Small-spacing retaining lock device and method for retaining container

Abstract

During locking, a user steps on a locking foot bar, the locking foot bar drives a first shaft to rotate clockwise, a locking pressing plate and a second spring bolt to rotate clockwise in the same direction and pushes the first spring bolt to rotate until the locking pressing plate, the second spring bolt and the first spring bolt are all in a vertical state, rotation is stopped, and at the moment, the locking foot bar is locked; the upper portion of the first spring bolt penetrates through the through groove, the first spring bolt and the second spring bolt are in a crossed state, and the elastic piece is in a compressed state. During unlocking, a user steps on the locking pedal, the unlocking pedal drives the first shaft to rotate anticlockwise, the locking pressing plate, the second spring bolt and the first spring bolt topple towards the heading direction, assembling is conducted through the quick-release connector assembly, and quick connection and separation with the sliding rail can be achieved; unlocking and locking are achieved by stepping on the locking foot bar and the unlocking pedal, the traditional operation mode that a user needs to bend down to press manually is changed, cross matching of the two lock tongues can adapt to a smaller lock hole distance and can adapt to containers of different specifications, and universality is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of air cargo specialization, and relates to a small-spacing limit lock device and method for container restraint. Background Art

[0002] The limit lock device is provided for the civil aircraft cargo system and is usually installed in the standard floor slide rail for reliable restraint of the container in the longitudinal or reverse longitudinal direction and the vertical direction during air transportation. By reasonably arranging the limit device, accurate locking of the container at the corresponding loading position can be achieved.

[0003] In the prior art, Patent CN 202414165U discloses an air container limit lock, including a rectangular lock frame, a first shaft and a second shaft arranged in the lock frame. The first shaft is provided with a first lock body and a first compression spring for urging the first lock body to stand upright. The second shaft is provided with a second lock body and a second compression spring for pressing the second lock body flat in the rectangular lock frame. When the first lock body and the second lock body cross and stand upright, the convex block of the second lock body is located in the notch of the first lock body. This air container limit lock has the characteristics of simple structure, easy operation and good fixing effect. However, the locking and unlocking of this structure are achieved by pressing the lock body. There are hundreds of limit locks in the entire cargo system, and it is time-consuming and laborious to lock and unlock by bending down to press the lock body.

[0004] In the prior art, Patent US20120119052A1 discloses FUNCTION ELEMENT, METHOD FORPRODUCING A FUNCTION ELEMENT, including a new design of a functional element. The structural characteristics of the functional element include a fixed track with multiple protrusions and a movable fixing nail. When the fixing nail is in the blocking position, it can fix the position of the functional element in the seat track, but the installation of the fixing nail is cumbersome and not easy to disassemble.

[0005] Through the analysis of existing patents, the two-way limit device can achieve the two-way locking of the container within the range of 19 mm to 47 mm of the limit spacing, and the limit spacing is large. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art that the existing limit devices are cumbersome to install and not easy to disassemble during blocking and limiting, the locking or unlocking method remains unchanged, and the existing devices cannot adapt to smaller lock hole spacings, and to provide a small-spacing limit lock device for container restraint.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A small-pitch movement limiting lock device for limiting the movement of a container includes a lock housing, in which a first shaft and a second shaft are arranged in parallel, and a quick-release connector assembly is installed on the lock housing for connecting to the track to be assembled. A locking plate and a second locking tongue are provided on the first shaft. The locking plate is located on the side of the second locking tongue away from the second shaft. An elastic element is provided between the locking plate and the second locking tongue. An unlocking pedal and an upper locking lever are provided near the end of the first shaft. A first locking tongue is provided on the second shaft. A through groove is provided at the lower end of the second locking tongue, and the end of the first locking tongue away from the second shaft passes through the through groove; In the initial state, the locking plate, the second locking bolt, and the first locking bolt are tilted in the direction of travel and placed flat inside the lock case; When locking, step on the locking pedal. The locking pedal drives the first shaft to rotate clockwise. The locking plate and the second locking tongue rotate clockwise in the same direction and push the first locking tongue to rotate until the locking plate, the second locking tongue and the first locking tongue are all in a vertical state. At this time, the rotation stops. At this time, the upper part of the first locking tongue passes through the through groove, the first locking tongue and the second locking tongue are in a cross state, and the elastic element is in a compressed state. When unlocking, step on the unlocking pedal. The unlocking pedal drives the first shaft to rotate counterclockwise, and the locking plate, the second locking tongue, and the first locking tongue tilt in the direction of travel, returning to their initial state.

