Tension-adjustable rotating rod mechanism of rotating rod labeling machine

Abstract

The invention relates to a tension-adjustable rotating rod mechanism of a rotating rod labeling machine in the technical field of vaccine packaging. The tension-adjustable rotating rod mechanism comprises a synchronous belt, an elastic tensioning structure, a tension and pressure sensor, a fan-shaped plate adjusting wheel, a power assembly, a fan-shaped plate, a driving wheel and a driven wheel, the synchronous belt is wound on the driving wheel, the driven wheel and the fan-shaped plate adjusting wheel; the power assembly is connected with the first end of the elastic tensioning structure, the second end of the elastic tensioning structure is fixed to the sector plate, the sector plate is fixed through the sector plate adjusting wheel, and the tension and pressure sensor is fixed to the joint of the elastic tensioning structure and the power assembly. The tensioning degree of the synchronous belt can be adjusted in real time, so that the torsion of the injector during assembly is changed, and it is ensured that assembly is not affected by factors such as abrasion or fatigue of the synchronous belt, and meanwhile, the assembly efficiency is improved by adjusting the tensioning degree of the synchronous belt. The synchronous belt and the glass outer surface of the injector can form an over-rotation slipping effect, and it can be effectively guaranteed that assembly is not over-rotated.

Description

Technical Field

[0001] The invention relates to the technical field of vaccine packaging, and in particular to a rotary rod mechanism of a rotary rod labeling machine with adjustable tension. Background Art

[0002] An injection is a pharmaceutical preparation that has an injection solution pre-loaded into a syringe. When it is used, the packaging can be directly removed, and the syringe can be taken out for injection. One of the production links of an injection is to send a syringe pre-loaded with an injection solution but without a push rod and a push rod to a place through a conveying device, and then put the push rod into the syringe. Then, the push rod is installed into the syringe by a combination of rotation and pressure through a device that twists the push rod. Vaccine packaging is in this form.

[0003] In the current disposable vaccine syringe packaging production line, due to the strict requirements for the packaging of disposable syringes, if the torque is too large, the packaging will be over-rotated and the syringe will be scrapped and unusable. However, each production batch of vaccine packaging often has a specified quantity and number, and product scrapping is generally not allowed. Therefore, in order to ensure that the vaccine syringe is not scrapped, the torque of the screw rod assembly device must be very precise.

[0004] However, in the prior art, since syringe assembly often takes a long time and involves multiple batches, under such conditions, the structure used to provide assembly torque, such as belts, often wears out or becomes fatigued, which causes the torque during the assembly of subsequent syringes to change, resulting in the syringe not being screwed into place.

[0005] In order to solve the above problems, it is necessary to adjust the torque. However, the torque assembly mechanism currently on the market has a complex structure, the steps for adjusting the torque are cumbersome, and it is impossible to adjust accurately.

[0006] In order to solve the above problem, the present invention proposes a technical solution, which can quickly adjust the torque during screwing assembly. Summary of the invention

[0007] In order to solve the above problems, the present invention discloses a rotary rod mechanism with adjustable tension for a rotary rod labeling machine. The technical solution of the present invention is implemented as follows:

[0008] A rotary rod mechanism with adjustable tension for a rotary rod labeling machine, comprising a synchronous belt, an elastic tensioning structure, a tension pressure sensor, a sector plate adjusting wheel, a power assembly, a sector plate, a driving wheel and a driven wheel;

[0009] The synchronous belt is wound around the driving wheel, the driven wheel and the fan-shaped plate adjusting wheel;

[0010] The power assembly is connected to the first end of the elastic tensioning structure, the second end of the elastic tensioning structure is fixed to the fan plate, the fan plate is fixed by the fan plate adjusting wheel, and the tension pressure sensor is fixed at the connection between the elastic tensioning structure and the power assembly.

[0011] Preferably, the power assembly includes a servo motor, a lead screw and a linear guide;

[0012] The output shaft of the servo motor is connected to the lead screw, the lead screw is connected to the linear guide rail, and the linear guide rail is connected to the first end of the elastic tensioning structure.

