Book trolley which makes it convenient to put boos back to high-layer bookshelf

Abstract

The invention discloses a book trolley which makes it convenient to put books back to a high-layer bookshelf. The book trolley comprises a base, idler wheels arranged at the bottom of the base, several transverse plates, a left stand plate and a right stand plate, a first side table and a second side table are arranged at the top of the base, the first side table is internally provided a first rotary shaft, the first rotary shaft is provided with and sleeved with a first gear, the first gear can rotate with the first rotary shaft and is provided with a second gear matched with the first gear, the second gear can rotate with the first gear and is provided with a second rotary shaft, one end of the second rotary shaft is inserted on the center of circle of the second gear in a penetrating mode, a third gear is arranged at the other end of the second rotary shaft, the first side table is further internally provided with a fixed block, the fixed block is internally provided with a movable rod, a rack matched with the third gear is arranged at the bottom of the movable rod, when the third gear rotates, the movable rod is pushed to move in the axial line direction of the fixed block, a cross rod is arranged at the top of the movable rod, and the cross rod is connected with the left stand plate.

Description

technical field [0001] The invention relates to an auxiliary tool for carrying books, in particular to a book cart for putting books back into high-level bookshelves. Background technique [0002] A library is an institution that collects, organizes, and collects books and materials for people to read and refer to. The earliest library appeared as early as 3000 BC. The library has the functions of preserving human cultural heritage, developing information resources, and participating in social education, etc. functions. Since the existence of human society, words have been produced, and the carrier used to record these words - books have also emerged as the times require. It records the development and evolution of human history from ancient times to the present. One of the functions of the library is to collect, process, organize, and scientifically manage these precious literature resources, so that readers can borrow and use them. The library exists as an institution t...

AI Technical Summary

Problems solved by technology

[0003] The book cart is an essential tool for the library. Books are used when the library arranges and transports books. At present, most of the existing library book carts have only one bookshelf structure for placing books, and their functions are relatively single. The height of the book trolley is fixed. When the library managers put the books on the book trolley back to the bookshelves, they often need to bend down to pick up the books on the book trolley. The labor intensity is high and the work efficiency is reduced.

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