A support tray automatic conveying and caching system

Abstract

The present invention discloses a car bumper buffer lifting and handling system, which includes a lifting unit, a buffer library, a transport trolley and an aluminum profile structure; the lifting unit includes a lifting tray, a storage cylinder, a tray pneumatic block, a lifting guide unit, etc.; the buffer library includes an upper limit sensor, an upper addend sensor, an upper full library sensor, an upper double speed chain, a partition pneumatic block, a half library sensor, an upper drive motor, an upper outgoing pneumatic block, an upper subtractor sensor, a lower limit sensor, a lower drive motor, a lower outgoing pneumatic block, an empty tray push cylinder, etc.; the transport trolley includes a trolley lower layer smooth bar and a trolley upper layer smooth bar. The system lifts the bumpers manually placed on the lifting tray and transfers them in groups to the transport trolley, which is towed away by a tractor, thereby reducing the labor intensity and error rate of the workers, avoiding manpower loss and product damage during the handling process, and realizing efficient and intelligent management of the bumpers.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing automation, and in particular to an automatic conveying and caching system for a support tray. Background Art

[0002] With the development of society, the types and quantity of cars are increasing, and safety is also an issue that manufacturers have to pay attention to. The bumper is a device that absorbs and mitigates external impact when the vehicle or driver is subjected to a collision, creating a buffer to protect people and cars. In addition to maintaining the original protective function, the front and rear bumpers of the vehicle also pursue harmony and unity with the body shape and pursue their own lightweight.

[0003] At present, the front and rear bumpers of cars are made of plastic, which is called plastic bumper. Plastic bumper is composed of three parts: outer plate, buffer material and cross beam. Plastic bumper has strength, rigidity and decorativeness. From the perspective of safety, it can play a buffering role and protect the front and rear body of the vehicle when a collision occurs. From the appearance point of view, it can be naturally combined with the body of the vehicle, forming a whole, with good decorativeness, and become an important part of decorating the appearance of the vehicle. The production of bumpers is mostly mass-produced. The existing bumper production has basically realized the automation of injection molding machines and painting lines. After the car bumper is sprayed, it needs to go through the parts assembly line to assemble decorative parts, lights, air intake grilles and other parts. After the assembly is completed, it is manually transported to the transport trolley support pallet and transported to the final assembly workshop for vehicle assembly. This process requires a lot of manual actions to complete the transportation and loading of the bumper.

[0004] However, due to the rapid iteration of vehicle models, finished bumpers need to be manually assembled and then loaded onto a trolley, which is then transported to the final assembly workshop. In order to avoid scratches, the bumper is supported and fixed individually by a support pallet on the trolley. During this process, the empty pallet needs to be moved down from the lower layer of the trolley manually, and then moved to the upper layer of the trolley after the bumper is fixed. Manual handling is frequent, labor-intensive, and takes a long time. With the improvement of the automation level of vehicle production lines, the production rhythm of bumpers is getting faster and faster. In order to adapt to the overall production speed and requirements, the production rhythm of bumper handling also needs to be improved. Manual handling and loading can no longer achieve higher work efficiency, and labor costs are also getting higher and higher. There are also certain risks and error rates. At present, lifting and handling takes up a lot of manual handling time. Therefore, it is very necessary to improve the automation level of lifting and handling of bumpers. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic conveying and caching system for a support pallet, which can continuously complete the bumper lifting and transportation process, has a high degree of human controllability, can meet the production rhythm and demand of the bumper, improve production efficiency, improve the working environment, reduce the labor intensity and error rate of workers, avoid manpower loss during the transportation process, and realize efficient and intelligent management of the bumper transportation process.

