Sensor base

Abstract

To enable easy selection of installation locations and types of fire sensors according to installation sites.SOLUTION: A sensor base according to the present invention includes a blade receiving bracket that engages with a blade fitting of a fire sensor main unit, a battery that supplies power to the fire detector main unit, and can be installed without drilling holes at installation sites, and is used for installation testing.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a detector base for mounting a fire detector body. [Background technology]

[0002] When installing a fire detector such as a spot-type smoke detector or heat detector in a building, as shown in Patent Document 1, holes for wiring are drilled in the ceiling or wall, etc., and the detector base is fixed therein, and wiring is passed through the hole from the ceiling or other space and connected to the terminals on the detector base. The fire detector is then installed by attaching the fire detector main body to the detector base. The detector base and the fire detector main body are removably fixed and electrically connected by a blade metal fitting and a blade receiving metal fitting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-57317 Summary of the Invention [Problem to be solved by the invention]

[0004] Fire detectors must be installed in appropriate locations. For example, they cannot be installed in locations where condensation occurs. They also cannot be installed in locations that are susceptible to electromagnetic waves or where they are exposed to warm air from air conditioners. Environmental noise such as condensation, electromagnetic waves, and warm air from air conditioners can cause fire detectors to malfunction, resulting in false alarms. Currently, fire detector installation locations are determined based on the installer's experience, etc.

[0005] On the other hand, from a design perspective, there are cases where it is desirable to install a fire detector in a location where it is unclear whether it will be affected by environmental noise. However, installing a fire detector in such a location can be difficult. For example, if a false fire alarm occurs due to environmental noise after installing a fire detector in such a location, the fire detector must be moved. However, after the movement, holes for wiring will remain in the ceiling, etc., and the ceiling panels, etc. will have to be replaced.

[0006] Furthermore, when selecting a fire detector to use from the many types of fire detectors available, it may be necessary to conduct an experiment that recreates the actual environment. In this case, the experiment must be conducted in a laboratory to recreate the actual environment, which is expensive. Furthermore, it is not possible to completely recreate the actual environment in a laboratory.

[0007] An object of the present invention is to make it possible to easily select the installation location, type, etc. of a fire detector according to the installation site. [Means for solving the problem]

[0008] The detector base in one embodiment of the present invention is characterized by having a blade receiving fitting that engages with the blade fitting of the fire detector body, having a battery that supplies power to the fire detector body, being able to be installed at the installation location without drilling holes, and being used for installation testing. [Effects of the Invention]

[0009] According to the present invention, by temporarily installing the fire detector main body at the installation site and conducting an installation test, it is possible to easily select the installation location and type of fire detector according to the installation site. [Brief explanation of the drawings]

[0010] [Figure 1] A side view showing the installation status of a conventional P-type fire detector. [Figure 2] FIG. 2 is a diagram showing a sensor base according to the first embodiment. [Figure 3] FIG. 2 is a diagram showing a state in which a P-type fire detector is attached to a detector base in Example 1 and temporarily installed. [Figure 4] FIG. 2 is a sequential diagram when a P-type fire detector is attached to the detector base in Example 1. [Figure 5] FIG. 10 is a sequential diagram when an R-type fire detector is attached to the detector base in Example 2. [Figure 6] FIG. 10 is a diagram showing a sensor base in a third embodiment. [Figure 7] FIG. 10 is a diagram showing a state in which a P-type fire detector is attached to a detector base in Example 3 and temporarily installed. DETAILED DESCRIPTION OF THE INVENTION

[0011] Before describing embodiments of the present invention, the installation status of a conventional P-type fire detector will be described. Fig. 1 is a side view showing the installation status of a conventional P-type fire detector. Only the ceiling board C portion is shown in cross section. A detector base B is fixed to the ceiling board C. A P-type fire detector main body PS, which is the fire detector main body, is removably attached to the detector base B. The P-type fire detector is composed of the P-type fire detector main body PS and the detector base B. The P-type fire detector main body PS is provided with a confirmation light PSL that lights up when a fire is detected.

