JP7626825B2 - Disaster prevention monitoring system receiver - Google Patents

Description

This invention relates to a receiver used in a disaster prevention monitoring system (including a fire alarm system), such as a fire receiver that receives signals from fire detectors, transmitters, etc. to warn of fires, and in particular to a technology that is effective when used as a mechanism to prevent erroneous operation of a cover that covers the switches on the front panel of the receiver.

Fire receivers are equipped with an information display that shows the location (area) of a fire or other event and the details of the event, a speaker that emits an alarm sound, and various switches. In addition, the switches and displays that need to be operated in an emergency are arranged separately from those that are needed for testing and inspection, and the switches and displays that are needed for testing and inspection may be covered with a cover to prevent erroneous operation or installed inside a sub-door that can be opened and closed so that they cannot be operated under normal circumstances. The switches that are needed for testing and inspection also include various mode settings that determine the operation when the fire alarm system is activated.

Fire receivers generally have the function of receiving fire signals from detectors and notifying the building manager of the building in question of a fire.They are usually installed in special rooms such as disaster prevention centers and management offices, but in smaller buildings and other facilities, they may be installed in places where third parties other than those authorized to operate the receivers may enter.
In a fire receiver installed in a place where a third party may enter, there is a risk that a third party may open the cover or sub-door and tamper with or operate the receiver illegally, resulting in a false alarm or a malfunction when needed. Therefore, it is conceivable to add a lock to the cover or sub-door on the receiver's operating section, but if this is done, when firefighters rush to the scene after receiving notice of a fire or when the building manager or other relevant parties authorized to operate the receiver forget the key, it is expected that they will not be able to open the cover or sub-door and operate the switches inside.

Japanese Utility Model Application Publication No. 04-114696

In the past, an invention has been proposed in which a disaster prevention receiver is provided with a covering plate (cover) to prevent the lid (cover) covering the switches from being easily opened or closed, thereby preventing tampering with the switches (Patent Document 1).
The technology described in Patent Document 1 is a configuration in which a cover plate that covers the display operation unit and part of the lid of a fire receiver and a guide rail that supports the cover plate are provided on the display operation unit and the lid, respectively, to prohibit the operation of the display operation unit and the opening of the lid. When this technology is applied, it is effective in preventing tampering, but since the cover plate is fixed with screws, it cannot be removed without using tools.

As a result, in the event of an emergency, the screw fastenings become an obstacle when building managers or firefighters try to operate the necessary switches, and manufacturers have to produce tamper-proof products with cover plates and guide rails separately from standard products that do not, which increases costs. Also, while it is possible to attach the cover plate that covers the display and operation unit with double-sided tape, doing so necessitates the need to remove the double-sided tape and clean the surface if it is desired to reuse the product, which creates the problem of making it difficult to reuse.

The present invention has been made with attention to the above-mentioned problems, and its purpose is to provide a receiver for a disaster prevention monitoring system which prevents tampering or unauthorized operation of switches by third parties, while at the same time not interfering with the necessary operations or tasks for building managers and inspection workers.
Another object of the present invention is to provide a receiver for a disaster prevention monitoring system which can be easily manufactured into tamper-proof versions and normal versions without tamper-proof versions, thereby suppressing the increase in costs associated with the manufacturing process.

In order to solve the above problems, the present invention relates to
A disaster prevention monitoring system receiver having a housing including a box-shaped main body with one side open and incorporating a control board capable of detecting the occurrence of an event in response to a signal from a terminal device installed within a monitored area, and a front panel that is attached to close the opening of the box-shaped main body and has an operation display unit that can display the occurrence of a detected event and information corresponding to the event and that can be operated to input,
an opening is provided in the front panel, and a pair of walls are provided on the rear side of the front panel so as to face each other and sandwich the opening;
a cover for closing a part of the opening is provided so as to be rotatable about one side of the cover;
switches are arranged in the portion of the front panel covered by the cover,
The pair of walls are each formed with a guide hole at a position corresponding to an open side of the cover,
a cover rotation preventing member having an insertion portion insertable into the guide hole, the insertion portion being inserted into the guide hole to prevent rotation of the cover when the front panel closes the opening of the box-shaped main body ;
A movement preventing means capable of preventing movement of the cover rotation preventing member is provided on the back side of the front panel, and the movement preventing means is configured to be convertible between a state that prevents movement of the cover rotation preventing member and a release state that allows movement .

