JP3130690U - Electromagnetic lock with security function - Google Patents

Abstract

There is provided an electromagnetic lock with a crime prevention function capable of preventing breakage caused by strong pulling of a door knob without risk of picking or cutting or breaking a locking member.
An electromagnet lock that is locked by being attracted and attracted by an electromagnetic force of an electromagnet, and the electromagnet body 3 holding the electromagnet 1 has a slightly projecting surface of the electromagnet 1 on the surface. The block 6 is screwed to the both ends of the back surface of the electromagnet main body by the screw 7 with the elastic washer 4 interposed therebetween, and the engaging groove 6a is formed in the block. The key 5a that engages with the engaging groove is provided in the case 5 so as to protrude inward, and the surface of the electromagnet main body 3 is exposed and accommodated. This is an electromagnet lock with a crime prevention function, which is constructed such that the elastic washer 4 is contracted to slightly move the electromagnet main body 3 and the slight movement is detected by a detection switch 9 to issue an alarm.
[Selection] Figure 1

Description

  The present invention relates to an electromagnetic lock with a crime prevention function that can prevent a door or knob from being destroyed without risk of unauthorized unlocking of a door lock (lock).

  Conventionally, a lock (lock) is generally a mechanical lock that locks and unlocks a locking member such as a dead bolt by inserting a key into a keyhole and operating a tumbler and turning it to rotate it. Instead, an electric lock that is unlocked by operating an actuator such as a motor or a solenoid by a radio wave, magnetism, a password, a fingerprint, or the like and advancing and retracting a locking member such as a dead bolt is also widespread. These conventional locks (locks) have a risk of being damaged by being unlocked by being picked from a keyhole, or by locking or breaking a locking member such as a dead bolt.

  In addition, in order to prevent unauthorized unlocking due to picking from the keyhole or cutting or breaking of the locking member such as dead bolt, locking is performed with a strong electromagnetic force by energization that does not require a locking member such as keyhole or deadbolt. An electromagnet locking device and a security door which have been made are also disclosed and publicly known. (For example, see Patent Document 1 and Patent Document 2.)

JP 2004-245041 A JP 2003-184370 A

However, the conventional electromagnetic locking devices and security doors described in Patent Document 1 and Patent Document 2 do not require a locking member such as a keyhole or dead bolt, and are illegally unlocked by picking or cutting or breaking the locking member. However, there is a problem that the door and the knob are destroyed due to excessive pulling of the door knob (handle) to try to open the door.
Therefore, the present invention prevents the door lock (lock) from being illegally unlocked due to picking or cutting or breaking of the locking member, and prevents the door knob from being strongly pulled and broken. It aims at providing the electromagnetic lock with a crime prevention function which can be performed, and makes it a subject to achieve this objective.

In order to achieve the above object, an electromagnetic lock with a crime prevention function is obtained by taking the following measures. That is,
(1) An electromagnet lock having a plate for attaching an electromagnet attached to a door opening wall of a building to the door, and the plate is adsorbed by an adsorption force due to electromagnetic force of the electromagnet to lock the door. The electromagnet body holding the electromagnet is attached with an elastic washer interposed, and the elastic washer is contracted by pulling the adsorbed plate to slightly move the electromagnet body, and the slight movement is detected. An electromagnetic lock with a crime prevention function, characterized by being configured to issue an alarm upon detection by a switch.
(2) The electromagnet body holding the electromagnet is formed in a thick strip-like shape embedded with the electromagnet surface slightly protruding on the surface, and blocks with elastic washers interposed at both ends of the back surface of the electromagnet body And an engagement groove is provided in the block, and the surface of the electromagnet body is exposed and accommodated in a U-shaped case in which a key that engages with the engagement groove is protruded inward. An electromagnet lock with a crime prevention function as described in (1) above.
(3) The previous item (2), wherein the electromagnet main body and the block screwed to the back surface of the electromagnet main body are screwed so as to be separated in a state where the compression pressure of the elastic washer is applied. ) Electromagnetic lock with crime prevention function as described.
(4) The crime prevention according to any one of the preceding items (1) to (3), wherein the elastic washer is formed by overlapping a plurality of washers formed in a dish shape with an elastic plate material. Electromagnetic lock with function.

  As described in the above means, the present invention has an electromagnet attached to a door opening wall of a building and a plate attached to the door, and the plate is adsorbed by an electromagnetic force of the electromagnet to lock the door. Because it is an electromagnetic lock designed to do so, locking members such as key holes and dead bolts are unnecessary, there is no risk of unauthorized unlocking due to picking or cutting or breaking of the locking member, and the adsorption force is also adsorbed at 600 kg to 3 t Since it is locked, it cannot be unlocked by pulling the door knob manually.

