Base device, decorative plate unit, fire sensor and fire sensing system

Abstract

To provide a fire sensor that is unobtrusive.SOLUTION: A base device of the present invention comprises a pull-in device, and the pull-in device can switch a fire sensor between a state in which it protrudes from a decorative plate and a state in which it does not protrude.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a base device, a decorative panel unit, a fire detector, and a fire detection system used for detecting a fire. [Background technology]

[0002] As described in Patent Document 1, a smoke detector, which is a type of fire detector, is attached to a ceiling or the like to detect smoke caused by a fire. The smoke detector in Patent Document 1 has a detector base installed on a ceiling or the like, and the smoke detector body is attached to the detector base. Patent Document 2 describes a heat detector, which is a type of fire detector, and is fixed to the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-095473 [Patent Document 2] Japanese Patent Application Publication No. 2023-113876 Summary of the Invention [Problem to be solved by the invention]

[0004] Smoke detectors and other fire detectors are installed so that they protrude into the room from decorative panels such as ceiling panels. Because protruding fire detectors into the room can be conspicuous and detract from the aesthetics of the interior, less conspicuous fire detectors have also been developed. For example, in a recessed smoke detector, most of the detector body is located outside the interior surface of the decorative panel, making it less conspicuous than conventional detectors. However, even in a recessed smoke detector, the area around the protruding air inlet is still conspicuous. In a smoke detector, the air inlet for introducing smoke into the smoke detector body protrudes into the interior surface of the decorative panel to allow smoke to easily enter. Even if the smoke detector is installed on the back side of the decorative panel and the area around the air inlet is formed flat on the decorative panel so that it does not protrude into the room, the exposed air inlet will still be conspicuous. A more discreet smoke detector can avoid detracting from the aesthetics of the room's interior.

[0005] The present invention aims to make fire detectors less conspicuous. [Means for solving the problem]

[0006] The base device in one embodiment of the present invention is characterized by comprising a retraction device that can switch the fire detector between a protruding state in which it protrudes from the decorative panel and a retracted state in which it does not protrude. [Effects of the Invention]

[0007] The present invention allows the fire detector to be made less noticeable. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 4 is a vertical cross-sectional view of the base device according to the embodiment attached to a ceiling panel. [Figure 2] FIG. 2 is a longitudinal cross-sectional view of the smoke detector in the embodiment in a protruding state. [Figure 3] FIG. 2 is a longitudinal cross-sectional view of an embodiment of a smoke detector in a retracted state. [Figure 4] FIG. 1 is a plan view of a smoke detector according to an embodiment installed in a hotel guest room. [Figure 5] 10 is an operation flow diagram of a base device when the smoke detector of the embodiment is installed in a hotel guest room. [Figure 6] 1 shows a decorative panel unit according to an embodiment. [Figure 7] A smoke detection system including the smoke detector of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the following embodiment, a smoke detector base device 1 installed on a horizontal ceiling board C will be described. However, the base device 1 may also be attached to a decorative panel such as an inclined ceiling board or wall board. A smoke detector main body S is attached to the base device 1 to form a smoke detector. In the embodiment, a smoke detector is shown as an example of a fire detector. However, other fire detectors such as a heat detector may also be used. In that case, the smoke detector main body S becomes another fire detector main body such as a heat detector main body.

[0010] FIG. 1 is a vertical cross-sectional view of a base device 1 of an embodiment attached to a ceiling panel C. The underside of the ceiling panel C is the room Rm, and the base device 1 is attached to the back side of the ceiling panel C, which is a decorative panel. The back side of the ceiling panel C is on the opposite side from the room Rm. The base device 1 has a sensor base 11 that moves up and down inside. In FIG. 1, the sensor base 11 is shown in a side view. Wiring is not shown in FIG. 1 and other figures.

[0011] The base device 1 has a mounting base 12 and a housing 13, and in FIG. 1 , the mounting base 12 is attached by adhesive to a ceiling board C. An actuator 14 and a control unit 15 are fixed inside the housing 13. The actuator 14 is connected to an actuation plate 16 and can move the actuation plate 16 in the direction of arrow A. Each of the two link mechanisms 17 has one end fixed inside the housing 13 and passes through an opening 122 in the mounting base 12, and the other end fixed to a sensor base 11 provided in a sensor housing 121 in the mounting base 12. The sensor housing 121 is the space inside the cylinder in the mounting base 12, and the sensor base 11 has a cylindrical side panel that is housed in the sensor housing 121.

