Fire detector and detector body transport device

Abstract

The present invention aims to provide a fire detector and a detector body transport device that allows the detector body of the fire detector to be easily attached to and detached from the detector base using a relatively small attachment / detachment device. [Solution] The fire detector of the present invention comprises a detector base and a detector body detachably attached to the detector base, wherein the detector base has a base portion, a first slide mounting portion, and a power transmission portion that transmits power by wireless power supply, wherein the detector body has a main body portion, a second slide mounting portion provided on the upper part of the main body portion, and a power receiving portion that receives power by wireless power supply, wherein when the detector body is attached to the detector base by moving the second slide mounting portion horizontally and engaging it with the first slide mounting portion, the detector body is in a predetermined position on the detector base and power supply from the detector base to the detector body begins.

Description

Technical Field

[0004] , , , , , , , , , ,

[0001] The present invention relates to a fire detector and a detector body carrier device.

Background Art

[0002] Many fire detectors are formed by a detector base fixed to a ceiling or the like and a detector body attached to the detector base. In such a fire detector, it is easy to perform inspections or replace the detector body by removing it from the detector base. The detector body of Patent Document 1 has a blade fitting and a contact spring, and the detector base has a blade receiving fitting. Then, by pressing the detector body against the detector base fixed to the ceiling or the like and rotating it, the blade fitting - contact spring and the blade receiving fitting engage, and the detector body is attached to the detector base. Also, by rotating the detector body in the reverse direction, the detector body can be removed from the detector base.

[0003] Thus, when removing or attaching the detector body, it is necessary for an operator to hold the detector body by hand. Therefore, when inspecting or replacing a detector body installed at a high place, it was necessary to set up a scaffold for the work. In recent years, for high - altitude fire detectors, in order to remove or attach the detector body, it has been considered to use a drone such as a multicopter (Patent Document 2). In Patent Document 2, the drone raises the attaching / detaching device below the detector base, couples by sandwiching the detector base with the coupling part of the attaching / detaching device, and rotates the coupling part to attach / detach the detector body to / from the detector base.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] The attachment / detachment device described in Patent Document 2 has a complex structure because it clamps the sensor base at the coupling part, and also requires a mechanism to generate clamping force and rotational force for the sensor body. As a result, the attachment / detachment device is large, and attaching and detaching the sensor body is difficult.

[0006] The present invention aims to provide a fire detector and a detector body transport device that allows the detector body of the fire detector to be easily attached to and detached from the detector base using a relatively small attachment / detachment device. [Means for solving the problem]

[0007] A fire detector according to one embodiment of the present invention comprises a detector base and a detector body detachably attached to the detector base, wherein the detector base has a base portion, a first slide mounting portion, and a power transmission portion for transmitting power by wireless power supply, wherein the detector body has a main body portion, a second slide mounting portion provided on the upper part of the main body portion, and a power receiving portion for receiving power by wireless power supply, wherein when the detector body is attached to the detector base by moving the second slide mounting portion horizontally and engaging it with the first slide mounting portion, the detector body is in a predetermined position on the detector base and power supply from the detector base to the detector body begins. [Effects of the Invention]

[0008] The present invention provides a fire detector and a detector body transport device that allows the detector body of the fire detector to be easily attached to and detached from the detector base using a relatively small attachment / detachment device. [Brief explanation of the drawing]

[0009] [Figure 1] A diagram showing the detector base in the fire detector of Example 1. [Figure 2] A diagram showing the detector body in the fire detector of Example 1. [Figure 3] Side view of the fire detector in Example 1. [Figure 4] Side view of the drone used to attach the sensor unit to the sensor base. [Figure 5] A side view showing the sensor body being attached to the sensor base by a drone in Example 1. [Figure 6] A diagram showing the detector base in the fire detector of Example 2. [Figure 7] A diagram showing the detector body in the fire detector of Example 2. [Figure 8] Side view of the fire detector in Example 2. [Figure 9] A side view showing the situation in which the sensor body is attached to the sensor base by a drone in Example 2. [Figure 10] A diagram showing the detector base in the fire detector of Example 3. [Figure 11] A diagram showing the detector body in the fire detector of Example 3. [Figure 12] A top view showing the power transmission and power reception sections of Example 3. [Figure 13] A top view showing a modified example of the power transmission and power reception sections of Example 3. [Modes for carrying out the invention]

[0010] The following describes an embodiment in which a fire detector is mounted on a horizontal ceiling panel, and the directional relationships, such as vertical, are described as if it were mounted on a horizontal ceiling panel. However, the fire detector may also be mounted on a sloped ceiling or wall. When mounted on a sloped ceiling or wall, the directional relationships will be in accordance with the sloped ceiling or wall. As long as the configuration involves mounting the detector body to a detector base, it can be various types of fire detection detectors, such as smoke detectors, heat detectors, or flame detectors. The fire detector detects smoke, heat, flames, etc., and transmits the detection information to the fire alarm receiver. [Examples]

[0011] FIG. 1 shows the sensor base 11 in the fire detector 1 of Example 1. FIG. 1(a) is a side view when the sensor base 11 is fixed to the ceiling board C, and FIG. 1(b) is a bottom view. FIG. 1(b) is a view seen from the direction of the arrow in FIG. 1(a), and FIG. 1(a) is a view seen from the direction of the arrow in FIG. 1(b). In FIG. 1(a), the ceiling board C is shown in cross section.

