Fixing device of screw cap type container and screw cap equipment

Abstract

The invention relates to the technical field of cap screwing equipment, and provides a fixing device of a cap screwing type container and cap screwing equipment. The fixing device of the screw cap type container comprises a supporting part and a spiral spring, wherein the supporting part forms a supporting space; the spiral spring is arranged in the supporting space and comprises a fixed end and a free end, the fixed end is fixed to the supporting component, and the free end is used for making contact with a container inserted into the spiral spring and holding the container tightly along with rotation of the container. According to the fixing device of the screw cap type container, when the container is inserted into the spiral spring and rotates relative to the supporting component, the free end is driven, the spiral spring tightly holds the container, friction force for fixing the container is provided, and a screw cap corresponding to the container is conveniently screwed off or screwed up.

Description

Technical Field

[0001] This invention relates to the field of capping equipment technology, and more particularly to a fixing device and capping equipment for a capping container. Background Technology

[0002] Tubular containers are widely used for containing various solutions, such as reagents, and are often equipped with screw caps for sealing. The cap and container are connected by a precisely designed threaded structure, which not only provides excellent sealing performance but also facilitates opening and closing the container through rotation. However, in automated production, laboratory operations, and daily use, most mainstream capping devices on the market use mechanical grippers as actuators. These grippers employ complex mechanical structures and control logic to grasp, rotate, and release the cap, making the opening and tightening process of screw-capped containers often a tedious and costly task. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a fixing device for screw-top containers to solve the problem of high operating costs for opening or tightening existing screw-top containers.

[0004] This application also proposes a capping device.

[0005] The fixing device for a screw-top container according to the first aspect of this application includes: Supporting components form a supporting space; A helical spring is disposed within the support space. The helical spring includes a fixed end and a free end. The fixed end is fixed to the support component, and the free end is used to contact the container inserted into the helical spring and to hold the container tightly as the container rotates.

[0006] According to the embodiment of this application, when the container is inserted into the helical spring and rotates relative to the supporting component, the free end is driven, the helical spring hugs the container, and provides frictional force to fix the container, making it convenient to unscrew or tighten the screw cap corresponding to the container.

[0007] According to one embodiment of this application, the free end includes an elastic body free end and a friction component, the friction component being connected to the elastic body free end, and the friction component elastically pressing against the outer surface of the container.

[0008] According to one embodiment of this application, the friction component is soft rubber.

[0009] According to one embodiment of this application, the inner diameter of the helical spring is larger than the outer diameter of the container.

[0010] According to one embodiment of this application, the helical spring is a soft spring, and the inner diameter of the soft spring is at least partially smaller than the outer diameter of the container.

[0011] According to one embodiment of this application, the support component is a sleeve, the helical spring is fixed inside the sleeve, and the sleeve and the helical spring are coaxially arranged.

[0012] According to one embodiment of this application, a stop is provided at the top of the support member, and the stop is located outside the helical spring in the pull-out direction of the container.

[0013] According to one embodiment of this application, the helical spring includes a first spring having a first helical direction and a second spring having a second helical direction, the first helical direction and the second helical direction being opposite, and the first spring and the second spring being arranged along the extension direction of the support member.

[0014] According to one embodiment of this application, there are multiple first springs and multiple second springs, and the first springs and the second springs are arranged at intervals.

[0015] According to one embodiment of this application, the free ends of adjacent helical springs are arranged adjacent to each other, or the fixed ends of adjacent helical springs are arranged adjacent to each other.

[0016] According to one embodiment of this application, the free ends of adjacent helical springs are fixedly connected, or the fixed ends of adjacent helical springs are fixedly connected.

[0017] According to one embodiment of this application, the length of the helical spring is less than the length of the container.

[0018] The capping device according to a second aspect embodiment of this application includes: Two of the above-mentioned screw-top container fixing devices, wherein the screw cap is provided with a single helical spring, and the helical springs of the two screw-top container fixing devices have opposite helical directions; Alternatively, a fixing device for the aforementioned screw-top container, wherein the fixing device for the screw-top container comprises a plurality of helical springs with opposite helical directions.

[0019] According to one embodiment of this application, the screw-cap container includes a test tube, which may include a centrifuge tube or a cryopreservation tube.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is one of the structural schematic diagrams of the fixing device for the screw-top container provided in the embodiments of this application.

[0023] Figure 2 This is the second structural schematic diagram of the fixing device for the screw-top container provided in the embodiments of this application.

[0024] Figure 3 yes Figure 2 A schematic diagram of the C-direction cross-section provided in the embodiment.

