A power component assembly machine for a pre-filled syringe

Abstract

The present invention belongs to the technical field of manufacturing equipment for prefilled syringes, and specifically relates to a power component assembly machine for prefilled syringes. It includes a first support frame and a second support frame arranged on a base. A first pressing head facing downward is provided on the first support frame through a first cylinder, and a second pressing head facing downward is provided on the second support frame through a second cylinder. A spring clamping mechanism cooperating with the second pressing head is further provided below the second pressing head on the second support frame. A product placement device is provided on the base through a linear driving device. A product placement seat is provided on the product placement device, and a fixing frame is provided on one side of the product placement seat on the product placement device. A transverse first telescopic mechanism is provided on the fixing frame, and a clamping jaw is fixedly provided above the placement seat at the free end of the first telescopic mechanism. This solves the problem that currently, workers install the spring between two outer shells manually, resulting in high labor intensity and low work efficiency for workers.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing equipment for prefilled syringes, and particularly relates to an assembling machine for a power assembly of a prefilled syringe. Background Art

[0002] When manufacturing a prefilled syringe, a power assembly, that is, a spring, needs to be installed. The prefilled syringe has a first outer shell and a second outer shell, and flanges are provided between the two ends of the first outer shell and between the two ends of the second outer shell. During assembly, the lower section of the first outer shell needs to be inserted into the second outer shell, and then a component with a barb at the lower end for hooking the lower section of the second outer shell is axially inserted into the first outer shell. A slot matching the barb is provided on the lower section of the second outer shell. After assembly, the upper end of the component is clamped with the upper end of the first outer shell, and the lower end hooks the slot of the second outer shell through the barb, so as to lock the mutually inserted first outer shell and second outer shell. However, the length of the installed spring is greater than the distance between the flange on the first outer shell and the flange on the second outer shell when they are mutually inserted, that is, similar to assembling the components in Figure 7 into the shape of Figure 8 Therefore, if assembled manually, it is quite laborious. Workers need to compress the spring hard to insert the first outer shell into the second outer shell, which increases the labor intensity of the workers and reduces the assembly efficiency. Summary of the Invention

[0003] The object of the present invention is to address the deficiencies of the prior art. By adopting the method of setting two workstations to separately perform the actions of placing the spring and the actions of inserting the two outer shells, and cooperating with the lifting mechanism located in the placement cavity, the spring can be automatically installed between the two mutually inserted outer shells, and after the spring is placed, the barb on the component clamped with the first outer shell can safely hook the second outer shell, solving the problem that currently, the spring is installed between the two outer shells manually, resulting in high labor intensity of workers and low work efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A power component assembly machine for a pre-filled syringe, comprising a first support frame and a second support frame disposed on a base. A preset gap is provided between the first support frame and the second support frame. A first pressing head is provided downward on the first support frame through a first cylinder. A second pressing head is provided downward on the second support frame through a second cylinder. A spring clamping mechanism cooperating with the second pressing head is further provided below the second pressing head on the second support frame. A product placing device is provided on the base through a linear driving device. The direction in which the linear driving device drives the product placing device to move is parallel to the connecting line segment between the first support frame and the second support frame. A product placing seat is provided on the product placing device. A fixing frame is provided on one side of the product placing seat on the product placing device. A first telescopic mechanism is provided horizontally on the fixing frame. A clamping jaw is fixedly provided above the placing seat at the free end of the first telescopic mechanism. An upward-opening placing cavity is provided on the product placing seat. Lifting mechanisms are provided on opposite sides inside the placing cavity.

[0006] Preferably, the spring clamping mechanism includes a finger cylinder horizontally disposed on the second support frame. Two opposite clamping plates are provided on the fingers of the finger cylinder. The projection of the inner wall of each clamping plate on the base is arc-shaped. First notches cooperating with the second pressing head are longitudinally provided on the opposite surfaces of the two clamping plates.

[0007] Preferably, the second pressing head includes an inverted T-shaped plate. The upper end of the T-shaped plate is fixedly connected to the output end of the second cylinder. The lower end of the second pressing head cooperates with the first notch.

[0008] Preferably, the linear driving device includes a motor and a lead screw. The motor is disposed on the base. The output end of the motor is drivingly connected to the lead screw. The product placing device is engaged between the two ends of the lead screw. The lower end of the product placing device is slidably connected to the base. The lead screw is parallel to the connecting line segment between the first support frame and the second support frame.