[0012] The sensor base 11 is provided with a support portion 112 at a distance below the base portion 111, and the space between the base portion 111 and the support portion 112 is connected by a first connection portion 113. In Example 1, the support portion 112 is a horizontal plate, and the first connection portion 113 is a side wall provided on the outer periphery of the sensor base 11. The support portion 112 and the first connection portion 113 form a first slide mounting portion 11s.

[0013] The support portion 112 has a horizontal upper surface 112a, a horizontal lower surface 112b below the upper surface 112a, and a vertical side surface 112c between the upper surface 112a and the lower surface 112b. The side surface 112c is a convex curved surface that opens toward the access side E as shown in FIG. 1(b). In FIG. 1(b), the base portion 111 not covered by the support portion 112 is shown in the shaded area. Also, in FIG. 1(a), the side surface 112c is shown by vertical lines.

[0014] Two locations near the side surface 112c on the upper surface 112a of the support portion 112 are recessed to form recesses 112d. Further, in the base portion 111, near the inside close to the access side E, a power transmission portion 114 for power transmission by wireless power supply is provided. The power transmission portion 114 is formed of a coil. The dotted line indicates a configuration hidden inside or the like. A sensor 115 is provided on the lower surface of the base portion 111. The sensor 115 detects that the detected object 125 described later is close.

[0015] FIG. 2 shows the sensor main body 12 in the fire detector 1 of Example 1. FIG. 2(a) is a side view, and FIG. 2(b) is a top view. FIG. 2(b) is a view seen from the direction of the arrow in FIG. 2(a), and FIG. 2(a) is a view seen from the direction of the arrow in FIG. 2(b). The sensor main body 12 is detachably attached to the sensor base 11.

[0016] In the sensor body 12, a supported portion 122 is provided above the main body portion 121 at a distance, and the main body portion 121 and the supported portion 122 are connected by a second connecting portion 123. In Embodiment 1, the supported portion 122 is a horizontal plate and has the shape of a thin, roughly triangular prism. The second connecting portion 123 has the shape of a thin, roughly triangular prism with a smaller circumference than the supported portion 122. The supported portion 122 and the second connecting portion 123 form a second slide mounting portion 12s.

[0017] The supported portion 122 has a horizontal upper surface 122a, a horizontal lower surface 122b below the upper surface 122a, and two vertical side surfaces 122c located between the upper surface 122a and the lower surface 122b. In Figure 2(b), the main body portion 121 not covered by the supported portion 122 is shown as a shaded area. Also, in Figure 2(a), the side surfaces 122c of the supported portion 122 and the side surface 123a of the second connecting portion 123 are shown as vertical lines. As shown in Figure 2(b), the side surfaces 122c are concave curved surfaces that narrow towards the front side F. The same applies to the side surfaces 123a. The side surface 123a of the second connecting portion 123 is recessed compared to the side surfaces 122c of the supported portion 122, and the lower surface 122b of the supported portion 122 is located between the side surfaces 123a and 122c. The lower surface 122b is planar, and as shown in Figure 2(b), the horizontal distance between the side surfaces 122c and 123a is approximately constant, and the side surfaces 122c and 123a are curved inward toward the center of the sensor body 12. The side surfaces 122c and 123a are concave curved surfaces that narrow toward the front side F.

[0018] On the lower surface 122b of the supported portion 122, two points near the side surface 122c protrude downward, forming convex portions 122d. Inside the sensor body 12, a power receiving unit 124 is provided at a position far from the front F, receiving power via wireless power supply. The power receiving unit 124 is formed of a coil. The dotted lines indicate components hidden inside. A detected object 125 is provided on the upper surface 122a of the supported portion 122. An indicator light 126 is also provided on the sensor body 12.