With a receiver having the above-described configuration, when the front panel (parent door) closes the opening of the box-shaped main body, the cover rotation preventing member prevents the cover (child door) from rotating, so that the cover cannot be opened to operate the switches inside, and since the cover rotation preventing member cannot be removed while the front panel (parent door) is closed, it is possible to prevent tampering with or unauthorized operation of the switches by third parties.
In addition, by opening the front panel and converting the movement preventing means, the cover rotation preventing member can be removed, thereby allowing the cover to be rotated, and the covers can be opened to operate the switches inside, so that building managers and inspection workers are not hindered in any way in carrying out the necessary operations and work.

Furthermore, since the cover rotation preventing member that prevents the cover from rotating is designed to be easily removable, it is easy to produce tamper-proof products and normal products without the measures, which not only prevents the increase in costs associated with producing different products but also makes it easy to reuse them after restoration.
In addition, in a receiver that does not have a cover rotation preventing member, dust and water can be prevented by inserting a grommet or the like into the guide hole for inserting the insertion portion of the cover rotation preventing member, and the guide hole can be made less noticeable, so that the aesthetic appearance is not marred.

Here, it is preferable that the cover rotation preventing member is formed of an elongated member, and both ends of the elongated member are inserted into the guide holes of the pair of wall portions, respectively.
The movement preventing means is rotatably provided in correspondence with one of the guide holes, and is configured to prevent the long member inserted into one of the guide holes from moving axially outward when rotated in a first direction , and to allow the long member inserted into one of the guide holes to move axially outward when rotated in a second direction .
With this configuration, the long member acting as a cover rotation preventing member cannot be moved significantly in the axial direction, making it impossible to remove the long member with the front panel remaining closed, thereby preventing a third party from opening the cover and tampering with or operating the internal switches illicitly.

Furthermore, it is preferable that a movement preventing portion be provided on the rear surface of the front panel corresponding to the other guide hole , which prevents the elongated member inserted into the guide hole from moving in the direction opposite to the axial outward direction .
According to this configuration, since the long member cannot be moved in either axial direction while the front panel is closed, it is possible to prevent a third party from opening the cover and tampering with or operating the switches inside. Also, since the long member can be removed by opening the front panel and rotating the movement prevention means in the second direction , this does not pose any obstacle to the building manager or inspection worker in carrying out the necessary operations or work.

Also, preferably, a first group of switches is arranged in a portion of the front panel that is not covered by the cover, the first group of switches being enabled when the control board detects the occurrence of an event,
A second group of switches including switches that are always enabled while the power is on is disposed in a portion of the front panel that is covered by the cover.

With a receiver configured as described above, the first group of switches arranged in a portion not covered by the cover are enabled when an event such as a fire is detected. Therefore, if the receiver is installed in a location where third parties other than those authorized to use the receiver may enter, the device will not react even if a third party tamper with the switches, and erroneous notifications or displays can be avoided. In addition, the second group of switches that are always enabled while the power is on are located inside the cover, so it is possible to prevent third parties from tampering with or illegally operating these switches.

Here, the second group of switches that are always enabled while the power is on include switches that are operated when testing or inspecting the receiver, switches that are operated to activate specified equipment of the disaster prevention monitoring system when an event occurs, and switches that set the operating mode.
If these switches are operated carelessly, there is a risk that the system will give erroneous alarms or displays. However, because they are arranged in areas that are covered, it is possible to prevent them from being operated by third parties, thereby improving the reliability of the device.

Also, preferably, the front panel is provided with a lock for maintaining the front panel in a closed state,
The lock does not require a key and can be opened with a coin or a tool.
With this configuration, tampering by third parties can be prevented, while firefighters who rush to the scene after receiving notice of a fire or other relevant personnel who have forgotten their keys can use a coin or tool to open the cover and operate the switch inside, thereby avoiding situations where firefighters, building managers, and other relevant personnel are unable to perform necessary operations.