[0006] To achieve the purpose of the present invention, the present invention provides an automatic conveying and caching system for support pallets, the system comprising a lifting unit, a cache library, and a transport trolley; one end of the cache library is connected to the transport trolley, and the other end is connected to the lifting unit; the cache library comprises a cache library lower layer for caching the support pallets and a cache library upper layer for caching support pallets with bumpers, the transport trolley comprises a trolley lower layer for conveying support pallets and a trolley upper layer for conveying support pallets with bumpers; the cache library lower layer and the cache library upper layer are respectively docked with the trolley lower layer and the trolley upper layer for use;

[0007] The support pallet enters one side of the lower layer of the cache warehouse from the lower layer of the trolley, the support pallet cached in the lower layer of the cache warehouse moves from one side of the lower layer of the cache warehouse to the other side, and enters the lifting unit in sequence from the lower layer of the cache warehouse, after the support pallet entering the lifting unit is placed on the bumper, the lifting unit lifts it to a position corresponding to the upper layer of the cache warehouse, the support pallet placed on the bumper enters one side of the upper layer of the cache warehouse, the support pallet placed on the bumper cached in the upper layer of the cache warehouse moves from one side of the upper layer of the cache warehouse to the other side, and the support pallet placed on the bumper enters the upper layer of the trolley from the upper layer of the cache warehouse.

[0008] Furthermore, the lifting unit includes a lifting pallet, a warehouse delivery cylinder, a pallet pneumatic stopper, a lifting guide unit, a lifting chain, a lifting drive motor, a guide groove, a lifting fixed bracket, and a warehouse delivery push plate;

[0009] The lifting and fixing bracket is U-shaped, and guide grooves are formed on the inner sides of the brackets on both sides. A lifting drive motor is installed on the lifting and fixing bracket, and the lifting drive motor drives two lifting chains arranged in the guide grooves to rotate. The two lifting chains are respectively connected to one side of the lifting pallet through the lifting guide unit, and drive the lifting pallet to rise and fall. A warehouse feeding cylinder is provided on the lifting pallet, and the warehouse feeding cylinder is connected to a warehouse feeding push plate and can drive the warehouse feeding push plate to move. A block cylinder is provided on the lifting pallet, and a pallet pneumatic block is installed on the block cylinder. The support pallet can be limited by the rising of the pallet pneumatic block.

[0010] Furthermore, the lifting guide unit includes an axial guide wheel, a radial guide wheel and a connecting plate, one side of the connecting plate is connected to the lifting tray, and the other side is fixedly connected to the lifting chain, and an axial guide wheel, two radial guide wheels and one axial guide wheel are longitudinally arranged in a straight line in sequence, wherein the wheel axles of the radial guide wheel and the axial guide wheel are vertically arranged, the angle between the two is 90 degrees, and they are slidably connected to the side walls of the guide groove.

[0011] Furthermore, the cache library further comprises a cache library fixing bracket, and the cache library lower layer and the cache library upper layer are respectively arranged on the lower side and the upper side of the cache library fixing bracket,

[0012] The lower layer of the cache includes two lower layer double-speed chains arranged on the fixed brackets of the cache on both sides and used in coordination with each other. The two lower layer double-speed chains are driven to rotate by the lower layer driving motor, and the empty support tray is moved from one side to the other side by the lower layer double-speed chains;

[0013] The upper layer of the cache includes two upper double-speed chains arranged on the fixed brackets of the cache on both sides and used in conjunction with each other. The two upper double-speed chains are driven to rotate by the upper driving motor, and the support tray with the bumper placed thereon is moved from one side to the other side by the upper double-speed chains;

[0014] The buffer library fixed bracket is provided with an upper limit sensor and a lower limit sensor for detecting whether the lifting tray is in place; an upper adder sensor, an upper subtractor sensor, and an upper full-storey sensor are provided for judging the number of upper bumpers of the buffer library and thus determining whether the lifting tray can rise, and determining whether the upper drive motor drives the upper speed chain to rotate or stop;

[0015] The buffer warehouse fixed bracket is provided with a lower layer subtraction sensor and a lower layer addition sensor for judging the number of empty support pallets in the lower layer of the buffer warehouse and controlling the lower layer drive motor to drive the lower layer speed chain to rotate or stop; and a lower layer outbound pneumatic block and a queuing pneumatic block are provided for queuing control of the empty support pallets.

[0016] -Furthermore, a half-warehouse sensor and a partition pneumatic block are provided on the fixed bracket of the cache warehouse, and the eight bumpers on the upper layer of the cache warehouse are divided into two groups through the half-warehouse sensor and the partition pneumatic block, and the transport trolley only transports one group at a time; the upper-layer outbound pneumatic block blocks the other group of bumpers, so that only one group of bumpers can be transferred to the upper layer of the transport trolley for transportation.

