Automatic clamping device for wrapping machine transparent paper

Abstract

This utility model belongs to the field of tobacco packaging technology and discloses an automatic clamping device for transparent paper in a packaging machine. It includes a first bracket and a second bracket. A support shaft is elastically mounted on the first bracket, and an abutment shaft coaxially mounted on the second bracket. It also includes a connecting plate and a motor. The connecting plate is connected to the abutment shaft. A guide member penetrating the other is provided on one of the connecting plate and the second bracket. The motor is mounted on the second bracket, and a lead screw is coaxially mounted on its output end. The lead screw is threadedly connected to the connecting plate. The motor is configured to drive the abutment shaft to reciprocate along its axial direction to cooperate with the support shaft in clamping the transparent paper roll. By replacing the existing cylinder with a motor, the automatic clamping device for transparent paper in the packaging machine locks the clamping force of the transparent paper roll through a self-locking function when the gas or power is interrupted at the end of the workday. Even during a power outage, it always provides clamping force to the transparent paper roll, preventing it from falling to the ground.

Description

Technical Field

[0001] This utility model relates to the field of tobacco packaging technology, and in particular to an automatic clamping device for transparent paper in a packaging machine. Background Technology

[0002] After cigarette packs are packaged into cartons, a layer of transparent paper is usually wrapped on the surface of the carton using a packaging machine to protect and enhance the appearance of the outer packaging.

[0003] In related technologies, the substrate of transparent paper is a transparent paper roll, and the transparent paper roll clamping device of the packaging machine includes a first bracket and a second bracket that are arranged opposite to each other and spaced apart. A support shaft is elastically arranged on the first bracket, and an abutment shaft is arranged on the second bracket coaxially with the support shaft. The transparent paper roll is arranged between the support shaft and the abutment shaft. The second bracket is also provided with a cylinder that pushes the abutment shaft toward the support shaft to clamp the transparent paper roll in the paper feeding mechanism.

[0004] Because the clamping force of the aforementioned clamping device is controlled by a cylinder, when the gas or power is cut off at the end of the workday, the cylinder loses pressure and becomes unable to clamp the transparent paper roll, causing it to fall to the ground intermittently. If the broken transparent paper is discovered after falling to the ground, it needs to be manually cut off, resulting in a significant loss of raw materials; if the broken transparent paper is not discovered after falling to the ground, it can easily lead to quality problems.

[0005] Therefore, there is an urgent need to design a new automatic clamping device for the transparent paper of packaging machines to improve the above-mentioned problems. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic clamping device for transparent paper in a packaging machine, so as to solve the technical problem that the cylinder loses pressure and is unable to clamp the transparent paper roll, causing the transparent paper roll to fall to the ground intermittently.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The automatic clamping device for transparent paper in a packaging machine provided by this utility model includes a first bracket and a second bracket arranged opposite to and spaced apart from each other. A support shaft is elastically provided on the first bracket, and an abutment shaft coaxially arranged with the support shaft is provided on the second bracket. The device also includes:

[0009] A connecting plate, which is connected to the abutment shaft, and a guide piece penetrating the other is provided on one of the connecting plate and the second bracket;

[0010] The motor is mounted on the second bracket and has a lead screw coaxially mounted on its output end. The lead screw is threadedly connected to the connecting plate. The motor is configured to drive the abutment shaft to reciprocate along its axial direction in order to cooperate with the support shaft to clamp the transparent paper roll.

[0011] The motor is started, and its forward or reverse rotation drives the lead screw to rotate synchronously. The connecting plate, threaded with the lead screw, moves axially along the guide member, causing the abutment shaft connected to the connecting plate to move towards or away from the support shaft. This adjusts the clamping force between the support shaft and the abutment shaft on the transparent paper roll. In case of power or gas outages during get off work hours, the motor's self-locking function locks the clamping force on the transparent paper roll, ensuring continuous clamping force even during power outages. This prevents the transparent paper roll from falling to the ground, reduces raw material waste, and avoids the potential quality hazard of the transparent paper tearing.

[0012] It should be noted that motor power-off self-locking is existing technology, and common implementation methods include: installing an electromagnetic braking system or holding brake, by installing an electromagnetic braking device at the motor drive end, which releases the lock when power is applied and automatically locks it when power is cut off. Alternatively, a controller can be installed, and the motor controller supports power-off self-locking function, maintaining the locked position through a small current, such as a stepper motor. Alternatively, a dedicated power-off locking device (such as a relay or contactor) can be installed to lock the motor position when power is cut off. Since the above self-locking methods are all existing technologies, their specific structures and principles will not be further detailed in this embodiment.

