Manipulator structure for winding, unwinding and stretching thin film
By using a roller device combining nylon wheels and deep groove ball bearings in the robotic arm, along with inclined guide pads and a top-clamping pin device, the problem of frictional resistance during film winding and unwinding is solved, achieving smooth positioning and efficient operation, improving packaging quality and reducing maintenance costs.
Patent Information
- Application Number
- CN202520150136.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing metal robotic arms are prone to frictional resistance and damage during the film unwinding and winding process, which affects packaging efficiency and quality.
The roller device, which combines nylon wheels and deep groove ball bearings, along with a guide pad device with an inclined angle and a top-tightening pin device, uses PTFE pads to reduce friction and adjusts the top-tightening force through a threaded sleeve and springs to achieve smooth positioning and adjustment of the film.
It reduces frictional resistance during film unwinding and winding, avoids damage, improves packaging efficiency and quality, simplifies maintenance and operation, and reduces costs.
Smart Images
Figure CN223865215U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of packaging equipment technology, specifically relating to a robotic arm structure for unwinding and stretching films. Background Technology
[0002] In the field of packaging equipment, the film packaging materials used, such as cold-stretch sleeve film, are often provided in the form of film rolls. During the production process, the film needs to be made into bags first, then wound into a robot arm, stretched, and then released to completely cover the goods.
[0003] For equipment such as cold stretch sleeve film packaging machines and heat shrink film packaging machines, if the goods need to be stackable or stored outdoors, they not only need to be dustproof and waterproof, but also need to achieve more comprehensive protection. Traditional four-sided coverage can no longer meet the needs. Therefore, a packaging device is needed that can quickly seal one side of the cold stretch sleeve film or heat shrink film to prevent the top of the goods from being exposed to the outdoor environment, thus achieving five-sided coverage packaging.
[0004] However, in existing technologies, cold stretch film wrapping machines commonly employ metal robotic arms, which are manufactured through casting, machining, or sheet metal processes. Although the surfaces of the metal robotic arms that come into contact with the film are polished to reduce friction, it is still difficult to completely avoid generating resistance to the film during the film unwinding process due to the inherent characteristics of the metal surface and possible minor unevenness. This can not only affect packaging efficiency but also cause film damage due to friction, affecting packaging quality and the effectiveness of cargo protection. Summary of the Invention
[0005] The purpose of this invention is to overcome the above-mentioned problems and provide a robotic arm structure for unwinding and stretching films, which can reduce the resistance of the film during unwinding and stretching, and simplify the manufacturing process and cost.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] This utility model provides a robotic arm structure for unwinding and stretching films, including a support base, a film guide pad device above the support base, an inclined angle on the side of the film guide pad device, a roller device above the film guide pad device, and a clamping pin device at the lower part of the support base, the clamping pin device being in close contact with the side of the film guide pad device.
[0008] The roller assembly includes a nylon wheel and a deep groove ball bearing, which are fixedly mounted on the upper part of the support base.
[0009] The guide film pad device includes a pad, which is fixedly disposed in the middle of the support base;
[0010] The clamping pin device includes a threaded sleeve, a clamping pin head, a spring, and a circular pull head. The clamping pin head is movably disposed inside the threaded sleeve, and the spring connects the clamping pin head and the circular pull head.
[0011] A further improvement of this invention is that the nylon wheel and the deep groove ball bearing are fixedly mounted on the upper part of the support base by bolts and retaining rings.
[0012] A further improvement of this invention is that the pad is a polytetrafluoroethylene pad.
[0013] A further improvement of this invention is that the tilt angle of the guide film pad device is 88°.
[0014] A further improvement of this utility model is that two pads are provided, and the two pads are respectively located on both sides of the middle of the support base.
[0015] A further improvement of this utility model is that two threaded holes are respectively opened on the two pads, and the clamping screws pass through the threaded holes to fix the left and right pads to the support base.
[0016] A further improvement of this utility model is that the support base is provided with two through holes, the top clamping pin device passes through the through holes, and the top clamping pin pressure head is in close contact with the side of the guide film pad device.
[0017] A further improvement of this invention is that two nylon wheels are provided.
[0018] A further improvement of this invention is that the two nylon wheels are respectively disposed on both sides of the upper part of the support base.
[0019] A further improvement of this utility model is that a clamping pin and a spring are provided inside the threaded sleeve. One end of the spring is fixedly connected to one end of the clamping pin, and the other end of the spring is fixedly connected to a ring pull head. The other end of the clamping pin extends out of the threaded sleeve.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] This invention provides a robotic arm structure for unwinding and stretching film. By placing a roller device at the top, a guide pad device with a certain tilt angle in the middle, and a clamping pin device at the bottom, precise positioning of the opening end of the film bag is achieved. When the film bag is stretched and the film sleeve is released, the tilt angle of the guide pad device allows the film to smoothly slide down the surface of the pad during release, avoiding damage or increased resistance caused by friction. The clamping pin device, through a combination of a threaded sleeve, a clamping pin pressure head, a spring, and a circular pull head, achieves a tight fit and flexible adjustment of the guide pad device. Furthermore, this robotic arm structure is easy to maintain and adjust, reducing maintenance costs and time, optimizing the operating experience, and providing users with excellent performance and convenient operation.
