Door device for crime prevention

Abstract

To secure crime prevention against an unexpected visitor etc., when an entrance door etc., of an apartment house, a detached house, etc., is opened / closed.SOLUTION: The present invention relates to a door device for crime prevention at a door of an entrance etc., and a bolt receiver 3 in a cylindrical shape etc., and a bolt rod 4 in a columnar shape etc. having one end formed into an L shape are attached inside an entrance door. When an entrance door 1 is opened with an end of an L-shaped part 5 of the bolt rod 4 having one end part formed into the L shape locked to an opening / closing-side opening frame 2 of the entrance door 1, the opening part between the entrance door 1 and the opening frame is held to a predetermined narrow width, and then the inside and outside of the entrance door 1 are partitioned off, thereby securing the safety in answering to an unexpected visitor etc.SELECTED DRAWING: Figure 1

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a security door device for entrance doors of apartment buildings, detached houses, and other buildings in the building field. [Background technology] In recent years, condominiums, detached houses, and other homes have been hit by visitors posing as delivery drivers or door-to-door salespeople. Once the door is opened, it becomes difficult to chase away the unexpected visitor, and sometimes even puts the home at risk of crime. For this reason, door scopes or television cameras on the front door have been used to check visitors, but these methods do not adequately provide a complete view of the visitor. Furthermore, using a door chain to open the door often results in a small opening, making it difficult to fully see the visitor, leading to the door being opened accidentally. Therefore, Japanese Patent Laid-Open Publication No. 2004-316228 proposes a security door device that connects a narrow auxiliary door to the inside of the door, so that when the door is opened, the auxiliary door acts as a partition and opens in a linked state. The auxiliary door is shaped like a lattice door, allowing the outside to be seen from the inside.

[0003] Problem to be Solved by the Invention

[0004] The aforementioned Japanese Patent Application Laid-Open No. 2004-316228 proposes a security system for preventing unexpected visitors from entering the building. However, when applied to existing entrance doors, the system has problems such as the door handle becoming an obstacle, and operation is complicated. The present invention aims to provide a simple and robust security door system that does not have these problems and drawbacks. Means to Solve the Problem

[0005] The present invention provides a system in which one end of a latch rod attached to the inside of an entrance door is formed into an L-shape. By opening the entrance door with the end of the L-shape engaged with the opening frame on the opening and closing side of the entrance door, the opening and closing of the entrance door can be stopped at a predetermined narrow width, thereby separating the inside and outside of the entrance door and ensuring security when dealing with unexpected visitors. The present invention provides a method for preventing the opening and closing of a front door by forming an L-shaped bar at one end of the latch attached to the inside of the front door, and by opening the front door with the end of the L-shaped part engaged in the opening frame on the opening side of the front door, the front door can be stopped at a predetermined narrow width, thereby separating the inside from the outside of the front door, ensuring security in dealing with unexpected visitors, etc. The present invention allows the visitor's appearance and voice to be easily and accurately confirmed, is easy to operate, and can be easily implemented on existing front doors. [Brief explanation of the drawings] [Figure 1] 1 is a perspective view of a security door device according to an embodiment of the present invention; [Figure 2] 1 is a perspective view showing a state in which a burglar-proof door device according to an embodiment of the present invention is used; [Figure 3] 1 is a perspective view showing a state in which a burglar-proof door device according to an embodiment of the present invention is used; [Explanation of symbols] 1. Entrance door 2. Opening frame 3···Bar holder 4···Bar bar 5···L-shaped part 6···Stopper DETAILED DESCRIPTION OF THE INVENTION The security door device of the present invention is a security door device for a door such as a front door, which has a cylindrical or other shaped bar rod 4 with one end formed in an L-shape that rotates within a cylindrical or other shaped bar receiver 3, as shown in Figure 1, and is attached to the inside of the front door together with the cylindrical or other shaped bar receiver 3. When the front door 1 is opened with the end of L-shaped portion 5 of bar rod 4, which has one end formed in an L-shape and is engaged with the opening frame 2 on the opening / closing side of the front door 1, as shown in Figure 2, the opening between the front door 1 and the opening frame 2 is stopped at a predetermined narrow width, as shown in Figure 3, thereby separating the inside and outside of the front door 1. By separating the inside and outside of the front door 1, security is ensured when dealing with unexpected visitors, etc. The stopper 6 in FIG. 1, the stopper 6 in FIG. 2, and the stopper 6 in FIG. 3 prevent the movement of the bar 4 when the security door device is in use and when it is not in use.

Claims

1. The door frame is fitted with a locking mechanism that locks the door to the inside of the door. The locking mechanism is attached to the inside of the door, and the locking mechanism is attached ...

2. The door lock is a safety feature that prevents the door from opening and closing when the door is closed.

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