Fire detector and how to attach and detach the detector body

Abstract

To facilitate attachment / detachment of a sensor body to / from a base part.SOLUTION: A fire sensor includes: a base part having a magnet and attached to an attachment part; and a sensor body having a magnet making the magnet of the base part repulsive and removably attached to the base part. An engagement state between the sensor body and the base part is kept according to a position of the magnet of the sensor body, or the engagement state between the sensor body and the base part is released when the engagement part is operated.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fire detector, and, This relates to a method for attaching and detaching the sensor body. [Background technology]

[0002] Conventionally, there are fire detectors that are attached to the ceiling, wall, or the like of a building. The fire detector has a base that is attached to a mounting portion such as the ceiling or wall, and a detector main body that is attached to the base. The detector main body is attached to or detached from the base during installation, inspection, replacement, or the like. As a method for fixing the detector main body to the base, a fire detector equipped with a so-called twist lock method has been proposed in which the base and detector main body are rotated relative to each other in the circumferential direction to move their engaging portions closer to or farther from each other, thereby locking or unlocking them (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-105848 Summary of the Invention [Problem to be solved by the invention]

[0004] When attaching or detaching a detector body to a base part installed on a mounting part such as a ceiling at a high altitude, for example, a worker operates a long rod equipped with an attachment / detachment jig at the tip. Recently, the use of so-called drones has been considered for work at high altitudes, and it is conceivable to use drones to attach or detach the detector body to or from the base part. When attaching or detaching a twist-lock type fire detector such as the fire detector disclosed in Patent Document 1, a force (torque) is required to rotate the detector body while it remains attached to the base part. Therefore, when attaching or detaching a detector body installed at a high altitude using a long rod or drone, it is difficult to apply a rotational force to the detector body by operating the rod or drone, making it difficult to attach or detach the detector body.

[0005] The present invention solves the above-mentioned problems and provides a fire detector that allows the detector body to be easily attached and detached to and from the base portion. Reach The purpose is to provide a method for attaching and detaching the sensor body. [Means for solving the problem]

[0006] The fire detector according to the present invention comprises a base portion having a magnet and attached to a mounting portion, and a detector body having a magnet that repels the magnet in the base portion and detachably attached to the base portion, and the magnet in the base are not facing each other horizontally. The engagement state between the sensor body and the base portion is maintained, When the magnet in the sensor body and the magnet in the base face each other horizontally, The engaging portion operates to release the engagement between the sensor body and the base portion.

[0008] The method for attaching and detaching a detector body according to the present invention is a method for attaching and detaching a detector body using a fire detector comprising: a base part having a magnet and attached to an attachment part; and a detector body having a magnet that repels the magnet in the base part and that is detachably attached to the base part, wherein at least one of the base part and the detector body has an identification mark part that displays a mark associated with the detector body; a detacher having a detacher-side magnet that acts on the magnet in the detector body to move the position of the magnet in the detector body; and an information reading part that reads the identification mark part, and when the detector body is attached to the base part or when the detector body is detached from the base part, the method includes verifying the target detector body based on information read from the identification mark part by the information reading part. Based on the result of the verification, the mechanism for attaching and detaching the device is activated. It is something. [Effects of the Invention]

[0009] According to the present invention, the engagement between the detector body and the base is maintained depending on the position of the magnet in the detector body, or the engagement part is activated to release the engagement between the detector body and the base. Therefore, the fire detector can be easily attached and detached from the base. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing the configuration of a fire detector attachment / detachment system according to an embodiment; [Figure 2] 1 is a schematic diagram conceptually showing the internal configuration of a fire detector attachment / detachment system according to an embodiment, as viewed from the side; [Figure 3] 1 is a schematic diagram conceptually showing the internal configuration of a fire detector according to an embodiment, as viewed from above; [Figure 4] 1 is a schematic diagram conceptually showing the internal configuration of a fire detector detachable system according to an embodiment when the detachable device is brought close to the detector main body. FIG. [Figure 5] 1 is a conceptual diagram showing a method for attaching and detaching a detachable device in a fire detector attaching and detaching system according to an embodiment. [Figure 6] 1 is a conceptual diagram illustrating an example of a fire detector attachment / detachment system according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and various modifications are possible without departing from the spirit of the present invention. Furthermore, the present invention includes all possible combinations of the configurations shown in the following embodiments. Furthermore, the device shown in the drawings is an example of the device of the present invention, and the device of the present invention is not limited to the device shown in the drawings. Furthermore, in each drawing, parts with the same reference numerals are the same or equivalent, and this is common throughout the entire specification.

[0012] Embodiment [Configuration of fire detector detachable system 200] Fig. 1 is a schematic diagram showing the configuration of a fire detector attachment / detachment system 200 according to an embodiment. Note that the arrow Z shown in Fig. 1 indicates the up-down direction, and the arrow X indicates the horizontal direction. The fire detector attachment / detachment system 200 has a fire detector 100 and a detacher 30 used to attach and detach the detector main body 20 of the fire detector 100 to and from the base part 10. The numbers of fire detectors 100 and detachers 30 shown in the figure are merely an example, and the numbers are not limited to those shown.

[0013] [Configuration of fire detector 100] The fire detector 100 constitutes part of a so-called "automatic fire alarm system" that detects a fire when it breaks out and transmits that information to a receiver to alert the building of the occurrence of a fire. The fire detector 100 is, for example, a smoke detector, a heat detector, a flame detector, or a combination detector. The fire detector 100 may be a detector with an alarm function that includes a speaker or the like and issues an alarm, or a detector with an interlocking alarm function that constitutes a system that sounds alarms not only for the detector that detects a fire but also for multiple detectors.

[0014] As shown in FIG. 1, the fire detector 100 includes a base portion 10 fixed to a mounting portion 50 such as a ceiling surface, and a detector main body 20 attached to the base portion 10.

[0015] When installing the fire detector 100 in place of an existing fire detector 100 that is due for replacement, the existing base part 10 can be reused and the detector main body 20 can be attached to the base part 10.

