A seal cap gripping mechanism for a syringe filling and stoppering machine

Abstract

The application discloses a sealing plug cap clamping mechanism of a syringe filling and plugging machine, which comprises a cylindrical clamping cap, a special-shaped card and an elastic locking ring; a containing groove for the sealing plug cap is arranged in the clamping cap; a plurality of card grooves are uniformly arranged along the radial direction of the clamping cap, the special-shaped card is inserted into the card groove from outside the clamping cap, and part of the special-shaped card extends into the containing groove; the number and the circumferential position of the sliding grooves arranged on the sealing plug cap correspond to the card grooves one by one; two or more locking grooves are arranged on the outer wall of the clamping cap along the axial direction at intervals, the elastic locking ring is sleeved into the locking groove, and the elastic locking ring is matched with the shape of the special-shaped card. The sealing plug cap clamping mechanism of the application is clamped by the plate-shaped surface of the plurality of special-shaped cards extending into the containing groove under the fixing action of the elastic locking ring on the special-shaped card, the clamping mechanism forms more stable clamping on the sealing plug cap, and the phenomenon that the clamping mechanism slips with the sealing plug cap during the screwing of the sealing plug cap is prevented.

Description

Technical Field

[0001] This invention relates to the field of packaging for filling syringe products, and in particular to a sealing cap clamping mechanism for a syringe filling and capping machine. Background Technology

[0002] A syringe filling and capping machine is a filling device used to produce syringes containing medication. It involves filling the syringe with medication and then sealing it with a cap at the bottom of the syringe. The cap and the bottom of the syringe are connected by a threaded seal. The syringe filling and capping machine includes: an upper tube mechanism, a filling mechanism, a capping mechanism, a filling finger, a pre-compression mechanism, and a tightening mechanism. The upper tube mechanism is used to pick up the syringe; the filling mechanism is used to fill the syringe with liquid medicine; the filling fingers are used to hold the syringe after liquid medicine filling; the stopper mechanism is used to place the sealing cap in the clamping mechanism; the tightening mechanism includes a clamping mechanism for holding the sealing cap, a tightening motor, and a control system. The upper end of the clamping mechanism is used to hold the sealing cap and the sealing plug, and the lower end of the clamping mechanism is fixed to the drive shaft of the tightening motor, that is, the tightening motor is used to provide the tightening driving force for the sealing cap; the pre-compression mechanism is used to press the tightening mechanism upward to achieve pre-compression of the sealing cap and the lower port of the syringe. Through the pre-compression mechanism and the control system, the tightening motor is controlled to install the sealing cap on each syringe after liquid medicine filling, thus completing the sealing of the syringe product after liquid medicine filling.

[0003] Figures 1-5A clamping mechanism for an existing syringe filling and capping machine is provided, comprising: a cylindrical clamping head a, a locking nut b, a support bar c, and a ball bearing d; in the figure, the upper end of the clamping head a is provided with a cylindrical receiving groove a-1, which is used to receive a sealing cap f. The side wall of the receiving groove a-1 is provided with a cylindrical channel hole a-2 from the outside to the inside, wherein the diameter of the hole near the receiving groove a-1 is smaller than the diameter of the channel hole. A ball bearing d is installed in each channel, and a support bar c extending out of the channel is also installed in each channel. The support bar c supports the ball bearing d towards the receiving groove a-1. The portion of the clamping head a with a diameter larger than the outer wall of the receiving groove a-1 is provided with an external thread. The internal thread of the locking nut b engages with the external thread. Under the pressure of the side wall of the locking nut b on the support bar c, the ball bearing d is pressed into the groove f-1 opened on the outer wall of the sealing cap f. The pre-compression mechanism of this syringe filling and capping machine uses a cylinder. With the filling fingers gripping the syringe g after filling with the liquid, the cylinder rises and presses against the tightening mechanism, pre-compressing the sealing cap f to the lower end of the syringe g. Then, the tightening motor of the tightening mechanism provides rotational driving force to tighten the sealing cap f onto the syringe g. During the tightening process, the sliding groove f-1 of the sealing cap f is held and fixed by the ball bearing d. However, during the tightening process, the ball bearing d may roll, causing the sealing cap f to slip during gripping. This results in the sealing cap f not being tightened stably, and the sealing cap f becoming loose, leading to a large number of defective filled syringes and posing a significant quality risk.

