JP7717673B2 - How to attach and detach the mounting base and fire detector body - Google Patents

Description

The present invention relates to a mounting base for a fire detector and a method for attaching and detaching the fire detector body.

Fire detectors such as smoke detectors are installed in buildings by attaching the fire detector body to a mounting base that is pre-fixed to the ceiling or other surface. The fire detector body attached to the mounting base can be removed for inspections, etc. The fire detector in Patent Document 1 is equipped with a blade receiving bracket and a contact spring on the base body, which allows the fire detector body to be attached to and detached from the base body, which is the mounting base.

Figure 1 shows a conventional fire detector that is attached to a ceiling panel C as in Patent Document 1. Figure 1(a) shows a cross-sectional view of the mounting base 8 attached to a hole in the ceiling panel C, and the fire detector main body 2 before being attached to the mounting base 8. Figure 1(b) shows a cross-sectional view of the mounting base 8 and the fire detector main body 2 attached to the mounting base 8.

The fire detector is composed of a mounting base 8 that is pre-fixed to the ceiling panel C, and a fire detector main body 2 that is removably attached to the mounting base 8. The mounting base 8 comprises a mounting base main body 81, a flange 82 provided around the mounting base main body 81, and a fixing member 89 provided on the top of the mounting base main body 81. In this specification, top and bottom are described when the mounting base and other components are attached to the ceiling panel C. The fixing member 89 comprises a pressing piece 891 provided on the back side of the mounting base main body 81, a square female screw 892, and a male screw 893 that passes through the pressing piece 891 and is screwed into the square female screw 892. There are two sets of pressing piece 891, square female screw 892, and male screw 893.

When fixing the mounting base 8 to the ceiling board C, the fixing member 89 and mounting base main body 81 are inserted into a hole drilled in the ceiling board C with both ends of the pressing piece 891 pointing up from the back side of the mounting base main body 81. Then, by turning the male screw 893, the pressing piece 891 is tightened between the square female screw 892 and the rear protrusion 811, expanding the pressing piece 891. The ceiling board C is sandwiched between the outer end of the expanded pressing piece 891 and the flange 82, and the mounting base 8 is fixed to the ceiling board C as shown in Figure 1(a).

The fire detector main body 2 is held by the operator's hand and brought close to the mounting base 8 from below, as shown in Figure 1(a). It is then inserted into the fitting space 83 and rotated to be attached to the mounting base 8, as shown in Figure 1(b). In addition, in the attached state shown in Figure 1(b), the operator can remove the fire detector main body 2 from the mounting base 8 by rotating it in the opposite direction to that used for attachment.

Figure 2 shows a bottom view of the mounting base 8 attached to the ceiling panel C. Two sets of contact springs 841 and blade receiving fittings 842 are provided in the fitting space 83 of the mounting base 8. The blade receiving fittings 842 are located behind the contact springs 841. The mounting base 8 is surrounded by the ceiling panel C, and the pressing piece 891 is not visible in Figure 2 because it is located above the ceiling panel C. The base 841a of the contact spring 841 is fixed to the blade receiving fittings 842, and the end 841b is bent in the opposite direction to the blade receiving fittings 842. The end 841b is biased toward the blade receiving fittings 842.

Figure 3 shows a top view of the fire detector main body 2. Two cutting edges 22 are attached to the fire detector main body 2 at opposing positions on the detector rear panel 21. Figure 4 shows an enlarged view of the cutting edges 22 shown in Figure 3. Figure 4(a) is a top view of the cutting edges 22, and Figure 4(b) is a side view of the cutting edges 22. The cutting edges 22 are configured by bending a single conductive plate to form a contact portion 221, an intermediate portion 222, and a fixed portion 223. The portion between the contact portion 221 and the intermediate portion 222 is bent in one direction, and the portion between the intermediate portion 222 and the fixed portion 223 is bent in the opposite direction. A fixing screw hole 224 is provided in the fixed portion 223. The fixing portion 223 is fixed to the detector rear panel 21 by threading a screw into the fixing screw hole 224, thereby fixing the cutting edges 22 to the detector rear panel 21.