[0012] Conventional detector base B is installed by drilling hole H in ceiling panel C. When installing detector base B on ceiling panel C, wire L is connected to detector base B from the top of ceiling panel C through hole H. Wire L is connected to a fire receiver (not shown). Detector base B is screwed to ceiling panel C. Thus, when installing a conventional P-type fire detector, hole H must be drilled in ceiling panel C for detector base B. Therefore, when changing the position of a P-type fire detector due to a false fire alarm, etc., the ceiling panel C with hole H must be replaced. These points are the same when installing an R-type fire detector, etc. Note that "hole" in this application means a hole that is large and noticeable enough to require the ceiling panel C to be replaced.

[0013] In an embodiment of the present invention, an installation test is performed by temporarily installing a fire detector without drilling holes H in the ceiling panel C. After the installation test, holes H are drilled in positions where the installation test has shown that no false fire alarms will occur, and detector base B is installed, and the fire detector main body is attached to detector base B and put into operation. [Example]

[0014] FIG. 2 shows the detector base 1 in Example 1. FIG. 2(a) is a view of the detector base 1 from the side where the P-type fire detector main body PS is attached. When the detector base 1 is installed on a ceiling board C, it is viewed from below. FIG. 2(b) is a side view showing the detector base 1 installed on the ceiling board C in the up-down direction. As shown in FIGS. 2(a) and 2(b), the detector base 1 includes a housing 11, a control unit 12, a battery 13, a detector interface 14, a card writer 15, a blade receiving bracket 16, a power line 171, a detector connection line 172, a data line 173, and a magnet 18. The control unit 12 includes a CPU and memory. The blade receiving bracket 16 engages with a blade (not shown) of the P-type fire detector main body PS. The detector base 1 of Example 1 is used for installation testing.

[0015] The housing 11 has a shape in which the top surface of a cylinder is closed in the vertical direction when it is installed on a ceiling board C. The housing 11 has a disk-shaped top plate 111 on the top surface and a cylindrical wall 112 extending downward from the edge of the top plate 111. As shown in FIG. 2(a), the top plate 111 is provided with a marked hole 111a. The marked hole 111a is a hole that leads to the ceiling board C when the sensor base 1 is installed on the ceiling board C, and in Example 1, it is formed as an arc-shaped elongated hole. Once the installation position of the fire detector has been determined, the elongated hole can be traced with a pencil or the like to serve as a mark for drilling a hole H in the ceiling board C. In addition, the top plate 111 is provided with oblique small holes 111b at multiple locations. The oblique small holes 111b are small holes that are drilled obliquely from the inside toward the outer periphery, and allow installation pins (not shown) to be inserted.

[0016] As shown in FIG. 2(a), the housing 11 contains the control unit 12, battery 13, sensor interface 14, card writer 15, blade receiving bracket 16, power line 171, sensor connection line 172, and data line 173. These components are fixed to the top panel 111. The card writer 15 is connected to the cylindrical wall 112, and as shown in FIGS. 2(a) and 2(b), the outside of the portion of the cylindrical wall 112 where the card writer 15 is connected is flat. A thin, disk-shaped magnet 18 is fixed to the top surface of the housing 11. The above-mentioned marking hole 111a and oblique slit 111b are also formed in the magnet 18. A memory card M is inserted from the outside of the housing 11 into the card writer 15, which is the recording device shown in FIG. 2. The card writer 15 is a recording device that records data on the memory card M.

[0017] In the detector base 1, the battery 13 supplies power to the control unit 12, detector interface 14, and card writer 15 via a power line 171. The control unit 12 is also connected to the detector interface 14 and card writer 15 via a data line 173. The two blade receiving fittings 16 are detachably connected to blade fittings (not shown) of the P-type fire detector main body PS. The detector interface 14 connects between the two blade receiving fittings 16 via a detector connection line 172, and supplies power and transmits information to the P-type fire detector main body PS.

