Method for assembling pre-filled syringe

Abstract

The invention belongs to the technical field of injector assembly equipment, and provides a pre-potting injector assembly method which comprises the steps that a quantitative ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station are arranged on the periphery of an assembly rotating disc; the assembling turntable drives the clamps to circularly pass through the stations, so that the assembling procedures are annularly connected in series; when the injector is assembled, a quantitative ring is fixedly clamped through a clamp, then a push rod and a piston are sequentially assembled in place at a push rod assembling station and a piston assembling station, and clamping and fixing parts and positions do not need to be switched; and finally, the push rod provided with the quantitative ring and the piston is moved out of the clamp at a sleeve assembling station and is conveniently arranged in the sleeve, so that assembling of one injector is completed, meanwhile, the clamp is vacant and enters a downward moving circulation, two effects are achieved through one step, the assembling process is more concise comprehensively, and then needed equipment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of syringe assembly equipment, and particularly relates to a pre-filled syringe assembly method. Background Art

[0002] Among them, the prefilled syringe is a new type of syringe that loads the drug into the syringe in advance. It usually includes a metering ring, a piston, a push rod and a sleeve. The side of the push rod is provided with an external thread, the inside of the metering ring is provided with an internal thread, the metering ring is screwed onto the push rod, the piston is clamped at the lower end of the push rod, and the push rod is slidably arranged in the sleeve.

[0003] Prefilled syringes save medicine bottles and have high practical value, but they still require a lot of manpower to assemble the quantitative ring, piston, push rod and sleeve before filling the medicine. This is not only inefficient and costly, but also cannot guarantee the sterility requirements of the syringe.

[0004] Some existing assembly methods using mechanical equipment in the prior art usually only assemble two parts separately. During assembly, one part is usually clamped and fixed, and then the other part is manipulated for assembly. In addition, in order to facilitate assembly, different parts are usually clamped and fixed when assembling different parts, resulting in a more cumbersome assembly process of the production line composed of series, a more complex production line, and more equipment required. Summary of the Invention

[0005] The present invention provides a prefilled syringe assembly method, aiming to solve the technical problems described in the above background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is to provide a prefilled syringe assembly method, comprising: An assembly turntable is rotatably provided and a plurality of clamping assemblies are provided on the assembly turntable, and a metering ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station are provided around the assembly turntable; The following steps are also included: S01, transporting the quantitative ring to the quantitative ring assembly station, and installing the quantitative ring into the clamping assembly at the quantitative ring assembly station; S02, transporting the push rod to the push rod assembly station, the assembly turntable drives the clamping assembly equipped with the quantitative ring to move to the push rod assembly station, and installing the push rod into the quantitative ring; S03, transporting the piston to the piston assembly station, the assembly turntable drives the push rod and the metering ring clamping assembly to move to the piston assembly station, and installing the piston on the push rod; S04, transporting the sleeve to the sleeve assembly station, the assembly turntable drives the clamping assembly equipped with the piston, push rod and metering ring to the sleeve assembly station, and the push rod equipped with the piston and the metering ring is removed from the clamping assembly and pushed into the sleeve, completing the assembly of a syringe; S05, the assembly turntable drives the idle clamping assembly to the quantitative ring assembly station, and the cycle repeats.

[0007] In one possible implementation of the prefilled syringe assembly method provided by the present invention, step S02 includes: S02.1. The push rod is transported to the push rod assembly station. The assembly turntable drives the clamping assembly equipped with the metering ring to move to the push rod assembly station. S02.2. Clamp the push rod to the upper side of the quantitative ring, coaxial with the quantitative ring; S02.3, press down and rotate the push rod to screw it into the quantitative ring.

[0008] In a possible implementation of the prefilled syringe assembly method provided by the present invention, step S02 further includes: S02.4, detecting whether the quantitative ring is screwed to the preset position of the push rod, and removing the push rod that is not screwed to the preset position of the push rod.

[0009] In one possible implementation of the prefilled syringe assembly method provided by the present invention, step S03 includes: S03.1. Transport the piston to the piston assembly station. The assembly turntable drives the push rod and metering ring clamping assembly to the piston assembly station. S03.2, press against the top of the push rod and push the piston from the bottom of the push rod to the bottom of the push rod.

[0010] In a possible implementation of the prefilled syringe assembly method provided by the present invention, step S03 further includes: S03.3, detecting whether the piston is inserted into the bottom of the push rod, and alarming when detecting that the piston is not inserted into the bottom of the push rod.

[0011] In a possible implementation of the prefilled syringe assembly method provided by the present invention, in step S02.3, the metering ring is screwed to the middle of the push rod; Step S03 also includes: S03.4, press down again and rotate the push rod to screw the quantitative ring to the top of the push rod.

[0012] In a possible implementation of the prefilled syringe assembly method provided by the present invention, step S03 further includes: S03.5, detecting whether the quantitative ring is screwed to the top of the push rod, and alarming when detecting that the quantitative ring is not screwed to the top of the push rod.

