A syringe rotary rod clamping structure, assembly equipment and installation sealing control method

Abstract

The present invention discloses a syringe rotary rod clamping structure, assembly equipment and installation sealing control method, wherein the syringe rotary rod clamping structure includes a base, an active jaw, a driven jaw and a retraction mechanism; the active jaw and the driven jaw are both rotatably mounted on the base, and the active jaw has a deflection state and a fixed state; when the active jaw is in the deflection state, the driven jaw is deflected in the opposite direction; when the active jaw is in the fixed state, the driven jaw can deflect independently or not; the retraction mechanism is arranged between the active jaw and the driven jaw. The present invention uses the above-mentioned device in conjunction, so that when the syringe rotary rod is tightly fitted with the bottle plug, it can automatically detach from the syringe rotary rod clamping structure, that is, it ensures that during the installation of the syringe rotary rod, the bottle plug will not produce any degree of self-rotation, thereby ensuring the sealing performance of the bottle plug.

Description

Technical Field

[0001] The present invention relates to the field of syringe processing, and in particular to a syringe rotary rod clamping structure, assembly equipment and installation sealing control method. Background Art

[0002] For syringe products, such as liquid syringes used in medical treatment, during manufacturing, the rotary rod and the bottle body are usually tightened and assembled through a rotary rod mechanism. That is, the rotary rod mechanism needs to be precisely designed so that when the bottle body passes through the rotary rod mechanism, it can be driven by the rotary rod mechanism to rotate a preset number of circles, while the rotary rod needs to remain stationary. In this way, the threaded end of the rotary rod can be rotated relative to the pre-installed rubber stopper in the bottle body for the preset number of circles and tightened, that is, the rotary rod is screwed into the bottle body to a preset depth.

[0003] The existing rotary lever mechanism for prefilled syringes can be roughly divided into the following types of rotary lever control technologies:

[0004] 1. Use a common variable frequency motor to control the belt to drive the bottle body to rotate, so that the rotating rod is screwed into the bottle body.

[0005] Second, the belt is controlled by a servo motor to drive the bottle to rotate. Since there is a clear speed ratio between the servo motor and the main shaft of the equipment, the number of rotations of the bottle is guaranteed to be fixed.

[0006] Third, a set of rollers controlled by a servo motor gradually screws the product into the stopper by adjusting the friction between the rollers and the bottle body, ensuring torque control of the stopper and preventing displacement during the screwing process.

[0007] However, all three methods mentioned above have certain defects: for example, the first method is controlled by an ordinary variable frequency motor. Since it does not have any over-tightening control, the rubber stopper will produce a large rotational displacement in the syringe, thereby creating a risk of vacuum destruction. During the drug production process, random inspections and bacterial culture tests are required to determine whether the standards are met.

[0008] The second method, which uses a servo motor to control the number of turns to install the rod, can cause the rod to not fit properly because the threaded entry point cannot be precisely aligned during the rod's threading. To address this, this type of equipment must be set to tighten the rod an extra half to one turn, which in turn causes a small degree of rotational displacement of the stopper in the syringe. This means that random inspections and bacterial culture tests are still required during production to determine compliance with standards.

[0009] In addition, although the third method of installing the rotary rod by roller friction can achieve a certain effect, the roller will wear out. The worn roller cannot ensure the friction between the roller and the bottle body, resulting in insufficient effective rotary rod torque. Therefore, after long-term operation, it needs to be calibrated or replaced again, and it cannot be adjusted accordingly according to the actual torque requirements, which makes it more troublesome to use.

[0010] Therefore, a syringe rotary rod clamping structure, assembly equipment and installation sealing control method are needed to solve the above problems. Summary of the Invention

[0011] The purpose of the present invention is to provide a syringe rotary rod clamping structure, assembly equipment and installation sealing control method to ensure that the rotary rod does not produce any degree of rotational displacement of the bottle plug during the installation process, and can meet the installation requirements of matching rotary rods with different bottle plugs, and can monitor the effective torque of the rotary rod in real time.

