Fire sensor

Abstract

To provide a fire sensor in which malfunction due to a vibration can be prevented.SOLUTION: A fire sensor comprises: a base body having one of a blade metal fitting 3 and a blade-rest metal fitting 4; and a sensor body having the other of the blade metal fitting 3 and the blade-rest metal fitting 4, wherein at least a pair of blade-rest metal fittings 4 are provided. The fire sensor further comprises an anti-vibration section 6. The anti-vibration section 6 is provided on at least one side of the blade metal fitting 3 and the blade-rest metal fitting 4. The blade metal fitting 3 is sandwiched in the pair of blade-rest metal fittings 4 via the anti-vibration section 6. The blade metal fitting 3 is set up so as to be slidable even when the sensor vibrates.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a fire detector, and more particularly to a fire detector comprising a base body and a detector body. [Background technology]

[0002] Conventionally, there have been fire detectors. Fire detectors are installed to be able to detect fires by detecting flames, heat, smoke, etc. generated by a fire, and are equipped with various sensors for this purpose. Some fire detectors are installed by attaching a detector main body equipped with the sensors to a base main body attached to an installation surface such as a ceiling.

[0003] Such fire detectors obtain electricity from wiring installed in the ceiling, so the base body and the detector body must be connected to enable conductivity.The blade receiving bracket installed on the base body clamps the blade fitting installed on the detector body, thereby fixing the detector body to the base body and ensuring conductivity (see, for example, Patent Document 1).

[0004] On the other hand, in a flame detector, which is a fire detector that detects flames, a pyroelectric element is provided as a sensor, and the pyroelectric element detects infrared rays generated by the flames generated by a fire to detect the fire (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-26368 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-122473 Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional fire detectors, the clamping of the blade (300) by the blade receiving bracket (400) can be released by manually turning the detector body, but the detector body is basically fixed to the base body so that it does not move (see Figure 4). Therefore, when the building in which the fire detector is installed vibrates, the vibration is transmitted directly to the detector body via the base body attached to the ceiling. Vibrations are particularly likely to occur in factories, gymnasiums, etc. due to mechanical equipment and movement.

[0007] Conventional fire detectors have a problem in that vibrations transmitted to the detector body can cause various sensors to malfunction. In particular, the pyroelectric element installed in the flame detector generates an output when subjected to vibrations, making it prone to malfunction and potentially issuing a false fire alarm, which is a particular problem.

[0008] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a fire detector that can prevent false activation due to vibration. [Means for solving the problem]

[0009] The present invention is a fire detector comprising a base body having one of a blade fitting and a blade receiving fitting, and a detector body having the other of the blade fitting and the blade receiving fitting, wherein the blade receiving fittings are provided in at least one pair, and further comprising a vibration-isolating portion, which is provided on at least one side of the blade fitting and the blade receiving fitting, the blade fitting being clamped by the blade receiving fitting via the vibration-isolating portion, and the blade fitting being able to slide when the fire detector vibrates.

[0010] The present invention also provides a fire detector comprising a base body having one of a blade fitting and a blade receiving fitting, and a detector body having the other of the blade fitting and the blade receiving fitting, and further comprising a vibration-isolating portion, which is provided as an elastomer member provided on the contact surface between the detector body and the base body.

[0011] In the present invention, the vibration-isolating portion may be formed with a curved surface, and the cutting tool and the cutting tool holder may be in contact with each other via the curved surface. Also, in the present invention, the vibration-isolating portion may be formed into a substantially spherical shape.

[0012] Furthermore, the present invention provides that the vibration-isolating portion is a first vibration-isolating portion and further includes a second vibration-isolating portion, that at least one pair of blade holders is provided, that the second vibration-isolating portion is provided on at least one side of the blade fitting and the blade holder fitting, and that the blade fitting is clamped by the blade holder fitting via the second vibration-isolating portion, and that the blade fitting can slide when the fire detector vibrates.

