model;

[0019] Among them: 1 is the right support plate, 2 is the left support plate, 3 is the fixed roller, 4 is the roller connecting plate, 41 is the roller shaft hole, 42 is the connecting screw hole, 5 is the floating roller, 6 is the bearing seat, 7 is the floating roller bearing joint, 8 is the single-rod double-acting cylinder, 9 is the cylinder bearing seat, 10 is the cylinder bearing seat support plate, 11 is the photoelectric proximity switch fixing plate, 12 is the quick tightening handle, 13 is the photoelectric proximity switch, 14 is the fixing screw, 15 is the connecting screw, 16 is the connecting shaft, and 17 is the plastic film. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 , Figure 2 As shown, the utility model includes a support frame, a fixed roller 3, a roller connecting plate 4, a floating roller 5, a floating roller bearing joint 7 and a single-rod double-acting cylinder 8, wherein the fixed roller 3 is rotatably installed on the support frame, and the floating roller 5 is connected to the fixed roller 3 through the roller connecting plate 4; the base of the single-rod double-acting cylinder 8 is hinged on the support frame, and the push rod of the single-rod double-acting cylinder 8 is connected to the floating roller 5 through the floating roller bearing joint 7, and the single-rod double-acting cylinder 8 drives the floating roller 5 to rotate around the roller axis of the fixed roller 3 by retracting and extending the push rod, and controls the tension of the plastic film 17 by adjusting the length of the plastic film 17.

[0022] The support frame of this embodiment includes a right support plate 1, a left support plate 2 and a connecting shaft 16. The right support plate 1 and the left support plate 2 have the same shape and are symmetrically arranged. The right support plate 1 and the left support plate 2 are connected by two connecting shafts 16, so that the relative position of the right support plate 1 and the left support plate 2 is fixed; the right support plate 1 and the left support plate 2 are both installed with a bearing seat 6, and the two shaft ends of the fixed roller 3 are respectively rotatably connected to the bearing seat 6; the axial center line of the fixed roller 3 is perpendicular to the right support plate 1 and the left support plate 2, and the axial center line of the floating roller 5 is parallel to the axial center line of the fixed roller 3. The single-rod double-acting cylinder 8 is installed on the right support plate 1 or the left support plate 2, and the photoelectric proximity switch fixing plate 11 is installed on the left support plate 2 or the right support plate 1, or the single-rod double-acting cylinder 8 and the photoelectric proximity switch fixing plate 11 are installed on the same side.

[0023] In this embodiment, the two axial ends of the floating roller 5 are connected to the two axial ends of the fixed roller 3 through the roller connecting plate 4. Figure 3 As shown, both ends of the roller connecting plate 4 of this embodiment are provided with roller shaft holes 41 along the thickness direction, and the roller shaft holes 41 at both ends are used to install the shaft ends of the fixed roller 3 and the floating roller 5 respectively. The ends of both ends of the roller shaft holes 41 are open, and the openings are connected with the roller shaft holes 41. Connecting screw holes 42 are provided on the upper and lower sides of the opening. After the shaft ends of the fixed roller 3 and the floating roller 5 are inserted into the roller shaft holes 41, the shaft ends of the fixed roller 3 and the floating roller 5 are fixed by screwing the connecting screws 15 into the connecting screw holes 42, thereby ensuring the positional relationship between the fixed roller 3 and the floating roller 5.

[0024] The single-rod double-acting cylinder 8 of this embodiment is installed on the outer side surface of the right support plate 1, and a cylinder bearing seat 9 is fixedly connected to the outer side surface of the right support plate 1 through a cylinder bearing seat support plate 10. The base of the single-rod double-acting cylinder 8 is hinged to the cylinder bearing seat 9, so that the single-rod double-acting cylinder 8 can rotate around the cylinder bearing seat 9. One end of the floating roller bearing joint 7 is rotatably connected to the axial end of the floating roller 5, and the other end of the floating roller bearing joint 7 is connected to the push rod of the single-rod double-acting cylinder 8. The floating roller bearing joint 7 can rotate around the axial end of the floating roller 5 to ensure that the end surface of the other end of the floating roller bearing joint 7 is perpendicular to the push rod of the single-rod double-acting cylinder 8. The force of the single-rod double-acting cylinder 8 on the floating roller 5 remains unchanged and will not change with the position change of the floating roller 5; the floating roller bearing joint 7 is controlled to push the floating roller 5 to rotate around the fixed roller 3 by extending and retracting the push rod of the single-rod double-acting cylinder 8.

[0025] The left support plate 2 of this embodiment is provided with a photoelectric proximity switch fixing plate 11, and the installation position of the photoelectric proximity switch fixing plate 11 on the left support plate 2 can be adjusted. The photoelectric proximity switch fixing plate 11 is provided with a photoelectric proximity switch 13 for detecting the lowest position of the floating roller 5 when it rotates downward. In this embodiment, a strip hole 18 is provided on the left support plate 2, and a quick tightening handle 12 and a fixing screw 14 passing through the strip hole 18 are connected to the photoelectric proximity switch fixing plate 11. The position of the photoelectric proximity switch 13 is changed by adjusting the position of the photoelectric proximity switch fixing plate 11, and the quick tightening handle 12 is manually tightened after the position is adjusted, and then the fixing screw 14 is tightened. The photoelectric proximity switch 13 detects the shaft end of the floating roller 5, and when the floating roller 5 rotates to the detection position of the photoelectric proximity switch 13, the photoelectric proximity switch 13 gives a signal feedback.