The receiver for a disaster prevention monitoring system of the present invention can prevent tampering or unauthorized operation of switches by third parties, and can also prevent building managers and inspection workers from being hindered in carrying out necessary operations and tasks. In addition, it is easy to manufacture products with tamper prevention measures and normal products without measures, which has the effect of suppressing the increase in costs associated with manufacturing different products.

1 is a perspective view showing an embodiment of a fire receiver to which the receiver according to the present invention is effectively applied; 1 is a perspective view showing a state in which a sub-door is open in a fire control panel according to an embodiment of the present invention; FIG. 2 is a front view showing an example of the configuration of a front panel in the fire control device of the embodiment. 1A and 1B are perspective views showing a state in which a stopper rod is attached to the front panel of a fire receiver according to an embodiment, and FIG. 1B is a perspective view showing an example of the configuration of the back side of the front panel. 1A is a perspective view showing an example of a structure for preventing axial movement of a stopper rod, in which (A) is a perspective view showing a state in which a handle serving as a movement prevention means is lowered, and (B) is a perspective view showing a state in which the handle is raised. 1A is an exploded perspective view showing a state before the handle is assembled, and FIG. 1B is a perspective view showing a state after the handle is assembled, showing a method of assembling a handle that prevents axial movement of a stopper rod. 11 is an explanatory diagram showing the first half of the procedure for attaching the stopper rod to the front panel of the fire control panel of the embodiment. FIG. 13A to 13C are explanatory views showing the latter half of the procedure for attaching the stopper rod to the front panel. 1 is an oblique view showing a state in which an operation display panel is removed from a front panel of a fire control device according to an embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The fire receiver of this embodiment is installed in a corner of a building, receives fire signals from sensors and transmitters installed within the building, and has the function of sounding the local sound system to notify of the occurrence of a fire by sound, as well as alerting the occurrence of a fire by displaying lamps or other indicators on the front panel of the fire receiver.

As shown in FIG. 1, the fire receiver comprises a metal body 20 in the shape of a box with one side (the front) open, and a metal front panel 10 attached to one side (the right side in the figure) of the main body 20 so as to be able to open and close by hinges 21A, 21B, and the front panel 10 and the main body 20 form the housing of the receiver.
As shown in FIG. 1, an opening 10a is formed in the center of a front panel 10 of the fire control panel of this embodiment, and an operation display panel 10A for various display and input operations is provided in this opening 10a.

As shown in Figure 3, the operation display panel 10A of the fire receiver (P type) of this embodiment is provided with a district display window 12 for the fire alarm line, which displays the line where a fire has been reported or the line where a detector wire has been broken, and a district display window 13 for the smoke control line, which displays the location where a fire has occurred or the location where a smoke control terminal or the like has been activated. The district display windows 12 and 13 are composed of multiple lamps for each district line that notify the occurrence of a fire or the activation of a smoke control terminal (such as a smoke control damper or smoke control shutter), and a display column (display plate) that shows in text the district name or installation location corresponding to each lamp.

The operation display panel 10A is further provided with a main operation unit 11 which displays the operating status of the fire receiver, such as the power-on status, fire alert, and transmitter signal input, by lighting up various lamps, a speaker 14 which notifies of the occurrence of a fire, etc., an audio operation unit 15 which has a push button 15a for stopping the sound of the receiver and a push button 15b for stopping the bell (district sound), an information display unit 16 consisting of a dot matrix type VFD (fluorescent display) or LCD (liquid crystal display) for displaying information such as the operating mode of the receiver and the results of various tests when they are conducted, a display operation unit 17 which has a shift button for changing the displayed content, and an information operation unit 18 which has an information button 18a and an information lamp 18b for displaying the details of the fire and abnormality of the receiver on the information display unit 16 for confirmation.
The display operation section 17 is provided with a forward shift button 17A, a reverse shift button 17B, a return button 17C for returning the operation to the previous step, and a decision button 17D for finalizing the process.

The lower part of the front panel 10 of the fire receiver is provided with an internal operation section 19 having a battery test switch button 19A for instructing the start of a battery test, a fire test switch button 19B for instructing the start of a fire test, a test recovery button 19C for instructing recovery from a test, a fire recovery button 19D for instructing recovery from a fire test, a switch button 19E for stopping the fire prevention and smoke exhaust interlock during inspection, a switch button 19F for stopping the fire hydrant pump start interlock during inspection, a switch button 19G for stopping the emergency broadcast transfer interlock during a fire, a switch button 19H for stopping the transfer during a fire (the function of sending a fire signal to other equipment), and a switch button 19I for operating or restoring the desired smoke prevention and exhaust equipment during inspection or in the event of a fire.