[0017] Furthermore, a trolley fixing cylinder is provided on the side of the cache warehouse fixing bracket connected to the transport trolley. The transport trolley and the cache warehouse fixing bracket can be tightly connected by extending the piston rod of the trolley fixing cylinder upward, thereby preventing the transport trolley from sliding due to force during the mutual transmission process, causing unnecessary losses.

[0018] Furthermore, the upper addend sensor, upper full-stock sensor, half-stock sensor, upper subtrahend sensor, lower subtrahend sensor, and lower addend sensor all use photoelectric sensors; the upper limit sensor and lower limit sensor use metal sensors.

[0019] Furthermore, the upper addend sensor and the upper full warehouse sensor are installed on the upper layer of the cache warehouse close to the lifting unit; the half warehouse sensor and the partition pneumatic block are installed in the middle position of the upper layer of the cache warehouse; the upper subtrahend sensor is installed on the transport trolley side, and the upper outbound pneumatic block is installed at the same distance as the upper subtrahend sensor; the lower inbound pneumatic block and the lower addend sensor are installed on the lower layer of the cache warehouse close to the transport trolley; the lower outbound pneumatic block and the lower subtrahend sensor are installed on the lower layer of the cache warehouse close to the lifting unit.

[0020] Furthermore, the transport trolley includes a trolley bracket, the trolley upper layer and the trolley lower layer are respectively arranged on the upper side and the lower side of the trolley bracket, and the trolley lower layer and the trolley upper layer are respectively provided with a trolley lower layer smoothing bar and a trolley upper layer smoothing bar.

[0021] Furthermore, the lower layer and the upper layer of the trolley are both inclined relative to the horizontal plane, and the upper layer of the trolley is higher on the left and lower on the right, while the lower layer of the trolley is lower on the left and higher on the right.

[0022] Among them, the warehouse delivery cylinder can also be an electric cylinder; the lifting guide unit can also be in the form of a slide rail slider.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The system is designed with a lifting unit, so that workers can directly place the bumper on an empty support pallet, which can avoid the possibility of danger caused by workers carrying the bumper to a high place, and has a protective effect on each bumper; it reduces the labor intensity of workers and damage to products, avoids manpower and time loss during the transportation process, and realizes efficient and intelligent production management of bumpers.

[0025] (2) The system cache has two layers, and the movement is independently controlled, so that the receiving of empty support pallets and the transmission of bumpers do not interfere with each other; an empty tray queue area is set up in the lower layer of the cache so that the lifting unit can receive empty pallets in sequence, avoiding interference with the lifting unit caused by the unpartitioned support pallets.

[0026] (3) The upper level of the buffer warehouse uses a half-warehouse sensor and a partitioned pneumatic block to evenly divide the support pallets with bumpers lifted to the upper level into a group of four, so that the upper level of the transport trolley can transport four pallets each time. This not only avoids the reduction in effective space utilization due to insufficient transportation, but also prevents excessive pallets from being supplied to the transport trolley and being unable to accommodate them, causing excess pallets to fall off and cause product damage. It can also cache bumpers, thereby reducing waiting time for the transport trolley and greatly improving efficiency.

[0027] (4) The trolley fixing cylinder of the buffer warehouse tightly connects the transport trolley and the buffer warehouse to prevent the transport trolley from sliding due to force during the mutual transmission process, causing unnecessary losses.

[0028] (5) The upper and lower layers of the transport trolley are designed to be inclined and equipped with smooth strips, so that the empty tray and bumper can move smoothly by relying on gravity. The empty tray slides to the lower layer of the buffer warehouse by relying on gravity and the lower layer of the double-speed chain, and the support tray with the bumper slides to the upper layer of the buffer warehouse by relying on gravity and the upper layer of the double-speed chain, reducing the demand for power devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shown is a schematic diagram of the structure of this application.