[0013] The beneficial effects of the prefilled syringe assembly method provided by the present invention are as follows: compared with the prior art, the prefilled syringe assembly method provided by the present invention sets a quantitative ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station around an assembly turntable, and the assembly turntable drives the clamp to circulate through each station, connecting each assembly process in series in a ring shape; and when assembling the syringe, the quantitative ring is fixedly clamped by the clamp, and then the push rod and the piston are assembled in place at the push rod assembly station and the piston assembly station in turn, without switching the clamped parts and positions; finally, the push rod equipped with the quantitative ring and the piston is moved out of the clamp at the sleeve assembly station. , and then install it into the sleeve to complete the assembly of a syringe, while leaving the fixture empty and entering the downward cycle. Two effects are achieved in one step, making the assembly process simpler and reducing the required equipment. Therefore, the prefilled syringe assembly method provided by the present invention, by reasonably selecting the clamping and fixed parts and the assembly order, does not need to frequently switch the clamping and fixed parts and positions during the assembly process, making the production line simpler and effectively reducing the required equipment. And when the syringe assembly is completed in the last step, the fixture is emptied so that the fixture can directly enter the next cycle, making the assembly process simpler and further reducing the required equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic flow chart of a method for assembling a prefilled syringe according to an embodiment of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the prefilled syringe assembly equipment provided by the embodiment of the present invention Figure 1 ; Figure 3 for Figure 2 A magnified view of part A in FIG; Figure 4 for Figure 3 A magnified view of part B in FIG; Figure 5 Schematic diagram of the three-dimensional structure of the prefilled syringe assembly equipment provided by the embodiment of the present invention Figure 2 ; Figure 6 for Figure 5 Enlarged view of part C in ; Figure 7 for Figure 6 Enlarged view of part D in FIG; Figure 8 for Figure 5 Enlarged view of part E in FIG; Figure 9 Schematic diagram of the three-dimensional structure of the prefilled syringe assembly equipment provided by the embodiment of the present invention Figure 3 ; Figure 10 for Figure 9 Enlarged view of part F in ; Figure 11 for Figure 9 The enlarged view of the G part in the figure; Figure 12 for Figure 9 The enlarged view of the H part in FIG; Figure 13 for Figure 9 A magnified view of part I in FIG; Figure 14 Schematic diagram of the three-dimensional structure of the prefilled syringe assembly equipment provided by the embodiment of the present invention Figure 4 ; Figure 15 for Figure 14 The enlarged view of the J part in FIG; Figure 16 for Figure 14 Enlarged view of the K part in FIG; Figure 17 for Figure 14 The enlarged view of the L part in FIG; Description of reference numerals: 0101, rotating disc; 0102, fixed frame; 0103, frame; 0104, cam divider; 0210, fixture; 0211, fixed block; 0212, movable block; 0213, guide rod; 0214, return spring; 0220, release assembly; 0221, release cylinder; 0222, release frame; 0310, quantitative ring assembly bracket; 0321, quantitative ring vibration assembly; 0322, quantitative ring transport rack; 0323, quantitative ring vibration plate; 0331, quantitative ring placement rack; 0332, quantitative ring dislocation drive assembly; 0340, quantitative ring gripper; 0350, quantitative ring drive assembly; 0410, first push rod assembly bracket; 0421, push rod placement rack; 0422, push rod push drive assembly; 0430, first push rod drive assembly; 0441, rotary clamping assembly; 0442, push rod assembly frame; 0443, push rod buffer frame; 0444, limit rod; 0445, buffer spring; 0451, push rod vibration assembly; 0452, push rod transport frame; 0453, push rod vibration plate; 0461, first positioning frame; 0462, first positioning drive assembly; 0471, first photoelectric sensor; 0472, first induction block; 0510, Reject drive assembly; 0520, Reject gripper; 0610, piston assembly bracket; 0620, piston placement rack; 0631, push rod push piece; 0632, piston push assembly; 0641, piston vibration assembly; 0642, piston transport rack; 0643, piston vibration plate; 0651, third detection bracket; 0652, third photoelectric sensor; 0710, second push rod assembly bracket; 0720, second push rod drive assembly; 0731, second detection bracket; 0732, second photoelectric sensor; 0810, sleeve assembly bracket; 0821, storage turntable; 0822, retaining ring; 0831, sleeve drive assembly; 0832, sleeve gripper; 0841, sleeve loading rack; 0842, sleeve vibrating plate; 0843, sleeve unloading rack; 0851, second positioning rack; 0852. Second positioning drive assembly; 0860. Sleeve stopper. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0016] The assembling method of the prefilled syringe provided by the present invention is now described.

[0017] like Figure 1 As shown, the prefilled syringe assembly method includes: A rotatably arranged assembly turntable and a plurality of clamping components are arranged on the assembly turntable, and a quantitative ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station are arranged around the assembly turntable.

[0018] The following steps are also included: S01, transporting the quantitative ring to the quantitative ring assembly station, and installing the quantitative ring into the clamping assembly at the quantitative ring assembly station; S02, transporting the push rod to the push rod assembly station, the assembly turntable drives the clamping assembly equipped with the quantitative ring to move to the push rod assembly station, and the push rod is installed in the quantitative ring; S03, transporting the piston to the piston assembly station, the assembly turntable drives the push rod and the metering ring clamping assembly to move to the piston assembly station, and the piston is installed on the push rod; S04, transporting the sleeve to the sleeve assembly station, the assembly turntable drives the clamping assembly equipped with the piston, push rod and metering ring to move to the sleeve assembly station, and the push rod equipped with the piston and metering ring is removed from the clamping assembly and pushed into the sleeve, completing the assembly of a syringe; S05, the assembly turntable drives the empty clamping components to the quantitative ring assembly station, and the cycle repeats.

[0019] It should be noted that the assembly turntable is provided with multiple clamping assemblies so that each process can be carried out synchronously to improve assembly efficiency; the clamping assemblies clamp one, two or more quantitative rings side by side in sequence; and the assembly of the push rod and the piston is completed synchronously.

[0020] The beneficial effects of the prefilled syringe assembly method provided by the present invention are as follows: compared with the prior art, the prefilled syringe assembly method provided by the present invention sets a quantitative ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station around the assembly turntable, and the assembly turntable drives the clamping assembly to circulate through each station, connecting each assembly process in a ring-shaped series; and when assembling the syringe, the quantitative ring is fixedly clamped by the clamping assembly, and then the push rod and the piston are assembled in place at the push rod assembly station and the piston assembly station in turn, without switching the clamping fixed parts and positions; finally, the push rod equipped with the quantitative ring and the piston is moved out of the clamping assembly at the sleeve assembly station The parts are clamped and fixed, and then installed into the sleeve to complete the assembly of a syringe. At the same time, the clamping component is emptied and enters the downward movement cycle. Two effects are achieved in one step, making the assembly process more concise and reducing the required equipment. Therefore, the prefilled syringe assembly method provided by the present invention, by reasonably selecting the parts to be clamped and fixed and the assembly order, does not need to frequently switch the clamped and fixed parts and positions during the assembly process, making the production line more concise and effectively reducing the required equipment. And when the syringe assembly is completed in the last step, the clamp can directly enter the next cycle and empty the clamping component, making the assembly process more concise and further reducing the required equipment.

[0021] like Figures 2 to 17As shown, an embodiment of the present invention provides a prefilled syringe assembly device for implementing the above-mentioned assembly method. The assembly device includes an assembly turntable, a clamping assembly, a quantitative ring assembly assembly, a push rod assembly assembly, a first push rod detection assembly, a piston assembly assembly and a sleeve assembly assembly. The assembly turntable is arranged to rotate intermittently, and a quantitative ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station are arranged circumferentially on the assembly turntable; the clamping assembly is fixedly connected to the assembly turntable for clamping the quantitative ring; the quantitative ring assembly assembly is arranged at the quantitative ring assembly station, and is used to place the quantitative ring into the clamping assembly located at the quantitative ring assembly station the push rod assembly component is provided at the push rod assembly station, and is used to install the push rod into the quantitative ring in the clamping component located at the push rod assembly station; the first push rod detection component is provided at the push rod assembly station, and is used to detect whether the push rod is assembled in place, and after detecting that the push rod is assembled in place, the push rod assembly component stops operation; the quantitative ring is assembled into a preset position on the push rod; the piston assembly component is provided at the piston assembly station, and is used to install the piston into the push rod on the clamping component located at the piston assembly station; the sleeve assembly component is provided at the sleeve assembly station, and is used to install the push rod on the clamping component located at the sleeve assembly station into the sleeve.