[0022] Furthermore, the pad is a polytetrafluoroethylene (PTFE) pad. The PTFE pad surface has an extremely low coefficient of friction and excellent self-lubricating properties, making it difficult for foreign matter to adhere. This allows the film to easily slide off when in contact with it, avoiding resistance or adhesion problems caused by friction.
[0023] Furthermore, each of the two pads has two threaded holes. The clamping screws pass through the threaded holes to fix the left and right pads to the support base. By rotating the screws, they can be tightly engaged with the threaded holes, generating a large locking force and ensuring a firm connection between the pads and the support base.
[0024] Furthermore, the threaded sleeve is equipped with a clamping pin and a spring. One end of the spring is fixedly connected to one end of the clamping pin, and the other end of the spring is fixedly connected to a ring pull head. The other end of the clamping pin extends out of the threaded sleeve. By adjusting the position of the ring pull head, the compression degree of the spring can be changed, thereby adjusting the clamping force of the clamping pin on the film. Attached Figure Description
[0025] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components of the present invention.
[0026] Figure 1 This is a schematic diagram of the structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the roller device of this utility model;
[0028] Figure 3 This is a schematic diagram of the nylon pad device of this utility model;
[0029] Figure 4 This is a schematic diagram of the top clamping pin device of this utility model.
[0030] The components include: 1. Support base; 2. Roller assembly; 21. Nylon wheel; 22. Deep groove ball bearing; 3. Guide film pad assembly; 31. Pad; 32. Threaded hole; 4. Tightening pin assembly; 41. Threaded sleeve; 42. Tightening pin pressure head; 43. Spring; 44. Ring pull head. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] The present invention will now be described in further detail with reference to the accompanying drawings:
[0038] This utility model provides a robotic arm structure for unwinding and stretching films, including a support base 1, a roller device 2, a film guide pad device 3, and a clamping pin device 4.
[0039] The support base 1 is equipped with a film guide pad device 3, which has an inclined angle on its side. A roller device 2 is also provided above the film guide pad device 3. A clamping pin device 4 is provided at the bottom of the support base 1, which is in close contact with the side of the film guide pad device 3. By placing the roller device 2 at the top, the film guide pad device 3 with a certain inclined angle in the middle, and the clamping pin device 4 at the bottom, the precise positioning of the opening end of the film bag is achieved. When the film bag is stretched and the film is released, the inclined angle of the film guide pad device 3 allows the film to slide smoothly along the surface of the pad during the release process, avoiding damage or increased resistance caused by friction.
[0040] like Figure 2 As shown, the roller device 2 includes a nylon wheel 21 and a deep groove ball bearing 22, which are fixedly mounted on the upper part of the support base 1 by bolts and retaining rings.
[0041] There are two nylon wheels 21, which are respectively located on both sides of the upper part of the support base 1.
[0042] like Figure 3 As shown, the guide film pad device 3 includes a pad 31, which is fixedly disposed in the middle of the support base 1. There are two pads 31, and the two pads 31 are respectively located on both sides of the middle of the support base 1. Two threaded holes 32 are opened on the two pads 31 respectively. The clamping screw passes through the threaded holes 32 to fix the left and right pads 31 to the support base 1. By rotating the screw, it can be tightly engaged with the threaded holes 32, which can generate a large locking force and ensure a firm connection between the pads 31 and the support base 1.
[0043] As a preferred option, the pad 31 is made of polytetrafluoroethylene (PTFE). The PTFE pad surface has an extremely low coefficient of friction and excellent self-lubricating properties, making it difficult for foreign matter to adhere. This allows the film to slide off easily when in contact with it, avoiding resistance or adhesion problems caused by friction.
[0044] The support base 1 has two through holes, the clamping pin device 4 passes through the through holes, and the clamping pin pressure head 42 is in close contact with the side of the guide film pad device 3.
[0045] like Figure 4 As shown, the clamping pin device 4 includes a threaded sleeve 41, a clamping pin pressure head 42, a spring 43, and a circular pull head 44. The clamping pin pressure head 42 is movably disposed inside the threaded sleeve 41. The spring 43 is also disposed inside the threaded sleeve 41. One end of the spring 43 is connected to the clamping pin pressure head 42, and the other end is connected to the circular pull head 44. By adjusting the position of the circular pull head 44, the compression degree of the spring 43 can be changed, thereby adjusting the clamping force of the clamping pin pressure head 42 on the film, further realizing the tight fit and flexible adjustment of the guide film pad device 3.
[0046] How to use
[0047] In use, the robotic arm structure of this utility model for unwinding and stretching film rotates a certain distance in the forward direction to deliver the film bag to the bottom of the robotic arm. By pulling the ring pull head 44, the top clamping pin head 42 at the bottom of the support base 1 is moved away from the film guide pad device 3, and the open end of the film bag is inserted. Then, the ring pull head 44 is released, so that the top clamping pin head 42 is pressed tightly against the film guide pad device 3, completing the bottom positioning of the film. The upper roller device 2 continues to rotate, completely retrieving the remaining part of the film bag onto the robotic arm. The robotic arm begins to expand and stretch. Next, the upper roller device 2 rotates in the reverse direction to release the entire film bag, which is then placed over the outside of the goods, completing the entire film-wrapping cycle.
