Connection means and lock mounting device with such connection means

A lock mounting device comprising a lock connection device, which is arranged to connect a first element with a second element mounted on both sides of a door leaf between which elements and in said door leaf a third element is mounted, wherein the lock connection device is arranged to connect the first element with the second element, the lock connection device comprising:

• a first screw means, which is provided with a threaded part intended to co-operate with a corresponding threaded part in a second screw means in order to provide an interconnection of the first element and the second element;
• an intermediate part provided with a first thread in a first end of the intermediate part, the first thread arranged to co-operate with the first screw means for the connection to said first element, wherein the intermediate part is connected to the second element by a second end of the intermediate part, and the intermediate part is provided with a third thread orientated perpendicular to said first thread, the third element being mounted to the third thread of the intermediate part by an element fixation means,
• wherein the first element is an inner plate, the second element is an outer plate, and the third element is a lock housing having a selvage,
• wherein the selvage is connected to the intermediate part of the lock connection device by the element fixation means, in order to fix the lock housing, selvage, inner plate, and outer plate to each other in the door leaf,
• wherein the element fixation means is connected perpendicular to and through the selvage to the third thread of the intermediate part, and
• wherein the element fixation means is formed as a threaded screw arranged to be screwed into the third thread of the intermediate part, the head of the screw being formed with a collar situated outside the selvage, the collar being arranged to engagingly co-operate with a security striking plate mounted in a doorframe, by the collar being arranged to be inserted through a slot in the security striking plate in order to prevent a removal of the selvage from the security striking plate when the collar is inserted in the slot.