[0008] A further improvement of the present invention is that: A limiting groove is provided on the side of the second locking tongue away from the second shaft, a first inclined surface is provided at the upper end of the groove, and a second inclined surface is provided on the side of the first locking tongue away from the locking plate; When locked, the locking plate is embedded in the limiting groove, and the first inclined surface is in contact with the second inclined surface.

[0009] The locking plate includes a locking plate, and a locking block is provided on the side of the locking plate away from the second axis. The upper end of the locking block is a spring mounting surface, and a spring groove is provided on the spring mounting surface. The elastic element is installed in the spring groove. The second locking tongue is provided with a spring contact surface, which is located at the lower end of the limiting groove; When locked, the locking plate is embedded in the limiting groove, the lower end of the elastic element is connected to the spring groove, and the upper end abuts against the spring contact surface.

[0010] A locking foot housing is provided near the end of the first shaft, the unlocking pedal is located on one side of the locking foot housing, and the upper locking lever is located on the other side of the locking foot housing.

[0011] In the initial state, the angle between the unlocking pedal and the horizontal plane is less than or equal to 15°; When the locking pedal is pressed, the unlocking pedal rotates synchronously. When locking is complete, the circumferential rotation angle of the unlocking pedal is less than or equal to 120°.

[0012] A method for a small-pitch movement limiting lock device for a container as described in this invention includes the following steps: When locking, step on the locking pedal. The locking pedal drives the first shaft to rotate clockwise. The locking plate and the second locking tongue rotate clockwise in the same direction. The locking plate squeezes the elastic element during rotation. The locking plate and the second locking tongue cooperate to push the first locking tongue to rotate clockwise in the same direction until the locking plate, the second locking tongue and the first locking tongue are all in a vertical state. At this time, the rotation stops. At this time, the upper part of the first locking tongue passes through the through groove. The first locking tongue and the second locking tongue are in a cross state. The elastic element is in a compressed state and is squeezed between the locking plate and the second locking tongue. When unlocking, step on the lock pedal. The unlocking pedal drives the first shaft to rotate counterclockwise. The locking plate, the second latch, and the first latch all rotate counterclockwise simultaneously. The elastic element gradually extends until the locking plate, the second latch, and the first latch are all flat inside the lock case.

[0013] A small-pitch movement limiting lock system for limiting the movement of a container includes the movement limiting lock device and a slide rail as described in this invention. A slide rail has a groove, and the lower end of the quick-release connector assembly is placed in the slide groove. By moving the quick-release connector assembly to different positions within the slide, the lock housing can be unlocked and locked from the slide.

[0014] The quick-release connector assembly includes a twist plate, a boss is provided at the lower end of the twist plate, and a half-connector assembly is provided at the lower end of the boss. Both the boss and the twist plate are connected to the lock housing; The half-joint assembly is placed in the slide groove.

[0015] The lock housing has an installation slot, the twisting piece is located at the upper end of the installation slot, the boss is placed inside the installation slot, and the half-joint assembly is located at the lower end of the installation slot.

