Sorry. I don't have a solution. You can transfer them one at at time from the iPad, or download them one at a time from iCloud.com. The second is a bit more convenient, but only works if you use the iCloud Documents and Data (or iCloud Drive) feature with Pages.
I tried playing with the Workflow app, but could find no way to select multiple file
Now if you had a Mac instead of a PC, the new iCloud Drive feature shows in the Finder (file manager), so they could easily be selected and copied to a different, local, folder. There might be a similar feature for iCloud drive on Windows, but I haven't heard of it.