CN116654754A - Telescopic device for container lifting appliance - Google Patents

Abstract

The application discloses a telescopic device for a container spreader, which relates to the field of rail transportation and is used for a suspension type container transportation system, and comprises: the left telescopic component, the right telescopic component, the beam component and the guide plate component; the left telescopic assembly and the right telescopic assembly are connected through the beam assembly, so that the left telescopic assembly and the right telescopic assembly synchronously and coordinately move; the tail ends of the left telescopic component and the right telescopic component are respectively provided with a guide plate component, and a rotary lock device is arranged in each guide plate component; according to the application, the linkage of the left and right telescopic devices is realized through the beam assembly, so that the position error of the lifting appliance and the top corner piece of the container is automatically corrected, and the lifting appliance rotating lock device and the top corner piece can be automatically positioned.

Description

Telescopic device for container lifting appliance

Technical Field

The application relates to the field of rail transportation, is used for a suspension type container transportation system, and in particular relates to a telescopic device for a container lifting appliance.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The container loading and unloading operation mainly comprises three lifting operation modes of top lifting, side lifting and jacking; the places with large throughput such as wharfs, yards, railway goods yards and the like gradually adopt a top lifting operation mode to replace other lifting modes including side lifting and lifting, and become the current popular lifting modes.

The container sling generally adopts an integral structure and mainly comprises a steel structure, a rotary lock mechanism, a guide mechanism and a steel wire rope pulley block; the 4 rotating lock mechanisms are fixedly arranged at four corners of the lifting appliance and are responsible for butting with the container; the 4 guide mechanisms are arranged above the rotary lock device to assist the positioning and butt joint of the lifting appliance and the container, and the simple guide mechanisms are also arranged on the side surface of the steel structure; the steel wire rope pulley block is in charge of being connected with a crane; lifting, lowering and forward and backward movement of the lifting appliance can be realized by controlling the crane trolley and the lifting mechanism.

The suspension type container transportation system is limited by the structure of the existing container integral lifting appliance, if the existing lifting mode is adopted, the container integral lifting appliance is required to be integrated on a container transportation vehicle; each transport vehicle is provided with a set of lifting appliance and a lifting mechanism, so that the container transport vehicle needs a main body framework and a lifting appliance structure; the vehicle running mechanism and the lifting appliance lifting mechanism are required to be installed; the equipment integrating the transportation vehicle and the crane has the advantages of complex structure, high quality, high manufacturing cost and transportation cost of the transportation vehicle and poor economy; in addition, this structure is primarily secured with container top corner fittings, which are not typically used in transportation operations, where the container is supported only by four bottom corner fittings or load transfer areas in the bottom structure. Because the main strength of the container comes from the bottom beam, the horizontal movement of the container is limited by bolting the bottom corner fittings; the mode of transportation using the top corner fitting is poorly applicable.

For the above reasons, i have developed a set of handling systems specifically for suspended container transportation systems to meet the container transportation and bolting requirements; the system can be arranged in a loading and unloading area of a container terminal, a storage yard and a railway goods yard, and after transport tools such as AGV, truck or railway flatbed for transporting containers are longitudinally parked under a rail beam of a suspended container transport system, a container loading and unloading device lifts the containers onto the suspended container transport vehicles, and the containers are transported to a destination through the suspended transport vehicles; after the container is reached to the destination, the container loading and unloading device then lifts the container on the suspended transport vehicle onto transport means such as AGV, truck or railway flatbed parked under the container loading and unloading device, and complete the container loading and unloading and transporting process once.

However, as the parking positions of the AGV trolley, the truck and the railway flat car have randomness, the relative positions of the AGV trolley, the truck and the railway flat car have linear position errors and angular position errors; the common guide mechanism is simpler, and cannot adapt to complex action environments, so that the rotary locking device and the container top corner fitting cannot be accurately positioned.