[0018] FIG. 3 is a side view showing the P-type fire detector main body PS attached to the detector base 1 of Example 1 and temporarily installed on the underside of a ceiling board C. The ceiling board C and light-gauge steel frame substrate LGS are shown in cross section, with the ceiling board C fixed by the light-gauge steel frame substrate LGS. The P-type fire detector main body PS is fixed by attaching the cutting edge fitting to the cutting edge receiving fitting 16 of the detector base 1. Then, due to the magnetic action between the magnet 18 and the light-gauge steel frame substrate LGS, the detector base 1 with the P-type fire detector main body PS attached can be temporarily installed on the underside of the ceiling board C. Therefore, installation is possible without drilling holes H at the installation location, and the installation position of the P-type fire detector main body PS can be easily changed during installation tests.

[0019] If the sensor base 1 cannot be temporarily installed on the ceiling board C using the magnet 18, for example because there is no light-gauge steel frame LGS above the ceiling board C, the diagonal slots 111b provided in the top panel 111 are used. When the sensor base 1 is positioned on the underside of the ceiling board C and mounting pins are pushed into the multiple diagonal slots 111b, the multiple mounting pins penetrate the ceiling board C, spreading from the inside below the top panel 111 to the outside above. In this way, the sensor base 1 is temporarily installed on the ceiling board C, and then the P-type fire detector main unit PS is attached to the sensor base 1. When the mounting pins are inserted, small holes are created in the ceiling board C, but they are small and inconspicuous, so there is no need to replace the ceiling board C. Note that these small holes are not "holes" as defined in this application, because they are large enough to require the replacement of the ceiling board C and are not noticeable.

[0020] The detector base 1 of Example 1 can be fitted with a P-type fire detector main body PS and record information from the P-type fire detector main body PS. Figure 4 shows a sequential diagram of a temporary installation for installation testing, with the P-type fire detector main body PS attached to the detector base 1 of Example 1. The P-type fire detector main body PS, together with the detector base B, constitute a smoke detector. The "environmental noise" on the left side of Figure 4 indicates environmental noise that causes the P-type fire detector main body PS to detect smoke above a predetermined concentration, with the diagonal lines indicating the presence of environmental noise. Environmental noise is caused by condensation, electromagnetic waves, dust blown by the air conditioner, etc. Air conditioners can accumulate dust if not used for a while. When the air conditioner is first used, dust can fly around and enter the smoke detector, potentially causing a false fire alarm.

[0021] The detector base 1 supplies voltage to the blade receiving bracket 16 from the detector interface 14 via the detector connection line 172. The P-type fire detector main body PS receives the voltage from the blade receiving bracket 16 at the blade, converts it into power, and performs fire monitoring by detecting smoke. In FIG. 4, the P-type fire detector main body PS detects smoke above a predetermined concentration due to environmental noise (step S1). The P-type fire detector main body PS then turns on the confirmation light PSL (step S2). The P-type fire detector main body PS then sets the blade receiving bracket voltage to low and transmits a smoke detection signal (step S3). The detector base 1 monitors the voltage of the blade receiving bracket 16 via the detector interface 14, and several seconds after the voltage goes low, it disconnects the supply voltage and then reconnects it (step S4). This operation corresponds to the accumulation operation performed by a fire receiver that is connected when a P-type fire detector is installed after temporary installation is completed and a hole is drilled in a ceiling panel C or the like.

[0022] When the supply voltage is restored, the P-type fire detector main body PS restarts and turns off the confirmation light PSL (step S5). As shown in Fig. 4, if environmental noise continues after step S5, smoke of a predetermined concentration or higher is detected (step S6), and the confirmation light PSL is turned on (step S7). Then, the cutting tool voltage is set to Low, thereby transmitting a smoke occurrence signal (step S8).

[0023] The detector base 1 determines that there is a fire when a second low voltage occurs within a predetermined time after the first low voltage, and records the time of the fire determination on the memory card M using the card writer 15, which is a recording device (step S9). Then, five minutes after recording, the supply voltage is cut off and then reconnected (step S10). This operation corresponds to the recovery operation performed in a fire receiver that is connected when a P-type fire detector is installed by drilling a hole in a ceiling panel C or the like after temporary installation is completed.

