Stacked material loading and unloading device with pallet and loading and unloading method thereof

Abstract

The present application relates to a kind of pallets of material pile whole vehicle loading and unloading device and its loading and unloading method, including fixed frame, fixed frame is installed with the lifting platform capable of placing pallet by lifting system, lifting platform is installed with chain conveying mechanism I in, chain conveying mechanism I can drive pallet movement, lifting platform is also installed with fork arm conveyor, fork arm conveyor can slide out from lifting platform, chain conveying mechanism II is installed at the top of fork arm conveyor, chain conveying mechanism II can be lifted and contacted with pallet by conveying chain lifting device, and drive pallet movement along chain conveying mechanism II, or by conveying chain lifting device and be lowered and contacted with pallet and be separated from contact.Material can be placed to the lifting platform of the present loading and unloading device by forklift, travelling crane outside the vehicle, the material placed by present material loading and unloading machine is sent into the compartment of compartment vehicle.The speed of loading and unloading vehicle can be greatly improved, and logistics efficiency is improved.No need to modify each vehicle, good applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cargo transportation and loading and unloading technology, in particular to a palletized stacked material whole vehicle loading and unloading device and a loading and unloading method thereof. BACKGROUND

[0002] At present, the internal large-scale warehouse of the logistics industry is very perfect and has high automation, but the last one meter of the truck connected to the warehouse has always been a problem in the logistics industry. At present, there are schemes for modifying the truck, such as the Chinese utility model "Automatic loading and unloading system for paper boxes, paper film bags and woven bags", patent publication number CN207684528U, which discloses a form of installing a conveyor on a transport vehicle, but it has problems such as inconvenient maintenance, difficulty in annual inspection of modified vehicles, and high overall modification cost, which has been difficult to promote. Although some automatic loading and unloading equipment outside the vehicle has appeared, most of them are for single-box, single-pallet continuous batch loading and unloading and require certain manual assistance, and cannot complete the loading and unloading quickly and integrally. For example, the Chinese utility model patent "Batch loading and unloading pallet type loader" includes a mounting plate, a pallet is fixedly installed at the lower end of the side of the mounting plate, an installation slot is formed in one side of the pallet, shafts are fixedly installed at both ends of the installation slot through bearings, one end of the shaft is located inside a cavity formed in one side of the pallet, a brake motor is fixedly installed on the side of the cavity, the shaft end of the brake motor is fixedly installed on the end of the shaft, a guide plate is fixedly installed on the side of the shaft, guide grooves are formed in the upper end faces of the guide plate and the pallet, guide rollers are uniformly fixedly installed in the inner sides of the guide grooves, a baffle is fixedly installed on one side of the upper end face of the pallet, cross bars are uniformly fixedly installed on both ends of the side of the baffle, vertical bars are uniformly fixedly installed on the side of the cross bars, by controlling the brake motor to work, one end of the guide plate is brought into contact with the ground, then the worker pushes the material onto the guide plate and into contact with the guide rollers on the guide plate, and the material can be directly pushed into the pallet, after the loading and unloading is completed, the brake motor is controlled to reverse, so that the guide plate is rotated to a position perpendicular to the upper end face of the pallet. As can be seen, although the purpose of continuous operation is achieved and the loading and unloading efficiency is improved to a certain extent, manual assistance is still required, and only single-piece continuous loading and unloading can be achieved. How to further improve the loading and unloading efficiency and achieve whole vehicle loading and unloading of stacked materials is a direction that has been explored in the field. SUMMARY

[0003] The present application provides a palletized stacked material whole vehicle loading and unloading device which can achieve whole vehicle loading and unloading of stacked materials.