[0030] Figure 2 Shown is a schematic structural diagram of the lifting unit of the present application;

[0031] Figure 3 Shown is a schematic structural diagram of the lifting and guiding unit of the present application;

[0032] Figure 4 Shown is a schematic diagram of the structure of the cache library of this application;

[0033] Figure 5 Shown is a partial structural schematic diagram of the connection side of the cache library and the lifting unit of the present application;

[0034] Figure 6 Shown is a partial structural schematic diagram of one side of the connection between the cache and the transport trolley of the present application;

[0035] Figure 7 Shown is a schematic diagram of the structure of the pneumatic stopper in this application;

[0036] Figure 8 Shown is a schematic diagram of the structure of the transport trolley in this application;

[0037] In the figure, 1-lifting unit, 2-buffer, 3-transport trolley, 11-lifting pallet, 12-delivery cylinder, 13-pallet pneumatic stopper, 14-lifting guide unit, 15-lifting chain, 16-lifting drive motor, 17-guide groove, 18-lifting fixed bracket, 19-delivery push plate, 21-upper limit sensor, 22-upper addend sensor, 23-upper full warehouse sensor, 24-upper double speed chain, 25-partition pneumatic stopper, 26 -Half-warehouse sensor, 28-upper layer driving motor, 29-upper layer outbound pneumatic stopper, 210-upper layer subtraction sensor, 212-lower layer outbound pneumatic stopper, 211-empty tray pushing cylinder, 214-lower layer subtraction sensor, 213-queuing pneumatic stopper, 215-lower layer double-speed chain, 216-lower layer adder sensor, 217-lower layer inbound pneumatic stopper, 218-trolley fixing cylinder, 32-trolley lower layer smooth bar, 33-trolley upper layer smooth bar. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] like Figure 1-8 As shown, the technical solution of the present invention to solve the technical problem is to provide a support pallet automatic conveying and caching system, which includes a lifting unit 1, a cache library 2, and a transport trolley 3;

[0041] The lifting unit 1 includes a lifting pallet 11, a storage cylinder 12, a pallet pneumatic block 13, a lifting guide unit 14, a lifting chain 15, a lifting drive motor 16, and a guide groove 17; the cache warehouse 2 includes an upper limit sensor 21, an upper addend sensor 22, an upper full warehouse sensor 23, an upper double-speed chain 24, a partition pneumatic block 25, a half-warehouse sensor 26, an upper drive motor 28, an upper outbound pneumatic block 29, an upper subtrahend sensor 210, a lower limit sensor, a lower drive motor, a lower outbound pneumatic block 212, an empty tray pushing cylinder 211, a lower subtrahend sensor 214, a queuing pneumatic block 213, a lower double-speed chain, a lower addend sensor, a lower inbound pneumatic block, a trolley fixing cylinder 218, and a roller guide device; the transport trolley 3 includes a trolley lower layer smooth bar 32 and a trolley upper layer smooth bar 33. One end of the buffer storehouse 2 is connected to the transport trolley 3, and the other end is connected to the lifting unit 1. The transport trolley 3 is delivered from the lower level, the bumper is taken away from the upper level, and then the transport trolley 3 is towed away.

[0042] The lifting unit 1 includes a lifting pallet 11, a warehouse delivery cylinder 12, a pallet pneumatic block 13, a lifting guide unit 14, a lifting chain 15, a lifting drive motor 16, and a guide groove 17.

[0043] There is a row of small wheels on each side of the lifting tray 11, which can receive the empty support tray and convey the bumper without hindrance;

[0044] The warehouse delivery cylinder 12 is installed on the lifting pallet 11 and moves up and down with the lifting pallet 11, and the warehouse delivery cylinder 12 adopts a parallel cylinder to make the movement process smooth; the pallet pneumatic block 13 can prevent the pallet from sliding during the manual handling of the bumper and the movement of the lifting pallet 11; the lifting guide unit 14 includes radial and axial guide wheels, which are in close contact with the lifting chain 15 and the guide groove 17 at a ninety-degree angle to each other; the lifting drive motor 16 drives the lifting pallet 11 to rise and fall, and the lifting drive motor 16 uses an ordinary AC motor, which drives a group of chains to move through a reduction device.