[0009] Preferably, the projection of the inner surface of the clamping jaw on the base is arc-shaped, and the central angle of the arc is between 0 degrees and 180 degrees.

[0010] Preferably, the lifting mechanism includes a telescopic channel, a second telescopic mechanism, and a support platform. The telescopic channel that runs horizontally is provided on the product placement seat and penetrates the placement cavity. The second telescopic mechanism is provided on the fixed frame and is located below the first telescopic mechanism. There are two parallel telescopic rods on the second telescopic mechanism. Both telescopic rods axially penetrate the telescopic channel. The middle section of the upper surface of each telescopic rod is an inclined surface, and the inclined surface is perpendicular to the vertical plane where the telescopic rod is located. A support platform coaxial with the placement cavity is provided in the placement cavity. Connecting ears are provided on both opposite sides of the outer side wall of the support platform. Second notches for cooperating with the connecting ears are longitudinally provided on the inner surface of the placement cavity above the telescopic rod. The top of the second notch is also on the inner surface of the placement cavity. The lower surface of the connecting ear contacts the upper surface of the telescopic rod.

[0011] Preferably, the product placement seat includes a seat body and a cover body. The seat body is provided on the product placement device. The second notch is provided on the seat body. The upper end of the second notch extends outside the seat body. The cover body is fixedly provided on the upper surface of the seat body. The placement cavity penetrates the cover body.

[0012] Preferably, it further includes a housing. The housing is provided on the base. The first support frame, the second support frame, the linear drive device, and the product placement device are all located inside the housing. A product placement opening is provided on the side wall of the housing.

[0013] Preferably, protective gratings are provided on two edges perpendicular to the base at the product placement opening.

[0014] Preferably, a pressure sensor is provided on the first pressing head.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention adopts the method of setting two workstations to separately perform the actions of placing the spring and the actions of inserting the two outer shells, and cooperating with the lifting mechanism located in the placement cavity, which can automatically install the spring between the two mutually inserted outer shells. And after the spring is placed, it can safely make the barb on the component clamped to the first outer shell hook the second outer shell, solving the problem that currently, manual labor is used to install the spring between the two outer shells, resulting in high labor intensity and low work efficiency for workers.

[0017] 2. The present invention drives the product placement device to move back and forth between the first support frame and the second support frame 3 through a drive motor, which is convenient for switching the pressing head.

[0018] 3. In the present invention, the second pressing head is set as an inverted T-shaped plate, so that the horizontal part of the T-shaped plate can press against the opposite sides of the top of the spring. The first slot allows the horizontal part of the T-shaped plate to smoothly enter the clamping plate to squeeze the spring, while not affecting the effect of the clamping plate clamping the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is Figure 1 a schematic structural diagram after removing the housing in

[0021] Figure 3 is a schematic structural diagram of the second cylinder in the present invention;

[0022] Figure 4 is a schematic structural diagram of the product placement device in the present invention;

[0023] Figure 5 is Figure 4 a schematic structural diagram after removing the cover in

[0024] Figure 6 is a schematic structural diagram of the cover in the present invention;

[0025] Figure 7 is a schematic diagram of the components to be assembled described in the background art;

[0026] Figure 8 is Figure 7 a schematic diagram after assembling the components in

[0027] Wherein, 1. Base; 2. First support frame; 3. Second support frame; 4. Protection grating; 5. First cylinder; 6. First pressing head; 7. First cylinder; 8. Second pressing head; 9. Fixed frame; 10. First telescopic mechanism; 11. Claw; 12. Placement cavity; 13. Finger cylinder; 14. Clamping plate; 15. First slot; 16. Housing; 17. Motor; 18. Lead screw; 19. Product placement device; 20. Telescopic channel; 21. Second telescopic mechanism; 22. Support table; 23. Expansion rod; 24. Inclined plane; 25. Second slot; 26. Connecting ear; 27. Seat body; 28. Cover body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Refer to Figures 1-8As shown, a power component assembly machine for a pre-filled syringe includes a first support frame 2 and a second support frame 3 provided on a base 1. A preset gap is provided between the first support frame 1 and the second support frame 3. A downward first pressing head 6 is provided on the first support frame 1 through a first cylinder 5. A downward second pressing head 8 is provided on the second support frame 3 through a second cylinder 7. A spring clamping mechanism cooperating with the second pressing head 8 is further provided on the second support frame 3 below the second pressing head 8. A product placing device is provided on the base 1 through a linear driving device. The direction in which the linear driving device drives the product placing device to move is parallel to the connecting line segment between the first support frame 2 and the second support frame 3. A product placing seat is provided on the product placing device 19. A fixing frame 9 is provided on one side of the product placing seat on the product placing device 19. A horizontal first telescopic mechanism 10 is provided on the fixing frame 9. A clamping jaw 11 is fixedly provided above the placing seat at the free end of the first telescopic mechanism 10. An upward-opening placing cavity 12 is provided on the product placing seat. Lifting mechanisms are provided on opposite sides within the placing cavity 12.