When attaching the fire detector main body 2 to the mounting base 8, the fire detector main body 2 is rotated within the fitting space 83, so that the contact portion 221 of the cutting edge 22 is inserted between the contact spring 841 and the cutting edge receiving metal fitting 842 of the mounting base 8. The contact portion 221 is then sandwiched between the contact spring 841 and the cutting edge receiving metal fitting 842. This attaches the fire detector main body 2 to the mounting base 8, and electrically connects the conductive cutting edge 22, contact spring 841, and cutting edge receiving metal fitting 842. Furthermore, by rotating the fire detector main body 2 in the opposite direction to that used for attachment, the cutting edge 22 comes out from between the contact spring 841 and the cutting edge receiving metal fitting 842, allowing the fire detector main body 2 to be removed from the mounting base 8.

Japanese Patent Application Laid-Open No. 2019-169075

The fire detector body is attached to and detached from the mounting base by the worker holding it in their hand and rotating it. When performing this work in a typical office building, a stepladder can be used, but when performing this work on fire detectors installed on the ceiling of an atrium or theater with high ceilings, it is necessary to erect high scaffolding, which is costly. Therefore, a multicopter-type drone could be used.

The blade of the fire detector body is sandwiched between the blade receiving bracket of the mounting base and the contact spring, and a certain amount of torque is required to rotate the fire detector body. However, while a multicopters can generate torque by maneuvering, it is difficult to generate enough torque to rotate the fire detector body with the blade sandwiched between them while it is flying.

The present invention addresses the problem of how difficult it is to obtain the torque required to rotate the fire detector body when attaching or detaching the fire detector body to a mounting base on a multicopter.

The mounting base in one embodiment of the present invention is a mounting base for a fire detector and includes a first blade receiving bracket, a second blade receiving bracket located above the first blade receiving bracket, an externally exposed electrical terminal that can receive electrical power from the outside, and an actuator that connects to the first and second blade receiving brackets and receives electrical power through the electrical terminal. The fire detector can be fixed by sandwiching the blade of the fire detector between the first and second blade receiving brackets, and when electrical power is supplied to the electrical terminal, the actuator is driven and the first and second blade receiving brackets are separated.

This invention makes it possible to use a multicopter to remove the fire detector body from a mounting base installed at a high altitude, or to attach the fire detector body to the mounting base.

A conventional fire detector attached to a ceiling panel. FIG. Top view of the fire detector body. An enlarged view of the blade fittings on the fire detector body. FIG. 4 is a bottom view of the mounting base according to the first embodiment. FIG. 3 is an enlarged view of the attachment portion in the first direction in the first embodiment. FIG. 4 is an enlarged view of the attachment portion in the second direction in the first embodiment. 3 shows a circuit configuration of a mounting base in the first embodiment. FIG. 10 is a diagram showing a situation in which a multicopter flies near a fire detector in the first embodiment. FIG. 10 is a diagram showing a state in which the multicopter is connected to the mounting base in the first embodiment. FIG. 10 is a diagram showing a situation in which a multicopter equipped with a fire detector main body flies near the mounting base in the first embodiment. FIG. 10 is a diagram showing the vicinity of the blade receiving metal fitting of the mounting member in the mounting base of the second embodiment. FIG. 11 is a diagram showing a situation in which a multicopter equipped with a fire detector main body flies near a mounting member in Example 3.

As mentioned above, in this specification, up and down are described when the mounting base or the like is attached to the ceiling panel C. Figure 5 shows a bottom view of the mounting base 1 in an embodiment of the present invention. The mounting base 1 comprises a mounting base main body 11 and a flange portion 12 with a truncated conical side shape that extends outward. The inside of the mounting base main body 11 forms a fitting space 13 into which the fire detector main body 2 is fitted. This fire detector main body 2 is the same as the conventional fire detector main body 2 shown in Figures 3 and 4.