[0019] A fire detector 1 is formed by combining the detector body 12 shown in Figure 2 and the detector base 11 shown in Figure 1. Figure 3 is a side view of the fire detector 1 of Embodiment 1. The detector body 12 is attached to the detector base 11 which is fixed to the ceiling plate C. The ceiling plate C is shown in cross-section. To achieve the state shown in Figure 3, the detector body 12 is lifted so that the supported portion 122 of the detector body 12 shown in Figure 2 is positioned on the support portion 112 of the detector base 11 shown in Figure 1, and the detector body 12 is inserted horizontally from the front side F into the entrance / exit side E of the detector base 11. When this is done, the lower surface 122b of the supported portion 122 of the detector body 12 shown in Figure 2 is placed on the upper surface 112a of the support portion 112 of the detector base 11 shown in Figure 1 and locked in place. At this time, the convex portion 122d of the detector body 12 shown in Figure 2 is fitted into the concave portion 112d of the detector base 11 shown in Figure 1. The sensor body 12 is then positioned by the protrusion 122d to prevent it from shifting horizontally.

[0020] When the sensor body 12 is inserted horizontally into the sensor base 11 to reach the state shown in Figure 3, the object to be detected 125 comes into close proximity to the sensor 115. The power receiving unit 124 also comes into close proximity to the power transmitting unit 114. In Embodiment 1, the sensor 115 is a reed switch, and the object to be detected 125 is a permanent magnet. Therefore, when the sensor is in the position shown in Figure 3, the reed switch of the sensor 115 closes, supplying alternating current to the power transmitting unit 114. This enables wireless power supply between the power transmitting unit 114 and the power receiving unit 124. The sensor body 12, having received wireless power, flashes its indicator light 126 for a certain period of time.

[0021] As shown in Figure 1, the entrance / exit side E of the sensor base 11 widens laterally, and as shown in Figure 2, the front side F of the sensor body 12 is narrowed laterally. Therefore, the sensor body 12 can be easily attached to the sensor base 11 which is mounted on the ceiling plate C. When attaching, the sensor body 12 is brought close to the sensor base 11 with the center line between the two support parts 112 on the sensor base 11 and the center lines on both sides of the supported part 122 on the sensor body 12 misaligned. Then, one of the sides 123a of the second connection part 123 shown in Figure 2 slides against the side 112c of the support part 112 shown in Figure 1, guiding the sensor body 12 to the correct position.

[0022] Figure 4 shows a side view of the drone 2 used to attach the sensor body 12 to the sensor base 11. The drone 2 is a sensor body transport device that carries the sensor body 12 and is also used when removing the sensor body 12 from the sensor base 11. The drone 2 is a multicopter type and consists of a drone body 21 with propellers 211, a transparent housing 22 for housing the sensor body 12, and a base 23 on which the housing 22 is attached to the drone body 21. Figure 4 is a side view, and there are propellers 211 hidden behind the visible propellers 211, so the drone body 21 has four propellers 211.

[0023] The base portion 23 that supports the housing portion 22 is flexible. In this embodiment, the base portion 23 is made of sponge. The housing portion 22 is a transparent, bottomed cylindrical shape and can house the sensor body 12 inside. Four spacers 24 are attached to the outer circumferential surface of the housing portion 22. Each spacer 24 has an upper head 241 and a head holding portion 242 that is fixed to the side of the housing portion 22 and supports the head 241. The upper surface of the head 241 is spherical and is located above the housing portion 22.

[0024] Figure 5 shows a side view illustrating the situation in which the sensor body 12 is attached to the sensor base 11 by the drone 2 in Embodiment 1. To easily distinguish the configurations, the sensor base 11 and the sensor body 12 are marked with patterns. The sensor base 11 is fixed to the ceiling panel C. The sensor body 12 is housed in the housing 22 of the drone 2. As shown in Figure 5, the head 241 of the drone 2 is in contact with the underside of the ceiling panel C. The top surface of the head 241 is spherical and can easily slide while in contact with the underside of the ceiling panel C. Because the base portion 23 is flexible, even if the drone body 21 is tilted, all four heads 241 can slide while in contact with the underside of the ceiling panel C. This allows the sensor body 12 to be attached to the sensor base 11 from the side while maintaining a constant distance from the ceiling panel C to the sensor body 12.

[0025] When attaching the sensor body 12 shown in Figure 2 to the sensor base 11 fixed to the ceiling panel C as shown in Figure 1, the sensor body 12 is housed in the drone 2 housing 22 shown in Figure 4. Then, the drone 2 is flown so that all the heads 241 of the spacer 24 come into contact with the underside of the ceiling panel C near the entrance / exit side E of the sensor base 11. At this time, the front side F of the sensor body 12 is facing the entrance / exit side E of the sensor base 11. Then, while keeping all the heads 241 of the spacer 24 pressed against the underside of the ceiling panel C, the drone 2 is flown toward the sensor base 11. As a result, a part of the side surface 123a of the second connection part 123 of the sensor body 12 and a part of the side surface 112c of the support part 112 of the sensor base 11 slide against each other, and the drone 2 moves laterally while correcting the position of the sensor body 12. Drone 2 is a sensor body transport device equipped with a housing section 22 for housing the sensor body 12, and a spacer 24 that can move horizontally while maintaining a constant distance from the ceiling above the housing section 22.