[0013] Preferably, it also includes a second power assembly;

[0014] The output shaft of the second power assembly is connected to the driving wheel.

[0015] Preferably, the tension and pressure sensor is a digital sensor.

[0016] Preferably, it also includes a display device;

[0017] The tension and pressure sensor is wirelessly connected to the display device.

[0018] Preferably, the elastic tensioning structure is a tension spring.

[0019] The present invention can adjust the tension of the synchronous belt in real time, thereby changing the torque of the syringe during assembly, ensuring that the assembly will not be affected by factors such as wear or fatigue of the synchronous belt. At the same time, the present invention can make the synchronous belt and the glass outer surface of the syringe form an over-rotation slipping effect by adjusting the tension of the synchronous belt, which can effectively ensure that the assembly does not over-rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0022] Figure 1 A top view of the structure of an embodiment of the present invention (without an upper cover plate);

[0023] Figure 2 A bottom view of the structure of an embodiment of the present invention;

[0024] Figure 3 is an axial view of an embodiment of the present invention;

[0025] Figure 4 This is a state structure diagram of a syringe in a specific application of an embodiment of the present invention.

[0026] In the above drawings, the figure numbers represent:

[0027] 1. Putting rod;

[0028] 2. Syringe;

[0029] 3. Synchronous belt;

[0030] 4. Extension spring;

[0031] 5. Rubber plug;

[0032] 6. Pull pressure sensor;

[0033] 7. Sector plate adjusting wheel;

[0034] 8. Servo motor;

[0035] 9, screw rod;

[0036] 10. Linear guide;

[0037] 11. Sector plate;

[0038] 12, driving wheel;

[0039] 13, driven wheel;

[0040] 14, second servo motor;

[0041] 15, upper cover;

[0042] 16. Rod twisting device. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specific implementation methods are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0045] In the description of the specific implementation methods of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0046] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0047] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0048] Throughout the present invention, numerical values ​​represent approximate measures or limits of ranges to cover minor deviations from given values ​​as well as embodiments with about the values ​​mentioned and embodiments with the exact values ​​mentioned. Except for the working examples provided at the end of the detailed description, all numerical values ​​of parameters (e.g., amounts or conditions) in this specification (including the appended claims) should be understood to be modified by the term "about" in all cases, regardless of whether "about" actually appears before the numerical value. "About" indicates that the stated numerical value allows some minor imprecision (close to the exact value of the value to some extent; approximately or reasonably close to the value; almost). If the imprecision provided by "about" is not otherwise understood in this ordinary sense in the art, "about" as used in the present invention at least indicates the variation that can be produced by the ordinary methods of measuring and using such parameters. For example, "about" may include a variation of less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5%, and in some aspects, optionally less than or equal to 0.1%.

[0049] Additionally, disclosure of ranges includes disclosure of all values ​​within the entire range and further divided ranges, including endpoints and sub-ranges given for such ranges.

[0050] Of course, in the prior art, since syringe assembly often takes a long time and involves multiple batches, under such conditions, the structure used to provide assembly torque, such as belts, often wears out or becomes fatigued, which causes changes in the torque during the assembly of subsequent syringes, resulting in the syringes not being screwed into place.

[0051] In order to solve the above problems, it is necessary to adjust the torque. However, the torque assembly mechanism currently on the market has a complex structure, the steps for adjusting the torque are cumbersome, and it is impossible to adjust accurately.

[0052] In order to solve the above problem, the present invention proposes a technical solution, which can quickly adjust the torque during screwing assembly.

[0053] The technical solution of the present invention is achieved as follows: a rotary rod mechanism with adjustable tension of a rotary rod labeling machine comprises a synchronous belt, an elastic tensioning structure, a tension pressure sensor, a sector plate adjusting wheel, a power assembly, a sector plate, a driving wheel and a driven wheel; the synchronous belt is wound around the driving wheel, the driven wheel and the sector plate adjusting wheel; the power assembly is connected to the first end of the elastic tensioning structure, the second end of the elastic tensioning structure is fixed to the sector plate, the sector plate is fixed by the sector plate adjusting wheel, and the tension pressure sensor is fixed to the connection between the elastic tensioning structure and the power assembly.