[0013] As a preferred embodiment of the automatic clamping device for the transparent paper of the packaging machine, the motor is a stepper motor.

[0014] The stepper motor in this embodiment has a built-in self-locking function, which is achieved by adding a small current to the control signal.

[0015] As a preferred embodiment of the automatic clamping device for transparent paper in a packaging machine, a ball wheel is threaded around the lead screw, a connecting plate passes through the lead screw, and the ball wheel is connected to the connecting plate.

[0016] The ball wheel is threaded with the lead screw, and the connecting plate is connected to the lead screw via the ball wheel. The connection between the connecting plate and the ball wheel is made by bolts, which facilitates disassembly and assembly.

[0017] As a preferred embodiment of the automatic clamping device for the transparent paper of a packaging machine, the guide includes:

[0018] A guide rod, the axis of which is parallel to the axis of the lead screw, one end of which is disposed on the connecting plate and the other end of which passes through the second bracket.

[0019] The guide rod converts the rotational motion of the lead screw and connecting plate into linear motion, thus guiding the movement of the connecting plate.

[0020] As a preferred embodiment of the automatic clamping device for the transparent paper of a packaging machine, the guide rod is provided with multiple rods.

[0021] Multiple guide rods offer greater stability and adjustment precision, facilitating fine-tuning.

[0022] As a preferred embodiment of the automatic clamping device for the transparent paper of the packaging machine, the connecting plate is located on the side of the second bracket away from the first bracket.

[0023] The connecting plate and motor are located on the outside of the first bracket, which is convenient for operators to inspect and maintain, and does not occupy the space for placing the transparent paper roll, making the layout more reasonable.

[0024] As a preferred embodiment of the automatic clamping device for transparent paper in a packaging machine, the connecting plate has an abutment groove on one side that matches the abutment shaft, a limit ring is provided on the outer periphery of the abutment shaft, a fastening screw is threaded to the end of the abutment shaft, the end face of the connecting plate abuts against the limit ring, and the head of the fastening screw is movably pressed against the other end face of the connecting plate.

[0025] The connecting plate's abutting groove abuts against the outer circumference of the abutting shaft. The fastening screw is screwed onto the abutting shaft until the head of the fastening screw and the limiting ring clamp the connecting plate between them, so that the movement of the connecting plate can drive the abutting shaft to move synchronously. The structure is simple and easy to manufacture.

[0026] As a preferred embodiment of the automatic clamping device for the transparent paper of the packaging machine, the head of the fastening screw is provided with a toothed structure on the outer periphery.

[0027] The toothed structure on the outer periphery of the screw head allows the operator to easily adjust the clamping force of the screw by hand, and also facilitates installation and removal.

[0028] As a preferred embodiment of the automatic clamping device for the transparent paper of the packaging machine, the abutment shaft is keyed to the second bracket.

[0029] A key block is provided on the circumference of the abutment shaft along its axial direction. A keyway is provided in the second bracket to fit the key block. The key block and the keyway are matched to achieve the key connection between the abutment shaft and the second bracket, thereby limiting the relative rotation between the two and ensuring good stability.

[0030] As a preferred embodiment of the automatic clamping device for the transparent paper of the packaging machine, the end of the abutment shaft facing the support shaft is tapered.

[0031] The tapered abutment shaft end can accommodate transparent paper rolls with different inner diameters, making it more versatile.

[0032] The beneficial effects of this utility model are:

[0033] The motor is started, and its forward or reverse rotation drives the lead screw to rotate synchronously. The connecting plate, threaded with the lead screw, moves axially along the guide member, causing the abutment shaft connected to the connecting plate to move towards or away from the support shaft. This adjusts the clamping force between the support shaft and the abutment shaft on the transparent paper roll. In case of power or gas outages during get off work hours, the motor's self-locking function locks the clamping force on the transparent paper roll, ensuring continuous clamping force even during power outages. This prevents the transparent paper roll from falling to the ground, reduces raw material waste, and avoids the potential quality hazard of the transparent paper tearing. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the automatic clamping device provided in this embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the motor provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 1. First support;

[0038] 2. Second bracket; 21. Abutment shaft; 211. Limiting ring; 212. Fastening screw;

[0039] 3. Connecting plate; 31. Abutment groove;

[0040] 4. Guide rod;

[0041] 5. Motor; 51. Lead screw; 52. Ball wheel. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] In related technologies, the substrate of transparent paper is a transparent paper roll, and the transparent paper clamping device of the packaging machine includes a first bracket and a second bracket that are arranged opposite to each other and spaced apart. A support shaft is elastically arranged on the first bracket, and an abutment shaft is arranged on the second bracket coaxially with the support shaft. The transparent paper roll is arranged between the support shaft and the abutment shaft. The second bracket is also provided with a cylinder that pushes the abutment shaft toward the support shaft to clamp the transparent paper roll in the paper feeding mechanism.