[0016] The slide includes a locking part, and the two ends of the locking part are unlocking parts; When the half-joint assembly moves to the locking part, the lock housing is in the locked state; When the half-joint assembly moves to the unlocking part, the lock case is in the unlocked state.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a small-pitch movement limiting lock device for container movement. This device is assembled using a quick-release connector assembly, enabling rapid connection and separation with the slide rail. Both unlocking and locking are achieved by stepping on the locking lever and unlocking pedal, changing the traditional operation mode that requires bending over and manually pressing. When locking, the container is locked by the cross-design of the first and second locking tongues in a vertical state. The cross-cooperation of the two locking tongues can accommodate smaller lock hole spacing, allowing this device to be adapted to containers of different sizes, thus increasing its flexibility and versatility.

[0018] Furthermore, in this invention, the elastic element is disposed within the spring groove. In the locked state, the lock plate is embedded in the limiting groove, the lower end of the elastic element is connected to the spring groove, and the upper end abuts against the spring contact surface, which enhances the stability of the two locking tongues when they are crossed and upright in the locked state, and ensures that there will be no relative movement between the limiting surfaces when they are under load.

[0019] Furthermore, in this invention, a locking foot housing is provided near the end of the first shaft, the unlocking pedal is located on one side of the locking foot housing, and the locking lever is located on the other side of the locking foot housing. In the initial state, the angle between the unlocking pedal and the horizontal plane is less than or equal to 15°. When the foot steps on the locking lever, the unlocking pedal rotates synchronously. When unlocking is completed, the circumferential rotation angle of the unlocking pedal is less than or equal to 120°. By setting the angle, the movement stroke is optimized, avoiding mechanical interference or wear caused by excessive rotation, while ensuring that the locking and unlocking states can be switched within a sufficient range of motion, thereby improving the unlocking and locking efficiency.

[0020] The present invention also discloses a small-pitch movement limiting lock system for container movement limiting, wherein the half-joint assembly realizes a reliable connection between the lock and the slide rail, improves the efficiency and reliability of lock installation and removal, and facilitates later maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 The structure of the small-pitch motion-limiting lock device disclosed in the embodiments of the present invention. Figure 1 ; Figure 2 The structure of the small-pitch motion-limiting lock device disclosed in the embodiments of the present invention. Figure 2 ; Figure 3a This is a schematic diagram of the locked state of the first and second locking tongues in the small-pitch movement limiting lock device disclosed in an embodiment of the present invention; Figure 3b This is a schematic diagram of the unlocked states of the first and second latches in the small-pitch movement-limiting lock device disclosed in an embodiment of the present invention; Figure 4a This is a schematic diagram of the installation of the elastic element in the small-pitch motion-limiting lock device disclosed in an embodiment of the present invention; Figure 4b This is a schematic diagram of the installation of the elastic element in the small-pitch motion-limiting lock device disclosed in an embodiment of the present invention; Figure 4c This is a schematic diagram of the installation of the elastic element in the small-pitch motion-limiting lock device disclosed in an embodiment of the present invention; Figure 5 The second locking tongue structure in the small-pitch movement-limiting lock device disclosed in the embodiments of the present invention Figure 1 ; Figure 6 The second locking tongue structure in the small-pitch movement-limiting lock device disclosed in the embodiments of the present invention Figure 2 ; Figure 7 Figure 3 shows the structure of the second locking tongue in the small-pitch movement-limiting lock device disclosed in an embodiment of the present invention; Figure 8 The locking plate structure in the small-pitch movement limiting lock device disclosed in the embodiments of the present invention. Figure 1 ; Figure 9 The locking plate structure in the small-pitch movement limiting lock device disclosed in the embodiments of the present invention. Figure 2 ; Figure 10 Figure 3 shows the structure of the locking plate in the small-pitch motion-limiting lock device disclosed in this embodiment of the invention; Figure 11 Figure 4 shows the structure of the locking plate in the small-pitch motion-limiting lock device disclosed in this embodiment of the invention; Figure 12 The first locking tongue structure in the small-pitch movement-limiting lock device disclosed in the embodiments of the present invention. Figure 1 ; Figure 13 The first locking tongue structure in the small-pitch movement-limiting lock device disclosed in the embodiments of the present invention. Figure 2 ; Figure 14 Figure 3 shows the structure of the first locking tongue in the small-pitch movement-limiting lock device disclosed in an embodiment of the present invention; Figure 15 This is a schematic diagram of the unlocked state of the small-pitch motion-limiting lock device disclosed in an embodiment of the present invention, in which the first and second locking tongues are located below the height of the transmission plane. Figure 16 This is a structural diagram of the quick-release connector assembly in the small-pitch motion-limiting lock device disclosed in an embodiment of the present invention; Figure 17 This is a diagram of the slide rail structure disclosed in an embodiment of the present invention; Figure 18 This is a schematic diagram of the quick-release connector assembly disclosed in an embodiment of the present invention. Figure 1 ; Figure 19 This is a schematic diagram of the quick-release connector assembly disclosed in an embodiment of the present invention. Figure 2 ; Wherein: 1-lock housing; 2-first locking bolt; 3-second locking bolt; 4-quick release connector assembly; 5-locking pressure plate; 6-unlocking pedal; 7-locking lever; 8-first shaft; 9-second shaft; 10-elastic element; 11-; 17-unlocking part; 18-locking part; 21-Third limiting surface; 22-First limiting surface; 23-Second inclined surface; 31-Fourth limiting surface; 32-Second limiting surface; 33-First inclined surface; 34-Spring contact surface; 35-Through groove; 36-Limiting groove; 41-Half-joint assembly; 42-Boss; 43-Nut; 44-Torsion plate; 45-Disc spring; 51-Spring mounting surface; 52-Lock block; 53-Lock plate; 54-Spring groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention 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 the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 the present invention according to the specific circumstances.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1 to 19 Based on factors such as the availability of various types of containers compatible with a certain civil aircraft cargo system, light weight, convenient and time-saving restriction and release of restriction, and easy replacement after damage, this invention discloses a small-pitch restriction locking device for container restriction. This device can be locked and unlocked by foot, improving the loading and unloading efficiency of containers. Through the reliable connection and separation of the quick-release connector assembly with the slide rail, it can be adapted to containers in different loading positions. Moreover, the restriction surface spacing is small, specifically, it can achieve bidirectional locking of containers with a restriction spacing in the range of 15.2mm to 25.4mm.