[0016] The base unit 10 and the sensor main body 20 will be described with reference to Figures 2 to 4. Figure 3 is a cross-sectional view taken along line AA in Figure 2, seen in the direction of the arrow.

[0017] [Configuration of base unit 10] The base portion 10 is attached to a mounting portion 50 such as a ceiling surface by a fixing means such as screws, and is fixed to the mounting portion 50. The base portion 10 is used to install the sensor main body 20 on the mounting portion 50. The base portion 10 has a bottom plate 10a and a base peripheral wall portion 10b.

[0018] The bottom plate 10a is a plate-like member that forms the bottom of the base portion 10 and has a back surface attached to the mounting portion 50. The bottom plate 10a is, for example, a disk-shaped member. Note that the shape of the bottom plate 10a is not limited to a disk shape, and it may be another shape, such as a polygonal shape in a plan view.

[0019] The base peripheral wall portion 10b forms the peripheral wall of the base portion 10. The base peripheral wall portion 10b is provided so as to rise from the peripheral edge of the bottom plate 10a toward the front surface side, which is the engagement surface side with the sensor main body 20. The base peripheral wall portion 10b is formed, for example, in a cylindrical shape. Note that the base portion 10 does not necessarily have to have the base peripheral wall portion 10b due to factors such as the shape of the sensor main body 20.

[0020] The base portion 10 has a base-side engaging portion 11 that engages with a sensor-side engaging portion 21 (described later) to support the sensor main body 20, and a spring portion 14 that biases the base-side engaging portion 11 toward the sensor-side engaging portion 21. The base portion 10 also has a base-side magnet portion 12, which is a magnet arranged on the base portion 10 and moves the base-side engaging portion 11 by repelling a sensor-side magnet portion 22 (described later).

[0021] The base-side engaging portion 11 includes a claw-shaped tip portion 11a that engages with the sensor-side engaging portion 21. The base-side engaging portion 11 is, for example, a box-shaped member that houses the base-side magnet portion 12 inside. Note that the base-side engaging portion 11 is not limited to a box-shaped member as long as it has a claw-shaped tip portion 11a that engages with the sensor-side engaging portion 21 and is formed integrally with the base-side magnet portion 12. The base-side engaging portion 11 is provided integrally with the base-side magnet portion 12, and moves integrally with the base-side magnet portion 12.

[0022] As shown by arrow E in Figure 2, the base-side engaging portion 11 moves closer to the sensor-side engaging portion 21 due to the bias of the spring portion 14 and comes into contact with the sensor-side engaging portion 21. The base-side engaging portion 11 is pressed towards the sensor-side engaging portion 21 by the compression reaction force of the spring portion 14. The base-side engaging portion 11 is pressed against the sensor-side engaging portion 21 due to the bias of the spring portion 14, and engages with the sensor-side engaging portion 21 to support the sensor main body 20.

[0023] As shown by arrow G in Figure 4, the base-side engagement part 11 moves away from the sensor-side engagement part 21 due to the repulsion of the base-side magnet part 12 against the sensor-side magnet part 22, which will be described later. The base-side engagement part 11 moves away from the sensor-side engagement part 21 due to the repulsion of the base-side magnet part 12 against the sensor-side magnet part 22, and the engagement state with the sensor-side engagement part 21 is released.

[0024] The spring portion 14 biases the base-side engagement portion 11 and the base-side magnet portion 12 in a direction that brings them closer to the sensor-side engagement portion 21. The spring portion 14 is disposed on the opposite side of the sensor-side engagement portion 21 with respect to the base-side engagement portion 11 and the base-side magnet portion 12. The spring portion 14 is a compression spring, for example a compression coil spring, which receives a load in the compression direction, compresses it, and utilizes the reaction force.

[0025] One end of the spring portion 14 is fixed to the base portion 10, and the other end of the spring portion 14 is fixed to the base-side engaging portion 11 or the base-side magnet portion 12. In the present embodiment, the spring portion 14 is arranged so as to expand and contract along the circumferential direction of the base portion 10, as shown in Fig. 3. In the fire detector 100, the base-side engaging portion 11 and the detector-side engaging portion 21 engage with each other in the circumferential direction around the center of the base portion 10.

[0026] The engagement direction between the base-side engaging portion 11 and the detector-side engaging portion 21 is not limited to the circumferential direction. For example, the spring portion 14 may be arranged to expand and contract along the radial direction of the base portion 10. In this case, in the fire detector 100, the base-side engaging portion 11 and the detector-side engaging portion 21 engage in the radial direction centered on the center of the base portion 10.

[0027] The base-side magnet portion 12 is, for example, a permanent magnet. The base-side magnet portion 12 is formed integrally with the base-side engagement portion 11 and repels the sensor-side magnet portion 22, moving the base-side engagement portion 11 in a direction away from the sensor-side magnet portion 22 and the sensor-side engagement portion 21.

[0028] 2 and 3, the base-side magnet section 12 is arranged so that its north pole is on the side of the sensor-side magnet section 22 and sensor-side engagement section 21 and its south pole is on the side of the spring section 14, but the arrangement of the magnetic poles is not limited to this. The base-side magnet section 12 only needs to be arranged so that the magnetic pole on the side facing the sensor-side magnet section 22 is the same magnetic pole as the sensor-side magnet section 22 so that it repels the sensor-side magnet section 22.

[0029] The base portion 10 has a base-side guide portion 13. The base-side guide portion 13 guides the base-side engagement portion 11 and regulates the direction of movement of the base-side engagement portion 11. The base-side engagement portion 11 is guided by the base-side guide portion 13 and moves horizontally due to the biasing force of the spring portion 14 and the action of the sensor-side magnet portion 22. Note that the horizontal direction does not have to be strictly horizontal, but may also be a direction slightly inclined relative to the horizontal direction. The base-side guide portion 13 is formed, for example, from a cylindrical member.