[0012] In order to solve the above technical problems, the present invention provides a syringe rotary rod clamping structure, comprising a base, an active clamping jaw, a driven clamping jaw and a retraction mechanism;

[0013] The active clamping jaw and the driven clamping jaw are both rotatably mounted on the base, and the active clamping jaw has a deflected state and a fixed state;

[0014] When the active clamping jaw is in a deflected state, the driven clamping jaw is deflected in the opposite direction;

[0015] When the active jaw is in a fixed state, the driven jaw can deflect or not deflect independently;

[0016] The retraction mechanism is arranged between the active clamping jaw and the driven clamping jaw, and is used to provide a pre-tightening force so that the active clamping jaw and the driven clamping jaw clamp and fix the syringe rotating rod;

[0017] When the active clamping jaw is in a fixed state and the rotational force applied to the syringe rotating rod is greater than the pre-tightening force, the driven clamping jaw is pushed to deflect in a direction away from the active clamping jaw.

[0018] Furthermore, the pre-tightening force is set to be elastic force, magnetic force or electromagnetic adsorption force.

[0019] Furthermore, the retraction mechanism is configured as two groups of mutually attracted magnet columns;

[0020] The two groups of magnet columns are respectively arranged inside the active clamping jaw and the driven clamping jaw, and the distance between the two magnet columns located in the same plane can be adjusted.

[0021] Furthermore, the magnet columns are all installed inside the active clamping jaw and the driven clamping jaw through threads.

[0022] Furthermore, the inner side of the driven clamping jaw has a first protrusion;

[0023] The inner side of the active clamping jaw has a second protrusion that abuts against the first protrusion, and also has an arc-shaped groove that matches the first protrusion;

[0024] When the active clamping jaw deflects, the second protrusion pushes the first protrusion to deflect;

[0025] When the driven jaw deflects, the first protrusion rotates inside the arc-shaped slot and separates from the second protrusion.

[0026] Furthermore, the active clamping jaw and the driven clamping jaw are rotatably connected to the base via a long connecting rod and a short connecting rod respectively;

[0027] The long connecting rod and the short connecting rod are both connected to the base through bearings.

[0028] On the other hand, the present invention also provides a syringe rotary rod assembly device, comprising a support frame, a star wheel disk rack, a support disk rack, and a plurality of syringe rotary rod clamping structures according to any one of the above embodiments;

[0029] The star wheel frame is rotatably mounted on the top of the support frame via a rotating shaft;

[0030] The support plate rack is fixedly mounted on the outer wall of the support frame;

[0031] A plurality of syringe rotating rod clamping structures are arranged in a ring shape and equidistantly on the star wheel frame, and one end of the active clamping claw extends into the support plate frame;

[0032] The support plate frame has a feeding station and an assembly station;

[0033] When the syringe rotary rod clamping structure follows the star wheel frame to rotate to the feeding station, the active clamping claw is in a deflected state;

[0034] When the syringe rotary rod clamping structure rotates to the assembly station following the star wheel frame, the active clamping claw is in a fixed state.

[0035] Furthermore, one end of the active clamping claw in contact with the support plate frame is fixedly connected to a cam follower;

[0036] A cam track matching the cam follower is formed in the support plate frame;

[0037] The cam track at the feeding station has a raised section, and the cam track at the assembly station has a smooth section.

[0038] On the other hand, the present invention also provides a syringe rotary rod installation seal control method, comprising the following steps:

[0039] A syringe rod clamping structure is provided, which uses a pre-tightening force equivalent to the maximum static friction between the syringe rod and the bottle stopper to clamp the syringe rod;

[0040] Controlling the syringe rotating rod to connect with the corresponding bottle body;

[0041] Pulling the bottle body to rotate, so as to screw the syringe rod into the bottle body until it contacts the bottle stopper;

[0042] When the torque formed between the bottle plug and the syringe rotating rod is greater than the pre-tightening force, the syringe rotating rod is separated from the syringe rotating rod clamping structure and rotates synchronously with the bottle body.

