A telescopic device for a container spreader

Abstract

The application discloses a telescopic device for a container lifting appliance, relates to the field of rail transit transportation, and is used for a suspension type container transportation system, and comprises a left telescopic assembly, a right telescopic assembly, a cross beam assembly and a guide plate assembly. The left telescopic assembly and the right telescopic assembly are connected through the cross beam assembly, so that the left telescopic assembly and the right telescopic assembly move synchronously and coordinately. The end of the left telescopic assembly and the end of the right telescopic assembly are both provided with the guide plate assembly, and a twist lock device is arranged in the guide plate assembly. The application realizes linkage of the left and right telescopic devices through the cross beam assembly, automatically corrects position error of the lifting appliance and the container top corner fitting, and ensures that the twist lock device of the lifting appliance can be automatically positioned with the top corner fitting.

Description

Technical Field

[0001] This invention relates to the field of rail transportation, specifically to a telescopic device for a container spreader, and is used in suspended container transport systems. Background Technology

[0002] The statements in this section are provided only as background information in connection with this disclosure and may not constitute prior art.

[0003] There are three main lifting methods for container loading and unloading: top lifting, side lifting, and top hoisting. In places with high throughput such as docks, yards, and railway freight yards, top lifting has gradually replaced other lifting methods, including side lifting and top hoisting, and has become the current popular lifting method.

[0004] Container spreaders generally adopt an integral structure, mainly consisting of a steel structure, a twist-lock mechanism, a guiding mechanism, and a wire rope pulley block. Four twist-lock mechanisms are fixedly installed at the four corners of the spreader, responsible for docking with the container. Four guiding mechanisms are installed above the twist-lock devices to assist in positioning and docking the spreader with the container. Some simple guiding mechanisms are also installed on the side of the steel structure. The wire rope pulley block is responsible for connecting with the crane. By controlling the crane trolley and lifting mechanism, the spreader can be raised, lowered, and moved back and forth.

[0005] Due to limitations in existing integrated container spreader structures, if a suspended container transport system uses the existing top-lift method, the integrated container spreader must be integrated onto the container transport vehicle. Each transport vehicle needs to be equipped with a spreader and lifting mechanism, resulting in the container transport vehicle requiring both a main frame and a spreader structure; it also requires the installation of both a vehicle running mechanism and a spreader lifting mechanism. This integrated transport vehicle and crane setup leads to complex vehicle structure, large weight, high manufacturing and transportation costs, and poor economic efficiency. Furthermore, this structure primarily uses container corner brackets for fixation, but these corner brackets are generally unsuitable for transport operations. On the transport vehicle, the container can only be supported by the four bottom corner brackets or the load transfer area in the bottom structure. Since the main strength of the container comes from the bottom beam, horizontal movement of the container should be restricted by bolting the bottom corner brackets; therefore, the use of corner brackets for transport has poor applicability.

[0006] For the reasons mentioned above, in order to meet the requirements of container transportation and securing, our company has developed a loading and unloading system specifically for suspended container transport systems. This system can be deployed in the loading and unloading areas of container terminals, yards, and railway freight yards. After the AGV trolleys, trucks, or railway flatcars transporting containers are parked longitudinally under the track beam of the suspended container transport system, the container loading and unloading device lifts the containers onto the suspended container transport vehicles, which then transport them to their destination. Upon arrival at the destination, the container loading and unloading device then lifts the containers from the suspended transport vehicles onto the AGV trolleys, trucks, or railway flatcars parked directly below, completing a full container loading, unloading, and transportation process.

[0007] However, due to the randomness of the parking positions of AGV trolleys, trucks, and railway flatcars, there are linear position errors and angular position errors in their relative positions with the spreaders; and the general guiding mechanisms are relatively simple and cannot adapt to complex working environments, resulting in the inability of the turnlock device and the top corner of the container to be accurately positioned. Summary of the Invention

[0008] The purpose of this invention is to address the problems existing in the prior art by providing a telescopic device for container spreaders. This device achieves linkage between the left and right telescopic components through a crossbeam assembly, automatically corrects the positional error between the spreader and the top corner piece of the container, and ensures that the twist lock device of the spreader can automatically position itself with the top corner piece, thus solving the aforementioned problems.

