Container state detection device

Abstract

The utility model discloses a container state detection device, and relates to the technical field of logistics. The container state detection device comprises a stand column, a first driving assembly and a detection assembly. The first driving assembly is installed on the upper portion of the stand column. The detection assembly is connected with the first driving assembly and can be driven by the first driving assembly to move in the first direction so as to detect the state of goods in the container, and the first direction intersects with the height direction of the stand column. Therefore, the container state detection device disclosed by the utility model can identify the container state and improve the safety and reliability of loading and unloading operation.

Description

Technical Field

[0001] This application relates to the field of logistics technology, specifically to a cargo box status detection device. Background Technology

[0002] Current logistics lines, by integrating advanced automated loading and unloading systems, are now able to achieve rapid, unmanned loading and unloading operations, greatly improving loading and unloading efficiency and saving labor costs.

[0003] However, current automated loading and unloading systems have certain limitations. For example, they cannot identify the quantity and arrangement of goods in a container, or whether there are foreign objects inside. In such cases, the automated loading and unloading system may operate on empty containers, resulting in wasted resources, or it may load and unload improperly arranged goods, leading to damage and affecting the integrity and value of the goods. In addition, foreign objects or improperly arranged goods in the container may also damage the forklift rail equipment, thereby increasing equipment maintenance costs. Utility Model Content

[0004] In view of this, this application provides a cargo container status detection device that can identify the status of the cargo container and improve the safety and reliability of loading and unloading operations.

[0005] The specific technical solution adopted in this application is as follows:

[0006] This application provides a cargo box status detection device, the device including a column, a first drive assembly and a detection assembly;

[0007] The first drive assembly is installed on the upper part of the column;

[0008] The detection component is connected to the first drive component and can be driven by the first drive component to move along a first direction to detect the cargo box status, wherein the first direction intersects the height direction of the column.

[0009] Optionally, the first drive assembly includes a first connector and a first drive member, the first connector being connected to the column, the first drive member being mounted on the first connector, and at least a portion of the first drive member being reciprocating in the first direction;

[0010] The detection component is connected to the movable part of the first driving component.

[0011] Optionally, the first driving component includes a lead screw, a servo motor, and a nut seat;

[0012] The lead screw is mounted on the first connector and extends along the first direction. The lead screw can be driven to rotate by the servo motor, wherein the rotation axis of the lead screw is parallel to the first direction.

[0013] The nut seat is sleeved on the lead screw and can reciprocate in the first direction as the lead screw rotates. The detection component is mounted on the nut seat.

[0014] Optionally, the first connector includes a horizontal plate and two supports. One side of the horizontal plate is connected to the column, and the two supports are fixed at intervals to the other side of the horizontal plate. Each support has a shaft hole, and the one side plate and the other side plate face each other.

[0015] The servo motor is connected to the horizontal plate and to one end of the lead screw; the lead screw passes through the shaft holes of the two supports and can rotate in the shaft holes; the nut seat is located between the two supports.

[0016] Optionally, a bearing is installed in the shaft hole of the support, and the lead screw passes through and is fixed in the inner hole of the bearing.

[0017] Optionally, the first connector further includes a guide rail fixed to the horizontal plate, the guide rail and the two supports being located on the same side surface of the horizontal plate, and the guide rail extending along the first direction;

[0018] The nut seat has a guide groove on the side facing the guide rail, and the guide groove slides within the guide rail.

[0019] Optionally, the first driving component includes a first outer sleeve and a first telescopic rod. The first outer sleeve is fixed to the column by the first connector. The telescopic direction of the first telescopic rod is parallel to the first direction. The detection component is mounted on the first telescopic rod.

[0020] Optionally, the first drive assembly is hinged to the column;

[0021] The device further includes a second driving component, which drives the first driving component to rotate the detection component around the hinge axis, thereby changing the angle between the first direction and the height direction of the column, wherein the hinge axis is perpendicular to the first direction and perpendicular to the height direction of the column.