[0004] The specific technical scheme of the present application is: a palletized material stack whole vehicle loading and unloading device, comprising a fixed frame, a lifting platform capable of placing a pallet is installed on the fixed frame through a lifting system, a chain conveying mechanism I is installed in the lifting platform, the chain conveying mechanism I can drive the pallet to move, a fork arm conveyor is also installed in the lifting platform, the fork arm conveyor can slide out of the lifting platform, a chain conveying mechanism II is installed at the top end of the fork arm conveyor, the chain conveying mechanism II can be lifted into contact with the pallet through a conveying chain lifting device and drive the pallet to move along the chain conveying mechanism II, or the chain conveying mechanism II can be lowered out of contact with the pallet through the conveying chain lifting device.

[0005] Further, preferably, a lead screw is installed on each vertical beam at the four corners of the fixed frame, a lead screw sliding block is installed on the lead screw, the lead screw sliding block is connected with the platform frame, and the platform frame moves up and down by rotating the lead screw.

[0006] Further, preferably, the lifting system comprises a lifting motor, the lifting motor drives a horizontal driven shaft provided on the cross beam to rotate through a main transmission shaft, and the horizontal driven shaft is connected with the lead screw.

[0007] Further, preferably, the chain conveying mechanism I is arranged in two groups along the length direction of the lifting platform.

[0008] Further, preferably, one fork arm conveyor is arranged between each group of chain conveying mechanisms I.

[0009] Further, preferably, a guide rail is installed in the lifting platform along the length direction, a guide rail trolley is installed on the fork arm conveyor corresponding to the guide rail, and the guide rail trolley can drive the fork arm conveyor to slide out of the lifting platform by moving along the guide rail.

[0010] Further, preferably, the fork arm conveyor comprises a fork arm frame, a groove frame is provided at the top of the fork arm frame, and the front and rear ends of the chain support frame are respectively hinged to the groove frame through short hinge arms.

[0011] Further, preferably, it further comprises a long hinge arm, the long hinge arm is in the shape of "L", the short end of the long hinge arm is hinged to the groove frame, the long end of the long hinge arm is hinged to the connecting rod, the hinge point on the long hinge arm is hinged to the chain support frame, and the cylinder drives the long hinge arm to rotate.

[0012] Further, preferably, it further comprises a laser ranging sensor, a laser ranging sensor for detecting the height of the vehicle compartment is arranged on the front side of the fixed frame.

[0013] Another technical purpose of the present application is to disclose a method for using the palletized material stack whole vehicle loading and unloading device as described above, comprising the following steps:

[0014] Loading steps:

[0015] 1) The pallet stacked material is in place, the pallet material is placed on the lifting platform by the forklift or the crane, and the truck is in place during the placement process.

[0016] 2) The laser ranging sensor detects the height of the truck compartment, and the lifting system lifts the lifting platform to the height of the truck compartment.

[0017] 3) The fork arm conveyor enters the compartment.

[0018] 4) The chain conveying mechanism II of the fork arm conveyor rises to contact the pallet, and the material is transported to the compartment.

[0019] 5) After the material is sent to the compartment, the chain conveying mechanism II of the fork arm conveyor is lowered and the pallet is separated; the fork arm conveyor is retracted, the truck is driven away, and the lifting platform is lowered back to the initial position.

[0020] Unloading steps:

[0021] 6) The truck is in place, the laser ranging sensor detects the height of the truck compartment, and the lifting system lifts the lifting platform to the height of the truck compartment.

[0022] 7) The fork arm conveyor enters the compartment.

[0023] 8) The chain conveying mechanism II of the fork arm conveyor rises to contact the pallet, and the material is transported to the outside of the compartment.

[0024] 9) After the material is sent to the outside of the compartment, the chain conveying mechanism II of the fork arm conveyor is lowered and the pallet is separated.

[0025] 10) The fork arm conveyor is retracted, and the truck is driven away.

[0026] 11) The lifting platform is lowered back to the initial position, and the pallet material is transported away by the forklift or the crane, and the truck is in place during the placement process.

[0027] The beneficial effects of the present application are: during loading, the material can be placed on the lifting platform of the present loading and unloading device by the forklift or the crane outside the truck, and the material placed by the present material loading and unloading machine is sent into the compartment of the truck.