Disclosure of Invention

The application aims at: the telescopic device for the container lifting appliance aims at solving the problems in the prior art, realizes the linkage of left and right telescopic components through a beam component, automatically corrects the position error of the lifting appliance and a container top corner piece, ensures that a rotating lock device of the lifting appliance can be automatically positioned with the top corner piece, and solves the problems.

The technical scheme of the application is as follows:

a telescopic device for a container spreader, comprising:

the left telescopic assembly and the right telescopic assembly are connected through the beam assembly, so that the left telescopic assembly and the right telescopic assembly synchronously and coordinately move;

the tail ends of the left telescopic component and the right telescopic component are respectively provided with a guide plate component, and a rotary lock device is arranged in the guide plate components;

the accurate positioning of the rotary lock device and the container top corner fitting can be ensured through the guide plate assembly and the beam assembly.

Further, the left telescopic assembly and the right telescopic assembly are each composed of at least three telescopic arms.

Further, the left telescopic assembly and the right telescopic assembly are composed of a first-stage telescopic arm, a last-stage telescopic arm and a plurality of middle-stage telescopic arms;

the first-stage telescopic arms of the left telescopic assembly and the right telescopic assembly are connected through a beam assembly;

and guide plate assemblies are arranged on the final telescopic arms of the left telescopic assembly and the right telescopic assembly.

Further, the first-stage telescopic arm is provided with a universal hinge assembly connected with the frame of the lifting trolley, so that the left telescopic assembly and the right telescopic assembly can freely rotate around a hinge point.

Further, the beam assembly includes:

the first cross beam and the second cross beam are respectively hinged with the primary telescopic arms of the left telescopic assembly and the right telescopic assembly;

the first cross beam and the second cross beam are hinged through the first shaft hinge;

the first shaft hinge can be connected with the first beam and the second beam, and the first beam and the second beam can be guaranteed to rotate along the axis of the first shaft hinge; when the container and the track beam are not placed in parallel, a certain angle exists between the container and the track beam, and the longitudinal distance between the top corner pieces at two sides of the container and the corresponding guide plate assembly is inconsistent; the telescopic arm on one side can move outwards according to the guidance of the guide plate assembly without driving the guide plate assembly on the other side to move outwards at the same time due to the existence of the first shaft hinge, so that the guide plate assemblies on both sides can be positioned with the top corner piece.

Further, the upper end of the primary telescopic arm is provided with a shaft hinge seat;

the first cross beam and the second cross beam are hinged with the hinge seat through a second shaft hinge;

the second shaft hinge can restrict the left telescopic assembly and the right telescopic assembly to move synchronously along the transverse direction, when the guide plate assembly on the telescopic arm on one side is contacted with the container top corner piece, guiding is started, and when the position deviation is corrected, the guide plate assembly on the telescopic arm on the other side can be driven to move together through the beam assembly, so that the two guide plate assemblies can simultaneously guide the rotary locking device to be positioned with the container top corner piece.

Further, the guide plate assembly includes:

the power system connecting interface can be used for outputting the power of the lifting appliance to the guide plate assembly;

the rotary lock device connection interface is used for installing the rotary lock device;

the longitudinal guide plate can adjust the placement error of the container in the longitudinal direction;

and the transverse guide plate can adjust the placement error of the container in the transverse direction.

Further, the guide plate assembly is provided with two rotating lock device connecting interfaces, and two rotating lock devices are mounted in total;

the longitudinal guide plate is arranged between the two rotary lock devices.

Further, all be provided with on the flexible arm:

the cable guide ring is used for restraining power and control cables of the lifting appliance;

the reinforcing flange is arranged at the lower end of each section of telescopic arm, and on the premise of ensuring the movement direction of the telescopic arm, the strength of the orifice at the lower part of the telescopic arm is enhanced, and meanwhile, the reinforcing flange is used as a second anti-falling structure of the next section of telescopic arm;

the guide ring is arranged in each section of telescopic arm, limits the next section of telescopic arm on the premise of ensuring the movement direction of the telescopic arm, and simultaneously serves as a first anti-falling structure of the next section of telescopic arm;

the sliding plate is provided with inner walls of all sections of telescopic arms and is used for reducing sliding resistance among the telescopic arms and adjusting the straightness of the telescopic arms during processing;

the anti-falling flange is arranged at the upper end of each section of telescopic arm and used for preventing the telescopic arm from falling off from the previous section of telescopic arm and enhancing the strength of the orifice at the upper part of the telescopic arm.

