Lockable screw type twist lock for containers

Abstract

The utility model provides a kind of lockable screw type container twist lock, including two lock heads, two housings, two positioning blocks, middle shaft, four fixed screws and two lock screws;The left and right ends of the middle shaft are all through the housing and the lock head, the lock head is located the outside of housing, the housing is movably sleeved the middle shaft, the lock head is threaded sleeve connection middle shaft, the upper and lower ends of the housing are all connected with positioning block, the left and right ends of the positioning block are all connected with housing, the housing is connected with positioning block by fixed screw, the middle part of the positioning block is connected with lock screw thread, the lock screw is connected with the middle part of middle shaft.The utility model has the beneficial effects: generate pre-tightening force, eliminate gap, have anti-loose function, have the ability of transmission tension and pressure and bending torque.

Description

Technical Field

[0001] This utility model belongs to the field of container equipment, and in particular relates to a lockable screw-type container twist lock. Background Technology

[0002] In practical applications, a standard twist lock connects the top and bottom corner fittings of two containers. However, the locked bottom corner fittings, twist lock, and top corner fittings cannot be pressed together to generate pre-tension force; gaps exist between them to facilitate the traditional twist lock's rotational locking operation. Because of these gaps between the container corner fittings and the twist lock, during container transport, vibrations and impacts cause slight displacement between the connected corner fittings and the twist lock, resulting in continuous minor collisions, impacts, and friction.

[0003] When the goods transported inside a container are highly sensitive to friction and vibration, such phenomena are unacceptable, and traditional center torsion locks cannot meet the requirements. In this case, a center torsion lock is needed that can eliminate gaps between the top corner fittings, the torsion lock, and the bottom corner fittings, while also generating pre-tensioning force between them. If the products transported inside the container are sensitive to impact and friction, traditional torsion locks cannot generate pre-tensioning force, and their gap-filling structural characteristics cannot suppress the mutual slippage, friction, and minor impacts between the three components caused by vibration and impact during transportation, thus failing to meet the requirements of special products. Currently, there are no products on the market that meet these special requirements. Utility Model Content

[0004] In view of this, the present invention aims to propose a lockable screw-type container twist lock to solve the problems of existing technology, such as the inability to generate preload, the existence of gaps, and the inability to suppress mutual slippage, friction, and slight impact between the three components caused by vibration and impact during transportation.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A lockable screw-type container twist lock includes two lock heads, two housings, two positioning blocks, a central shaft, four fixing screws, and two anti-loosening screws; The central shaft extends through both the housing and the lock head at both ends. The lock head is located on the outside of the housing. The housing is movably sleeved onto the central shaft. The lock head is threaded onto the central shaft. Both the upper and lower ends of the housing are connected to the positioning blocks. Both the left and right ends of the positioning blocks are connected to the housing. The housing and the positioning blocks are connected by fixing screws. The middle part of the positioning block is threadedly connected to an anti-loosening screw. The anti-loosening screw is connected to the middle part of the central shaft.

[0006] The upper end of the anti-loosening screw base is threaded externally, and the lower end of the anti-loosening screw base is machined into a smooth rod.

[0007] Furthermore, the central shaft includes a shaft, a disc, and a key. The disc is fitted onto the middle part of the shaft, and grooves are formed at the fitting parts of both. The two grooves overlap to form a slot, and the key is placed in the slot.

[0008] Furthermore, the central axis includes a shaft and a disk, with the disk located in the middle of the shaft, and the shaft and the disk being an integral structure.

[0009] Furthermore, several circular holes are formed along the circumference of the outer side of the disk.

[0010] Furthermore, external threads are provided at both ends of the shaft, and the external threads at the left and right ends of the shaft are left-hand threads and right-hand threads, respectively.

[0011] Furthermore, the diameter of the circular hole is adapted to the diameter of the smooth rod of the anti-loosening screw base, and the smooth rod of the anti-loosening screw base is inserted into the circular hole.

[0012] Furthermore, the lock head has an internal thread, and the internal thread of the lock head is adapted to the external thread of the shaft.

[0013] Furthermore, the lock head has an interface hole for the corner fitting, and the side of the lock head near the housing has a rectangular structure, which allows the lock head to be secured in the corner fitting hole.

[0014] Furthermore, the cross-section of the housing near the lock head is adapted to the bottom hole of the corner piece, the housing is locked in the corner piece hole, and a through hole is opened in the middle of the housing, the through hole being penetrated by the central axis.

[0015] Compared with the prior art, the lockable screw-type container twist lock of this utility model has the following advantages: (1) It still has the basic function of traditional center twist lock, that is, to connect and fix the upper corner piece and the lower corner piece together, and all dimensions meet the standard corner piece size requirements.

[0016] (2) When tightening and locking, the screw-type torsion lock can achieve small gradient locking, which is low in cost and simple and reliable in structure.

[0017] (3) The upper corner piece, lower corner piece and twist lock can be locked together, which can generate a large preload force.