[0028] During unloading, the material can be taken out by the present material loading and unloading machine and sent to the upper conveying chain for easy transfer by the crane or the forklift. The loading and unloading speed can be greatly improved, and the logistics efficiency can be improved.

[0029] No modification is needed for each vehicle, and the applicability is good. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a front view of a pallet stacked material whole truck loading and unloading device of the present application Figure 1Wherein the lifting platform is in the raised state, the fork arm conveyor slides out from the lifting platform, the chain conveying mechanism II is lifted by the chain lifting device of the fork arm conveyor, and all chains are removed for the convenience of showing the structure;

[0031] Figure 2 It is a left view of the whole vehicle loading and unloading device for the stacked material with pallets according to the application;

[0032] Figure 3 It is a top view of the whole vehicle loading and unloading device for the stacked material with pallets according to the application; Figure 1 All chains are removed for the convenience of showing the structure;

[0033] Figure 4 It is a front view of the whole vehicle loading and unloading device for the stacked material with pallets according to the application; Figure 2 Wherein the lifting platform is in the lowered and retracted state, the fork arm conveyor slides back into the lifting platform, and the chain conveying mechanism II is put back into the groove frame by the chain lifting device of the fork arm conveyor;

[0034] Figure 5 It is a front end partial three-dimensional structural view of the whole vehicle loading and unloading device for the stacked material with pallets according to the application, wherein the lifting platform is in the raised state, the fork arm conveyor slides out from the lifting platform, the chain conveying mechanism II is lifted by the chain lifting device of the fork arm conveyor, and the effect diagram after all chains are installed;

[0035] Figure 6 It is a rear end partial three-dimensional structural view of the whole vehicle loading and unloading device for the stacked material with pallets according to the application, wherein the lifting platform is in the raised state, the fork arm conveyor slides out from the lifting platform, the chain conveying mechanism II is lifted by the chain lifting device of the fork arm conveyor, and the effect diagram after all chains are installed;

[0036] Figure 7 It is a three-dimensional schematic view of the fixed rack and the lifting system component according to the application;

[0037] Figure 8 It is a front view of the fork arm conveyor according to the application, wherein the chain conveying mechanism II is put back into the groove frame by the chain lifting device, and is in the retracted state;

[0038] Figure 9 It is a three-dimensional schematic view of the fork arm conveyor according to the application; Figure 1 The chain conveying mechanism II is put back into the groove frame by the chain lifting device, and is in the retracted state;

[0039] Figure 10 It is a three-dimensional schematic view of the fork arm conveyor according to the application; Figure 2 The chain conveying mechanism II is lifted by the chain lifting device, and is in the raised state;

[0040] Figure 11 The state diagram of loading the vehicle for the present application;

[0041] Figure 12 The perspective reference diagram of the tray used in the present application;

[0042] Figure 13 The effect reference diagram of loading the vehicle for the present application.

[0043] In the figure: 1-fixed frame, 101-base frame, 102-vertical beam, 103-cross beam;

[0044] 2-lifting system, 201-lifting motor, 202-main transmission shaft, 203-steering box I, 204-transverse driven shaft, 205-screw rod, 206-screw rod sliding block, 207-steering box II;

[0045] 3-lifting platform, 301-platform frame, 302-chain conveying mechanism I, 303-transmission mechanism, 304-lifting platform motor;

[0046] 4-fork conveying machine, 401-fork frame, 402-guide rail trolley, 403-guide rail, 404-groove frame, 405-chain conveying mechanism II, 406-chain support frame;

[0047] 4021-trolley motor, 4022-upper shaft, 4023-upper roller, 4024-trolley transmission system, 4025-lower shaft, 4026-lower roller;

[0048] 5-conveying chain lifting device, 501-short articulated arm, 502-long articulated arm, 503-connecting rod, 504-articulated point, 505-cylinder, 506-push rod. DETAILED DESCRIPTION

[0049] In order to make the technical problems and technical solutions solved by the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0050] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment 1

[0052] As shown in Figures 1 to 4 , Figure 7 , a pallet-equipped stacked material whole vehicle loading and unloading device includes a fixed frame 1, which is a steel structure including a base frame 101 placed in a mounting pit, vertical beams 102 vertically installed at four corners of the base frame 101, and a hollow frame structure, and a cross beam 103 connected and arranged between the vertical beams 102 at the front and rear ends of each side.

