Anti-falling rubber band expansion device
By using an expansion mechanism consisting of a pre-tensioning arm and an expansion arm, and employing different drive mechanisms and connecting rod tooth meshing transmission, the problem of rubber bands easily sticking to the hook is solved, thus achieving stable expansion and accurate throwing of the rubber bands.
Patent Information
- Application Number
- CN202520176330.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-27
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-27
AI Technical Summary
In existing technologies, rubber bands tend to stick to hooks and cannot be detached, and uneven mass and size make it difficult for the support rod to stably attach the rubber bands, resulting in inaccurate throwing of the rubber bands.
The expansion mechanism consists of a pre-tensioning arm and an expansion arm, which are driven by different drive mechanisms. When the pre-tensioning arm is opened, the support rod is located on the upper side of the hook, so that the rubber band can be stably detached from the hook. During expansion, the connecting rod and tooth surface meshing transmission are used to achieve stable expansion.
This ensures the rubber band expands steadily and prevents it from detaching when the hook retracts, thus achieving accurate deployment of the rubber band.
Smart Images
Figure CN223736327U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to plastic bag packaging technical field especially relates to prevent falling rubber band expansion device. BACKGROUND
[0002] When plastic bag is packed, the plastic bag of certain thickness is folded, and the rubber band is set on the outside, which is convenient for subsequent packing after being fixed. The processing steps of the rubber band are as follows: the plastic bag is hooked out on the vibrating disc through the hook, and then is hung on the support rod of the expanded rubber band, and the rubber band is expanded by the support rod. The problem is that when the hook hangs out the rubber band from the vibrating disc, the position of the gathered support rod is generally lower than the position of the rubber band hung on the hook. When the hook retreats, the rubber band is easily attached to the hook and cannot fall off due to the friction of the hook and the position of the hook. The hook continues to retreat with the rubber band, and the uneven size and quality of the rubber band also make this situation more likely to occur.
[0003] When the hook is spaced apart from the gathered support rod and the rubber band is thrown onto the multiple support rods by the fast-forward hook, as described above, due to the difference in the quality and size of the rubber band, it is impossible to accurately throw all the rubber bands of different quality by uniform calibration, and the problem of unstable attachment of the rubber band to the support rod is also likely to occur. UTILITY MODEL CONTENT
[0004] The utility model provides a rubber band expansion device to solve the above technical problems. The expansion mechanism is divided into a pre-tensioning arm and an expansion arm, which are driven by different drive mechanisms. When the hook sends the rubber band to the position of the multiple support rods, the corresponding support rod of the pre-tensioning arm is located above the hook after the pre-tensioning arm is driven to open. The pre-tensioning arm drives the rubber band to the upper support rod on one side, so that the rubber band stably separates from the hook. When the hook retreats, the rubber band is not brought back by the hook.
[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a rack, a rubber band conveying mechanism, and an expansion mechanism are provided. The rubber band conveying mechanism is used to convey the rubber band to the expansion mechanism. The rubber band conveying mechanism includes an L-shaped hook for hanging and conveying the rubber band. The expansion mechanism includes a pre-tensioning arm and multiple expansion arms. The pre-tensioning arm and the expansion arm are installed on the same working surface of the rack to expand the rubber band. The pre-tensioning arm is rotatably installed on the working surface. A drive mechanism is arranged between the pre-tensioning arm and the rack to drive the pre-tensioning arm. The expansion arm is rotatably installed on the working surface. The pre-tensioning arm and the expansion arm are provided with support rods for opening the rubber band. When the multiple support rods are gathered, the L-shaped hook is higher than the support rods. When the support rods are expanded, the corresponding support rod of the pre-tensioning arm is located above the L-shaped hook.
[0006] Further optimize the technical scheme, the middle of the pre-tensioning arm is rotatably installed on the working surface, and the driving mechanism is a driving cylinder, and two ends of the driving cylinder are rotatably connected with one end of the pre-tensioning arm and the rack respectively.