[0048] Example 1
[0049] This embodiment provides a robotic arm structure for unwinding, winding, and stretching films, including a support base 1, a roller device 2, a film guide pad device 3, and a clamping pin device 4. The film guide pad device 3 is disposed above the support base 1, the roller device 2 is disposed above the film guide pad device 3, and the clamping pin device 4 is disposed at the lower part of the support base 1, with the clamping pin device 4 closely attached to the side of the film guide pad device 3.
[0050] The guide film pad device 3 has an inclined angle of 88° on its side. The guide film pad device 3 includes a polytetrafluoroethylene (PTFE) pad with two threaded holes 32. The clamping screw passes through the threaded holes 32 to fix the two PTFE pads on the left and right to the support base 1. The roller device 2 includes a nylon wheel 21 and a deep groove ball bearing 22. The nylon wheel 21 and the deep groove ball bearing 22 are fixed on the upper part of the support base 1 by bolts and retaining rings, and the roller device 2 is located above the guide film pad device 3.
[0051] The clamping pin device 4 includes a threaded sleeve 41, a clamping pin head 42, a spring 43, and a ring pull head 44. The clamping pin head 42 is movably disposed inside the threaded sleeve 41. The spring 43 is also disposed inside the threaded sleeve 41. One end of the spring 43 is connected to the clamping pin head 42, and the other end is connected to the ring pull head 44. The support base 1 is provided with two through holes. The clamping pin device 4 passes through the through holes, and the clamping pin head 42 is in close contact with the side of the guide film pad device 3.
[0052] The robotic arm structure for film winding, unwinding, and stretching provided in this embodiment achieves efficient and stable film winding, unwinding, and stretching operations through a carefully designed support base 1, roller device 2, guide pad device 3, and clamping pin device 4. Specifically, the tilt angle of the guide pad device 3 and its PTFE material effectively reduce friction and wear, improving the smoothness of film movement; the roller device 2 uses a combination of nylon wheels 21 and deep groove ball bearings 22 to ensure smooth and durable rolling; and the clamping pin device 4 provides adjustable and adaptable clamping force to the film. Overall, this robotic arm structure has advantages such as simple structure, convenient operation, wear resistance, and durability, making it suitable for various film winding, unwinding, and stretching operation scenarios.
[0053] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.
[0054] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.
Claims
1. A robotic arm structure for unwinding, rewinding, and stretching films, characterized in that, Includes a support base (1), a guide film pad device (3) is provided above the support base (1), the side of the guide film pad device (3) is provided with an inclination angle, a roller device (2) is provided above the guide film pad device (3), and a top-tightening pin device (4) is provided at the lower part of the support base (1), the top-tightening pin device (4) is closely attached to the side of the guide film pad device (3); The roller device (2) includes a nylon wheel (21) and a deep groove ball bearing (22), which are fixedly mounted on the upper part of the support base (1); The guide film pad device (3) includes a pad (31), which is fixedly disposed in the middle of the support base (1); The top-tightening pin device (4) includes a threaded sleeve (41), a top-tightening pin head (42), a spring (43), and a ring pull head (44). The top-tightening pin head (42) is movably disposed inside the threaded sleeve (41), and the spring (43) connects the top-tightening pin head (42) and the ring pull head (44).
2. The robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, The nylon wheel (21) and the deep groove ball bearing (22) are fixedly mounted on the upper part of the support seat (1) by bolts and retaining rings.
3. The robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, The pad (31) is a polytetrafluoroethylene pad.
4. The robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, The tilt angle of the guide film pad device (3) is 88°.
5. The robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, Two pads (31) are provided, and the two pads (31) are located on both sides of the middle part of the support base (1).
6. A robotic arm structure for unwinding and stretching films according to claim 5, characterized in that, Two threaded holes (32) are respectively opened on the two pads (31), and the clamping screws pass through the threaded holes (32) to fix the left and right pads (31) on the support base (1).
7. A robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, The support base (1) has two through holes, the top-tightening pin device (4) passes through the through holes, and the top-tightening pin head (42) is in close contact with the side of the guide film pad device (3).
8. A robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, Two nylon wheels (21) are provided.
9. A robotic arm structure for unwinding and stretching films according to claim 8, characterized in that, The two nylon wheels (21) are respectively set on both sides of the upper part of the support base (1).
10. A robotic arm structure for unwinding and stretching films according to claim 1, characterized in that, The threaded sleeve (41) is provided with a clamping pin head (42) and a spring (43). One end of the spring (43) is fixedly connected to one end of the clamping pin head (42), and the other end of the spring (43) is fixedly connected to the ring pull head (44). The other end of the clamping pin head (42) extends out of the threaded sleeve (41).