Replace the blade on jigsaw Bosch # 1587 AVS item # 0 061 587 683

video here

How to Replace a Bosch Jigsaw Blade - YouTube

? 1:30
https://www.youtube.com/watch?v=YzpExustLD0
Sep 8, 2011 - Uploaded by toolsandmachinery
Mike will show you the simplicity of changing a blade with the Bosch twist-lock Jigsaw

here is the manual for the 1584

Bosch 1584VS Manuals

Here is the manualhttp://mdm.boschwebservices.com/MDMCache/English%20%5BUS%5D/t10/0000000/r00995v-1.pdf http://mdm.boschwebservices.com/MDMCache/English%20%5BUS%5D/t10/0000000/r00995v-1.pdf

Pull the black knob on the top front of the handle up and turn it clockwise to tighten and counterclockwise to loosen. I'd turn it counter clockwise at forst just to make sure it's loose enough to accept the blade when you start.

In most models at the blade shuck holder is a screw that thigh the blade,unscrew it and change your new balde .
Also Go to this LINK and find the part/diagram that can help you.

Please thumbs back if help is fine,thanks!.

try freemanuals.com on the web

I bought this saw and then wasted some time looking for "SDS" blades (which my manual called for) until I discovered that a T-shank blade was what was required. As far as the blade change goes, I had to practice changing the blade a few times before I figured out an easy way to do it. It's not so much that the top knob has to be pulled up hard, but it must be raised approximatley 10mm or 3/8". This knob will then either loosen (counterclockwise rotation) or tighten (clockwise rotation) the blade retaining mechanism. A good indication for me when the know was high enough was when I could see numbers exposed on the inner portion of the top knob (the neck) and could also see (when I looked under the top knob) that the top knob was now engaging the "teeth" on the small white phenolic gear. It is this gear that actually loosens or tightens the blade. The blade will loosen once the knob is turned counterclockwise (3 times), but the backside (smooth side) of the blade must be pulled away from the guide wheel as it is rotated 90 degrees. To install a blade, you you simply reverse this process. An audible click will be heard when tightening, but I would certainly always double-check to make sure the blade is tight, before operation. I almost ran the jigsaw with a loose blade the first time I put a blade in the saw. I hope this helps...

are you using the "T" shank blades and also are you loosening the spindle enough to allow the blade to turn, sometimes you have to push up a little to turn it and also pull away from the roller guide. Let me know and also there is a TINY spring in the top of the spindle that has a nasty habit of breaking and winding around itself not allowing proper operation.

http://mdm.boschwebservices.com/MDMCache/English%20[US]/t10/0000000/r00061v-1.pdf

This is the Owner's Manual for the Bosch 1587AVS Jigsaw.

It sounds like you need to replace the shaft.

There are two types of "quick release" mechanisms on the new Bosch jigsaws, the twist-top handle found on 1587 models, and the lower-lever found on the 1590's. 
The "twist-top" is the black cap on the 1587 at the front of the saw. You must first put the orbiting control ( on the side of the saw ) to position number III. This releases pressure on the blade. Then you lift the black cap, rotate three or more turns counter-clockwise ( as seen from the top ) to release the locking mechanism. If the saw blade is cool, you can carefully remove it with a single one-quarter turn using your fingers. If the blade is still hot from sawing, use a pair of pliers, but be gentle. Hot blades can bend easily and jam.
The 1590 models are quite a bit easier. You still want to put the orbit control to position III to release pressure. But the quick-release is a simple flick of the black switch on the front face of the saw. 
I still have my 30 year old Bosch with the screw-in blade holder. It still works and the saw still runs smooth as a sewing machine. If you are doing a lot of production work where you need to change blades frequently, the Bosch 1590 is the clear choice for quality and value. In thirty years of using Bosch tools, I have only had to do normal maintenance and had only one minor failure, which was the blade changing mechanism on the 1587 model. I broke it by tightening too far. SO, if you have a 1587 model, DO NOT OVER TIGHTEN. As it is, this non-warrantee repair only cost $16 bucks and took two days.
It should go without saying, but just to be safe I'll say it anyway... OBVIOUSLY, you should UNPLUG the tool when you are changing blades. Good luck!