[0025] Figure label: 110. Supporting components; 111. Supporting space; 120. Helical spring; 121. Fixed end; 122. Free end; 123. Free end of elastic body; 124. Friction component; 125. First spring; 126. Second spring. Detailed Implementation

[0026] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, wherein a fixed connection can include an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0029] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] It should be noted that commercially available screw-top containers typically require two clamping mechanisms to automate the opening process. The lower clamping mechanism uses electric or pneumatic grippers to hold the container in place, while the upper rotating gripper unscrews the cap. However, using two grippers is costly. Therefore, this application proposes a fixing device for screw-top containers that uses a simple helical spring 120 to hold and secure the container, effectively reducing production costs.

[0032] It should be noted that the screw-cap container mentioned in this application refers to a container that is sealed or opened by screwing on a cap. The container opening is provided with threads, and the cap can be screwed on along the threads to seal the opening of the container. The screw-cap container mentioned in this application is commonly found in laboratories, medical fields, etc., such as centrifuge tubes, reagent bottles, etc. This application uses a screw-cap container as a test tube as an example to describe the fixing device and screwing device of the screw-cap container of this application.

[0033] The following is combined Figures 1 to 3 This application describes a fixing device for a screw-top container and a screw-top device.

[0034] According to one embodiment of this application, a screw-cap container fixing device is provided. Please refer to... Figures 1 to 3 The screw-top container fixing device includes a support member 110 and a helical spring 120. The support member 110 forms a support space 111. The helical spring 120 is disposed in the support space 111. The helical spring 120 includes a fixed end 121 and a free end 122. The fixed end 121 is fixed to the support member 110, and the free end 122 is used to contact the container inserted into the helical spring 120 and to hold the container tightly as the container rotates.

[0035] According to the embodiment of this application, the fixing device for the screw-top container (hereinafter referred to as the "fixing device"), when the container is inserted into the helical spring 120 and the container rotates relative to the support member 110, the free end 122 is driven, the helical spring 120 hugs the container, provides frictional force to fix the container, and facilitates unscrewing or tightening the screw cap corresponding to the container.

[0036] This fixing device holds the container tightly during the tightening or loosening of the cap without requiring external power. It can automatically fix the test tube body during the tightening or loosening of the cap, and automatically release the container under the elastic action of the helical spring 120 after the tightening or loosening process is completed, making it convenient to pick up and put down.

[0037] It should be noted that the helical spring 120 has a helical structure, which can deform and store energy when subjected to external force, and return to its original shape when the external force is removed. In this application, one end of the helical spring 120 is a fixed end 121, which is fixedly connected to the support component 110, and the other end of the helical spring 120 is a free end 122. The fixed end 121 and the free end 122 are opposite each other. When the free end 122 is driven to rotate by the container, the free end 122 drives the helical structure to grip the container. The greater the distance the free end 122 is driven, the greater the gripping force generated by the helical spring 120, ultimately fixing the container. This allows it to work well with the capping device to tighten or loosen the container's cap. After the tightening or loosening of the cap is completed, due to the elastic recovery property of the helical spring 120, the free end 122 of the helical spring 120 can rotate in the opposite direction on its own. The helical spring 120 no longer grips the container, and the container can be released without additional operation, allowing the user to easily remove the container.

[0038] Understandably, the support member 110 forms a support space 111 for accommodating the helical spring 120 and the container. In some embodiments, the container may be partially located within the support space 111, with its opening protruding outwards for easy connection to the cap. Of course, in some embodiments, the container may also be completely located within the support space 111. During tightening or loosening operations, the cap extends into the support space 111 and rotates relative to the container. In this case, the cap needs an adaptive design to ensure that the component driving the cap's rotation does not interfere with the support member 110.

[0039] According to one embodiment of this application, the free end 122 includes an elastic body free end 123 and a friction member 124, the friction member 124 elastically pressing against the outer surface of the container.

[0040] It is understood that the free end 122 includes the elastic body free end 123 and the friction component 124. The friction component 124 can significantly increase the contact area and friction with the outer surface of the container, making the container more stable and less prone to slippage during rotation.

[0041] It is understandable that the friction component 124 is equivalent to reducing part of the inner diameter of the helical spring 120. When the container is inserted, the friction component 124 will be compressed and generate an initial clamping force, which increases the friction between the helical spring 120 and the container, making it easier for the container to drive the free end 122 to rotate.