[0030] 2 and 3, the base-side guide portion 13 is formed in a cylindrical shape with a bottom, and houses therein the spring portion 14, the base-side magnet portion 12, and the base-side engagement portion 11. One end of the spring portion 14 is fixed to the base portion 10 via the wall portion of the base-side guide portion 13, and the other end of the spring portion 14 is fixed to the base-side engagement portion 11.

[0031] The base-side guide portion 13 is not limited to a cylindrical member as long as it has a shape that can guide the base-side engaging portion 11. For example, the base-side guide portion 13 may be made up of a plurality of rods or plates that are provided to rise from the bottom plate 10a of the base portion 10, as long as it has a shape that can guide the base-side engaging portion 11.

[0032] The base-side guide portion 13 is fixed to the bottom plate 10a or the base peripheral wall portion 10b of the base portion 10 using a member such as a rib (not shown). Although the manner in which the base-side guide portion 13 is fixed to the base portion 10 is not shown in Figures 2 and 4, the base-side guide portion 13 is fixed to the base portion 10.

[0033] The base portion 10 has a positioning member such as a protrusion (not shown) for preventing the base-side engaging portion 11 from protruding too far from the base-side guide portion 13. Such a positioning member determines the position of the base-side engaging portion 11 when the sensor-side engaging portion 21 is engaged with the base-side engaging portion 11.

[0034] [Configuration of the sensor main body 20] The detector main body 20 is provided with functional parts for detecting the occurrence of a fire, such as sensors (not shown) for detecting smoke, heat, or flames. The detector main body 20 is detachably attached to the base part 10. The detector main body 20 is attached to the base part 10 by the detector-side engaging part 21 engaging with the base-side engaging part 11. In the present embodiment, the detector main body 20 has a bottom wall part 20a and a main body peripheral wall part 20b.

[0035] The bottom wall portion 20a is a plate-like member that forms the bottom of the sensor main body 20 and whose back side faces the bottom plate 10a of the base portion 10. The bottom wall portion 20a is, for example, a disk-shaped member. The shape of the bottom wall portion 20a is not limited to a disk shape and may be other shapes, such as a polygonal shape in a plan view. When the sensor main body 20 of the fire sensor 100 is attached to the base portion 10, a space is formed between the bottom wall portion 20a of the sensor main body 20 and the bottom plate 10a of the base portion 10.

[0036] The main body peripheral wall portion 20b forms the peripheral wall of the sensor main body 20. The main body peripheral wall portion 20b is provided so as to rise from the peripheral edge of the bottom wall portion 20a to the back side, which is the engagement surface side with the base portion 10. The main body peripheral wall portion 20b is formed, for example, in a cylindrical shape.

[0037] The sensor body 20 does not have to be formed so that the bottom wall 20a and the main body peripheral wall 20b are clearly distinguishable, and the bottom wall 20a and the main body peripheral wall 20b may be integrally formed as a protective cover, forming a box-like shape as a whole. In this case, for example, the protective cover formed by the bottom wall 20a and the main body peripheral wall 20b may be formed in a bowl shape, or in a triangular shape tapering downward in vertical cross section.

[0038] The sensor main body 20 has a sensor side engagement portion 21 that engages with the base portion 10, and a sensor side magnet portion 22, which is a magnet arranged in the sensor main body 20 and moves in and out in the vertical direction from within the sensor main body 20, and acts on the base side magnet portion 12 of the base portion 10 when it comes out of the sensor main body 20.

[0039] The sensor-side engaging portion 21 serves as a claw that engages with the base-side engaging portion 11. The sensor-side engaging portion 21 is fixed to the bottom wall portion 20a or the main body peripheral wall portion 20b. The sensor-side engaging portion 21 is provided at a position that faces the base-side engaging portion 11 in the horizontal direction when the sensor main body 20 is attached to the base portion 10. The sensor-side engaging portion 21 may be formed integrally with, for example, a sensor-side guide portion 23 described below.

[0040] As shown by arrow E in Figure 2, the sensor-side engaging portion 21 comes into contact with the base-side engaging portion 11, which has moved closer to the sensor-side engaging portion 21 due to the bias of the spring portion 14. The sensor-side engaging portion 21 engages with the base-side engaging portion 11, which has been pressed against the sensor-side engaging portion 21 due to the bias of the spring portion 14. The sensor main body 20 is supported by the base portion 10 due to the engagement between the sensor-side engaging portion 21 and the base-side engaging portion 11.

[0041] The sensor-side magnet portion 22 is, for example, a permanent magnet. The sensor-side magnet portion 22 repels the base-side magnet portion 12 of the base portion 10. The sensor-side magnet portion 22 repels the base-side magnet portion 12 formed integrally with the base-side engaging portion 11, causing the base-side engaging portion 11 to move in a direction away from the sensor-side magnet portion 22 and the sensor-side engaging portion 21.

[0042] 2 and 3, the sensor-side magnet section 22 is arranged so that its north pole is on the side of the base-side magnet section 12 and base-side engagement section 11 and its south pole is on the opposite side of the base-side magnet section 12 and base-side engagement section 11, but the arrangement of the magnetic poles is not limited to this. The sensor-side magnet section 22 only needs to be arranged so that the magnetic pole on the side facing the base-side magnet section 12 is the same as the magnetic pole of the base-side magnet section 12 so that the base-side magnet section 12 repels it.

[0043] The sensor main body 20 has a sensor-side guide portion 23. The sensor-side guide portion 23 guides the movement of the sensor-side magnet portion 22 and regulates the movement direction of the sensor-side magnet portion 22. The sensor-side magnet portion 22 is guided by the sensor-side guide portion 23 and moves in the vertical direction by the action of the detacher-side magnet portion 31 of the detacher 30, which will be described later. The sensor-side guide portion 23 is formed, for example, from a cylindrical member.

[0044] 2 and 3, the sensor-side guide portion 23 is formed in a cylindrical shape and houses the sensor-side magnet portion 22 therein. The sensor-side guide portion 23 is not limited to a cylindrical member as long as it has a shape that can guide the sensor-side magnet portion 22. For example, the sensor-side guide portion 23 may be made up of a plurality of rods or plates that are provided to rise from the bottom wall portion 20a of the sensor main body 20, as long as it has a shape that can guide the sensor-side magnet portion 22.

