Although no one in the tribe questioned Wang Tian's ability now, the two of them had been tinkering for a long time, and there was no way to break their heads, so they could only think about it in this regard.

In the end, the two of them really couldn't figure it out, so they called out the chief designer of the Son of Heaven to come forward to solve it.

After Wang Tian understood the problem between the two, he did not immediately tell them the solution, but asked rhetorically: "Have you noticed any difference in the door frame?" ”

Hearing the Son of Heaven say this, these two people, who had been staring at the door frame and the door leaf for an unknown number of times, once again looked at the door frame and played very seriously, 'Let's find fault'.

But looking left and right, looking up and down, but couldn't find anything special, the second brother and Liu Bei looked at each other, and finally decided to give up the rescue.

Liu Bei said boldly: "Son of Heaven, except that one side of the door frame is narrower than the other three, there is no other difference, and the door leaf made now is wider than the door frame, this can't be like the tribal gate, can the door leaf be installed into the door frame?" ”

Wang Tian smiled slightly, thinking that there was finally one person who understood among the two people, and he was worthy of being the leader of the carpenter he had chosen!

"Liu Bei, you see that you have observed very carefully, haven't you found out all these problems? As for the fact that the door leaf does not fit into the door frame, the question is, when did I say that the door of the room is also installed in the same way as the gate of the tribe? ”

After Wang Tian finished speaking, he stopped being verbose, asked the second brother to lift the door, stuck it into the door frame protruding on three sides, and then let him hold one hand from the side with the column to the other, and the door leaf was tightly stuck into the door frame.

The side with the cylindrical head corresponds to the narrower side of the door frame, and the whole door becomes a flat surface, and the protruding cylinders at both ends are stuck on the upper and lower door frames.

At this time, Wang Tian said again: "What about the two rabbit heads for each door?" ”

"Rabbit head, what rabbit head? Aren't those two like gates, are they handles? ”

The second brother and Liu Bei were puzzled, but still handed the two rabbit heads to the Son of Heaven.

"Liu Bei picked me up." With Wang Tian's height, he couldn't touch the upper edge of the door frame yet.

After Wang Tian was picked up, he took a rabbit head in his hand, stuck it on the cylinder at the position of the beam, and then said, "Do you understand?" One on the top and the bottom, so that the door leaf is fixed to the door frame. ”

After Liu Bei put him on the ground, he continued: "As for how to fix these two rabbit heads, you always have a way, right?" ”

After watching Wang Tian's operation, the two suddenly realized that it was very simple to install two rabbit heads:

Use your hand to drill 4 holes on the wooden board of the beam and the rabbit head, and then use the bamboo tenon to dip the fish maw glue into it, before that, the rabbit head and the door frame connection position, you can also brush the fish maw glue.

The problem is that the two of them have always thought that the two rabbit heads are the same as the handle on the tribe gate, and they have never thought of this method, which actually can't be blamed on the two, the two rabbit heads have a cylindrical hole in the middle, which is indeed very similar to the handle of the two doors.

"The groove of the cylinder on the rabbit head card door leaf only needs to be a little larger than the cylinder, when you install this size, each door must be adapted, too wide, the door gap will be very large, and the room will be filled with air in winter."

Wang Tian further explained.

In addition to one side of the hinge, the other three sides of the door are stuck in the inside of the door frame, in order to be able to seal and prevent the door from running outward, the door stop strip also needs to be fixed inside the door frame according to the method of installing the rabbit head after installing the door.

After installing the rabbit head, the door leaf has been fixed on the door frame, first install the door leaf and the door bolt on the door frame in the room, and bolt it, then a person stands outside the room, with the door frame strip made of cut thick bamboo pieces, push it from the outside to the inside, and use the door frame strip to tightly adhere to the door frame and the door leaf.

Another person can drill the mounting hole directly with a hand turn, drill the door stop directly through it, and drill it all the way to the door frame, and then use a stone hammer to hammer into the bamboo tenon glued with fish maw glue.