[0030] See Figures 1 to 2 This invention discloses a small-pitch movement limiting lock device for limiting the movement of a container, including a lock housing 1, a first shaft 8 and a second shaft 9 arranged in parallel inside the lock housing 1, and a quick-release connector assembly 4 arranged on the lock housing 1, the quick-release connector assembly 4 being used to connect to the track to be assembled. A locking plate 5 and a second locking tongue 3 are provided on the first shaft 8. The locking plate 5 is located on the side of the second locking tongue 3 away from the second shaft 9. An elastic element 10 is provided between the locking plate 5 and the second locking tongue 3. An unlocking pedal 6 and an upper locking lever 7 are provided near the end of the first shaft 8. A first locking tongue 2 is provided on the second shaft 9. The lower end of the second locking tongue 3 has a through groove 35, and the end of the first locking tongue 2 away from the second shaft 9 passes through the through groove 35; In the initial state, the locking plate 5, the second locking bolt 3, and the first locking bolt 2 are tilted in the direction of travel and placed flat inside the lock housing 1. (See below) Figure 3b ; When locking, stepping on the locking pedal 7 causes the first shaft 8 to rotate clockwise. The locking plate 5 and the second latch 3 rotate in the same direction, pushing the first latch 2 to rotate until the locking plate 5, the second latch 3, and the first latch 2 are all in a vertical position. At this point, the rotation stops. The upper part of the first latch 2 passes through the through groove 35, the first latch 2 and the second latch 3 are in a crossed state, and the elastic element 10 is in a compressed state. (See [reference]). Figure 3a ; When unlocking, step on the locking pedal 6. The unlocking pedal 6 drives the first shaft 8 to rotate counterclockwise, and the locking plate 5, the second locking tongue 3 and the first locking tongue 2 tilt in the direction of travel, returning to the initial state.