[0045] The sensor side guide portion 23 is fixed to the bottom wall portion 20a or the main body peripheral wall portion 20b of the sensor main body 20 using a member such as a rib (not shown). Although the manner in which the sensor side guide portion 23 and the sensor main body 20 are fixed is not shown in Figures 2 to 4, the sensor side guide portion 23 is fixed to the sensor main body 20.

[0046] The sensor main body 20 has a positioning member 23a for preventing the sensor-side magnet part 22 from coming off the sensor-side guide part 23. The positioning member 23a determines the position of the sensor-side magnet part 22 when the sensor-side engaging part 21 and the base-side engaging part 11 are disengaged. The positioning member 23a is a member provided for stopping the movement of the sensor-side magnet part 22, which is repelled by the detachable-device-side magnet part 31 and moves upward, at a specific position.

[0047] The positioning member 23a is provided, for example, in a part of the sensor-side guide portion 23, near the end of the sensor-side guide portion 23 opposite the bottom wall portion 20a. The positioning member 23a may be formed, for example, in the shape of a plate or a protrusion, and its shape is not limited as long as it can regulate the movement of the sensor-side magnet portion 22.

[0048] In the fire detector 100, the detector main body 20 and the base part 10 are kept engaged with each other depending on the position of the detector-side magnet part 22 of the detector main body 20. In the fire detector 100, when the detector-side magnet part 22 of the detector main body 20 is positioned downward, in other words, when the detector-side magnet part 22 is placed on the bottom wall part 20a, the magnetic force of the detector-side magnet part 22 does not affect the base-side magnet part 12.

[0049] Therefore, when the fire detector 100 is in a state where the detector-side magnet portion 22 of the detector main body 20 is positioned downward as shown in Figure 2, the base-side engagement portion 11 is biased by the action of the spring portion 14 of the base portion 10, and the engagement state between the base-side engagement portion 11 and the detector-side engagement portion 21 is maintained.

[0050] In the fire detector 100, the engagement portion is activated depending on the position of the detector-side magnet portion 22 of the detector main body 20, and the engagement between the detector main body 20 and the base portion 10 is released. The engagement portion here refers to the base-side engagement portion 11. Activation of the engagement portion refers to the movement of the base-side engagement portion 11, which will be described later. When the detector-side magnet portion 22 of the detector main body 20 is positioned upward, in other words, when the detector-side magnet portion 22 is raised from the bottom wall portion 20a and positioned above the bottom wall portion 20a, the magnetic force of the detector-side magnet portion 22 affects the base-side magnet portion 12.

[0051] In the fire detector 100, when the detector-side magnet part 22 of the detector main body 20 is positioned upward, the action of the detector-side magnet part 22 repels the base-side magnet part 12, and the base-side engaging part 11 moves together with the base-side magnet part 12. Therefore, in the fire detector 100, when the detector-side magnet part 22 of the detector main body 20 is positioned upward as shown in Figure 4, the action of the detector-side magnet part 22 releases the engagement between the base-side engaging part 11 and the detector-side engaging part 21.

[0052] Here, the engagement portion between the base-side engagement portion 11 and the detector-side engagement portion 21 is referred to as the engagement portion 110. As shown in Fig. 3, the fire detector 100 has four engagement portions 110. Note that the number of engagement portions 110 is not limited to four. The number of engagement portions 110 may be five or more, or may be three or less, as long as the detector main body 20 can be supported by the base portion 10.

[0053] [Configuration of the detachable device 30] The fire detector attachment / detachment system 200 includes an attachment / detachment device 30 that is used when attaching the detector main body 20 to the base portion 10 or when detaching the detector main body 20 from the base portion 10 .

[0054] The detachable unit 30 has a detachable unit-side magnet part 31 that acts on the sensor-side magnet part 22 of the sensor main body 20 to move the position of the sensor-side magnet part 22 of the sensor main body 20 when the sensor main body 20 is attached to the base part 10 or when the sensor main body 20 is detached from the base part 10. In other words, the detachable unit-side magnet part 31 of the detachable unit 30 moves the sensor-side magnet part 22 up and down depending on the distance from the sensor-side magnet part 22 of the sensor main body 20.

[0055] The detacher 30 is formed in a box shape and houses the detacher-side magnet part 31 inside. There may be one or more detachers 30. When there is one detacher 30, for example, the detacher 30 is formed in a box body that is annular in plan view, and the number of detacher-side magnet parts 31 arranged inside corresponds to the number of sensor-side magnet parts 22. When there are multiple detachers 30, for example, the detacher 30 is formed in a box body that is rectangular parallelepiped or arc-shaped in plan view, and houses one detacher-side magnet part 31 inside, and the number of detachers 30 arranged corresponds to the number of sensor-side magnet parts 22.

[0056] The shape of the detachable device 30 is not limited, but it at least has a top surface 30a to which the sensor main body 20 is attached when attaching or detaching the sensor main body 20. The top surface 30a abuts against the sensor main body 20 and the sensor main body 20 is placed when attaching the sensor main body 20 to the base part 10 or when detaching the sensor main body 20 from the base part 10. The detachable device 30 moves the sensor side magnet part 22 in the up and down direction by utilizing the magnetic field of the detachable device side magnet part 31 generated on the top surface 30a.

[0057] The detachable-side magnet portion 31 is a permanent magnet or an electromagnet. When the detachable-side magnet portion 31 is an electromagnet, the power source may be inside or outside the detachable-side magnet portion 31. The detachable-side magnet portion 31 is used to vertically move the sensor-side magnet portion 22 arranged inside the sensor main body 20. The detachable-side magnet portion 31 is arranged so that the sensor-side magnet portion 31 and the sensor-side magnet portion 22 are in the same position in the circumferential direction of the sensor main body 20 when the detachable-side magnet portion 31 is in contact with the sensor main body 20. In other words, when the detachable-side magnet portion 31 is in contact with the sensor main body 20, the detachable-side magnet portion 31 is arranged in a position where the detachable-side magnet portion 31 and the sensor-side magnet portion 22 overlap in a plan view, and the detachable-side magnet portion 31 is arranged below the sensor-side magnet portion 22.