Further, the method further comprises the following steps:

the first push rod and the second push rod are arranged between the telescopic arm and the lifting trolley frame, and the telescopic arm can be controlled to move along the longitudinal direction and the transverse direction, so that the active positioning of the telescopic arm is realized.

Compared with the prior art, the application has the beneficial effects that:

the telescopic device for the container lifting appliance realizes the linkage of the left telescopic device and the right telescopic device through the beam assembly, automatically corrects the position error of the lifting appliance and the top corner piece of the container, and ensures that the lifting appliance rotating lock device can be automatically positioned with the top corner piece.

Drawings

FIG. 1 is a schematic structural view of a telescopic device for a container spreader;

FIG. 2 is a schematic view of a telescopic device for a container spreader;

FIG. 3 is a schematic view of the structure of the beam assembly;

FIG. 4 is a schematic illustration of a container not being placed parallel to a rail beam;

FIG. 5 is a schematic structural view of a guide plate assembly;

FIG. 6 is a schematic view of the structure when the fence assembly is used to locate 2 top corner pieces intermediate two containers;

FIG. 7 is a schematic view of the structure of the baffle assembly after positioning 2 corner pieces intermediate the two containers;

fig. 8 is a schematic structural view of the telescopic arm.

Reference numerals: 1-lifting trolley, 2-track beam, 3-telescoping device, 4-container, 5-transport, 131-beam assembly, 132-universal hinge assembly, 133-first push rod, 134-second push rod, 135-first-stage telescoping arm, 136-intermediate-stage telescoping arm, 137-last-stage telescoping arm, 138-guide assembly, 139-twist lock device, 1311-first beam, 1312-second-shaft hinge, 1313-first-shaft hinge, 1381-longitudinal guide, 1382-transverse guide, 1383-stiffener, 1384-power-system connection interface, 1385-intermediate guide, 1361-cable guide ring, 1362-stiffening flange, 1363-guide ring, 1364-slide, 1365-anti-slip flange.

Detailed Description

It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and capabilities of the present application are described in further detail below in connection with examples.

Example 1

The container 4 loading and unloading system is arranged in a loading and unloading area of a container 4 wharf, a storage yard and a railway freight yard, as shown in fig. 2, after a transport tool 5 such as an AGV, a truck or a railway flat car for transporting the container 4 is parked under a suspended container 4 transport system rail beam 2 longitudinally, the container 4 loading and unloading device lifts the container 4 onto the suspended container 4 transport vehicle, and the container 4 is transported to a destination through the suspended transport vehicle; after the container 4 arrives at the destination, the container 4 loading and unloading device then lifts the container 4 on the suspended transport vehicle onto the transport means 5 such as an AGV trolley, a truck or a railway flat car which is parked right below the container 4, and the complete container 4 loading and unloading and transporting process is completed once.

Due to the randomness of the parking positions of the transport means 5 and the linear position error and the angular position error of the relative positions of the lifting appliance, the telescopic device 3 provided by the application has the function of ensuring that the rotary lock device 139 can be successfully positioned with the top corner fitting of the container 4 within a certain error range.

The loading and unloading system of the suspended container 4 transportation system generally consists of 3 lifting trolleys 1, each lifting trolley 1 is provided with a set of telescopic devices 3, and each set of telescopic devices 3 is responsible for positioning two top corner pieces at one end of the container 4; the intermediate telescopic device 3 needs to be positioned with 4 top corner members in the middle of two containers 4 placed side by side when hoisting 2 containers 4 at the same time.