[0022] Optionally, the second drive assembly includes a second drive member, which includes a second outer sleeve and a second telescopic rod. The end of the second telescopic rod is hinged to the end of the first drive assembly. The second telescopic rod can extend and retract relative to the second outer sleeve in a second direction, which is perpendicular to the hinge axis and intersects with the first direction.

[0023] Optionally, the second drive assembly includes a second connector, which is fixed relative to the column, and the second outer sleeve is fixed to the second connector.

[0024] The cargo container status detection device provided in this application embodiment utilizes a first driving component installed on the upper part of the column to drive the detection component to move in a first direction. This allows the detection component to detect the cargo container status at different positions in the first direction, determining whether the container is empty, whether the goods inside are neatly arranged, and whether there are foreign objects inside. Therefore, the cargo container status detection device provided in this application embodiment can more clearly and comprehensively identify the cargo container status, significantly improving the safety and reliability of loading and unloading operations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a cargo box status detection device provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a first driving component provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of another cargo box status detection device provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of a second driving component provided in an embodiment of this application.

[0030] Figure label:

[0031] 1. Columns;

[0032] 2. First drive assembly; 21. First connector; 211. Horizontal plate; 212. Support; 2121. Shaft hole; 213. Guide rail; 22. First drive component; 221. Lead screw; 222. Servo motor; 223. Nut seat; 2231. Guide groove; 224. First outer sleeve; 225. First telescopic rod;

[0033] 3. Detection components;

[0034] 4. Second drive assembly; 41. Second drive component; 411. Second outer sleeve; 412. Second telescopic rod; 42. Second connector. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0037] Automated loading and unloading systems in related technologies have certain limitations. One such limitation is their inability to identify the condition of cargo containers, such as the quantity and arrangement of goods inside, or the presence of foreign objects. Therefore, during operation, forklifts may load and unload empty containers, resulting in resource waste; they may also load and unload improperly arranged goods, leading to further displacement or collapse, or even damage to the goods caused by the forks colliding with them. Furthermore, if foreign objects are present in the containers, such as leftover tools or damaged packaging materials, these objects may damage the goods or forklifts during loading and unloading. Damaged equipment requires repair or replacement, increasing maintenance costs and downtime, and reducing loading and unloading efficiency.

[0038] To address the above problems, embodiments of this application provide a cargo box status detection device, such as... Figure 1 As shown, the cargo box status detection device includes a column 1, a first drive assembly 2, and a detection assembly 3.

[0039] The column 1 is usually fixed on the ground or tabletop and is used to install the first drive component 2 and the detection component 3.

[0040] The first drive assembly 2 is installed on the upper part of the column 1, and the detection assembly 3 is connected to the first drive assembly 2. It should be understood that the upper part of the column 1 refers to the portion of the column 1 with a relatively higher spatial height after installation, or the portion above the center point of the column 1. Thus, the installed detection assembly 3 can be located at a high position in the space, enabling it to detect the state of the goods inside the cargo box from the top opening, i.e., to detect the state of the cargo box.

[0041] The detection component 3 can be driven by the first drive component 2 to move along a first direction to detect the state of the goods inside the cargo box from different angles and angles, wherein the first direction intersects the height direction of the column 1. After installation, the height direction of the column 1 is usually the same as the height direction of the cargo box.

[0042] Therefore, the cargo box status detection device provided in this application embodiment utilizes the first driving component 2 installed on the upper part of the column 1 to drive the detection component 3 to move in a first direction. Thus, the detection component 3 can detect the cargo box status at different positions in the first direction to determine whether the cargo box is empty, whether the goods inside are neatly arranged, and whether there are foreign objects inside the cargo box. Therefore, the cargo box status detection device provided in this application embodiment can more clearly and comprehensively identify the cargo box status, significantly improving the safety and reliability of loading and unloading operations.

