Fire detector and method for attaching a fire detector body

Abstract

To solve a problem that workers need to get close to a detector base when installing or removing a fire detector body, and install scaffolding to remove or install the fire detector body when the fire detector is installed in areas with high ceilings such as lobbies and entrances.SOLUTION: A fire detector includes a fire detector body and a detector base. The fire detector body has a fixing strip, which operates in a state in which the fire detector body is temporarily fixed to the detector base by a magnet to fix the same to the detector base. This allows the fire detector body to be removed from the detector base by a multicopter, such as a drone, or the fire detector body to be attached to the detector base.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a fire detector and a method for attaching a fire detector body, and more particularly to a fire detector and a method for attaching a fire detector body useful for facilities with high ceilings.

Background Art

[0002] Fire detectors such as smoke detectors and flame detectors are installed on ceilings or the like to detect smoke and flames and sense fires. Such a fire detector is installed by attaching a fire detector body to a detector base provided on a ceiling or the like. Then, during inspection or replacement, the fire detector body can be removed from the detector base and reinstalled.

[0003] In the invention of Patent Document 1, a pair of fitting terminals is provided on the detector base, and a pair of fitting fittings is provided on the detector body. Then, the detector body is inserted into the detector base and rotated so that the fitting fittings enter the fitting terminals, thereby mechanically and electrically fixing the detector body to the detector base. Also, by rotating it in the opposite direction, the detector body can be removed from the detector base. The fire detector body attached to the detector base can be removed by the operator rotating it by hand so that the fitting fittings come off the fitting terminals, releasing the electrical connection. Also, the operator can hold the fire detector body by hand, press it against the detector base, and rotate it in the opposite direction to when removing it, so that the fitting terminals fit into the fitting fittings, and the fire detector body can be attached to the detector base.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the invention of Patent Document 1, when installing or removing the fire detector main body, the operator needs to approach the detector base. Therefore, when installing a fire detector in a place with a high ceiling such as a lobby or an entrance, it was necessary to install a scaffold to remove or install the fire detector main body.

Means for Solving the Problems

[0006] The present invention includes a fire detector main body and a detector base. The fire detector main body has a fixing piece, and the fire detector main body is characterized in that the fixing piece operates and is fixed to the detector base while being temporarily fixed to the detector base by a magnet.

Effects of the Invention

[0007] According to the present invention, in a fire detector installed at a high place, a flying robot such as a multicopter can remove the fire detector main body from the detector base or attach the fire detector main body to the detector base.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] In this embodiment, an example of a smoke detector is shown as the fire detector, but other detectors may also be used. As will be described later, the detector base 1 is screwed to the ceiling board 6. And, as shown in FIG. 1, the fire detector body 2 is fixed to the detector base 1. The fire detector body 2 has a smoke inflow window 21 below when mounted on the ceiling, and a top plate 22 below that. And a switch 23 is provided at the lower center of the top plate 22. The switch 23 is equipped with an LED, which also serves as a confirmation light that lights up when the smoke detector operates or when it is lit during installation as will be described later.

[0010] As shown in FIG. 2, a cylindrical connection cylinder 24 is provided at the upper center of the fire detector body 2. And two fixing pieces 25 are provided on the connection cylinder 24. The fixing piece 25 is a rectangular iron plate, and a shaft 251 is fixed to the base. And it is biased by a spring (not shown) to fall outward. In FIG. 2(a) in the state of being fixed to the detector base 1, the fixing piece 25 is fallen outward. Also, in FIG. 2(b) before attaching to or after removing from the detector base 1, the fixing piece 25 extends upward. A ring-shaped permanent magnet 26 is provided below the outer peripheral surface of the connection cylinder 24.

[0011] As shown in FIG. 3, the detector base 1 is fixed to the ceiling board 6 of the ceiling to be installed by screws (not shown) from below. A hole 61 for wiring is opened in the ceiling board 6. Also, a hole 13 is provided at the center of the detector base 1. Due to the space when the fixing piece 25 falls as in FIG. 2(a), the wiring hole 61 is made larger than the hole 13. In FIG. 3, an iron ring 12 is provided around the hole 13. When the fire detector body 2 is fixed to the detector base 1, the connection cylinder 24 of the fire detector body 2 is located inside the iron ring 12 in the detector base 1.