The mounting base body 11 is provided with a mounting member 14 above the fitting space 13 for mounting the fire detector body 2. The mounting member 14 includes a first blade receiving bracket 141, a second blade receiving bracket 142, an actuator 143, a spacing member 144, and an externally exposed electrical terminal 145. The second blade receiving bracket 142 is provided above the first blade receiving bracket 141 and is not shown in Figure 5 because it is hidden. The mounting base 1 is circular, and the electrical terminals 145 are provided in a wide arc shape at two opposing locations on the flange 12 located on the outer periphery of the mounting base 1. In addition to the electrical terminals 145, an LED lamp 15 is provided on the flange 12. The actuator 143 in Example 1 is a linear solenoid actuator.

The mounting base 1 is equipped with a fixing member 19, similar to the fixing member 89 of the conventional mounting base 8. The fixing member 19 has male threads 193 in two locations. The square female threads 192 are hidden on the back side of the mounting base main body 11. The retaining piece 191 is not shown.

Figure 6 shows an enlarged view of the mounting portion in Example 1 in a first direction. The first direction is the direction of the arrow A in Figure 5. When viewed in the direction A with the front side facing downward in Figure 5, the spacing member 144 is on the left side, as shown in Figure 6. Figure 7 shows an enlarged view of the mounting portion in Example 1 in a second direction. The second direction is the direction of the arrow B in Figure 5. Figures 6 and 7(a) show the state in which the contact portion 221 of the blade fitting 22 of the fire detector main body 2 is sandwiched between the first blade fitting 141 and the second blade fitting 142 of the mounting base 1. Figure 7(b) shows the state in which a gap has occurred between the second blade fitting 142 and the blade fitting 22, and Figure 7(c) shows the state in which the blade fitting 22 has slipped out from between the first blade fitting 141 and the second blade fitting 142.

The first blade receiving fixture 141 is fixed, and the second blade receiving fixture 142 is movable away from the first blade receiving fixture 141 by being driven by the actuator 143. The first blade receiving fixture 141 is made of thick metal and serves as the base of the blade receiving fixture so that the blade receiving fixture 22 can be placed on top of it. As the base of the blade receiving fixture, it corresponds to the blade receiving fixture 842 of the conventional example. The second blade receiving fixture 142 is an elastic leaf spring and corresponds to the contact spring 841 of the conventional example. In Example 1, the contact spring 841 and blade receiving fixture 842 of the conventional example are configured upside down. This allows the blade receiving fixture 22 to be stably placed on the first blade receiving fixture 141, even if the second blade receiving fixture 142 is thin and highly flexible.

Figures 6 and 7 also show a spacing member 144 in which the vicinity of the tip 144b forms a tapered surface 144c. As shown in Figure 6, the base 144a of the spacing member 144 is fixed to the tip of the plunger 143a of the actuator 143. The tip 144b of the spacing member 144 and the tapered surface 144c in its vicinity are inserted between the first blade receiving fixture 141 and the second blade receiving fixture 142.

When current is supplied to the actuator 143 from the current-carrying terminal 145, the plunger 143a moves in the direction of P in Figure 6. This pushes the tip 144b of the spacer 144 in the direction of P, and the tapered surface 144c pushes the second blade receiving fixture 142 up in the direction of R. Figure 7(a) shows the state before the plunger 143a moves in the direction of P, and Figure 7(b) shows the state after the plunger 143a has moved in the direction of the arrow P. In Figure 7(b), the movement of the plunger 143a causes the spacer 144 to push the second blade receiving fixture 142 up in the direction of the arrow R, creating a gap between the contact portion 221 of the cutting fixture 22 and the second blade receiving fixture 142.

As a result, the blade fitting 22, which was sandwiched between the first blade fitting 141 and the second blade fitting 142, can move freely in the direction of the arrow M in Figure 7(b), allowing the fire detector main body 2, which was attached to the mounting base 1, to be easily rotated and removed.

When the fire detector main body 2 is removed and the current to the actuator 143 is cut off, the plunger 143a is designed to return in the direction opposite to the arrow P shown in Figure 6. As a result, most of the spacing member 144 comes out from between the first blade receiving fixture 141 and the second blade receiving fixture 142, resulting in the state shown in Figure 7(c).

