Adapter case and fire alarm system installation method

Abstract

To provide an adapter case housing an adapter device which can improve disaster prevention property, and provide a construction method of a fire warning installation using the same.SOLUTION: An incombustible adapter case 4 is installed on an installation surface 901 facing a monitoring target region, and houses a relay device embedded into a back side of the installation surface 901 in accordance with a sensor 1 detecting fire in the monitoring target region so as to nealy cover the exterior of the relay device and protects it. The adapter case is so sized as to insert an opening that is penetrated to the back side of the installation surface 901 from the installation surface 901 and has an outer diameter smaller than an outer diameter of the sensor 1. Also, a base 2 is attached to the adapter case 4, and the adapter case 4 in a state where the base 2 is attached is attached to the back side of the installation surface 901 from the monitoring target region side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adapter case and a method for installing a fire alarm system. [Background technology]

[0002] BACKGROUND ART Conventionally, fire detectors that are installed on the ceiling or the like of a monitored area to detect fires in the monitored area have been known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-126700 Summary of the Invention [Problem to be solved by the invention]

[0004] In the past, for example, an adapter device that has a function of relaying signal communication between a fire detector of a fire alarm system and another device (for example, a fire receiver) was installed and used together with the fire detector. There was a demand for technology to prevent the adapter device from being damaged by a fire and causing malfunction, etc.

[0005] The present invention has been made in consideration of the above problems, and aims to provide an adapter case for accommodating an adapter device, which can improve disaster prevention capabilities, and a method for installing fire alarm equipment using the same. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the adapter case described in claim 1 is an adapter case that is installed via a base on an installation surface facing a monitored area, and is embedded on the back side of the installation surface opposite to the monitored area in correspondence with a fire detector that is exposed together with the base from the installation surface toward the monitored area and detects fires in the monitored area, and that houses and protects an exterior of an adapter device that is connected to the fire detector so as to cover the exterior of the adapter case, and the adapter case is sized to be able to pass through an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than the outer diameters of the base and the fire detector. The adapter case is non-flammable. . The adapter case according to claim 2 is the adapter case according to claim 1, The adapter device is a repeater that repeats signal communication between the fire detector and the fire receiver.

[0007] Also, claims 3 The installation method of the fire alarm system described in is an installation method of a fire alarm system including a fire detector that is installed on an installation surface facing a monitored area and detects fires in the monitored area, and includes the steps of: attaching a sensor base to an adapter case that houses and protects an exterior of an adapter device that is embedded on the back side of the installation surface in correspondence with the fire detector so as to substantially cover the exterior of the adapter device, the adapter case having a size that allows an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than an outer diameter of the fire detector to be inserted; attaching the adapter case with the sensor base attached to the back side of the installation surface from the monitored area side; and attaching the fire detector to the sensor base, wherein the fire detector is attached so as to be exposed from the installation surface to the monitored area side together with the sensor base. The adapter case is non-flammable. . The method for installing a fire alarm system according to claim 4 is also 3 In the installation method of the fire alarm system described in The adapter device is a repeater that repeats signal communication between the fire detector and the fire receiver. [Effects of the Invention]

[0008] The adapter case according to claim 1 and the 3According to the fire detector installation method described above, the problem of the present application can be solved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a diagram for explaining the installation state of the detector. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. 10 is a perspective view showing a state in which a relay is attached to a lower member of an adapter case. [Figure 16] 10 is a perspective view showing a state in which an upper member is attached to a lower member of the adapter case. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an adapter case and a fire detector installation method according to the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the preferred embodiments.

[0011] [Basic Concept of the Embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to an adapter case and a method for installing a fire detector.

[0012] The "adapter case" is a non-flammable case that houses and protects the adapter device. The "adapter device" is a device that corresponds to a fire detector and is buried behind the installation surface facing the monitored area, and is a concept that includes, for example, a repeater and any other device.

[0013] A "fire detector" is a device for detecting fires in a monitored area. A "monitored area" is an area monitored by a fire detector, and is a concept that includes any area, such as a room, a hallway, or a staircase. An "installation surface" is a surface on which a fire detector is installed, and is a concept that includes, for example, a ceiling or a surface on a wall that faces the monitored area.