[0026] As the drone 2 moves laterally, the supported portion 122 of the sensor body 12 rests on the support portion 112 of the sensor base 11, and the protrusion 122d fits into the recess 112d. The sensor body 12 is then positioned by the protrusion 122d so as not to shift horizontally. At this time, the object to be detected 125 is close to the sensor 115, so the sensor base 11 applies alternating current to the power transmission unit 114. Since the power receiving unit 124 is close to the power transmission unit 114, the sensor body 12 receives wireless power from the power receiving unit 124.

[0027] In this way, by moving the second slide mounting portion 12s horizontally and locking it with the first slide mounting portion 11s, when the sensor body 12 is attached to the sensor base 11, the sensor body 12 is in a predetermined position on the sensor base 11, and power supply from the sensor base 11 to the sensor body 12 begins.

[0028] When power is supplied, the sensor unit 12 flashes its indicator light 126 for a predetermined period of time. Since the housing 22 is transparent, the worker can see the flashing of the indicator light 126 from below and confirm that the sensor unit 12 has been properly installed. Once the worker confirms the installation by the flashing of the indicator light 126, they lower the drone 2 to complete the installation of the sensor unit 12. The housing 22 may also have a mesh structure or a structure with connected wires so that the flashing of the indicator light 126 can be seen from below.

[0029] When removing the sensor body 12 from the sensor base 11, the drone 2 is raised below the sensor body 12 to house the sensor body 12 in the housing section 22. Then, the drone 2 is moved parallel to the entrance / exit side E of the sensor base 31 to remove the sensor body 12 from the sensor base 11. When the sensor body 12 is removed from the sensor base 11, the sensor body 12 moves away from its predetermined position on the sensor base 11, causing the detected object 125 to move away from the sensor 115 and ending the power supply to the power transmission unit 114. [Examples]

[0030] Figure 6 shows the detector base 31 in the fire detector 3 of Example 2. Figure 6(a) is a side view when the detector base 31 is fixed to the ceiling panel C, and Figure 6(b) is a bottom view. Figure 6(b) is a view from the direction of the arrow in Figure 6(a), and Figure 6(a) is a view from the direction of the arrow in Figure 6(b). In Figure 6(a), the ceiling panel C is shown in cross-section.

[0031] The sensor base 31 extends in a rail-like manner and is fixed to the underside of the ceiling plate C. The sensor base 31 has a rectangular parallelepiped base portion 311, a support portion 312, and a first connecting portion 313. The support portion 312 is provided at a distance below the base portion 311 which is fixed to the ceiling plate C, and the base portion 311 and the support portion 312 are connected by a narrow first connecting portion 313. In Embodiment 2, the base portion 311 and the support portion 312 are horizontal plates extending in one direction, and the first connecting portion 313 is a rod-shaped body extending in one direction. The base portion 311 is wide, and the support portion 312 is narrower than the base portion 311. The first connecting portion 313 is also narrower than the support portion 312. The support portion 312 and the first connecting portion 313 form a first slide mounting portion 31s.

[0032] The support portion 312 has a horizontal upper surface 312a, a horizontal lower surface 312b below the upper surface 312a, and a vertical side surface 312c between the upper surface 312a and the lower surface 312b. The two side surfaces 312c of the support portion 312 are parallel. In Figure 6(b), the base portion 311 not covered by the support portion 312 is shown as a shaded area.

[0033] On the upper surface 312a of the support portion 312, there are two protrusions near the side surface 312c, forming convex portions 312d. The base portion 311 is also provided with a power transmission unit 314 below its lower surface 312b, which transmits power wirelessly. The power transmission unit 314 is made of coils. The dotted lines indicate components hidden internally. A sensor 315 is provided on the lower surface of the base portion 311. The sensor 315 detects when the object to be detected 325 (described later) comes into close proximity.

[0034] Figure 7 shows the detector body 32 in the fire detector 3 of Embodiment 2. Figure 7(a) is a side view, and Figure 7(b) is a top view. Figure 7(b) is a view from the direction of the arrow in Figure 7(a), and Figure 7(a) is a view from the direction of the arrow in Figure 7(b). The detector body 32 is detachably attached to the detector base 31.

[0035] In the sensor body 32, a supported portion 322 is provided above the main body portion 321 at a distance, and the main body portion 321 and the supported portion 322 are connected by a second connecting portion 323. In Embodiment 2, the supported portion 322 is a horizontal plate, and the second connecting portion 323 is a side wall provided on the outer circumference of the sensor body 32. The supported portion 322 and the second connecting portion 323 form a second slide mounting portion 32s.