In this embodiment, referring specifically to fig. 1, a telescopic device for a container spreader is configured to be mounted on a lifting trolley 1 of a loading and unloading system, and control a rotation lock device 139 to descend and lift according to a designed path, correct a relative position error between the rotation lock device 139 and a top corner fitting of a container 4, and implement positioning of the top corner fitting of the container 4, and specifically includes the following structure:

the left telescopic assembly and the right telescopic assembly are connected through the beam assembly 131, so that the left telescopic assembly and the right telescopic assembly synchronously and coordinately move;

the tail ends of the left telescopic component and the right telescopic component are respectively provided with a guide plate component 138, and a rotary lock device 139 is arranged in the guide plate component 138;

the precise positioning of the twist lock 139 and the top corner fitting of the container 4 is ensured by the guide plate assembly 138 and the cross beam assembly 131.

In this embodiment, specifically, the left telescopic assembly and the right telescopic assembly are each composed of at least three telescopic arms.

In this embodiment, specifically, the left telescopic assembly and the right telescopic assembly are each composed of a section of first-stage telescopic arm 135, a section of last-stage telescopic arm 137 and a plurality of intermediate-stage telescopic arms 136; it should be noted that, the intermediate telescopic arm 136 mainly extends the telescopic length, and according to the lifting distance requirement and the positioning precision requirement of the lifting appliance, a proper number of intermediate telescopic arms 136 can be arranged, so as to meet the lifting height and the positioning precision requirement of the lifting appliance; preferably, as shown in FIG. 1, the left and right telescoping assemblies are each comprised of a length of one-stage telescoping arm 135, a length of final stage telescoping arm 137, and three lengths of intermediate stage telescoping arm 136;

the first-stage telescopic arms 135 of the left telescopic assembly and the right telescopic assembly are connected through a beam assembly 131;

the final telescoping arms 137 of the left and right telescoping assemblies are each provided with a guide plate assembly 138.

In this embodiment, specifically, the primary telescopic arm 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 freely rotate around a hinge point; preferably, the universal hinge assembly 132 is a ball hinge structure.

In this embodiment, specifically, as shown in fig. 3, the beam assembly 131 includes:

a first beam 1311 and a second beam, the first beam 1311 and the second beam being hinged to the primary telescoping arms 135 of the left telescoping assembly and the right telescoping assembly, respectively;

a first axis hinge 1313, the first and second beams 1311 and 1313 being hinged by the first axis hinge 1313;

the first shaft hinge 1313 can connect the first beam 1311 and the second beam, and ensure that the first beam 1311 and the second beam can rotate along the axis of the first shaft hinge 1313; when the container 4 and the track beam 2 on the transport means 5 are not placed in parallel, a certain angle exists between the container 4 and the track beam 2, so that the longitudinal distances between the top corner pieces on two sides of the container 4 and the corresponding guide plate assemblies 138 are inconsistent, and the positioning of the guide plate assemblies 138 on two sides is abnormal; without the first shaft hinge 1313, positioning in one of the corner pieces would result in the other corner piece not being positioned; as shown in fig. 4, the lifting trolley 1 is positioned according to a top corner piece near the center of the container 4 along the longitudinal position, when the guide plate component 138 contacts with the top corner piece far away from the center, the telescopic arm is pushed to move outwards, the telescopic arm drives the beam component 131 to move, the beam component 131 drives the telescopic arm on the other side to move outwards together, the distance between the guide plate component 138 on the other side and the top corner piece of the container 4 is increased, and the positioning fails; the first shaft hinge 1313 can enable the telescopic arm on one side to move outwards according to the guidance of the guide plate assembly 138, and does not drive the guide plate assembly 138 on the other side to move outwards at the same time, so that the guide plate assemblies 138 on both sides can be positioned with the top corner piece.