[0004] Furthermore, after the sealing cap f is pre-tightened with the syringe, the ball d is pressed down by the support bar c under the locking action of the locking nut and cannot move inward or outward. This causes misalignment and misalignment when the sealing cap f is installed into the receiving groove a-1 of the clamping head a. That is, the ball d protruding into the receiving groove a-1 does not correspond to the position of the sliding groove f-1 of the sealing cap f, causing the sealing cap f to slip during the tightening process. As a result, the sealing cap f cannot be tightened with the syringe g, which easily leads to a large number of unqualified syringe filling products.

[0005] In the existing clamping mechanism, the ball bearing d is made of steel, and the support bar c is made of plastic. Under the pressure of the locking nut b's sidewall on the support bar c, the support bar c is prone to deformation, reducing the clamping force of the ball bearing d on the sealing cap f, and making it more likely that the sealing cap f cannot be tightened onto the syringe. In addition, due to the molding defects of the plastic parts themselves, it is difficult to form a precise fit between them and the ball bearing d and the locking nut b's sidewall, which is also not conducive to tightening the sealing cap. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a sealing cap clamping mechanism for a syringe filling and capping machine, so as to solve the problem that the sealing cap cannot be tightened to the lower port of the syringe due to the existing clamping structure.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A sealing cap clamping mechanism for a syringe filling and capping machine includes: a cylindrical clamping cap, a shaped card, and an elastic locking ring;

[0009] The clamping cap is provided with a receiving groove for a sealing plug; a plurality of card slots are evenly arranged along the radial direction of the clamping cap, and the irregularly shaped cards are inserted into the card slots from outside the clamping cap, with some of the irregularly shaped cards extending into the receiving grooves; the number and circumferential position of the card slots correspond one-to-one with the sliding grooves opened on the sealing plug.

[0010] At the card slot location, two or more locking grooves are axially spaced on the outer wall of the clamping cap, and the elastic locking ring is fitted into the locking groove, with the elastic locking ring matching the shape of the irregular card.

[0011] Furthermore, the sealing cap clamping mechanism also includes a fixing part connected to the rotary drive shaft of the tightening mechanism in the syringe filling and capping machine, the fixing part being disposed axially below the clamping cap.

[0012] Furthermore, the sealing cap clamping mechanism also includes an adjusting bracket disposed between the clamping cap and the fixing part.

[0013] Furthermore, the sealing cap clamping mechanism also includes an elastic adjustment device installed between the adjusting bracket and the fixing part.

[0014] Furthermore, the elastic adjustment device includes: a spring fitted onto the lower end of the adjustment bracket, and a locking ring threadedly connected to the adjustment bracket, wherein the spring presses against the adjustment bracket and the locking ring.

[0015] Furthermore, the elastic locking ring is a rubber sealing ring.

[0016] The sealing cap clamping mechanism of the syringe filling and capping machine of the present invention, under the fixing action of the elastic locking ring on the irregular card, the multiple irregular card parts extending into the receiving groove form a sheet-like surface clamping the sliding groove of the sealing cap, so that the clamping mechanism forms a more stable clamping of the sealing cap and prevents the clamping mechanism from slipping on the sealing cap when tightening the sealing cap. When placing the sealing cap into the clamping mechanism, even if the position of the groove does not correspond to the position of the irregularly shaped card inserted into the receiving groove, the elastic locking ring will cause the ends of multiple irregularly shaped cards to clamp the part of the sealing cap without the groove. During the tightening of the sealing cap, the irregularly shaped cards can continue to clamp the part without the groove, completing the rotational sealing of the sealing cap. When the friction between the irregularly shaped card and the part without the groove is insufficient, the irregularly shaped card will automatically slide into the groove. Under the action of the elastic locking ring, multiple irregularly shaped cards will form a stable clamp on the sealing cap, and the irregularly shaped cards will not fall out of the groove, ensuring that the sealing cap can be tightened to the lower end of the syringe. That is, when placing the sealing cap into the clamping mechanism, it is not necessary to ensure that the groove and the card slot are strictly aligned, which simplifies the placement difficulty of the sealing cap and improves the sealing efficiency of the syringe filling product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the clamping mechanism of a syringe filling and capping machine in the background art;