[0022] In a specific implementation of the prefilled syringe assembly method provided in an embodiment of the present invention, step S02 includes: S02.1. The push rod is transported to the push rod assembly station. The assembly turntable drives the clamping assembly equipped with the metering ring to move to the push rod assembly station. S02.2. Clamp the push rod to the upper side of the quantitative ring, coaxial with the quantitative ring; S02.3. Press down and rotate the push rod to screw it into the quantitative ring.

[0023] Furthermore, in a specific implementation of the prefilled syringe assembly method provided in an embodiment of the present invention, step S02 further includes: S02.4, check whether the quantitative ring is screwed to the preset position of the push rod, and remove the push rod that is not screwed to the preset position of the push rod.

[0024] It should be noted that a first photoelectric sensor 0471 is set at a preset distance below the quantitative ring of the push rod assembly station. Whether the quantitative ring is screwed to the preset position of the push rod is detected by whether the first photoelectric sensor 0471 is blocked. After detecting that the quantitative ring is screwed to the preset position of the push rod, the rotation of the push rod is stopped; and if it is not detected that the quantitative ring is not screwed to the preset position of the push rod within the preset time, it is considered that the push rod is not accurately screwed into the quantitative ring. Thereafter, the push rod is discarded to ensure the quality of the finished product.

[0025] Specifically, the preset time is set based on experience and actual conditions. In this embodiment, the preset time is 1 second.

[0026] In a specific implementation of the prefilled syringe assembly method provided in an embodiment of the present invention, step S03 includes: S03.1. Transport the piston to the piston assembly station. The assembly turntable drives the push rod and metering ring clamping assembly to the piston assembly station. S03.2. Press against the top of the push rod to prevent it from moving and insert the piston from the underside of the push rod to the bottom of the push rod.

[0027] In a specific implementation of the prefilled syringe assembly method provided in an embodiment of the present invention, step S03 further includes: S03.3, detect whether the piston is inserted into the bottom of the push rod, and alarm when it is detected that the piston is not inserted into the bottom of the push rod to ensure the quality of the finished product.

[0028] Specifically, a third photoelectric sensor 0652 is set on the lower side of the assembly turntable. If the piston is not installed on the lower end of the push rod, the piston cannot block the third photoelectric sensor 0652. At this time, the third photoelectric sensor 0652 determines that the piston is not installed on the push rod, and then controls the alarm device to sound an alarm.

[0029] In a specific embodiment of the prefilled syringe assembly method provided in an embodiment of the present invention, in step S02.3, the metering ring is screwed to the middle of the push rod; Step S03 also includes: S03.4, turn forward to the preset angle, press down and rotate the push rod again, and screw the quantitative ring to the top of the push rod.

[0030] It should be noted that by screwing the dosing ring to the top of the push rod twice at two positions, the push rod can be screwed at two positions at the same time, which effectively reduces assembly time and improves assembly efficiency. In a specific embodiment of the prefilled syringe assembly method provided by an embodiment of the present invention, step S03 also includes: S03.5, detects whether the quantitative ring is screwed to the top of the push rod, and alarms when the quantitative ring is not screwed to the top of the push rod to effectively ensure product quality.

[0031] Specifically, a second photoelectric sensor 0732 is set on the upper side of the clamping assembly. By detecting the distance from the second photoelectric sensor 0732 to the end of the push rod when the push rod passes under the second photoelectric sensor 0732, it is determined whether the quantitative ring is screwed to the top of the push rod.

[0032] like Figure 2 As shown, the assembled turntable includes a rotating disk body 0101 and a fixed frame 0102 . The rotating disk body 0101 is arranged to rotate intermittently, and the fixed frame 0102 is arranged on the upper side of the rotating disk body 0101 and is spaced apart from the rotating disk body 0101 .

[0033] like Figure 2 and Figure 5 As shown, the assembled turntable also includes a frame 0103 and a cam divider 0104, the frame 0103 is fixed; the cam divider 0104 is connected to the frame 0103, and the cam divider 0104 is provided with an inner ring and an outer ring, the inner ring is fixed, and the outer ring is used to output power.

[0034] The rotating disc 0101 is connected to the inner ring of the cam divider 0104 , and the fixed frame 0102 is connected to the outer ring of the cam divider 0104 .

[0035] It should be noted that the cam divider 0104 is an existing desktop cam divider 0104.

[0036] like Figure 2 and Figure 3 As shown, the apparatus further includes at least two release assemblies 0220, each of which is provided at the dosing ring assembly station and the sleeve assembly station. These release assemblies 0220 are connected to the fixed frame 0102 and are used to release the dosing ring from the clamping assembly 0210. Several clamping assemblies 0210 are spaced apart along the circumference of the assembly turntable and connected to the rotating disk body 0101. Each clamping assembly 0210 has one, two, or more elastic clamping positions for clamping the dosing ring.

[0037] Specifically, the clamping assembly 0210 is provided with two elastic clamping positions to synchronously complete the assembly of two syringes and ensure assembly efficiency.

[0038] It should be noted that the fixing frame 0102 is a disc, and can also be a frame structure, as long as it meets the installation requirements of the release component 0220.

[0039] When the quantitative ring is placed in the elastic clamping position or the push rod equipped with the quantitative ring is moved out of the elastic clamping position, the quantitative ring is released by the release component 0220 to facilitate its removal.