In this embodiment, specifically, an axle hinge seat is disposed at the upper end of the primary telescopic arm 135;

the first beam 1311 and the second beam are hinged with a shaft hinge seat through a second shaft hinge 1312;

the second shaft hinge 1312 can restrict the left telescopic assembly and the right telescopic assembly to move synchronously in the transverse direction, when the guide plate assembly 138 on one telescopic arm contacts with the top corner piece of the container 4 to start guiding, and when the position deviation is corrected, the guide plate assembly 138 on the other telescopic arm can be driven to move together by the beam assembly 131, so that the two guide plate assemblies 138 can guide the rotary locking device 139 to be positioned with the top corner piece of the container 4 simultaneously.

In this embodiment, specifically, as shown in fig. 5, the guide plate assembly 138 includes:

a power system connection interface 1384, through which the power of the lifting appliance can be output to the guide plate assembly 138, and applied to the container 4 through the twist lock 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, a screw system connection interface; in this embodiment, the power system connection interface 1384 is a wire rope system connection interface;

a twist lock device connection interface for mounting a twist lock device 139;

a longitudinal guide 1381, the longitudinal guide 1381 being adapted to adjust for placement errors of the container 4 in the longitudinal direction;

a transverse guide 1382, said transverse guide 1382 being adapted to adjust for placement errors of the container 4 in the transverse direction; preferably, a reinforcing rib 1383 is provided on the back of the transverse guide 1382.

In this embodiment, specifically, as shown in fig. 6, when the guide plate assembly 138 is used for positioning with 2 top corner pieces between two containers 4, the guide plate assembly 138 is provided with two connection interfaces of the rotating lock devices, and two rotating lock devices 139 are mounted in total;

the longitudinal guide 1381 is arranged between the two twist-lock devices 139 as an intermediate guide 1385 which is deflected to the right or left depending on the position of the container 4 when lifting a container 4, as shown in fig. 6; when lifting two containers 4, the intermediate guide plates are adjusted to the vertical state, as shown in fig. 7.

In this embodiment, as shown in fig. 8, it should be noted that, the telescopic arms of each section are basically consistent in structure, and only have a difference in size, the telescopic arms are extended downward by their own weights, and power for lifting upward is provided by the wire rope drive or screw drive of the lifting trolley 1; specifically, all be provided with on the flexible arm:

a cable guide ring 1361, wherein the cable guide ring 1361 is used for restraining power and control cables of a lifting appliance;

the reinforcing flange 1362 is arranged at the lower end of each section of telescopic boom, the strength of the orifice at the lower part of the telescopic boom is enhanced on the premise of ensuring the movement direction of the telescopic boom, and the reinforcing flange 1362 is used as a second anti-drop structure of the next section of telescopic boom;

the guide rings 1363 are arranged in each section of telescopic arm, and limit the next section of telescopic arm on the premise of ensuring the movement direction of the telescopic arm, and meanwhile, the guide rings 1363 are used as a first anti-falling structure of the next section of telescopic arm;

a sliding plate 1364, wherein the sliding plate 1364 is provided with inner walls of each telescopic arm, which is used for reducing sliding resistance between the telescopic arms and adjusting straightness of the telescopic arms during processing;

the anti-falling flange 1365 is arranged at the upper end of each section of telescopic boom, and is used for preventing the telescopic boom from falling off from the previous section of telescopic boom and enhancing the strength of the orifice at the upper part of the telescopic boom.

In this embodiment, specifically, the method further includes:

the first push rod 133 and the second push rod 134 are arranged between the telescopic arm and the frame of the lifting trolley 1 (it should be noted that only one second push rod 134 is shown in fig. 1, and the other second push rod 134 is not shown), so that the telescopic arm can be controlled to move along the longitudinal direction and the transverse direction, and active positioning of the telescopic arm can be realized; 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; the telescopic arm can be controlled to return to the initial state through the first push rod 133 and the second push rod 134, so that the influence of external factors on the positioning of the telescopic arm is avoided; the adoption of the actively positioned telescopic device can improve the hoisting efficiency and the error correction range, and can omit the longitudinal guide plate 1382 and the transverse guide plate 1382 of the guide plate assembly 138 under certain conditions; it should be noted that, the first push rod 133 and the second push rod 134 may be replaced by shock absorbers, so as to absorb the longitudinal and transverse impact received by the telescopic arm, and the telescopic device becomes a self-positioning device, and may also control the telescopic arm to return to the initial state, so as to avoid the influence of external factors on positioning the telescopic arm.