[0009] The technical solution of the present invention is as follows:

[0010] A telescopic device for container spreaders, comprising:

[0011] The left telescopic component and the right telescopic component are connected by a crossbeam assembly, so that the left telescopic component and the right telescopic component can move synchronously and in coordination.

[0012] Guide plate assembly, wherein the ends of the left telescopic assembly and the right telescopic assembly are each equipped with a guide plate assembly, and the guide plate assembly is provided with a rotary locking device;

[0013] The guide plate assembly and crossbeam assembly ensure precise positioning of the turnlock device and the top corner fittings of the container.

[0014] Furthermore, both the left telescopic assembly and the right telescopic assembly consist of at least three telescopic arms.

[0015] Furthermore, both the left telescopic assembly and the right telescopic assembly consist of a primary telescopic arm, a final telescopic arm, and several intermediate telescopic arms.

[0016] The primary telescopic arms of the left telescopic assembly and the right telescopic assembly are connected by a crossbeam assembly.

[0017] Guide plate assemblies are provided on the final telescopic arms of both the left and right telescopic components.

[0018] Furthermore, the primary telescopic arm is provided with a universal hinge assembly for connecting with the lifting trolley frame, allowing the left and right telescopic assemblies to rotate freely around the hinge point.

[0019] Furthermore, the beam assembly includes:

[0020] The first crossbeam and the second crossbeam are respectively hinged to the first-stage telescopic arms of the left telescopic assembly and the right telescopic assembly.

[0021] The first axis hinge connects the first crossbeam and the second crossbeam.

[0022] The first axis hinge can connect the first crossbeam and the second crossbeam, and also ensure that the first crossbeam and the second crossbeam can rotate along the axis of the first axis hinge. When the container and the track beam are not placed parallel, resulting in a certain angle between the container and the track beam, the longitudinal distance between the top corner pieces on both sides of the container and the corresponding guide plate assembly is inconsistent. The existence of the first axis hinge allows the telescopic arm on one side to move outward according to the guidance of the guide plate assembly, without driving the guide plate assembly on the other side to move outward at the same time, ensuring that the guide plate assemblies on both sides can be positioned with the top corner pieces.

[0023] Furthermore, a hinge seat is provided at the upper end of the primary telescopic arm;

[0024] The first crossbeam and the second crossbeam are hinged to the hinge seat via a second shaft hinge.

[0025] The second axis hinge can constrain the left telescopic assembly and the right telescopic assembly to move synchronously in the lateral direction. When the guide plate assembly on one side of the telescopic arm contacts the top corner piece of the container and begins to guide and correct the position deviation, the guide plate assembly on the other side of the telescopic arm can be driven to move together through the crossbeam assembly, so that the two guide plate assemblies can simultaneously guide the rotary lock device to position with the top corner piece of the container.

[0026] Further, the guide plate assembly includes:

[0027] A power system connection interface is provided, through which the power of the lifting device can be output to the guide plate assembly;

[0028] A rotary lock device connection interface, which is used to install a rotary lock device;

[0029] Longitudinal guide plate, which can adjust the longitudinal placement error of the container;

[0030] A transverse guide plate, which can adjust the transverse placement error of the container.

[0031] Furthermore, the guide plate assembly is provided with two rotary locking device connection interfaces, and a total of two rotary locking devices are installed;

[0032] The longitudinal guide plate is positioned between the two rotary locking devices.

[0033] Furthermore, each of the telescopic arms is equipped with:

[0034] Cable guide ring, which is used to constrain the power and control cables of the lifting device;

[0035] A reinforcing flange is provided at the lower end of each telescopic arm section. While ensuring the direction of movement of the telescopic arm, the flange strengthens the lower opening of the telescopic arm and serves as a second anti-detachment structure for the next telescopic arm section.