[0047] Because the clamping force of the aforementioned clamping device is controlled by a cylinder, when the gas or power is cut off at the end of the workday, the cylinder loses pressure and becomes unable to clamp the transparent paper roll, causing it to fall to the ground intermittently. If the broken transparent paper is discovered after falling to the ground, it needs to be manually cut off, resulting in a significant loss of raw materials; if the broken transparent paper is not discovered after falling to the ground, it can easily lead to quality problems.

[0048] To solve the above problems, combined with Figure 1 and Figure 2 As shown, the automatic clamping device for transparent paper of the packaging machine provided in this embodiment includes, in addition to the first bracket 1, the second bracket 2, the support shaft elastically disposed on the first bracket 1, and the abutment shaft 21 disposed on the second bracket 2 and coaxially disposed with the support shaft, a connecting plate 3 and a motor 5. The connecting plate 3 is connected to the abutment shaft 21. A guide member penetrating the other is provided on one of the connecting plate 3 and the second bracket 2. The motor 5 is disposed on the second bracket 2 and a lead screw 51 is coaxially disposed on its output end. The lead screw 51 is threadedly connected to the connecting plate 3. The motor 5 is configured to drive the abutment shaft 21 to reciprocate along its axial direction to cooperate with the support shaft to clamp the transparent paper roll.

[0049] The motor 5 is started, and its forward or reverse rotation drives the lead screw 51 to rotate synchronously. The connecting plate 3, threadedly engaged with the lead screw 51, moves axially along the guide under the constraint of the guide member. This causes the abutment shaft 21, connected to the connecting plate 3, to move towards or away from the support shaft, thereby adjusting the clamping force between the support shaft and the abutment shaft 21 on the transparent paper roll. When there is a gas or power outage at the end of the workday, the motor 5, after power failure, locks the clamping force on the transparent paper roll through its self-locking function. Even during a power outage, it continues to provide clamping force to the transparent paper roll, preventing it from falling to the ground, reducing raw material waste, and avoiding the potential quality hazard of the transparent paper tearing.

[0050] It should be noted that the self-locking mechanism of motor 5 in the event of a power outage is existing technology, and common implementation methods include:

[0051] ① Install an electromagnetic braking system or holding brake. By installing an electromagnetic braking device at the drive end of motor 5, the device can be unlocked when power is applied and automatically locked when power is cut off.

[0052] ② Install a controller. The motor controller supports a power-off self-locking function, which maintains the locked position through a small current, for example, a stepper motor.

[0053] ③ Install a dedicated power-off locking device (such as a relay or contactor) to lock the motor in position 5 when power is off, etc. Since the above self-locking methods are all existing technologies, their specific structures and principles will not be further detailed in this embodiment.

[0054] Preferably, the motor 5 in this embodiment is a stepper motor, and the stepper motor in this embodiment has a built-in self-locking function, which is specifically achieved by adding a small current to the control signal.

[0055] Specifically, such as Figure 1 As shown, a keyed connection is established between the abutment shaft 21 and the second bracket 2. More specifically, a key block is provided on the circumference of the abutment shaft 21 extending along its axial direction, and a keyway is provided in the second bracket 2 to accommodate the key block. The keyed connection between the abutment shaft 21 and the second bracket 2 is achieved through the cooperation of the key block and the keyway, thereby limiting the relative rotation between the two and ensuring good stability.

[0056] Furthermore, the end of the abutment shaft 21 facing the support shaft is tapered. The tapered end of the abutment shaft 21 can accommodate transparent paper rolls with different inner diameters, thus improving its versatility.

[0057] See also Figure 1 The connecting plate 3 is located on the side of the second bracket 2 away from the first bracket 1. The connecting plate 3 and the motor 5 and other structures are all located on the outside of the first bracket 1, which facilitates the operation and maintenance of the operator, and does not occupy the space for the transparent paper roll, making the layout more reasonable.

[0058] A connecting plate 3 has an abutment groove 31 on one side that matches the abutment shaft 21. A limit ring 211 is provided on the outer periphery of the abutment shaft 21. A fastening screw 212 is threadedly connected to the end of the abutment shaft 21. The end face of the connecting plate 3 abuts against the limit ring 211, and the head of the fastening screw 212 is movably pressed against the other end face of the connecting plate 3. The abutment groove 31 of the connecting plate 3 abuts against the outer periphery of the abutment shaft 21. The fastening screw 212 is screwed onto the abutment shaft 21 until the head of the fastening screw 212 and the limit ring 211 clamp the connecting plate 3 between them, so that the movement of the connecting plate 3 can drive the abutment shaft 21 to move synchronously. The structure is simple and easy to manufacture.