[0053] The fixed frame 1 is provided with a lifting platform 3 capable of placing a pallet through a lifting system 2. The lifting system 2 includes a lifting motor 201 installed at the tail of the base frame 101, a shaft head of the lifting motor 201 connected with two main transmission shafts 202 through a steering box I 203 on each side, and the main transmission shaft 202 on each side connected with one end of a steering box II 207 provided at the top of a lead screw 205 of the tail cross beam 103 through two steering boxes I 203 and a change of direction, and the other end connected with a transverse driven shaft 204, and the other end of the transverse driven shaft 204 connected with and driving the steering box II 207 at the top of the lead screw 205 of the head cross beam 103, and driving the lead screw 205 to rotate.

[0054] The steering box I 203 and the steering box II 207 are prior art, and a T-shaped steering box (also known as a T-spiral bevel gear steering box) is adopted. The main transmission shaft 202 drives the transverse driven shaft 204 and the lead screw 205 to rotate through the steering box II 207, that is, one steering box II 207 is provided at the top of each lead screw 205, one end of the steering box II 207 at the top of the tail lead screw 205 is connected with the main transmission shaft 202, power transmission is realized by a rotating rod, and of course, chain wheel and chain transmission, or pulley and belt transmission, and the like can also be used to realize stable power transmission. The present application preferably shows the use of a transmission rod, which is stable and can realize fast transmission of large torque.

[0055] As shown in Figures 1 to 6As shown, a chain conveyor mechanism I 302 is installed inside the lifting platform 3. The chain conveyor mechanism I 302 can drive the pallet to move. There are two sets of chain conveyor mechanisms I 302 arranged along the length of the platform frame 301. The chain conveyor mechanism I 302 includes a conveyor chain, a conveyor sprocket, a rotating shaft, a conveyor chain support frame, a tensioning device, etc. It is a typical chain conveyor design and is existing technology.

[0056] The platform frame 301 is equipped with a lifting platform motor 304 at the rear. The lifting platform motor 304 drives the shaft of the conveyor sprocket to rotate through the transmission mechanism 303, thereby driving the conveyor chain to move and realizing chain conveying. In this embodiment, the transmission mechanism 303 adopts chain drive, but belt drive or gear drive can also be used, which are equivalent technology replacements.

[0057] like Figures 1 to 6 , Figures 8 to 10 As shown, a forklift conveyor 4 is also installed inside the lifting platform 3. The forklift conveyor 4 can slide out from inside the lifting platform 3. One forklift conveyor 4 is provided between each set of chain conveyor mechanisms I302.

[0058] The top of the forklift conveyor 4 is equipped with a chain conveyor mechanism II 405. The chain conveyor mechanism II 405 can be raised to contact the pallet through the conveyor chain lifting device 5 and drive the pallet to move along the chain conveyor mechanism II 405, or it can be lowered through the conveyor chain lifting device 5 to detach from the pallet.

[0059] like Figures 6-7 , Figure 9 , Figure 10 As shown, each forklift conveyor 4 includes a forklift frame 401. Two grooved frames 404 are symmetrically arranged on the top of the forklift frame 401 along the length direction. The chain conveyor mechanism II 405 also includes a conveyor chain, a conveyor sprocket, a rotating shaft, a conveyor chain support frame, a tensioning device, etc. In particular, the chain support frame 406 is placed inside the grooved frame 404. The front and rear ends of the chain support frame 406 are respectively hinged to the grooved frame 404 through short hinged support arms 501, that is, the chain support frame 406 can rotate and rise or fall from the grooved frame 404.

