Tube inserting mechanism of Luer lock protective cap assembling machine

Abstract

The utility model discloses a tube inserting mechanism of a Luer lock protective cap assembling machine, which belongs to the field of industrial production and comprises a pre-filled syringe after dosing, an adapter fixed on an injection port of the pre-filled syringe and a Luer lock protective cap for sealing the injection port of the pre-filled syringe. And the adapter is connected with the stud end of the Luer lock protective cap through a thread structure. Compared with the prior art, the device has the advantages that the center position of the Luer lock protective cap is checked through the three-jaw fixing disc, and the hollow gear column below the three-jaw fixing disc is meshed with the driving gear for driving, so that the stability of the three-jaw fixing disc is ensured; a convex table inserted into the hollow gear column is arranged in the hollow gear column, and the three-jaw fixing disc is controlled through a tightness adjusting motor, so that automatic connection of the Luer lock protective cap and the adapter is completed.

Description

Technical Field

[0001] This utility model relates to the field of industrial production, specifically to a tube insertion mechanism for a Luer lock cap assembly machine. Background Technology

[0002] In current pharmaceutical production, in order to facilitate the use of drugs, the drug solution is usually pre-quantitatively extracted and stored in pre-filled syringes. To ensure the sealing of the drug solution, it is sealed with a Luer lock cap and the sealing is automated by machine. Usually, a corresponding syringe rotary table is used for production line production. In order to ensure the stability during docking, the assembly machine used for the Luer lock cap has a special cannula positioning mechanism.

[0003] The insertion mechanism of existing Luer lock cap assembly machines is generally a Luer lock conveyor belt installed on one side below the pre-filled syringe to complete automated feeding. A locking connection mechanism is installed below the adapter of the pre-filled syringe. The locking connection mechanism is generally a rotating and synchronously rising screw lifter. Before connection, the locking connection mechanism needs to use the corresponding slot to fix the Luer lock cap to ensure the stability of the connection.

[0004] However, after changing the model of the Luer lock cap, the slot above the locking connection mechanism needs to be replaced simultaneously. During the splicing of the tube, the Luer lock cap is prone to warping due to the deviation of the force point, which may cause damage to the internal threads when the Luer lock cap is connected to the adapter. Summary of the Invention

[0005] The technical problem this utility model aims to solve is that the insertion mechanism of the existing Luer lock cap assembly machine cannot fix the Luer lock cap without changing the Luer lock cap fixing slot, and cannot ensure that the Luer lock cap will not shift in direction when it is connected to the adapter.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a cannulation mechanism for a Luer lock cap assembly machine, comprising a pre-filled syringe after drug addition, an adapter fixed to the injection port of the pre-filled syringe, and a Luer lock cap for sealing the injection port of the pre-filled syringe. The adapter is connected to the stud end of the Luer lock cap via a threaded structure. A syringe rotary table for fixing the pre-filled syringe assembly line is provided on one side of the tubing of the pre-filled syringe, and a locking connection mechanism for the adapter and the Luer lock cap is connected below the pre-filled syringe. A Luer lock conveyor belt for providing the Luer lock cap is provided on one side of the locking connection mechanism.

[0007] The locking connection mechanism includes a fixed platform located at the output end of the Luer lock conveyor belt, an electromagnetic lifting rod that controls the up and down movement of the Luer lock cap, a three-jaw fixing plate located above the fixed platform, and a convex platform passing through the bottom surface of the three-jaw fixing plate. The output end of the electromagnetic lifting rod is welded with a storage groove for storing the Luer lock cap, and the storage groove passes through the bottom surface of the convex platform and the three-jaw fixing plate.

[0008] A hollow gear column is welded to the bottom of the three-jaw fixing plate and sleeved on the outer wall of the cylindrical end of the convex platform. A drive gear that meshes with the hollow gear column is provided on one side of the hollow gear column. A servo motor that drives the drive gear is provided on the bottom surface of the convex platform. A tension adjustment motor that drives the rotating screw of the three-jaw fixing plate is provided on the side of the three-jaw fixing plate.

[0009] The syringe rotating platform is connected to the hand pressure plate of the pre-filled syringe via an I-shaped movable clamp. A single open rectangular groove is provided behind the I-shaped movable clamp, which is locked at the end of the horizontal block on the bottom surface of the I-shaped movable clamp. A compression spring for controlling the height of the pre-filled syringe is provided between the horizontal block on the bottom surface of the I-shaped movable clamp and the single open rectangular groove.