[0036] The guide ring is set inside each telescopic arm section. While ensuring the movement direction of the telescopic arm, it limits the movement of the next telescopic arm section and also serves as the first anti-detachment structure for the next telescopic arm section.

[0037] The slide plate is provided with the inner wall of each telescopic arm to reduce the sliding resistance between the telescopic arms and to adjust the straightness of the telescopic arms during processing;

[0038] Anti-detachment flange, which is installed at the upper end of each telescopic arm section, is used to prevent the telescopic arm from falling off from the previous telescopic arm section and to strengthen the upper orifice of the telescopic arm.

[0039] Furthermore, it also includes:

[0040] The first push rod and the second push rod are disposed between the telescopic boom and the lifting trolley frame, and can control the telescopic boom to move in the longitudinal and lateral directions, so as to realize the active positioning of the telescopic boom.

[0041] Compared with existing technologies, the advantages of this invention are:

[0042] A telescopic device for container spreaders enables the linkage of the left and right telescopic devices through a crossbeam assembly, automatically corrects the positional error between the spreader and the top corner piece of the container, and ensures that the spreader's rotary locking device can be automatically positioned with the top corner piece. Attached Figure Description

[0043] Figure 1 This is a structural schematic diagram of a telescopic device for a container spreader.

[0044] Figure 2 This is a schematic diagram illustrating the use of a telescopic device for a container spreader.

[0045] Figure 3This is a structural schematic diagram of the beam assembly;

[0046] Figure 4 This is a schematic diagram showing a situation where the container and the track beam are not placed parallel to each other.

[0047] Figure 5 This is a schematic diagram of the guide plate assembly.

[0048] Figure 6 This is a structural diagram showing the guide plate assembly used for positioning with two corner pieces between two containers;

[0049] Figure 7 A schematic diagram showing the structure after the guide plate assembly is positioned with the two corner pieces between the two containers;

[0050] Figure 8 This is a schematic diagram of the telescopic arm.

[0051] Reference numerals: 1-Lifting trolley, 2-Rail beam, 3-Telescopic device, 4-Container, 5-Transport vehicle, 131-Crossbeam assembly, 132-Universal hinge assembly, 133-First push rod, 134-Second push rod, 135-First stage telescopic boom, 136-Intermediate stage telescopic boom, 137-Final stage telescopic boom, 138-Guide plate assembly, 139-Turkey lock device, 1311-First crossbeam, 1312-Second shaft hinge, 1313-First shaft hinge, 1381-Longitudinal guide plate, 1382-Transverse guide plate, 1383-Reinforcing rib, 1384-Power system connection interface, 1385-Intermediate guide plate, 1361-Cable guide ring, 1362-Reinforcing flange, 1363-Guide ring, 1364-Slide plate, 1365-Anti-detachment flange. Detailed Implementation

[0052] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0054] Example 1

[0055] The container handling system is deployed in the loading and unloading areas of the container terminal, yard, and railway freight yard, such as... Figure 2 As shown, after the AGV trolley, truck or railway flatcar or other transport vehicle 5 for transporting container 4 is parked longitudinally under the track beam 2 of the suspended container 4 transport system, the container 4 loading and unloading device lifts the container 4 onto the suspended container 4 transport vehicle, and transports it to the destination by the suspended transport vehicle; after arriving at the destination, the container 4 loading and unloading device lifts the container 4 from the suspended transport vehicle onto the AGV trolley, truck or railway flatcar or other transport vehicle 5 parked directly below it, completing a complete container 4 loading, unloading and transport process.

[0056] Since the parking position of the transport vehicle 5 is random, there are linear position errors and angular position errors in its relative position with the spreader. The function of the telescopic device 3 proposed in this invention is to ensure that the rotary locking device 139 can be successfully positioned with the top corner piece of the container 4 within a certain error range.