[0045] The cache warehouse 2 includes an upper limit sensor 21, an upper addend sensor 22, an upper full warehouse sensor 23, an upper double-speed chain 24, a partition pneumatic block 25, a half-warehouse sensor 26, an upper drive motor 28, an upper warehouse-out pneumatic block 29, an upper subtrahend sensor 210, a lower limit sensor, a lower drive motor, a lower warehouse-out pneumatic block 212, an empty tray pushing cylinder 211, a lower subtrahend sensor 214, a queuing pneumatic block 213, a lower double-speed chain, a lower addend sensor, a lower warehouse-in pneumatic block, a trolley fixing cylinder 218, and a roller guide device. The upper limit sensor 21 and the lower limit sensor detect whether the lifting tray 11 is in place; the upper addend sensor 22, the upper subtrahend sensor 210 and the upper full warehouse sensor 23 judge the number of upper bumpers of the buffer warehouse 2 and then decide whether the lifting tray 11 rises, and decide whether the upper drive motor 28 drives the upper double-speed chain 24 to rotate or stop; the half warehouse sensor 26 and the partition pneumatic block 25 divide the upper layer of up to eight bumpers into two groups, and the transport trolley 3 transports one group at a time; the upper warehouse outbound pneumatic block 29 blocks the next group of bumpers, so that only one group can be transferred to the upper layer of the transport trolley 3 for transportation; the lower subtrahend sensor 214 and the lower addend sensor The number of empty support pallets on the lower level of cache 2 is judged, and it is decided whether the lower driving motor drives the lower speed chain to rotate or stop; the lower level outbound pneumatic block 212 and the queuing pneumatic block 213 only allow one empty support pallet to enter the queuing position, without affecting the operation of the lifting pallet 11; the empty tray pushing cylinder 211 pushes the empty support pallet at the queuing position onto the lifting pallet 11; the lower level inbound pneumatic block blocks the empty support pallets from the lower level of the transport trolley 3 when the lower level of cache 2 is full; the trolley fixing cylinder 218 extends out to fix the trolley after the transport trolley 3 is connected to cache 2, and then the system can receive the empty support pallets and conveying bumpers. The roller guide device allows the transport trolley 3 to be accurately connected to the cache 2 (not shown in the figure);

[0046] The transport trolley 3 comprises a lower trolley smoothing bar 32 and an upper trolley smoothing bar 33. The upper and lower layers of the transport trolley 3 are at a certain angle, and the smoothing bars are assembled on the upper and lower layers, so that the transmission of the empty support tray and the bumper receiving do not require power.

[0047] The control system of the whole system includes a controller, a communication device, manual input signals and sensor signals; the controller judges various signals respectively through the communication device to control the whole system to run accurately.

[0048] Working process:

[0049] The lifting unit 1 (see Figure 2)After receiving the empty support pallet from the cache 2, the pallet pneumatic stopper 13 fixes the empty support pallet in the lifting pallet 11, manually puts the bumper on the empty support pallet, and presses the control box set separately on the side, the control system sends a signal to let the lifting drive motor 16 rotate forward, driving the lifting chain 15 to rotate, and the lifting chain 15 then drives the lifting pallet 11 to move slowly upward along the guide groove 17 through the lifting guide unit 14. After the upper limit sensor 21 of the cache 2 detects the lifting pallet 11, the lifting drive motor 16 stops rotating. After the pallet pneumatic stopper 13 drops into place, the warehouse delivery cylinder 12 pushes the empty support pallet with the bumper placed on it to the upper layer of the cache 2, and the control system controls the lifting drive motor 16 to reverse, driving the lifting pallet 11 to descend. After the lower limit sensor (not marked) of the cache 2 detects the lifting pallet 11, the motor stops rotating and enters the next working cycle.

[0050] The cache library 2 (see Figure 3 ) After being connected to the transport trolley 3 through the roller guide device, manually press the control box set on the side, and the trolley fixing cylinder 218 extends out to grasp the transport trolley 3; manually open the mechanical blocks of the upper and lower layers of the transport trolley to facilitate the lower layer input and upper layer output of the support pallet.

[0051] The number of empty support pallets on the lower layer of cache warehouse 2 is determined by the lower layer adder sensor and the lower layer subtractor sensor 214. If it is less than eight, the lower layer entry pneumatic block will be actuated, and the empty support pallets will slide onto the lower layer speed chain. When the number of empty support pallets on the lower layer of cache warehouse 2 is equal to eight, the lower layer entry pneumatic block will be restored.

[0052] When the lifting tray 11 is lowered into place, the queuing pneumatic block 213 is activated, and the lower driving motor starts to rotate, and the empty support tray at the queuing position is conveyed forward, and then the empty support tray push cylinder extends to push the empty support tray onto the lifting tray 11. Then the queuing pneumatic block 213 is restored, and the lower-level outbound pneumatic block 212 is activated, and the next empty support tray is conveyed forward to the queuing position, and the lower-level outbound pneumatic block 212 is restored, and the following empty support trays are conveyed forward a certain distance in turn, and the lower driving motor stops rotating.

