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Inspection of Vertical Transportation Equipment_12

Tham khảo tài liệu 'inspection of vertical transportation equipment_12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http www.simpopdf.com FIGURE 16-19 Upper Sheave Assembly 16-29 Simpo PDF Merge and Split Unregistered Version - http www.simpopdf.com CHAPTER 17 BOX CONVEYORS 17.1 INTRODUCTION NOTE Paragraphs identified with a vertical. line in the left margin are inspections that should be made by Certified Vertical Transportation Equipment Inspectors only. 17.1.1 Scope The inspection of box conveyors included in this chapter is not only an inspection of all safety related functions but puts heavy emphasis on an inspection to determine the condition of the equipment and identify areas that need improvement. Proper maintenance is needed to keep the conveying systems operating in an efficient manner. When preventive maintenance is lacking shutdowns will occur. The design and application of these devices give the user only limited access to the operating equipment. Therefore user safety considerations are quite limited. This chapter will identify these safety items as well as performance considerations. See Figures 17-1 and 17-2 which show various box conveyor arrangements with component names that will be used in this chapter. 17.1.2 Use Box Conveyors are generally used to transport small loads 20 pounds or less from place to place in either a vertical or horizontal direction. The systems can be as simple as two stations or as complex as several hundred interconnected stations. The devices are found in a number of hospitals and in some office buildings. They carry a variety of items such as supplies mail records drugs etc. There are two basic types of box conveyors that will be discussed in this chapter. Because of the major difference between the two we will address the inspection of each separately. 17.1.3 Applicable Safety Standards There is no safety standard written specifically for this type of equipment. Section 5 GENERAL SAFETY STANDARDS AnSI AsMe B20.1 Safety Standards for Conveyors and Related Equipment could be used as .