[0042] It should be noted that the friction component 124 can be set not only at the free end 122, but also at other positions of the helical spring 120. For example, multiple friction components 124 can be set at intervals along the helical coil of the entire helical spring 120. This ensures that the container can be placed into the hollow position of the helical spring 120, and also ensures that when the container rotates, it can drive the helical spring 120 to twist and tighten. Of course, the friction component 124 should be set as close as possible to the free end 122 to ensure the tightening effect of the free end 122 without making it too difficult to insert the container.

[0043] The friction component 124 can be made of a soft and wear-resistant material, such as rubber or silicone. These soft materials provide sufficient friction while effectively protecting the outer surface of the container from scratches or wear. Of course, in addition to soft rubber, the friction component 124 can also be made of other materials.

[0044] The free end 123 of the elastic body is the main body of the helical spring 120, which is used to achieve elastic pressing against the outer surface of the container and to provide support for the friction component 124.

[0045] According to one embodiment of this application, the inner diameter of the helical spring 120 is larger than the outer diameter of the container. It is understood that this larger inner diameter allows the container to be easily and smoothly inserted into and removed from the helical spring 120, improving operational convenience. In this case, even without the friction component 124, the container remains more stable and less prone to slippage during rotation.

[0046] According to one embodiment of this application, the helical spring 120 is a soft spring, and the inner diameter of the soft spring is at least partially smaller than the outer diameter of the container.

[0047] Understandably, because the inner diameter of the soft spring is at least partially smaller than the outer diameter of the container, the soft spring will be compressed and generate an initial clamping force when the container is inserted. This initial clamping force helps prevent the container from slipping or falling off in the initial stage, improving the stability of the fixation.

[0048] Because the soft spring has a closer contact with the outer surface of the container, it can generate greater friction as the container rotates, making it easier to keep the container in place.

[0049] According to one embodiment of this application, the support member 110 is a sleeve, and the helical spring 120 is fixed inside the sleeve. It is understood that the sleeve provides a layer of protection for the helical spring 120, preventing it from being corroded, worn, or otherwise damaged in the external environment, thus helping to extend the spring's service life and maintain its good elastic properties. Furthermore, it can greatly improve the structural stability of the entire fixing device. According to an embodiment of this application, the sleeve and the helical spring 120 are coaxially arranged, facilitating the user to place the container into the sleeve while simultaneously placing the container inside the helical spring 120.

[0050] Of course, in addition to the sleeve structure, the support component 110 can also adopt other structural forms, as long as it can be used to fix and support the helical spring 120.

[0051] According to one embodiment of this application, a stop is provided on the top of the support member 110, and the stop is located outside the helical spring 120 in the direction of pulling out the container.

[0052] Understandably, the stop provides a physical barrier in the direction of container pull-out, effectively preventing the helical spring 120 from accidentally dislodging from the support member 110.

[0053] It should be noted that the free end 122 of the helical spring 120 is easily moved when the container is pulled out or rotated. Therefore, a stop is used to confine the free end 122 of the helical spring 120 within the support space 111, preventing the helical spring 120 from coming off or being damaged due to movement of the free end 122. This not only enhances the stability of the container but also improves the safety of the helical spring 120 within the support component 110.

[0054] According to one embodiment of this application, reference is made to... Figure 1 The helical spring 120 includes a first spring 125 having a first helical direction and a second spring 126 having a second helical direction, the first helical direction and the second helical direction being opposite, and the first spring 125 and the second spring 126 being arranged along the extension direction of the support member 110.

[0055] It should be noted that the first spring 125 and the second spring 126 have opposite helical directions. When the container rotates in the tightening direction (e.g., clockwise, but this may vary depending on the design), it interacts with one of the springs (let's say the first spring 125). During this process, the free end 122 of the first spring 125 is driven, causing the entire helical spring 120 to exert a clamping force on the container, thereby fixing it in place. While tightening the container, the clamping force of the helical spring 120 stabilizes it, facilitating subsequent operations such as unscrewing the corresponding cap.

[0056] Conversely, when the container rotates in the release direction (counter-clockwise, but this may vary depending on the design), the free end 122 of the first spring 125 releases the container, allowing it to be freely pulled out. As the container continues to rotate counter-clockwise, it interacts with another spring with the opposite helical direction (let's say the second spring 126). During this process, the free end 122 of the second spring 126 is activated, causing the helical spring 120 to exert a clamping force on the container. This bidirectional fixing mechanism means that regardless of the direction the container rotates, the helical spring 120 provides the necessary clamping force to secure it, thus improving flexibility and convenience of use.