[0057] The loading and unloading system of the suspended container transport system generally consists of 3 lifting trolleys 1. Each lifting trolley 1 is equipped with a set of telescopic devices 3. Each set of telescopic devices 3 is responsible for positioning with the two corner pieces at one end of the container 4. When lifting 2 containers 4 at the same time, the telescopic device 3 in the middle needs to be positioned with the four corner pieces between the two containers 4 placed side by side.

[0058] In this embodiment, for details, please refer to... Figure 1 A telescopic device for container spreaders is used to be installed on the lifting trolley 1 of a loading and unloading system. It controls the rotary locking device 139 to descend and rise along a designed path, corrects the relative positional error between the rotary locking device 139 and the top corner fittings of the container 4, and achieves positioning with the top corner fittings of the container 4. Specifically, it includes the following structure:

[0059] The left telescopic component and the right telescopic component are connected by a crossbeam assembly 131, so that the left telescopic component and the right telescopic component move synchronously and in coordination.

[0060] Guide plate assembly 138, the ends of the left telescopic assembly and the right telescopic assembly are both equipped with guide plate assembly 138, and a rotary lock device 139 is provided inside the guide plate assembly 138;

[0061] The guide plate assembly 138 and the crossbeam assembly 131 ensure the precise positioning of the rotary lock device 139 and the top corner piece of the container 4.

[0062] In this embodiment, specifically, both the left telescopic assembly and the right telescopic assembly consist of at least three telescopic arms.

[0063] In this embodiment, specifically, both the left and right telescopic components consist of a primary telescopic boom 135, a final telescopic boom 137, and several intermediate telescopic booms 136. It should be noted that the intermediate telescopic booms 136 primarily extend the telescopic length. Depending on the lifting distance and positioning accuracy requirements of the lifting device, an appropriate number of intermediate telescopic booms 136 can be arranged to meet the lifting height and positioning accuracy requirements of the lifting device. Preferably, as shown... Figure 1 As shown, both the left telescopic assembly and the right telescopic assembly consist of one primary telescopic arm 135, one final telescopic arm 137, and three intermediate telescopic arms 136.

[0064] The first-stage telescopic arms 135 of the left telescopic assembly and the right telescopic assembly are connected by a crossbeam assembly 131.

[0065] Guide plate assemblies 138 are provided on the final telescopic arms 137 of both the left telescopic assembly and the right telescopic assembly.

[0066] In this embodiment, specifically, the first-stage telescopic arm 135 is provided with a universal joint assembly 132 for connecting with the frame of the lifting trolley 1, so that the left telescopic assembly and the right telescopic assembly can rotate freely around the hinge point; preferably, the universal joint assembly 132 adopts a ball joint structure.

[0067] In this embodiment, specifically, such as Figure 3 As shown, the crossbeam assembly 131 includes:

[0068] The first crossbeam 1311 and the second crossbeam are respectively hinged to the first-stage telescopic arm 135 of the left telescopic assembly and the right telescopic assembly.

[0069] The first axis hinge 1313 is used to hinge the first crossbeam 1311 and the second crossbeam.

[0070] The first hinge 1313 can connect the first crossbeam 1311 and the second crossbeam, and also ensure that the first crossbeam 1311 and the second crossbeam can rotate along the axis of the first hinge 1313. When the container 4 on the transport vehicle 5 is not placed parallel to the track beam 2, resulting in a certain angle between the container 4 and the track beam 2, the longitudinal distance between the corner pieces on both sides of the container 4 and the corresponding guide plate assembly 138 will be inconsistent, which will cause abnormal positioning of the guide plate assembly 138 on both sides. If there is no first hinge 1313, positioning according to the position of one corner piece will cause the other corner piece to be unable to be positioned. Figure 4As shown, the lifting trolley 1 is positioned according to the corner piece closest to the center of container 4 along the longitudinal direction. When the guide plate assembly 138 contacts the corner piece far from the center, it will push the telescopic arm to move outward. The telescopic arm drives the crossbeam assembly 131 to move, and the crossbeam assembly 131 drives the telescopic arm on the other side to move outward together. The distance between the guide plate assembly 138 on the other side and the corner piece of container 4 increases, and the positioning fails. However, the presence of the first shaft hinge 1313 allows the telescopic arm on one side to move outward according to the guidance of the guide plate assembly 138 without driving the guide plate assembly 138 on the other side to move outward at the same time, ensuring that the guide plate assemblies 138 on both sides can be positioned with the corner piece.