[0013] In addition, although the expressions "first" and "second" are used in the present invention, these expressions are merely used to distinguish each configuration of the present invention, and the number and order thereof do not have any particular significance. [Effects of the Invention]

[0014] The present invention provides a fire detector that is provided with a vibration-isolating section, thereby preventing false activation due to vibration. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B are diagrams showing a base body according to an embodiment of the present invention, in which (a) is a bottom view and (b) is a front view. [Figure 2] FIG. 2 is a plan view of a sensor body according to an embodiment of the present invention. [Figure 3] 3 is a diagram showing a cutting tool and a cutting tool receiving tool in an embodiment of the present invention, and is a schematic diagram equivalent to the enlarged cross-sectional view of FIG. 1 taken along III-III. [Figure 4] 1 is a schematic diagram showing a blade and a blade receiving member in a conventional fire detector. DETAILED DESCRIPTION OF THE INVENTION

[0016] An embodiment of the present invention will be described with reference to Figures 1 to 3. The fire detector of this embodiment comprises a base body 1 that is attached to a ceiling, wall, or other installation surface, and a detector body 2 that is attached to the base body 1. In this embodiment, the up-down direction is defined based on the state in which the fire detector is attached to a horizontal surface, that is, the state in which the base body 1 is positioned on the upper side and the detector body 2 is positioned on the lower side.

[0017] The detector main body 2 is provided with sensors (not shown) for detecting factors for detecting the occurrence of a fire, such as smoke, heat, flames, etc. The basic structure of the detector main body 2 is similar to that of known fire detectors, and therefore a description thereof will be omitted.

[0018] The sensor main body 2 has a blade fitting 3 provided on the top surface 2a, and is rotated and attached to the base main body 1. At this time, the blade fitting 3 rotates horizontally and, as will be described later, is clamped by the blade receiving fitting 4 of the base main body 1 via the first vibration-isolating part 6. This holds the sensor main body 2 to the base main body 1 and electrically connects the sensor main body 2 to the base main body 1. In other words, the blade fitting 3, blade receiving fitting 4 and vibration-isolating part 6 are conductive and are made of a conductive material, for example, a metal material such as iron or stainless steel.

[0019] The base body 1 has at least one pair of blade receiving fittings 4 on the bottom wall 1a, and in this embodiment, it is a substantially annular body with a peripheral wall 1b erected thereon. The blade receiving fitting 4 is composed of a lower blade receiving fitting 40 and an upper blade receiving fitting 41, and in this embodiment, the lower blade receiving fitting 40 is formed on a flat plate.

[0020] In this embodiment, the upper blade receiving fitting 41 is provided as a contact spring, and is provided with a storage section for rotatably storing the first vibration-isolating part 6 (described later). The upper blade receiving fitting 41 has spring properties, which biases the blade fitting 3 in a direction perpendicular to the installation surface, thereby suppressing vibration in the vertical direction.

[0021] Between the lower blade receiving bracket 40 and the upper blade receiving bracket 41, a lead wire can be clamped, and an insertion hole 5 for this purpose is formed. This makes it possible to supply electricity to the base body 1, and ensures an electrical connection between the detector body 2 and the base body 1.

[0022] A vibration-isolating section 6 (hereinafter referred to as the first vibration-isolating section 6) is provided on at least one side of the cutting edge fitting 3 and the cutting edge receiving fitting 4. The first vibration-isolating section 6 is provided to absorb vibrations by sliding the cutting edge fitting 3 when the fire detector vibrates, thereby reducing or preventing the transmission of the vibrations to the detector main body 2.

[0023] In this embodiment, the first vibration-isolating part 6 is provided on the upper blade receiving fitting 41 side. The first vibration-isolating part 6 is provided as a rolling element and has a curved surface part 6a formed thereon, and the cutting tool 3 and the cutting tool receiving fitting 4 (the upper blade receiving fitting 41 in this embodiment) come into contact via the curved surface part 6a. Therefore, the upper blade receiving fitting 41 has a fitting part 4a as the storage part for loosely fitting the first vibration-isolating part 6 so that it can roll.