[0053] When the upper level of the cache warehouse 2 receives an empty support pallet with bumpers, if the control system detects signals through the upper level adder sensor 22 and the upper level subtractor sensor 210 and determines that the number of upper level bumpers is less than or equal to eight, the partition pneumatic block 25 is restored, the upper level outbound pneumatic block 29 is actuated, the upper level drive motor 28 starts to rotate, the bumpers start to be transported, and the front group of four bumpers is transported to the upper level of the transport trolley 3.

[0054] Then the upper outbound pneumatic stopper 29 is restored, and the partition pneumatic stopper 25 is activated to transfer the second set of bumpers to the front.

[0055] When the half-store sensor 26 detects a signal indicating that a group of four in front has been reached for a long time, the partition pneumatic stopper 25 is restored. At this moment, the trolley fixed cylinder 218 should be retracted and the transport trolley 3 is no longer grasped.

[0056] If all upper sensors detect signals and the entire system does not receive a signal from the arrival of the transport trolley 3, it means that the number of upper bumpers in the buffer 2 has reached the maximum value, and the entire system should stop running.

[0057] The transport trolley 3 (see Figure 8 ) After receiving the signal that a set of bumpers has been transmitted from the buffer 2, the tractor moves the transport trolley 3 to other places and tows another transport trolley 3 loaded with an empty support pallet to carry out the next cycle.

[0058] It should be noted that the pallet pneumatic block, partition pneumatic block, upper outbound pneumatic block, lower outbound pneumatic block, queuing pneumatic block and lower inbound pneumatic block in the present application can all be adopted as follows: Figure 8 The structure is that a cylinder drives a block to realize the rise or fall of the block.

[0059] It should be noted that the technical solutions not described in detail in this application adopt publicly known technologies.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A support tray automatic conveying and caching system, characterized in that: The system includes a lifting unit, a buffer storehouse, and a transport trolley; one end of the buffer storehouse is connected to the transport trolley, and the other end is connected to the lifting unit; the buffer storehouse includes a buffer storehouse lower layer for caching the support pallet and a buffer storehouse upper layer for caching the support pallet with a bumper, and the transport trolley includes a trolley lower layer for conveying the support pallet and a trolley upper layer for conveying the support pallet with a bumper; the buffer storehouse lower layer and the buffer storehouse upper layer are respectively docked with the trolley lower layer and the trolley upper layer for use; The support tray enters one side of the lower layer of the cache warehouse from the lower layer of the trolley, the support tray cached in the lower layer of the cache warehouse moves from one side of the lower layer of the cache warehouse to the other side, and enters the lifting unit from the lower layer of the cache warehouse in sequence, after the support tray entering the lifting unit is placed on the bumper, the lifting unit lifts it to a position corresponding to the upper layer of the cache warehouse, the support tray placed on the bumper enters one side of the upper layer of the cache warehouse, the support tray placed on the bumper cached in the upper layer of the cache warehouse moves from one side of the upper layer of the cache warehouse to the other side, and the support tray placed on the bumper enters the upper layer of the trolley from the upper layer of the cache warehouse. The cache library also includes a cache library fixed bracket, the cache library lower layer and the cache library upper layer are respectively arranged on the lower side and the upper side of the cache library fixed bracket, the cache library lower layer includes two lower layer double-speed chains arranged on the cache library fixed brackets on both sides and used in conjunction with each other, the two lower layer double-speed chains are driven to rotate by the lower layer driving motor, and the empty support tray is moved from one side to the other side by the lower layer double-speed chains; The upper layer of the cache includes two upper double-speed chains arranged on the fixed brackets of the cache on both sides and used in conjunction with each other. The two upper double-speed chains are driven to rotate by the upper driving motor, and the support tray with the bumper placed thereon is moved from one side to the other side by the upper double-speed chains; The buffer library fixed bracket is provided with an upper limit sensor and a lower limit sensor for detecting whether the lifting tray is in place; an upper adder sensor, an upper subtractor sensor, and an upper full-storey sensor are provided for judging the number of upper bumpers of the buffer library and thus determining whether the lifting tray can rise, and determining whether the upper drive motor drives the upper speed chain to rotate or stop; The fixed bracket of the buffer storehouse is provided with a lower layer subtraction sensor and a lower layer addition sensor for judging the number of empty support pallets in the lower layer of the buffer storehouse and controlling the lower layer driving motor to drive the lower layer double-speed chain to rotate or stop; a lower layer outbound pneumatic block and a queuing pneumatic block for queuing the empty support pallets are provided; The buffer library fixed bracket is provided with a half-library sensor and a partition pneumatic block, which divides the eight bumpers on the upper layer of the buffer library into two groups, and the transport trolley only transports one group at a time; the upper layer outbound pneumatic block blocks the other group of bumpers, so that only one group of bumpers can be transferred to the upper layer of the transport trolley for transportation; A trolley fixing cylinder is provided on the side of the buffer library fixing bracket connected to the transport trolley, and the trolley fixing cylinder piston rod is extended upward to tightly connect the transport trolley and the buffer library fixing bracket, thereby preventing the transport trolley from sliding due to force during the mutual transmission process, causing unnecessary losses; The upper addend sensor, upper full-stock sensor, half-stock sensor, upper subtrahend sensor, lower subtrahend sensor, and lower addend sensor all use photoelectric sensors or mechanical touch switch sensors; the upper limit sensor and lower limit sensor use metal sensors; The upper addend sensor and the upper full warehouse sensor are installed on the upper layer of the cache warehouse near the lifting unit; the half warehouse sensor and the partition pneumatic block are installed in the middle position of the upper layer of the cache warehouse; the upper subtrahend sensor is installed on the transport trolley side, and the upper warehouse-out pneumatic block is installed at the same distance as the upper subtrahend sensor; the lower warehouse-in pneumatic block and the lower addend sensor are installed on the lower layer of the cache warehouse near the transport trolley side; the lower warehouse-out pneumatic block and the lower subtrahend sensor are installed on the lower layer of the cache warehouse near the lifting unit side.

