Before Luban, carpenters only used axes and knives to level their building wood, and the result was not only good, but also difficult and satisfactory. Later, through long-term practice, Lu Ban found that the thinner the blade he used, the smoother the surface he made, and the easier it was to dry. In this way, this kind of plane gradually evolved from Luban's practice, first with a fine axe blade, then with the blade fixed on a piece of wood and then across the handle, and finally with the blade fixed on the wooden trough-this is the plane we are familiar with today. Lu Ban's wife is also an inventor, and she inspired her husband. When Lu Ban planed the wood, she would stand at one end of the wood and hold a 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 of the wooden plane workbench to resist the impact pressure of Luban's wooden plane, so that the wooden plane can be completed by one person. The wooden trough she invented is called the wife of the class.
Magic bean
Another very important tool invented by Lu Ban is the Mo Dou used by craftsmen (used to set up construction projects), which may be inspired by his mother. At that time, his mother was cutting and sewing clothes. Looking at all this, Lu Ban saw that she used a small powder bag and a thread to print out the desired cutting shape first. Lu Ban transferred this practice to Amodou. He pinched both ends with a thread (soaked in Mo Dou) and placed it on the material to be printed with the required lines. At first, Lu Ban and his mother had to grab both ends of the line. 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 it Mo Dou Banmu.
pond
Another sign of Lu Ban's invention is that he can correctly draw a right triangle, also called a class ruler, and 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. Lu Ban attached great importance to the invention of the saw. Or inspiration comes from a blade of grass with a toothed blade that cuts a finger, or seeing a cricket cut and eat food with its sharp teeth and leave. Anyway, most of them are described like this. Luban and craftsmen were asked to cut down a lot of wood. After chopping for several days, they were exhausted and their axes were dull. At this time, Lu Ban suddenly cut his finger by a blade of grass. He immediately thought: It must be a good way to make a tool for cutting wood. He chose a bamboo and cut a row of teeth on its edge with an axe. This new saw cuts bark easily. When he sawed the tree horizontally back and forth, the soft bamboo teeth were quickly polished. However, this proves the principle that a saw can cut 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-hand saw blade, Luban can use it to cut wood accurately and effortlessly on the wooden frame.
plug
Another sign invented by Lu Ban is the bolt. In ancient times, the latch 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 a key shaped like a rammer, depending on the function of accurately matching parts. Luban's skill can make such a device. It is said that he also invented the "lock tumbler", and many locks are still in use. The symbols of Lu Ban's other inventions 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 strength. After careful consideration, he made two thick stones, cut them into cylinders, and then dug holes and pits on their surfaces, one above the other, and put wheat and rice between them. When the pillars above them turn, powder (or flour) comes out.
umbrella
The invention was finally attributed to Luban's wife. In ancient times, rainy days and hot summers plagued people, and people had to hide under small pavilions and could not go out. There is a legend that Luban built many pavilions around his neighbors for everyone to use, but he still couldn't let people in and out freely in the stormy season. Lu Ban's wife made a lightweight bamboo pavilion out of oiled paper-an umbrella, of course, according to the style of her husband's pavilion. His wife said to Lu Ban, "The house you built can't be moved. My umbrella can be taken with me and can provide protection all year round. "
In addition, there are tools such as shovels and chisels.