[0043] Furthermore, the measurement of the preload force includes the following steps:

[0044] A concave cavity is formed between the contact surfaces of the active clamping jaw and the driven clamping jaw of the syringe rotary rod clamping structure;

[0045] A thrust measuring instrument is placed in the cavity, and when the syringe rotary rod clamping structure is closed, the pre-tightening force is measured by the thrust measuring instrument.

[0046] Furthermore, the clamping of the syringe rotating rod includes the following steps:

[0047] Driving the syringe rotary rod clamping structure to rotate to the feeding station of the support plate frame, and opening the active clamping jaw and the driven clamping jaw of the syringe rotary rod clamping structure in opposite directions;

[0048] Placing the syringe rotating rod between the active clamping jaw and the driven clamping jaw, and controlling the syringe rotating rod to move synchronously with the syringe rotating rod clamping structure;

[0049] The syringe rotating rod clamping structure is driven to rotate to the assembly station of the support plate frame, the active clamping jaw is reset and closed, and the driven clamping jaw is fitted with the active clamping jaw under the action of the contraction mechanism to wrap and clamp the syringe rotating rod.

[0050] Compared with the prior art, the present invention has at least the following beneficial effects:

[0051] By arranging an active clamping jaw, a driven clamping jaw and a contraction mechanism, a clamping structure that provides a pre-tightening force for the syringe rotary rod is formed, and the active clamping jaw has a deflected state and a fixed state. By utilizing the cooperation relationship between the active clamping jaw and the driven clamping jaw, the syringe rotary rod can continue to be screwed in when it is not in contact with the bottle stopper. When the syringe rotary rod is in contact with the bottle stopper and the relative resistance formed by the two is greater than the pre-tightening force, the syringe rotary rod can be directly separated from the clamping structure, thereby effectively avoiding the situation where the sealing performance of the bottle stopper is destroyed due to excessive relative rotation between the syringe rotary rod and the bottle stopper, that is, ensuring that the bottle stopper will not produce any degree of self-rotation during the installation of the syringe rotary rod.

[0052] Furthermore, through the star-wheel disk rack, the syringe rotary rod clamping structure can rotate synchronously with the star-wheel disk rack, and by setting up a support disk rack with a feeding station and an assembly station, the opening and closing of the syringe rotary rod clamping structure can be controlled, thereby sustainably controlling the assembly of the syringe rotary rod and the bottle stopper, thereby achieving the purpose of improving the production rate.

[0053] In addition, by setting up a cam follower and a cam track, the active clamping jaw in the syringe rotary rod clamping structure is in a fixed state when it is located at the assembly station, so as to ensure that when the resistance of the syringe rotary rod is greater than the pre-tightening force, the active clamping jaw will not interfere with the deflection of the driven clamping jaw, thereby ensuring the stable progress of the process.

[0054] Furthermore, by utilizing the syringe rod clamping structure to clamp the syringe rod, the pre-tightening force on the syringe rod can be monitored. Thus, when different bottles are replaced for assembly, the pre-tightening force can be adaptively adjusted by measuring the maximum static friction between the syringe rod and the corresponding bottle stopper to meet the corresponding installation requirements between the syringe rod and different bottles.

[0055] In addition, the thrust measuring instrument can be used to check the preload force of the syringe rod clamping structure at any time to achieve precise control and effectively improve the product production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 Schematic diagram of the structure of the syringe rotary rod clamping structure in one embodiment of the present invention;

[0057] Figure 2 A top view of a syringe rotary rod clamping structure according to an embodiment of the present invention;

[0058] Figure 3 Schematic diagram of the structure of a syringe rotating rod assembly device according to one embodiment of the present invention;

[0059] Figure 4Schematic diagram of the structure of the syringe rotary rod assembly device when the clamping structure is connected to the support plate frame in one embodiment of the present invention;

[0060] Figure 5 Schematic diagram of the structure of the clamping structure in the syringe rotary rod assembly device in one embodiment of the present invention when it is in different positions on the support plate frame;

[0061] Figure 6 This is a flow chart of a syringe rotary rod installation seal control method according to one embodiment of the present invention.