[0040] like Figure 2 and Figure 3As shown, the clamping assembly 0210 includes a fixed block 0211, a movable block 0212, a plurality of guide rods 0213, and a plurality of return springs 0214. The fixed block 0211 is fixedly mounted on the assembly turntable, with a plurality of first half holes provided on one side, first half slots provided on both sides of the first half holes, and the first half slots are connected to the first half holes; the movable block 0212 is disposed on one side of the fixed block 0211, and a plurality of second half holes are provided on the side of the movable block 0212 facing the fixed block 0211, second half slots provided on both sides of the second half holes, the second half holes correspond one-to-one with the first half holes and are aligned to form an elastic clamping position, and the second half slots correspond one-to-one with the first half slots and are aligned. An avoidance groove is formed to avoid various clamping claws so that the clamping claws can clamp the quantitative ring; a number of guide rods 0213 are arranged in parallel and at intervals on the side of the movable block 0212 facing the fixed block 0211, and each guide rod 0213 passes through the fixed block 0211 and slides with the fixed block 0211; one end of the guide rod 0213 is connected to the movable block 0212, and the other end is provided with a stop block; a number of return springs 0214 are arranged on the side of the fixed block 0211 facing away from the movable block 0212, one-to-one corresponding to the guide rod 0213 and sleeved on the guide rod 0213, one end of the return spring 0214 abuts against the fixed block 0211, and the other end abuts against the stop block.

[0041] Specifically, two first half holes are provided on the fixed block 0211, and two second half holes are correspondingly provided on the movable block 0212; two guide rods 0213 are provided on the side of the movable block 0212 facing the fixed block 0211, and two return springs 0214 are respectively mounted on the two guide rods 0213 to effectively limit the sliding direction of the movable block 0212.

[0042] The release assembly 0220 includes a release cylinder 0221 and a release frame 0222. The release cylinder 0221 is fixedly connected to the fixed frame 0102; the release frame 0222 is connected to the power output end of the release cylinder 0221 to push the guide rod 0213.

[0043] It should be noted that release cylinder 0221 is an existing pneumatic cylinder and can also be replaced by a hydraulic or electric push rod. Release frame 0222 is provided with a push rod or a whole flat plate corresponding to guide rod 0213 on the side facing clamping assembly 0210. When clamping assembly 0210 needs to release the quantitative ring, release cylinder 0221 drives release frame 0222 to move toward clamping assembly 0210, pushing guide rod 0213, causing movable block 0212 to move against fixed block 0211, releasing the quantitative ring; then, release cylinder 0221 drives release frame 0222 to reset, and movable block 0212 automatically resets under the action of reset spring 0214.

[0044] like Figure 3 and Figure 4As shown, the quantitative ring assembly component includes a quantitative ring placement component and a quantitative ring assembly component. The quantitative ring placement component is used to place the quantitative ring to be assembled; the quantitative ring assembly component includes a quantitative ring gripper 0340 and a quantitative ring drive component 0350. The power output end of the quantitative ring drive component 0350 is connected to the quantitative ring gripper 0340, which is used to drive the quantitative ring gripper 0340 to grab the quantitative ring from the quantitative ring placement component and place it into the clamping component located at the quantitative ring assembly station.

[0045] It should be noted that the quantitative ring gripper 0340 is an existing two-finger cylinder gripper, which can also be replaced by an electric gripper or a hydraulic gripper that can clamp the quantitative ring, and a claw that matches the quantitative ring can be installed at the end to facilitate grabbing the quantitative ring.

[0046] like Figures 2 to 4 As shown, the quantitative ring assembly component also includes a quantitative ring assembly bracket 0310 and a quantitative ring transport component. The quantitative ring assembly bracket 0310 is fixedly connected to the frame 0103; the quantitative ring transport component is used to transport the quantitative ring to the quantitative ring placement component.

[0047] Among them, the quantitative ring transport assembly includes a quantitative ring vibration assembly 0321, a quantitative ring transport frame 0322 and a quantitative ring vibration disk 0323. The quantitative ring vibration assembly 0321 is connected to the quantitative ring assembly bracket 0310; the quantitative ring transport frame 0322 is connected to the vibration assembly, and a plurality of quantitative ring track grooves are provided on the quantitative ring transport frame 0322. The quantitative ring is suitable for sliding along the quantitative ring track grooves. The quantitative ring vibration assembly 0321 is used to drive the quantitative ring transport frame 0322 to vibrate; the quantitative ring vibration disk 0323 is docked with the quantitative ring transport frame 0322 to transport the quantitative ring to the quantitative ring transport frame 0322.

[0048] Specifically, the quantitative ring vibration assembly 0321 is an existing direct vibration feeder. The bottom of the direct vibration feeder is connected to the quantitative ring assembly bracket 0310, and the top is connected to the quantitative ring transport frame 0322. It is used to vibrate the quantitative ring transport frame 0322, thereby driving the quantitative ring forward. The quantitative ring vibration disk 0323 is an existing vibration disk that can automatically sort the quantitative rings and send the quantitative rings to the quantitative ring transport frame 0322. A 2-5mm gap is provided between the quantitative ring vibration disk 0323 and the quantitative ring transport frame 0322 to prevent mutual interference of vibrations. The quantitative ring transport frame 0322 is provided with two quantitative ring track grooves.

[0049] like Figure 4As shown, the quantitative ring placement component includes a quantitative ring placement rack 0331 and a quantitative ring dislocation drive component 0332. The quantitative ring placement rack 0331 is slidably matched with the quantitative ring assembly bracket 0310, and is arranged at the end of the quantitative ring track groove, and has the freedom to slide in a direction perpendicular to the conveying direction of the end of the quantitative ring track groove; the quantitative ring placement rack 0331 is provided with a plurality of quantitative ring storage slots on the side facing the quantitative ring track groove; the quantitative ring storage slots correspond to the quantitative ring track grooves one by one, and when the quantitative ring storage slots are aligned with the quantitative ring track grooves, the quantitative ring in the quantitative ring track groove slides into the quantitative ring storage slots; the quantitative ring dislocation drive component 0332 is connected to the quantitative ring assembly bracket 0310, and the power output end is connected to the quantitative ring placement rack 0331, which is used to drive the quantitative ring placement rack 0331 to slide along the quantitative ring assembly bracket 0310.

[0050] It should be noted that the quantitative ring placement rack 0331 is provided with two quantitative ring storage slots, and the quantitative ring dislocation drive assembly 0332 is a pneumatic cylinder, but may also be a hydraulic cylinder, an electric push rod, or other devices. The quantitative ring placement rack 0331 slides with the quantitative ring assembly bracket 0310 via a slide rail. After the quantitative ring slides into the quantitative ring storage slot on the quantitative ring placement rack 0331, the quantitative ring dislocation drive assembly 0332 drives the quantitative ring storage slot on the quantitative ring placement rack 0331 to dislocate with the quantitative ring track slot, thereby preventing the quantitative ring in the quantitative ring storage slot from being squeezed by the quantitative ring in the quantitative ring track slot, resulting in a grasping failure.