[0043] In some embodiments of this application, the detection component 3 includes a lidar and a data processor. The lidar is mounted on the first driving component 2 and calculates the distance between the cargo and the lidar by emitting laser pulses and receiving their reflected signals, thereby acquiring three-dimensional point cloud data of the cargo. This data can be used to accurately measure the cargo's volume, weight, and other key parameters. The data processor is connected to the lidar signal, enabling it to acquire the parameters collected by the lidar and analyze the state of the cargo inside the container based on these parameters.

[0044] In this embodiment, the first driving component 2 drives the lidar to move back and forth along a first direction above the cargo box, enabling the lidar to scan the cargo inside and obtain three-dimensional point cloud data of the cargo based on the scanning results. The lidar then transmits the obtained data to a data processor, which analyzes and determines whether there is cargo inside the cargo box, whether the cargo's arrangement is regular and meets requirements, and whether there are foreign objects inside the cargo box.

[0045] In some other embodiments of this application, the detection component 3 may also include a camera and a data processor. The camera is mounted on the first drive component 2. As the first drive component 2 moves the camera along the first direction, the camera can capture video or photos of the interior of the cargo box and send the captured video or photos to the data processor for analysis, synthesis, and processing to generate a panoramic image of the interior of the cargo box in the first direction. This panoramic image is used to identify whether there are goods inside the cargo box, whether the goods are arranged neatly and in accordance with requirements, and to detect whether there are foreign objects inside the cargo box.

[0046] Therefore, by supplementing the existing automated loading and unloading system with the cargo box status detection device provided in this application embodiment, the automated detection and loading / unloading of cargo boxes can be realized. By feeding back the detection results of the detection component 3 in the cargo box status detection device to the automated loading and unloading system, it is possible to avoid forklift equipment from handling or loading / unloading empty cargo boxes, as well as to avoid damage to goods and forklift equipment during the loading and unloading process, thus significantly improving the safety and reliability of loading and unloading operations.

[0047] In some embodiments of this application, such as Figure 1 As shown, the first drive assembly 2 includes a first connector 21 and a first drive member 22. The first connector 21 is connected to the column 1, the first drive member 22 is mounted on the first connector 21, and at least a portion of the first drive member 22 can reciprocate in a first direction; the detection assembly 3 is connected to the movable portion of the first drive member 22.

[0048] The first drive assembly 2 is connected to the upper part of the column 1 via the first connector 21. The first connector 21 and the column 1 can be fixedly connected by bolts, welding, riveting, or movablely connected by hinges, sliding connections, etc. At least a portion of the first drive assembly 22 can reciprocate relative to the column 1 in a first direction, and the detection assembly 3 is connected to the movable portion of the first drive assembly 22. Thus, the detection assembly 3 can be driven when at least a portion of the first drive assembly 22 moves, thereby enabling scanning or photographing of the interior of the cargo box at various positions in the first direction.

[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, the first driving component 22 is an electric lead screw mechanism, including a lead screw 221, a servo motor 222, and a nut seat 223. The lead screw 221 is mounted on the first connecting member 21 and extends along a first direction. The nut seat 223 is sleeved on the lead screw 221, wherein the nut seat 223 has an internal thread, and the lead screw 221 has an external thread, with the internal and external threads meshing with each other. The servo motor 222 is used to drive the lead screw 221 to rotate, and the rotation axis of the lead screw 221 is parallel to the first direction, wherein as the lead screw 221 rotates, the nut seat 223 can reciprocate in the first direction. The detection component 3 is mounted on the nut seat 223 and moves synchronously with the nut seat 223.

[0050] The electric lead screw mechanism converts the rotational motion of the servo motor 222 output into the linear reciprocating motion of the nut seat 223 in the first direction, thus realizing the movement control of the detection component 3 mounted on the nut seat 223. This electric lead screw mechanism has a simple and compact structure, requires no air or oil lines, has high reliability, high control accuracy, and good synchronization. Furthermore, by simply changing the lead screw 221 of different lengths, the linear motion stroke of the detection component 3 can be altered, thus adapting to cargo boxes of different lengths and dimensions, providing excellent flexibility.