[0014] "Non-flammable" is a concept indicating that something is difficult to burn, for example, a concept indicating that something is heat-resistant or fire-resistant.

[0015] In the following embodiments, the "adapter device" is a repeater and the "installation surface" is a ceiling surface. The "adapter device" is not limited to a repeater, but includes various devices that are arranged in correspondence with the fire detectors of the fire alarm system to provide the fire alarm system with ancillary or additional functions. The "adapter device" may also be a device that provides an interface function for linking with external devices or systems.

[0016] [Specific details of the embodiment] Next, specific details of the embodiment will be described.

[0017] (composition) First, the configuration of the adapter case etc. of this embodiment will be described. Fig. 1 is a diagram for explaining the installation state of the sensor, Fig. 2 is a perspective view of the adapter case etc., Fig. 3 is a front view of the adapter case etc., Fig. 4 is a side view of the adapter case etc., Fig. 5 is a plan view of the adapter case etc., Fig. 6 is a bottom view of the adapter case etc., and Fig. 7 is an exploded perspective view of the adapter case etc.

[0018] In Fig. 1, a cross-sectional view showing the installation state of the sensor 1 is shown, but for ease of explanation, some hatching has been omitted. Also, Figs. 2 to 6 show the adapter case 4 with the base 2 attached. Also, in each of the figures other than Fig. 1, the wiring 33 extending from the repeater 3 in Fig. 7 has been omitted.

[0019] 1 to 6, the X, Y and Z axes are assumed to be perpendicular to one another, the Z axis indicates the vertical direction, and the X and Y axes indicate the horizontal direction.

[0020] Here, for example, the sensor 1 in Fig. 1, the base 2, the repeater 3, the adapter case 4, and the engagement hook 5 in Fig. 7 will be described in that order. Note that, except for configurations that are specifically mentioned, known configurations can be applied to the sensor 1, the base 2, and the repeater 3, so only an outline will be described.

[0021] (Configuration-sensor) 1 is a fire detector that is installed on an installation surface 901 on a ceiling facing a monitored area and detects fires in the monitored area. Detector 1 is, for example, circular in plan view and has the same diameter as base 2 and a larger diameter than ceiling-side opening 902. Note that "plan view" refers to the state when viewed from the +Z direction toward the -Z direction in FIG. 1.

[0022] The "ceiling-side opening" 902 is an opening provided in the ceiling, and is an opening that penetrates from the monitored area to the area on the ceiling behind the monitored area (hereinafter also referred to as the "ceiling area"). The shape of the ceiling-side opening 902 is arbitrary, but in the example of Fig. 1, a case will be described where it is a circular opening with a predetermined diameter.

[0023] (Configuration-based) Fig. 8 is a perspective view of the base. The base 2 is used to install the sensor 1 on an installation surface 901. The base 2 is made of, for example, resin, is circular in plan view, and has a larger diameter than the ceiling-side opening 902. As shown in Fig. 8, the base 2 has, for example, a base-side engagement hole 21 and a base-side opening 22.

[0024] (Configuration - Base - Base side engagement hole) The base-side engagement hole 21 is used to attach the base 2 to the adapter case 4. The base-side engagement hole 21 has an internal structure that allows, for example, an engagement hook 5 (see FIGS. 13 and 14 described below) provided on the adapter case 4 to be inserted therein and engage with the engagement hook 5.

[0025] (Configuration - Base - Base side opening) The base-side opening 22 is a through opening provided in the bottom surface of the base 2, and is an opening through which the wiring 331 (FIG. 1) extending from the repeater 3 is inserted.

[0026] (Configuration - Repeater) 9 and 10 are perspective views of the repeater. The repeater 3 is an adapter device that is embedded on the back side of the installation surface 901 (FIG. 1) in correspondence with the detector 1. The repeater 3 is, for example, a device that relays signal communication between the detector 1 and a fire receiver (not shown), and is a device that has a switch or the like for disconnecting a short-circuited part in the event of a short circuit in the communication line (a so-called short-circuit disconnecting repeater). Note that the signal communication here is a concept that includes various types of communication, such as two-way communication or transmission communication.