[0060] The number of short articulated arms 501 at the front and rear ends of the chain support frame 406 can be adjusted by those skilled in the art as needed. In this embodiment, a design of one set of short articulated arms 501 at the rear end and several sets of short articulated arms 501 at the front end is adopted, and several sets of long articulated arms 502 are arranged between the short articulated arms 501 at the front and rear ends.

[0061] The chain support frame 406 includes a hollow support square tube, and a chain support bar is provided on the top of the hollow support square tube. The conveying chain of the chain conveying mechanism II 405 passes through the hollow support square tube in a ring shape, with the upper chain located on the chain support bar and the lower chain located in the hollow support square tube.

[0062] Chain support frame 406 rear end through the mounting seat and mounting plate, provided with a motor, motor through the chain drive, drive chain conveyor II 405 chain wheel rotation, thus driving the chain movement.

[0063] Also includes several long articulated arms 502, long articulated arms 502 are "L" type, long articulated arms 502 short end with the recess frame 404 articulated, on both sides of each recess frame 404 symmetrically arranged several groups of long articulated arms 502, long articulated arms 502 long end is articulated with connecting rod 503, articulated point 504 on the long articulated arms 502 with chain support frame 406 articulated, articulated point 504 is arranged on the long articulated arms 502 short side, constituting a simple pendulum mechanism.

[0064] Fork arm frame 401 mounted with a cylinder 505, cylinder 505 tail end rotationally mounted in the fork arm frame 401, cylinder 505 telescopic end and push rod 506 rotationally connected, push rod 506 both ends are connected with one of the long articulated arms 502, through the cylinder 505 push rod 506, push rod 506 drive long articulated arms 502 rotation, thereby lifting the chain support frame 406, the entire chain conveyor II 405 from the recess frame 404 is lifted and contacted with the tray bottom, and can drive the tray movement, such as Figure 2 shown.

[0065] As shown in Figure 2 and Figure 6 , the fork arm conveyor 4 from the lifting platform 3 slide out, in this embodiment using guide rail trolley 402 and guide rail 403, in the lifting platform 3 along the length direction is provided with guide rail 403, the fork arm conveyor 4 on the corresponding guide rail 403 is provided with guide rail trolley 402, the guide rail trolley 402 can move along the guide rail 403, drive the fork arm conveyor 4 from the lifting platform 3 slide out; of course, also can be used as rack and pinion, screw and slider and other linear back and forth movement of the technology to replace, they are all equivalent technology.

[0066] As shown in Figures 8-10As shown, the guide rail trolley 402 includes a trolley motor 4021 mounted at the tail in the fork arm frame 401, a plurality of upper rotating shafts 4022 are rotatably mounted on the fork arm frame 401 by bearings, upper rollers 4023 are mounted at both ends of the upper rotating shafts 4022, adjacent two upper rotating shafts 4022 are connected with each other through a trolley transmission system 4024 to realize power transmission, the trolley transmission system 4024 adopts a chain transmission mode, that is, adjacent two upper rotating shafts 4022 are provided with sprockets and chains, the trolley transmission system 4024 is arranged left and right, on the upper rotating shaft 4022 close to the trolley motor 4021, the trolley motor 4021 rotating shaft drives the rotation thereof through a sprocket and a chain, and it drives the rotation of the adjacent upper rotating shaft 4022 through the trolley transmission system 4024, so as to realize the rotation of all the upper rotating shafts 4022 together; that is, from the upper rotating shaft 4022 closest to the trolley motor 4021, Figure 5 The right side of the upper rotating shaft 4022 is provided with a main transmission sprocket to drive a slave transmission sprocket of the second upper rotating shaft 4022 on the front side through a transmission chain, and the left side of the second upper rotating shaft 4022 is also provided with a main transmission sprocket to drive a slave transmission sprocket of the third upper rotating shaft 4022 through a transmission chain, so as to realize the rotation of all the upper rotating shafts 4022 together.