[0051] like Figures 5 to 8 、 Figure 10 As shown, the push rod assembly assembly includes a first push rod assembly bracket 0410, a push rod placement assembly, a first push rod drive assembly 0430 and a push rod assembly assembly. The first push rod assembly bracket 0410 is fixed; the push rod placement assembly is arranged outside the push rod assembly station, and is used to store the push rod to be assembled; the first push rod drive assembly 0430 is connected to the first push rod assembly bracket 0410; the push rod assembly assembly is connected to the power output end of the first push rod drive assembly 0430, and is used to move between the push rod placement assembly and the quantitative ring located at the push rod assembly station under the drive of the first push rod drive assembly 0430. The push rod assembly assembly is provided with a rotating clamping assembly 0441, which is used to clamp the push rod and drive the push rod to rotate.

[0052] It should be noted that the rotary clamping assembly 0441 is composed of an existing rotary gripper and a motor assembly. The rotary gripper is an existing 360-degree infinitely rotating air gripper and a claw matching the push rod is installed at the end to clamp the push rod; the motor assembly is an existing ordinary motor, stepper motor or private service motor, which is used to drive the rotary gripper to rotate.

[0053] like Figure 5 and Figure 6As shown, the push rod assembly component also includes a push rod transport component; the push rod transport component includes a push rod vibration component 0451, a push rod transport frame 0452 and a push rod vibration disk 0453, and the push rod vibration component 0451 is connected to the first push rod assembly bracket 0410; the push rod transport frame 0452 is connected to the vibration component, and a plurality of push rod track grooves are provided on the push rod transport frame 0452, and the upper end of the push rod is clamped in the push rod track groove and is suitable for sliding along the push rod track groove, and the push rod vibration component 0451 is used to drive the push rod transport frame 0452 to vibrate; the push rod vibration disk 0453 is docked with the push rod transport frame 0452 and is used to transport the push rod to the push rod transport frame 0452.

[0054] It should be noted that push rod vibration assembly 0451 is a conventional direct vibration feeder. Its bottom is connected to the push rod assembly bracket and its top is connected to push rod transport rack 0452. This vibrates push rod transport rack 0452, thereby driving the push rods forward. Push rod vibration disk 0453 is a conventional vibration disk that automatically sorts the push rods and delivers them to push rod transport rack 0452. A 2-5mm gap is provided between push rod vibration disk 0453 and push rod transport rack 0452 to prevent vibration interference. Push rod transport rack 0452 is equipped with two push rod track grooves. These grooves are T-shaped, matching the top of the push rods.

[0055] like Figure 5 and Figure 8 As shown, the push rod placement assembly includes a push rod placement rack 0421 and a push rod pushing drive assembly 0422. The push rod placement rack 0421 is arranged at the end of the push rod track groove and is fixed to the first push rod assembly bracket 0410. The push rod placement rack 0421 is provided with a plurality of push rod storage grooves on the side facing the push rod track groove; the push rod storage grooves correspond to and are aligned with the push rod track grooves one by one, and the push rods in the push rod track grooves slide into the push rod storage grooves; the push rod pushing drive assembly 0422 is arranged on the lower side of the push rod placement rack 0421, and is used to push the push rods in the push rod placement rack 0421 upward.

[0056] Specifically, the push rod pushing drive assembly 0422 is a cylinder, and can also be a hydraulic cylinder, an electric push rod, etc. When there is one push rod storage slot, the push rod can be directly pushed by the cylinder. When there are two or more push rod storage slots, a top plate needs to be installed at the end of the cylinder to lift all the push rods at the same time to facilitate the rotation of the clamping assembly 0441 to clamp the push rod.

[0057] like Figure 6 and Figure 7As shown, the push rod assembly assembly also includes a push rod assembly frame 0442, a push rod buffer frame 0443 and a plurality of buffer assemblies. The push rod assembly frame 0442 is connected to the first push rod drive assembly 0430 or the power output end of the first push rod drive assembly 0430, and is used to move under the drive of the first push rod drive assembly 0430; the push rod buffer frame 0443 is slidably matched with the push rod assembly frame 0442, and has the freedom to slide up and down relative to the push rod assembly frame 0442; the plurality of buffer assemblies The punch assembly is arranged between the push rod assembly frame 0442 and the push rod buffer frame 0443; the buffer assembly includes a limit rod 0444 and a buffer spring 0445, the limit rod 0444 passes through the push rod buffer frame 0443, and both ends are connected to the push rod assembly frame 0442; the buffer spring 0445 is sleeved on the limit rod 0444, and both ends are respectively abutted against the push rod assembly frame 0442 and the push rod buffer frame 0443; wherein, the rotating clamping assembly 0441 is connected to the push rod buffer frame 0443.

[0058] Specifically, two buffer assemblies are provided on the push rod assembly frame 0442. Further, such as Figure 7 、 Figure 10 and Figure 12 As shown, in a specific embodiment of the prefilled syringe assembly device provided by an embodiment of the present invention, the push rod assembly assembly also includes a first positioning assembly, the first positioning assembly includes two first positioning frames 0461 and a first positioning drive assembly 0462, and positioning half holes are provided on opposite sides of the two first positioning frames 0461 to form a positioning hole, which is coaxial with the quantitative ring on the lower side and is used to make the push rod coaxial with the quantitative ring; the power output end of the first positioning drive assembly 0462 is connected to the two first positioning frames 0461 to drive the two first positioning frames 0461 to move toward or away from each other.

[0059] Specifically, the first positioning drive component 0462 is a pneumatic finger cylinder, and can also be replaced by two cylinders, hydraulic cylinders, electric clamps, etc., which can drive the two first positioning frames 0461 to move toward or away from each other, so as to make the push rod and the quantitative ring coaxial, reduce the probability of the push rod being screwed into the quantitative ring, and ensure assembly efficiency.

[0060] like Figure 6 and Figure 11 As shown, in a specific embodiment of the prefilled syringe assembly equipment provided by an embodiment of the present invention, the push rod assembly assembly includes two push rod assembly assemblies, and also includes a second push rod assembly bracket 0710 and a second push rod drive assembly 0720. The second push rod assembly bracket 0710 is fixed between the piston assembly station and the sleeve assembly station; the second push rod drive assembly 0720 is connected to the second push rod assembly bracket 0710.

[0061] Among them, the two push rod assembly components are respectively connected to the power output ends of the first push rod driving component 0430 and the second push rod driving component 0720; the second push rod driving component 0720 is used to drive the push rod assembly component to move up and down.