When attaching the fire detector main body 2 to the mounting base 1, current is supplied to the actuator 143 in the state shown in Figure 7(c). This causes the plunger 143a to move in the direction of the arrow P, causing the spacing member 144 to open the gap between the first blade receiving bracket 141 and the second blade receiving bracket 142. This allows the drone to rotate slightly on the spot, making it easy to insert the blade receiving bracket 22 between the first blade receiving bracket 141 and the second blade receiving bracket 142.

In Example 1, the fire detector main body 2 can be attached by sandwiching the blade fitting 22 of the fire detector main body 2 between the first blade fitting 141 and the second blade fitting 142. When current is supplied to the current-carrying terminal 145, the actuator 143 is driven, causing the first blade fitting 141 and the second blade fitting 142 to separate.

(Circuit configuration of mounting base 1)
FIG. 8 shows the circuit configuration of the mounting base 1 in Example 1. Two conductive terminals 145 are connected to two actuators 143 via a rectifier 146. When a voltage is supplied to the conductive terminals 145, the rectifier 146 rectifies the voltage of whichever of the two conductive terminals 145 has a higher voltage. Then, current flows through the actuators 143, causing the plungers 143a to protrude. In this way, when current is supplied between the two conductive terminals 145, the plungers 143a protrude from the two actuators 143, regardless of which has a higher voltage. Furthermore, when the current between the conductive terminals 145 is cut off, the plungers 143a of the actuators 143 retract.

The output of the rectifier 146 is also connected to the LED lamp 15 shown in Figure 5. Therefore, the LED lamp 15 lights up while current is flowing through the actuator 143 and the first blade receiving fixture 141 and the second blade receiving fixture 142 are separated. By visually checking the lit state of the LED lamp 15, the operator can determine whether current has been applied and the first blade receiving fixture 141 and the second blade receiving fixture 142 are separated, or whether current has not been applied and the first blade receiving fixture 141 and the second blade receiving fixture 142 are separated.

(Attachment and detachment of the fire detector main body 2 using the multicopter 3)
9 shows a fire detector mounted on a ceiling panel C in Example 1 and a multicopter 3 flying near the fire detector. The fire detector comprises a mounting base 1 fixed to the ceiling panel C, which serves as an installation portion, and a fire detector main body 2 removably attached to the mounting base 1. The mounting base 1 is fixed to the ceiling panel C by a fixing member 19. The fixing member 19 has two retaining pieces 191, two square female screws 192, and two male screws 193. By turning the male screws 193, the retaining pieces 191 are tightened between the square female screws 192 and the rear protrusions 111, expanding the retaining pieces 191. The ceiling panel C is sandwiched between both ends of the expanded retaining pieces 191 and the flanges 12, thereby fixing the mounting base 1.

The multicopter 3, a type of drone, is equipped with multiple propellers 31 and can not only ascend, descend, and move left and right, but also hover and turn left and right. The multicopter 3 is equipped with a motor 32 that rotates the propellers 31, an ESC 33 that controls the rotation speed of the motor 32, a control unit 34, a transceiver 35, and a battery 36. The control unit 34 controls the rotation speed of the multiple motors 32 to perform flight control of the multicopter 3, such as hovering, ascending, descending, moving left and right, and turning left and right.

The multicopter 3 of Example 1 is equipped with a detector holder 37, a pair of contact springs 38, and a camera 39 on its upper part. The detector holder 37 is a cylindrical member with a recess at the top, and the fire detector main body 2 can be placed in the recess at the top. The top of the detector holder 37 is a cone-shaped recess with a rubber pad (not shown) inside to prevent slipping. A pair of contact springs 38 are provided on both sides of the detector holder 37, facing upward. A contact 381 that comes into contact with the current-carrying terminal 145 is formed near the tip of the contact spring 38, and a predetermined voltage is applied between the pair of contacts 381. The camera 39 is attached to the side of the detector holder 37, facing upward.