[0027] The repeater 3 of this embodiment has an outer shape made of, for example, resin, more specifically, flame-retardant resin. As shown in Figures 9 and 10, the repeater 3 has a rectangular shape in plan view. As shown in Figures 9 and 10, the repeater 3 has, for example, a repeater-side engaging portion 31, a repeater-side contact portion 32, wiring 33 (Figure 1), and wiring hole 34.

[0028] (Configuration - Repeater - Repeater side engagement part) The repeater-side engaging portion 31 is used to attach the repeater 3 to the lower member 42 (FIG. 7) of the adapter case 4. The repeater-side engaging portion 31 is, for example, an engaging claw protruding from the bottom surface of the repeater 3 (the lower surface in FIGS. 9 and 10), and is configured to engage with a part of the lower member 42 from the inside of a case-side opening 423 (FIGS. 13 and 14, which will be described later) in the lower member 42 of the adapter case 4.

[0029] (Configuration - Repeater - Repeater side contact part) The repeater-side contact portion 32 is used to position the repeater 3 relative to the lower member 42 (FIG. 7) of the adapter case 4. The repeater-side contact portion 32 is, for example, a portion that protrudes from the bottom surface of the repeater 3, and is shorter in length than the repeater-side engagement portion 31. The repeater-side contact portion 32 is configured to come into contact with a case-side contact portion 422 (FIG. 13, described later) of the lower member 42 of the adapter case 4.

[0030] (Configuration - Repeater - Wiring and wiring hole) The wiring 33 (FIG. 1) is a communication line for electrically connecting the repeater 3 to other devices. One end of the wiring 33 is electrically connected to the internal circuit side of the repeater 3 through a wiring hole 34 shown in FIG. 10, and the other end of the wiring 33 is electrically connected to the other device side.

[0031] The number and connections of the wires 33 are arbitrary depending on the signal communication or wiring method to be applied, but for example, wires 331 to 333 are shown in the example of Fig. 1. Each of the wires 331 to 333 is, for example, a pair of wires, with wire 331 electrically connected to the detector 1 side, wire 332 electrically connected to a fire receiver side (not shown), and wire 333 electrically connected to another repeater side (not shown).

[0032] In the example of FIG. 1, the wirings 331 to 333 are illustrated, but for example, four sets of wirings may be provided including a spare wiring.

[0033] (Configuration - Adapter case) 11 and 12 are perspective views of the upper member, and FIGS. 13 and 14 are perspective views of the lower member. The adapter case 4 in FIGS. 1 to 6 is generally a non-flammable case that covers the exterior of the repeater 3 to house and protect the repeater 3, and is, for example, a metal case. The adapter case 4 has, for example, a shape or size that allows it to be inserted into the ceiling opening 902 (FIG. 1). As shown in FIG. 7, the adapter case 4 has, for example, an upper member 41 and a lower member 42.

[0034] (Configuration - Adapter case - Upper part) 11 and 12, the upper member 41 is a member that forms a hollow portion for accommodating the relay 3, and is made of metal. The upper member 41 has, for example, a case-side first engagement portion 411, a case-side slit portion 412, and a case-side notch portion 413.

[0035] (Configuration - adapter case - upper member - case side first engagement part, etc.) The case-side first engagement portion 411 is used to attach the upper member 41 to the lower member 42 of the adapter case 4. The case-side first engagement portion 411 is provided, for example, between the case-side slit portion 412 and the case-side notch portion 413, and is a protruding piece that protrudes toward the side opposite to the top surface of the upper member 41 (the surface on the upper side in FIG. 11), and has a hole at its tip that engages with the case-side second engagement portion 421 (FIG. 14) of the lower member 42.

[0036] Case-side slit 412 is a gap provided along case-side first engagement portion 411. Case-side first engagement portion 411 is separated from other portions of upper member 41 via case-side slit 412, so when attaching upper member 41 to lower member 42, case-side first engagement portion 411 can be elastically deformed, making attachment easy.

[0037] The case side notch 413 is a U-shaped cutout portion to form a through hole 43 (see FIG. 16 described later) through which the wiring 33 (in the example of FIG. 1, wiring 332 and wiring 333) from the repeater 3 housed in the adapter case 4 is inserted.

[0038] (Configuration - Adapter case - Lower part) 13 and 14, the lower member 42 is, for example, a member that forms the bottom of the hollow portion in the upper member 41, and is a flat metal member. The lower member 42 has, for example, a case-side second engagement portion 421, a case-side abutment portion 422, and a case-side opening 423.

