JPH0659949U - Building intrusion prevention device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a building intrusion prevention device that can prevent people who leave the building from entering the building by mistake while passing through the door. [Configuration] First door and second door, human body detectors 1 and 2 respectively provided inside the first door and between the first door and the second door, and human body detection inside the respective doors An intrusion prevention device for a building, comprising door opening / closing control means 4 and 5 for opening the door when only the container detects a person.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a building intrusion prevention device that allows only a specific person such as a resident or a person authorized in advance to enter and leave.

[0002]

[Prior art]

 Conventionally, as a device of this type, as described in Japanese Patent Application Laid-Open No. 2-120683, doors are doubled and a passage control room is provided between these doors, and a card reader is installed here. A switch is provided on each of the inside of the first door and the outside of the second door, and when the entrance switch is pressed, the front door is opened, the back door is locked, and the passerby possesses it. A passerby management device has been proposed in which the card reader opens the back door after the card reader has read the data on the identification card.

[0003]

[Problems to be solved by the device]

 However, although the above-mentioned conventional device has double doors, a third party enters the traffic control room from the opposite direction when a passerby exiting the traffic control room passes through the door. It is possible and not meant to prevent this. Therefore, even if the above-mentioned conventional device is applied to a building in which only a specific person can enter and exit, it cannot prevent the entry of a person who is not allowed to enter or exit.

An object of the present invention is to provide a building intrusion prevention device that can prevent a person who leaves the building from entering the building by mistake when passing through the door.

[0005]

[Means for Solving the Problems]

 In the building intrusion prevention device that prevents people who are not allowed to enter the building from entering the building in the wrong way, the first and second doors provided inside and outside the building The human body detector inside the door, between the first and second doors, and the human body detector inside each door opens the door when only the human body detector detects the person. And a control means.

[0006]

[Action]

 As mentioned above, the door can be opened when there is a person only inside the door, and when there is a person outside the door, that is, when there is a person trying to enter the building, the door is opened. Since there is no state, it is possible to prevent people from entering the building while they are passing through the door.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a control circuit diagram showing an embodiment of a building intrusion prevention device of the present invention, and FIG. 2 is a plan view of a building entrance / exit.

In the figure, 10 is a first door installed at the doorway of a building, 11 is a second door installed outside the first door, and 1 is a ceiling inside the first door 10. The first human body detector provided, 2 is the second human body detector provided on the ceiling between the first door 10 and the second door 11, and 3 is the outside of the second door 11. A third human body detector provided on the ceiling, 4 is a relay for opening the first door 10 for issuing an opening command for the first door 10, and 5 is for opening a second door for issuing an opening command for the second door 11. A relay, 6a is a normally open contact of the closed door detection switch that detects that the first door 10 is closed, 7a is a normally open contact of a closed door detection switch that detects that the second door 11 is closed, and 1a is When the first human body detector 1 detects a person, the normally-open contact 2a indicates that the second human body detector 2 detects a person. A normally-closed contact that is closed, 2b is a normally-closed contact that is opened when the second human body detector 2 detects a person, and 3b is a normally-closed contact that is opened when the third human body detector 3 detects a person. The first door opening command relay 4, the normally-closed contact 2b, the normally-open contact 1a, and the normally-open contact 7a are connected in series with each other, and are interposed between the power sources P and N, and the second door opening relay 5, The closed contact 3b and the normally open contact 2a are connected in series with each other and are interposed between the power supplies P and N.

Next, the operation will be described. When both doors 10 and 11 are closed and the person is not present between the first door 10 and the second door 11 and outside the second door 11, the person approaching the building approaches the first door 10. In this case, none of the human body detectors 1, 2 and 3 has detected a person, and since both doors 10 and 11 are closed, the normally open contact 7a and the normally closed contact 2b are closed. In this state, when the person who arrives near the first door 10 reaches the vicinity of the first door 10, the first human body detector 1 detects this and closes the normally open contact 1a, and P-7a-1a-4-N is a closed circuit. Next, the first door opening relay 4 is energized, a door opening command is issued to a separately provided automatic opening / closing device (not shown) for the first door 10, and the first door 10 is opened. When the person passing by passes through the part of the first door 10, the first door 10 is closed, and when it reaches between the first door 10 and the second door 11, the second human body detector 2 detects it. Since the normally open contact 2a is detected and closed, P-6a-2a-3b-5-N becomes a closed circuit, the second door opening command relay 5 is energized, and the second door 11 is opened. When a person who arrives between the first door 10 and the second door 11 arrives, and if a third person is outside the second door 11, the third human body detector 3 Detects a third party and its normally-closed contact 3b is open, so P-6a-2a-3b-5-N does not become a closed circuit, and the second door opening relay 5 is energized. The second door 11 is not opened. Further, when there is a person who exits the building or a third party who is not allowed to enter the area between the first door 10 and the second door 11, the normally closed contact 2b of the second human body detector 2 is closed. Therefore, even if another person approaches the first door 10 and closes the normally open contact 1a of the first human body detector 1, the closed circuit of P-7a-1a-2b-4-N does not occur. The first door opening relay 4 is not energized, and the first door 10 does not open. Therefore, even if there is a third party between the first door 10 and the second door 11, it is not possible to enter the hall.

In the above embodiment, the case where the first and second doors are automatic doors and the first to third human body detectors are provided has been described, but similar effects can be obtained even in the following modes. . (1) The first and second doors 10 and 11 are manual doors equipped with an automatic lock, and the first and second door opening command relays issue an unlock command to the automatic lock. ing. (2) There are two human body detectors, which are installed inside the first door 10 and between the first door 10 and the second door 11, respectively. (3) The number of human body detectors and installation positions are as shown in (2), and the first and second doors have the same structure as described in (1).

[0012]

[Effect of device]

 As described above, according to the present invention, when a person is inside the door only, the door can be opened, and when there is a person outside the door, that is, there is a person trying to enter the building. At that time, the door cannot be opened, so that it is possible to prevent a third person from entering the wrong place while the person exiting the building is passing through the door.

[Brief description of drawings]

FIG. 1 is a control circuit diagram showing an embodiment of a building intrusion prevention device of the present invention.

FIG. 2 is a plan view of a building entrance / exit.

[Explanation of symbols]

 1 1st human body detector 2 2nd human body detector 3 3rd human body detector 4 1st door opening relay 5 2nd door opening relay 10 1st door 11 2nd door

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A building intrusion prevention device for preventing a person who is not allowed to enter the building from entering the building in a wrong manner, the first door and the second door provided inside and outside the building, and A human body detector inside the first door, between the first door and the second door, and a door for opening the door when only the human body detector inside each door detects a person A building intrusion prevention device, comprising: an opening / closing control means.