[0058] 4, when the detachable device 30 is brought into contact with the sensor main body 20 while the magnetic field of the detachable device-side magnet part 31 is generated on the top surface 30a of the detachable device 30, the sensor-side magnet part 22 repels the detachable device-side magnet part 31, rises from the bottom wall part 20a, and moves upward. The sensor-side magnet part 22 that has moved above the bottom wall part 20a acts on the base-side magnet part 12, repelling it.

[0059] The detachable-side magnet section 31 is arranged so that its north pole is on the side where the base-side magnet section 12 is located and its south pole is on the side where the base-side magnet section 12 is not located in the radial direction of the sensor main body 20, but the arrangement of the magnetic poles is not limited to this. The detachable-side magnet section 31 only needs to be arranged so that the magnetic pole on the side facing the sensor-side magnet section 22 in the vertical direction is the same as that of the sensor-side magnet section 22 so that the sensor-side magnet section 22 repels it.

[0060] 2, when the magnetic field of the detacher-side magnet part 31 of the detacher 30 is not applied to the sensor-side magnet part 22, the sensor-side magnet part 22 is located at the bottom inside the sensor main body 20 and placed on the bottom wall part 20a. The sensor-side magnet part 22, located at the bottom inside the sensor main body 20 and placed on the bottom wall part 20a, does not act on the base-side magnet part 12, and the base-side magnet part 12 is moved by the bias of the spring part 14 toward the arrangement side of the sensor-side engagement part 21.

[0061] The strength of the magnetic field generated by the detacher-side magnet part 31 on the top surface part 30a can be adjusted, for example, by moving the detacher-side magnet part 31 up and down inside the detacher 30. To move the detacher-side magnet part 31 up and down, a mechanism for moving the detacher-side magnet part 31 up and down is provided inside the detacher 30, and an operator moves the detacher-side magnet part 31 up and down by operating this mechanism.

[0062] The mechanism for moving the detachable magnet portion 31 up and down may be any known method and is not limited to that described in the embodiments. For example, a spring may be attached to the detachable magnet portion 31, which is pulled downward. The detachable magnet portion 31 is then held downward by a fastener, and an operator may remove the fastener to move the detachable magnet portion 31 upward. Alternatively, the detachable magnet portion 31 may be provided with a lever-like mechanism, and the operator may operate the mechanism to move the detachable magnet portion 31 up and down. Alternatively, a rod-shaped member may be attached to the detachable magnet portion 31, and the operator may move the rod-shaped member up and down to move the detachable magnet portion 31 up and down. The operator's operation described above may be performed by a machine, such as by remote control, or by predetermined control using a control device.

[0063] If the detachable-side magnet part 31 is moved upward inside the detachable-side magnet part 30 and brought closer to the top surface part 30a, the magnetic field of the detachable-side magnet part 31 acting on the sensor-side magnet part 22 will become stronger. In this case, the sensor-side magnet part 22 will be affected more by the repulsive force of the magnetic force than by the gravity of the detachable-side magnet part 31, and will move upward and come out of the sensor main body 20.

[0064] The state in which the sensor-side magnet part 22 protrudes from the sensor main body 20 refers to, for example, a state in which the sensor-side magnet part 22 is disposed at the upper end of the main body peripheral wall part 20b or at a position higher than the upper end of the main body peripheral wall part 20b in the vertical direction. However, the state in which the sensor-side magnet part 22 protrudes from the sensor main body 20 is not limited to this state, and the sensor-side magnet part 22 may also be a state in which the sensor-side magnet part 22 is disposed at a position facing the base-side magnet part 12 in the horizontal direction. Furthermore, the state in which the sensor-side magnet part 22 floats up from the bottom wall part 20a and is positioned above the bottom wall part 20a may also be referred to as the state in which the sensor-side magnet part 22 protrudes from the sensor main body 20.

[0065] Furthermore, if the detachable-device-side magnet part 31 is moved downward inside the detachable device 30 and away from the top surface part 30a, the magnetic field of the detachable-device-side magnet part 31 acting on the sensor-side magnet part 22 will be weakened. In this case, the sensor-side magnet part 22 will move downward under the influence of gravity rather than the repulsive force of the detachable-device-side magnet part 31, and will enter the sensor main body 20.

[0066] The state in which the sensor-side magnet part 22 is inside the sensor main body 20 refers to, for example, a state in which the sensor-side magnet part 22 is arranged in a position lower than the position of the upper end part of the main body peripheral wall part 20b in the up-down direction. However, the state in which the sensor-side magnet part 22 is inside the sensor main body 20 is not limited to this state, and the sensor-side magnet part 22 may also be arranged in a state lower than the position facing the base-side magnet part 12 in the horizontal direction. Furthermore, the state in which the sensor-side magnet part 22 is placed on the bottom wall part 20a may also be referred to as the state in which the sensor-side magnet part 22 is inside the sensor main body 20.

[0067] Although the method of moving the detector-side magnet part 22 up and down has been described as a method of moving the detector-side magnet part 31 up and down, the method of moving the detector-side magnet part 22 up and down is not limited to moving the detector-side magnet part 31 itself up and down. For example, in the fire detector detachment system 200, the detector-side magnet part 31 may be configured as an electromagnet, and the detector-side magnet part 22 may be moved up and down by energizing the detector-side magnet part 31 or by stopping the current flowing through the detector-side magnet part 31. The detector-side magnet part 22 repels the detector-side magnet part 22 by energizing the detector-side magnet part 31, causing the detector-side magnet part 22 to move upward, and the magnetic field that repels the detector-side magnet part 22 is eliminated by stopping the current flowing through the detector-side magnet part 31, causing the detector-side magnet part 22 to move downward.