2. The automatic transport and caching system for support trays according to claim 1, characterized in that: The lifting unit includes a lifting pallet, a storage cylinder, a pallet pneumatic stopper, a lifting guide unit, a lifting chain, a lifting drive motor, a guide groove, a lifting fixed bracket, and a storage push plate; The lifting fixed bracket is a U-shaped or other type of bracket, and guide grooves are formed on the inner sides of the brackets on both sides. A lifting drive motor is installed on the lifting fixed bracket, including a DC servo, an AC servo or a stepping motor. The lifting drive motor drives the two lifting chains arranged in the guide groove to rotate. The two lifting chains are respectively connected to one side of the lifting pallet through a lifting guide unit, and drive the lifting pallet to rise and fall. A warehouse feeding cylinder is provided on the lifting pallet, and the warehouse feeding cylinder is connected to a warehouse feeding push plate and can drive the warehouse feeding push plate to move. A block cylinder is provided on the lifting pallet, and a pallet pneumatic block is installed on the block cylinder. The support pallet can be limited by the rising of the pallet pneumatic block.

3. The automatic transport and caching system for support trays according to claim 2, characterized in that: The lifting guide unit includes an axial guide wheel, a radial guide wheel and a connecting plate, one side of the connecting plate is connected to the lifting tray, and the other side is fixedly connected to the lifting chain, and an axial guide wheel, two radial guide wheels and one axial guide wheel are longitudinally arranged in a straight line in sequence, wherein the wheel axles of the radial guide wheel and the axial guide wheel are vertically arranged, the angle between the two is 90 degrees, and they are slidably connected to the side walls of the guide groove.

4. The automatic transport and buffering system for support trays according to claim 1, characterized in that: The transport trolley comprises a trolley support, the trolley upper layer and the trolley lower layer are respectively arranged on the upper side and the lower side of the trolley support, and the trolley lower layer and the trolley upper layer are respectively provided with a trolley lower layer smoothing strip and a trolley upper layer smoothing strip.

5. The automatic transport and buffering system for support trays according to claim 4, characterized in that: The lower layer and the upper layer of the trolley are both arranged to be inclined with respect to the horizontal plane, and the upper layer of the trolley is higher on the left and lower on the right, while the lower layer of the trolley is lower on the left and higher on the right.

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