[0012] 1, the link mechanism 17 extending in the vertical direction includes a first joint 171, a second joint 172, a third joint 173, a first rod 174, and a second rod 175. The first joint 171 and the second joint 172 are connected by the first rod 174, and the second joint 172 and the third joint 173 are connected by the second rod 175. The first joint 171 is fixed to the inside of the housing part 13 and rotatably connects the first rod 174 to the inside of the housing part 13. The second joint 172 rotatably connects the first rod 174 and the second rod 175. The third joint 173 is fixed to the sensor base 11 and rotatably connects the second rod 175 to the sensor base 11.

[0013] The actuation plate 16 has two elongated holes 161 that are parallel to each other and long in the vertical direction, and a second joint 172 is housed in the elongated holes 161. The second joint 172 is movable up and down within the elongated holes 161. In FIG. 1, the two link mechanisms 17 extend linearly in the vertical direction, and the second joint 172 is located at the bottom of the elongated holes 161.

[0014] Two position adjustment slots 131 are provided on the side of the housing 13. The position adjustment slots 131 are long holes that are vertically long. In FIG. 1, the position adjustment screws 18 are threaded through the position adjustment slots 131 and into the screw holes 123 of the mounting base 12, and the housing 13 is fixed to the mounting base 12 by tightening the side portions of the position adjustment slots 131 inward. Therefore, the height position of the sensor base 11 can be adjusted by adjusting the position of the housing 13 relative to the mounting base 12.

[0015] 2 is a vertical cross-sectional view of a smoke detector according to an embodiment, in which the smoke detector main body S is in a protruding state toward the room Rm. The detector base 11 and the smoke detector main body S are shown in a side view. When the smoke detector main body S is attached to the detector base 11 in FIG. 1, the smoke detector with the smoke detector main body S attached to the base device 1 is in a protruding state toward the room Rm from the ceiling board C, part of which is a decorative board, as shown in FIG. 2. The two link mechanisms 17 extend linearly in the vertical direction, and the second joint 172 is located at the bottom of the elongated hole 161.

[0016] The smoke detector body S is cylindrical and has an air inlet F at the bottom of its side. The bottom surface is flat and does not have an air inlet. In Figure 2, the air inlet F of the smoke detector body S protrudes and is exposed on the room Rm side of the ceiling board C. In this state, smoke from a fire enters the smoke detector body S through the air inlet F and is detected.

[0017] The actuator 14 is composed of a monostable linear solenoid. When no voltage is applied to the actuator 14, the operating plate 16 is pulled in as shown in Figure 2, and the two link mechanisms 17 extend linearly in the vertical direction. On the other hand, when a voltage is applied to the actuator 14, the operating plate 16 is pushed out, and the operating plate 16 moves in the direction of arrow A shown in Figure 2.

[0018] Figure 3 is a vertical cross-sectional view of a smoke detector in an embodiment in a retracted state. The detector base 11 and smoke detector main body S are shown in a side view. When a voltage is applied to the actuator 14 in Figure 2 and the actuation plate 16 moves in the direction of arrow A, the smoke detector with the smoke detector main body S attached to the base device 1 enters a retracted state in which it does not protrude from the decorative ceiling board C, as shown in Figure 3. When smoke detection is not required, the smoke detector is switched to the retracted state in which it does not protrude from the decorative board, as shown in Figure 3.

[0019] 2, as the operating plate 16 moves in the direction of arrow A, the vertically long slot 161 and the second joint 172 housed in the slot 161 also move in the direction of arrow A. As a result, the second joint 172 moves diagonally upward and positions itself above the slot 161. The sensor base 11 cannot move sideways due to the inner surface of the mounting base 12, and the third joint 173 also cannot move sideways. The first rod 174 and the second rod 175 then bend in a dogleg shape at the second joint 172, lifting up the third joint 173 and the sensor base 11. As a result, the smoke sensor main body S attached to the sensor base 11 rises to the state shown in FIG. 3, and the underside of the smoke sensor main body S becomes approximately flush with the underside of the ceiling board C, making it inconspicuous from the room Rm side.