[0051] Optionally, the first drive unit 22 may also include a reduction gear disposed between the output end of the servo motor 222 and the lead screw 221. The reduction gear is used to convert the high-speed rotation of the servo motor 222 into a low-speed, high-torque output, thereby achieving precise motion control.

[0052] like Figure 2As shown, in some embodiments of this application, the first connecting member 21 includes a horizontal plate 211 and two supports 212. One side of the horizontal plate 211 is connected to the column 1, and the connection method can be a fixed connection method or a movable connection method as described above. The two supports 212 are fixed at intervals on the other side of the horizontal plate 211, and each support 212 has a shaft hole 2121. A servo motor 222 is connected to the horizontal plate 211 and connected to one end of a lead screw 221. The lead screw 221 passes through the shaft holes 2121 of the two supports 212 and can be driven by the servo motor 222 to rotate in the shaft holes 2121. A nut seat 223 is located between the two supports 212.

[0053] The two supports 212, through their shaft holes 2121, serve to limit the lead screw 221 in the radial direction. Along the radial direction of the lead screw 221, the lead screw 221 is constrained within the shaft holes 2121 of the two supports 212, thereby preventing the lead screw 221 from drifting due to axis of rotation displacement during rotation driven by the servo motor 222, which would cause instability in the position of the detection component 3 and thus affect the detection results.

[0054] In some embodiments, the diameter of the shaft hole 2121 of the support 212 is slightly larger than the diameter of the lead screw 221, and the lead screw 221 is clearance-fitted with the shaft hole 2121, thereby limiting the position of the lead screw 221. In other embodiments, a bearing is installed in the shaft hole 2121 of the support 212. The bearing has an inner hole, through which the lead screw 221 passes and is fixed. The lead screw 221 can rotate relative to the support 212 based on the bearing, thus the bearing limits the position of the lead screw 221.

[0055] Meanwhile, the two supports 212 also limit the movement of the nut seat 223 in the first direction. The nut seat 223 is located between the two supports 212. When the nut seat 223 moves away from the servo motor 222 along the first direction and comes into contact with one of the supports 212, the nut seat 223 is prevented from moving further; that is, the support 212 limits the nut seat 223 to the furthest position it can move relative to the servo motor 222 in the first direction. When the nut seat 223 moves closer to the servo motor 222 along the first direction and comes into contact with the other support 212, the nut seat 223 is prevented from moving further; that is, the support 212 limits the nut seat 223 to the closest position it can move relative to the servo motor 222 in the first direction. This prevents the nut seat 223 from disengaging from the lead screw 221 during movement, thus ensuring the safety and reliability of the device.

[0056] In some embodiments of this application, such as Figure 2As shown, the first connecting member 21 also includes a guide rail 213 fixed on the horizontal plate 211. The guide rail 213 and the two supports 212 are located on the same side plate surface of the horizontal plate 211, and the guide rail 213 extends along the first direction. The nut seat 223 is provided with a guide groove 2231 on the side facing the guide rail 213, and the guide groove 2231 slides limited to the guide rail 213.

[0057] By setting a guide rail 213 extending along the first direction on the horizontal plate 211 and making the nut seat 223 slide in contact with the guide rail 213, the movement direction of the nut seat 223 can be restricted to the first direction by the guide rail 213. That is, the guide rail 213 plays the role of guiding and limiting, thus improving the stability of the nut seat 223 during linear movement.

[0058] In other embodiments of this application, the first driving member 22 may be a telescopic mechanism such as an electric push rod or a telescopic motor. Figure 3 As shown, the first driving component 22 includes a first outer sleeve 224 and a first telescopic rod 225. The first outer sleeve 224 is sleeved on the outside of the first telescopic rod 225, and one end of the first telescopic rod 225 protrudes from one side of the first outer sleeve 224. The first telescopic rod 225 can extend and retract relative to the first outer sleeve 224 in a first direction. The first outer sleeve 224 is fixed to the column 1 by a first connector 21, and the detection component 3 is installed on the first telescopic rod 225.