[0010] As an improvement, one side of the Luer lock conveyor belt is provided with a pneumatic telescopic rod for pushing the Luer lock cap, and the opposite side of the pneumatic telescopic rod is provided with a sliding groove connecting the top surface of the fixed platform. One side of the fixed platform is provided with a connecting groove connecting the sliding groove, and the top surface of the connecting groove is located above the output rod of the electromagnetic lifting rod.

[0011] As an improvement, the top surface of the I-beam movable clamp is provided with a concave groove for engaging the hand pressure plate of the pre-filled syringe.

[0012] As an improvement, the convex platform has a support at its lower part, and the support at the lower part of the convex platform is connected to the top surface of the fixed platform by a bolt structure.

[0013] As an improvement, a tension adjustment fixing plate for supporting the tension adjustment motor is welded to the side of the three-jaw fixing plate.

[0014] As an improvement, the output end of the pneumatic telescopic rod is provided with a negative pressure fixing plate that adsorbs the outer wall of the Luer lock cap.

[0015] The advantages of this invention compared to the prior art are as follows: This device uses a three-jaw fixing plate to check the center position of the Luer lock cap, and drives it by meshing with the drive gear through the hollow gear column below the three-jaw fixing plate. In order to ensure the stability of the three-jaw fixing plate, the hollow gear column has a convex platform inside for inserting the hollow gear column. The three-jaw fixing plate is controlled by a tension adjustment motor, thereby completing the automated connection between the Luer lock cap and the adapter. Attached Figure Description

[0016] Figure 1This is a general structural diagram of the tube insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0017] Figure 2 This is a cross-sectional view of the overall structure of the tube insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0018] Figure 3 This is an exploded view of the I-beam movable clamping plate connection of the insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0019] Figure 4 This is an exploded view of the locking connection mechanism of the tube insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0020] Figure 5 This is an exploded view of the pre-filled syringe of the insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0021] Figure 6 This is a structural diagram of the three-jaw fixing plate of the tube insertion mechanism of a Luer lock cap assembly machine according to this utility model.

[0022] As shown in the figure: 1. Pre-filled syringe; 2. Adapter; 3. Luer lock cap; 4. Syringe rotating table; 5. Locking connection mechanism; 51. Fixed table; 511. Connecting groove; 52. Electromagnetic lifting rod; 521. Storage groove; 53. Three-jaw fixing plate; 531. Tension adjustment motor; 532. Tension adjustment fixing plate; 54. Convex table; 55. Hollow gear column; 56. Drive gear; 57. Servo motor; 6. Luer lock conveyor belt; 61. Pneumatic telescopic rod; 611. Negative pressure fixing plate; 62. Sliding groove; 7. I-beam movable clamp; 71. Single open rectangular groove; 711. Concave groove; 72. Compression spring. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] As per the instruction manual Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the existing pre-filled syringe 1 sealing process includes a pre-filled syringe 1 after drug addition, an adapter 2 fixed to the injection port of the pre-filled syringe 1, and a Luer lock cap 3 for sealing the injection port of the pre-filled syringe 1. The adapter 2 is connected to the stud end of the Luer lock cap 3 via a threaded structure, and the connection surface between the adapter 2 and the side wall of the injection port of the pre-filled syringe 1 is a frosted surface to increase the stability of the sealing connection. To facilitate the connection of the Luer lock cap 3, current production typically employs automated assembly line production. These pre-filled syringes 1 are connected to the hand pressure plate of the pre-filled syringe 1 via the syringe rotary table 4 and the I-beam movable clamp 7. The top surface of the movable clamp 7 is provided with a concave groove 711 for engaging the hand pressure plate of the pre-filled syringe 1, thereby fixing the pre-filled syringe 1. The open end of the concave groove 711 has a small anti-detachment locking plate. In order to facilitate the adjustment of the height of the pre-filled syringe 1, the rear of the I-shaped movable clamp 7 is provided with a single open rectangular groove 71 that is engaged with the bottom horizontal block of the I-shaped movable clamp 7. A compression spring 72 is provided between the bottom horizontal block of the I-shaped movable clamp 7 and the single open rectangular groove 71 to control the height of the pre-filled syringe 1, thereby ensuring that the Luer lock cap 3 can automatically adjust the position of the pre-filled syringe 1 after being threadedly locked with the adapter 2, thereby preventing the injection port of the pre-filled syringe 1 from falling off the adapter 2.

