Answer:
Benjamin Franklin
The person who is too weak to sign the constitution and had to be carried is Benjamin Franklin.
The constitution was officially signed on the 17th day of September 1787 and during that time Benjamin Franklin is 81 years of age. In fact, he is the oldest one among all of the delegates.
Benjamin Franklin prepared a speech for the Convention but since he was very weak, instead he let his co-delegate to read it.