[0024] The P-type fire detector main body PS is restarted and the confirmation light PSL is turned off (step S11). In the sequential flow shown in Fig. 4, since there is no environmental noise at the time of step S11, the P-type fire detector main body PS continues fire detection operation, but if there is environmental noise or if environmental noise occurs, the process returns to step S1 again.

[0025] By collecting the memory card M after the test period has ended, the installer can obtain information on the fire detection status and the time of fire detection as data. This data allows the installer to determine whether the temporary installation location is appropriate. If the installation location is determined to be inappropriate based on the data, the installer can infer the cause from the data, temporarily install the device in another location that is unlikely to have environmental noise, and then conduct an installation test. Furthermore, if the installer determines that the type of fire detector is inappropriate, the installer can change the type of fire detector, temporarily install it, and then conduct an installation test.

[0026] Once the installation location of the fire detector has been determined through installation testing, the P-type fire detector main body PS is removed from the detector base 1, with the detector base 1 left temporarily installed. Then, the marked hole 111a is traced with a pencil or similar to make a mark for hole H on the ceiling board C. After removing the detector base 1, hole H is drilled using the mark, and then the detector base B is fixed to the ceiling board C, and the P-type fire detector main body PS is attached and operation begins. The marked hole 111a is configured for the hole drilling mark. An ink discharge mechanism for making the mark can also be considered as a configuration for the hole drilling mark. [Example]

[0027] The detector base 1 in Example 1 is for a P-type fire detector main body PS, while the detector base 2 in Example 2 is for an R-type fire detector main body RS. The R-type fire detector main body RS can be attached to the detector base 2 to record information from the R-type fire detector main body RS. The detector base 2 is also used for installation tests. Although the configuration of the detector base 2 in Example 2 is not shown, it has the same configuration as the detector base 1 shown in Figure 2, including a configuration that allows installation without drilling holes H in the installation location, but its program and operation are different. And, like the detector base 1 and P-type fire detector main body PS shown in Figure 3, it can be temporarily installed below a ceiling panel C, etc.

[0028] FIG. 5 shows a sequential diagram of a temporary installation of the R-type fire detector main unit RS attached to the detector base 2 in Example 2. The R-type fire detector main unit RS, together with the detector base, constitutes a smoke detector. The "environmental noise" on the left side of FIG. 5 indicates environmental noise that the R-type fire detector main unit RS detects as smoke, and the diagonal lines indicate the presence of environmental noise. Environmental noise is caused by condensation, electromagnetic waves, dust blown by the air conditioner, etc. Air conditioners can accumulate dust if not used for a while. When the air conditioner is first used, dust can fly around and enter the smoke detector, potentially causing a false fire alarm.

[0029] The detector base 2 supplies voltage to the R-type fire detector main body RS in the same way that the detector base 1 in Example 1 supplies voltage to the P-type fire detector main body PS. The R-type fire detector main body RS performs smoke detection using the voltage supplied from the detector base 2. The R-type fire detector main body RS continues to transmit smoke density data to the detector base 2, as shown by the dotted arrow in Figure 5.

[0030] The detector base 2 determines whether there is a fire based on the received smoke density data. This determination is similar to that made by the R-type fire receiver that is connected when an R-type fire detector is installed by drilling a hole in a ceiling panel C or the like after temporary installation is completed. When the detector base 2 determines there is a fire (step S21), it sends a fire determination signal to the R-type fire detector main unit RS (step S22). Then, it records the smoke density data for the three minutes before the fire determination and the time of the fire determination on the memory card M (step S24).

[0031] Upon receiving the fire determination signal in step S22, the R-type fire detector main body RS turns on the confirmation light (step S23).

[0032] The detector base 2 transmits a recovery signal five minutes after the smoke density data falls below the threshold (step S25).

[0033] Upon receiving the restoration signal, the R-type fire detector main body RS turns off the confirmation light (step S26).

[0034] By retrieving the memory card M after the test period has ended, the installer can obtain the fire detection status, the time of the fire detection, and smoke density data for the three minutes prior to the fire detection. This information allows the installer to determine whether the installation location of the R-type fire detector RS is appropriate. If the installer determines from the information that the installation location or type of fire detector is inappropriate, they can infer the cause from the time of fire detection, etc., and temporarily install the detector in another location where there is likely to be no environmental noise, and then conduct an installation test. If the installer determines that the type of fire detector is inappropriate, they can change the type of fire detector, temporarily install it, and then conduct an installation test.

