It's Possible to reload the document through the Qlikview Server without Publisher.
Follow Below Steps:
Step1 : Open Qlikview Managment Console
Step2 : Goto Documents Tab, Choose the document and then right hand side you will find the Reload Tab.
Step2 : Goto That tab Schedule the Timings.
It is possible.
That's how the tasks have been triggered before QlikView Publisher was introduced.
Go to User Documents and after clicking on a particular qvw, you can see the options for Reload/Schedule on the right hand side.
In my view, security applied on the application rather than from publisher is more secured as the publisher distributed qvw document may not have security.