[0054] The invention adjusts the friction force when the glass outer surface of the syringe contacts the synchronous belt by adjusting the tension of the synchronous belt, thereby adjusting the torque during assembly. It is ensured that the syringe can be rotated into place during assembly. In addition, the tension of the synchronous belt is adjusted so that when the syringe is assembled in place, the glass outer surface and the synchronous belt slip, so that over-rotation does not occur.

[0055] In addition, due to the material of the synchronous belt, after long-term use, the synchronous belt may become fatigued, which will cause torque changes. The present invention adopts a power component and an elastic tensioning structure to adjust the tension of the synchronous belt.

[0056] When the belt needs to be tightened, the power component drives the first end of the elastic tensioning structure to move away from the fan plate, thereby causing the fan plate to swing, and then the position of the fan plate adjusting wheel also moves accordingly. The overall length of the synchronous belt wrapped around the driving wheel, the driven wheel and the fan plate adjusting wheel is stretched as the position of the fan plate adjusting wheel changes.

[0057] When the belt needs to be loosened, the power assembly drives the first end of the elastic tensioning structure to move away from the sector plate, thereby reducing the relative tension between the sector plate adjusting wheel and the elastic tensioning structure and reducing the tension of the synchronous belt.

[0058] In some embodiments, the power assembly includes a servo motor, a lead screw and a linear guide; the output shaft of the servo motor is connected to the lead screw, the lead screw is connected to the linear guide, and the linear guide is connected to the first end of the elastic tensioning structure.

[0059] The present invention uses a servo motor in combination with a lead screw and a linear guide rail to adjust the tension of the synchronous belt at any time. The specific adjustment process is: the servo motor drives the lead screw to slide along the linear guide rail to adjust the length of the tension spring.

[0060] In some embodiments, further comprising a second power assembly;

[0061] The output shaft of the second power assembly is connected to the driving wheel.

[0062] The function of the second power assembly is to provide power for the rotation of the synchronous belt.

[0063] The second power assembly drives the driving wheel to rotate, drives the synchronous belt to rotate, and then drives the driven wheel to rotate.

[0064] The rotation direction of the synchronous belt is opposite to that of the twisting rod device.

[0065] In some embodiments, the tension and pressure sensor is a digital sensor.

[0066] In some preferred embodiments, a display device is further included;

[0067] The tension and pressure sensor is wirelessly connected to the display device.

[0068] The present invention detects the tension of the tension spring in real time through a tension pressure sensor, thereby determining the tension of the synchronous belt, and transmits the tension information to a display device for real-time detection by a staff.

[0069] In some embodiments, the elastic tensioning structure is a tension spring.

[0070] The embodiments of the present invention will be described in more detail below by way of examples. It should be noted that the embodiments of the present invention are not limited to these examples.

[0071] Example

[0072] In a specific embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a rotary rod mechanism with adjustable tension of a rotary rod labeling machine includes a synchronous belt 3, a tension spring 4, a tension pressure sensor 6, a sector plate adjustment wheel 7, a servo motor 8, a lead screw 9, a linear guide rail 10, a sector plate 11, a driving wheel 12, a driven wheel 13, a second servo motor 14 and a display device;

[0073] The synchronous belt 3 is wound around the driving wheel 12, the driven wheel 13 and the fan-shaped plate adjusting wheel 7;

[0074] The output shaft of the servo motor 8 is connected to the lead screw, the lead screw is connected to the linear guide 10, the linear guide 10 is connected to the first end of the tension spring 4, the second end of the tension spring 4 is fixed on the fan plate 11, the fan plate 11 is fixed by the fan plate adjusting wheel 7, the tension pressure sensor 6 is fixed at the connection between the tension spring 4 and the linear guide 10, and the output shaft of the second servo motor 14 is connected to the driving wheel 12.