[0039] (Configuration - adapter case - lower member - case side second engagement part, etc.) The case-side second engagement portion 421 is used to attach the upper member 41 of the adapter case 4 to the lower member 42. The case-side second engagement portion 421 is, for example, a protrusion provided on the outer periphery of the lower member 42, and engages with a hole provided on the tip side of the case-side first engagement portion 411 in the upper member 41.

[0040] The case-side contact portion 422 is used to position the repeater 3 relative to the lower member 42 (FIG. 7) of the adapter case 4. As shown in FIG. 13, the case-side contact portion 422 is bent downward and protrudes in the opposite direction (upper side in FIG. 13) to the direction in which the engagement hook 5 protrudes (lower side in FIG. 13), and is configured to abut against the repeater-side contact portion 32 (FIG. 9) of the repeater 3.

[0041] The case-side opening 423 is an opening that is provided in the lower member 42 and penetrates the lower member 42, and is an opening through which the wiring 331 (FIG. 1) extending from the repeater 3 is inserted.

[0042] (Configuration - Engagement Hook) 13 and 14 is used to attach the adapter case 4 to the base 2. The engagement hook 5 is, for example, a resin hook that is detachably attached to a through-hole provided at a predetermined position in the lower member 42 of the adapter case 4, and as shown in FIG. 7, it protrudes in the direction opposite to the upper member 41 (toward the bottom of the drawing in FIG. 7). The engagement hook 5 is configured to be inserted into, for example, the base-side engagement hole 21 shown in FIG. 8, and to engage with a part of the base 2 inside the base-side engagement hole 21.

[0043] The configuration of the engagement hook 5 is arbitrary as long as it allows the adapter case 4 to be attached to the base 2, and for example, as described here, it may be configured as a separate part from the lower member 42 of the adapter case 4, or it may be configured as an integrated part of the lower member 42. Also, instead of or together with the engagement hook 5, the adapter case 4 may be configured to be attached to the base 2 using other components (for example, a mounting member formed by a die-cast method or a wire spring mounting member, etc.).

[0044] (Construction method) Next, we will explain how to install the sensor 1 using the adapter case 4 and other components configured in this way. Figure 15 is a perspective view showing the state in which the repeater is attached to the lower member of the adapter case, and Figure 16 is a perspective view showing the state in which the upper member is attached to the lower member of the adapter case. Note that (a) and (b) in these figures show the state as seen from different directions.

[0045] Here, for example, a construction method will be described for attaching a sensor 1 to a position corresponding to a ceiling-side opening 902 on an installation surface 901 as shown in Fig. 1 when one end of a wiring 33 of a predetermined length (for example, 20 cm to 30 cm) is connected in advance to the repeater 3 of Fig. 9 and Fig. 10. Note that only procedures related to the features of the present application will be described here.

[0046] (Installation method - Wiring connection steps) First, the wiring 33 extending from the repeater 3 is electrically connected to wiring (not shown) provided in the ceiling space. Specifically, the wiring 332 is connected to wiring electrically connected to a fire control panel (not shown), and the wiring 333 is connected to wiring electrically connected to another repeater (not shown).

[0047] (Installation method - Wiring arrangement steps) Next, in the repeater 3 of Fig. 10, the wirings 331 to 333 extending from the wiring hole 34 are arranged. Specifically, the wiring 331 is arranged so that it extends downward (toward the bottom of the drawing in Fig. 10) of the repeater 3, and the wirings 332 and 333 are arranged so that they extend toward the side of the repeater 3 (the left-right direction of the drawing in Fig. 10, which is perpendicular to the direction in which the wiring 331 extends). The wirings 332 and 333 are arranged so that they pass adjacent to each of the two repeater-side contact portions 32 and extend in opposite directions to each other.

[0048] (Installation method - Engagement hook installation steps) Next, the engaging hook 5 is attached to the lower member 42 of the adapter case 4 of Fig. 13. Specifically, the engaging hook 5 is attached by inserting it through the attachment hole of the lower member 42.