When in use, the container 4 reaches the lower part of the container 4 loading and unloading device through the transport means 5, the loading and unloading system reads the position of the container 4 and controls the suspension type container 4 transport vehicle and the lifting trolley 1 to adapt to the position of the container 4; the lifting trolley 1 controls the telescopic device 3 to descend through the transmission mechanism, the telescopic device 3 descends to be close to the top corner piece of the container 4 by means of self weight, the positions of the guide plate assemblies 138 on two sides and the top corner piece of the container 4 are automatically adjusted through the telescopic arm, the cross beam and other devices, and the rotary lock devices 139 on two sides are guaranteed to be in butt joint with the top corner piece of the container 4.

When the active positioning telescopic device 3 is adopted, the lifting trolley 1 and the transporting trolley are firstly positioned at the position of the container 4, the lifting trolley 1 and the hanging transporting trolley are controlled to move to the proper positions, the lifting trolley 1 controls the telescopic boom to descend, in the descending process, the telescopic boom is uninterruptedly adjusted through the push rod on the telescopic boom to adjust the relative position of the rotary lock device 139 and the top corner piece of the container 4, the telescopic boom can be rapidly positioned, and the lifting efficiency is improved. After the rotating lock device 139 locks the container 4, the push rod device is unloaded, so that the container 4 is ensured to be in a vertical state, and the container 4 is conveniently in butt joint with the container 4 transportation trolley.

The above examples merely illustrate specific embodiments of the application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it is possible for a person skilled in the art to make several variants and modifications without departing from the technical idea of the application, which fall within the scope of protection of the application.

This background section is provided to generally present the context of the present application and the work of the presently named inventors, to the extent it is described in this background section, as well as the description of the present section as not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present application.

Claims (10)

1. A telescopic device for a container spreader, comprising:

the left telescopic assembly and the right telescopic assembly are connected through a beam assembly (131), so that the left telescopic assembly and the right telescopic assembly synchronously and coordinately move;

the guide plate assembly (138), the guide plate assembly (138) is installed at the tail ends of the left telescopic assembly and the right telescopic assembly, and a rotary lock device (139) is arranged in the guide plate assembly (138);

the precise positioning of the rotary lock device (139) and the top corner piece of the container (4) can be ensured by the guide plate assembly (138) and the beam assembly (131).

2. The telescopic device for a container spreader according to claim 1, wherein the left telescopic assembly and the right telescopic assembly are each composed of at least three telescopic arms.

3. The telescopic device for a container spreader according to claim 2, wherein the left telescopic assembly and the right telescopic assembly are each composed of a section of one-stage telescopic arm (135), a section of last-stage telescopic arm (137) and a plurality of intermediate-stage telescopic arms (136);

the first-stage telescopic arms (135) of the left telescopic assembly and the right telescopic assembly are connected through a beam assembly (131);

and guide plate assemblies (138) are arranged on the final telescopic arms (137) of the left telescopic assembly and the right telescopic assembly.

4. A telescopic device for a container spreader according to claim 3, wherein the primary telescopic arm (135) is provided with a universal hinge assembly (132) for connection to the frame of the lifting trolley (1) such that the left and right telescopic assemblies are free to rotate about the hinge point.

