JP7631048B2 - Doorknob built-in alarm device - Google Patents

Description

An embodiment of the present invention relates to an alarm device built into a doorknob.

Generally, at a building or construction site, various types of work are carried out in any location, both indoors and outdoors, including assembling structures, installing electrical, gas and water facilities, and interior construction.

There are doors for various purposes on construction sites, such as doors leading to adjacent rooms and doors leading to the outdoors, but if work needs to be done in close proximity to a door, care must be taken to prevent other workers from opening and closing the door.

For example, if there is an opening in the floor just beyond the door for loading and unloading equipment, or if work is being done using a stepladder or elevated work platform just in front of the door, opening the door could put workers just beyond the door in danger.

A door alarm device has been developed that can detect and warn of unauthorized door opening by utilizing the gap between the door and the door frame, and can also detect and warn of unauthorized unlocking of the door lock (see, for example, Patent Document 1).

A door unlock alarm device has been developed in which a circuit that detects the rotation angle of the thumb turn and sounds an alarm is built into an alarm case that fits into the doorknob, and which sounds an alarm when an illegal attempt is made to unlock the door from outside (see, for example, Patent Document 2).

JP 2005-120653 A JP 2002-327561 A

Conventional door alarm devices and door unlock alarm devices are both attached to the outside of a door or doorknob, and detect and sound an alarm when a door is opened or unlocked illegally. For example, a magnetic switch type door alarm device sounds an alarm only after the door is opened, which may shorten the time it takes for workers near the door to recognize the danger. In addition, a contact sensor type door alarm device may not be able to detect opening and closing properly at construction sites where workers wear protective gear such as gloves. On the other hand, a proximity sensor type door alarm device may sound an alarm excessively at doors with a large number of people entering and exiting.

The problem that this invention aims to solve is to provide a doorknob-mounted alarm device that can sound an alarm in response to only the rotation of the doorknob, without being attached to the outside of the door or doorknob.

The doorknob built-in alarm device of the embodiment is
A front plate attached to the end surface of the opening side of the door;
a device case provided on the rear side of the front plate and having a space through which a core member that rotates in response to rotation of the doorknob passes;
a latch bolt adjustment mechanism provided inside the device case and configured to cause a latch bolt to protrude or retract from the front plate in response to rotation of the core member;
an alarm device provided inside the device case and configured to output an alarm sound in response to a power supply;
a power supply unit provided inside the device case and configured to supply power to the alarm device via a power supply line;
a switch mechanism that turns on the power supply line in response to the movement of the core member in a direction in which the latch bolt is embedded in the front plate in response to the rotation of the doorknob, and cuts off the power supply line in response to the movement of the core member in a direction in which the latch bolt is protruding from the front plate ,
The core member is a square core that is attached across a pair of the doorknobs that are attached to one surface and the other surface of the door,
The latch bolt adjustment mechanism includes a rotating part having a square core hole into which the square core is inserted,
The switch mechanism connects the power supply line in response to rotation of the pivot part in a direction that causes the latch bolt to be embedded in the front plate in response to rotation of the doorknob, and cuts off the power supply line in response to rotation of the pivot part in a direction that causes the latch bolt to protrude from the front plate .

1 is an exploded perspective view showing a configuration in the vicinity of a doorknob of a door 1 in which a doorknob-embedded alarm device 10 according to an embodiment is incorporated; 1 is a perspective view showing an internal mechanism of the doorknob-embedded alarm device 10 when the doorknob is not turned (when the door 1 is capable of being closed). FIG. 1 is a perspective view showing an internal mechanism of the doorknob-embedded alarm device 10 when the doorknob is turned (when the door 1 is in a state in which it can be opened). FIG.

The doorknob-mounted alarm device of the embodiment will be described below with reference to the drawings.

Figure 1 is an exploded perspective view showing the configuration of the area around the doorknob of a door 1 incorporating an embodiment of a doorknob-integrated alarm device 10.

The doorknob-embedded alarm device 10 is used by installing the device case 11 and its front plate 12 of the doorknob-embedded alarm device 10 in place of the main body case and its front plate (not shown) of the door already installed in the door 1.

As shown in Figure 1, after removing the main body case (not shown) of the doorknob already installed on the door 1, the device case 11 of the doorknob-integrated alarm device 10 is installed in the door 1, and the top and bottom of the front plate 12 are attached to the open end face 1F of the door 1 with device case mounting screws 13a and 13b.