The bamboo tenon should be sharpened at one end is large and the other is small, the small end is knocked into the door frame, the large end is facing outward, and it is slightly larger than the hand drilled hole, so that the door stop can be firmly fixed on the door frame.

In this way, a circle of door stoppers is added between the door frame and the door leaf, which will play the role of blocking the door gap and fixing the door leaf, if there is a large gap, you can apply a layer of fish maw glue on the gap to seal.

There are a lot of fish bladders in the tribe now, and if they are only used as filling and sealing materials, they don't need to be too well-made, so there is no shortage of materials.

On the side of the door frame hinge, because the door leaf needs to rotate, there will inevitably be a gap between the rabbit head and the door leaf, at this time, you can paste a layer of animal skin with fish maw glue on the door frame on this side to fill the gap between the door leaf and the door frame.

In this way, the cold wind can be avoided from pouring into the gaps in winter, and the animal skins used can be used to cut the leftovers of the leather clothing, and only need to fill all the gaps, and do not need a complete whole strip, which is equivalent to the sealing strip on the door frame in later generations.

If the air leakage at the door stopper is still more serious, you can also paste a layer of animal skin treatment, so far, the whole door leaf is installed, and finally only need to add ground graphite powder as the lubricant of the door shaft in the two rabbit heads.

The simpler way is to add animal fat, but this thing will attract ants and other small insects, and as soon as the weather is hot, the oil will dissolve, flow everywhere, and it is difficult to clean up, so Wang Tian still chose graphite powder.

Graphite powder lubricant does not need to be applied immediately, let the door shaft and the rabbit head run in for a period of time and then add so that it can better make each other two workpieces cooperate, as the saying goes: "Running water does not rot, the hub does not beetle!" "After the break-in, the axle will also become stronger and more durable.

The flowing living water will not be rancid, and the often rotating door shaft will not be eroded by insects, and the often moving door shaft is not only not susceptible to the erosion of termite moths, but can remain unchanged for a long time.

And because of the continuous rotation and heating during use, the connection part between the door shaft and the rabbit head will be continuously carbonized and compacted, and the longer it is used, the stronger it will become.

When the run-in between each other is completed, graphite powder can be added, which can avoid the harsh friction sound, and the rotation will be more flexible and easy to use.

After Wang Tian pointed out the trick of installation, the second brother of Jingang and Liu Bei quickly installed a door.

Wang Tian pulled the door from the outside and buckled it in the door frame, before the fish maw glue was not dry, the door leaf could not be opened, after all, the bamboo tenon used to install the rabbit head has limited load-bearing capacity, before the rabbit head and the door frame are not connected into a whole, if the door leaf is opened and closed, it will cause loosening.

The two future Lu Ban were impressed by Wang Tian's ingenious design, and felt guilty for their doubts about the design of the Son of Heaven just now, but they would not know that such an installation method, in the present of later generations (such a description is a bit strange), will only be used to install firewood doors in the countryside.

In later generations, for this simple door, there are only these two installation methods, if you are not particular, the door leaf installed in this way can be removed from the door frame at any time when the valve is opened.

You only need to grasp the door leaf with both hands, and then lift it up, you can easily remove the door, as for whether it can be removed, it depends on the position of the two rabbit heads.

If the position of the rabbit head is not installed flat on the top of the door leaf, but away from a certain distance, as long as this distance is wider than the length of the door shaft below, you can install the rabbit head first, and then install the door leaf after the rabbit head is firmly connected.

To put it bluntly, it is the installation position of the two rabbit heads, to ensure that after the door leaf is lifted, the door shaft can be freely taken out or loaded from the two rabbit heads, as long as it does not affect the door seam.

Because of the presence of fences, these doors are equivalent to interior doors, and as long as the thickness of the beams above the door frame is sufficient, they can be installed in this way, so that one person can complete the installation of a door without the cooperation of another person.

Wang Tian also explained this method to the two of them, how to install it depends on the thickness of the door frame beam and whether they are happy or not, and Wang Tian does not interfere much.