[0036] The supported portion 322 has a horizontal upper surface 322a, a horizontal lower surface 322b below the upper surface 322a, and two vertical side surfaces 322c located between the upper surface 322a and the lower surface 322b. In Figure 7(b), the main body portion 321 not covered by the supported portion 322 is shown as a shaded area. Also, in Figure 7(a), the side surfaces 322c of the supported portion 322 are shown as vertical lines. As shown in Figure 7(b), the side surfaces 322c are parallel from the opposite side of the front side F toward the front side F, and from there they spread out to the front side F beyond the center. The two side surfaces 322c are convex curved surfaces facing each other.

[0037] On the lower surface 322b of the supported portion 322, there are two indentations near the side surface 322c that are recessed upward, forming recesses 322d. Inside the sensor body 32, there is a power receiving unit 324 that receives power via wireless power supply. The power receiving unit 324 is made of a coil. The dotted lines indicate components hidden inside. The upper surface of the main body 321 is provided with the power receiving unit 324 and the detected object 325. The sensor body 32 is also provided with an indicator light 326.

[0038] The fire detector 3 is formed by combining the detector body 32 and the detector base 31. Figure 8 is a side view showing the fire detector 3 of Embodiment 2. The detector body 32 is attached to the detector base 31 which is fixed to the ceiling panel C. To achieve the state shown in Figure 8, the detector body 32 is inserted horizontally from the front side F into the entry / exit side E of the detector base 11, with the supported portion 322 of the detector body 32 shown in Figure 7 positioned on the support portion 312 of the detector base 31 shown in Figure 6. When this is done, a part of the lower surface 322b of the supported portion 322 of the detector body 32 is placed on the upper surface 312a of the support portion 312 of the detector base 31 and locked in place. At this time, the convex portion 312d of the detector base 31 is fitted into the concave portion 322d of the detector body 32. When the sensor body 32 is locked to the sensor base 31, the sensor body 32 is positioned by the protrusion 312d of the sensor base 31 so as not to shift horizontally.

[0039] Figure 9 is a side view showing the situation in which the sensor body 32 is attached to the sensor base 31 by the drone 2 in Embodiment 2. Figure 9 shows the sensor base 31, sensor body 32, and drone 2 as viewed from a direction rotated 90 degrees horizontally from Figure 8. The end portion 313a of the sensor base 31 is inclined so that the lower surface of the upper base portion 311 and the upper surface 312a of the lower support portion 312 expand vertically toward the entrance / exit side E, making it easier for the supported portion 322 shown in Figure 6 to fit between the base portion 311 and the support portion 312. Also, as shown in Figure 7, the supported portion 322 of the sensor body 32 also has its side 322c widen toward the front side F. Therefore, the end portion 313a of the sensor base 31 can easily fit between the two side 322c of the sensor body 32.

[0040] In Figure 9, the sensor body 32 and the drone 2 are positioned outside the end portion 313a located on the entrance / exit side E of the sensor base 31. All of the heads 241 of the spacer 24 slide while in contact with the underside of the ceiling plate C. In Figure 9, the drone 2 is tilted, but the flexible base portion 23 prevents the heads 241 from separating from the underside of the ceiling plate C.

[0041] When the supported portion 322 of the sensor body 32 is inserted horizontally onto the support portion 312 of the sensor base 31, as shown in Figure 8, the object to be detected 325, located behind the power receiving unit 324 in Figure 8, comes into close proximity to the sensor 315, located behind the power transmitting unit 314. The power receiving unit 324 also comes into close proximity to the power transmitting unit 314. In Embodiment 2, the sensor 315 is a reed switch, and the object to be detected 325 is a permanent magnet. Therefore, when the position shown in Figure 8 is reached, the reed switch of the sensor 315 closes, supplying alternating current to the power transmitting unit 314. This enables wireless power supply between the power transmitting unit 314 and the power receiving unit 324.

[0042] In this way, by moving the second slide mounting portion 32s horizontally and engaging it with the first slide mounting portion 31s, when the sensor body 32 is attached to the sensor base 31, the sensor body 32 is in a predetermined position on the sensor base 31, and power supply from the sensor base 31 to the sensor body 32 begins. The sensor body 32, having received wireless power, flashes the indicator light 326 for a certain period of time. Attachment and detachment of the sensor body 32 to the sensor base 31 are performed by the drone 2, as in Embodiment 1.

[0043] In Embodiment 2, the length of the detector base 31 in the extending direction is made larger than the diameter of the detector body 32. The remaining portion of the detector base 31 after attaching the detector body 32 can be used to attach other detector bodies for detecting other fire phenomena, or other components to be installed on the ceiling, etc., using a drone 2 or the like. The length of the detector base 31 in the extending direction can also be made to be approximately the same as the diameter of the detector body 32, or shorter than the diameter. [Examples]

[0044] Figure 10 shows the detector base 41 in the fire detector 4 of Example 3. Figure 10(a) is a side view when the detector base 41 is fixed to the ceiling panel C, and Figure 10(b) is a bottom view. Figure 10(b) is a view from the direction of the arrow in Figure 10(a), and Figure 10(a) is a view from the direction of the arrow in Figure 10(b). In Figure 10(a), the ceiling panel C is shown in cross-section.