[0025] To ensure accurate connection between the injection port of the pre-filled syringe 1 inside the adapter 2 and the rubber stopper inside the Luer lock cap 3, a syringe rotary table 4 fixed to the pre-filled syringe 1 assembly line is provided on one side of the pipe of the pre-filled syringe 1. A locking connection mechanism 5 connects the adapter 2 and the Luer lock cap 3 below the pre-filled syringe 1. A Luer lock conveyor belt 6 providing the Luer lock cap 3 is provided on one side of the locking connection mechanism 5. The locking connection mechanism 5 includes a fixed platform 51 at the output end of the Luer lock conveyor belt 6, an electromagnetic lifting rod 52 controlling the up-and-down movement of the Luer lock cap 3, a three-jaw fixing plate 53 above the fixed platform 51, and a convex platform 54 passing through the bottom surface of the three-jaw fixing plate 53. The electromagnetic lifting rod... The output end of 52 is welded with a storage groove 521 for storing the Luer lock cap 3, and the storage groove 521 passes through the bottom surface of the convex platform 54 and the three-jaw fixing plate 53; the Luer lock cap 3 pushed up by the electromagnetic lifting rod 52 is concentrically fixed by the three-jaw fixing plate 53 to ensure that the Luer lock cap 3 and the adapter 2 are on the same center line, and to ensure that when the injection port of the control pre-filled syringe 1 is inserted into the Luer lock cap 3, there will be no misalignment. The convex platform 54 has a support at the bottom, and the support at the bottom of the convex platform 54 is connected to the top surface of the fixing platform 51 by bolt structure, so that the convex platform 54, the three-jaw fixing plate 53 and the fixing platform 51 are integrated and connected, thereby ensuring the stability of the connection of the three-jaw fixing plate 53.

[0026] To ensure uniform rotation of the three-jaw fixing disk 53, a hollow gear column 55 is welded to the bottom of the three-jaw fixing disk 53, which is fitted onto the outer wall of the cylindrical end of the convex platform 54. A drive gear 56 meshing with the hollow gear column 55 is provided on one side of the hollow gear column 55. A servo motor 57 driving the drive gear 56 is provided on the bottom surface of the convex platform 54. The servo motor 57 is connected to the drive gear 56 via a connecting key, and the base of the servo motor 57 is fixed to the convex platform 54 with screws. To facilitate adjustment of the tightness of the three-jaw fixing disk 53, a tightness adjustment motor 531 driving the rotating screw of the three-jaw fixing disk 53 is provided on the side of the three-jaw fixing disk 53. A tightness adjustment fixing plate 532 supporting the tightness adjustment motor 531 is welded to the side of the three-jaw fixing disk 53. The tightness adjustment motor 531 is fixed to the tightness adjustment fixing plate 532 with screws. To ensure the safety of the three-jaw fixing disk 53, the tightness adjustment fixing plate 532 is located above the hollow gear column 55.

[0027] To automate the feeding of the Luer lock cap 3, a pneumatic telescopic rod 61 is provided on one side of the Luer lock conveyor belt 6 to push the Luer lock cap 3. To ensure the stability of the Luer lock cap 3 when pushed by the pneumatic telescopic rod 61, the output end of the pneumatic telescopic rod 61 is provided with a negative pressure fixing plate 611 that adsorbs the outer wall of the Luer lock cap 3. Through the adsorption of negative pressure, it is ensured that the Luer lock cap 3 will not slip out of the limited path when it is displaced. On the opposite side of the pneumatic telescopic rod 61, there is a sliding groove 62 connecting the top surface of the fixed platform 51. On one side of the fixed platform 51, there is a connecting groove 511 connecting the sliding groove 62. The top surface of the connecting groove 511 is located above the output rod of the electromagnetic lifting rod 52. The sliding groove 62 and the connecting groove 511 are the moving path of the Luer lock cap 3. Finally, it falls into the storage groove 521 at the deepest part of the connecting groove 511, which facilitates the connection between the Luer lock cap 3 and the adapter 2.