Furthermore, the front panel 10 is provided with a child door 22 made of a resin panel as an operation unit cover so as to cover the front of the internal operation unit 19, and is configured to prevent the switch buttons 19A to 19I inside the child door 22 from being easily operated. As shown in Fig. 2, the child door 22 is configured so as to be able to open and close back and forth around a hinge provided at the bottom end. The child door 22 may be transparent or non-transparent.
Although not shown, a control board that receives command inputs from the operation units (11, 17, 18) and drives the display units (11, 16, 18) and the speaker 14 is installed inside the housing of the fire receiver (10, 20). Furthermore, a backup power supply device that supplies power to the control board and the like in the event of a power outage of the commercial AC power supply is provided inside the housing of the fire receiver.

The various switches provided in the main operation unit 11, display operation unit 17 and information operation unit 18 are configured to be enabled for operation only when an event occurs by a control board that is provided inside the housing, i.e., inside the front panel 10, and controls the display of each of the above-mentioned display units.
Meanwhile, on the inside of the sub-door 22, there are provided switch buttons that are operated during inspection work and testing, and switch buttons that are operated to set the operating mode of the receiver, and whose operation is accepted at any time by the control board. That is, in the receiver of this embodiment, the switch buttons that will not cause problems if operated tamperingly or fraudulently are provided above the sub-door 22 and exposed on the surface of the front panel 10, and the switch buttons that will cause problems if operated tamperingly or fraudulently are provided on the inside of the sub-door 22. Furthermore, as will be described below, the sub-door 22 is configured so that it cannot be opened or closed unless the front panel 10 is opened.

4 to 7 show specific examples of structures for preventing the sub-door 22 from being easily opened or closed.
As shown in Fig. 9, a rectangular frame 23 corresponding to the opening 10a is provided on the rear side of the front panel 10, and as shown in Fig. 4(B), guide holes 24A, 24B are formed in both side walls 23A, 23B of this frame 23 at height positions corresponding to the upper side of the sub-door 22, and both ends of a single stopper rod 24 are inserted into these guide holes 24A, 24B so that it can be held in a horizontal state. When the front panel 10 is closed, as shown in Fig. 4(A), the stopper rod 24 is configured to come into contact with the upper part of the sub-door 22 or to face it with a small gap therebetween.

An operation display panel 31 equipped with an operation display board 33 consisting of a printed wiring board on which indicator lamps, push button switches, etc. are mounted is attached to the inside of the frame body 23, and the front of the operation display panel 31 is covered with a resin sheet, such as a membrane sheet, on which marks for push buttons, etc. are printed.
In addition, a lock 25 such as a cylinder key is provided on the side of the opening of the front panel 10. When a key is inserted into this lock 25 to unlock it, the front panel 10 can be rotated to open the front of the main body 20, as shown in FIG. 4(B).

The fire receiver shown in Figure 4 is a product suitable for installation in locations where third parties other than those authorized to use the receiver may enter. Even if a person other than the administrator attempts to open the sub-door 22, the stopper rod 24 prevents the sub-door 22 from rotating, i.e., opening, and therefore the switch buttons 19A-19I located on the inside cannot be operated. This prevents third parties from mischievously or fraudulently operating the switches.

On the other hand, a fire receiver installed in a building's disaster prevention center or central control room, as shown in Figures 1 and 2, is not provided with a stopper rod 24, and grommets 26 are inserted into guide holes 24A, 24B in both side walls 23A, 23B of the frame body 23 into which the stopper rod 24 is inserted, thereby preventing foreign objects from entering and preventing the aesthetic appearance (design) from being marred.
As described above, in this embodiment, when producing a tamper-proof product provided with the stopper rod 24 and a normal product not having the stopper rod 24, it is only necessary to select whether to insert the stopper rod 24 or the grommet 26 into the guide holes 24A, 24B, which makes it easy to produce them and avoids a significant increase in cost.