[0057] According to one embodiment of this application, there are multiple first springs 125 and second springs 126, and the first springs 125 and second springs 126 are arranged at intervals.

[0058] When the container rotates in the tightening direction, multiple first springs 125 or multiple second springs 126 clamp the container at multiple points. This multi-point support method can more effectively distribute the force on the container, avoiding local damage or deformation caused by excessive local force. This balanced force distribution method helps to extend the service life of the container.

[0059] Similarly, when the container rotates in the release direction, multiple second springs 126 or multiple first springs 125 hold the container in multiple positions.

[0060] According to one embodiment of this application, the free ends 122 of adjacent helical springs 120 are arranged adjacent to each other.

[0061] Understandably, when the free ends 122 of adjacent helical springs 120 are arranged adjacent to each other, they can apply a clamping force to the container at a position close to the center, which helps to reduce the overall deformation or loosening caused by uneven force on individual springs, thereby enhancing the stability of the entire fixing device.

[0062] Understandably, the opening of the container is relatively fragile. The adjacent arrangement of the free ends 122 of the adjacent helical springs 120 means that the free ends 122 will not contact the opening at the end of the container, but will contact the relative middle of the container, which is more beneficial to the protection of the opening of the container.

[0063] It should be noted that "adjacent" here and "adjacent" mentioned later refers to the free end 122 of one helical spring 120 being positioned toward the free end 122 of another helical spring 120, or simply refers to the fixed end 121 of one helical spring 120 being positioned toward the fixed end 121 of another helical spring 120. The distance between the helical springs 120 can be zero or other values, and they do not need to be completely touching.

[0064] According to one embodiment of this application, the fixed ends 121 of adjacent helical springs 120 are arranged adjacent to each other.

[0065] Understandably, the adjacent fixed ends 121 of the adjacent helical springs 120 are arranged adjacently, allowing them to be more tightly connected to the support member 110, forming a more stable support structure. Since the adjacent fixed ends 121 of the adjacent helical springs 120 are arranged adjacently, the opposite free ends 122 of the adjacent helical springs 120 help to distribute the force from each spring more evenly across the container, reducing the possibility of stress concentration.

[0066] According to one embodiment of this application, the free ends 122 of adjacent helical springs 120 are fixedly connected.

[0067] It is understandable that when the free ends 122 are set adjacent to each other, if they are not fixed, the two free ends 122 may cross each other. The fixed connection of the free ends 122 of the adjacent helical springs 120 can prevent the structures of the adjacent springs from intersecting, thereby improving the stability of the fixing device.

[0068] According to one embodiment of this application, the fixed ends 121 of adjacent helical springs 120 are fixedly connected.

[0069] Understandably, connecting the fixed ends 121 allows the multiple coil springs 120 to form a more stable whole in structure. This design significantly improves the rigidity of the coil springs 120, enabling them to better resist external impacts and vibrations and maintain the stable position of the coil springs 120.

[0070] According to one embodiment of this application, the length of the helical spring 120 is less than the length of the container.

[0071] Understandably, the container's length is greater than the length of the helical spring 120, the container's opening can extend beyond the helical spring 120, and the cap can be located outside the helical spring 120 and tightened with the container. The bottom of the container can extend beyond the helical spring 120, or both the container's opening and bottom can extend beyond the helical spring 120, with the extension distance of the portion of the container extending beyond the helical spring 120 ranging from 1cm to 3cm.

[0072] The capping device according to the second aspect of this application includes the above-described fixing device for the capping container.

[0073] It should be noted that since the capping device of this application includes the aforementioned fixing device for capping containers, it has all the technical effects of the aforementioned fixing device for capping containers, which will not be repeated here.

[0074] When it is necessary to tighten the cap, the capping device drives the cap to rotate, which causes the container to rotate and drives the free end 122 of the spiral spring 120 to rotate. When the spiral spring 120 grips the container, the container is fixed and no longer rotates, and the cap can rotate relative to the container, which facilitates tightening the cap.

[0075] When the cap tightening stops, due to the elastic restoring property of the helical spring 120, the free end 122 of the helical spring 120 can rotate in the opposite direction on its own. The helical spring 120 no longer holds the container (the free end 122 of the helical spring 120 only contacts the surface of the container), and the container can be released without any additional operation. The user can easily remove the container. At this time, the user can change the container or perform other operations.

[0076] When it is necessary to loosen the cap, the capping device drives the cap to rotate, the cap rotates the container, and the rotation of the container drives the free end 122 of the spiral spring 120 to rotate. When the spiral spring 120 holds the container tightly, the container is fixed and no longer rotates, and the cap can rotate relative to the container, making it easy to unscrew the cap relative to the container.