[0062] Figure numbers: 1. Base; 2. Active clamping jaw; 21. Second protrusion; 22. Arc groove; 3. Driven clamping jaw; 31. First protrusion; 4. Retraction mechanism; 5. Short connecting rod; 6. Long connecting rod; 61. Cam follower; 7. Support frame; 8. Star wheel frame; 9. Support disk frame; 91. Cam track. DETAILED DESCRIPTION

[0063] The following is a more detailed description of the syringe rod clamping structure, assembly apparatus, and installation seal control method of the present invention, with reference to schematic diagrams. Preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art may modify the invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as generally known to those skilled in the art and not as a limitation of the present invention.

[0064] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are provided solely for the purpose of assisting in the description of the embodiments of the present invention.

[0065] Example 1

[0066] like Figure 1 As shown, an embodiment of the present invention provides a syringe rotary rod clamping structure, which includes a base 1, an active clamping jaw 2, a driven clamping jaw 3 and a retracting mechanism 4.

[0067] The active clamping jaw 2 and the driven clamping jaw 3 are both rotatably mounted on the base 1 , and the active clamping jaw 2 has a deflected state and a fixed state.

[0068] Specifically, when the active jaw 2 is in a deflected state, the driven jaw 3 is deflected in the opposite direction to accommodate the syringe rotating rod, that is, when the active jaw 2 is in a deflected state, the syringe rotating rod can be placed between the active jaw 2 and the driven jaw 3 under the action of external force.

[0069] When the active jaw 2 is in a fixed state, the driven jaw 3 can deflect independently or not deflect, that is, the active jaw 2 is in a fixed state, and the driven jaw 3 can be relatively deflected by an external force, so that the syringe rotating rod can be disengaged autonomously.

[0070] The retracting mechanism 4 is provided between the active clamping jaw 2 and the driven clamping jaw 3 and is used to provide a pre-tightening force so that the active clamping jaw 2 and the driven clamping jaw 3 clamp and fix the syringe rotating rod.

[0071] It should be noted that when the active clamp 2 is in a fixed state and the rotational force acting on the syringe rotary rod is greater than the pre-tightening force, the driven clamp 3 is pushed to deflect in the direction away from the active clamp 2, that is, when the relative force formed between the syringe rotary rod and the bottle body and cork is greater than the pre-tightening force, the driven clamp 3 can be forced to separate from the active clamp 2, so that the syringe rotary rod can rotate synchronously with the bottle body and cork in the subsequent process, and the installation of the syringe rotary rod is completed while ensuring the sealing of the bottle body and the relative rotation of the bottle body and cork.

[0072] It should also be noted that a limiting groove for limiting the syringe rotating rod should be provided on the side where the active clamping jaw 2 and the driven clamping jaw 3 are close to each other, that is, when the active clamping jaw 2 and the driven clamping jaw 3 are close to each other and clamp the syringe rotating rod, the syringe rotating rod is in a relatively fixed state (specifically, it cannot rotate).

[0073] The device forms a clamping structure that provides a pre-tightening force for the syringe shaft by arranging an active clamping jaw 2, a driven clamping jaw 3 and a contraction mechanism 4, and the active clamping jaw 2 has a deflected state and a fixed state. The cooperation relationship between the active clamping jaw 2 and the driven clamping jaw 3 is utilized (that is, the active clamping jaw 2 can control the driven clamping jaw 3 to deflect in the opposite direction, and the driven clamping jaw 3 can deflect independently of the active clamping jaw 2), so that the syringe shaft can continue to be screwed in when it is not in contact with the bottle stopper, and when the syringe shaft is in contact with the bottle stopper and the relative resistance formed by the two is greater than the pre-tightening force, the syringe shaft can be directly separated from the clamping structure, thereby effectively avoiding the situation where the sealing performance of the bottle stopper is destroyed due to excessive relative rotation between the syringe shaft and the bottle stopper, that is, ensuring that the bottle stopper will not produce any degree of self-rotation during the installation of the syringe shaft, thereby effectively ensuring the sealing performance of the product.