[0018] Figure 2 for Figure 1 A schematic diagram showing the installation of some components in the clamping mechanism;

[0019] Figure 3 for Figure 1 A schematic axial cross-sectional view of the clamping mechanism used in the syringe filling and stoppering machine;

[0020] Figure 4 for Figure 1 A schematic diagram of the clamping mechanism used in a syringe filling and capping machine;

[0021] Figure 5 for Figure 4 A schematic diagram of the AA cross-sectional structure;

[0022] Figure 6 This is a schematic diagram of the sealing cap clamping mechanism of the syringe filling and capping machine provided as an example of the present invention;

[0023] Figure 7 for Figure 6 A schematic diagram of the installation of some structures in the sealing cap clamping mechanism of a syringe filling and capping machine;

[0024] Figure 8 for Figure 6 A schematic axial cross-sectional view of part of the clamping mechanism used in the syringe filling and stoppering machine;

[0025] Figure 9 for Figure 6 A schematic diagram of the clamping mechanism used in a syringe filling and capping machine;

[0026] Figure 10 for Figure 9 A schematic diagram of the BB cross-sectional structure;

[0027] Installation diagram;

[0028] In the picture:

[0029] 1—Clamping cap; 1-1—Receiving groove; 1-2—Card groove; 1-3—Locking groove; 2—Irregularly shaped card; 3—Elastic locking ring; 4—Sealing plug cap; 4-1—Slide groove; 5—Fixing part; 6—Adjusting bracket; 7—Elastic adjusting device; 7-1—Spring; 7-2—Locking ring; 8—Injector. Detailed Implementation

[0030] To enable those skilled in the art to better understand the solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the examples of the present invention. Obviously, the described examples are only a part of the examples of the present invention, and not all of the examples. Based on the examples in the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] like Figures 6-10 The example shown provides a sealing cap clamping mechanism for a syringe filling and capping machine according to the present invention, comprising: a cylindrical clamping cap 1, an irregularly shaped card 2, and an elastic locking ring 3;

[0032] The clamping cap 1 is provided with a receiving groove 1-1 for the sealing plug cap 4; a number of card slots 1-2 are evenly arranged along the radial direction of the clamping cap 1, and irregularly shaped cards 2 are inserted from outside the clamping cap 1 into the card slots 1-2, with some irregularly shaped cards 2 extending into the receiving groove 1-1; the number and circumferential position of the card slots 1-2 correspond one-to-one with the sliding grooves 4-1 opened on the sealing plug cap 4, so as to ensure that each irregularly shaped card 2 extending into the receiving groove 1-1 can be inserted into the corresponding sliding groove 4-1.

[0033] See Figure 7 The card slot 1-2 on the clamping cap 1 is not a through slot. The irregular card 2 is installed in the card slot 1-2, and the bottom wall of the card slot 1-2 limits a part of the irregular card 2.

[0034] At the location of the card slot 1-2, two or more locking slots 1-3 are opened axially on the outer wall of the clamping cap 1. The elastic locking ring 3 is fitted into the locking slot 1-3, and the elastic locking ring 3 matches the shape of the irregular card 2.

[0035] See Figure 10 In this example, the sealing cap 4 has four grooves evenly arranged circumferentially, and correspondingly, the clamping cap 1 has four card slots 1-2 evenly arranged radially, into which four irregularly shaped cards 2 are inserted. See also Figures 7-8 In this example, the outer wall of the clamping cap 1 has two locking grooves 1-3 at the upper and lower ends along the axial direction, and two elastic locking rings 3 are respectively installed into the two locking grooves 1-3.