[0059] The aforementioned telescopic mechanism is capable of telescopic movement in the first direction, thereby driving the detection component 3 to reciprocate along the first direction. Compared to the electric lead screw mechanism, the telescopic mechanism has a simpler structure, is easier to install, and is easier to control.

[0060] In some embodiments of this application, such as Figure 1 As shown, the first drive assembly 2 is hinged to the column 1. For example, the horizontal plate 211 in the first drive assembly 2 has a through hole, and the column 1 also has a through hole. The hinge shaft passes through the through hole on the horizontal plate 211 and the through hole on the column 1, thereby hinged the horizontal plate 211 to the column 1.

[0061] In this configuration, the cargo container status detection device may further include a second drive assembly 4, which drives the first drive assembly 2 to rotate the detection assembly 3 around the hinge axis, thereby changing the angle between the first direction and the height direction of the column 1. The hinge axis refers to the axis of the hinge shaft, which is perpendicular to the first direction and also perpendicular to the height direction of the column 1.

[0062] Thus, driven by the second drive component 4, the first drive component 2 can drive the detection component 3 to rotate, thereby changing the height of the detection component 3 in the height direction of the column 1 to adapt to cargo boxes of different heights. For example, in Figure 1Based on the shown state, if the height of the cargo box to be detected increases and exceeds the height of detection component 3, then detection component 3 cannot detect the interior of the cargo box. In this case, the second drive component 4 can be used to drive the first drive component 2 to rotate counterclockwise around the hinge axis by a certain angle, thereby raising the position of detection component 3 so that detection component 3 can scan or photograph the interior of the taller cargo box. Figure 1 Based on the state shown, if the height of the cargo box to be detected is reduced and the distance from the detection component 3 is relatively far, the detection component 3 may not be able to accurately identify the details inside the cargo box. In this case, the second drive component 4 can be used to drive the first drive component 2 to rotate clockwise around the hinge axis by a certain angle, thereby lowering the position of the detection component 3, so that the detection component 3 can scan or photograph the situation inside the lower cargo box more clearly.

[0063] In some embodiments, the second drive assembly 4 includes a second drive member 41, which may be a lifting mechanism or a telescopic mechanism. Taking a telescopic mechanism as an example, the second drive member 41 includes a second outer sleeve 411 and a second telescopic rod 412. The second outer sleeve 411 is sleeved on the outside of the second telescopic rod 412. The end of the second telescopic rod 412 is hinged to the end of the first drive assembly 2. The second telescopic rod 412 can extend and retract relative to the second outer sleeve 411 in a second direction, which is perpendicular to the hinge axis and intersects with the first direction. Thus, by controlling the extension and retraction of the second drive member 41, the first drive assembly 2 can be driven to rotate, thereby changing the height position of the detection assembly 3 and achieving more accurate and clear cargo box status detection.

[0064] In some embodiments of this application, the second drive assembly 4 further includes a second connector 42, which is fixed relative to the column 1, and the second outer sleeve 411 is fixed on the second connector 42.

[0065] "The second connector 42 is fixed relative to the column 1" means that after the cargo box status detection device is installed, the position of the second connector 42 and the position of the column 1 are relatively stationary. For example, both the second connector 42 and the column 1 can be fixed to the ground or a table, or, as... Figure 4 As shown, the second connector 42 can also be fixedly connected to the column 1.

[0066] The second connector 42 is used to fix the position of the second outer sleeve 411, which ensures the stability of the second drive component 4 during its movement and helps to improve the detection accuracy of the detection component 3.

[0067] In summary, the cargo box status detection device provided in this application embodiment utilizes a first driving component 2 installed on the upper part of the column 1 to drive the detection component 3 to move in a first direction. This allows the detection component 3 to detect the cargo box status at different positions in the first direction, determining whether the cargo box is empty, whether the goods inside are neatly arranged, and whether there are foreign objects inside. For cargo boxes of different heights, a second driving component 4 can be used to drive the first driving component 2 to rotate, thereby changing the height position of the detection component 3 in space, facilitating a clearer and more accurate detection of the cargo box's internal condition. Therefore, the cargo box status detection device provided in this application embodiment can more clearly and comprehensively identify the cargo box status and can adapt to cargo boxes of different heights, significantly improving the safety and reliability of loading and unloading operations.