[0074] In other embodiments, the preload force can be set to elastic force, magnetic force or electromagnetic adsorption force, or can be set to other control forces that can control the active jaw 2 to fit with the driven jaw 3, and can autonomously open the driven jaw 3 when subjected to a force greater than the preload force.

[0075] In this embodiment, the pre-tightening force used is magnetic force, so as to better complete the control of the pre-tightening force, that is, the pre-tightening force is equivalent to the adsorption force between the active clamping jaw 2 and the driven clamping jaw 3.

[0076] Specifically, the retracting mechanism 4 is configured as two groups of mutually attracted magnet columns, and the two groups of magnet columns are respectively disposed inside the active clamping jaw 2 and the driven clamping jaw 3 .

[0077] In addition, the distance between the two magnet columns located in the same plane can be adjusted, that is, the pre-tightening force can be adjusted so as to be used for assembling the syringe rotating rod with bottle bodies or stoppers of different specifications or materials.

[0078] In a further embodiment, the magnet columns are further defined as being installed inside the active clamping jaw 2 and the driven clamping jaw 3 through threads.

[0079] like Figure 2 As shown, in this embodiment, in order to enable the driven jaw 3 to rotate following the deflection of the active jaw 2 and also to rotate relatively to itself to meet the requirements of the syringe rotary rod installation, the active jaw 2 and the driven jaw 3 are further defined.

[0080] Specifically, the inner side of the driven clamping jaw 3 has a first protrusion 31 .

[0081] The inner side of the active clamping jaw 2 has a second protrusion 21 that abuts against the first protrusion 31 , and also has an arc-shaped groove 22 that matches the first protrusion 31 .

[0082] When the active jaw 2 deflects, the second protrusion 21 pushes the first protrusion 31 to deflect, that is, when the active jaw 2 is in a deflected state, the driven jaw 3 can deflect in the opposite direction to accommodate the syringe shaft.

[0083] When the driven jaw 3 deflects, the first protrusion 31 rotates inside the arc groove 22 and separates from the second protrusion 21. That is, when the active jaw 2 remains fixed at this time, the driven jaw 3 can still deflect, realizing the function of independent deflection of the driven jaw 3, paving the way for the subsequent separation of the syringe rotating rod from the device.

[0084] It should also be noted that the active clamping jaw 2 and the driven clamping jaw 3 are rotatably connected to the base 1 via a long connecting rod 6 and a short connecting rod 5 respectively.

[0085] The long connecting rod 6 and the short connecting rod 5 are both connected to the base 1 through bearings, so that the active clamping jaw 2 can be switched between a fixed state and a deflected state by other devices.

[0086] Example 2

[0087] like Figure 3 As shown, this embodiment proposes a syringe rotary rod assembly device based on the first embodiment, so as to continuously install the syringe rotary rod and improve the production rate of the product.

[0088] Specifically, a syringe rotary rod assembly device includes a support frame 7, a star wheel disk rack 8, a support disk rack 9 and the syringe rotary rod clamping structure described in embodiment 1.

[0089] The star wheel frame 8 is rotatably mounted on the top of the support frame 7 via a rotating shaft, and the support plate frame 9 is fixedly mounted on the outer wall of the support frame 7, that is, the star wheel frame 8 can rotate relative to the support plate frame 9.

[0090] A plurality of groups of syringe rotary rod clamping structures are equidistantly arranged in a ring shape on the star wheel frame 8 , and one end of the active clamping jaw 2 extends into the support disk frame 9 .