[0036] In this example, the sealing cap clamping mechanism of the syringe filling and capping machine, under the fixing action of the elastic locking ring 3 on the irregular card 2, the multiple irregular cards 2 extending into the receiving groove 1-1 form a sheet-like clamping surface on the sliding groove 4-1 of the sealing cap 4, so that the clamping mechanism forms a more stable clamping on the sealing cap 4, and prevents the clamping mechanism from slipping on the sealing cap 4 when tightening the sealing cap 4. When placing the sealing cap 4 into the clamping mechanism, even if the position of the slide groove 4-1 does not correspond to the position of the irregular card 2 extending into the receiving groove 1-1, under the elastic action of the elastic locking ring 3, the ends of multiple irregular cards 2 clamp the part of the sealing cap 4 without the slide groove 4-1. During the tightening of the sealing cap 4, the irregular card 2 can continue to clamp the part without the slide groove, completing the rotational sealing of the sealing cap 4. When the friction between the irregular card 2 and the part without the slide groove 4-1 is insufficient, the irregular card 2 will automatically slide into the slide groove 4-1. Under the action of the elastic locking ring 3, multiple irregular cards 2 will form a stable clamp on the sealing cap 4, and the irregular card 2 will not come out of the slide groove 4-1, ensuring that the sealing cap 4 can be tightened to the lower end of the syringe 8. That is, when placing the sealing cap 4 into the clamping mechanism, it is not necessary to ensure that the slide groove 4-1 and the card groove 1-2 are strictly aligned, which simplifies the placement difficulty of the sealing cap 4 and improves the sealing efficiency of the syringe filling product.

[0037] The sealing cap clamping mechanism of this example further includes a fixing part 5 connected to the rotary drive shaft of the tightening mechanism in the syringe filling and capping machine. The fixing part 5 is located axially below the clamping cap 1. The connection between the drive part and the clamping mechanism is achieved through the fixing part. Preferably, in this example, the fixing part 5 is a fixing sleeve, and the rotary drive shaft is fixedly connected to the fixing sleeve by screws.

[0038] The sealing cap clamping mechanism in this example also includes an adjusting bracket 6 disposed between the clamping cap 1 and the fixing part 5. The adjusting bracket 6 is provided to adjust the installation height of the clamping cap 1, and therefore, the adjusting bracket 6 itself can be set to different heights.

[0039] The sealing cap clamping mechanism of this example also includes an elastic adjustment device 7 installed between the adjustment bracket 6 and the fixing part 5. The elastic adjustment device 7 is provided to cushion the entire clamping mechanism and protect the sealing cap 4 from overtightening and breakage when it is tightened to the limit position of the lower end of the syringe 8.

[0040] Preferably, see Figures 6-7 and Figure 9 The elastic adjustment device 7 in this example includes: a spring 7-1 fitted onto the lower end of the adjustment bracket 6, and a locking ring 7-2 threadedly connected to the adjustment bracket 6. The spring 7-1 presses against the adjustment bracket 6 and the locking ring 7-2. The number of locking rings 7-2 installed can be determined according to the required cushioning effect. In this example, two locking rings 7-2 are installed at the lower end of the adjustment bracket 6.

[0041] In this example, the elastic locking ring 3 is a rubber sealing ring, which is easy to process and install. In other embodiments of the present invention, the elastic locking ring 3 may also be other sealing rings with elastic locking function.

[0042] Finally, it is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the principles and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A sealing cap clamping mechanism for a syringe filling and capping machine, characterized in that, include: Cylindrical clamping cap, irregularly shaped card, elastic locking ring; The clamping cap is provided with a receiving groove for a sealing plug cap; A plurality of card slots are evenly arranged along the radial direction of the clamping cap. The irregularly shaped cards are inserted into the card slots from outside the clamping cap, and some of the irregularly shaped cards extend into the receiving slots. The number and circumferential position of the card slots correspond one-to-one with the sliding grooves opened on the sealing plug cap. At the card slot location, two or more locking grooves are axially spaced on the outer wall of the clamping cap, and the elastic locking ring is fitted into the locking groove, with the elastic locking ring matching the shape of the irregular card.

2. The sealing cap clamping mechanism according to claim 1, characterized in that, Also includes: A fixing part connected to the rotary drive shaft of the tightening mechanism in a syringe filling and capping machine, the fixing part being located axially below the clamping cap.

3. The sealing cap clamping mechanism according to claim 2, characterized in that, Also includes: An adjustment bracket is disposed between the clamping cap and the fixing part.

4. The sealing cap clamping mechanism according to claim 3, characterized in that, Also includes: An elastic adjustment device is installed between the adjustment bracket and the fixing part.

5. The sealing cap clamping mechanism according to claim 4, characterized in that, The elastic adjustment device includes: a spring fitted onto the lower end of the adjustment bracket, and a locking ring threadedly connected to the adjustment bracket, wherein the spring presses against the adjustment bracket and the locking ring.

6. The sealing cap clamping mechanism according to claim 1, characterized in that, The elastic locking ring is a rubber sealing ring.

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