[0071] In this embodiment, specifically, a hinge seat is provided at the upper end of the first-stage telescopic arm 135;

[0072] The first crossbeam 1311 and the second crossbeam are hinged to the shaft hinge seat via the second shaft hinge 1312.

[0073] The second shaft hinge 1312 can constrain the left telescopic assembly and the right telescopic assembly to move synchronously in the lateral direction. When the guide plate assembly 138 on one side of the telescopic arm contacts the top corner piece of the container 4 and begins to guide and correct the position deviation, the guide plate assembly 138 on the other side of the telescopic arm can be driven to move together through the crossbeam assembly 131, so that the two guide plate assemblies 138 can simultaneously guide the rotary lock device 139 to position with the top corner piece of the container 4.

[0074] In this embodiment, specifically, such as Figure 5 As shown, the guide plate assembly 138 includes:

[0075] The power system connection interface 1384 allows the power of the spreader to be output to the guide plate assembly 138, and then applied to the container 4 via the rotary locking device 139 to control the lifting and lowering of the container 4. Preferably, the power system connection interface 1384 includes, but is not limited to, a wire rope system connection interface and a screw system connection interface. In this embodiment, the power system connection interface 1384 is a wire rope system connection interface.

[0076] A rotary lock device connection interface, wherein the rotary lock device connection interface is used to install the rotary lock device 139;

[0077] Longitudinal guide plate 1381, which can adjust the longitudinal placement error of container 4;

[0078] A transverse guide plate 1382 is provided to adjust the transverse placement error of the container 4; preferably, a reinforcing rib 1383 is provided on the back of the transverse guide plate 1382.

[0079] In this embodiment, specifically, such as Figure 6As shown, when the guide plate assembly 138 is used to position the two corner pieces between the two containers 4, the guide plate assembly 138 is provided with two rotary locking device connection interfaces, and a total of two rotary locking devices 139 are installed.

[0080] The longitudinal guide plate 1381 is positioned between the two rotary locking devices 139, serving as an intermediate guide plate 1385. When lifting a container 4, the intermediate guide plate deflects to the right or left according to the position of the container 4. Figure 6 As shown; when lifting two containers 4, the middle guide plate is adjusted to a vertical position, as shown. Figure 7 As shown.

[0081] In this embodiment, specifically, such as Figure 8 As shown, it should be noted that the components of each telescopic boom are basically the same, differing only in size. The telescopic boom extends downwards by its own weight, and is driven upwards by the wire rope or screw drive of the lifting trolley 1. Specifically, each telescopic boom is equipped with:

[0082] Cable guide ring 1361, the cable guide ring 1361 is used to constrain the power and control cables of the lifting device;

[0083] A reinforcing flange 1362 is provided at the lower end of each telescopic arm section. While ensuring the direction of movement of the telescopic arm, the flange 1362 strengthens the strength of the lower opening of the telescopic arm and serves as the second anti-detachment structure for the next telescopic arm section.

[0084] Guide ring 1363 is set inside each telescopic arm section. Under the premise of ensuring the movement direction of the telescopic arm, it limits the next telescopic arm section and serves as the first anti-detachment structure for the next telescopic arm section.

[0085] The slide plate 1364 is provided with the inner wall of each telescopic arm to reduce the sliding resistance between the telescopic arms and to adjust the straightness of the telescopic arms during processing.

[0086] Anti-detachment flange 1365 is provided at the upper end of each telescopic arm section to prevent the telescopic arm from falling off from the previous telescopic arm section and to strengthen the strength of the upper orifice of the telescopic arm.