[0091] The support plate frame 9 has a feeding station and an assembly station.

[0092] It should be noted that when the syringe rotary rod clamping structure follows the star wheel frame 8 to rotate to the feeding station, the active clamping jaw 2 is in a deflected state.

[0093] When the syringe rotary rod clamping structure rotates to the assembly station following the star wheel frame 8, the active clamping jaw 2 is in a fixed state.

[0094] That is, the star wheel frame 8 drives the active clamping jaw 2 to rotate, and uses the supporting disk frame 9 to complete the switching of the state of the active clamping jaw 2 (that is, the switching between the deflected state and the fixed state).

[0095] like Figure 4 and Figure 5 As shown, in this embodiment, the syringe rotary rod clamping structure is further defined to cooperate with the support plate frame 9 to better switch and control the state of the active clamping jaw 2.

[0096] Specifically, one end of the active clamping jaw 2 that contacts the support plate frame 9 is fixedly connected to the cam follower 61 , that is, the long connecting rod 6 is fixedly connected to the cam follower 61 .

[0097] A cam track 91 matching the cam follower 61 is formed in the support plate frame 9 .

[0098] The cam track 91 at the feed station has a raised section (such as Figure 5 (shown by the dashed line in the middle), the cam track 91 at the assembly station has a smooth section.

[0099] That is, the active clamping jaw 2 is deflected or kept fixed by changing the distance between the center of the cam follower 61 and the support plate frame 9 .

[0100] The raised section can be divided into two parts: one gradually moving away from the center of the support plate frame 9 and the other gradually moving closer to the center of the support plate frame 9. This allows the active clamping jaw 2 to gradually deflect to its maximum angle and then gradually retract. When it moves to the smooth section, the active clamping jaw 2 is in a reset state, and the driven clamping jaw 3 is in contact with the active clamping jaw 2 under the action of the retraction mechanism 4. Furthermore, through the above-mentioned operating trajectory, the device can cooperate with the syringe rod feeding mechanism or manual placement to sequentially complete the placement and gripping of the syringe rod, based on which the subsequent assembly of the syringe rod with the bottle body or stopper can be carried out.

[0101] To sum up, this device sets up a star wheel disk rack 8 so that the syringe rotary rod clamping structure can rotate synchronously with the star wheel disk rack 8, and sets up a support disk rack 9 with a feeding station and an assembly station to control the opening and closing of the syringe rotary rod clamping structure (that is, the switching of the deflection state and the fixed state of the active clamping jaw 2), thereby sustainably controlling the assembly of the syringe rotary rod and the bottle stopper, thereby achieving the purpose of improving the production rate.

[0102] In addition, by setting a cam follower 61 and a cam track 91, the device ensures that the active jaw 2 in the syringe rotary rod clamping structure is in a fixed state when it is located at the assembly station, so as to ensure that when the resistance to the syringe rotary rod is greater than the pre-tightening force, the active jaw 2 will not interfere with the deflection of the driven jaw 3, thereby ensuring the stable progress of the process.

[0103] Example 3

[0104] like Figure 6 As shown, this embodiment is based on the syringe rotary rod assembly equipment proposed above, and further proposes a syringe rotary rod installation sealing control method to improve the assembly effect of the syringe rotary rod and the bottle body and stopper.

[0105] Specifically, a syringe rotary rod installation seal control method includes the following steps:

[0106] S1. Provide a syringe rod clamping structure, using a preload force equal to the maximum static friction between the syringe rod and the bottle stopper to clamp the syringe rod;

[0107] S2, controlling the syringe rotating rod to connect with the corresponding bottle body;

[0108] S3, pulling the bottle body to rotate, so as to screw the syringe rod into the bottle body until it contacts the bottle stopper;

[0109] S4, when the torque formed between the bottle plug and the syringe rotating rod is greater than the pre-tightening force, the syringe rotating rod and the

[0110] The syringe rotating rod clamping structure is separated and rotates synchronously with the bottle body.