[0068] Furthermore, the detacher 30 may raise and lower the sensor-side magnet part 22 by changing the magnetic pole of the detacher-side magnet part 31. For example, the detacher 30 may configure the detacher-side magnet part 31 with an electromagnet, and change the direction of current to switch the magnetic pole. Alternatively, the detacher-side magnet part 31 may be configured with a permanent magnet, and the detacher 30 may be provided with a mechanism for rotating the detacher-side magnet part 31. In this case, the operator can change the position of the magnetic pole by rotating the detacher-side magnet part 31.

[0069] [How to attach and detach the detector main body 20] Figure 5 is a conceptual diagram showing a method for attaching and detaching the detachable device 30 in the fire detector attaching and detaching system 200 according to the embodiment. The procedures for removing the detector main body 20 and for attaching the detector main body 20 will be described using Figure 5. Note that the description will focus on the movements of the detector-side magnet portion 22, base-side magnet portion 12, base-side engagement portion 11, and detachable-device-side magnet portion 31, and therefore illustrations of guide members and the like will be omitted. First, the procedures for removing the detector main body 20 will be described using A1 to A4.

[0070] A1 shows the state of the fire detector 100 when in use (normally), with the detector body 20 attached to the base part 10. The detector-side magnet part 22 is located below inside the detector body 20 and does not act on the base-side magnet part 12, and the base-side engaging part 11 is pressed against the detector-side engaging part 21 by the force of the spring part 14, and engages with the detector-side engaging part 21 to support the detector body 20.

[0071] A2 shows the state in which the detachable device 30 is attached to the sensor main body 20, with the detachable device-side magnet part 31 in the detachable device 30 positioned upward and close to the top surface part 30a. When the detachable device 30 is brought into contact with the sensor main body 20 with the magnetic field of the detachable device-side magnet part 31 generated on the top surface part 30a, the sensor-side magnet part 22 repels the detachable device-side magnet part 31, lifts off the bottom wall part 20a, moves upward and comes out of the sensor main body 20.

[0072] The sensor-side magnet portion 22, which has moved upward on the bottom wall portion 20a, acts on the base-side magnet portion 12, repelling the base-side magnet portion 12. Due to the repulsion of the base-side magnet portion 12 against the sensor-side magnet portion 22, the base-side engaging portion 11 moves away from the sensor-side engaging portion 21, and the engagement state with the sensor-side engaging portion 21 is released.

[0073] A3 and A4 show the state in which the detector main body 20 has been detached from the base part 10. As shown in A3, the detector side engaging part 21 and the base side engaging part 11 are disengaged from each other, and the detacher 30 is moved downward. The detector main body 20, which has been disengaged from the base part 10, is placed on the detacher 30 and moves downward together with the detacher 30 to be detached from the base part 10.

[0074] As shown in A4, when the position of the detachable-side magnet part 31 inside the detachable-side magnet part 31 is moved downwards with the sensor main body 20 detached from the base part 10, the sensor side magnet part 22 moves downwards with the sensor main body 20 and enters the sensor main body 20. When the sensor side magnet part 22 is placed on the bottom wall part 20a, the balance of the sensor main body 20 becomes stable, making it easier to move the sensor main body 20 using the detachable-side magnet part 31.

[0075] Next, the procedure for attaching the sensor main body 20 will be described using B1 to B4. Attaching the sensor main body 20 to the base part 10 is performed in the reverse order of the procedure for removing the sensor main body 20 from the base part 10. As shown in B1, the worker places the sensor main body 20 on the attachment / detachment unit 30 and brings the sensor main body 20 close to the base part 10.

[0076] As shown in B2, when attaching the detector main body 20 to the base portion 10, the worker positions the detachable-side magnet portion 31 in the detachable-side magnet portion 31 in the detector 30 upward and brings it close to the top surface portion 30a. The magnetic field of the detachable-side magnet portion 31 repels the detector-side magnet portion 22, causing the detector-side magnet portion 22 to float up from the bottom wall portion 20a and move upward.

[0077] As shown in B3, the sensor-side magnet portion 22 that has moved upward on the bottom wall portion 20a acts on the base-side magnet portion 12, repelling it. The base-side engagement portion 11 becomes separated from the sensor-side engagement portion 21 due to the repulsion of the base-side magnet portion 12 that is integrally formed with the sensor-side magnet portion 22. In this state, the worker attaches the sensor main body 20 to the base portion 10. Because the base-side engagement portion 11 becomes separated from the sensor-side engagement portion 21 due to the repulsion of the base-side magnet portion 12, the base-side engagement portion 11 is less likely to interfere with the movement of the sensor-side engagement portion 21.

[0078] In the state B3, the worker moves downward the detachable-device side magnet part 31 inside the detachable device 30. When the position of the detachable-device side magnet part 31 inside the detachable device 30 is moved downward, the sensor-side magnet part 22 moves downward in the sensor main body 20 and enters the sensor main body 20. In this state, the detachable device 30 is detached from the sensor main body 20.

[0079] As shown in B4, the sensor-side magnet portion 22 is placed on the bottom wall portion 20a of the sensor main body 20 and does not act on the base-side magnet portion 12. The base-side engaging portion 11 is pressed against the sensor-side engaging portion 21 by the force of the spring portion 14, and engages with the sensor-side engaging portion 21 to support the sensor main body 20, and the sensor main body 20 is fixed to the base portion 10.

[0080] Fig. 6 is a conceptual diagram showing an example of a fire detector attachment / detachment system 200 according to an embodiment. An example of the fire detector attachment / detachment system 200 will be described using Fig. 6. As shown in Fig. 6, at least one of the base unit 10 and the detector main body 20 has an identification mark unit 40 that displays a mark associated with the detector main body 20 and is used to verify the target detector main body 20 when inspecting or replacing the detector main body 20.