[0045] In the sensor base 41, a support portion 412 is provided below the base portion 411 at a distance, and the base portion 411 and the support portion 412 are connected by a first connecting portion 413. In Embodiment 3, the support portion 412 is a horizontal plate, and the first connecting portion 413 is a side wall provided on the outer circumference of the sensor base 41. The support portion 412 and the first connecting portion 413 form a first slide mounting portion 41s.

[0046] The support portion 412 has a horizontal upper surface 412a, a horizontal lower surface 412b below the upper surface 412a, and a vertical side surface 412c between the upper surface 412a and the lower surface 412b. In Figure 10(b), the support portions 412 provided at two locations on the left and right have side surfaces 412c that are parallel in the part far from the entrance / exit side E, and widen horizontally in the part close to the entrance / exit side E. The side surface 412c of the support portion 412 in the part close to the entrance / exit side E is a convex curved surface. In Figure 10(b), the base portion 411 not covered by the support portion 412 is shown as a shaded area. Also, in Figure 10(a), the side surface 412c is shown as a vertical line.

[0047] The upper surface 412a of the support portion 412 has two protrusions, forming convex portions 412d. The base portion 411 is also provided with a power transmission unit 414 that transmits power wirelessly. The dotted lines indicate components hidden inside. A sensor 415 is provided on the lower surface of the base portion 411. The sensor 415 detects when the object to be detected 425, described later, comes into close proximity.

[0048] Figure 11 shows the detector body 42 in the fire detector 4 of Embodiment 3. Figure 11(a) is a side view, and Figure 11(b) is a top view. Figure 11(b) is a view from the direction of the arrow in Figure 11(a), and Figure 11(a) is a view from the direction of the arrow in Figure 11(b). The detector body 42 is detachably attached to the detector base 41.

[0049] The sensor body 42 has a supported portion 422 positioned above the main body portion 421 at a distance, and the main body portion 421 and the supported portion 422 are connected by a second connecting portion 423. In Embodiment 3, the supported portion 422 is a horizontal plate, and the second connecting portion 423 is a rod-shaped rectangular parallelepiped. As shown in Figure 11(b), the supported portion 422 has the shape of a part of a roughly ellipse that narrows in the direction of the front side F when viewed from above, and the width of the supported portion 422 is narrower than that of the circular main body portion 421. The supported portion 422 and the second connecting portion 423 form a second slide mounting portion 42s.

[0050] The supported portion 422 has a horizontal upper surface 422a, a horizontal lower surface 422b below the upper surface 422a, and two vertical side surfaces 422c between the upper surface 422a and the lower surface 422b. The side surfaces 422c are convex curved surfaces that narrow towards the front side F, as shown in Figure 11(b). In Figure 11(b), the main body portion 421 not covered by the supported portion 422 is shown as a shaded area. The second connecting portion 423 is a long rectangular parallelepiped shape, and its side surfaces 423a on both sides are parallel to each other. The dotted lines indicate components hidden inside, etc. The side surfaces 422c on both sides of the supported portion 422 extend laterally beyond the second connecting portion 423. And, as shown in Figure 11(a), the supported portion 422 has a lower surface 422b below it. The two lower surfaces 422b located on the outer sides of the second connecting portion 423 are planar. As shown in Figure 11(b), the width of the supported portion 422 in the direction perpendicular to the extending direction of the second connecting portion 423 is less than 2 / 3 of the diameter of the main body portion 421 at its widest point, and becomes smaller as it approaches the front side F. The side surface 422c of the supported portion 422 is convex outward.

[0051] The lower surface 422b of the supported portion 422 has two indentations that are recessed upward, forming recesses 422d. Furthermore, a power receiving unit 424, which receives power via wireless power supply, is provided on the upper surface 422a of the supported portion 422, protruding upward from the upper surface 422a. Additionally, a detection object 425 is provided on the upper surface 422a of the supported portion 422. The sensor body 42 also has an indicator light 426 facing downward.

[0052] Similar to Examples 1 and 2, the sensor body 42 can be mounted on the drone 2 and attached to the sensor base 41 fixed to the ceiling panel C by inserting it from the side. During attachment, the second connection portion 423 of the sensor body 42 contacts and is guided by the side surface 412c of the support portion 412 of the sensor base 41. Then, the supported portion 422 of the sensor body 42 is placed on the support portion 412 of the sensor base 41 and locked in place. At this time, the sensor body 42 is positioned by the protrusion 412d of the sensor base 41 so as not to shift horizontally.

