Tray automatic transmission system is an important part of automatic warehouse, it has the function of various logistics link up standing hydrogen, in connecting people and Labour, Labour and Labour, processing and storage, processing and assembling of the logistics links such as at the same time, also have the function of material staging and buffer. Through the reasonable use of pallet conveying system automation, can make the closer connection between each working procedure, improve the efficiency of production, this is the essential link of logistics means of regulation.

In automated warehouse loading and unloading system, the tray automation conveying system generally includes the function of transmission and receiving, processing and storage materials, often including complete dimension inspection, weighing, and automatic identification, and other functions. Finish the tray goods from point a to point b, tray and material transfer function of space and time, and other functions in the process to complete. Tray automatic conveying system is usually divided into the following pattern:

1) conveyor model

Alleged conveyor model, it is made up of various automatic conveyor tray automatic transmission system. Pallet conveyor roller type, chain, roller, plate, a variety of forms such as lifting platform, in the automated warehouse system, in order to satisfy the system capacity requirements in pallet, generally choose transport efficiency higher roller type, chain conveyor of pallet conveying system automation. According to the demand of the automatic transmission, synthesis can be transmitted using a single type of unit has a specific function of tray automatic conveying system, also can according to need, is composed of several kinds of conveyor mixed with a specific function of pallet conveying system automation.

2) reciprocating shuttle car model

Reciprocating shuttle car is a new kind of rail material carrier, rapid shuttle run in a fixed orbit, material handling system. In some special conditions, composed of reciprocating the shuttle automated material handling system, is very simple and convenient. Such as on the outside of the roadway more three-dimensional library, in order to complete the loading and unloading automation tray homework, usually need a tray relative to the horizontal conveying roadway, is realized by using reciprocating shuttle car to an ideal model.

3) circular shuttle car model

USES annular shuttle car can send tray horizontally, also can undertake vertical transmission, can be more than one shuttle car to work at the same time, the transmission capacity is stronger.

4) the AGV model

Using AGV automation conveying system consisting of AGVS, can send tray for flexibility, conveying distance far away.

Transport mode analysis

1) conveyor model

The advantage of conveyor model is: a, for continuous transmission mode, transmission capacity is big. Continuous conveying, the loading and unloading are conducted in conveying process without pause, not through the light back and cause the conveying discontinuous, because do not often start and brake at the same time, so can use higher transmission speed, its electric airless parts of conveyor can be long service life. B, the structure is simpler. Its action is a single, compact structure, its weight is lighter, low in cost, and due to uniform load, speed stability, power consumed by a job is generally small and little change. C, the length of a single conveyor can be extended, and is composed of many sets of conveyor can be long transmission lines, and easy to realize programmed control and automation. D, on the transmission line can easily handle material cache function.

Its defect is: poor generality, must according to the transport route layout of conveyor, conveyor equipment, conveyor path complex, belong to the category of rigid transport, unfavorable for transport route changes, cost is higher than reciprocating shuttle car, usually in order to meet the requirements of transport capacity, variegated needs a lot of equipment for the channel, the surface area is too large.

2) reciprocating shuttle car model

Reciprocating shuttle car models become transporter of continuous conveyor for intermittent rapid transportation, transportation for semi flexible rigidity. In order to complete loading and unloading automation tray, usually need a tray relative to the horizontal conveying roadway, reciprocating shuttle car is used to realize is very convenient. The characteristics of this model is: system simple and clear, less equipment, cover an area of an area small, quick delivery, shuttle bus can design automatic pickup device, can transport large quality of pallet. Its defect is: reciprocating shuttle car transport capacity is limited, for large three-dimensional library, unfavorable use this way, because of easy to form the outbound capacity bottlenecks, affect the operation of three-dimensional library system. In addition, the reliability of the system reliability by single reciprocating shuttle car contain too much, if the shuttle fails, the system will not be able to complete warehousing operations. Therefore, improve the reliability of shuttle car is particularly important.

3) circular shuttle car model

Circular shuttle car models from reciprocating shuttle car development and shuttle car show cricoid in plane layout, several shuttle vehicles can be run at the same time, overcome the reciprocating shuttle car model performance bottlenecks of defects may be produced, but there are still maintain the advantages of double shuttle car, using circular shuttle car can be horizontal conveying, according to need the tray can be also can undertake vertical transmission, can be more Rao at the same time, the transmission capacity is stronger. But the layout of the annular shuttle car model with rail is more complex, high cost, using wireless communications for its scheduling at the same time, the technology is difficult.

4) the AGV model

AGV model is automatic and high flexible pallet conveying system. AGV model of AGV is adopted to form professional AGVS, can send tray for flexible, conveying distance far away. Stacker and directly connected to the transmission platform of the mouth, AGVS is connected to delivery platform. AGV can under the automatic scheduling of computer system, the material handling extended to every link of production line, has finished the intelligent energy supply system and a variety of security system, so some people say that "AGV is tired porters. And when you need to make change of production process, advanced AGVS (such as laser guided vehicle system LGVS) simply implement a computer program of change, it is good for protect the user's investment. The only drawback is the high cost for the model type.

For specific automated warehouse system tray of the implementation of the automatic conveying system, need according to the actual, specific analysis. The above various automated transport modes, each have their advantages and disadvantages, the demand of the system design must first be clear when handling system. How to choose cost-effective, the ideal model of transport, there are the following factors is very important:

1, the specific requirements of transporting goods and tray. Three-dimensional library to store what items, some items need to design a special conveyor; The standardization of the tray is very important, it is necessary technical basis for modern logistics.

2, meet the demand of transport capacity, loading and unloading capacity automated stereoscopic warehouse must match the pallet conveying system automation of transport capacity, under normal circumstances, require pallet conveying system automation for ins and outs of the transport capacity of slightly higher than the automation stereoscopic warehouse capacity.

3, economy. On the premise of meet the demand, must adopt comparative economic mode of transport, lest cause unnecessary waste.