From the outside of the door 1, the square core 32 (core member) of the outer door knob 31 is inserted through the square core hole 17h of the rotating part 17 exposed on the first side (lid) 11a of the device case 11 via the outer round seat 33.

The round seat mounting plate 36 is attached to the inside of the door 1 with round seat mounting screws 36a and 36b, with the square core 32 that passes through the device case 11 and protrudes from the inside of the door 1 at the center, and the tip of the square core 32 is fitted into the square core hole 34h of the inner door knob 34 via the inner round seat 35, and fixed with screws (not shown).

This allows the doorknob-embedded alarm device 10 to be easily installed in the door 1, replacing the doorknob body case (not shown) already installed in the door 1.

First, the doorknob-integrated alarm device 10 has a normal doorknob function (latch bolt adjustment mechanism). The normal doorknob function includes a function that, when the doorknobs 31, 34 are rotated in the direction indicated by the arrow y, causes the latch bolt 14 to sink into the front plate 12 in the direction indicated by the arrow B, making the door 1 openable, and a function that, when the hand is released from the doorknobs 31, 34, causes the spring force of the built-in latch bolt adjustment spring 19 (see FIG. 2) to cause the latch bolt 14 to protrude from the front plate 12 in the direction indicated by the arrow A, and causes the doorknobs 31, 34 to return to their original position in the direction indicated by the arrow x, making the door 1 closeable.

The deadbolt 15 on the front plate 12 has the same function as a normal doorknob, protruding from or sinking into the front plate 12 depending on the locking/unlocking operation of a key (not shown), but a description of the mechanism for locking/unlocking using the deadbolt 15 will be omitted.

In addition to the normal doorknob functions, the doorknob-embedded alarm device 10 also has at least the following door opening operation alarm functions:

The door opening operation warning function is a function that, when the latch bolt 14 is embedded in the front plate 12 by rotating the doorknobs 31, 34 in the direction indicated by the arrow y, making the door 1 openable, outputs a warning sound ES (see Figure 3) from the warning unit (speaker) 16S, which is provided on the back side of the front plate 12 with multiple sound holes exposed, to warn workers in the vicinity of the door 1 that the door 1 is about to be opened.

Figure 2 is a perspective view showing the internal mechanism of the doorknob-integrated alarm device 10 when the doorknob is not turned (when the door 1 can be closed).

Figure 3 is a perspective view showing the internal mechanism of the doorknob-integrated alarm device 10 when the doorknob is turned (when the door 1 is in a state where it can be opened).

In Figures 2 and 3, the second side 11b facing the first side (lid) 11a of the device case 11 shown in Figure 1 is described as the bottom surface of the device case 11, and the third side 11c facing the front plate 12 is described as the rear surface of the device case 11.

The latch bolt 14, which protrudes from or is embedded in the front plate 12 in the space below the device case 11, is supported by one end of a rod-shaped support core 18 that is positioned from the third side surface (rear surface) 11c of the device case 11 toward the front plate 12.

The support core 18 is biased in the direction indicated by arrow A by the spring force of the latch bolt adjustment spring 19 (not directly visible in the illustration due to the casing) interposed between the third side surface (rear surface) 11c of the device case 11 and the other end of the support core 18, when no external force is being applied to the rotating part 17 or the latch bolt 14, causing the latch bolt 14 to protrude from the front plate 12.

At this time, the rotating part 17 is biased in the direction indicated by the arrow x1 via a gear mechanism (not shown) provided between the rotating part 17 and the support core 18.

On the other hand, when a force is applied by abutting a door frame (not shown) or the like against the inclined surface of the latch bolt 14, the latch bolt 14 slides in the direction indicated by arrow B against the spring force of the latch bolt adjustment spring 19, depending on how the force is applied, and becomes embedded in the front plate 12.

As a result, when the door 1 is closed, the latch bolt 14 fits into the latch hole in the door frame (not shown) and remains in that position.

In addition, the support core 18 slides in the direction indicated by the arrow B against the spring force of the latch bolt adjustment spring 19 in conjunction with the rotation of the rotating part 17 in the direction indicated by the arrow y1, which accompanies the rotation of the outer door knob 31 or the inner door knob 34 (see FIG. 1) in the direction indicated by the arrow y, via a gear mechanism (not shown) provided between the support core 18 and the rotating part 17, and causes the latch bolt 14 to sink into the front plate 12.

As a result, even when the door 1 is closed, the latch bolt 14 can be pulled out of the latch hole in the door frame (not shown), allowing the door 1 to be opened.