[0020] In this manner, the smoke detector main body S is retracted into the detector housing portion 121 shown in Fig. 1. The detector base 11, mounting base 12, housing 13, actuator 14, control portion 15, operating plate 16, and link mechanism 17 provided on the base device 1 in Figs. 1 to 3 constitute a retraction device for retracting the smoke detector main body S. The retraction device can switch the smoke detector with the smoke detector main body S attached to the base device 1 between a protruding state in which it protrudes from the ceiling board C, which is a decorative panel, and a retracted state in which it does not protrude from the ceiling board C.

[0021] If the underside of the smoke detector main body S is not substantially flush with the underside of the ceiling board C due to the thickness of the ceiling board C or the like, loosen the position adjustment screw 18 and move the housing part 13 relative to the mounting base 12. Then, tighten the position adjustment screw 18 to adjust the position of the underside of the smoke detector main body S. This allows the underside of the smoke detector main body S to be substantially flush with the underside of the ceiling board C when smoke detection is not required, and the smoke detector can be placed in a retracted state where it is not noticeable.

[0022] FIG. 4 is a plan view of a smoke detector of an embodiment installed in a hotel guest room GR. FIG. 4 is a plan view of a guest room GR and a corridor H from above, with a bed B, a unit bath U, and the like installed in the guest room GR. A door D is provided between the guest room GR and the corridor H, and a key holder K is provided near the door D. By inserting the key for the guest room GR into the key holder K, power is supplied to the guest room GR and the light (not shown) is turned on. The key holder K functions as a sensor that detects the presence of a person in the guest room GR. The base device 1, smoke detector main body S, and sensor 2 shown in FIG. 4 indicate the positions where the base device 1, smoke detector main body S, and sensor 2 are installed on the ceiling panel C above the guest room GR. The smoke detector main body S is attached to the base device 1, forming a smoke detector.

[0023] FIG. 5 shows an operational flow diagram of the base device 1 when the smoke detector of the embodiment is installed in a hotel guest room GR. The process begins with no voltage supplied to the actuator 14 (step S1). This state corresponds to the protruding state of the smoke detector shown in FIG. 2, in which the smoke detector main body S protrudes downward from the underside of the ceiling board C and is ready to detect smoke from a fire. Then, a determination is made as to whether a key is inserted into the key holder K (step S2). If the result is NO, the process returns to step S1, leaving the smoke detector in the protruding state shown in FIG. 2. If the result is YES, a determination is made as to whether a person is asleep (step S3). The control unit 15 determines whether a person is asleep based on the output of the sensor 2. The sensor 2 may be a camera, a motion sensor, or the like. If the sensor 2 is a camera or a motion sensor, software stored in the control unit 15 can be used to determine whether the sensor output indicates that a person is asleep. This software may be an AI that has learned to determine whether a person is asleep based on the output of the sensor 2 through supervised learning.

[0024] If the answer is YES in step S3, the process returns to step S1, where the protruding state shown in FIG. 2 is maintained. On the other hand, if the answer is NO in step S3, voltage is supplied to actuator 14 (step S4), and the process returns to step S2. When voltage is supplied to actuator 14 in step S4, operating plate 16 moves in the direction of arrow A in FIG. 2, hiding smoke detector body S as shown in FIG. 3, and the smoke detector switches to a retracted state where it does not protrude from the decorative ceiling panel C. Because the smoke detector body S has a flat cylindrical bottom, in the retracted state, the bottom of smoke detector body S is approximately flush with the bottom of ceiling panel C and is therefore inconspicuous. In the retracted state, air inlet F on the side of smoke detector body S is hidden by ceiling panel C, making it unable to detect smoke from a fire. However, since there is someone in cabin GR and they are not asleep, a human response is possible in the event of a fire.