[0062] It should be noted that two push rod assembly components are set up, and the quantitative ring is assembled to the top of the push rod twice at two positions. The push rod can be screwed at two positions at the same time, which effectively reduces the assembly time and improves the assembly efficiency.

[0063] like Figure 9 and Figure 11 As shown, in a specific embodiment of the prefilled syringe assembly equipment provided by an embodiment of the present invention, it also includes a first push rod detection component and a rejection component. The first push rod detection component is arranged at the push rod assembly station to detect whether the push rod is assembled in place; a push rod rejection station is provided between the push rod assembly station and the piston assembly station; the rejection component is arranged at the push rod rejection station to reject the push rod that is not assembled in place; the clamping component includes three release components 0220, and the three release components 0220 are respectively arranged at the quantitative ring assembly station, the push rod rejection station and the sleeve assembly station.

[0064] like Figure 7 As shown, in a specific implementation of the prefilled syringe assembly equipment provided by an embodiment of the present invention, the first push rod detection assembly includes a first photoelectric sensor 0471 and a first sensing block 0472, the first photoelectric sensor 0471 is fixedly connected to the push rod assembly frame 0442; the first sensing block 0472 is fixedly connected to the push rod buffer frame 0443; the rejection assembly includes a rejection gripper 0520 and a rejection drive assembly 0510, the rejection gripper 0520 is used to clamp the push rod; the rejection drive assembly 0510 is used to drive the rejection gripper 0520 to move.

[0065] It should be noted that, when the quantitative ring is assembled to the preset position on the push rod, if the first push rod detection component does not detect that the quantitative ring is not assembled to the preset position of the push rod within the preset time, it is considered that the push rod is not accurately screwed into the quantitative ring. When it is transferred to the push rod rejection station, the rejection drive component 0510 drives the rejection gripper 0520 to clamp the push rod that is not accurately screwed into the quantitative ring, and the release component 0220 controls the clamping component 0210 to release the quantitative ring. The rejection drive component 0510 drives the rejection gripper 0520 that clamps the push rod to leave the clamping component 0210 and release the push rod to reject the push rod to ensure the quality of the finished product.

[0066] The rejection gripper 0520 is an existing two-finger cylinder gripper, which can also be replaced by an electric gripper or a hydraulic gripper that can clamp the push rod, and a claw matching the push rod is installed at the end to facilitate clamping the push rod.

[0067] Specifically, the preset time is set based on experience and actual conditions. In this embodiment, the preset time is 1 second; the preset position refers to the middle of the push rod.

[0068] The push rod is not screwed into the quantitative ring accurately. Usually, the external thread on the push rod and the internal thread on the quantitative ring are misaligned, resulting in the quantitative ring being screwed into the push rod only a small distance.

[0069] like Figure 14 and Figure 17 As shown, in a specific embodiment of the prefilled syringe assembly device provided by an embodiment of the present invention, the push rod assembly assembly further includes a second push rod detection assembly, which is disposed between the second push rod assembly bracket 0710 and the sleeve assembly assembly and is used to detect whether the push rod is properly assembled. "Assembled properly" here means that the dosing ring is assembled to the top of the push rod.

[0070] Specifically, the second push rod detection assembly includes a second detection bracket 0731 and a second photoelectric sensor 0732. The second detection bracket 0731 is fixedly connected to the frame 0103; the second photoelectric sensor 0732 is arranged on the upper side of the push rod and connected to the second detection bracket 0731.

[0071] It should be noted that the second photoelectric sensor 0732 determines whether the quantitative ring is screwed to the top of the push rod by detecting the distance from the top of the push rod.

[0072] During assembly, the first push rod drive assembly 0430 first drives the rotary clamping assembly 0441 to move, so that the push rod and the quantitative ring are coaxial; then, the first push rod drive assembly 0430 drives the rotary clamping assembly 0441 to move downward, the push rod and the quantitative ring are pressed, and the buffer spring 0445 is compressed, so that a certain pressure is between the push rod and the quantitative ring; the rotary clamping assembly 0441 drives the push rod to rotate and screw the push rod into the quantitative ring until the quantitative ring is in the middle of the push rod; at this time, the first sensing block 0472 blocks the first photoelectric sensor 0471, and is detected by the first photoelectric sensor 0471, indicating that the quantitative ring is assembled in place, and then the rotary clamping assembly 0441 is controlled to stop rotating, and all components are reset, and the rotating disk 0101 drives it to move to the piston assembly station. At the same time, if the first photoelectric sensor 0471 does not sense the first sensing block 0472 within the preset time, it is considered that the push rod is not correctly screwed into the quantitative ring, and the push rod is rejected when it moves to the rejection station.

[0073] like Figure 11 、 Figure 14 and Figure 15As shown, the piston assembly component includes a piston placement rack 0620 and a piston assembly component. The piston placement rack 0620 is located outside the piston assembly station and is used to store the piston to be assembled; the piston assembly component includes a push rod pushing member 0631 and a piston pushing assembly 0632. The push rod pushing member 0631 is located on the upper side of the assembly turntable and is suitable for abutting against the top of the push rod to press the push rod to prevent the push rod from moving upward when assembling the piston; the piston pushing assembly 0632 is located on the lower side of the piston placement rack 0620 and is used to push the piston placement assembly upward.

[0074] It should be noted that the push rod pushing member 0631 and the piston pushing assembly 0632 are cylinders, and can also be hydraulic cylinders, electric push rods and other devices.

[0075] like Figure 15 As shown, it also includes a piston detection component, which is located between the piston assembly station and the sleeve assembly station; the piston detection component includes a third detection bracket 0651 and a third photoelectric sensor 0652. The third detection bracket 0651 is fixed, and the third photoelectric sensor 0652 is located on the lower side of the assembly turntable and is connected to the third detection to detect whether the piston is installed in the lower end of the push rod.

[0076] It should be noted that after the piston is installed on the lower end of the push rod, the piston will block the third photoelectric sensor 0652. If the piston is not installed on the lower end of the push rod, the piston cannot block the third photoelectric sensor 0652. At this time, the third photoelectric sensor 0652 determines that the piston is not installed on the push rod, and then controls the alarm device to sound an alarm.

[0077] like Figure 15 As shown, the piston assembly component also includes a piston assembly bracket 0610 and a piston transportation component, and the piston assembly bracket 0610 is fixedly arranged.