Furthermore, the fire control device of this embodiment is provided with a structure for preventing the stopper rod 24 from coming off. The structure for preventing the stopper rod 24 from coming off will be described below with reference to Figs.
5 and 6 are enlarged views showing components that constitute the structure for preventing the stopper rod 24 from coming off.

As shown in FIG. 5, a hinge base 27 is fixed to the back surface of the front panel 10 corresponding to one end of the stopper rod 24, and a pin 28 inserted into this hinge base 27 supports a handle 29 so that it can rotate up and down. The handle 29 is provided in correspondence with a guide hole 24B for inserting the stopper rod formed in the side wall 23B of the frame body 23, and as shown in FIG. 5(B), when the handle 29 is rotated upward, the stopper rod 24 can move below it. Also, as shown in FIG. 5(A), when the handle 29 is rotated downward, the side surface of the handle 29 can prevent the movement of the stopper rod 24.

6(B), a groove 28a is formed on the outer circumferential surface of the tip of the pin 28, and an E-ring 30 is fitted into this groove 28a to prevent the pin 28 from falling off. Also, as shown in FIG. 4(A), an end plate 32 is provided on the back surface of the front panel 10 corresponding to the other end of the stopper rod 24 to prevent the stopper rod 24 from moving in the opposite direction to the above.
As shown in FIG. 5, a lock 25 and a lock plate 25A that is rotated by this lock 25 are provided above the handle 29. When a key (coin, etc.) is inserted into the lock 25 and turned, and the lock plate 25A is placed in a vertical position, the front panel 10 can be opened and closed. When the lock plate 25A is placed in a horizontal position as shown in FIG. 6, the tip of the lock plate 25A engages with the edge of the main body 20, and the front panel 10 is locked and cannot be opened.

Next, the procedure for mounting the stopper rod 24 on the front panel 10 will be described with reference to FIGS.
To attach the stopper rod 24 to the front panel 10, the front panel 10 is opened and the sub-door 22 is closed. Then, with the handle 29 raised as shown in Fig. 7, one end of the stopper rod 24 is inserted into the guide hole 24B formed in the side wall 23B (handle 29 side) of the frame 23 on the back surface of the front panel 10, and passed under the handle 29.

Next, when the end of the stopper rod 24 has been inserted about one-third of the way, the stopper rod 24 is moved in the opposite direction and the other end is inserted into the guide hole 24A formed in the side wall 23A (end plate 32 side) of the frame body 23, and the stopper rod 24 is inserted until it hits the end plate 32. Then, as shown in Figure 8, the handle 29 on the back of the front panel 10 is lowered so that the stopper rod 24 cannot move left or right, and the front panel 10 is closed, completing the installation of the stopper rod 24. Note that to remove the stopper rod 24, the above steps can be reversed.

As described above, in the fire control panel of this embodiment, the sub-door 22 is hinged at its lower end so that it can be opened and closed, and the stopper rod 24 is provided on the rear surface of the front panel 10 at a position corresponding to the upper end, which is the open side, of the sub-door 22, so that when the front panel 10 is closed and the lock 25 is locked, the sub-door 22 cannot be opened. This makes it possible to prevent mischief or fraudulent acts such as opening the sub-door 22 and operating the internal switches.
In addition, after unlocking the lock 25 and opening the front panel 10, the handle 29 on the back surface of the front panel 10 is raised and the stopper rod 24 is moved and removed, which allows the sub-door 22 to be opened and the internal switches to be operated. This makes it possible to allow switches to be operated by relevant parties such as the building manager who has the key to unlock the lock 25, while preventing switch operation by third parties other than the relevant parties.

It is possible to provide only switches operated by the building manager or inspection workers on the inside of the sub-door 22, but if switches operated by firefighters are provided on the inside of the sub-door 22, a coin lock can be used as the lock 25 so that firefighters and other relevant parties who rush to the scene upon receiving notice of a fire can use a coin or tools to open the front panel 10, lift the handle 29, remove the stopper rod 24, open the sub-door 22, and operate the switches.
In addition, fire receivers to be installed in special rooms such as disaster prevention centers and control rooms can be provided with a front panel with a coin lock that does not require a key (without a stopper rod), while fire receivers to be installed in places where third parties may enter can be provided with a front panel with a lock that requires a key and a stopper rod, allowing the products to be produced according to need.