[0081] The identification marker unit 40 is an information transmission means such as an RFID (Radio Frequency Identification) tag such as an IC tag or RF tag, or a barcode including a two-dimensional code such as a QR code (registered trademark). Information associated with the sensor main body 20, such as the serial number of the sensor main body 20, a number associated with the sensor main body 20, or the manufacturing date of the sensor main body 20, is written in the identification marker unit 40. Position information is also written in the identification marker unit 40.

[0082] Of the identification marking units 40, the identification marking unit 40 attached to the base unit 10 is referred to as the base-side identification marking unit 41, and the identification marking unit 40 attached to the sensor main body 20 is referred to as the sensor-side identification marking unit 42.

[0083] The detachable device 30 has an information reading unit 32 that reads the identification mark unit 40 when verifying the sensor main body 20. The information reading unit 32 is a device that reads tag information or information such as a barcode, and may be a camera.

[0084] The fire detector attachment / detachment system 200 has an identification marker unit 40 and an information reading unit 32. In the method of attaching / detaching the detector main body 20, when the detector main body 20 is attached to the base unit 10 or when the detector main body 20 is detached from the base unit 10, the target detector main body 20 is verified based on information read from the identification marker unit 40 by the information reading unit 32. The information of the identification marker unit 40 read by the information reading unit 32 is sent to the control unit 33, where the detector main body 20 is verified. Note that the verification of the detector main body 20 may be performed automatically or may be performed according to the instructions of an operator.

[0085] The control unit 33 is configured by a dedicated control circuit, or a CPU (Central Processing Unit) that executes programs stored in memory, or a combination of these. When the control unit 33 is a CPU, each function executed by the control unit 33 is realized by software, firmware, or a combination of software and firmware. The memory provided in the control unit 33 stores tables and information associated with information from the information reading unit 32 used to verify the sensor main body 20.

[0086] Verification of the detector body 20 refers to verifying whether the detector body 20 being removed is the intended detector body 20 to be removed when removing a specific detector body 20 from multiple already installed fire detectors 100 for inspection, replacement, etc. In other words, when removing a detector body 20, verification of the detector body 20 refers to checking whether the worker has removed the wrong detector body 20. When removing a detector body 20, the information reading unit 32 reads information from either or both of the base-side identification marker unit 41 and the detector-side identification marker unit 42.

[0087] Furthermore, verifying the sensor main body 20 refers to verifying whether the sensor main body 20 is being installed on the intended base part 10 when installing a specific sensor main body 20 on a specific base part 10 out of multiple base parts 10. In other words, when installing the sensor main body 20, verifying the sensor main body 20 refers to checking whether the worker has installed the sensor main body 20 on the wrong base part 10. When installing the sensor main body 20, the information reading unit 32 reads information from both the base-side identification label part 41 and the sensor-side identification label part 42.

[0088] 6, the verification of the sensor body 20 is performed by the control unit 33 provided in the detachable unit 30, but the verification of the sensor body 20 may be performed by a device other than the control unit 33. For example, the verification of the sensor body 20 may be performed by a control unit (not shown) of the drone 60 carrying the detachable unit 30.

[0089] The fire detector attachment / detachment system 200 may also have an information processing device 70, and the detector main body 20 may be verified by the information processing device 70. The information processing device 70 may be, for example, a smart device such as a smartphone or tablet, or a personal computer. The detector main body 20 may also be verified by an external server (not shown) via a network such as the Internet.

[0090] The detachable device 30 may have a communication unit 35 for communicating with the information processing device 70 or a server. The detachable device 30 may also have a display unit 34 that displays the matching result of the sensor main body 20. The display unit 34 is, for example, an LED (Light Emitting Diode). The matching result of the sensor main body 20 may be displayed on a display unit 72 of the information processing device 70 or may be sent by email. The display unit 34 is also capable of audio output, and the matching result of the sensor main body 20 may be reported by audio output. The matching result of the sensor main body 20 may also be reported by audio output of the information processing device 70.

[0091] Furthermore, the control unit 33 may perform control to enable or disable a mechanism for attaching or detaching the sensor main body 20 based on the collation result of the sensor main body 20. For example, the control unit 33 may perform control to enable or disable a mechanism for attaching or detaching the sensor main body 20 by controlling the presence or absence or strength of the magnetic force of the detacher-side magnet unit 31 on the top surface unit 30a based on the collation result of the sensor main body 20.

[0092] More specifically, the detachable-side magnet part 31 arranged near the top surface part 30a is configured as an electromagnet, and when the control part 33 determines that the sensor main body 20 is the one that should be attached to the base part 10, the control part 33 passes a current through the detachable-side magnet part 31 to generate a magnetic field. Also, when the control part 33 determines that the sensor main body 20 is not the one that should be attached to the base part 10, the control part 33 does not pass a current through the detachable-side magnet part 31. Alternatively, when the control part 33 determines that the sensor main body 20 to be worked on is the correct sensor main body 20 for the base part 10 to be attached or detached, a mechanism for moving the detachable-side magnet part 31 in the up and down direction may be activated.

[0093] The fire detector attachment / detachment system 200 may include a drone 60. The drone 60 is an unmanned aircraft that can fly by remote control or automatic piloting. The detachment device 30 is attached to the drone 60. The control unit 33 may control the drone 60 based on the collation results of the detector main body 20. If the control unit 33 determines that the detector main body 20 to be worked on is the correct detector main body 20, the drone 60 may automatically fly toward the base unit 10, using the base unit 10 to be worked on as a marker, and attach or detach the detector main body 20.

[0094] The operation of the drone 60, the mechanism for moving the detachable magnet part 31, and the control of the current of the electromagnet to the detachable magnet part 31 may be performed remotely by an operation part 71 of the information processing device 70. If the information reading part 32 has a camera, the image acquired by the camera can be displayed on the display part 72 of the information processing device 70, thereby enabling reliable alignment of the detachable part 30 with the sensor main body 20, and alignment of the sensor main body 20 with the base part 10.

