Rotary labeling mechanism

Abstract

The invention provides a rotary labeling mechanism. The rotary labeling mechanism comprises a middle column and a pushing wheel. The middle column is arranged along the vertical direction and is provided with a bottom end part, a setting groove and a driven wheel; the setting groove is recessed in the outer peripheral surface of the center pillar and is located at the bottom end portion. The driven wheel is rotatably arranged in the arrangement groove, and a rotating shaft of the driven wheel inclines relative to the axial direction of the middle column. The pushing wheel is arranged beside the driven wheel and located outside the arrangement groove, a rotating shaft of the pushing wheel is parallel to a rotating shaft of the driven wheel, and the pushing wheel rotates towards the lower portion of the middle column. When the pushing wheel rotates, downward momentum and momentum along the tangent line of the cross section of the middle column are generated, so that the label conveyed by the pushing wheel rotates synchronously when being ejected downwards to maintain a cylindrical shape and reduce wrinkles or cracks, the influence of lateral airflow or container surface friction can be resisted, offset is reduced, and the label sleeving yield is improved.

Description

Technical Field

[0001] The present invention relates to a label sleeving mechanism, and particularly to a mechanism for sleeving a plastic label film on containers such as bottles and cans. Background Art

[0002] In the production line of liquid products, bottles and cans are mostly used as containers for holding liquid products, such as plastic bottles or glass bottles. In order to label the product content in the container, a label is provided on the outer side of the container. Generally speaking, labels can be roughly divided into sticker types and film sleeving types according to the setting method. Among them, film sleeving type labels are commonly seen in various plastic bottle beverages. Film sleeving type labels are often made of plastic. In the sleeving process, the label is first stretched into a cylindrical shape, cut to an appropriate length, and then sleeved on the container. Finally, the label is heated to shrink and tightly sleeve the plastic bottle, thus completing the action of sleeving the label.

[0003] In a large-scale automated production line, the process of sleeving labels can also be automatically performed by a machine. When a traditional label sleeving mechanism sleeves a label, the container is transported to the label sleeving mechanism via a conveyor belt, and the label sleeving mechanism vertically shoots the cylindrical label from top to bottom so that the label is sleeved on the container. However, since the film sleeving type label is made of plastic, it is very light and very thin, and in addition, it has a certain windward area after being stretched. Therefore, when the label is shot out by the machine, it is easily affected by lateral air flow or the frictional force on the container surface, and cannot continuously maintain a cylindrical shape, resulting in wrinkles or cracks when being sleeved on the container, so that defects occur, or even the label cannot be successfully sleeved on the container. This will increase the defective rate of the product and cause losses of labels, or waste the energy of the machine, not only increasing the production cost but also being very environmentally unfriendly.

[0004] Therefore, the traditional label sleeving mechanism really needs to be improved. Summary of the Invention

[0005] The main object of the present invention is to provide a rotary label sleeving mechanism, which can keep the ejected label in a cylindrical shape for sleeving on a container, so as to solve the problems of the traditional label sleeving mechanism in the prior art.

[0006] To achieve the above object, the rotary label sleeving mechanism proposed by the present invention includes:

[0007] A middle column, which is arranged in the up and down direction and has a bottom end portion. The middle column has:

[0008] A setting groove, which is recessed on the outer peripheral surface of the middle column and is located at the bottom end portion; and

[0009] A driven wheel, which is rotatably arranged in the setting groove, and the rotation axis of the driven wheel is inclined with respect to the axial direction of the middle column; and

[0010] A pushing wheel is arranged beside the driven wheel and outside the setting groove. The rotating shaft of the pushing wheel is parallel to that of the driven wheel, and the pushing wheel rotates towards the lower direction of the middle column.

[0011] In the rotating label sleeving mechanism as described above, the outermost end of the driven wheel in the radial direction of the middle column and the outer peripheral surface of the middle column are located on the same circumferential surface.

[0012] In the rotating label sleeving mechanism as described above, the driven wheel has a central part and two end parts along the direction of its rotating shaft. The central part is located between the two end parts, and the outer diameter of the driven wheel gradually shrinks from the central part to the two end parts respectively.