[0059] The head of the fastening screw 212 has a toothed structure on its outer periphery. This toothed structure allows the operator to easily adjust the clamping force of the fastening screw 212 by hand, and also facilitates installation and removal.

[0060] The guide component in this embodiment includes a guide rod 4, the axis of which is parallel to the axis of the lead screw 51. One end of the guide rod 4 is mounted on the connecting plate 3, and the other end passes through the second bracket 2. The guide rod 4 converts the rotational motion of the lead screw 51 and the connecting plate 3 into linear motion, thus guiding the movement of the connecting plate 3. Multiple guide rods 4 are provided; multiple guide rods 4 offer higher stability and adjustment precision, facilitating fine-tuning.

[0061] Preferably, in this embodiment, two guide rods 4 are provided, and the two guide rods 4 are respectively located at the two corners of the connecting plate 3. In other embodiments, one, three, four or even more guide rods 4 can be provided. The specific number of guide rods 4 can be set according to the requirements, and this embodiment does not make a specific limitation on this.

[0062] Specifically, such as Figure 2 As shown, a ball wheel 52 is threadedly connected to the circumference of the lead screw 51 of the motor 5. A connecting plate 3 passes through the lead screw 51, and the ball wheel 52 is connected to the connecting plate 3. The ball wheel 52 is threadedly engaged with the lead screw 51, and the connecting plate 3 is threadedly connected to the lead screw 51 through the ball wheel 52. Specifically, the ball wheel 52 includes a bushing and a limiting plate. The bushing is threadedly fitted onto the outer circumference of the lead screw 51, and the limiting plate is an oblong shape, fixedly fitted onto the outer circumference of the bushing. The connecting plate 3 has a limiting groove that fits into the limiting plate. The connection between the connecting plate 3 and the ball wheel 52 is achieved through the insertion and engagement of the limiting groove and the limiting plate, which facilitates disassembly and assembly. In other embodiments, the shape of the limiting plate can also be elliptical, rectangular, etc., which is not specifically limited in this embodiment.

[0063] In some embodiments, the connection between the connecting plate 3 and the ball wheel 52 is made by bolts, which makes the connection more secure, less likely to loosen, and more reliable.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automatic clamping device for transparent paper in a packaging machine, comprising a first bracket (1) and a second bracket (2) arranged opposite to and spaced apart, wherein a support shaft is elastically provided on the first bracket (1), and an abutment shaft (21) coaxially provided on the second bracket (2), characterized in that, Also includes: A connecting plate (3) is connected to the abutting shaft (21), and a guide piece penetrating the other is provided on one of the connecting plate (3) and the second bracket (2); The motor (5) is mounted on the second bracket (2) and its output end is coaxially provided with a lead screw (51). The lead screw (51) is threadedly connected to the connecting plate (3). The motor (5) is configured to drive the abutment shaft (21) to reciprocate along its axial direction in order to cooperate with the support shaft to clamp the transparent paper roll.

2. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The motor (5) is a stepper motor.

3. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The lead screw (51) is threaded with a ball wheel (52) on its periphery, the connecting plate (3) passes through the lead screw (51), and the ball wheel (52) is connected to the connecting plate (3).

4. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The guide component includes: Guide rod (4), the axial direction of the guide rod (4) is parallel to the axial direction of the lead screw (51), one end of the guide rod (4) is disposed on the connecting plate (3), and the other end passes through the second bracket (2).

5. The automatic clamping device for wrapping machine transparent paper according to claim 4, characterized in that, The guide rod (4) is provided in multiple parts.

6. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The connecting plate (3) is located on the side of the second bracket (2) away from the first bracket (1).

7. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The connecting plate (3) has an abutment groove (31) on one side that matches the abutment shaft (21). The abutment shaft (21) has a limit ring (211) on its outer periphery. The end of the abutment shaft (21) is threaded with a fastening screw (212). The end face of the connecting plate (3) abuts against the limit ring (211). The head of the fastening screw (212) is movably pressed against the other end face of the connecting plate (3).

8. The automatic clamping device for wrapping machine transparent paper according to claim 7, characterized in that, The head of the fastening screw (212) has a toothed structure on its outer periphery.

9. The automatic clamping device for wrapping machine transparent paper according to claim 1, characterized in that, The abutment shaft (21) is keyed to the second bracket (2).

10. The automatic clamping device for the transparent paper of the packaging machine according to claim 9, characterized in that, The abutment shaft (21) is tapered toward the end of the support shaft.

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