[0087] In this embodiment, specifically, it also includes:

[0088] The first push rod 133 and the second push rod 134 are disposed between the telescopic boom and the frame of the lifting trolley 1. (It should be noted that...) Figure 1Only one second push rod 134 is shown in the image (the other second push rod 134 is not shown). It can control the telescopic boom to move in the longitudinal and lateral directions, realizing the active positioning of the telescopic boom. Preferably, the first push rod 133 and the second push rod 134 include, but are not limited to, hydraulic push rods or electric push rods. That is, the telescopic boom can be controlled to return to the initial state by the first push rod 133 and the second push rod 134 to avoid the influence of external factors on the positioning of the telescopic boom. The use of an active positioning telescopic device can improve the hoisting efficiency and the range of correction error, and under certain circumstances, the longitudinal and lateral guide plates 1382 of the guide plate assembly 138 can be omitted. It should be noted that the first push rod 133 and the second push rod 134 can also be replaced with shock absorbers to absorb the longitudinal and lateral impacts on the telescopic boom. The telescopic device becomes a self-positioning device, and can also control the telescopic boom to return to the initial state to avoid the influence of external factors on the positioning of the telescopic boom.

[0089] In use, container 4 arrives at the container 4 loading and unloading device via transport vehicle 5. The loading and unloading system reads the position of container 4 and controls the suspended container 4 transport vehicle and the lifting trolley 1 to adapt to the position of container 4. The lifting trolley 1 controls the telescopic device 3 to descend through the transmission mechanism. The telescopic device 3 descends to near the top corner of container 4 by its own weight. Through the telescopic arm, crossbeam and other devices, the positions of the guide plate assemblies 138 on both sides and the top corner of container 4 are automatically adjusted to ensure that the turnlock devices 139 on both sides can dock with the top corner of container 4.

[0090] When the active positioning telescopic device 3 is used, the lifting trolley 1 and the transport trolley first position the container 4, controlling the lifting trolley 1 and the suspended transport vehicle to the appropriate position. The lifting trolley 1 controls the telescopic boom to descend. During the descent, the telescopic boom continuously adjusts the relative position of the twist lock device 139 and the top corner piece of the container 4 through the push rod on the telescopic boom, ensuring that the telescopic boom can be quickly positioned and improving lifting efficiency. After the twist lock device 139 locks the container 4, the push rod device unloads, ensuring that the container 4 is in a vertical state so that the container 4 can dock with the container 4 transport trolley.

[0091] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

[0092] This background section is provided to generally present the context of the invention. The work of the currently named inventors, the work to the extent described in this background section, and aspects of this section that did not constitute prior art at the time of application are neither expressly nor impliedly acknowledged as prior art to the invention.

Claims

1. A telescopic device for a container spreader, characterized in that, include: The left telescopic component and the right telescopic component are connected by a crossbeam assembly (131) so that the left telescopic component and the right telescopic component move synchronously and in coordination. Guide plate assembly (138), the ends of the left telescopic assembly and the right telescopic assembly are both equipped with guide plate assembly (138), and the guide plate assembly (138) is provided with a rotary lock device (139); The guide plate assembly (138) and the crossbeam assembly (131) ensure the precise positioning of the turnlock device (139) and the top corner piece of the container (4); The beam assembly (131) includes: The first crossbeam (1311) and the second crossbeam are respectively hinged to the first-stage telescopic arm (135) of the left telescopic assembly and the right telescopic assembly. The first axis hinge (1313) is used to hinge the first crossbeam (1311) and the second crossbeam. The first axis hinge (1313) can connect the first crossbeam (1311) and the second crossbeam, and also ensure that the first crossbeam (1311) and the second crossbeam can rotate along the axis of the first axis hinge (1313). When the container (4) and the track beam (2) are not placed parallel, resulting in a certain angle between the container (4) and the track beam (2), the longitudinal distance between the top corner pieces on both sides of the container (4) and the corresponding guide plate assembly (138) is inconsistent. The presence of the first axis hinge (1313) allows the telescopic arm on one side to move outward according to the guidance of the guide plate assembly (138), without driving the guide plate assembly (138) on the other side to move outward at the same time, ensuring that the guide plate assemblies (138) on both sides can be positioned with the top corner pieces. The upper end of the first-stage telescopic arm (135) is provided with a shaft hinge seat; The first crossbeam (1311) and the second crossbeam are hinged to the shaft hinge seat via the second shaft hinge (1312); The second axis hinge (1312) can constrain the left telescopic assembly and the right telescopic assembly to move synchronously in the lateral direction. When the guide plate assembly (138) on one side of the telescopic arm contacts the top corner piece of the container (4) and begins to guide and correct the position deviation, the guide plate assembly (138) on the other side of the telescopic arm can be driven to move together through the beam assembly (131), so that the two guide plate assemblies (138) simultaneously guide the rotary lock device (139) to position with the top corner piece of the container (4).