[0012] When removing the fire detector main body 2 from the detector base 1 at a high location or attaching the fire detector main body 2 to the detector base 1, the fire detector main body 2 is carried by being mounted on a multicopter 3. As shown in FIG. 4, in order to mount the fire detector main body 2 on the multicopter 3, a holding adapter 4 is attached to the upper part of the multicopter 3. Then, the fire detector main body 2 is mounted on the holding adapter 4. A detachable release piece 41 is provided at the center of the holding adapter 4. Also, on the upper part of the multicopter 3, a camera 5 is fixed to the side part of the holding adapter 4 in a substantially upward direction. The video of the camera 5 is transmitted wirelessly to a controller (not shown) of the multicopter 3 and is displayed on the display part (not shown) of the controller.

[0013] When removing the fire detector main body 2 from the detector base 1 at a high location, the release piece 41 is attached to the holding adapter 4. Then, while an operator watches the video from the camera 5, the multicopter 3 is remotely operated by the controller so that the holding adapter 4 is brought into contact with the lower side of the fire detector main body 2. Then, the switch 23 of the fire detector main body 2 is pressed by the release piece 41, and the fixing piece 25 rises and is released from the fixed state as shown in FIG. 2(b). Since the raised fixing piece 25 is located inside the iron ring 12, the fire detector main body 2 comes off the holding adapter 4, and the fire detector main body 2 is mounted on the holding adapter 4. Then, by remotely operating the multicopter 3 from the controller and lowering it, the state of FIG. 4 is achieved, and the fire detector main body 2 can be transported from the detector base 1 at a high location.

[0014] Also, when attaching the fire detector body 2 to the detector base 1 at a high location, after removing the release piece 41 from the holding adapter 4, the fire detector body 2 is mounted on the holding adapter 4 in an attached posture. Then, while the operator watches the video from the camera 5, the multi-copter 3 is remotely operated by the controller so that the connection cylinder 24 of the fire detector body 2 shown in Fig. 2 enters the hole 13 of the detector base 1 shown in Fig. 3. At this time, the permanent magnet 26, which is the adsorption part of the fire detector body 2, is magnetically adsorbed to the iron ring 12, which is the attachment part of the detector base 1, and is temporarily fixed. In this temporarily fixed state, electrical connection is made between the detector base 1 and the fire detector body 2 by a terminal (not shown). Then, the fixing piece 25 falls outward by a spring, and the fire detector body 2 is fixed to the detector base 1. After the fire detector body 2 is fixed, the operator retrieves the multi-copter 3 by operating the controller. The holding adapter 4 has a structure (not shown) in which the head of the fire detector body 2 is press-fitted or fitted, and can hold the fire detector body 2 more firmly than the temporary fixing by the permanent magnet 26 described later.

[0015] In Fig. 5, the connection cylinder 24 and the permanent magnet 26 are shown in cross section. On the opposing surfaces inside the connection cylinder 24, one actuator 27, which is a self-holding solenoid, is provided respectively. The actuator 27 is provided at a position where it can push up the fixing piece 25 with the shaft 271. A ring-shaped permanent magnet 26 is provided below the outer surface of the connection cylinder 24. Fig. 5(a) shows the state where the fire detector body 2 is fixed to the detector base 1, and Fig. 5(b) shows the temporarily fixed state. In the fixed or temporarily fixed state, the iron ring 12 of the detector base 1 is located outside the connection cylinder 24. As shown in Fig. 5, the height of the connection cylinder 24 is formed to be approximately equal to the combined height of the height of the permanent magnet 26 and the height of the iron ring 12.

[0016] By the permanent magnet 26, which is the suction part, attaching to the iron ring 12, which is the adherend part, the fire detector main body 2 is temporarily fixed to the detector base 1 side. Also, in this embodiment, the iron ring 12 becomes a magnet, and the iron ring 12 attaches to the iron fixing piece 25. Therefore, the fire detector main body 2 can be fixed more firmly. Also, the temporary fixing by the permanent magnet 26 is a weak fixing, and when removing the fire detector main body 2, the temporary fixing is released by the self-weight of the fire detector main body 2 or the like.

[0017] As shown in FIG. 6, the shaft 251 of the fixing piece 25 is rotatably attached to the upper surface plate 241 at the upper end of the connection cylinder 24. Also, with the shaft 251, the fixing piece 25 is biased by a spring (not shown) so as to fall outward. In FIG. 6, the actuator 27 is hidden under the fixing piece 25.