[0013] In the rotating label sleeving mechanism as described above, the included angle between the rotating shaft of the driven wheel and the axial direction of the middle column is 45 degrees.

[0014] In the rotating label sleeving mechanism as described above, it further has a servo motor which is connected to the pushing wheel.

[0015] In the rotating label sleeving mechanism as described above, it further has a transmission component. The pushing wheel is connected to the transmission component; and a driving motor, whose power is connected to the transmission component, whereby the driving motor drives the pushing wheel.

[0016] In the rotating label sleeving mechanism as described above, the transmission component further includes a plurality of pulley groups which are connected in series with each other.

[0017] In the rotating label sleeving mechanism as described above, it further includes a connecting arm. The pushing wheel is rotatably arranged at one end of the connecting arm; and a slide rail which is arranged along the radial direction of the middle column, and the other end of the connecting arm is movably arranged on the slide rail.

[0018] In the rotating label sleeving mechanism as described above, the material of the driven wheel includes polyethylene, ultra-high molecular weight polyethylene, or polyoxymethylene.

[0019] Therefore, the advantages of the present invention are as follows. Since the rotating shafts of the pushing wheel and the driven wheel are inclined relative to the axial direction of the middle column, when the pushing wheel and the driven wheel rotate to eject the label, there is momentum in the downward and tangential directions, so that the label rotates while being ejected downward. By using the centrifugal force generated by the rotation, the label is maintained in a circular shape and the deformation is reduced, so as to reduce the probability of wrinkles or cracks; in addition, it can also rely on the inertia of rotation to resist the lateral air flow or reduce the influence of the friction force on the container surface, reduce the deviation of the label during the ejection process, and improve the yield of label sleeving. Description of the Drawings

[0020] Figure 1 It is a three-dimensional external view schematic diagram of the present invention.

[0021] Figure 2 Schematic diagram of the three-dimensional decomposition of the present invention.

[0022] Figure 3 Partial enlarged schematic diagram of the present invention, which shows that the pushing wheel is arranged beside the driven wheel.

[0023] Figure 4 Stereoscopic perspective schematic diagram of the bottom end of the middle column of the present invention.

[0024] Figure 5 External view schematic diagram of the driven wheel of the present invention.

[0025] Figure 6 Side view schematic diagram of the bottom end of the middle column of the present invention.

[0026] Figure 7 is Figure 6 Partial sectional view schematic diagram along the A-A cutting plane line in

[0027] Figure 8 Front view schematic diagram of the present invention without the middle column.

[0028] Figure 9 Top view schematic diagram of the present invention without the middle column.

[0029] Figure 10 Side view schematic diagram of the present invention without the middle column.

[0030] Figure 11 Usage schematic diagram of the present invention. Detailed implementation manners

[0031] First, please refer to Figure 1 and Figure 2 , the present invention provides a rotary labeling mechanism, which includes a middle column 10, two pushing wheels 20, an adjustment component 30, a driving motor 40, and a transmission component 50.

[0032] Next, please refer to Figures 2 to 4 , the middle column 10 is arranged in the up and down direction and has a top end 11 and a bottom end 12 that are opposite to each other. The top end 11 is flat, and the rest is cylindrical. In this embodiment, the middle column 10 has two setting grooves 13 and two driven wheels 14. The two setting grooves 13 are recessed on the outer peripheral surface of the bottom end 12 of the middle column 10, and the two setting grooves 13 are respectively located on opposite sides of the middle column 10 in the radial direction, but not limited thereto. The number of the driven wheels 14 and the setting grooves 13 can be adjusted according to requirements.

[0033] Next, please refer to Figures 3 to 7 , the two driven wheels 14 are respectively arranged in the setting grooves 13, as shown in Figure 4 and Figure 6As shown, the extension line of the axis M of each driven wheel 14 is inclined with respect to the extension line of the axial direction L of the middle column 10. Specifically, it is inclined with respect to the axial direction L of the middle column 10 along the tangent direction of the cross-section of the middle column 10. In this embodiment, the angle I between the axis M of each driven wheel 14 and the axial direction L of the middle column 10 is 45 degrees, but it is not limited thereto. The angle I between the axis M of the driven wheel 14 and the axial direction L of the middle column 10 can be adjusted according to requirements.