[0029] In this embodiment, during use, the device of the present invention is started. At this time, the product placing device 19 is located at the second support frame 3. At the same time, the lifting mechanism within the placing cavity 12 rises, and then a second outer shell is placed into the placing cavity 12. At this time, the lifting mechanism holds the second outer shell within the placing cavity 12, and then a spring is sleeved on the second outer shell, such that Figure 4 Then Figure 7The second outer shell therein is placed inside the placement cavity 12. Then, the second pressing head 8 descends under the action of the second cylinder 7, squeezing the spring so that the spring contracts in the upper section of the second outer shell. Then, the spring clamping mechanism clamps and fixes the contracted spring on the second outer shell. At this time, the top end of the second outer shell extends from the inside of the spring to outside the top end of the spring. Then, the product placement device 19 moves to the first support frame 2 under the driving action of the linear driving device. Then, the first outer shell is inserted from the top end of the second outer shell. Then, the component with barbs is inserted from the top end of the first outer shell into the whole formed by the first outer shell and the second outer shell. Then, the first cylinder 5 drives the first pressing head 6 to overcome the elastic force of the spring and snap-connect the upper section of the component with barbs to the top end of the first outer shell. At this time, the lower end of the first outer shell descends between the lifting mechanisms on both sides inside the placement cavity 12, and the lower end of the component with barbs exceeds the position of the card slot that cooperates with the barbs. Then, the first cylinder 5 remains stationary (neither contracts nor extends), and at the same time, the spring clamping mechanism retracts. At this time, the lifting mechanism located inside the placement cavity 12 descends, causing the second outer shell to descend inside the placement cavity 12. With the first outer shell remaining stationary, the second outer shell moves away from the first outer shell under the elastic force of the spring, causing the card slot to descend and cooperate with the barbs. Finally, the top end of the spring abuts against the flange on the first outer shell. After such a design, it is not necessary to manually squeeze the spring to snap-connect the upper section of the component with barbs to the top end of the first outer shell, thus liberating the labor force and improving production efficiency.

[0030] As a preferred method, the spring clamping mechanism includes a finger cylinder 13 horizontally arranged on the second support frame 3. Two opposite clamping plates 14 are provided on the fingers of the finger cylinder 13. The projection of the inner wall of each clamping plate 14 on the base 1 is arc-shaped. Longitudinal first notches 15 that cooperate with the second pressing head 8 are provided on the opposite surfaces of the two clamping plates 14. By providing the finger cylinder 13, the finger cylinder 13 can clamp and release the spring. The inner side wall of the clamping plate 14 is arc-shaped mainly to ensure that the force applied to the circumferential surface of the spring is a uniform force when clamping the spring, avoiding local deformation of the spring under the clamping force. The setting of the first notch 15 is to cooperate with the second pressing head 8 so that when the second pressing head 8 descends, it can pass through the first notch 15 and press against the opposite two sides of the top of the spring, making the pressure received by the spring uniform.

[0031] As a preferred method, the second pressing head 8 includes an inverted T-shaped plate. The upper end of the T-shaped plate is fixedly connected to the output end of the second cylinder 7, and the lower end of the second pressing head 8 cooperates with the first notch 15. The second pressing head 8 is set as an inverted T-shaped plate so that the horizontal part on the T-shaped plate can press against the opposite two sides of the top of the spring. The first notch 15 allows the horizontal part on the T-shaped plate to smoothly enter the clamping plate 14 to squeeze the spring, and at the same time, it will not affect the effect of the clamping plate 14 clamping the spring.