[0028] In specific implementation, the syringe rotating table 4 is activated to align the injection port of the pre-filled syringe 1 with the center of the three-jaw fixing plate 53 for zero-point calibration. After calibration, the Luer lock conveyor belt 6 is activated for fixed-distance displacement, causing the negative pressure fixing plate 611 at the top of the pneumatic telescopic rod 61 to adhere to the side of the Luer lock cap 3. Then, the Luer lock cap 3 is pushed into the top surface of the connecting groove 511, allowing it to fall into the storage groove 521 below. After resetting the pneumatic telescopic rod 61, the electromagnetic lifting rod 52 is activated to connect the Luer lock cap 3 with the adapter 2. During the connection process, the tightness of the three-jaw fixing plate 53 is gradually adjusted so that the Luer lock cap 3 completes calibration before contacting the adapter 2. After the three-jaw fixing plate 53 is clamped, the top surface of the storage groove 521 is always below the claws of the three-jaw fixing plate 53. Then, the servo motor 57 is started, and the three-jaw fixing plate 53 is driven to rotate through the meshing connection of the hollow gear column 55 and the drive gear 56, thereby completing the threaded connection between the Luer lock cap 3 and the adapter 2. During the connection process, the I-beam movable clamp 7 will gradually press down until the threaded connection between the lock cap 3 and the adapter 2 is completed. Then, the three-jaw fixing plate 53 is released by the tension adjustment motor 531, and the pre-filled syringe 1 is height reset under the action of the compression spring 72, thereby completing the connection between the injection port of the pre-filled syringe 1 and the insertion tube of the Luer lock cap 3.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A cannulation mechanism for a Luer lock cap assembly machine, comprising a pre-filled syringe (1) after drug addition, an adapter (2) fixed to the injection port of the pre-filled syringe (1), and a Luer lock cap (3) sealing the injection port of the pre-filled syringe (1), wherein the adapter (2) is connected to the stud end of the Luer lock cap (3) via a threaded structure, a syringe rotating table (4) for fixing the pre-filled syringe (1) on one side of the pipe is provided, and a locking connection mechanism (5) for the adapter (2) and the Luer lock cap (3) is connected below the pre-filled syringe (1), and a Luer lock conveyor belt (6) for providing the Luer lock cap (3) is provided on one side of the locking connection mechanism (5), characterized in that: The locking connection mechanism (5) includes a fixed platform (51) located at the output end of the Luer lock conveyor belt (6), an electromagnetic lifting rod (52) for controlling the up and down movement of the Luer lock cap (3), a three-jaw fixed plate (53) located above the fixed platform (51), and a convex platform (54) passing through the bottom surface of the three-jaw fixed plate (53). The output end of the electromagnetic lifting rod (52) is welded with a storage groove (521) for storing the Luer lock cap (3), and the storage groove (521) passes through the bottom surface of the convex platform (54) and the three-jaw fixed plate (53). A hollow gear column (55) is welded below the three-jaw fixing plate (53) and sleeved on the outer wall of the cylindrical end of the convex platform (54). A drive gear (56) meshing with the hollow gear column (55) is provided on one side of the hollow gear column (55). A servo motor (57) driving the drive gear (56) is provided on the bottom surface of the convex platform (54). A tension adjustment motor (531) driving the rotating screw of the three-jaw fixing plate (53) is provided on the side of the three-jaw fixing plate (53). The syringe rotating platform (4) is connected to the hand pressure plate of the pre-filled syringe (1) through the I-shaped movable clamp (7), and a single open rectangular groove (71) is provided behind the I-shaped movable clamp (7) and is locked at the end of the bottom horizontal block of the I-shaped movable clamp (7). A compression spring (72) for controlling the height of the pre-filled syringe (1) is provided between the bottom horizontal block of the I-shaped movable clamp (7) and the single open rectangular groove (71).

2. The tube insertion mechanism of the Luer lock cap assembly machine according to claim 1, characterized in that: The Luer lock conveyor belt (6) has a pneumatic telescopic rod (61) on one side to push the Luer lock cap (3), and a sliding groove (62) on the top surface of the fixed platform (51) is provided on the opposite side of the pneumatic telescopic rod (61). A connecting groove (511) is provided on one side of the fixed platform (51) to connect the sliding groove (62), and the top surface of the connecting groove (511) is located above the output rod of the electromagnetic lifting rod (52).

3. The tube insertion mechanism of the Luer lock cap assembly machine according to claim 1, characterized in that: The top surface of the I-beam movable clamp (7) is provided with a concave groove (711) for engaging the hand pressure plate of the pre-filled syringe (1).

4. The tube insertion mechanism of the Luer lock cap assembly machine according to claim 1, characterized in that: The convex platform (54) has a support below it, and the support below the convex platform (54) is connected to the top surface of the fixed platform (51) by a bolt structure.

5. The tube insertion mechanism of a Luer lock cap assembly machine according to claim 1, characterized in that: The side of the three-jaw fixing plate (53) is welded with a tension adjustment fixing plate (532) that supports the tension adjustment motor (531).

6. The tube insertion mechanism of a Luer lock cap assembly machine according to claim 2, characterized in that: The output end of the pneumatic telescopic rod (61) is provided with a negative pressure fixing plate (611) that adsorbs the outer wall of the Luer lock cap (3).

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