[0031] Specifically, in this embodiment, a limiting groove 36 is provided on the side of the second locking tongue 3 away from the second shaft 9, a first inclined surface 33 is provided at the upper end of the through groove 35, and a second inclined surface 23 is provided on the side of the first locking tongue 2 away from the locking plate 5. The first inclined surface 33 and the second inclined surface 23 are parallel, so that when the upper end of the first locking tongue 2 passes through the through groove 35, the first inclined surface 33 and the second inclined surface 23 fit tightly together, and the first locking tongue 2 and the second locking tongue 3 maintain a cross-standing upright state.

[0032] See Figures 5-7 and Figures 2-14 Furthermore, in this embodiment, the upper ends of both the first locking tongue 2 and the second locking tongue 3 are curved portions at a certain angle to the main body itself. Specifically: The first locking tongue 2 includes a first upright part and a first curved part that are smoothly connected. The inner side of the first upright part away from the second locking tongue 3 is a first limiting surface 22, and the lower end surface of the first curved part is a third limiting surface 21. The third limiting surface 21 and the first limiting surface 22 are vertically distributed.

[0033] The second locking tongue 3 includes a second upright part and a second curved part that are smoothly connected. The inner side of the second upright part away from the first locking tongue 2 is the second limiting surface 32, and the lower end surface of the second curved part is the fourth limiting surface 31. The second limiting surface 32 and the fourth limiting surface 31 are vertically distributed between each other.

[0034] When locked, the third limiting surface 21 and the fourth limiting surface 31 can effectively limit the movement of the container in the vertical direction.

[0035] The small distance between the first limiting surface 22 and the second limiting surface 32 enables bidirectional locking within the range of 15.2mm to 25.4mm, effectively limiting the movement of the container along the heading and in the reverse direction.

[0036] See Figures 8-11 Furthermore, in this embodiment, the specific structure of the locking plate 5 is as follows: During installation, both the locking plate 5 and the second locking tongue 3 are provided with connecting holes. The second locking tongue 3 is sleeved on the outside of the locking plate 5, and the first shaft 8 passes through the connecting holes on the locking plate 5 and the second locking tongue 3 in sequence.

[0037] The locking plate 5 includes a locking plate 53. A locking block 52 is provided on the side of the locking plate 53 away from the second shaft 9. The upper end of the locking block 52 is a spring mounting surface 51. A spring groove 54 is provided on the spring mounting surface 51. The elastic element 10 is installed in the spring groove 54. A spring contact surface 34 is provided on the second locking tongue 3. The spring contact surface 34 is located at the lower end of the limiting groove 36. In the locked state, the locking plate 53 is embedded in the limiting groove 36, the lower end of the elastic element 10 is connected to the spring groove 54, and the upper end abuts against the spring contact surface 34. Figures 4a-4c .

[0038] Furthermore, there is a certain angle between the spring mounting surface 51 and the spring contact surface 34, so that when the locking plate rotates, the compression of the elastic element 10 will only increase and not decrease, thereby ensuring that the elastic element 10 will not dislodge during rotation. In this embodiment, the elastic element 10 is a spring.

[0039] Furthermore, in this embodiment, the mounting structure of the unlocking pedal 6 and the locking lever 7 is as follows: A locking foot housing is provided near the end of the first shaft 8. A connecting hole is provided on the locking foot housing. The locking foot housing is sleeved on the first shaft 8 through the connecting hole. A pin hole 13 is provided on the locking foot housing. A pin is installed in the pin hole 13. The locking foot housing and the first shaft 8 are assembled and connected by the pin.