[0068] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing 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 this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0069] The above description is only for the purpose of enabling those skilled in the art to understand the technical solution of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cargo container status detection device, characterized in that, The device includes a column (1), a first drive assembly (2), and a detection assembly (3); The first drive assembly (2) is installed on the upper part of the column (1); The detection component (3) is connected to the first drive component (2) and can be driven by the first drive component (2) to move along a first direction to detect the cargo box status, wherein the first direction intersects the height direction of the column (1).

2. The apparatus according to claim 1, characterized in that, The first drive assembly (2) includes a first connector (21) and a first drive member (22). The first connector (21) is connected to the column (1). The first drive member (22) is mounted on the first connector (21), and at least a portion of the first drive member (22) can reciprocate in the first direction. The detection component (3) is connected to the movable part of the first drive component (22).

3. The apparatus according to claim 2, characterized in that, The first driving component (22) includes a lead screw (221), a servo motor (222), and a nut seat (223); The lead screw (221) is mounted on the first connector (21) and extends along the first direction. The lead screw (221) can be driven to rotate by the servo motor (222), wherein the rotation axis of the lead screw (221) is parallel to the first direction. The nut seat (223) is sleeved on the lead screw (221) and can reciprocate in the first direction as the lead screw (221) rotates. The detection component (3) is installed on the nut seat (223).

4. The apparatus according to claim 3, characterized in that, The first connector (21) includes a horizontal plate (211) and two supports (212). One side of the horizontal plate (211) is connected to the column (1), and the two supports (212) are fixed at intervals on the other side of the horizontal plate (211). Each support (212) has a shaft hole (2121). The servo motor (222) is connected to the horizontal plate (211) and connected to one end of the lead screw (221); the lead screw (221) passes through the shaft hole (2121) of the two supports (212) and can rotate in the shaft hole (2121); the nut seat (223) is located between the two supports (212).

5. The apparatus according to claim 4, characterized in that, A bearing is installed in the shaft hole (2121) of the support (212), and the lead screw (221) passes through and is fixed in the inner hole of the bearing.

6. The apparatus according to claim 4, characterized in that, The first connector (21) further includes a guide rail (213) fixed on the horizontal plate (211), the guide rail (213) and the two supports (212) are located on the same side surface of the horizontal plate (211), and the guide rail (213) extends along the first direction; The nut seat (223) is provided with a guide groove (2231) on the side facing the guide rail (213), and the guide groove (2231) slides within the guide rail (213).

7. The apparatus according to claim 2, characterized in that, The first driving component (22) includes a first outer sleeve (224) and a first telescopic rod (225). The first outer sleeve (224) is fixed to the column (1) by the first connector (21). The telescopic direction of the first telescopic rod (225) is parallel to the first direction. The detection component (3) is installed on the first telescopic rod (225).

8. The apparatus according to any one of claims 1-7, characterized in that, The first drive assembly (2) is hinged to the column (1); The device further includes a second drive assembly (4), which drives the first drive assembly (2) to rotate the detection assembly (3) around the hinge axis, thereby changing the angle between the first direction and the height direction of the column (1), wherein the hinge axis is perpendicular to the first direction and perpendicular to the height direction of the column (1).

9. The apparatus according to claim 8, characterized in that, The second drive assembly (4) includes a second drive member (41), which includes a second outer sleeve (411) and a second telescopic rod (412). The end of the second telescopic rod (412) is hinged to the end of the first drive assembly (2). The second telescopic rod (412) can extend and retract relative to the second outer sleeve (411) in a second direction, which is perpendicular to the hinge axis and intersects with the first direction.

10. The apparatus according to claim 9, characterized in that, The second drive assembly (4) includes a second connector (42) which is fixed relative to the column (1), and the second outer sleeve (411) is fixed on the second connector (42).

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