What did Lu Ban invent? What's the use?

Before Luban, carpenters only used axes and knives to level the wood used for construction, and the result was not only good, but also difficult and satisfactory. Later, through a long period of practice, Lu Ban found that the thinner the blade he used, the flatter the surface he made and the easier it was to dry. In this way, this kind of planer gradually evolved from Luban's practice, first with a thin axe blade, then with a blade fixed to a piece of wood and then across the handle, and finally with the blade fixed to the wooden trough-this is the planer we are familiar with today. Lu Ban's wife is also an inventor, who inspired her husband. When Luban planed the wood, she had to stand at one end of the wood and hold the rough thick plate. Because she has other obligations to do, it is not ideal to do such a thing, so she invented a wooden trough for the wood planing workbench to resist the impact pressure of Luban's wood planing, so that the wood planing can be done by one person. The wooden trough invented by her is called the wife of the class.

Mo Dou

Another very important tool invented by Lu Ban is the Mo Dou used by craftsmen (used to set up construction projects). This invention may be inspired by his mother. At that time, his mother was cutting and sewing clothes. Lu Ban watched all this and saw that she used a small powder bag and a thread to print out the desired cut shape first. Lu Ban transferred this practice to a Mo Dou, where he pinched both ends with a thread (soaked with Mo Dou) and put it on the material to be made to print the required lines. At first, Luban and his mother had to hold both ends of the thread. Later, his mother suggested that he make a small hook and tie it at one end of the line, thus freeing her from such chores and making it possible for her to do it alone. In memory of Luban's mother, craftsmen still call this Mo Dou Banmu.

ruler

Another symbol of Lu Ban's invention is that he can correctly draw a right-angled triangle, also known as a ruler, which can tell craftsmen which sizes are irregular and which ones are unlucky according to the rules of divination (geomantic omen). These rulers are still available in Hong Kong today. Saw attaches great importance to the invention of saw, Lu Ban. Or inspired by a blade of grass with a toothed edge cutting its finger, or seeing a cricket cut and eat food with its sharp teeth and leave. Anyway, most of them are described as follows. Luban and the craftsmen were asked to cut down a lot of wood. After cutting for several days in a row, they were exhausted and their axes were dull. At this time, Lu Ban suddenly cut his finger by a blade of grass, and he immediately thought: It must be a good way to make a tool to cut wood like this. He chose a piece of bamboo and cut a row of teeth on its edge with an axe. This new saw cuts the bark easily. When he saws the tree horizontally back and forth, the soft bamboo teeth are quickly polished. However, this proves the principle that saws can break wood. So Lu Ban put down his hand and went to the blacksmith to prepare an iron plate as hard and sharp as an axe, and then made it into a tooth shape. With this first saw blade made by hand, Lu Ban can cut wood accurately and effortlessly by using it on a wooden frame.

bolt

Another invention mark of Lu Ban is bolt. In ancient times, the bolt used by people was made into the shape of a fish and hung on the door. Needham pointed out that Luban replaced these bolts with keys shaped like rammers, which depends on the function of the exact matching parts. Lu Ban's skill can make such a device, and it is said that he also invented the "lock tumbler", which is still used in many locks. The symbols of other inventions of Lu Ban are drills, wedges, pulleys, shovels and stone mills for rice milling. The invention of the stone mill was when Lu Ban saw an old woman using a rammer and mortar with great effort. After much consideration, he made two thick stone pieces and cut them into columns, then made holes and hollows on their surfaces, one on top of the other, and put wheat and rice between them. When the columns on them turned, the powder (or flour) came out.

Umbrella

The invention was finally attributed to Lu Ban's wife. In ancient times, rainy days and hot summer troubled people, and people had to hide under small pavilions and could not go out. There is a legend that Lu Ban built many pavilions around his neighbors for everyone to use, but he still couldn't let people go out freely in the stormy season. Luban's wife then made a lightweight bamboo pavilion with oiled paper-an umbrella, of course, according to the style of the pavilion built by her husband. His wife said to Lu Ban, "The house you built can't be moved. My umbrella can take it around and provide protection in all seasons. "

besides, there are shovels, chisels and other tools.