  The electromagnet main body holding the electromagnet is attached with an elastic washer interposed, and the elastic washer is contracted by pulling the adsorbed plate, and the electromagnet main body is pressed in a compressed state. Since it is configured to move slightly and detect the slight movement with a detection switch, an alarm is issued at the stage of trying to unlock the door by pulling the door knob strongly. This is effective in preventing the knob from being destroyed, and it is possible to prevent an alarm from being triggered when the knob is pulled in the normal opening and closing of the door.

  Furthermore, since the structure is not complicated and can be configured simply, it is effective to obtain a smart and inexpensive electromagnet lock.

  The best mode for carrying out the present invention will be described in detail with reference to the drawings in the following embodiments.

  FIG. 1 is a perspective view of an essential part cross section showing an embodiment of the present invention. As shown in the figure, the present invention has an electromagnet 1 attached to a door opening wall of a building and a plate 2 attached to the door, and the plate 2 is adsorbed by an electromagnetic force of the electromagnet 1 and locked. The electromagnet main body 3 holding the electromagnet is screwed by a screw 7 to a block 6 engaged and fixed by a key 5a in a U-shaped case 5 with an elastic washer 4 interposed therebetween. The elastic washer 4 is contracted by pulling the adsorbed plate 2 to move the electromagnet body 3 slightly, and the slight movement is detected by a detection switch 8 attached to the block 6. An alarm lamp 9 and a mounting plate 10 are attached to the case 5. In this embodiment, the electromagnet main body 3 holding the electromagnet 1 is screwed by a screw 7 to a block 6 engaged and fixed by a key 5a in a U-shaped case 5 with an elastic washer 4 interposed. However, the present invention is not limited to this, but is the best mode for carrying out the present invention.

2 and 3, the electromagnet body 3 holding the electromagnet 1 is formed in the shape of a thick strip with the flat surface of the electromagnet 1 protruding slightly on the surface, and is an elastic washer. 4, blocks 6 and 6 are attached to both ends of the back surface of the electromagnet main body 3 by screws 7 and 7. The blocks have the same width as the electromagnet main body 3 and engage grooves 6 a and 6 on both sides. 6a is formed, and the engaging groove is formed by the block 6 and the block laying plate 6A. However, the block 6 and the block laying plate 6A may be integrally processed.
The block 6 is provided with a screw hole 6b for mounting the detection switch 8 and wiring grooves 6c, 6c. The electromagnet body 3 has a push bolt 11 (see FIG. 1) for operating the detection switch. ) And a wiring groove 3b for energizing the electromagnet 1 are provided.

  As shown in FIG. 4, the case 5 is formed in a U shape in accordance with the width of the electromagnet main body 3, and keys 5 a and 5 a are projected on the inside, and the blocks 6 are formed on the projected keys 5 a and 5 a. , 6 is engaged with the engaging grooves 6a, 6a so that the surface of the electromagnet body 3 is exposed and accommodated in the case 5, and an electric control box is provided at one end. And a wiring board 12 and an alarm lamp 9 are detachably mounted. Further, holes 5c, 5c,... For countersunk screws 14, 14 for attaching the side plate 13 shown in FIG. 5 are attached to both ends of the case 5, and attachment for attaching the attachment plate 10 via the side plate 13. Holes 5d, 5d,... For the bolt 15 are drilled.

  The engaging grooves 6a and 6a of the blocks 6 and 6 attached to the case 5 having the above-described structure by screwing the screws 7 and 7 to both ends of the back surface of the electromagnet main body 3 shown in FIGS. Is engaged with the keys 5a and 5a projecting on the inside of the case 5, and the surface of the electromagnet main body 3 is exposed as shown in FIG. 1, and is slightly projected from the surface of the electromagnet main body 3. The plate 2 is attracted and locked by energizing the embedded electromagnet 1.

The case 5 in which the electromagnet main body 3 and the blocks 6 and 6 are accommodated as described above is attached to the door opening wall portion of the building via the attachment plate 10, and the plate 2 is attached to the inside of the door to the electromagnet 1. The plate 2 is attracted and locked by the energization of. Since this locking does not require a locking member such as a keyhole or dead bolt, no unauthorized unlocking is performed by picking or cutting or breaking the locking member. Trying to unlock it illegally.