[0111] In this embodiment, the clamping of the syringe shaft is completed by setting a pre-tightening force equal to the maximum static friction between the syringe shaft and the bottle stopper. When the syringe shaft is fully in contact with the bottle stopper and continues to rotate, the torque formed therebetween will be greater than the maximum static friction between the two. Therefore, the syringe shaft clamping structure can be opened with the help of this force (i.e., the driven clamping jaw 3 is deflected), so that the syringe shaft is separated from the syringe shaft clamping structure and can rotate synchronously with the bottle body, that is, the assembly of the syringe shaft, the bottle stopper and the bottle body is completed. There is no need to worry about the torque between the syringe shaft and the bottle stopper being too large, causing the bottle stopper to rotate and resulting in damage to the product sealing.

[0112] In addition, this method uses the syringe rod clamping structure to clamp the syringe rod, so that the pre-tightening force on the syringe rod can be monitored. Then, when different bottles are replaced for assembly, the pre-tightening force can be adaptively adjusted by measuring the maximum static friction between the syringe rod and the corresponding bottle stopper to meet the corresponding installation requirements between the syringe rod and different bottles.

[0113] Specifically, the measurement of the preload force includes the following steps:

[0114] A concave cavity is formed between the contact surfaces of the active clamping jaw 2 and the driven clamping jaw 3 of the syringe rotary rod clamping structure;

[0115] A thrust measuring instrument is placed in the cavity, and when the syringe rotary rod clamping structure is closed, the pre-tightening force is measured by the thrust measuring instrument.

[0116] That is, by setting up a thrust measuring instrument, the preload force of the syringe rotary rod clamping structure can be checked at any time, so as to achieve precise control and effectively improve the product production yield.

[0117] The clamping of the syringe rotating rod includes the following steps:

[0118] Drive the syringe rotary rod clamping structure to rotate to the feeding station of the support plate frame 9, and open the active clamping jaw 2 and the driven clamping jaw 3 of the syringe rotary rod clamping structure in opposite directions;

[0119] The syringe rotating rod is placed between the active clamping jaw 2 and the driven clamping jaw 3, and the syringe rotating rod is controlled to move synchronously with the syringe rotating rod clamping structure;

[0120] The syringe rod clamping structure is driven to rotate to the assembly station of the support disk frame 9, the active clamping jaw 2 is reset and closed, and the driven clamping jaw 3 is fitted with the active clamping jaw 2 under the action of the retraction mechanism 4 to wrap and clamp the syringe rod.

[0121] In order to facilitate the continuous and uninterrupted assembly of the syringe rotating rod and improve the production speed of the product.

[0122] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A syringe rotating rod clamping structure, characterized in that: It includes a base, an active clamping jaw, a driven clamping jaw and a retracting mechanism; The active clamping jaw and the driven clamping jaw are both rotatably mounted on the base, and the active clamping jaw has a deflected state and a fixed state; When the active clamping jaw is in a deflected state, the driven clamping jaw is deflected in the opposite direction; When the active jaw is in a fixed state, the driven jaw can deflect or not deflect independently; The retraction mechanism is arranged between the active clamping jaw and the driven clamping jaw, and is used to provide a pre-tightening force so that the active clamping jaw and the driven clamping jaw clamp and fix the syringe rotating rod; When the active clamping jaw is in a fixed state and the rotational force applied to the syringe rotating rod is greater than the pre-tightening force, the driven clamping jaw is pushed to deflect in a direction away from the active clamping jaw.

2. The syringe rod clamping structure according to claim 1, wherein: The pre-tightening force is set to be elastic force, magnetic force or electromagnetic adsorption force.

3. The syringe rod clamping structure according to claim 1, wherein: The contraction mechanism is configured as two sets of mutually attracted magnet columns; The two groups of magnet columns are respectively arranged inside the active clamping jaw and the driven clamping jaw, and the distance between the two magnet columns located in the same plane can be adjusted.