[0053] Figure 12 shows a top view of the power transmission unit 414 and power receiving unit 424 of Embodiment 3. Figure 12(a) shows the positions of the power transmission unit 414 and power receiving unit 424 immediately before the sensor body 42 is attached to a predetermined position on the sensor base 41, and Figure 12(b) shows the positions of the power transmission unit 414 and power receiving unit 424 when they are attached to the predetermined position. The power transmission unit 414 has a cylindrical iron core 414a and a coil 414b wound around the side of the iron core 414a. The power receiving unit 424 has the same configuration as the power transmission unit 414, and has a cylindrical iron core 424a and a coil 424b wound around the side of the iron core 424a.

[0054] As shown in Figure 12(a), just before the sensor body 42 is attached to the predetermined position on the sensor base 41, the power transmission unit 414 and the power receiving unit 424 are separated horizontally, and the power receiving unit 424 is approaching the power transmission unit 414 as indicated by the arrow. Then, as shown in Figure 12(b), when the power receiving unit 424 comes into contact with the power transmission unit 414, the movement of the sensor body 42 relative to the sensor base 41 stops. At this time, the protrusion 412d shown in Figure 10 is fitted into the recess 422d shown in Figure 11. The sensor body 42 is then positioned by the protrusion 412d so as not to shift horizontally. The power transmission unit 414 and the power receiving unit 424 also serve as stoppers when attaching the sensor body 42 to the sensor base 41.

[0055] When the sensor 415 and the object to be detected 425 are in close proximity, the reed switch of the sensor 415 closes, applying an alternating current to the coil 414b in Figure 12(b), and the fluctuating magnetic field generates an alternating current in the coil 424b, thereby performing wireless power supply. In this way, when the sensor body 42 is attached to the sensor base 41 by moving the second slide mounting part 42s horizontally and locking it with the first slide mounting part 41s, the sensor body 42 is in a predetermined position on the sensor base 41, and power supply from the sensor base 41 to the sensor body 42 begins. In Embodiment 3, the power transmission unit 414 and the power receiving unit 424 function as stoppers. The attachment and detachment of the sensor body 42 to the sensor base 41 is performed by the drone 2, as in Embodiments 1 and 2.

[0056] Figure 13 shows a modified power transmission unit 416 and power receiving unit 427, which are variations of the power transmission unit 414 and power receiving unit 424 of Embodiment 3. Figure 13(a) shows the state just before the sensor body 42 is attached to the predetermined position on the sensor base 41, and Figure 13(b) shows the state after it has been attached to the predetermined position. The power transmission unit 416 has an iron core 416a with a cylindrical shaft bent into a U shape, and a coil 416b wound around the side of the iron core 416a. The power receiving unit 427 has the same configuration as the power transmission unit 416, and has a U-shaped iron core 427a and a coil 427b wound around the side of the iron core 427a.

[0057] As shown in Figure 13(a), just before the sensor body 42 is attached to the predetermined position on the sensor base 41, the power transmission unit 416 and the power receiving unit 427 are separated horizontally, and the power receiving unit 427 is approaching the power transmission unit 416 as indicated by the arrow. Then, as shown in Figure 13(b), when the power receiving unit 427 comes into contact with the power transmission unit 416, the movement of the sensor body 42 relative to the sensor base 41 stops. In both Figure 13(a) and Figure 13(b), the end faces of the iron core 416a and the end face of the iron core 427a face each other.

[0058] In the modified configuration, as shown in Figure 13, the power transmission unit 416, iron core 416a, and the power receiving unit 427, iron core 427a are bent into a U-shape. Also, the coil 416b wound around the iron core 416a is bent to conform to the shape of the iron core 416a. The same applies to the coil 427b. In the modified configuration, as shown in Figure 13(b), the ends of the iron cores 416a and 427a of the power transmission unit 416 and power receiving unit 427 come into contact, stopping the movement of the sensor body 42 relative to the sensor base 41. This enables wireless power supply. Similar to Embodiment 3 shown in Figure 12, the power transmission unit 416 and power receiving unit 427 also function as stoppers.

[0059] The supported portion 422 in Example 3 has the shape shown in Figure 11, but it may have other shapes. For example, it may be a rectangular parallelepiped flat plate, like the support portion 312 in Example 2. The supported portion 422 can be placed on the support portion 412 as long as it is larger than the parallel space between the two support portions 412 and protrudes from the second connecting portion 423. The horizontal width of the second connecting portion 423 may be larger or smaller than that shown in Figure 11.