[0049] (Installation method - Repeater installation steps) Next, the repeater 3 is attached to the lower member 42 of the adapter case 4 of Fig. 13. Specifically, as shown in Fig. 15(a) and (b), the repeater-side engaging portion 31 is engaged with the inner edge of the case-side opening 423, thereby attaching the repeater 3 to the lower member 42. In this case, as shown in Fig. 15(a), the repeater-side abutting portion 32 and the case-side abutting portion 422 abut against each other, thereby positioning the repeater 3 with respect to the lower member 42.

[0050] In this case, the wiring 331 arranged to extend below the relay 3 is inserted through the case-side opening 423 .

[0051] (Installation method - Upper component installation step) Next, the upper member 41 in Fig. 11 is attached to the lower member 42 in Fig. 15(a) and (b). Specifically, the case-side second engaging portion 421 (Fig. 14) is fitted into and engaged with a hole provided on the tip side of the case-side first engaging portion 411 (Fig. 12), thereby attaching the upper member 41 to the lower member 42 as shown in Fig. 16(a) and (b).

[0052] In this case, through holes 43 (FIG. 16(b)) are formed at positions corresponding to the case-side notches 413 (FIG. 12). The wiring 332 and wiring 333 arranged to extend to the sides of the repeater 3 are inserted into the two through holes 43, respectively.

[0053] (Installation method - Steps for attaching the base to the adapter case) Next, the base 2 of Fig. 8 is attached to the adapter case 4 of Fig. 16(a) and (b). Specifically, the engagement hooks 5 attached to the lower member 42 of the adapter case 4 are inserted into the base-side engagement holes 21 and engaged with parts of the base 2 inside the base-side engagement holes 21, thereby attaching the base 2 to the adapter case 4 as shown in Figs. 2 to 6.

[0054] In this case, the wiring 331 arranged to extend below the repeater 3 is inserted through the base side opening 22 (FIG. 8) in addition to the case side opening 423 (FIG. 16(b)).

[0055] (Installation method - Steps for attaching the base to the installation surface) Next, the base 2 to which the adapter case 4 is attached is attached to the ceiling installation surface 901. Specifically, the adapter case 4 of Figures 2 to 6 is embedded into the ceiling space from the monitored area side through the ceiling opening 902 as shown in Figure 1, and then the base 2 is attached to the ceiling installation surface 901 using a predetermined installation method (for example, a method of attachment using installation screws, etc.).

[0056] (Installation method - detector installation steps) Next, as shown in Fig. 1, the wiring 331 inserted through the case-side opening 423 (Fig. 16(b)) and the base-side opening 22 (Fig. 8) is electrically connected to the sensor 1, and the sensor 1 is then attached to the base 2 using a predetermined attachment method (for example, an attachment method that utilizes engagement structures provided on the mutually opposing surfaces of the sensor 1 and the base 2). This completes the installation of the sensor 1.

[0057] (Effects of the embodiment) As described above, according to this embodiment, since adapter case 4 that houses repeater 3 is nonflammable, it is possible to prevent repeater 3 itself from causing a fire, for example, thereby improving disaster prevention capabilities. Also, since adapter case 4 is sized to be able to be inserted through ceiling-side opening 902 that penetrates to the back side of installation surface 901, it is possible to install adapter case 4 from the side of the monitored area, for example, thereby improving workability.

[0058] [Modifications to the embodiment] Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0059] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment of the invention and the details of the configuration, and may solve only some of the problems described above or achieve only some of the effects described above.

[0060] (Regarding decentralization and integration) Furthermore, the above-described configuration is a functional concept, and does not necessarily have to be physically configured as shown in the drawings. In other words, the specific form of distribution or integration of each part is not limited to that shown in the drawings, and all or part of it can be functionally or physically distributed or integrated in any unit.

[0061] (About the adapter case (part 1)) Furthermore, in the above embodiment, the adapter case 4 is made of metal, but the present invention is not limited to this and the adapter case 4 may be made of a non-combustible material other than metal.

[0062] (About the adapter case (part 2)) Furthermore, a waterproof or drip-proof structure may be adopted for the adapter case 4 of the above embodiment. Specifically, for example, a sealant having a waterproof or drip-proof function may be provided at the portion where the upper member 41 and the lower member 42 abut against each other, or the case-side opening 423 and the through-hole 43 in Fig. 16(b) may be sealed with a sealant with the wiring 331 to 333 inserted therethrough.