[0067] The rotation of the upper rotating shaft 4022 drives the movement of the upper roller 4023 along the upper end surface of the guide rail 403, further, a driven lower rotating shaft 4025 is correspondingly arranged below the upper rotating shaft 4022, lower rollers 4026 are also mounted at both ends of the lower rotating shaft 4025, and the lower rollers 4026 move along the lower end surface of the guide rail 403, so as to ensure the stability and reliability of the trolley movement, and prevent the fork arm conveyor 4 from deviating, shaking, jumping and the like during the sliding out or retracting process.

[0068] A laser ranging sensor for detecting the height of the carriage is arranged on the front side of the fixed frame 1, and the laser ranging sensor is connected with a PLC control cabinet. The PLC control cabinet is connected with the electrical elements and electrical control elements of the lifting system 2, the lifting platform 3, the fork arm conveyor 4 and the conveying chain lifting device 5. Embodiment 2

[0069] As shown in Figure 11 and Figure 13 The method for loading and unloading the whole palletized material pile using the palletized material pile loading and unloading device described in embodiment 1 comprises the following steps:

[0070] Loading step:

[0071] 1) The palletized material pile is positioned, and the palletized material is placed on the lifting platform 3 by the forklift or the travelling crane, and the truck is positioned during the placing process;

[0072] 2) The laser ranging sensor detects the height of the truck carriage, and the lifting system 2 lifts the lifting platform 3 to the height of the truck carriage;

[0073] 3) the fork conveyor 4 enters the vehicle compartment;

[0074] 4) the chain conveyor mechanism II 405 of the fork conveyor 4 is raised to contact the pallet, the chain conveyor mechanism I 302 on the lifting platform 3 carries the materials to the vehicle compartment, and when the materials are transported to the chain conveyor mechanism II 405 of the fork conveyor 4, the materials are sent into the vehicle compartment by the chain conveyor mechanism II 405;

[0075] 5) after the materials are sent to the vehicle compartment, the chain conveyor mechanism II 405 of the fork conveyor 4 is lowered to disengage from the pallet, the fork conveyor 4 is retracted, the truck departs, and the lifting platform 3 is lowered back to the initial position to wait;

[0076] And the unloading steps are:

[0077] 6) after the truck is positioned, the laser distance sensor detects the height of the vehicle compartment, and the lifting system 2 lifts the lifting platform 3 to the height of the vehicle compartment;

[0078] 7) the fork conveyor 4 enters the vehicle compartment;

[0079] 8) the chain conveyor mechanism II 405 of the fork conveyor 4 is raised to contact the pallet,

[0080] the materials are carried out of the vehicle compartment;

[0081] 9) after the materials are sent to the vehicle compartment, the chain conveyor mechanism II 405 of the fork conveyor 4 is lowered to disengage from the pallet;

[0082] 10) the fork conveyor 4 is retracted, and the truck departs;

[0083] 11) the lifting platform 3 is lowered back to the initial position, the pallet with materials is transported away by the forklift or the travelling crane, and the truck is positioned during the stacking process.

[0084] The pallet structure in the embodiment is the pallet commonly used in the existing tobacco and logistics, but preferably, the bottom adopts 3 sleepers, as shown in Figure 12 .

[0085] The technical solution is suitable for loading and unloading whole vehicles of stacked materials with pallets, such as the tobacco industry and the barreled water factory. At present, most of the auxiliary materials in the tobacco industry, such as corrugated cartons and film materials, are transported by van trucks.