The rotating part 17 is also provided with a rotating protrusion 17P that is integral with the peripheral part on the side facing the upper space of the device case 11, extends outward from the rotation center of the rotating part 17 (the central axis of the square core hole 17h) and rotates (arrow x2 or y2) together with the rotation of the rotating part 17 (arrow x1 or y1).

A momentary switch 20 is provided in the space above the device case 11, corresponding to the position reached by the tip of the pivot protrusion 17P as it rotates in the direction indicated by the arrow y2 in response to the rotation of the outer door knob 31 or the inner door knob 34 (see FIG. 1) in the direction indicated by the arrow y.

In the embodiment, the momentary switch 20 is attached to the second side surface (bottom surface) 11b of the device case 11. The momentary switch 20 is attached so that, in response to a rotation operation of the outer door knob 31 or the inner door knob 34 (see FIG. 1) in the direction indicated by the arrow y, as shown in FIG. 3, the tip of the rotating protrusion 17P rotates in the direction indicated by the arrow y2 to a position where it reaches, and the tip of the rotating protrusion 17P abuts and turns the switch ON, and as shown in FIG. 2, when the tip of the rotating protrusion 17P rotates back in the direction indicated by the arrow x2, the switch turns OFF <switch mechanism>.

An alarm device 16 is also provided in the space above the device case 11. In this embodiment, the alarm device 16 is a device that generates a loud beep (electronic sound) and is attached to the back side of the front plate 12. When the momentary switch 20 is turned ON, the alarm device 16 is driven by the battery power source of the power supply unit 21, and outputs an alarm sound ES from the alarm unit (speaker) 16S.

The power supply unit 21 is attached to the third side surface (rear surface) 11c of the device case 11 and is configured to allow the battery to be replaced. The voltage supply lines (+) 22a, 22b and voltage supply line (-) 22c from the power supply unit 21 are connected to the power supply terminal (not shown) of the alarm device 16 via a momentary switch 20, which is conductive when the switch 20 is ON and cut off when the switch 20 is OFF.

Next, we will explain the operation of the doorknob-embedded alarm device 10 of this embodiment when it is installed in a door 1.

Here, we assume that the alarm device 10 is built into the doorknob of door 1 at a construction site where some kind of construction work, such as electrical equipment work, is being carried out. We also assume that worker A is working directly in front of the outside of door 1 while door 1 is closed.

When the door 1 is closed in the doorknob-integrated alarm device 10, as shown in FIG. 2, the support core 18 of the latch bolt 14 is biased in the direction indicated by arrow A by the spring force of the latch bolt adjustment spring 19, and the latch bolt 14 protrudes from the front plate 12, thereby maintaining the door 1 in a closed state.

At this time, the pivot part 17 is biased in the direction indicated by the arrow x1 by the latch bolt adjustment spring 19 via a gear mechanism (not shown) provided between the pivot part 17 and the support core 18, and the pivot protrusion 17P is also biased in the direction indicated by the arrow x2, so that the momentary switch 20 is maintained in the OFF state.

For example, when worker B, who is on the inside of door 1 and separate from worker A who is working just in front of the outside of door 1, rotates the inside doorknob 34 in the direction indicated by arrow y to open door 1 for work purposes, the rotating part 17 of the doorknob-integrated alarm device 10 is rotated in the direction indicated by arrow y1 via the square core 32 as shown in FIG. 3, and the rotating protrusion 17P of the rotating part 17 presses the momentary switch 20 as indicated by arrow y2.

Then, the momentary switch 20 turns ON, the power supply lines (+) 22a, 22b from the power supply unit 21 become conductive, and power is supplied to the alarm issuing device 16. The alarm issuing device 16 then outputs an alarm sound (e.g., "beep!!") ES from the alarm issuing unit (speaker) 16S to warn that the door 1 is about to be opened.

This allows worker A, who is working directly in front of door 1, to know that door 1 is about to be opened by another worker B before door 1 is actually opened, and he or she can take action to avoid danger, such as leaving the area where door 1 is open or knocking on door 1 to let worker B know that he or she is working directly in front of door 1.

Therefore, according to the embodiment, it is possible to provide a doorknob-integrated alarm device 10 that is capable of sounding an alarm in response to only the operation of opening the door 1, without being attached to the outside of the door 1 or the doorknob 31, 34.

The doorknob-embedded alarm device 10 of the embodiment can sound an alarm in conjunction with only the operation of opening the door 1, eliminating the following problems: unlike conventional magnetic switch-type door alarm devices, which sound only after the door is opened, shortening the time it takes for workers near the door to recognize the danger; unlike conventional contact sensor-type door alarm devices, which may not be able to detect opening and closing properly at construction sites where workers wear protective gear such as gloves; and unlike conventional proximity sensor-type door alarm devices, which may sound excessively at doors with a large number of people entering and exiting.