4. The syringe rod clamping structure according to claim 3, wherein: The magnet columns are all installed inside the active clamping jaw and the driven clamping jaw through threads.

5. The syringe rotating rod clamping structure according to claim 1, wherein: The inner side of the driven clamping jaw has a first protrusion; The inner side of the active clamping jaw has a second protrusion that abuts against the first protrusion, and also has an arc-shaped groove that matches the first protrusion; When the active clamping jaw deflects, the second protrusion pushes the first protrusion to deflect; When the driven jaw deflects, the first protrusion rotates inside the arc-shaped slot and separates from the second protrusion.

6. The syringe rod clamping structure according to claim 1, wherein: The active clamping jaw and the driven clamping jaw are rotatably connected to the base via a long connecting rod and a short connecting rod respectively; The long connecting rod and the short connecting rod are both connected to the base through bearings.

7. A syringe rotating rod assembly device, characterized in that: It comprises a support frame, a star wheel disk frame, a support disk frame and a plurality of groups of syringe rotating rod clamping structures according to any one of claims 1 to 6; The star wheel frame is rotatably mounted on the top of the support frame via a rotating shaft; The support plate rack is fixedly mounted on the outer wall of the support frame; A plurality of syringe rotating rod clamping structures are arranged in a ring shape and equidistantly on the star wheel frame, and one end of the active clamping claw extends into the support plate frame; The support plate frame has a feeding station and an assembly station; When the syringe rotary rod clamping structure follows the star wheel frame to rotate to the feeding station, the active clamping claw is in a deflected state; When the syringe rotary rod clamping structure rotates to the assembly station following the star wheel frame, the active clamping claw is in a fixed state.

8. The syringe rotating rod assembly device according to claim 7, characterized in that: One end of the active clamping claw in contact with the support plate frame is fixedly connected to a cam follower; A cam track matching the cam follower is formed in the support plate frame; The cam track at the feeding station has a raised section, and the cam track at the assembly station has a smooth section.

9. A syringe rotary rod installation and sealing control method, using the syringe rotary rod assembly device according to any one of claims 7-8, characterized in that: The steps include: A syringe rod clamping structure is provided, which uses a pre-tightening force equivalent to the maximum static friction between the syringe rod and the bottle stopper to clamp the syringe rod; Controlling the syringe rotating rod to connect with the corresponding bottle body; Pulling the bottle body to rotate, so as to screw the syringe rod into the bottle body until it contacts the bottle stopper; When the torque formed between the bottle plug and the syringe rotating rod is greater than the pre-tightening force, the syringe rotating rod is separated from the syringe rotating rod clamping structure and rotates synchronously with the bottle body.

10. The syringe rotary rod installation sealing control method according to claim 9, characterized in that: The measurement of the preload force comprises the following steps: A concave cavity is formed between the contact surfaces of the active clamping jaw and the driven clamping jaw of the syringe rotary rod clamping structure; A thrust measuring instrument is placed in the cavity, and when the syringe rotary rod clamping structure is closed, the pre-tightening force is measured by the thrust measuring instrument.

11. The syringe rotary rod installation sealing control method according to claim 9, characterized in that: The clamping of the syringe rotating rod comprises the following steps: Driving the syringe rotary rod clamping structure to rotate to the feeding station of the support plate frame, and opening the active clamping jaw and the driven clamping jaw of the syringe rotary rod clamping structure in opposite directions; Placing the syringe rotating rod between the active clamping jaw and the driven clamping jaw, and controlling the syringe rotating rod to move synchronously with the syringe rotating rod clamping structure; The syringe rotating rod clamping structure is driven to rotate to the assembly station of the support plate frame, the active clamping jaw is reset and closed, and the driven clamping jaw is fitted with the active clamping jaw under the action of the contraction mechanism to wrap and clamp the syringe rotating rod.

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