[0040] The unlocking pedal 6 is located on one side of the pedal housing, and the locking lever 7 is located on the other side. The unlocking pedal 6 and the locking lever 7 are offset from each other in the longitudinal direction by an angle between 100° and 180°. When the foot is pressed on the locking lever 7, the pedal rotates clockwise, and the unlocking pedal 6 rotates clockwise to a convenient position. Similarly, when the foot is pressed on the unlocking pedal 6, the pedal rotates counterclockwise, and the locking lever 7 rotates counterclockwise to a convenient position.

[0041] In the initial state, the unlocking pedal 6 is within a 15-degree angle to the horizontal plane, and the angle through which the pedal rotates from the initial position to the end position does not exceed 120 degrees.

[0042] When the operator steps on the locking lever 7, the first shaft 8 rotates in the forward direction. The first shaft 8 will drive the locking plate 5 to rotate clockwise. The locking plate 5 will start to squeeze the elastic element between itself and the second locking tongue 3. While compressing the elastic element 10, it will push the locking tongue to start rotating around its own axis.

[0043] When the movement restriction needs to be released, the operator steps on the unlocking pedal 6, and the first shaft 8 rotates in the opposite direction, causing the locking plate 5 to rotate counterclockwise. This releases the pressure on the elastic element 10, causing the elastic element 10 to extend and drive the locking tongue to rotate. When both locking tongues fall down, the locking tongues lose their inclined support and fall down under the action of gravity, ensuring that the top of the locking tongues is lowered below the cargo hold floor transfer plane, so that the container can be transferred.

[0044] This embodiment also discloses a method for a small-pitch movement limiting lock for limiting the movement of a container, including the following steps: When locked, stepping on pedal 7 rotates the first shaft 8, causing the locking plate 5 to rotate clockwise upwards. The spring between the locking plate 5 and the second latch 3 is compressed, and the head of the first latch 2 protrudes from the through groove 35 at the bottom of the second latch 3. The locking plate 5 is embedded in the limiting groove 36 on the side of the second latch 3. The first inclined surface 33 and the second inclined surface 23 are in contact, and the first latch 2 and the second latch 3 are crossed and upright. The spring between the locking plate 5 and the second latch 3 provides friction, thereby stabilizing the small-pitch limiting lock mechanism.

[0045] The force transmission path is as follows: various loads generated by the container are transmitted to the motion limiting device, then to the quick-release joint assembly, then to the slide rail, and finally to the main load-bearing frame beam of the aircraft.

[0046] In the unlocked state, pressing the foot pedal 6 rotates the first shaft 8, causing the locking plate 5 to rotate counterclockwise downwards from the lower limiting groove 36 of the second locking tongue 3. The spring between the locking plate 5 and the second locking tongue 3 extends, causing the second locking tongue 3 to fall in the navigating direction, which in turn causes the first locking tongue 2 to fall in the navigating direction as well. This unlocks the small-pitch limiting lock mechanism. Furthermore, the height of the fallen locking tongue is lower than the overall transport plane height of the freight system, facilitating container transport. (See [reference]). Figure 15 .

[0047] The present invention also discloses a small-pitch movement limiting lock system for limiting the movement of a container, including the movement limiting lock device and the slide rail in the embodiment of the present invention. The slide rail has a slide groove, and the quick-release connector assembly 4 is placed in the slide groove. Moving the quick-release connector assembly 4 to the corresponding position completes the unlocking and locking of the lock housing 1 and the slide groove.

[0048] See Figure 16 Furthermore, the quick-release connector assembly 4 has the following assembly structure: Includes a twist plate 44, a boss 42 is provided at the lower end of the twist plate 44, a disc spring 45 is provided below the boss 42, and a half-joint assembly 41 is provided at the lower end of the disc spring 45; Furthermore, the lock housing 1 has an installation through groove, including a first groove 11 and a second groove 12 distributed from top to bottom. The boss 42 on the toggle piece slides along the first groove 11 inside the lock housing 1 to realize installation and disassembly. The half-joint assembly 41 passes through the hole between the bottom bosses of the small-pitch limit lock and installs two butterfly spring washers. The toggle piece 44 is fixed by the nut 43.