[0032] As a preferred embodiment, the linear drive device includes a motor 17 and a lead screw 18. The motor 17 is disposed on the base 1. The output end of the motor 17 is drivingly connected to the lead screw 18. The product placement device 19 is engaged between the two ends of the lead screw 18. The lower end of the product placement device 19 is slidably connected to the base 1. The lead screw 18 is parallel to the connecting line segment between the first bracket 1 and the second support frame 3. By driving the motor to drive the product placement device 19 to move back and forth between the first support frame 2 and the second support frame 3, it is convenient to switch the pressing head.

[0033] As a preferred embodiment, the projection of the inner surface of the clamping jaw 11 on the base 1 is arc-shaped, and the central angle of the arc is between 0 degrees and 180 degrees. To prevent the top end of the spring from exceeding the top end of the second housing, the clamping jaw 11 is mainly used to clamp the spring. Since the clamping jaw 11 is installed on the first telescopic mechanism 10, when the clamping jaw 11 moves, it moves radially relative to the spring. The clamping jaw 11 cannot be arranged to move axially relative to the spring because the first housing still needs to be placed at the top end of the spring. Therefore, the central angle of the arc of the clamping jaw 11 is between 0 degrees and 180 degrees, preferably 180 degrees.

[0034] As a preferred embodiment, the lifting mechanism includes a telescopic channel 20, a second telescopic mechanism 21, and a support platform 22. The telescopic channel 20 is horizontally provided on the product placement seat and penetrates through the placement cavity 12. The second telescopic mechanism 21 is provided on the fixed frame 9 and is located below the first telescopic mechanism 10. Two parallel telescopic rods 23 are provided on the second telescopic mechanism 21. Both of the two telescopic rods 23 axially penetrate through the telescopic channel 20. The middle section of the upper surface of each telescopic rod 23 is an inclined surface 24. The inclined surface 24 is perpendicular to the vertical plane where the telescopic rod 23 is located. A support platform 22 coaxial with the placement cavity 12 is provided in the placement cavity 12. Connecting ears 26 are provided on both opposite sides of the outer side wall of the support platform 22. Second notches 25 for cooperating with the connecting ears 26 are longitudinally provided on the inner surface of the placement cavity 12 above the telescopic rods 23. The top end of the second notch 25 is also located on the inner surface of the placement cavity 12. The lower surface of the connecting ear 26 contacts the upper surface of the telescopic rod 23. By providing the support platform 22, a through hole is provided in the center of the support platform 22, so that the lower end of the first outer shell can penetrate to the lower end of the support platform 22, so that the component with barbs can penetrate the support platform 22 and descend during extrusion, so that the upper section of the component with barbs can be clamped with the first outer shell. And after the telescopic rod 23 moves, when the support platform 22 moves along the inclined surface 24 to the lowest end of the inclined surface 24, the distance between the flange on the second outer shell and the flange on the first outer shell increases, so that the barb moves to a state of cooperating with the card slot under the action of the spring; the setting of the second notch 25 is to limit the support platform 22, so that the lifting platform 22 can only move up and down and cannot rotate.

[0035] As a preferred embodiment, the product placement seat includes a seat body 27 and a cover body 28. The seat body 27 is provided on the product placement device 19. The second notch 25 is provided on the seat body 27. The upper end of the second notch 25 extends outside the seat body 27. The cover body 28 is fixedly provided on the upper surface of the seat body 27. The placement cavity 12 penetrates through the cover body 28. By providing the second notch 25 on the seat body 27, the lower surface of the cover body 28 becomes the top wall of the second notch 25, serving as a limiting device for the upward movement of the connecting ear 26 of the support platform 22, and preventing the support platform 22 from falling out of the placement cavity 12 during the process of carrying the device of the present invention.

[0036] As a preferred embodiment, it further includes a housing 16. The housing 16 is provided on the base 1. The first support frame 2, the second support frame 3, the linear driving device, and the product placement device 19 are all located inside the housing 16. A product placement opening is provided on the side wall of the housing 16. The setting of the housing 16 can ensure the safety of the operator when operating the present invention.

[0037] As a preferred method, protective gratings 4 are provided on two edges perpendicular to the base 1 at the product placement opening. The setting of the protective gratings 4 prevents the operator's hand from reaching into the housing 16 and getting injured during the startup process of the present invention; when the operator's hand reaches into the product placement opening of the housing 16, after the protective grating 4 senses the information, it transmits the information to shut down the machine to the switch of the present invention, so that the first cylinder 5 and the second cylinder 7 stop working, thus ensuring the safety of the operator.