The method for attaching and detaching the fire detector main unit 2 to the multicopter 3 is as follows. By sending a wireless control signal from the controller (not shown) to the transceiver unit 35, the flight of the multicopter 3 is controlled by the control unit 34. In addition, images from the camera 39 are sent to the transceiver unit 35 via the control unit 34, and the image signal is transmitted wirelessly to the display device (not shown). The operator can control the flight of the multicopter 3 by operating the controller while visually checking the image or looking at the display screen. Because the camera 39 faces upward, the display screen is useful when the multicopter 3 approaches the mounting base 1 and delicate positioning adjustments are required. In addition, the image from the camera 39 can also be used for automatic control of the multicopter 3.

When removing the fire detector main body 2 attached to the mounting base 1 installed on a ceiling panel C at a high altitude, the multicopter 3 is flown toward the fire detector attached to the ceiling panel C, as shown in Figure 9. Then, as shown in Figure 10, the contactor 381 of the multicopter 3 is brought into contact with the energized terminal 145 of the mounting base 1. The energized terminal 145 is provided in an arc shape with a certain width on the flange portion 12 of the mounting base 1, as shown in Figure 5, and the two energized terminals 145 are arranged in opposing positions with a space between them. The two contactors 381 of the multicopter 3 of Example 1 are arranged in positions where they will come into contact with the two energized terminals 145.

When the multicopter 3 is rotated to an appropriate position and the detector holder 37 is brought into contact with the fire detector main body 2, the two contacts 381 come into contact with the two conductive terminals 145, as shown in FIG. 10. A voltage is applied between the two contacts 381 to create a potential difference. When the contacts 381 come into contact with the conductive terminals 145, current flows from the contact springs 38 of the multicopter 3 to the conductive terminals 145 of the mounting base 1. The rectifier 146 shown in FIG. 8 then rectifies the current, causing the two actuators 143 to extend their plungers 143a. Regardless of which of the two conductive terminals 145 the high-voltage contact 381 contacts, the rectifier 146 generates a current in a direction that extends the plunger 143a. Because current flows only while the contact is in contact with the conductive terminals 145, consumption of the battery 36 can be reduced.

As shown in Figure 7(b), the tapered surface 144c of the spacing member 144 of the protruding plunger 143a pushes up the second blade receiving fixture 142, widening the gap between the first blade receiving fixture 141 and the second blade receiving fixture 142. This releases the contact portion 221 of the blade receiving fixture 22 from the first blade receiving fixture 141 and the second blade receiving fixture 142.

As shown in Figure 7(b), when the multicopter 3 is rotated with the contact portion 221 open, the fire detector main body 2 rotates with it due to the anti-slip effect of the rubber pad inside the detector holder 37. Then, as the fire detector main body 2 rotates, even with a small torque, the blade fitting 22 can be easily removed in the direction of the arrow M from between the spaced-apart first blade receiving bracket 141 and second blade receiving bracket 142. As the multicopter 3 rotates and the blade fitting 22 is removed from between the first blade receiving bracket 141 and second blade receiving bracket 142, the two contacts 381 move while contacting the arc-shaped current-carrying terminal 145, as shown in Figure 10. While the contacts 381 and current-carrying terminal 145 are in contact, current continues to flow to the actuator 143, and the first blade receiving bracket 141 and second blade receiving bracket 142 remain open even when the multicopter 3 is rotating.

When the multicopter 3 rotates further and one of the contacts 381 comes off the current-carrying terminal 145, the current is cut off and the plunger 143a returns to its original position. The spacing member 144 is then pulled in the direction opposite to the arrow P in Figure 6, bringing the first blade receiving bracket 141 and the second blade receiving bracket 142 into close proximity or contact, as shown in Figure 7(c). Furthermore, even if one of the contacts 381 comes off the current-carrying terminal 145 as the multicopter 3 descends, the state shown in Figure 7(c) is restored.

In this way, as shown in Figure 11, the fire detector body 2 can be stored in the detector holding portion 37 of the multicopter 3 and removed from the mounting base 1, which is attached at a high location. After removing the fire detector body 2, the multicopter 3 is lowered and the fire detector body 2 is retrieved.