[0035] In the second embodiment, smoke density data for three minutes before a fire determination and information on the time of the fire determination were recorded on the memory card M. However, smoke density data at each time may be continuously recorded on the memory card M. In this case, a fire determination may be performed and added to the information, but a fire determination need not be performed. Furthermore, the R-type fire detector main body RS may be configured as a heat detector, and information such as temperature data may be recorded on the memory card M. [Example]

[0036] Figure 6 shows the detector base 3 in Example 3. The detector base 3 is also used in installation tests. Figure 6(a) is a view of the detector base 3 from the side where the P-type fire detector main body PS is attached. When the detector base 3 is installed on a ceiling panel C, it is viewed from below. Figure 6(b) is a side view showing the detector base 3 installed on the ceiling panel C in the vertical direction. As shown in Figures 6(a) and 6(b), the detector base 3 includes a housing 31, a control unit 32, a battery 33, a detector interface 34, a card writer 35, a blade receiving bracket 36, a power line 371, a detector connection line 372, a data line 373, an adhesive portion 38, a sensor interface 39, and an environmental sensor 41. The environmental sensor 41 is located in a sensor chamber 40. The control unit 32 includes a CPU and memory. The blade receiving bracket 36 engages with the blade (not shown) of the P-type fire detector main body PS.

[0037] The housing 31 has a shape in which the top surface of a cylinder is closed in the vertical direction when installed on the ceiling board C. The housing 31 has a disk-shaped top plate 311 on the top surface and a cylindrical wall 312 extending downward from the edge of the top plate 311. The part of the cylindrical wall 312 that corresponds to the sensor chamber 40 is made of a breathable mesh cover 42.

[0038] As shown in FIG. 6(a), the sensor base 3 accommodates a control unit 32, a battery 33, a sensor interface 34, a card writer 35, a blade receiving bracket 36, a power line 371, a sensor connection line 372, a data line 373, a sensor interface 39, and an environmental sensor 41 inside a housing 31. The environmental sensor 41 in the third embodiment is a temperature sensor. These components are fixed to a top panel 311. The card writer 35 is connected to a cylindrical wall 312, and as shown in FIGS. 6(a) and 6(b), the outside of the portion of the cylindrical wall 312 where the card writer 35 is connected is flat. In addition, an adhesive portion 38 made of a disc-shaped adhesive tape is provided on the top surface of the housing 31. A memory card M is inserted into the card writer 35 of the recording device shown in FIG. 6 from the outside of the housing 31.

[0039] In the detector base 3, the battery 33 supplies power to the control unit 32, detector interface 34, card writer 35, and sensor interface 39 via a power line 371. The control unit 32 is also connected to the detector interface 34, card writer 35, and sensor interface 39 via a data line 373. The two blade holders 36 are detachably connected to blade holders (not shown) of the P-type fire detector main body PS. The detector interface 34 connects between the two blade holders 36 via a detector connection line 372, and supplies power to the P-type fire detector main body PS and transmits and receives data thereto. The sensor interface 39 is connected to an environmental sensor 41 and sends environmental data, which is temperature data measured by the environmental sensor 41, to the control unit 32.

[0040] FIG. 7 is a side view showing the state in which the P-type fire detector main body PS is attached to the detector base 3 of the third embodiment and temporarily installed on the underside of a ceiling board C. The ceiling board C is shown in cross section. The P-type fire detector main body PS is fixed by attaching the cutting edge fitting to the cutting edge receiving fitting 36 of the detector base 3. The P-type fire detector main body PS is equipped with a confirmation light PSL. The detector base 1 with the P-type fire detector main body PS attached can then be temporarily attached to the underside of the ceiling board C using the adhesive portion 38 for temporary installation. This means that installation is possible without drilling a hole H in the ceiling board C, and the installation position of the P-type fire detector main body PS can be easily changed.