[0026] The working principle of the utility model is:

[0027] The plastic film 17 passes by the bottom of the floating roller 5. By setting the gas pressure of the single-bar double-acting cylinder 8, the push rod of the single-bar double-acting cylinder 8 pushes the floating roller 5 to rotate around the fixed roller. When the tension passing through the plastic film 17 is small, the push rod of the single-bar double-acting cylinder 8 pushes the floating roller 5 to rotate downward around the fixed roller. Figure 4 As shown, the tension of the plastic film 17 is increased by extending the length of the plastic film 17; when the tension of the plastic film 17 is large, the plastic film 17 will push the floating roller 5 upward in the reverse direction, and the floating roller 5 can push the push rod of the single-bar double-acting cylinder 8 in the reverse direction to contract, so that the tension of the plastic film 17 is controlled within a set range, and the tension of the plastic film 17 can be adjusted by adjusting the gas pressure of the single-bar double-acting cylinder 8. A photoelectric proximity switch 13 is provided on the left support plate 2, which is used to detect the rotation position of the floating roller 5, and to realize real-time signal feedback to the bag making machine control system (the bag making machine control system is the prior art), and the tension of the plastic film 17 is always within a reasonable range by adjusting the gas pressure of the single-bar double-acting cylinder 8.

[0028] The utility model controls the rotation of the floating roller 5 to control the tension of the plastic film 17 within a set range, and the utility model has a simple structure and is easy to operate, and can realize rapid adjustment of the tension of the plastic film 17 .

Claims

1. A tension adjustment device for a bag making machine, Features: The invention comprises a support frame, a fixed roller (3), a roller connecting plate (4), a floating roller (5), a floating roller bearing joint (7) and a single-rod double-acting cylinder (8), wherein the fixed roller (3) is rotatably mounted on the support frame, and the floating roller (5) is connected to the fixed roller (3) via the roller connecting plate (4); the base of the single-rod double-acting cylinder (8) is hinged on the support frame, and the push rod of the single-rod double-acting cylinder (8) is connected to the floating roller (5) via the floating roller bearing joint (7); the single-rod double-acting cylinder (8) drives the floating roller (5) to rotate around the roller axis of the fixed roller (3) by extending and retracting the push rod, thereby controlling the tension of the plastic film (17) by adjusting the length of the plastic film (17).

2. The tension adjusting device for a bag making machine according to claim 1, Features: A cylinder bearing seat (9) is fixedly connected to the support frame via a cylinder bearing seat support plate (10); the base of the single-rod double-acting cylinder (8) is hinged to the cylinder bearing seat (9); one end of the floating roller bearing joint (7) is rotatably connected to the floating roller (5); the other end of the floating roller bearing joint (7) is connected to a push rod of the single-rod double-acting cylinder (8); and the end surface of the other end of the floating roller bearing joint (7) is perpendicular to the push rod of the single-rod double-acting cylinder (8); the force of the single-rod double-acting cylinder (8) acting on the floating roller (5) remains unchanged.

3. The tension adjusting device for a bag making machine according to claim 1, Features: A photoelectric proximity switch fixing plate (11) is mounted on the support frame, the mounting position of the photoelectric proximity switch fixing plate (11) on the support frame being adjustable, and a photoelectric proximity switch (13) for detecting the lowest position of the floating roller (5) when it rotates downward is mounted on the photoelectric proximity switch fixing plate (11).

4. The tension adjusting device for a bag making machine according to claim 3, Features: The support frame is provided with a strip hole (18), and the photoelectric proximity switch fixing plate (11) is connected with a quick-tightening handle (12) and a fixing screw (14) passing through the strip hole (18). The position of the photoelectric proximity switch (13) is changed by adjusting the position of the photoelectric proximity switch fixing plate (11), and the quick-tightening handle (12) and the fixing screw (14) are respectively tightened after the position is adjusted.

5. The tension adjusting device for a bag making machine according to claim 1, Features: Both ends of the roller connecting plate (4) are provided with roller shaft holes (41) along the thickness direction. The roller shaft holes (41) at both ends are respectively used to mount the shaft ends of the fixed roller (3) and the floating roller (5). The ends of both ends of the roller shaft hole (41) are open, and the openings are connected to the roller shaft holes (41). The upper and lower sides of the openings are provided with connecting screw holes (42). After the shaft ends of the fixed roller (3) and the floating roller (5) are inserted into the roller shaft holes (41), the shaft ends of the fixed roller (3) and the floating roller (5) are fixed by screwing connecting screws (15) into the connecting screw holes (42).

6. The tension adjusting device for a bag making machine according to claim 1, Features: The support frame comprises a right support plate (1), a left support plate (2) and a connecting shaft (16); the right support plate (1) is connected to the left support plate (2) via the connecting shaft (16); a bearing seat (6) is installed on the right support plate (1) and the left support plate (2); two shaft ends of the fixed roller (3) are respectively rotatably connected to the bearing seat (6); the single-rod double-acting cylinder (8) is installed on the right support plate (1) or the left support plate (2); the photoelectric proximity switch fixing plate (11) is installed on the left support plate (2) or the right support plate (1), or the single-rod double-acting cylinder (8) and the photoelectric proximity switch fixing plate (11) are installed on the same side.

7. The tension adjusting device for a bag making machine according to claim 6, Features: The axial center line of the fixed roller (3) is perpendicular to the right support plate (1) and the left support plate (2), and the axial center line of the floating roller (5) is parallel to the axial center line of the fixed roller (3).