The invention made by the inventor has been specifically described above based on an embodiment, but the present invention is not limited to the above embodiment. For example, in the above embodiment, a rod-shaped member is used as the stopper rod 24, but a long plate-shaped member may be used as long as it is a rigid member. Also, in the above embodiment, the child door 22 is provided on the front side of the front panel (parent door) 10, but it may be provided on the main body 20 side. Even in this case, by providing the stopper rod 24 on the front panel 10, it is possible to prevent the child door 22 from opening.

Furthermore, in the above embodiment, the sub-door 22 is provided so as to be rotatable about the lower side as a fulcrum, but it may be provided so as to be rotatable about the upper side or either the left or right side as a fulcrum.
In addition, in the above explanation, the present invention has been described using an example in which it is applied to a P-type fire receiver, but the present invention is not limited to P-type fire receivers and can be applied to R-type fire receivers and other receivers that can form a monitoring system.

10 Front panel (chassis)
11 Main operation unit 12 Area display window for fire alarm line 13 Area display window for smoke control line 14 Speaker 15 Audio operation unit 16 Information display unit (display device)
17 Display operation unit 18 Information operation unit 19 Internal operation unit 20 Main body (housing)
21 Child door (cover)
23 Frame body 24 Stopper rod (long member)
25 Lock 26 Grommet 27 Hinge base 29 Handle (first movement prevention means)
32 End plate (second movement prevention means)

Claims (6)

A receiver for a disaster prevention monitoring system, comprising a housing including a box-shaped main body with one side open and incorporating a control board capable of detecting the occurrence of an event in response to a signal from a terminal device installed within a monitored area, and a front panel that is attached to close the opening of the box-shaped main body and has an operation display unit capable of displaying the occurrence of a detected event and information corresponding to the event and that allows input operations,
an opening is provided in the front panel, and a pair of walls are provided on the rear side of the front panel so as to face each other and sandwich the opening;
a cover for closing a part of the opening is provided so as to be rotatable about one side of the cover;
switches are arranged in the portion of the front panel covered by the cover,
The pair of walls are each formed with a guide hole at a position corresponding to an open side of the cover,
a cover rotation preventing member having an insertion portion insertable into the guide hole, the insertion portion being inserted into the guide hole to prevent rotation of the cover when the front panel closes the opening of the box-shaped main body ;
A receiver for a disaster prevention monitoring system, characterized in that a movement preventing means capable of preventing movement of the cover rotation preventing member is provided on the back side of the front panel, and the movement preventing means is configured to be convertible between a state that prevents movement of the cover rotation preventing member and a released state that allows movement . The cover rotation preventing member is formed of an elongated member, and both ends of the elongated member are inserted into the guide holes of the pair of wall portions,
The receiver for a disaster prevention monitoring system as described in claim 1, characterized in that the movement preventing means is rotatably provided in correspondence with one of the guide holes, and is configured to prevent axial outward movement of the long member inserted into one of the guide holes when rotated in a first direction, and to allow axial outward movement of the long member inserted into one of the guide holes when rotated in a second direction . A receiver for a disaster prevention monitoring system as described in claim 2, characterized in that a movement preventing portion is provided on the back surface of the front panel corresponding to the other guide hole , which prevents the elongated member inserted into the guide hole from moving in the direction opposite to the axial outward direction. a first switch group is disposed in a portion of the front panel that is not covered by the cover, the first switch group being enabled when the control board detects the occurrence of an event;
A receiver for a disaster prevention monitoring system as described in any one of claims 1 to 3, characterized in that a second group of switches including switches that are always enabled while the power is on are arranged in the portion of the front panel covered by the cover. The receiver for a disaster prevention monitoring system according to claim 4, characterized in that the switches that are always enabled while the power is on are a switch that is operated when the receiver is tested or inspected, a switch that is operated to activate a specific piece of equipment in the disaster prevention monitoring system when an event occurs, and a switch that sets the operating mode. The front panel is provided with a lock for maintaining the front panel in a closed state,
6. The receiver for a disaster prevention monitoring system according to claim 1, wherein the lock does not require a key and can be opened with a coin or a tool.

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