[0086] The present application is described in detail through specific and preferred embodiments, but those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and any modifications, equivalent replacements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A palletized unit load device characterized by, The fixed rack (1) is provided with lifting platform (3) capable of placing pallets on it through lifting system (2), chain conveying mechanism I (302) is installed in lifting platform (3), chain conveying mechanism I (302) can drive pallets to move, fork arm conveyor (4) is also installed in lifting platform (3), fork arm conveyor (4) can slide out from lifting platform (3), chain conveying mechanism II (405) is installed at the top of fork arm conveyor (4), chain conveying mechanism II (405) can be in contact with pallets through conveying chain lifting device (5) and drive pallets to move along chain conveying mechanism II (405), or be out of contact with pallets through conveying chain lifting device (5); Guide rail (403) is installed in lifting platform (3) along the length direction, guide rail trolley (402) is installed on fork arm conveyor (4) corresponding to guide rail (403), guide rail trolley (402) can move along guide rail (403) and drive fork arm conveyor (4) to slide out from lifting platform (3); Fork arm frame (401) is provided with recess frame (404) at the top, chain support frame (406) is hinged to recess frame (404) through short hinge support arm (501) at the front and rear ends respectively; Long hinge arm (502) is also included, long hinge arm (502) is in the shape of "L", short end of long hinge arm (502) is hinged to recess frame (404), long end of long hinge arm (502) is hinged to connecting rod (503), hinge point (504) on long hinge arm (502) is hinged to chain support frame (406), cylinder (505) drives long hinge arm (502) to rotate; Laser ranging sensor is also included, laser ranging sensor is provided on the front side of fixed rack (1) to detect the height of vehicle compartment.

2. A palletized load handling apparatus according to claim 1, wherein, Vertical beam (102) at the four corners of fixed rack (1) is respectively provided with lead screw (205), lead screw (205) is provided with lead screw sliding block (206), lead screw sliding block (206) is connected with platform rack (301), platform rack (301) moves up and down through the rotation of lead screw (205).

3. A palletized load handling apparatus according to claim 2, wherein, Lifting system (2) includes lifting motor (201), lifting motor (201) drives horizontal driven rotating shaft (204) arranged on cross beam (103) to rotate through main transmission shaft (202), horizontal driven rotating shaft (204) is connected with lead screw (205).

4. A palletized load handling apparatus according to claim 1, wherein, Two groups of chain conveying mechanism I (302) are arranged along the length direction of lifting platform (3).

5. A palletized load handling apparatus according to claim 4, wherein, One fork arm conveyor (4) is arranged between each group of chain conveying mechanism I (302).

6. A method of using the palletized load handling apparatus of claim 1, wherein, The following steps are included: Loading step: 1) Pallets are in place, pallets are placed on lifting platform (3) by forklift or travelling crane, and the truck is in place during the placement process; 2) Laser ranging sensor detects the height of truck compartment, lifting system (2) lifts lifting platform (3) to the height of truck compartment; 3) Fork arm conveyor (4) enters the compartment; 4) The chain conveyor mechanism II (405) of the fork arm conveyor (4) is raised to contact the pallet, and the material is transported to the carriage; 5) After the material is transported to the carriage, the chain conveyor mechanism II (405) of the fork arm conveyor (4) is lowered to disengage from the pallet; the fork arm conveyor (4) is retracted, the truck drives away, and the lifting platform (3) is lowered to the initial position to wait; Unloading steps: 6) After the truck is in place, the laser ranging sensor detects the height of the truck carriage, and the lifting system (2) lifts the lifting platform (3) to the height of the truck carriage; 7) The fork arm conveyor (4) enters the carriage; 8) The chain conveyor mechanism II (405) of the fork arm conveyor (4) is raised to contact the pallet, and the material is transported out of the carriage; 9) After the material is transported out of the carriage, the chain conveyor mechanism II (405) of the fork arm conveyor (4) is lowered to disengage from the pallet; 10) The fork arm conveyor (4) is retracted, and the truck drives away; 11) The lifting platform (3) is lowered to the initial position, and the pallet with the material is transported away by a forklift or a travelling crane, and the truck is in place during stacking.

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