[0034] In this embodiment, as Figure 4 and Figure 7 shown, the outermost ends of each driven wheel 14 in the radial direction of the middle column 10 are located on the same circumferential surface as the outer peripheral surface of the middle column 10, but it is not limited thereto. The driven wheel 14 can protrude slightly from the outer peripheral surface of the middle column 10.

[0035] Specifically, as Figure 5 shown, the driven wheel 14 has a central portion 141 and two end portions 142 along its own axis direction. The central portion 141 is located between the two end portions 142, and the outer diameter of the driven wheel 14 gradually decreases from the central portion 141 towards the two end portions 142. In other words, the driven wheel 14 forms a shape similar to a spindle. Accordingly, an inscribed relationship in the space as Figure 7 shown can be formed between the outer peripheral surface of the central portion 141 of the driven wheel 14 and the outer peripheral surface of the middle column 10, so that the outer peripheral surface of the driven wheel 14 can conform and will not protrude from the outer peripheral surface of the middle column 10, but it is not limited thereto. The setting method and shape of the driven wheel 14 can be adjusted according to requirements.

[0036] In addition, the material of the driven wheel 14 can include polyethylene (PE), ultra-high molecular weight polyethylene (UPE), or polyoxymethylene (POM), thereby achieving the effects of wear resistance, light weight, low inertia and easy stopping, but it is not limited thereto. The material of the driven wheel 14 can be adjusted according to requirements.

[0037] Next, please refer to Figures 1 to 3 , two pushing wheels 20 are arranged beside the driven wheels 14 and outside the setting groove 13. The axes of the two pushing wheels 20 are respectively parallel to the axes of the corresponding driven wheels 14, and each pushing wheel 20 rotates downward towards the middle column 10. In this embodiment, the outer peripheral surface of the pushing wheel 20 contacts the outer peripheral surface of the driven wheel 14. Thus, when the pushing wheel 20 rotates, it can drive the driven wheel 14 to rotate, but it is not limited thereto. For example, in other embodiments, the pushing wheel 20 and the driven wheel 14 can be slightly separated.

[0038] Next, please refer to Figure 1 ,Figure 2 and Figures 8 to 10 The adjusting assembly 30 has two connecting arms 31 and a slide rail 32. The two pushing wheels 20 are respectively rotatably arranged on the two connecting arms 31. The slide rail 32 is located beside the bottom end 12 of the middle column 10, and the slide rail 32 is arranged along the radial direction of the middle column 10. The other end of the connecting arm 31 is movably arranged on the slide rail 32. Specifically, the connecting arm 31 can move along the slide rail 32 to adjust the distance between the pushing wheel 20 and the middle column 10, but not limited thereto. In other embodiments, the adjusting assembly 30 may not be provided, or the adjusting assembly 30 may be in other forms.

[0039] The driving motor 40 is connected to the transmission assembly 50, and the two pushing wheels 20 are connected to the transmission assembly 50. Thus, the driving motor 40 can drive the pushing wheels 20 to rotate. The transmission assembly 50 includes a plurality of pulley sets 51. By the ratio of the inner diameters of the rotating wheels in each pulley set 51, the torque of the pushing wheels 20 can be increased. The pulley sets 51 are connected in series with each other to transmit momentum. Specifically, in this embodiment, the pulley sets 51 are connected in series with each other to form a linkage mechanism, so that the movement of the connecting arm 31 can be corresponded to without affecting the transmission of momentum.

[0040] In this embodiment, the pushing wheel 20 is indirectly connected to the transmission assembly 50 through the connecting arm 31 of the adjusting assembly 30. Specifically, the connecting arm 31 may have a bevel gear set (not shown in the figure) and a transmission rod (not shown in the figure) therein. The bevel gear set and the transmission rod are connected to each other. The pushing wheel 20 is connected to the bevel gear set, and the transmission rod is connected to the transmission assembly 50. Thus, the transmission assembly 50 can transmit momentum to the pushing wheel 20 through the connecting arm 31. This is the application of existing transmission elements, so it will not be elaborated, but not limited thereto.

[0041] In addition, in other embodiments, the driving motor 40 and the transmission assembly 50 may not be provided, and the two pushing wheels 20 are respectively connected to a servo motor (not shown in the figure) and directly driven by the servo motor. In this way, since the transmission assembly 50 is not required, the overall volume can be reduced, which is suitable for use in factories with limited space or compact equipment.