[0025] If the key is removed from the key holder K or the person goes to sleep after voltage is supplied to the actuator 14 in step S4, the process returns to step S1 in step S2 or step S3, and power supply to the actuator 14 is cut off. This causes the smoke detector main body S to protrude downward from the underside of the ceiling board C, as shown in FIG. 2, and switches to a protruding state in which it can detect smoke from a fire. In the base device 1 of this embodiment, when no voltage is supplied to the actuator 14, the smoke detector is in a protruding state in which it can detect smoke. Therefore, even if an abnormality occurs with the actuator 14, it is likely to enter the protruding state, resulting in high safety.

[0026] In FIG. 4, when a guest enters guest room GR, a key is inserted into key holder K, and control unit 15 of base device 1 detects the presence of a person in guest room GR. At this time, the guest has just entered guest room GR and is not asleep, so in step S4, voltage is supplied to actuator 14 of base device 1 under the control of control unit 15. Then, actuator 14 pushes operating plate 16 in the direction of arrow A shown in FIG. 2, switching smoke detector main body S to a retracted state in which it does not protrude from the underside of ceiling board C. As a result, even when a guest looks inside guest room GR, smoke detector main body S does not protrude, allowing the guest to spend time in guest room GR while enjoying the clean, aesthetically pleasing interior. In the event of a fire breaking out in guest room GR, a smoke detector in the retracted state will not detect smoke, but the guest can take action, such as alerting the fire.

[0027] When the guest goes to sleep, the control unit 15 determines that someone is asleep based on the output of sensor 2 in step S3 of Figure 5, resulting in a YES result, and then cuts off the power supply to actuator 14 in step S1. This puts the smoke detector in the state shown in Figure 2, with the smoke detector main body S protruding downward from the underside of the ceiling board C and ready to detect smoke from a fire. Because the guest is asleep, the protruding smoke detector main body S is not visible. Also, when the guest leaves the guest room GR, the key is removed from the key holder K. This causes a NO result in step S2, and the power supply to actuator 14 is cut off in step S1, causing the smoke detector main body S to protrude downward from the underside of the ceiling board C and ready to detect smoke from a fire. In this case, because there is no guest in the guest room GR, the protruding smoke detector main body S is not visible.

[0028] In an embodiment, the base device 1 and sensor 2 shown in FIG. 4 may be attached to a decorative panel such as a ceiling panel to form a decorative panel unit 3. FIG. 6 shows the decorative panel unit 3 as viewed from below when attached to a ceiling. In the decorative panel unit 3, the base device 1 and sensor 2 are attached to a decorative panel 31, which is attached to the ceiling together with other decorative panels. The smoke detector main body S is then attached to the base device 1.

[0029] FIG. 7 shows a smoke detection system equipped with a smoke detector according to an embodiment. The smoke detection system is a fire detection system in which multiple base units 1 are connected to a fire receiver R via a pair of crossover wirings, each consisting of a sensing line CL. Each base unit 1 is equipped with a smoke detector unit S. The end of the sensing line CL is a termination unit E. When any of the smoke detector units S connected to the same sensing line CL detects smoke, the voltage of the sensing line CL is lowered to transmit a fire detection signal. This lowers the voltage supplied to the actuator 14 of the other smoke detector units S connected to the sensing line CL, causing the smoke detector to protrude as shown in FIG. 2, exposing the air inlet F of the smoke detector unit S. Thus, when any of the multiple base units 1 connected to the sensing line CL transmits a fire detection signal, the other base units 1 are forced to protrude. Each sensing line CL is installed by area, such as connecting base units 1 on the same floor. As a result of the above operation, all of the base units 1 in each area protrude and detect a fire.

[0030] As shown in FIG. 1 and other figures, the base device 1 of this embodiment has a mounting base 12 and a housing 13, and the degree of overlap between the mounting base 12 and the housing 13 can be adjusted using the position adjustment slot 131 and the position adjustment screw 18. This allows the amount of protrusion of the smoke detector main body S in the smoke detector to be adjusted so that it does not protrude when the smoke detector is retracted. However, the amount of protrusion of the smoke detector may also be adjusted by providing a threaded recess or projection on the outer periphery of the mounting base 12 and the inner periphery of the cylindrical portion of the housing 13. In this case, the amount of protrusion of the smoke detector can be adjusted by rotating the housing 13 relative to the mounting base 12 to adjust the degree of overlap. Alternatively, the mounting base 12 and the housing 13 may be integrated, and the amount of protrusion of the smoke detector may not be adjustable.