[0078] The piston transport assembly includes a piston vibration assembly 0641, a piston transport frame 0642 and a piston vibration plate 0643. The piston vibration assembly 0641 is connected to the piston assembly bracket 0610; the piston transport frame 0642 is connected to the vibration assembly. The piston transport frame 0642 is provided with a plurality of piston track grooves, and the piston is suitable for sliding along the piston track grooves. The piston vibration assembly 0641 is used to drive the piston transport frame 0642 to vibrate; the piston vibration plate 0643 is docked with the piston transport frame 0642 and is used to transport the piston to the piston transport frame 0642.

[0079] Among them, the piston placement rack 0620 is arranged at the end of the piston track groove and is connected to the power output end of the piston pushing assembly 0632. The piston placement rack 0620 is provided with a plurality of piston storage grooves on the side facing the piston track groove; the piston storage grooves correspond to and are aligned with the piston track grooves one by one, and the piston in the piston track groove slides into the piston storage groove.

[0080] Specifically, piston vibration assembly 0641 is a conventional direct vibration feeder. Its bottom is connected to piston assembly bracket 0610 and its top is connected to piston transport rack 0642. This vibrates piston transport rack 0642, thereby driving the piston forward. Piston vibration plate 0643 is a conventional vibration plate that automatically sorts the pistons and delivers them to piston transport rack 0642. A 2-5mm gap is provided between piston vibration plate 0643 and piston transport rack 0642 to prevent vibration interference. Piston transport rack 0642 is equipped with two piston track grooves.

[0081] like Figure 13 and Figure 16 As shown, the sleeve assembly component includes a sleeve placement component and a sleeve assembly component. The sleeve placement component is located outside the sleeve assembly station and is used to place the sleeve to be assembled; the sleeve assembly component includes a sleeve gripper 0832 and a sleeve drive component 0831. The power output end of the sleeve drive component 0831 is connected to the sleeve gripper 0832, which is used to drive the sleeve gripper 0832 to grab the push rod equipped with a metering ring and a piston from the sleeve assembly station and press it into the sleeve.

[0082] Specifically, the sleeve grippers 0832 correspond one-to-one to the elastic clamping positions on the clamping assembly 0210, and two sleeve grippers 0832 are provided to complete the assembly of two sleeves at one time.

[0083] Furthermore, more elastic clamping positions can be provided on the clamping assembly 0210, and the same number of sleeve grippers 0832 can be provided accordingly, so as to complete the assembly of multiple sleeves at one time.

[0084] like Figure 9 and Figure 13 As shown, the sleeve assembly component also includes a sleeve assembly bracket 0810 and a sleeve transport component. The sleeve assembly bracket 0810 is fixed; the sleeve transport component is used to transport the sleeve to the sleeve placement component.

[0085] Among them, the sleeve transport assembly includes a sleeve loading rack 0841 and a sleeve vibration plate 0842. The sleeve loading rack 0841 is connected to the sleeve assembly bracket 0810. The sleeve loading rack 0841 is provided with a sleeve loading track groove, and the sleeve is suitable for sliding along the sleeve loading track groove; the sleeve vibration plate 0842 is docked with the sleeve loading rack 0841 to transport the sleeve to the sleeve loading rack 0841.

[0086] It should be noted that the sleeve loading rack 0841 is equipped with two parallel plates or rods spaced apart. The space between the plates or rods is the sleeve loading track groove. The sleeve body is placed in the sleeve loading track groove, and the wings on both sides of the sleeve top are mounted on the sleeve loading rack 0841. The sleeve vibrating plate 0842 is a conventional vibrating plate that can automatically sort the sleeves and send them to the sleeve transport rack.

[0087] like Figure 13 As shown, the sleeve assembly assembly also includes a second positioning assembly, which includes two second positioning frames 0851 and a second positioning drive assembly 0852. The two second positioning frames 0851 are each provided with a second positioning half hole on the opposite side to form a second positioning hole. The second positioning hole is coaxial with the sleeve on the lower side and is used to make the push rod coaxial with the sleeve; the power output end of the second positioning drive assembly 0852 is connected to the two second positioning frames 0851 to drive the two second positioning frames 0851 to move toward or away from each other.

[0088] Specifically, a second positioning hole is provided on the second positioning frame 0851, and each second positioning component positions a push rod; the second positioning drive component 0852 is a 180-degree pneumatic finger cylinder, also known as a 180-degree opening and closing type clamp, and can also be replaced by a pneumatic finger cylinder, two cylinders, a hydraulic cylinder, an electric clamp, etc., which can drive the two second positioning frames 0851 to move toward or away from each other.

[0089] When multiple push rods are assembled at the same time, multiple second positioning assemblies can be provided to position the push rods respectively; multiple second positioning half holes can also be provided on the second positioning frame 0851 to position the multiple push rods.

[0090] like Figure 13 As shown, the sleeve placement assembly includes a storage turntable 0821, a turntable drive assembly and a retaining ring 0822. The storage turntable 0821 is rotatably matched with the sleeve assembly bracket 0810, and the storage turntable 0821 is provided with a plurality of sleeve placement grooves along the circumference; the storage turntable 0821 is provided with a loading position and an unloading position on the side along the circumference, and the sleeve loading rack 0841 is provided at the loading position and docked with the sleeve placement groove on the storage turntable 0821 located at the loading position; the turntable drive assembly is connected to the sleeve assembly bracket 0810, and the power output end is connected to the storage turntable 0821, so as to drive the storage turntable 0821 to rotate intermittently; the retaining ring 0822 is arranged around the outside of the storage turntable 0821, and is fixedly connected to the sleeve assembly bracket 0810, so as to cooperate with the sleeve placement groove to form a closed groove; the retaining ring 0822 is provided with a notch, and the loading position and the unloading position are both provided in the notch; Among them, the sleeve loading rack 0841 is arranged to be tilted upward away from the side of the storage turntable 0821.

[0091] Specifically, the sleeve placement groove on the storage turntable 0821 is a U-shaped groove and is closed by a retaining ring 0822.

[0092] like Figure 13 As shown, the sleeve transport assembly also includes a sleeve unloading rack 0843, which is arranged at the unloading position and has a unloading track groove. One end of the sleeve unloading rack 0843 is arranged at the lower side of the storage turntable 0821 to receive the sleeve on the storage turntable 0821, and the other end is arranged to be tilted downward.