[0060] In Examples 1-3, coils are used in the power transmission units 114, 314, and 414 and the power receiving units 124, 324, and 424, but other wireless power supply devices may be used. Also, in Examples 1-3, reed switches that close with a magnetic field are used as sensors 115, 315, and 415, and permanent magnets are used as detected objects 125, 325, and 425. However, other configurations may be used. For example, a light-emitting element and a light-receiving element may be used as the sensor, and a reflector may be used as the detected object. Alternatively, a switch that closes when pressed may be used as the sensor, and the detected object may be the part that applies pressure to the switch. Furthermore, a power transmission unit equipped with a coil may be used as the sensor, and a power receiving unit equipped with a coil may be used as the detected object. A weak alternating current may be applied to the power transmission unit of the sensor to monitor the electrical state such as inductance, and the change in the electrical state due to the proximity of the power receiving unit (the detected object) may be detected, and the system may switch to alternating current for wireless power supply.

[0061] In this embodiment, a drone 2 is described as a sensor body transport device for transporting the sensor bodies 12, 32, and 42. However, other devices may be used. For example, a mounting rod may be provided with a housing section for housing the sensor body at the tip of a support rod, and a spacer that can move horizontally at a constant distance from the ceiling, similar to the housing section 22 in Figure 4, above the housing section.

[0062] Furthermore, the specific configuration is not limited to the embodiments, and any design changes, etc., that do not depart from the spirit of the present invention are also included. In addition, the above-described embodiments and modifications can be combined by utilizing each other's technologies, as long as there are no particular contradictions or problems in their purpose and configuration. [Explanation of Symbols]

[0063] C Ceiling panel, F Front side, E Entrance / exit side, 1 fire detector, 11 Sensor base, 111 Base section, 11s First slide mounting section, 112 Support section, 112a Top surface, 112b Bottom surface, 112c Side surface, 112d Recess, 113 First connection section, 114 Power transmission section, 115 Sensor, 12 Sensor body, 121 Main body, 12s 2nd slide mounting part, 122 Supported part, 122a Top surface, 122b Bottom surface, 122c Side surface, 122d Convex part, 123 Second connection part, 123a Side surface, 124 Power receiving part, 125 Detected object, 126 Indicator light, 2 Drone, 21 Drone body, 211 Propeller, 22 Storage section, 23 Base section, 24 Spacer, 241 Head, 242 Head holder, 3 fire detector, 31 Sensor base, 311 Base section, 31s First slide mounting section, 312 Support section, 312a Top surface, 312b Bottom surface, 312c Side surface, 312d Protrusion, 313 First connection section, 313a End section, 314 Power transmission section, 315 Sensor, 32 Sensor body, 321 Main body section, 32s Second slide mounting section, 322 Supported section, 322a Top surface, 322b Bottom surface, 322c Side surface, 322d Recess, 323 Second connection section, 324 Power receiving section, 325 Detected object, 326 Indicator light, 4 fire detector, 41 Sensor base, 411 Base section, 41s First slide mounting section, 412 Support section, 412a Top surface, 412b Bottom surface, 412c Side surface, 412d Protrusion, 413 First connection section, 414 Power transmission section, 414a Iron core, 414b Coil, 415 Sensor, 416 Power transmission section, 416a Iron core, 416b Coil, 42 Detector body, 421 Main body section, 42s Second slide mounting section, 422 Supported section, 422a Top surface, 422b Bottom surface, 422c Side surface, 422d Recess, 423 Second connection section, 423a Side surface, 424 Power receiving section, 424a Iron core, 424b Coil, 425 Detected object, 426 Indicator light, 427 Power receiving section, 427a Iron core, 427b Coil

Claims

1. Detector base and, A sensor body is detachably attached to the sensor base, Equipped with, The sensor base comprises a base portion, a first slide mounting portion, and a power transmission portion that transmits power wirelessly. The sensor body comprises a main body, a second slide mounting portion provided on the upper part of the main body, and a power receiving portion that receives power by wireless power supply. When the sensor body is mounted on the sensor base by moving the second slide mounting portion horizontally and engaging it with the first slide mounting portion, the sensor body is positioned in a predetermined location on the sensor base, and power is supplied from the sensor base to the sensor body. A fire detector characterized by the following features.

2. When the sensor body is removed from the sensor base, the power supply from the sensor base to the sensor body is terminated as the sensor body moves away from its predetermined position on the sensor base. A fire detector as described in claim 1.

3. The first slide mounting portion comprises a support portion and a first connecting portion that connects the support portion to the base portion. The second slide mounting portion comprises a supported portion and a second connecting portion that connects the supported portion to the main body portion. The fire detector according to claim 2, characterized in that the detector body is attached to the detector base by placing the supported portion on the support portion.

4. The fire detector according to claim 3, characterized in that the support portion or the supported portion extends laterally.

5. The upper part of the support portion has a recess or a protrusion, The fire detector according to claim 3 or 4, characterized in that when the detector body is locked to the detector base, the detector body is positioned so as not to shift horizontally by the protrusion.

6. It has a housing section for housing the detector body of the fire detector, A sensor body transport device characterized by having a spacer at the top of the housing section that can move horizontally while maintaining a constant distance from the ceiling.

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