scaling ladder
Ladder is an ancient war tool, used to climb over the city wall and attack the city.
Ancient ladders, some with wheels, can be opened, so they are also called? Ladder car? . They are equipped with protective plates, winches, grapples and other equipment, and some are also equipped with pulley lifting equipment.
Modern refers to a climbing tool, mainly used for fire fighting and emergency rescue.
Ladder is a kind of rock arrangement in the garden.
That is, outdoor stairs made of stone.
Application of modern ladder truck
In ancient times, people called bamboo ladders or wooden ladders used for aerial work ladders, which were cumbersome to use and had no safety guarantee.
Modern people use manganese steel and aluminum alloy instead of raw materials for making ladders through technical improvement. Scissor elevators and aluminum alloy lifting platforms produced by modern people are beautiful in appearance, convenient to move, quick to install and high in safety, and are good helpers for aerial work.
Modern ladder truck originated in Germany and is widely used in Korea, mainly for moving. The ladder truck has a history of more than 30 years.
The production experience of China in the first decade from industrialization to 2 1 century is zero.
During the period, there were sporadic ladder trucks, and the number was very small, all of which were imported from South Korea. The use of ladders in South Korea is relatively simple, which cannot meet the needs of China people and is extremely difficult to sell after sale.
It was not until 20 12 that the national patent announced the successful development of a new type of ladder, a convenient ladder truck hopper and a ladder truck.
The ladder truck is a special working truck that transports materials upstairs with vehicle-mounted ladder equipment. It has the characteristics of simple operation, strong flexibility, wide application range, high working efficiency and good performance.
The ladder truck is also called ladder truck, aerial work truck and ladder truck.
This car is mainly used for project leasing, curtain wall construction, roof waterproofing, solar energy installation, advertising anti-aircraft guns, power maintenance, air conditioning installation, moving company, cement and gravel handling, ship maintenance, road and bridge maintenance, etc.
In ancient times, when attacking a city and building a ladder, could the defenders directly push down the ladder?
There were no roads and railways in ancient times, and it was impossible to transport the built siege vehicles to the battlefield. Different walls have different heights, so siege vehicles should now be built behind Enemy at the Gates's enemies. It takes time. It takes three months to build a car or something. In these three months, the army has to eat, and the effective forces in the army are locked up here, unable to perform other strategic tasks, and the intangible cost is unprecedented.
Generally, siege ladders have bases. After the ladder is erected, there is a fixing device on the base to prevent the defenders from pushing down the ladder. Baffles also extend from both sides of the base to protect the soldiers who advance with the siege ladder. So watch the scene in the film and television drama where they rush up with ladders on their shoulders, that is, just go up and die. Think of it as a joke. After all, it is very expensive for the prop group to make a complete siege ladder!
In this case, it is better to climb the wall directly, that is, let the cannon fodder climb the wall with a simple ladder. For example, when the Liao army attacked the city, they let the Xi people go first. They are a famous nation conquered by the Khitan. He pushed down when the defender pushed down. I mean the ladder. Anyway, all these people are dead, which saves the possibility of rebellion. Even if you can't break the enemy city, it is good to consume your opponent's bow and arrow and physical strength.
The tactics of the ladder are not one-on-one, otherwise it will be easily destroyed by the enemy. It is necessary to assemble a large number of ladders outside the range of arrow stone attack, and then the artillery will attack the city wall first. After reducing the enemy's defense, the ladder troops will eventually charge, thus minimizing the casualties of the siege troops.
Then two songs.
So the siege general decided to use a ladder as a ladder and put it on the puddle first. After the troops passed by, barbs were placed at the upper end of the ladder, erected on the edge of the city wall and hung up to prevent the soldiers guarding the city from falling when pushing the ladder. And if someone is climbing a ladder, the people below me will help them hold it, so the most important thing is to prevent people on the wall from shooting arrows and throwing stones, so the soldiers who besieged the city launched a counterattack and threw fireballs and other flammable items on it.
Summary: There are rollers under this ladder, so the ladder can move freely, so it is also called? Ladder car? But also equipped with shields, winches, grapples and even pulley lifting equipment, so that the ladder can not only take soldiers from the foot of the city wall. During transportation, you can also transport some heavy tools and weapons. So this well-made ladder is difficult to be pushed down.