[0095] [Effects of the fire detector 100 and the fire detector attachment / detachment system 200] In the fire detector 100, the detector main body 20 and the base part 10 maintain an engaged state depending on the position of the detector-side magnet part 22 of the detector main body 20, or the engaging part operates to release the engaged state between the detector main body 20 and the base part 10. When attaching the detector main body 20 to the base part 10 or when detaching the detector main body 20 from the base part 10, the fire detector 100 does not require any force (torque) to rotate the detector main body 20 while it is installed in the base part 10. The fire detector 100 and the fire detector attachment / detachment system 200 having the fire detector 100 do not require any force (torque) to rotate the detector main body 20, and therefore the detector main body 20 can be easily attached to and detached from the base part 10.

[0096] When replacing the detector body of a fire detector installed at a high place, scaffolding must be erected, and it is not easy to erect scaffolding after equipment used in a factory or the like has been installed below the fire detector. The fire detector 100 does not require the detector body 20 to be rotated and attached to the base part 10. Therefore, even if the fire detector 100 is installed at a high place, workers can easily attach and detach the detector body 20 using a rod with a detacher 30 attached to its tip or a drone 60 with a detacher 30 attached, without erecting scaffolding.

[0097] In the fire detector 100, the engagement state between the base-side engaging portion 11 and the detector-side engaging portion 21 is maintained by the action of the spring portion 14, and the engagement state between the base-side engaging portion 11 and the detector-side engaging portion 21 is released by the action of the detector-side magnet portion 22. The fire detector 100 and the fire detector attachment / detachment system 200 having the fire detector 100 do not require force (torque) to rotate the detector main body 20 when attaching or detaching the detector main body 20, so the detector main body 20 can be easily attached to or detached from the base portion 10.

[0098] The fire detector attachment / detachment system 200 has a detacher 30 that is used when attaching or detaching the detector main body 20. The detacher 30 has a magnet that acts on the magnet in the detector main body 20 to move the position of the magnet in the detector main body 20 when attaching the detector main body 20 to the base unit 10 or when detaching the detector main body 20 from the base unit 10. The fire detector attachment / detachment system 200 can attach or detach the detector main body 20 to or from the base unit 10 by using the detacher 30 to move the magnet in the detector main body 20. The fire detector attachment / detachment system 200 does not require a force (torque) to rotate the detector main body 20 when attaching or detaching the detector main body 20, and therefore can easily attach or detach the detector main body 20 to or from the base unit 10.

[0099] The detachable device 30 has an information reading unit 32 that reads the identification mark unit 40 when verifying the detector main body 20. By having the identification mark unit 40 and the information reading unit 32, the fire detector detachable system 200 can verify the detector main body 20 that is the target of work, and can prevent the removal of a detector main body 20 that is not the target of work, and the attachment of a detector main body 20 to a base unit 10 that is not the target of work.

[0100] Conventionally, when installing, inspecting, or replacing a detector body, the detector body and base unit to be inspected have been identified using drawings. When multiple fire detectors 100 are installed, or when workers are switched between inspection and installation, there have been cases where the base unit 10 or the detector body 20 that should be inspected is mistaken. The fire detector installation and removal system 200 uses the identification label unit 40 and the information reading unit 32 to verify the base unit 10 or the detector body 20, or both, that should be inspected, thereby preventing the misidentification of the base unit 10 or the detector body 20 that should be inspected. [Explanation of symbols]

[0101] 10 base portion, 10a bottom plate, 10b base peripheral wall portion, 11 base side engagement portion, 11a tip portion, 12 base side magnet portion, 13 base side guide portion, 14 spring portion, 20 detector main body, 20a bottom wall portion, 20b main body peripheral wall portion, 21 detector side engagement portion, 22 detector side magnet portion, 23 detector side guide portion, 23a positioning member, 30 detachable device, 30a top surface portion, 31 detachable device side magnet portion, 32 information reading portion, 33 control portion, 34 display portion, 35 communication portion, 40 identification sign portion, 41 base side identification sign portion, 42 detector side identification sign portion, 50 mounting portion, 60 drone, 70 information processing device, 71 operation portion, 72 display portion, 100 fire detector, 110 engagement portion, 200 Fire detector attachment / detachment system.

Claims

1. a base portion having a magnet and attached to a mounting portion; a sensor body having a magnet that repels the magnet of the base body and that is detachably attached to the base body; Equipped with A fire detector in which the engagement between the detector body and the base is maintained when the magnet in the detector body and the magnet in the base do not face each other horizontally, and when the magnet in the detector body and the magnet in the base face each other horizontally, the engagement part between the detector body and the base operates to release the engagement between the detector body and the base.

2. The sensor body includes: a detector-side engagement portion that engages with the base portion; a magnet of the sensor body, which is inserted into and removed from the sensor body, and which acts on the magnet of the base portion when it leaves the sensor body; and The base portion is a base-side engaging portion that engages with the sensor-side engaging portion to support the sensor main body; a spring portion that biases the base-side engaging portion against the sensor-side engaging portion; a base-side magnet portion that repels the sensor-side magnet portion and moves the base-side engagement portion; and A fire detector as described in claim 1, wherein the engagement between the base side engagement portion and the detector side engagement portion is maintained by the action of the spring portion, and the engagement between the base side engagement portion and the detector side engagement portion is released by the action of the detector side magnet portion.

3. a fire detector comprising: a base portion having a magnet and attached to a mounting portion; and a detector main body having a magnet that repels the magnet in the base portion and detachably attached to the base portion, wherein at least one of the base portion and the detector main body has an identification mark portion that displays a mark associated with the detector main body; a detachable device having a detachable device side magnet that acts on the magnet of the sensor body to move the position of the magnet of the sensor body, and an information reading unit that reads the identification mark part; A method for attaching and detaching the sensor main body using A method for attaching and detaching a sensor body, which, when attaching the sensor body to the base portion or when detaching the sensor body from the base portion, verifies the target sensor body based on information read from the identification mark portion by the information reading portion, and activates the mechanism for attaching and detaching the sensor body based on the result of the verification.

Images