[0007] Further optimize the technical scheme, the plurality of expansion arms are rotatably arranged on the working surface, the plurality of expansion arms comprise a first expansion arm, a second expansion arm and a third expansion arm, a driving cylinder is arranged between the first expansion arm and the rack, the second expansion arm and the first expansion arm are arranged through a connecting rod transmission, and the third expansion arm and the second expansion arm are arranged through a tooth surface meshing transmission.
[0008] Further optimize the technical scheme, after the supporting rod is expanded, the corresponding supporting rod of the first expansion arm and the second expansion arm is located at the lower side of the L-shaped hook, and the corresponding supporting rod of the third expansion arm is located at the upper side of the L-shaped hook.
[0009] Compared with the prior art, the utility model has the advantages that the expansion mechanism is divided into a pre-tensioning arm and an expansion arm, the structure is beneficial to ensure that the two are driven by different driving mechanisms, when the hook sends the rubber band to the position where the plurality of supporting rods are gathered, since the pre-tensioning arm is driven to be opened, the corresponding supporting rod is located at the upper side of the hook, the pre-tensioning arm drives the rubber band on one side to the supporting rod, so that the rubber band is stably separated from the hook, and further, when the hook is retracted, the retracted hook cannot take the rubber band back. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 The overall structure of the rubber band expansion device is shown in the figure.
[0011] Fig. 2 The structure of the pre-tensioning arm of the rubber band expansion device when it is opened is shown in the figure.
[0012] In the figure, 1 is a rack, 2 is a rubber band conveying mechanism, 3 is an L-shaped hook, 4 is a pre-tensioning arm, 5 is an expansion arm, 6 is a supporting rod, 7 is a driving mechanism, 8 is a working surface, 9 is a driving cylinder, 10 is a first expansion arm, 11 is a second expansion arm, 12 is a third expansion arm, 13 is a connecting rod, 14 is a tooth surface, and 15 is a vibrating disc. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0014] DETAILED DESCRIPTION: in combination with Figs. 1-2As shown, including rack 1, and the elastic band conveying mechanism 2 and expansion mechanism, the elastic band conveying mechanism 2 for conveying the elastic band to the expansion mechanism, the elastic band conveying mechanism 2 including for hanging elastic band and conveying L-shaped hook 3, the expansion mechanism including pre-tension arm 4 and a plurality of expansion arm 5, the pre-tension arm 4 and expansion arm 5 installed on the same working surface 8 of rack 1, for realizing the expansion of the elastic band, the pre-tension arm 4 is rotatably mounted on the working surface 8, the pre-tension arm 4 and the rack 1 between the setting of the drive mechanism 7 for driving the pre-tension arm 4 action, the expansion arm 5 is rotatably mounted on the working surface 8, the pre-tension arm 4 and the expansion arm 5 end are provided with a support rod 6 for opening the elastic band, a plurality of support rods 6 gather, the L-shaped hook 3 is higher than the support rod 6; when the support rod 6 expands, the corresponding support rod 6 of the pre-tension arm 4 is located on the upper side of the L-shaped hook 3; the pre-tension arm 4 is rotatably mounted in the middle of the working surface 8, the drive mechanism 7 is a drive cylinder, the drive cylinder 9 both ends are rotatably connected with one end of the pre-tension arm 4 and the rack 1; a plurality of the expansion arm 5 is rotatably provided on the working surface 8, a plurality of the expansion arm 5 includes first expansion arm 10, second expansion arm 11, third expansion arm 12, the first expansion arm 10 and the rack 1 between the setting of the drive cylinder 9, the second expansion arm 11 and the first expansion arm 10 through the connecting rod 13 transmission setting; the third expansion arm 12 and the second expansion arm 11 through the meshing transmission of the tooth surface 14; after the expansion of the support rod 6, the corresponding support rod 6 of the first expansion arm 10 and the second expansion arm 11 is located on the lower side of the L-shaped hook 3, the corresponding support rod 6 of the third expansion arm 12 is located on the upper side of the L-shaped hook 3.
