TECHNICAL FIELD

The invention relates to a lock which is developed for preventing the doors from opening by force especially in case of burglary in outward-opening fire doors, security doors and similar doors.

STATE OF THE ART

Generally the outward-opening doors are fire doors. The locking mechanisms of the fire doors are designed as easy unlockable assemblies with a single bolt so as to open the doors easily in case of fire. The present locking mechanisms provides easy evacuation in case of fire. However these allow external opening of the doors easily by malicious people. Therefore an additional padlock or panel lock is also used even though it is prohibited by regulations and it is dangerous. This situation also prevents the evacuation in dangerous situations such as fire and earthquake and causes loss of life.

Today, the safety hook designed for inward-opening doors is already available. These safety hooks, which prevent the closed door from being opened by prizing and stretching from outside with a crowbar or similar objects, are designed for inward-opening doors. However this product cannot be used for outward-opening doors. The invention is designed especially for outwardopening doors.

DESCRIPTION OF THE INVENTION

The present invention relates to a safety hook which is developed for eliminating the above-mentioned drawbacks and providing new advantages to the related technical field. The object of the invention is to prevent all of the outward-opening doors (fire doors, security doors, etc.) from opening by force. It is applicable for all kind of doors due to its special easy mountable design. No matter how much force is applied to the door, it does not allow the door and the door trim to stretch at the slightest.

In the invention, the hook fits vertically between the door trim and the hook slot which is mounted on the door trim when the door is closed. This mechanism does not prevent the door from opening normally, and does not allow the door and the door trim to move away from each other when the door is forced from the outside by prizing. No matter how much force is applied, it is not possible to flex the hook since the hook is between the door trim and the hook slot during prizing.

The other object of the invention is to prevent the door and the door trim from stretching and squeezing in the event of earthquakes and collapse. Thus the door can be opened by an intervention from inside.

Figures

The embodiments of the present invention, briefly summarized above and discussed in detail below, can be understood by reference to the exemplary embodiments of the invention described in the accompanying drawings. However it should be noted that the accompanying drawings merely illustrate typical embodiments of the present invention and is not intended to limit its scope, since the invention may therefore allow other equally effective embodiments.

Figure 1 is the plan and perspective view of the hook body of the invention. Figure 2 is the rear and perspective view of the slot body of the invention. Figure 3 is the rear perspective views of the slot body and the hook body of the invention.

Figure 4 is the combined perspective view of the hook body and the slot body of the invention.

Figure 5 is the combined rear and perspective view of the hook body and the slot body of the invention.

Identical reference numbers are used, where possible, in order to facilitate understanding and to identify identical elements that are common in the figures. The figures are not drawn to scale and can be simplified for clarity. It is contemplated that the elements and features of an application may be usefully incorporated into other applications without further explanation.

Description of the Details in Figures

The equivalents of the reference numbers shown in the figures are given below.

1- Hook body

2- Hook

3- Fastening holes

4- Slot body

5- Hook slot

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the preferred alternatives of the safety hook mechanism of the invention are described so as to provide a better understanding of the subject and to cause no limiting effect.

The invention is characterized in that the one-piece hook body (1) which is a hook (2) of Figure 1 bent with an angle 90°is interlocked with the one-piece hook body (5) of Figure 2, on the rear side of which there is a hook slot (5) into which the hook (1 ) is inserted.

In figure 1 , it is shown a hook body whose hook (2) section is bent and which is made of preferably rigid and durable metal and on which the fastening holes (3) are located for fastening it on the door. The hook body (1 ) is inserted by screwing into the inside of the door through the fastening holes (3) so that the hook (2) is parallel to the door trim. In figure 2, it is shown a slot body (4), on the rear side of which a hook slot (5) is formed by forming a camber into which the hook (2) is inserted, and on which the fastening holes (3) are located and which is made of preferably rigid and durable metal. The slot body (4) is fastened by screwing through the fastening holes (3) and aligned so that the hook (2) of the hook body (1 ) fastened on the door is inserted into the hook slot (5) when the door is closed.

As is seen in Figure 4 and Figure 5, the invention is locked by the hook (2) which is inserted into the hook slot (5) as soon as the door is closed and prevents the door from opening by stretching during an external intervention.

In the invention, the hook (2) fits vertically between the door trim and the hook slot (5) on the slot body (4) which is mounted on the door trim when the door is closed. This mechanism does not prevent the door from opening normally, and does not allow the door and the door trim to move away from each other when the door is forced from the outside by prizing. No matter how much force is applied, it is not possible to open the door externally by stretching the hook (2) since the hook (2) is between the door trim and the hook slot (5) during prizing.