[0093] It should be noted that during operation, the sleeve is transported to the sleeve loading rack 0841 by the vibrating disk, and slides along the sleeve loading rack 0841 to the loading position on the side of the storage turntable 0821. Whenever the sleeve placement groove is aligned with the loading track groove, the sleeve automatically slides into the sleeve placement groove and rotates with the storage turntable 0821 to the sleeve assembly station; during this process, the sleeve drive assembly 0831 drives the sleeve gripper 0832 to grab the push rod in the clamping assembly 0210, and moves to the upper side of the sleeve at the sleeve assembly station; then the push rod is pressed into the sleeve to complete the assembly of the syringe; then, the storage turntable 0821 continues to rotate, driving the transferred syringe to the unloading position, and the syringe slides along the unloading track groove to the next process.

[0094] like Figure 13 As shown, the sleeve transport assembly also includes a sleeve stopper 0860, which is arranged at the end of the sleeve loading rack 0841. The end of the sleeve stopper 0860 is suitable for extending into the sleeve or being placed outside the sleeve to prevent the sleeve from moving toward the storage turntable 0821.

[0095] Specifically, the sleeve stopper 0860 is a cylinder, and can also be a device such as a hydraulic cylinder, an electric push rod, etc. that can output axial displacement. When it is necessary to stop the sleeve from moving downward, the cylinder piston rod extends to block the sleeve.

[0096] like Figure 16 As shown, the sleeve gripper 0832 is a negative pressure suction cup, which is used to absorb the top of the push rod and grasp the push rod.

[0097] It should be noted that the negative pressure suction cup is an existing device, which is used to grab the push rod by sucking the top of the push rod through negative pressure.

[0098] In addition, the sleeve gripper 0832 can also be an existing pneumatic clamp, electric clamp, or other device that can clamp the top of the push rod.

[0099] It should be noted that the quantitative ring drive assembly 0350, the rejection drive assembly 0510, the first push rod drive assembly 0430 and the sleeve drive assembly 0831 all include a fixed mounting frame, a first sliding frame, a second sliding frame, a transverse drive assembly and a longitudinal drive assembly. The first sliding frame is slidably matched with the fixed mounting frame and has the freedom of transverse sliding; the second sliding frame is slidably matched with the first sliding frame and has the freedom of sliding in the vertical direction relative to the first sliding frame; the transverse drive assembly is fixedly connected to the fixed mounting frame, and the power output end is connected to the first sliding frame to drive the first sliding frame to move transversely; the longitudinal drive assembly is fixedly connected to the first sliding frame, and the power output end is connected to the second sliding frame to drive the second sliding frame to slide in the vertical direction relative to the first sliding frame.

[0100] Among them, the second sliding frame is the power output end of the quantitative ring drive assembly 0350, the rejection drive assembly 0510, the first push rod drive assembly 0430 and the sleeve drive assembly 0831; the horizontal drive assembly and the longitudinal drive assembly are cylinders, and can also be hydraulic cylinders, electric push rods, etc.

[0101] In addition, the quantitative ring drive assembly 0350, the rejection drive assembly 0510, the first push rod drive assembly 0430 and the sleeve drive assembly 0831 can also be existing robotic arms.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for assembling a prefilled syringe, characterized in that: include: An assembly turntable is rotatably provided and a plurality of clamping assemblies are provided on the assembly turntable, and a metering ring assembly station, a push rod assembly station, a piston assembly station and a sleeve assembly station are provided around the assembly turntable; The following steps are also included: S01, transporting the quantitative ring to the quantitative ring assembly station, and installing the quantitative ring into the clamping assembly at the quantitative ring assembly station; S02, transporting the push rod to the push rod assembly station, the assembly turntable drives the clamping assembly equipped with the quantitative ring to move to the push rod assembly station, and installing the push rod into the quantitative ring; S03, transporting the piston to the piston assembly station, the assembly turntable drives the push rod and the metering ring clamping assembly to move to the piston assembly station, and installing the piston on the push rod; S04, transporting the sleeve to the sleeve assembly station, the assembly turntable drives the clamping assembly equipped with the piston, the push rod and the metering ring to move to the sleeve assembly station, and the push rod equipped with the piston and the metering ring is removed from the clamping assembly and pushed into the sleeve, thereby completing the assembly of a syringe; S05, the assembly turntable drives the idle clamping assembly to the quantitative ring assembly station, and the cycle repeats.

2. The method for assembling a prefilled syringe according to claim 1, wherein: Also includes: A quantitative ring assembly component is provided at the quantitative ring assembly station and is used to place the quantitative ring into the clamping component located at the quantitative ring assembly station; A push rod assembly component is provided at the push rod assembly station and is used to install the push rod into the quantitative ring in the clamping component located at the push rod assembly station; a piston assembly component, provided at the piston assembly station, for assembling the piston onto the push rod on the clamping component located at the piston assembly station; and The sleeve assembly component is arranged at the sleeve assembly station and is used for installing the push rod on the clamping component located at the sleeve assembly station into the sleeve.

3. The method for assembling a prefilled syringe according to claim 1, wherein: Step S02 includes: S02.

1. The push rod is transported to the push rod assembly station. The assembly turntable drives the clamping assembly equipped with the metering ring to move to the push rod assembly station. S02.

2. Clamp the push rod to the upper side of the quantitative ring, coaxial with the quantitative ring; S02.3, press down and rotate the push rod to screw it into the quantitative ring.

4. The method for assembling a prefilled syringe according to claim 3, wherein: Step S02 further includes: S02.4, detecting whether the quantitative ring is screwed to the preset position of the push rod, and removing the push rod that is not screwed to the preset position of the push rod.

5. The method for assembling a prefilled syringe according to claim 3, wherein: Step S03 includes: S03.

1. The piston is transported to the piston assembly station. The assembly turntable drives the push rod and the metering ring clamping assembly to move to the piston assembly station. S03.2, press against the top of the push rod and push the piston from the bottom of the push rod to the bottom of the push rod.

6. The method for assembling a prefilled syringe according to claim 5, wherein: Step S03 also includes: S03.3, detecting whether the piston is inserted into the bottom of the push rod, and alarming when detecting that the piston is not inserted into the bottom of the push rod.

7. The method for assembling a prefilled syringe according to claim 5, wherein: Step S In 02.3, the dosing ring is screwed to the middle of the push rod; Step S03 also includes: S03.4, press down again and rotate the push rod to screw the quantitative ring to the top of the push rod.

8. The method for assembling a prefilled syringe according to claim 7, wherein: Step S03 also includes: S03.5, detecting whether the quantitative ring is screwed to the top of the push rod, and alarming when detecting that the quantitative ring is not screwed to the top of the push rod.

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