2. The telescopic device for a container spreader according to claim 1, characterized in that, Both the left and right telescopic components consist of at least three telescopic arms.

3. The telescopic device for a container spreader according to claim 2, characterized in that, Both the left telescopic assembly and the right telescopic assembly consist of a primary telescopic arm (135), a final telescopic arm (137), and several intermediate telescopic arms (136). The primary telescopic arms (135) of the left telescopic assembly and the right telescopic assembly are connected by a crossbeam assembly (131); Guide plate assemblies (138) are provided on the final telescopic arms (137) of both the left telescopic assembly and the right telescopic assembly.

4. A telescopic device for a container spreader according to claim 3, characterized in that, The first-stage telescopic boom (135) is provided with a universal hinge assembly (132) for connecting with the frame of the lifting trolley (1), so that the left telescopic assembly and the right telescopic assembly can rotate freely around the hinge point.

5. A telescopic device for a container spreader according to claim 1, characterized in that, The guide plate assembly (138) includes: The power system connection interface (1384) allows the power of the lifting device to be output to the guide plate assembly (138). Rotary lock device connection interface, the rotary lock device connection interface is used to install rotary lock device (139); A longitudinal guide plate (1381) is provided to adjust the longitudinal placement error of the container (4). A transverse guide plate (1382) is provided to adjust the transverse placement error of the container (4).

6. A telescopic device for a container spreader according to claim 5, characterized in that, The guide plate assembly (138) is provided with two rotary locking device connection interfaces, and a total of two rotary locking devices (139) are installed; The longitudinal guide plate (1381) is disposed between the two rotary locking devices (139).

7. A telescopic device for a container spreader according to claim 2, characterized in that, Each of the telescopic arms is equipped with: Cable guide ring (1361), the cable guide ring (1361) is used to restrain the power and control cables of the lifting device; A reinforcing flange (1362) is provided at the lower end of each telescopic arm section. While ensuring the direction of movement of the telescopic arm, the flange strengthens the lower opening of the telescopic arm and serves as the second anti-detachment structure for the next telescopic arm section. Guide ring (1363) is set inside each telescopic arm section. Under the premise of ensuring the movement direction of the telescopic arm, it limits the next telescopic arm section and serves as the first anti-detachment structure for the next telescopic arm section. Slide plate (1364), wherein the slide plate (1364) is provided with the inner wall of each telescopic arm to reduce the sliding resistance between the telescopic arms and to adjust the straightness of the telescopic arms during processing; Anti-detachment flange (1365) is provided at the upper end of each telescopic arm section to prevent the telescopic arm from falling off from the previous telescopic arm section and to strengthen the upper orifice of the telescopic arm.

8. A telescopic device for a container spreader according to claim 2, characterized in that, Also includes: The first push rod (133) and the second push rod (134) are set between the telescopic boom and the frame of the lifting trolley (1), and can control the telescopic boom to move in the longitudinal and lateral directions, so as to realize the active positioning of the telescopic boom.

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