[0049] See Figures 17 to 19 Furthermore, the slide rail includes a locking part 18, with unlocking parts 17 at both ends. When the half-joint assembly 41 moves from the unlocking part 17 to the locking part 18, the twisting piece 44 is tightened to lock it. If the small-pitch limiting lock device needs to be disassembled, simply rotate the twisting piece 44 to drive the half-joint assembly 41, so that the half-joint assembly 41 is released from between the two grooves 18 and moved to the slide rail groove 17 for removal.

[0050] When the half-connector assembly 41 moves to the locking part 18, the lock housing 1 is in a locked state; when the half-connector assembly 41 moves to the unlocking part 17, the lock housing 1 is in an unlocked state.

[0051] The structure disclosed in this invention is achieved by stepping on the locking pedal and the unlocking pedal. The entire freight system has hundreds of movement-limiting locks. Stepping on the locking and unlocking pedals saves time and effort and is safe and reliable.

[0052] This structure enables a reliable connection between the lock and the slide rail through a quick-release coupling assembly, improving the efficiency and reliability of lock installation and removal, and facilitating later maintenance.

[0053] The third limiting surface 21 and the fourth limiting surface 31 of this structure can effectively limit the movement of the container in the vertical direction. The small distance between the first limiting surface 22 and the second limiting surface 32 can achieve bidirectional locking within the range of 15.2mm to 25.4mm, which can effectively limit the movement of the container in both the heading and reverse directions.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A small-pitch movement limiting lock device for limiting the movement of a container, characterized in that, Includes a lock housing (1), in which a first shaft (8) and a second shaft (9) are arranged in parallel. The lock housing (1) is equipped with a quick-release connector assembly (4), which is used to connect the track to be assembled. A locking plate (5) and a second locking tongue (3) are provided on the first shaft (8). The locking plate (5) is located on the side of the second locking tongue (3) away from the second shaft (9). An elastic element (10) is provided between the locking plate (5) and the second locking tongue (3). An unlocking pedal (6) and an upper locking lever (7) are provided near the end of the first shaft (8). A first locking tongue (2) is provided on the second shaft (9). The lower end of the second latch (3) has a through groove (35), and the end of the first latch (2) away from the second shaft (9) passes through the through groove (35). In the initial state, the locking plate (5), the second locking tongue (3) and the first locking tongue (2) are tilted in the direction of travel and placed flat inside the lock case (1); When locking, step on the locking pedal (7), which drives the first shaft (8) to rotate clockwise. The locking plate (5) and the second locking tongue (3) rotate clockwise in the same direction, and push the first locking tongue (2) to rotate until the locking plate (5), the second locking tongue (3) and the first locking tongue (2) are all in a vertical state. At this time, the first locking tongue (2) has a through groove (35) at the top, the first locking tongue (2) and the second locking tongue (3) are in a cross state, and the elastic element (10) is in a compressed state. When unlocking, step on the locking pedal (6), and the unlocking pedal (6) drives the first shaft (8) to rotate counterclockwise. The locking plate (5), the second locking tongue (3) and the first locking tongue (2) tilt in the direction of travel and return to the initial state.

2. A small-pitch movement limiting lock device for limiting the movement of a container according to claim 1, characterized in that, The second locking tongue (3) has a limiting groove (36) on the side away from the second shaft (9), the upper end of the through groove (35) is provided with a first inclined surface (33), and the first locking tongue (2) has a second inclined surface (23) on the side away from the locking plate (5). When locked, the locking plate (5) is embedded in the limiting groove (36), and the first inclined surface (33) is in contact with the second inclined surface (23).