When attaching the fire detector main body 2 to the mounting base 1, simply reverse the removal process. First, mount the fire detector main body 2 on the detector holder 37 of the multicopter 3, then raise the multicopter 3 and bring it close to the mounting base 1 as shown in Figure 11. Then, as shown in Figure 10, place the fire detector main body 2 into the fitting space 13 of the mounting base 1. This brings the two contacts 381 into contact with the current-carrying terminals 145, supplying current. This causes the plunger 143a of the actuator 143 to protrude, creating a gap between the first blade receiving bracket 141 and the second blade receiving bracket 142.

When the multicopter 3 is rotated in the opposite direction to when it was removed, the fire detector main body 2 rotates with it. Because the gap between the first blade receiving bracket 141 and the second blade receiving bracket 142 is large, even with a small torque, the contact portion 221 of the blade receiving bracket 22 enters between the first blade receiving bracket 141 and the second blade receiving bracket 142, as shown in Figure 7(b). At this time, the two contactors 381 slide while remaining in contact with the two conductive terminals 145, so the gap between the first blade receiving bracket 141 and the second blade receiving bracket 142 remains open.

When the multicopter 3 is lowered, as shown in Figures 6 and 7(a), the contact portion 221 of the blade fitting 22 is sandwiched between the first blade receiving fitting 141 and the second blade receiving fitting 142. This attaches the fire detector main body 2 to the mounting base 1 and establishes electrical continuity.

As described above, the multicopter 3 flies to the position where the mounting base 1 will be installed. Then, by supplying current from the contactor 381 of the multicopter 3 to the mounting base 1 via the power terminal 145, the actuator 143 is driven and the first blade receiving bracket 141 and the second blade receiving bracket 142 are separated. By rotating the multicopter 3 in this state, it is possible to insert or remove the blade receiving bracket 22 of the fire detector main body 2 into the space created by the separation.

In Example 1, a spacing member 144 was inserted between the first blade receiving fixture 141 and the second blade receiving fixture 142 to form a gap and release the blade fitting 22 of the fire detector main body 2. However, the blade fitting 22 may be released in other ways. Figure 12 shows the configuration of the mounting member 44 on the mounting base 4 of Example 2. The configuration of the mounting base 4 of Example 2 is the same as that of Example 1, except for the mounting member 44.

The mounting member 44 of Example 2 includes a first blade receiving fixture 441, a second blade receiving fixture 442, an actuator 443, and a clamping member 444. Figure 12(a) shows a state in which the first blade receiving fixture 441 and the second blade receiving fixture 442 are closed, while Figure 12(b) shows a state in which the first blade receiving fixture 441 and the second blade receiving fixture 442 are open. The first blade receiving fixture 441 has an upward bent portion 441a, and the second blade receiving fixture 442 has a downward bent portion 442a. One end of the bent portion 441a is provided with a tip 441b, and the other end with a sloped portion 441c. The bent portion 442a has one end with a tip 442b, and the other end with a sloped portion 442c.

In Example 2, the first blade receiving fixture 441 and the second blade receiving fixture 442 have their tip portions 441b and 442b tending to open due to their own spring properties. The clamping members 444 consist of two fixed cylinders, and press the inclined portion 441c of the first blade receiving fixture 441 and the inclined portion 442c of the second blade receiving fixture 442 from the outside with the two clamping members 444.

Figure 12(a) shows the state in which no current is flowing through the actuator 443, the plunger 443a is not protruding from the actuator 443, and the first blade receiving fixture 441 and the second blade receiving fixture 442 are pulled toward the actuator 443. In this state, the first blade receiving fixture 441 and the second blade receiving fixture 442 are pressed inward by the clamping member 444, so the gap between the tip 441b and the tip 442b is closed.

Figure 12(b) shows a state in which current is supplied from the multicopter 3, driving the actuator 443 and causing the plunger 443a to protrude. When the plunger 443a protrudes, the first blade receiving bracket 441 and the second blade receiving bracket 442 move to the left in Figure 12, and the inclined portions 441c and 442c also move to the left. As a result, the first blade receiving bracket 441 and the second blade receiving bracket 442, which had been trying to spread due to their own springiness, spread, and the tip portions 441b and 442b are separated. The blade receiving bracket 22 of the fire detector main body 2 can be inserted into or removed from the space created by this separation.