[0042] Please refer to Figure 11 , when using the label of the present invention, the container B to be labeled is located under the middle column 10. The label C is opened into a cylindrical shape by the middle column 10 and falls along the middle column 10 to the bottom end 12. Then, the opposite side surfaces of the label C are respectively clamped by the pushing wheel 20 and the driven wheel 14, and the pushing wheel 20 and the driven wheel 14 rotate synchronously to shoot the label C downward together.

[0043] Since the axes of rotation of the pushing wheel 20 and the driven wheel 14 are inclined with respect to the axial direction of the middle column 10, when the pushing wheel 20 rotates, in addition to generating a downward momentum, a momentum in the tangential direction of the cross-section of the middle column 10 is also generated, causing the label C to rotate synchronously while being ejected downward. The centrifugal force generated by the rotation enables the label C to maintain a cylindrical shape (appearing circular when viewed from the cross-section) during the movement, thus reducing deformation to lower the probability of wrinkles or cracks; in addition, the inertia of rotation can also resist the influence of lateral air flow or the surface friction of the container B, reducing the deviation of the label C during ejection, improving the yield of label sleeving, reducing the generation of discarded labels C, and promoting environmental protection.

[0044] In addition, if the driven wheel 14 uses a general cylindrical roller or bearing, it may protrude from the circumferential surface of the middle column 10, resulting in the label C getting stuck or moving smoothly when it falls; in the present invention, the driven wheel 14 is designed to be approximately spindle-shaped, so that the outer peripheral surface of the driven wheel 14 can conform to the outer peripheral surface of the middle column 10 and will not protrude from the outer peripheral surface of the middle column 10. Therefore, the rotary label sleeving mechanism of the present invention will not have the problem that the aforementioned label C may be affected by the protruding driven wheel 14 and cause problems such as difficult falling or getting stuck.

[0045] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A rotary label sleeving mechanism, characterized in that, Comprising: A central column, which is arranged in the vertical direction and has a bottom end. The central column has: A setting groove, which is recessed on the outer peripheral surface of the central column and is located at the bottom end; and A driven wheel, which is rotatably arranged in the setting groove, and the axis of the driven wheel is inclined with respect to the axial direction of the central column; and A pushing wheel, which is arranged beside the driven wheel and outside the setting groove. The axis of the pushing wheel is parallel to the axis of the driven wheel, and the pushing wheel rotates toward the lower direction of the central column.

2. The rotary label sleeving mechanism according to claim 1, wherein The outermost end of the driven wheel in the radial direction of the central column is located on the same circumferential surface as the outer peripheral surface of the central column.

3. The rotary label sleeving mechanism according to claim 2, wherein The driven wheel has a central part and two end parts along the direction of its axis. The central part is located between the two end parts, and the outer diameter of the driven wheel gradually decreases from the central part to the two end parts.

4. The rotary label sleeving mechanism according to claim 1, wherein The included angle between the axis of the driven wheel and the axial direction of the central column is 45 degrees.

5. The rotary label sleeving mechanism according to any one of claims 1 to 4, characterized in that, It further has: A servo motor, which is connected to the pushing wheel.

6. The rotary label sleeving mechanism according to any one of claims 1 to 4, characterized in that, It further has: A transmission assembly, the pushing wheel is connected to the transmission assembly; and A driving motor, which is connected to the transmission assembly, whereby the driving motor drives the pushing wheel.

7. The rotary label sleeving mechanism according to claim 6, characterized in that, The transmission assembly further includes: A plurality of pulley groups, which are connected in series with each other.

8. The rotary label sleeving mechanism according to any one of claims 1 to 4, characterized in that, It further includes: A connecting arm, the pushing wheel is rotatably arranged at one end of the connecting arm; and A slide rail, which is arranged in the radial direction of the central column, and the other end of the connecting arm is movably arranged on the slide rail.

9. The rotary label sleeving mechanism according to any one of claims 1 to 4, characterized in that, The material of the driven wheel includes polyethylene, ultra-high molecular weight polyethylene, or polyoxymethylene.

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