[0018] When removing the fire detector body 2 from the detector base 1, the following method is used. First, a multicopter 3 having an empty holding adapter 4 is flown to the ceiling fire detector. At this time, a release piece 41 is attached to the holding adapter 4. In the fire detector, the fixing piece 25 is tilted outward as shown in Fig. 5(a), and the fire detector body 2 is fixed to the detector base 1. Then, when the multicopter 3 approaches the fire detector body 2 and the release piece 41 of the holding adapter 4 presses the switch 23 provided under the top plate 22 of the fire detector body 2, the shaft 271 projects upward from the actuator 27. At this time, the actuator 27 is operated by the electric power supplied from the detector base 1 to the fire detector body 2 via a terminal (not shown). The protruding shaft 271 pushes up the contact convex portion 252 of the fixing piece 25 against the force of the spring. As a result, as shown in Fig. 5(b), the fixing piece 25 rotates upward, and the fixing between the detector base 1 and the fire detector body 2 is released. Further, the head of the fire detector body 2 is press-fitted or fitted into the holding adapter 4. Then, when the multicopter 3 moves downward, the self-weight of the fire detector body 2 and the fact that the head of the fire detector body 2 is press-fitted or fitted release the temporary fixing between the permanent magnet 26 and the iron ring 12. The actuator 27 is a self-holding solenoid, and the shaft 271 remains protruding even when the power supply to the fire detector body 2 is cut off away from the detector base 1. After the release of the temporary fixing, the operator can remotely operate the multicopter 3 by a controller to carry and recover the fire detector body 2.

[0019] On one hand, when attaching the fire detector body 2 to the detector base 1, the following method is used. First, remove the release piece 41 from the holding adapter 4. Then, mount the fire detector body 2 on the holding adapter 4 and transport the multicopter 3 near the detector base 1 on the ceiling. When the multicopter 3 is lifted so that the connection cylinder 24 is inserted into the hole 13 of the detector base 1, the permanent magnet 26, which is the adsorption part of the fire detector body 2, is attracted to the iron ring 12, which is the adherend part, and is temporarily fixed by magnetic adsorption. As a result, the terminals (not shown) of the fire detector body 2 are connected to the detector wire ring (not shown) provided annularly on the detector base 1 and the common wire ring (not shown) provided outside thereof, and power is supplied from the detector base 1 to the fire detector body 2. And, due to the power supplied to the fire detector body 2 by the temporary fixing of the terminals, the self-holding solenoid operates, and the shaft 271 of the actuator 27 descends. When the shaft 271 descends, since the shaft 251 of the fixing piece 25 is biased by a spring, the fixing piece 25 falls outward as shown in FIGS. 5(a) and 6, and the fire detector body 2 is fixed to the detector base 1. As shown in FIG. 3, the ceiling board 6 is provided with a sufficiently wide wiring hole 61, and as shown in FIG. 5(a), the fixing piece 25 falls outward and reaches above the iron ring 12 of the detector base 1. Further, the iron fixing piece 25 is attracted to the iron ring 12 magnetized by the permanent magnet 26, so that the fixing of the fire detector body 2 to the detector base 1 becomes firm.

[0020] Note that the method of attaching the fire detector body 2 to the detector base 1 is not limited to the above method. A mounting method using the release piece 41 of the holding adapter 4 is also conceivable. In this case, in the above procedure, the fire detector body 2 is temporarily fixed using the permanent magnet 26. At this stage, the electrodes composed of the electrode terminals of the fire detector body 2 and the annular ring of the detector base 1 are in contact, and power is supplied to the fire detector body 2. And, by pressing the switch 23, the shaft 271 of the actuator 27 may be configured to descend.

[0021] When the fixing piece 25 contacts the iron ring 12 or the switch 23 is pressed, the confirmation light of the switch 23 will light up for a while. Therefore, the operator can confirm that the fire detector main body 2 is firmly fixed. In addition, since the switch 23 that also serves as the confirmation light is attached to the center of the lower end of the fire detector main body 2, it can be visually recognized from any direction. Although the confirmation light needs to be visible from the direction of the door, the fire detector main body 2 has no directionality when being installed. When the switch 23 is pressed, a signal is sent from the transmission circuit of the fire detector main body 2 (not shown) to a fire receiver (not shown), and the fire receiver side can also recognize the attachment / detachment of the fire detector main body 2.

[0022] As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included in the present invention. In addition, each of the above-described embodiments can be combined by diverting each other's technologies as long as there are no particular contradictions or problems in their purposes and configurations.