Figure 13 shows the mounting base 5 and multicopter 6 of Example 3. The mounting base 5 of Example 3 does not have a slanted peripheral portion like the flange portion 12 of Example 1. The mounting base 5 is circular, and the outer periphery of the mounting base 5 is formed as a side portion 52 with a cylindrical side surface. Electrical terminals 545 of the mounting member 54 are formed at two opposing locations on the side portion 52. One of these electrical terminals 545 is visible in Figure 13. Both of the pair of electrical terminals 545 are exposed to the outside.

The multicopter 6 of Example 3 is equipped with multiple propellers 61 and is capable of not only ascending, descending, and moving left and right, but also hovering and turning left and right. The multicopter 6 is equipped with a motor 62 that rotates the propellers 61, an ESC 63 that controls the rotation speed of the motor 62, a control unit 64, a transceiver unit 65, and a battery 66. The control unit 64 controls the rotation speed of the multiple motors 62, thereby performing flight control of the multicopter 6, such as hovering, ascending, descending, moving left and right, and turning left and right.

The multicopter 6 of Example 3 further includes a detector holder 67, a pair of contact springs 68, and a camera 69 on its upper part. The detector holder 67 is a cylindrical member with a recessed top, and the fire detector main body 2 can be placed in the recessed top. The top of the detector holder 67 has a cone-shaped recess, and is equipped with a rubber pad (not shown) inside to prevent slipping. A pair of contact springs 68 are provided on the outside of both sides of the detector holder 67, facing upward. A contact 681 is formed near the tip of the contact spring 68, which contacts the power terminal 545 on the inside, and a predetermined voltage is applied between the pair of contacts 681. The camera 69 is attached to the side of the detector holder 67, facing upward.

The multicopter 6 of Example 3 is the same as the multicopter 3 of Example 1, except for the structure of the contact springs 68. The contact springs 68 of the multicopter 6 are configured so that the contactors 681 clamp the springs from both sides. In Example 3, the current-carrying terminal 545 is brought into contact with the contactors 681 of the pair of contact springs 68 provided on the multicopter 6, allowing current to flow between them. The current flowing through the current-carrying terminal 545 opens the gap between the first blade receiving bracket (not shown) and second blade receiving bracket (not shown) of the mounting base 5, allowing the blade receiving bracket 22 of the fire detector main body 2 to be easily removed or attached.

By using a multicopter equipped with the mounting base of the above-described embodiment and the battery (power supply) required to drive the two blade receiving brackets apart, it is possible to remove and install the fire detector using a multicopter, even with a conventional fire detector body. Therefore, when installing or removing a fire detector installed at a high location, an operator can simply operate the multicopter from near the floor to install, remove, and transport the fire detector, improving the ease of installing and removing the detector and improving the safety and workability of inspection work.

The fire detector body and mounting base in the above embodiment are for a two-terminal type fire detector body with two blade fittings and a mounting base compatible with the two-terminal type fire detector body. However, they may also be used for a four-terminal type fire detector body and mounting base with four blade fittings. A four-terminal type mounting base uses four pairs of first blade receiving fittings and second blade receiving fittings.

Various mechanisms can be used to separate the first and second blade receiving fixtures. In addition, in Example 1, the lower first blade receiving fixture 141 is fixed, and the upper second blade receiving fixture 142 moves upward to separate them. However, as in the conventional example, the upper second blade receiving fixture may be fixed, and the lower first blade receiving fixture may move to separate them.

In the embodiment, two current-carrying terminals are provided, but multiple current-carrying terminals may be provided, and three or more may also be provided. The current-carrying terminals are preferably made of a material with a slippery surface. They may also be metal plates or multiple conductors along the circumference. Furthermore, the contacts may be anything that can pass current while sliding between them and the current-carrying terminals. For example, they may be near the tip of a curved linear spring, or may have a conductive brush attached.