  When the door knob is pulled strongly from the outside to try to unlock it illegally, the plate 2 attached to the inside of the door is pulled in the direction of the arrow as shown in FIG. 6, and at the same time, the plate and the electromagnet 1 are attracted and locked. The electromagnet body 3 in a state of being pulled is also pulled and moved, and the elastic washer 4 is contracted by the screw 7 screwed to the electromagnet body 3, so that a slight separation gap S is generated between the electromagnet body 3 and the block 6. Since the electromagnet main body 3 contracts in a state where the contraction pressure of the elastic washer 4 is applied, the separation gap S does not occur when the door is normally opened and closed. Accordingly, the detection switch 8 (shown in FIG. 1) does not operate and no alarm is issued. The elastic washer 4 is preferably formed by stacking a plurality of washer formed in the shape of a plate with an elastic plate material, but an elastic material such as synthetic rubber is used with a commercially available flat washer. A sandwiched sandwich or a commercially available spring washer may be used.

  The pusher bolt 11 screwed to the electromagnet main body 3 shown in FIG. 1 is placed in the normally open state by the separation gap S, and the operating lever of the detection switch 8 is in a normally open state, and an alarm is issued in the normally open state. It is like that. At first, the alarm lamp 9 flashes red at the same time as a strong alarm sound sounds for about 30 seconds, then the alarm lamp 9 switches to alternating flashing of red and green, resets and the alarm lamp 9 lights in green. However, the present invention is not limited to this.

  FIG. 7 shows an attachment example in which the present invention constructed as described above is attached to a door opening of a building. The case 5 in which the electromagnet main body 3 and the block 6 are accommodated is attached to a door opening wall portion via an attachment plate 10, and the plate 2 is attached to an inner side of a door 17 that is attached to be freely opened and closed by a hinge 16. Installation can be changed according to the shape of the door opening wall of the building. Further, the electromagnet 1 and the alarm lamp 9 are led from the power plug 18 through the control box 19 to the wiring board 12 (shown in FIG. 4) in the case 5 by the wiring cord and led from the wiring board 12 by wiring. It is not limited to this.

  The power plug 18 is plugged into an indoor power outlet so that electricity is always supplied, and measures are taken to automatically switch to an auxiliary battery or the like in the event of a power failure. The alarm lamp 9 is flashed and an alarm sound is generated by pulling it strongly for unlocking. Locking / unlocking and resetting are performed by remote control using a remote controller, a personal identification number, a card, a fingerprint, or the like.

It is a perspective view of an important section section showing an example of the present invention. It is the perspective view which screwed the block on the back surface of the electromagnet main body. It is AA sectional drawing of FIG. It is a perspective view of a case. It is principal part sectional drawing of a both-ends side part. It is sectional drawing of the state attracted | sucked strongly with the electromagnetic force of the electromagnet. It is drawing which shows the example of attachment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnet 2 Plate 3 Electromagnet main body 3a, 6b Screw hole 4 Elastic washer 5 Case 5a Key 5b Hole for wiring 5c, 5d Hole 6 Block 6A Block laying board 6a Engaging groove 3b, 6c groove 7 Screw 8 Detection switch 9 Alarm lamp 10 Mounting plate 11 Push bolt 12 Wiring board 13 Side plate 14 Countersunk screw 15 Mounting bolt 16 Hinge 17 Door 18 Power plug 19 Control box 20 Knob (handle)

Claims (4)

  An electromagnet lock having an electromagnet attached to a door opening wall of a building and a plate attached to the door, wherein the plate is adsorbed and locked by an electromagnetic force of the electromagnet, and holds the electromagnet The electromagnet body is attached with an elastic washer interposed, the elastic washer is contracted by pulling the adsorbed plate, the electromagnet body is moved slightly, and the slight movement is detected by a detection switch. An electromagnetic lock with a crime prevention function, characterized by being configured to issue an alarm.   The electromagnet body holding the electromagnet is formed into a thick strip-like shape with the electromagnet surface slightly protruding on the surface, and the block is screwed with elastic washers on both ends of the back surface of the electromagnet body. In addition, an engagement groove is provided in the block, and the surface of the electromagnet main body is exposed and accommodated in a U-shaped case having a key protruding to engage with the engagement groove. The electromagnetic lock with a crime prevention function according to claim 1.   The crime prevention according to claim 2, wherein the electromagnet main body and the block screwed to the back surface of the electromagnet main body are screwed so as to be separated in a state where the compression pressure of the elastic washer is applied. Electromagnetic lock with function.   The electromagnetic lock with a crime prevention function according to any one of claims 1 to 3, wherein the elastic washer is formed by laminating a plurality of washers formed in a dish shape with an elastic plate material. .

Images