[0031] The sensor 2 shown in Figures 4 and 6 is used to control the base device 1 as a sleeping sensor that detects whether a person is asleep, but it may also be used to control the base device 1 as a presence sensor that detects the presence of a person without using it as a sleeping sensor. The base device 1 may be controlled only by the presence of a person, without using the sleeping status of a guest. When sensor 2 is used as a presence sensor to control the base device 1, the key holder K does not need to be used to control the base device 1. Furthermore, sensor 2 may have the functions of both a sleeping sensor and a presence sensor. Furthermore, a manual switch that forcibly extends the smoke detector may be installed on the wall, etc., so that the voltage supply to the actuator 14 can be cut off by using the manual switch during inspection of the smoke detector, thereby enabling the smoke detector to be extended.

[0032] The detector base 11, mounting base 12, housing 13, actuator 14, control unit 15, operating plate 16, and link mechanism 17 provided in the base device 1 constitute a retraction device for retracting the smoke detector main body S. However, the retraction device may have a different configuration as long as it can set the fire detector to a protruding state in which it protrudes from the decorative board and a retracted state in which it does not protrude from the decorative board. For example, the main body of a linear actuator that moves the moving part up and down may be fixed to the housing 13 or the like, and the moving part may be fixed directly to the detector base 11 to move the detector base 11 up and down.

[0033] In the embodiment, a smoke detector is used as an example of a fire detector. However, the present invention may be implemented with other fire detectors, such as a heat detector, and the other fire detector may be implemented as a component of another fire detection system, such as a heat detection system. In this case, the smoke detector body S is another fire detector body, such as a heat detector body. For example, the heat detector may be implemented with an external appearance similar to that of the smoke detector body S shown in FIG. 2. This heat detector body is equipped with a thermistor inside an air inlet F provided on the side. High-temperature gases caused by a fire enter the interior through the air inlet F, and the fire is detected by heat detection by the thermistor inside. The heat detection by the thermistor in this heat detector body and the configuration of the air inlet F provided on the side are basically the same as those described in Patent Document 2.

[0034] Furthermore, the specific configuration is not limited to the embodiments, and the present invention includes design changes within the scope of the present invention. Furthermore, the above-mentioned modified examples can be combined by utilizing each other's technology as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0035] C Ceiling panel, Rm Room, S Smoke detector body, F Air inlet, A Arrow, H Corridor, GR Guest room, U Unit bath, D Door, K Key holder, R Fire receiver, CL Detection line, E Terminal device, 1 base device, 11 detector base, 12 mounting base, 121 detector housing, 122 opening, 123 screw hole, 13 housing, 131 position adjustment slot, 14 actuator, 15 control unit, 16 actuation plate, 161 slot, 17 link mechanism, 171 first joint, 172 second joint, 173 third joint, 174 first rod, 175 second rod, 18 position adjustment screw, 2 sensors, 3 decorative panel units, 31 decorative panel

Claims

1. Equipped with a retraction device, The base device is characterized in that the retraction device can switch the fire detector between a protruding state in which it protrudes from the decorative panel and a retracted state in which it does not protrude from the decorative panel.

2. 2. The base device according to claim 1, wherein the projection amount of the fire detector is adjustable.

3. 2. The base device according to claim 1, wherein the base device detects the presence of a person and sets the fire detector to a retracted state.

4. 4. The base device according to claim 3, wherein even if it detects the presence of a person, if it detects that the person is sleeping, it sets the fire detector to the protruding state.

5. A decorative panel unit comprising a sensor for detecting a person and the base device of claim 3 or 4 mounted on a decorative panel.

6. A base device according to any one of claims 1 to 4; a fire detector body attached to the base device, The fire detector is characterized in that the fire detector body is cylindrical and has an air inlet on the side.

7. A fire alarm receiver, A plurality of base devices according to any one of claims 1 to 4 are provided, The plurality of base devices are connected to the fire receiver by sensing lines, A fire detection system characterized in that when a fire detection signal is sent from any one of the multiple base devices connected to the detection line, the other base devices are put into a protruding state.

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