In addition, the specific configuration is not limited to the embodiments, and design changes that do not deviate from the gist of the present invention are also included in the present invention. Furthermore, the above-mentioned embodiments can be combined by utilizing each other's technology, as long as there are no particular contradictions or problems with their purpose, configuration, etc.

1 Mounting base, 11 Mounting base body, 111 Back protrusion, 12 Flange portion, 13 Fitting space, 14 Mounting member, 141 First blade receiving bracket, 142 Second blade receiving bracket, 143 Actuator, 143a Plunger, 144 Spacer member, 144a Base, 144b Tip, 144c Tapered surface, 145 Current-carrying terminal, 146 Rectifier, 15 LED lamp, 19 Fixing member, 191 Pressing piece, 192 Square female screw, 193 Male screw,
2 Fire detector body, 21 Detector back panel, 22 Cutting metal fitting, 221 Contact part, 222 Middle part, 223 Fixing part, 224 Fixing screw hole,
3 Multicopter, 31 Propeller, 32 Motor, 33 ESC, 34 Control unit, 35 Transmitter/receiver unit, 36 Battery, 37 Sensor holder, 38 Contact spring, 381 Contactor, 39 Camera,
4 Mounting base, 44 Mounting member, 441 First blade receiving metal fitting, 441a Bent portion, 441b Tip portion, 441c Inclined portion, 442 Second blade receiving metal fitting, 442a Bent portion, 442b Tip portion, 442c Inclined portion, 443 Actuator, 443a Plunger, 444 Clamping member,
5 Mounting base, 51 Mounting base body, 52 Side portion, 54 Mounting member, 545 Electrical terminal,
6 Multicopter, 61 Propeller, 62 Motor, 63 ESC, 64 Control unit, 65 Transmitter/receiver unit, 66 Battery, 67 Sensor holder, 68 Contact spring, 681 Contactor, 69 Camera,
8 Mounting base, 81 Mounting base body, 811 Back protrusion, 82 Flange portion, 83 Fitting space, 84 Mounting member, 841 Contact spring, 841a Base portion, 841b End portion, 842 Blade receiving metal fitting, 89 Fixing member, 891 Pressing piece, 892 Square female screw, 893 Male screw,
C Ceiling board

Claims (4)

A mounting base for a fire detector body,
a first blade receiving bracket;
a second blade receiving fixture provided above the first blade receiving fixture;
an externally exposed current-carrying terminal that can receive a current supply from the outside;
an actuator connected to the first blade receiving fixture and the second blade receiving fixture and receiving a current through the current-carrying terminal;
The fire detector main body can be attached by sandwiching the blade fitting of the fire detector main body between the first blade receiving fitting and the second blade receiving fitting,
When a current is supplied to the current-carrying terminal, the actuator is driven to separate the first blade receiving fixture and the second blade receiving fixture from each other. 2. The mounting base according to claim 1, wherein the first blade receiving fixture is fixed, and the second blade receiving fixture is movable by the actuator in a direction away from the first blade receiving fixture. The mounting base is circular,
The mounting base according to claim 1 , wherein a plurality of the electrical terminals are provided on the outer periphery of the mounting base. A multicopter that can be equipped with the fire detector itself,
a mounting base that is fixed to the installation portion and to which the fire detector main body can be attached;
the multicopter has contacts for supplying current;
The mounting base is
a first blade receiving bracket;
a second blade receiving fixture provided above the first blade receiving fixture;
an externally exposed current-carrying terminal that can receive a current supply from the outside;
an actuator connected to the first blade receiving fixture and the second blade receiving fixture and receiving a current through the current-carrying terminal;
The multicopter flies to a position where the mounting base is installed,
A method for attaching and detaching a fire detector body, characterized in that, by supplying current from the contact of the multicopter to the mounting base via the current-carrying terminal, the actuator is driven to separate the first blade receiving bracket and the second blade receiving bracket, making it possible to insert or remove the blade of the fire detector body into or from the space created by the separation.