5. A telescopic device for a container spreader according to claim 3, wherein the beam assembly (131) comprises:

a first cross beam (1311) and a second cross beam, the first cross beam (1311) and the second cross beam being hinged to a primary telescoping arm (135) of the left telescoping assembly and the right telescoping assembly, respectively;

a first axis hinge (1313), the first and second beams (1311, 1313) being hinged by the first axis hinge (1313);

the first shaft hinge (1313) can connect the first beam (1311) and the second beam, and ensure that the first beam (1311) and the second beam can rotate along the axis of the first shaft hinge (1313); when the container (4) and the track beam (2) are not placed in parallel, a certain angle exists between the container (4) and the track beam (2), and the longitudinal distance between the top corner pieces at two sides of the container (4) and the corresponding guide plate assembly (138) is inconsistent; the first shaft hinge (1313) can enable the telescopic arm on one side to move outwards according to the guidance of the guide plate assembly (138), and does not drive the guide plate assembly (138) on the other side to move outwards at the same time, so that the guide plate assemblies (138) on the two sides can be positioned with the top corner piece.

6. The telescopic device for a container spreader according to claim 5, wherein the upper end of the primary telescopic arm (135) is provided with a shaft hinge base;

the first cross beam (1311) and the second cross beam are hinged with a shaft hinge seat through a second shaft hinge (1312);

the second shaft hinge (1312) can restrict the left telescopic assembly and the right telescopic assembly to move synchronously along the transverse direction, when the guide plate assembly (138) on the telescopic arm on one side is contacted with the top corner piece of the container (4) to start guiding, when the position deviation is corrected, the guide plate assembly (138) on the telescopic arm on the other side can be driven to move together by the beam assembly (131), so that the two guide plate assemblies (138) can simultaneously guide the rotary locking device (139) to be positioned with the top corner piece of the container (4).

7. The telescopic device for a container spreader according to claim 1, wherein the guide plate assembly (138) comprises:

a power system connection interface (1384), through which power system connection interface (1384) the power of the spreader can be output to the guide plate assembly (138);

a twist-lock device connection interface for mounting a twist-lock device (139);

a longitudinal guide plate (1381), wherein the longitudinal guide plate (1381) can adjust the placement error of the container (4) in the longitudinal direction;

a transverse guide (1382), said transverse guide (1382) being adapted to accommodate errors in the placement of the container (4) in the transverse direction.

8. The telescopic device for a container spreader according to claim 7, wherein the guide plate assembly (138) is provided with two twist-lock device connection interfaces, and two twist-lock devices (139) are mounted in total;

the longitudinal guide (1381) is arranged between two twist-lock devices (139).

9. The telescopic device for a container spreader according to claim 2, wherein the telescopic arms are provided with:

a cable guide ring (1361), wherein the cable guide ring (1361) is used for restraining power and control cables of the lifting appliance;

the reinforcing flange (1362) is arranged at the lower end of each section of telescopic arm, the strength of the orifice at the lower part of the telescopic arm is reinforced on the premise of ensuring the movement direction of the telescopic arm, and the reinforcing flange (1362) is used as a second anti-falling structure of the next section of telescopic arm;

the guide ring (1363) is arranged in each section of telescopic arm, the next section of telescopic arm is limited on the premise of ensuring the movement direction of the telescopic arm, and the guide ring (1363) is used as a first anti-falling structure of the next section of telescopic arm;

the sliding plate (1364) is provided with inner walls of all sections of telescopic arms, and is used for reducing sliding resistance among the telescopic arms and adjusting straightness of the telescopic arms during processing;

the anti-falling flange (1365) is arranged at the upper end of each section of telescopic arm and used for preventing the telescopic arm from falling off from the previous section of telescopic arm and enhancing the strength of an orifice at the upper part of the telescopic arm.

10. The telescopic device for a container spreader according to claim 2, further comprising:

the first push rod (133) and the second push rod (134), the first push rod (133) and the second push rod (134) are arranged between the telescopic boom and the frame of the lifting trolley (1), and the telescopic boom can be controlled to move along the longitudinal direction and the transverse direction, so that the active positioning of the telescopic boom is realized.