[0077] Once the cap is unscrewed, due to the elastic restoring property of the helical spring 120, the free end 122 of the helical spring 120 can rotate in the opposite direction on its own, and the helical spring 120 no longer holds the container tightly (the free end 122 of the helical spring 120 only contacts the surface of the container). The container can be released without any additional operation, and the user can easily take out the container.

[0078] According to one embodiment of this application, the capping device includes two capping container fixing devices with opposite helical directions of the helical spring 120. One capping container fixing device can be used to tighten the cap, and the other capping container fixing device can be used to loosen the cap.

[0079] Understandably, operators only need to place the container on the corresponding fixing device to complete the capping or uncapping operation, simplifying the operation process.

[0080] It should be noted that there is no limit to the number of springs in each fixing device; for example, more than two helical springs 120 can be installed.

[0081] According to one embodiment of this application, the screw-cap container includes a test tube, which may include a centrifuge tube or a cryopreservation tube.

[0082] Centrifuge tubes are test tubes designed for use in centrifuges to withstand the centrifugal forces generated during high-speed rotation. Centrifuge tubes are made of various materials, including plastic and glass, to suit different experimental needs.

[0083] Cryopreservation tubes are primarily used to store biological samples that require long-term preservation, such as cells, tissues, and DNA. Cryopreservation tubes are often made of plastic or special materials to withstand temperature changes during freezing and thawing.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing device for a screw-top container, characterized in that, include: The support component (110) forms a support space (111). A helical spring (120) is disposed in the support space (111). The helical spring (120) includes a fixed end (121) and a free end (122). The fixed end (121) is fixed to the support member (110). The free end (122) is used to contact the container inserted into the helical spring (120) and to hold the container tightly as the container rotates.

2. The fixing device for the screw-cap container according to claim 1, characterized in that, The free end (122) includes an elastic body free end (123) and a friction component (124), the friction component (124) being connected to the elastic body free end (123) and the friction component (124) elastically pressing against the outer surface of the container.

3. The fixing device for the screw-cap container according to claim 2, characterized in that, The friction component (124) is made of soft rubber.

4. The fixing device for the screw-top container according to claim 2, characterized in that, The inner diameter of the helical spring (120) is larger than the outer diameter of the container.

5. The fixing device for the screw-cap container according to claim 1, characterized in that, The helical spring (120) is a soft spring, and the inner diameter of the soft spring is at least partially smaller than the outer diameter of the container.

6. The fixing device for the screw-cap container according to claim 1, characterized in that, The support component (110) is a sleeve, and the helical spring (120) is fixed inside the sleeve, and the sleeve and the helical spring (120) are coaxially arranged.

7. The fixing device for the screw-cap container according to claim 5, characterized in that, The top of the support member (110) is provided with a stop, which is located on the outside of the helical spring (120) in the direction of pulling out the container.

8. The fixing device for the screw-top container according to any one of claims 1 to 7, characterized in that, The helical spring (120) includes a first spring (125) having a first helical direction and a second spring (126) having a second helical direction, the first helical direction and the second helical direction being opposite, and the first spring (125) and the second spring (126) being arranged along the extension direction of the support member (110).

9. The fixing device for the screw-cap container according to claim 8, characterized in that, There are multiple first springs (125) and second springs (126), and the first springs (125) and second springs (126) are arranged at intervals.

10. The fixing device for the screw-top container according to claim 8, characterized in that, The free ends (122) of the adjacent helical springs (120) are arranged adjacent to each other, or the fixed ends (121) of the adjacent helical springs (120) are arranged adjacent to each other.

11. The fixing device for the screw-top container according to claim 10, characterized in that, The free ends (122) of adjacent helical springs (120) are fixedly connected, or the fixed ends (121) of adjacent helical springs (120) are fixedly connected.

12. The fixing device for the screw-cap container according to claim 1, characterized in that, The length of the helical spring (120) is less than the length of the container.

13. A capping device, characterized in that, include: The screw cap arrangement includes two screw cap container fixing devices according to any one of claims 1-7 and 12, the screw cap container fixing device including the helical spring (120) with a single helical direction, and the helical directions of the helical springs (120) in different screw cap container fixing devices are opposite. Alternatively, the screw cap arrangement may include the fixing device of the screw cap container as described in any one of claims 8 to 11.

14. The capping device according to claim 13, characterized in that, The screw-cap container includes test tubes, which may include centrifuge tubes or cryopreservation tubes.

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