The doorknob-embedded alarm device 10 can be easily used by simply replacing the existing doorknob body case (not shown) on the door 1 with the device case 11. Therefore, when work on the site is completed due to construction completion or other reasons, the device can be easily returned to the original doorknob body case, and can be easily transported and used at other sites.

In the embodiment of the doorknob-embedded alarm device 10, the rotating protrusion 17P of the rotating part 17, which is linked to the rotation of the doorknobs 31 and 34, mechanically presses the momentary switch 20, causing the alarm device 16 to output the warning sound ES when electrical conduction is achieved. However, the present invention is not limited to this, and any other configuration may be used as long as the mechanical movement caused by the rotation of the doorknobs 31 and 34 is converted into electrical conduction by the alarm device 16.

In addition, the doorknob-embedded alarm device 10 of the embodiment has been described as a case in which, when the doorknobs 31, 34 are rotated in the direction indicated by the arrow y, the rotating part 17 rotates in the direction indicated by the arrow y1, the latch bolt 14 sinks into the front plate 12, and the door 1 becomes openable. However, this is not limited to the above, and even if the latch bolt 14 is protruding due to the spring force of the latch bolt adjustment spring 19, the doorknobs 31, 34 maintain a neutral rotational position, and the doorknobs 31, 34 are rotated in either the direction indicated by the arrow x or the arrow y, the latch bolt 14 sinks into the front plate 12, and the door 1 becomes openable, a mechanism for pressing down the momentary switch 17 in conjunction with the rotation of the doorknobs 31, 34 can be provided, and the same can be achieved.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

1...door, 10...doorknob built-in alarm device, 11...device case, 12...front plate, 13a, 13b...device case mounting screws, 14...latch bolt, 15...dead bolt, 16...alarm device, 16S...alarm unit (speaker), 17...rotating unit, 17h...square core hole, 17P...rotating protrusion, 18...latch bolt support core, 19...latch bolt adjustment spring, 20...momentary switch, 21...power supply unit, 22a-22c...power supply line, ES...alarm sound, 31...outer doorknob, 32...square core <core member>, 34...inner doorknob, 34h...square core hole.

Claims (5)

A front plate attached to the end surface of the opening side of the door;
a device case provided on the rear side of the front plate and having a space through which a core member that rotates in response to rotation of the doorknob passes;
a latch bolt adjustment mechanism provided inside the device case and configured to cause a latch bolt to protrude or retract from the front plate in response to rotation of the core member;
an alarm device provided inside the device case and configured to output an alarm sound in response to a power supply;
a power supply unit provided inside the device case and configured to supply power to the alarm device via a power supply line;
a switch mechanism that turns on the power supply line in response to the movement of the core member in a direction in which the latch bolt is embedded in the front plate in response to the rotation of the doorknob, and cuts off the power supply line in response to the movement of the core member in a direction in which the latch bolt is protruding from the front plate ,
The core member is a square core that is attached across a pair of the doorknobs that are attached to one surface and the other surface of the door,
The latch bolt adjustment mechanism includes a rotating part having a square core hole into which the square core is inserted,
The switch mechanism turns on the power supply line in response to the rotation of the pivot part in a direction in which the latch bolt is embedded in the front plate in response to the rotation of the doorknob, and cuts off the power supply line in response to the rotation of the pivot part in a direction in which the latch bolt is protruded from the front plate.
Doorknob built-in alarm device. The rotating portion has a rotation protrusion provided on a peripheral portion around which the rotating portion rotates,
The switch mechanism has a momentary switch provided corresponding to a position where the pivot protrusion reaches in conjunction with the rotation of the pivot part in a direction in which the latch bolt is embedded in the front plate in response to the rotation of the doorknob, and the pivot protrusion presses the switch of the momentary switch to make the power supply line conductive.
2. The doorknob-mounted alarm device according to claim 1 . The alarm device has an alarm unit having a plurality of sound holes exposed on the front plate, and outputs the warning sound through the sound holes.
3. The doorknob-mounted alarm device according to claim 1 or 2 . The power supply unit is a battery power supply, and is configured to be battery replaceable.
4. The doorknob-mounted alarm device according to claim 1 . The device case and the front plate are attached to the door in place of a main body case and a front plate of a doorknob already installed on the door.
5. The doorknob-mounted alarm device according to claim 1 .