[0075] The tension pressure sensor 6 is a digital sensor.

[0076] The tension pressure sensor 6 is wirelessly connected to the display device.

[0077] In this embodiment, the upper cover plate 15 is used to hide components such as the synchronous belt 3, the driving wheel 12, the fan-shaped plate 11, etc., to provide dust prevention and protection.

[0078] like Figure 4 As shown, in a specific application, the rotating rod mechanism screws the thread of the push rod 1 into the syringe 2. In this embodiment, the syringe 2 rotates, and the push rod 1 is fixed in one direction and does not rotate. It is screwed in with the same rotation direction as the thread of the push rod 1. According to the different number of turns of the thread, the corresponding number of turns can be digitally set.

[0079] The rod screwing device 16 sends the syringe 2 and the push rod 1 to the assembly station. The syringe 2 rotates and the synchronous belt 3 contacts the glass surface of the syringe 2, generating friction, forming a torque to screw the push rod 1 in. The friction depends on the tension of the tension spring 4 that tightens the synchronous belt 3. The thread meshing and clearance between the push rod 1 and the rubber plug 5 in the syringe 2 of different manufacturers are different, and the tightening torque is different. Therefore, during production, in order to ensure that it does not over-rotate, the tension of the tension spring 4 is adjusted so that the synchronous belt 3 and the glass surface of the syringe 2 are tightened to form slippage without over-pressure, which can effectively ensure that it does not over-rotate.

[0080] The tension adjustment of the tension spring 4 is provided with a digital tension pressure sensor 6, which can be displayed and adjusted on a display device.

[0081] In this embodiment, the synchronous belt 3 is flexible and is tensioned by the tension spring 4, always close to the circumference of each roller, surrounding the needle cylinder 2. Due to the effect of friction, the contact can always be guaranteed, and the rotating rod can be rotated with a controllable number of turns.

[0082] The automatic tensioning of the synchronous belt 3 is achieved by swinging and tensioning the fan-shaped plate adjusting wheel 7, which has good mechanical properties and high efficiency.

[0083] The tension of the assembly is adjusted by the length of the tension spring 4, which is adjusted by the servo motor 8 rotating the lead screw so that the lead screw slides along the linear guide 10 to adjust the length of the tension spring 4.

[0084] It should be pointed out that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary rod mechanism with adjustable tension for a rotary rod labeling machine, characterized in that: It includes a synchronous belt, an elastic tensioning structure, a tension pressure sensor, a fan-shaped plate adjusting wheel, a power assembly, a fan-shaped plate, a driving wheel and a driven wheel; The synchronous belt is wound around the driving wheel, the driven wheel and the fan-shaped plate adjusting wheel; The power assembly is connected to the first end of the elastic tensioning structure, the second end of the elastic tensioning structure is fixed to the fan plate, the fan plate is fixed by the fan plate adjusting wheel, and the tension pressure sensor is fixed at the connection between the elastic tensioning structure and the power assembly.

2. The rotary rod mechanism with adjustable tension of the rotary rod labeling machine according to claim 1, characterized in that: The power assembly includes a servo motor, a lead screw and a linear guide rail; The output shaft of the servo motor is connected to the lead screw, the lead screw is connected to the linear guide rail, and the linear guide rail is connected to the first end of the elastic tensioning structure.

3. The rotary rod mechanism with adjustable tension of the rotary rod labeling machine according to claim 1, characterized in that: Also included is a second power assembly; The output shaft of the second power assembly is connected to the driving wheel.

4. The rotary rod mechanism with adjustable tension of the rotary rod labeling machine according to claim 1, characterized in that: The tension and pressure sensor is a digital sensor.

5. The rotary rod mechanism with adjustable tension of the rotary rod labeling machine according to claim 4, characterized in that: Also included is a display device; The tension and pressure sensor is wirelessly connected to the display device.

6. The rotary rod mechanism with adjustable tension of the rotary rod labeling machine according to claim 1, characterized in that: The elastic tensioning structure is a tension spring.

Images