[0023] For example, when fixing, the fixing piece 25 does not necessarily need to be magnetically attached to the iron ring 12. In that case, the fixing piece 25 may be a non-magnetic material. Also, a temporary coupling may be performed by a magnet. The iron ring 12 may be provided on the fire detector main body 2, and the permanent magnet 26 may be provided on the detector base 1. The iron ring 12 may be made of a material other than iron as long as it is a magnetic material that adheres to the magnet, and it does not have to be annular. As long as at least one of the permanent magnet and the magnetic body is annular, the directionality is eliminated when installing the fire detector main body 2, making the installation easier. In the embodiment of the present invention, since the connection cylinder 24 is provided, the height of the fire detector main body 2 has increased. In order to reduce this height, a thin magnet such as a magnet sheet may be used for the temporary fixing magnet.

[0024] In the embodiment, the actuator 27 is a self - holding solenoid that holds the shaft 271 in a protruding state even when not powered. However, when removing the fire detector main body 2 from the detector base 1, if the fire detector main body 2 can be immediately pulled out with the shaft 271 protruding, it does not have to be a self - holding type. Also, taking advantage of the fact that it is a self - holding type, the tip of the shaft 271 may be connected to the fixing piece 25 with a wire. In this way, the fixing piece 25 can be pulled down by the shaft 271, and the spring that biases the fixing piece 25 can also be omitted. In the embodiment, it was described that after supplying power to the fire detector main body 2, the attachment by the fixing piece 25 is performed, but the operation of the fixing piece 25 may also be by a mechanical method. In this case, the switch 23 provided below the fire detector main body 2 is connected to the fixing piece 25 via a link mechanism. By pressing the switch 23 once, a stopper (not shown) is released and the fixing piece 25 expands laterally by a spring. By pressing the switch again, a mechanical mechanism that does not require power and returns the fixing piece 25 that has expanded laterally in the vertical direction may be provided.

[0025] In the embodiment, when the multicopter 3 moves downward, the temporary fixation between the permanent magnet 26 and the iron ring 12 is released due to the self - weight of the fire detector main body 2 and the fact that the head of the fire detector main body 2 is press - fitted or fitted. However, it may be set as a sufficiently weak temporary fixation so that the temporary fixation is released only by the self - weight without press - fitting or fitting. Also, in order to improve the ease of removing the fire detector main body 2 from the detector base 1, a mechanism may be separately provided such that when the switch 23 below the fire detector main body 2 is pressed, the distance between the permanent magnet 26 and the iron ring 12 can be temporarily separated.

[0026] As described in the prior art, the attachment of the fire detector main body 2 and the detector base 1 is performed by rotational engagement. On the other hand, the drone which is a multicopter 3 is likely to apply force in the vertical direction, but it is difficult to apply a rotational force, and it has been considered difficult to remove the fire detector main body 2 attached by rotational engagement with the drone. However, in the present embodiment, since the fire detector main body 2 is attached to the detector base 1 without rotating it, it is easy to attach and detach the fire detector main body 2 using the drone. In particular, since the electrical connection between the fire detector main body 2 and the detector base 1 is performed using an annularly formed electrode, there is no need to rotate the fire detector main body 2 at all during attachment.

Explanation of Signs

[0027] 1 Detector base, 12 Iron ring, 13 Hole, 2 Fire detector main body, 21 Smoke inlet window, 22 Top plate, 23 Switch, 24 Connection cylinder, 241 Upper panel, 25 Fixed piece, 251 Shaft, 252 Contact convex part, 26 Permanent magnet, 27 Actuator, 271 Shaft, 3 Multicopter, 4 Holding adapter, 41 Release piece, 5 Camera, 6 Ceiling plate, 61 Hole

Claims

1. A fire detector main body, and a detector base, characterized in that: The fire detector main body has a fixing piece, and the fire detector main body is fixed to the detector base by operating the fixing piece in a state where the fire detector main body is temporarily fixed to the detector base by a magnet.

2. The fire detector according to claim 1, wherein the fixing piece is released from the fixed state by pressing a switch.

3. The fire detector according to claim 1 or 2, wherein the fixing piece is operated by electric power supplied from the detector base to the fire detector main body in a state where the fire detector main body is temporarily fixed to the detector base.

4. The fire detector main body has a confirmation lamp, and the confirmation lamp lights up when the fire detector main body is fixed by the fixing piece. The fire detector according to any one of claims 1 to 3.

5. An attachment method for attaching a fire detector main body to a ceiling to be installed, comprising: Mounting the fire detector main body on the upper part of a multicopter in an attachment posture, Remotely operating the multicopter to transport the fire detector main body to a detector base fixed to the ceiling, Temporarily fixing the fire detector main body by magnetically adsorbing an adsorption part provided on the fire detector main body to an adherend part provided on the detector base, and then operating a fixing piece provided on the fire detector main body to fix the fire detector main body to the detector base. An attachment method for a fire detector main body.

Images