[0018] (4) After the preload is generated, it has an anti-loosening function and the preload can be maintained.

[0019] (5) After pre-tightening, the upper corner piece, lower corner piece, and middle torsion lock become a whole, which has the ability to transmit tensile and bending torque.

[0020] (6) The locking and anti-loosening operation tools are unified, and the locking and anti-loosening are achieved with extremely simple tools, making the operation simple. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is an exploded view of the twist lock structure described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the lock head structure described in an embodiment of the present utility model; Figure 3 This is a top view of the shell structure described in an embodiment of the present utility model; Figure 4 This is a bottom view of the shell structure described in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the central shaft structure described in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the split-type central shaft structure described in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the positioning block structure according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the torsion lock structure in the unlocked state as described in an embodiment of the present invention; Figure 9 This is a schematic diagram of the twist lock and corner piece structure in the unlocked state according to an embodiment of the present utility model; Figure 10 This is a front cross-sectional view of the unlocked state as described in an embodiment of the present invention; Figure 11 This is a schematic left-side cross-sectional view of the unlocked state as described in an embodiment of the present invention; Figure 12 This is a schematic diagram of the torsion lock structure in the locking state according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of the torsion lock and corner piece structure in the locking state as described in an embodiment of this utility model; Figure 14 This is a front cross-sectional view of the locking state as described in an embodiment of the present invention; Figure 15 This is a left-side cross-sectional view of the locking state as described in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1. Central shaft; 2. Housing; 3. Lock head; 4. Positioning block; 5. Fixing screw; 6. Anti-loosening screw. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 15 As shown, a lockable screw-type container twist lock includes two lock heads 3, two housings 2, two positioning blocks 4, a central shaft 1, four fixing screws 5 and two anti-loosening screws 6.

[0027] In a preferred embodiment of this utility model, both ends of the central shaft 1 penetrate the housing 2 and the lock head 3. The lock head 3 is located outside the housing 2. The housing 2 is movably sleeved with the central shaft 1, and the lock head 3 is threadedly sleeved with the central shaft 1. Both the upper and lower ends of the housing 2 are connected to the positioning block 4, and both the left and right ends of the positioning block 4 are connected to the housing 2. The housing 2 and the positioning block 4 are connected by fixing screws 5. The middle part of the positioning block 4 is threadedly connected to the anti-loosening screw 6, and the anti-loosening screw 6 is connected to the middle part of the central shaft 1. In this embodiment, the middle positioning block 4 connects and fixes the housing 2 at both ends and provides support. The fixing screws 5 connect and fix the middle positioning block 4 to the housing 2 together, and the anti-loosening screw 6 controls whether the central shaft 1 can rotate, thus preventing loosening.

[0028] In a preferred embodiment of this utility model, the central shaft 1 includes a shaft, a disk, and a key. The disk is fitted onto the middle part of the shaft, and both fitting portions have grooves. Two grooves overlap to form a retaining groove, and the key is placed in the retaining groove. In this embodiment, the central shaft 1 adopts a discrete structure. By placing the key into the retaining groove to lock the shaft and the disk, relative sliding or rotation between the shaft and the disk is prevented. The discrete structure reduces costs.

[0029] In a preferred embodiment of this utility model, the central shaft 1 includes a shaft and a disk, the disk being disposed in the middle of the shaft, and the shaft and disk being an integral structure. In this embodiment, the central shaft 1 adopts an integral structure, which simplifies the operation steps in practical applications.

[0030] In a preferred embodiment of this utility model, the upper end of the anti-loosening screw 6 base is provided with an external thread, and the lower end of the anti-loosening screw 6 base is machined into a smooth rod; several circular holes are provided along the circumference of the outer side of the disc; the diameter of the circular holes is adapted to the diameter of the smooth rod of the anti-loosening screw 6 base, and the smooth rod of the anti-loosening screw 6 base is inserted into the circular holes. In this embodiment, several circular holes are left on the side of the disc, and a rod-shaped tool can be inserted into the circular holes and rotated around the axis to realize the locking and loosening operations. The circular holes on the side of the disc, in conjunction with the positioning block 4, allow the smooth rod of the anti-loosening screw 6 base to be inserted into the circular holes, which can prevent the central shaft 1 from rotating relative to the positioning block 4, thus achieving anti-loosening after the central shaft 1 is locked. The combination of the anti-loosening screw 6 and the circular holes can achieve graded anti-loosening and small-gradient locking, which has the advantages of simple and reliable structure.

[0031] In a preferred embodiment of this utility model, both ends of the shaft are provided with external threads, and the external threads at the left and right ends of the shaft are left-hand threads and right-hand threads, respectively; the lock head 3 is provided with internal threads, and the internal threads of the lock head 3 are adapted to the external threads of the shaft. In this embodiment, when the central shaft 1 rotates, the two lock heads 3 can move in opposite directions along the central shaft 1 simultaneously, thereby locking and loosening the two corner pieces.