[0038] As a preferred method, a pressure sensor is provided on the first pressing head 6. By setting the pressure sensor, it is possible to prevent the product from being damaged due to excessive extrusion force.

Claims

1. A power component assembly machine for a pre-filled syringe, characterized in that, it includes a first support frame and a second support frame arranged on a base. A preset gap is provided between the first support frame and the second support frame. A first pressing head is provided downward on the first support frame through a first air cylinder. A second pressing head is provided downward on the second support frame through a second air cylinder. A spring clamping mechanism cooperating with the second pressing head is further provided below the second pressing head on the second support frame. A product placing device is provided on the base through a linear driving device. The direction in which the linear driving device drives the product placing device to move is parallel to the connecting line segment between the first support frame and the second support frame. A product placing seat is provided on the product placing device. A fixing frame is provided on one side of the product placing seat on the product placing device. A transverse first telescopic mechanism is provided on the fixing frame. A clamping jaw is fixedly provided above the placing seat at the free end of the first telescopic mechanism. An upward-opening placing cavity is provided on the product placing seat. Lifting mechanisms are provided on opposite sides in the placing cavity; The spring clamping mechanism includes a finger cylinder transversely arranged on the second support frame. Two opposite clamping plates are provided on the fingers of the finger cylinder. The projection of the inner wall of each clamping plate on the base is arc-shaped. First notch openings cooperating with the second pressing head are longitudinally provided on the opposite surfaces of the two clamping plates; The second pressing head includes an inverted T-shaped plate; The lifting mechanism includes a telescopic channel, a second telescopic mechanism, and a support platform. The product placing seat is transversely provided with the telescopic channel penetrating through the placing cavity. The second telescopic mechanism is arranged on the fixing frame and is located below the first telescopic mechanism. Two parallel telescopic rods are provided on the second telescopic mechanism. Both telescopic rods axially penetrate through the telescopic channel. The middle section of the upper surface of each telescopic rod is an inclined surface. The inclined surface is perpendicular to the vertical plane where the telescopic rod is located. A support platform coaxial with the placing cavity is provided in the placing cavity. Connecting ears are provided on opposite sides of the outer side wall of the support platform. Second notch openings cooperating with the connecting ears are longitudinally provided on the inner surface of the placing cavity above the telescopic rods. The top and bottom of the second notch openings are both located on the inner surface of the placing cavity. The lower surface of the connecting ear contacts the upper surface of the telescopic rod.

2. The power component assembly machine for a pre-filled syringe according to claim 1, characterized in that, the upper end of the T-shaped plate is fixedly connected to the output end of the second air cylinder, and the lower end of the second pressing head cooperates with the first notch opening.

3. The power component assembly machine for a pre-filled syringe according to claim 1, characterized in that, the linear driving device includes a motor and a lead screw. The motor is arranged on the base. The output end of the motor is drivingly connected to the lead screw. The product placing device meshes with both ends of the lead screw. The lower end of the product placing device is slidably connected to the base. The lead screw is parallel to the connecting line segment between the first support frame and the second support frame.

4. A power component assembly machine for a pre-filled syringe according to claim 1, characterized in that, the projection of the inner surface of the jaw on the base is arc-shaped, and the central angle of the arc is between 0 degrees and 180 degrees.

5. A power component assembly machine for a pre-filled syringe according to claim 1, characterized in that, the product placement seat includes a seat body and a cover body. The seat body is arranged on the product placement device, the second notch is arranged on the cover body, the upper end of the second notch is on the seat body, the lower end of the second notch extends outside the cover body, the cover body is fixedly arranged on the upper surface of the seat body, and the placement cavity penetrates through the cover body.

6. A power component assembly machine for a pre-filled syringe according to any one of claims 1-5, characterized in that, it further includes a housing arranged on the base. The first support frame, the second support frame, the linear drive device, and the product placement device are all located inside the housing, and a product placement opening is provided on the side wall of the housing.

7. A power component assembly machine for a pre-filled syringe according to claim 6, characterized in that, protective gratings are provided on two edges perpendicular to the base at the product placement opening.

8. A power component assembly machine for a pre-filled syringe according to claim 7, characterized in that, a pressure sensor is provided on the first pressing head.

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