3. A small-pitch movement limiting lock device for limiting the movement of a container according to claim 2, characterized in that, The locking plate (5) includes a locking plate (53), and a locking block (52) is provided on the side of the locking plate (53) away from the second shaft (9). The upper end of the locking block (52) is a spring mounting surface (51), and a spring groove (54) is provided on the spring mounting surface (51). The elastic element (10) is installed in the spring groove (54). A spring contact surface (34) is provided on the second locking tongue (3), and the spring contact surface (34) is located at the lower end of the limiting groove (36); When locked, the locking plate (53) is embedded in the limiting groove (36), the lower end of the elastic element (10) is connected to the spring groove (54), and the upper end abuts against the spring contact surface (34).

4. A small-pitch movement limiting lock device for limiting the movement of a container according to claim 1, characterized in that, A locking foot housing is provided near the end of the first shaft (8), an unlocking pedal (6) is provided on one side of the locking foot housing, and an upper locking lever (7) is provided on the other side of the locking foot housing.

5. A small-pitch movement limiting lock device for limiting the movement of a container according to claim 4, characterized in that, In the initial state, the angle between the unlocking pedal (6) and the horizontal plane is less than or equal to 15°; When the foot steps on the locking pedal (7), the unlocking pedal (6) rotates synchronously. When locking is complete, the circumferential rotation angle of the unlocking pedal (6) is less than or equal to 120°.

6. A method for a small-pitch movement-limiting locking device for limiting the movement of a container as described in claim 1, characterized in that, Includes the following steps: When locking, step on the locking pedal (7), which drives the first shaft (8) to rotate clockwise. The locking plate (5) and the second locking tongue (3) rotate clockwise in the same direction. The locking plate (5) squeezes the elastic element (10) during rotation. The locking plate (5) and the second locking tongue (3) work together to push the first locking tongue (2) to rotate clockwise in the same direction until the locking plate (5), the second locking tongue (3) and the first locking tongue (2) are all in a vertical state. At this time, the upper part of the first locking tongue (2) passes through the through groove (35). The first locking tongue (2) and the second locking tongue (3) are in a cross state. The elastic element (10) is in a compressed state. The elastic element (10) is squeezed between the locking plate (5) and the second locking tongue (3). When unlocking, step on the lock pedal (6), and the unlocking pedal (6) drives the first shaft (8) to rotate counterclockwise. The lock pressure plate (5), the second lock tongue (3) and the first lock tongue (2) all rotate counterclockwise in sync. The elastic element (10) gradually extends until the pressure plate (5), the second lock tongue (3) and the first lock tongue (2) are all flat inside the lock shell (1).

7. A small-pitch movement limiting lock system for limiting the movement of a container, characterized in that, Includes the motion-limiting lock device and slide rail as described in claim 1, wherein a slide rail is provided with a slide groove and the lower end of the quick-release connector assembly (4) is placed in the slide groove; By moving the quick-release connector assembly (4) to different positions in the slide, the lock housing (1) can be unlocked and locked from the slide.

8. A small-pitch movement limiting lock system for container movement limiting according to claim 7, characterized in that, The quick-release connector assembly (4) includes a twist plate (44), a boss (42) is provided at the lower end of the twist plate (44), and a half connector assembly (41) is provided at the lower end of the boss (42). Both the boss (42) and the twist plate (44) are connected to the lock housing (1); The half-joint assembly (41) is placed in the groove.

9. A small-pitch movement limiting lock system for limiting the movement of a container according to claim 8, characterized in that, The lock housing (1) has an installation slot, the twist piece (44) is located at the upper end of the installation slot, the boss (42) is placed inside the installation slot, and the half connector assembly (41) is located at the lower end of the installation slot.

10. A small-pitch movement limiting lock system for container movement limiting according to claim 8, characterized in that, The slide includes a locking part (18), and the two ends of the locking part (18) are unlocking parts (17). When the half-connector assembly (41) moves to the locking part (18), the lock housing (1) is in a locked state; When the half-connector assembly (41) moves to the unlocking part (17), the lock case (1) is in the unlocked state.

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