[0015] In use, in combination Figs. 1-2 As shown, the L-shaped hook 3 will be hooked out of the gap of the vibrating disc 15 after the elastic band, transported to the location of the gathering of a plurality of support rods 6, a plurality of support rods 6 are located in the elastic band hung by the L-shaped hook 3, at this time, the L-shaped hook 3 is located on the upper side of a plurality of support rods 6, through the drive mechanism 7 drive pre-tension arm 4 action, so that the corresponding support rod 6 is turned up to open, the elastic band is turned up along one side to open, the elastic band is gradually separated from the L-shaped hook 3 in the opening process, so that the L-shaped hook 3 will not make the elastic band fall or drive the support rod 6 when it retreats, further through the cylinder action of driving the expansion arm 5, so that the first expansion arm 10 rotates, through the connecting rod 13 drive the second expansion arm 11 action, further through the tooth surface 14 drive the third expansion arm 12 action, so that although the expansion of the elastic band process is divided into two steps, but the expansion can be effectively expanded, avoid the problem of taking away the elastic band when the L-shaped hook 3 retreats, at the same time through the connecting rod 13 and the tooth surface 14 cooperation, realize a cylinder drive three expansion arm 5 action at the same time.
[0016] The control mode of the utility model is automatic control through the controller, the control circuit of the controller can be realized through simple programming of the technical personnel in the field, it is the public knowledge in the field, and the utility model is mainly used for protecting the mechanical setting, so the utility model will not explain the control mode and the circuit connection in detail.
[0017] It should be understood that the above specific embodiments of the utility model are only used for example explanation or interpretation of the principle of the utility model, and do not constitute the limitation of the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model shall be included in the protection scope of the utility model. In addition, the utility model attached claims are intended to cover all changes and modifications falling within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. A device for preventing elastic band from falling off, comprising a frame (1), an elastic band conveying mechanism (2) and an expanding mechanism, the elastic band conveying mechanism (2) is used for conveying the elastic band to the expanding mechanism, the elastic band conveying mechanism (2) comprises an L-shaped hook (3) for hanging and conveying the elastic band, characterized in that: The expansion mechanism comprises a pre-tensioning arm (4) and a plurality of expansion arms (5), the pre-tensioning arm (4) and the expansion arms (5) are installed on the same working surface (8) of the frame (1) and are used to expand the rubber band, the pre-tensioning arm (4) is rotatably installed on the working surface (8), a driving mechanism (7) is arranged between the pre-tensioning arm (4) and the frame (1) and is used to drive the pre-tensioning arm (4) to act, the expansion arms (5) are rotatably installed on the working surface (8), the pre-tensioning arm (4) and the expansion arms (5) are both provided with a support rod (6) for opening the rubber band, when the plurality of support rods (6) are gathered, the L-shaped hook (3) is arranged higher than the support rods (6); when the support rods (6) are expanded, the corresponding support rods (6) of the pre-tensioning arm (4) are located on the upper side of the L-shaped hook (3).
2. The anti-drop rubber band expansion device according to claim 1, wherein: The pre-tensioning arm (4) is rotatably installed at the middle of the working surface (8), the driving mechanism (7) is a driving cylinder, and the driving cylinder (9) is rotatably connected with one end of the pre-tensioning arm (4) and the frame (1) respectively.
3. The anti-drop rubber band expansion device according to claim 1, wherein: The plurality of expansion arms (5) are rotatably arranged on the working surface (8), the plurality of expansion arms (5) comprise a first expansion arm (10), a second expansion arm (11) and a third expansion arm (12), a driving cylinder (9) is arranged between the first expansion arm (10) and the frame (1), the second expansion arm (11) and the first expansion arm (10) are drivingly arranged through a connecting rod (13); the third expansion arm (12) and the second expansion arm (11) are drivingly engaged through a tooth surface (14).
4. The anti-drop rubber band expansion device according to claim 3, wherein: After the support rods (6) are expanded, the corresponding support rods (6) of the first expansion arm (10) and the second expansion arm (11) are located on the lower side of the L-shaped hook (3), and the corresponding support rods (6) of the third expansion arm (12) are located on the upper side of the L-shaped hook (3).