[0041] The detector base 3 of the third embodiment can be fitted with a P-type fire detector main body PS, and information from the P-type fire detector main body PS can be recorded on a memory card M by a card writer 35, which is a recording device. The detector base 3 also records environmental data acquired by an environmental sensor 41 provided in the detector base 3 as information on the memory card M by the card writer 35, which is a recording device.

[0042] By collecting the memory card M after the test period has ended, the installer can determine whether the temporary installation location is appropriate. If the installer determines that the installation location is inappropriate based on the data, they can infer the cause from the data, temporarily install the fire detector in another location that is unlikely to have environmental noise, and then conduct an installation test. Also, if the installer determines that the type of fire detector is inappropriate, they can change the type of fire detector, temporarily install it, and then conduct an installation test.

[0043] Although the environmental sensor 41 in the third embodiment is a temperature sensor, other environmental sensors may be used. Furthermore, environmental data may be acquired by a plurality of types of environmental sensors and recorded on the memory card M.

[0044] In the first to third embodiments, the information is recorded on the memory card M and then retrieved. However, the information may be recorded in the memory of the control unit, and retrieved by wire or wirelessly when the detector base is recovered, or the information may be transmitted wirelessly at any time.

[0045] The detector bases 1 to 3 in Examples 1 to 3 may be compatible with fire detectors other than smoke detectors, such as heat detectors. The detector bases 1 and 3 in Examples 1 and 3 are compatible with P-type fire detectors, and the detector base 2 in Example 2 is compatible with R-type fire detectors. These detector bases can also be integrated to form a detector base that is switchable between P-type and R-type fire detectors. In any case, the detector base of the present invention allows a fire detector to be temporarily installed and an installation test to be performed without drilling a hole H at the installation location.

[0046] As a configuration that allows installation without drilling a hole H at the installation location, the magnet 18 and the oblique pore 111b are used in Example 1, and the adhesive portion 38 is used in Example 3. The configuration that allows installation in Example 2 is the same as in Example 1. Two or all of the magnet, pore, and adhesive portion may be used in combination to install the device at the installation location.

[0047] Furthermore, the specific configuration is not limited to the embodiments, and the present invention includes design changes within the scope of the gist of the present invention. Furthermore, the above-mentioned examples and modifications 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]

[0048] C Ceiling panel, H Hole, M Memory card, PS P-type fire detector body, PSL Check light, RS R-type fire detector body, B Detector base, L Wiring, LGS Lightweight steel frame base, 1 detector base, 11 housing, 111 upper surface plate, 111a marking hole, 111b oblique hole, 112 cylindrical wall, 12 control unit, 13 battery, 14 detector interface, 15 card writer, 16 blade receiving bracket, 171 power line, 172 detector connection line, 173 data line, 18 magnet, 2 detector base, 3 Sensor base, 31 Housing, 311 Top panel, 312 Cylindrical wall, 32 Control unit, 33 Battery, 34 Sensor interface, 35 Card writer, 36 Blade receiving bracket, 371 Power line, 372 Sensor connection line, 373 Data line, 38 Adhesive part, 39 Sensor interface, 40 Sensor chamber, 41 Environmental sensor, 42 Mesh cover

Claims

1. The fire detector has a blade receiving metal fitting that engages with the blade metal fitting of the fire detector body, It has a battery that supplies power to the fire detector body, It can be installed without drilling holes in the installation location. Used for installation testing, A sensor base characterized by:

2. A recording device is provided, The recording device records information from the fire detector body.

2. A sensor base according to claim 1.

3. Equipped with environmental sensors, The recording device records the environmental data detected by the environmental sensor.

3. A sensor base according to claim 2.

4. Equipped with a magnet, 4. The sensor base according to claim 1, wherein the sensor base is temporarily installed at the installation location by the magnet.

5. Equipped with an adhesive part, The adhesive portion is used to temporarily install the device at the installation location.

4. A sensor base according to any one of claims 1 to 3.

6. having a punch marking configuration; A sensor base according to any one of claims 1 to 3, characterized in that it comprises:

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