[0032] In a preferred embodiment of this utility model, the lock head 3 adapts to the interface hole of the corner fitting. The lock head 3 has a rectangular structure on the side near the housing 2, and the lock head 3 is secured in the corner fitting hole through the rectangular structure. The cross-section of the housing 2 on the side near the lock head 3 adapts to the bottom hole of the corner fitting, and the housing 2 is secured in the corner fitting hole. A through hole is opened in the middle of the housing 2, and the through hole is penetrated by the central shaft 1. In this embodiment, the envelope length, width, and height of the lock head 3 match the interface hole size of the standard corner fitting. When the lock head 3 is fully inserted into the corner fitting hole, it rotates 90°, and the rectangular cross-section is precisely secured in the corner fitting hole. When the central shaft 1 rotates, the lock head 3 will not rotate. When the central shaft 1 is tightened, the rotation of the lock head 3 is still restricted and will not self-rotate. The lock head 3 itself achieves anti-loosening. When the central shaft 1 rotates, the housing 2 will not rotate either.

[0033] The working principle of this utility model is as follows: Locking principle: Locking is achieved using the lead screw and nut principle; Anti-loosening principle: Anti-loosening screws are used to prevent loosening.

[0034] The structural features of this utility model are as follows: The components have a simple structure; the structure matches the standard corner pieces well; the screws are standard parts; and the tools for tightening and loosening are simple.

[0035] The advantages and beneficial effects of this utility model are as follows: (1) It still has the basic function of traditional center twist lock, that is, to connect and fix the upper corner piece and the lower corner piece together, and all dimensions meet the standard corner piece size requirements.

[0036] (2) When tightening and locking, the screw-type torsion lock can achieve small gradient locking, which is low in cost and simple and reliable in structure.

[0037] (3) The upper corner piece, lower corner piece and twist lock can be locked together, which can generate a large preload force.

[0038] (4) After the preload is generated, it has an anti-loosening function and the preload can be maintained.

[0039] (5) After pre-tightening, the upper corner piece, lower corner piece, and middle torsion lock become a whole, which has the ability to transmit tensile and bending torque.

[0040] (6) The locking and anti-loosening operation tools are unified, and the locking and anti-loosening are achieved with extremely simple tools, making the operation simple.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lockable screw-type container twist lock, characterized in that: It includes two lock heads (3), two housings (2), two positioning blocks (4), a central shaft (1), four fixing screws (5) and two anti-loosening screws (6); The central shaft (1) has its left and right ends passing through the housing (2) and the lock head (3). The lock head (3) is located outside the housing (2). The housing (2) is movably sleeved with the central shaft (1). The lock head (3) is threadedly sleeved with the central shaft (1). The upper and lower ends of the housing (2) are connected to the positioning block (4). The left and right ends of the positioning block (4) are connected to the housing (2). The housing (2) and the positioning block (4) are connected by a fixing screw (5). The middle part of the positioning block (4) is threadedly connected to an anti-loosening screw (6). The anti-loosening screw (6) is connected to the middle part of the central shaft (1). The upper end of the base of the anti-loosening screw (6) is provided with an external thread, and the lower end of the base of the anti-loosening screw (6) is machined into a smooth rod.

2. A lockable screw-type container twist lock according to claim 1, characterized in that: The central shaft (1) includes a shaft, a disc, and a key. The disc is fitted into the middle of the shaft, and grooves are provided at the fitting parts of both. The two grooves overlap to form a slot, and the key is placed in the slot.

3. A lockable screw-type container twist lock according to claim 1, characterized in that: The central shaft (1) includes a shaft and a disk, the disk being located in the middle of the shaft, and the shaft and the disk being an integral structure.

4. A lockable screw-type container twist lock according to claim 2 or 3, characterized in that: Several circular holes are formed along the circumference of the outer side of the disk.

5. A lockable screw-type container twist lock according to claim 2 or 3, characterized in that: The shaft has external threads at both ends, and the external threads at the left and right ends of the shaft are left-hand threads and right-hand threads, respectively.

6. A lockable screw-type container twist lock according to claim 4, characterized in that: The diameter of the circular hole is adapted to the diameter of the smooth rod of the anti-loosening screw (6) base, and the smooth rod of the anti-loosening screw (6) base is inserted into the circular hole.

7. A lockable screw-type container twist lock according to claim 5, characterized in that: The lock head (3) has an internal thread, and the internal thread of the lock head (3) is adapted to the external thread of the shaft.

8. A lockable screw-type container twist lock according to claim 1, characterized in that: The lock head (3) is adapted to the interface hole of the corner piece. The lock head (3) has a rectangular structure on the side near the housing (2). The lock head (3) is locked in the corner piece hole through the rectangular structure.

9. A lockable screw-type container twist lock according to claim 1, characterized in that: The cross section of the housing (2) near the lock head (3) is adapted to the bottom hole of the corner piece. The housing (2) is inserted into the corner piece hole. A through hole is opened in the middle of the housing (2). The through hole is penetrated by the central shaft (1).

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