[0063] (About the bass) In the above embodiment, the sensor 1 is attached using the base 2 as shown in Fig. 1, but this is not limiting. For example, the sensor 1 may be configured to be attached directly to the installation surface 901, with the base 2 omitted. In such a configuration, for example, the adapter case 4 shown in Fig. 16(a) and (b) may be configured to be attached directly to the sensor 1.

[0064] (Features) Furthermore, the configurations of the above-described embodiments and the features of the modifications may be combined in any manner.

[0065] (Addendum) The adapter case of Appendix 1 is a non-flammable adapter case that is installed on an installation surface facing a monitored area and that houses and protects the exterior of an adapter device that is embedded on the back side of the installation surface in correspondence with a fire detector that detects fires in the monitored area, so as to cover the exterior of the adapter device, and the adapter case is sized to be able to pass through an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than the outer diameter of the fire detector.

[0066] The installation method for a fire alarm system including a fire detector of Appendix 2 is a method for installing a fire alarm system including a fire detector that is installed on an installation surface facing a monitored area and detects fires in the monitored area, and includes the steps of: attaching a detector base to a non-flammable adapter case that houses and protects the exterior of an adapter device that is embedded on the back side of the installation surface in correspondence with the fire detector, so as to substantially cover the exterior of the adapter device, the adapter case being sized so that an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than the outer diameter of the fire detector can be inserted; attaching the adapter case with the detector base attached to the back side of the installation surface from the monitored area side; and attaching the fire detector to the detector base.

[0067] (Effect of supplementary notes) According to the adapter case described in Supplementary Note 1 and the fire detector installation method described in Supplementary Note 2, the adapter case that houses the adapter device is non-flammable, which, for example, improves the fire resistance of the adapter device and protects the adapter device from the heat associated with a fire, allowing the adapter device to function reliably even in the event of a fire and improving disaster prevention capabilities. Furthermore, because the adapter case is sized to be able to be inserted through an opening that penetrates to the back side of the installation surface, for example, the adapter case can be installed from the side of the monitored area, improving installation ease. [Explanation of symbols]

[0068] 1 sensor 2. Bass 3 Repeater 4 Adapter Case 5 Engagement Hook 21 Base side engagement hole 22 Base side opening 31 Repeater side engagement part 32 Repeater side contact part 33 Wiring 34 Wiring hole 41 Upper member 42 Lower part 43 Through hole 331 Wiring 332 Wiring 333 Wiring 411 Case side first engagement portion 412 Case side slit 413 Case side notch 421 Case side second engagement portion 422 Case side contact part 423 Case side opening 901 Installation surface 902 Ceiling opening

Claims

1. an adapter case that accommodates and protects an exterior of an adapter device that is installed via a base on an installation surface facing a monitored area, and that is embedded on the back side of the installation surface on the opposite side to the monitored area, corresponding to a fire detector that is installed via a base on an installation surface facing a monitored area and that is exposed together with the base from the installation surface toward the monitored area to detect fires in the monitored area, and that is connected to the fire detector, the adapter case has a size that allows it to be inserted through an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than outer diameters of the base and the fire detector, The adapter case is non-flammable. Adapter case.

2. The adapter device is a repeater that relays signal communication between the fire detector and the fire receiver. The adapter case according to claim 1 .

3. 1. A method for installing a fire alarm system including a fire detector that is installed on an installation surface facing a monitored area and detects a fire in the monitored area, comprising: a step of attaching a detector base to an adapter case that accommodates and protects an exterior of an adapter device that is embedded in the back side of the installation surface in correspondence with the fire detector, so as to substantially cover the exterior of the adapter case, the adapter case being sized to be able to pass through an opening that penetrates from the installation surface to the back side of the installation surface and has an outer diameter smaller than an outer diameter of the fire detector; attaching the adapter case with the sensor base attached to the rear side of the installation surface from the monitored area side; and mounting the fire detector to the detector base; the fire detector is attached so as to be exposed from the installation surface to the monitored area together with the detector base, The adapter case is non-flammable. How to install fire alarm systems.

4. The adapter device is a repeater that relays signal communication between the fire detector and the fire receiver. A method for installing a fire alarm system according to claim 3.

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