[0024] The shape of the first vibration-isolating part 6 can be selected as appropriate, for example, a roller-shaped part such as a substantially cylindrical body, or a substantially spherical shape, with a substantially spherical shape being preferred. When the first vibration-isolating part 6 is a substantially spherical part, there is no restriction on the sliding direction of the cutting fitting 3 compared to a roller-shaped part, and therefore it is possible to absorb more vibrations.

[0025] The blade fitting 3 is clamped to the blade receiving fitting 4 via the first vibration-isolating section 6, so that the blade fitting 3 slides horizontally when the fire detector vibrates. As the blade fitting 3 slides in accordance with the vibration, the vibration, particularly the horizontal vibration, is absorbed.

[0026] A vibration isolating section 7 (hereinafter referred to as the second vibration isolating section 7) is provided on the contact surface between the sensor main body 2 and the base main body 1. The second vibration isolating section 7 is made of an elastomer material, and its elasticity serves to reduce or prevent vibrations from the installation surface from being transmitted from the base main body 1 to the sensor main body 2. It is preferable that the second vibration isolating section 7 be provided over the entire surface of the contact surface, but it is also possible to provide it on only a part of the contact surface.

[0027] In this embodiment, the peripheral wall 1b is the contact surface between the detector main body 2 and the base main body 1, and the second vibration-isolating part 7 (the part shaded in light ink in Figure 1) constitutes the peripheral wall 1b of the base main body 1. Furthermore, since the cutting edge fitting 3 is clamped to the cutting edge receiving fitting 4 via the first vibration-isolating part 6, the second vibration-isolating part 7 is easier to rotate than in conventional fire detectors, and therefore the second vibration-isolating part 7 also serves to prevent the detector main body 2 from coming off the base main body 1 by its frictional force.

[0028] Therefore, in the fire detector of this embodiment, by providing the first vibration-isolating part 6 and / or the second vibration-isolating part 7, it is possible to reduce or prevent transmission of vibration from the base body 1 to the detector body 2, thereby preventing malfunction due to the vibration. This is particularly useful for fire detectors having pyroelectric elements.

[0029] Although the present invention has been described above based on the above embodiment, the present invention is not limited to the above embodiment and can be modified as appropriate within the scope of the invention.

[0030] (1) In the above embodiment, the blade receiving bracket 4 is provided on the base body 1 and the blade receiving bracket 3 is provided on the sensor body 2, but the opposite may be true, with the blade receiving bracket 3 provided on the base body 1 and the blade receiving bracket 4 provided on the sensor body 2.

[0031] (2) In the above embodiment, the first vibration-isolating portion 6 is provided on the cutting edge receiving fixture 4 side, but it can also be provided on the cutting edge fixture 3 side.

[0032] (3) In the above embodiment, both the first vibration isolating section 6 and the second vibration isolating section 7 are provided, but it is also possible to provide only one of them. [Explanation of symbols]

[0033] 1 base body 1a bottom wall 1b peripheral wall 2 Detector body 2a Top surface 3 Cutting metal fitting 300 Cutting tool 4 Cutting tool holder 4a Fitting part 40 Lower blade holder 41 Upper blade holder 400 Blade holder 5 Insertion hole 6 First vibration-isolating portion 6a Curved surface portion 7 Second seismic isolation section

Claims

1. a base body having one of a cutting tool and a cutting tool receiving tool; a sensor body having the other of the cutting tool and the cutting tool receiving tool, The blade receiving bracket is a fire detector provided in at least one pair, Further provided with a vibration isolation section, The vibration-isolating portion is provided on at least one side of the cutting tool and the cutting tool receiving tool, The cutting tool is clamped by the cutting tool holder via the vibration-isolating portion, The fire detector is characterized in that the blade metal fitting is slidable when the fire detector vibrates.

2. The vibration-isolating portion has a curved surface portion formed thereon, 2. The fire detector according to claim 1, wherein the blade metal fitting and the blade receiving metal fitting are in contact with each other via the curved surface portion.

3. 3. The fire detector according to claim 2, wherein the vibration-isolating portion is formed in a substantially spherical shape.

4. a base body having one of a cutting tool and a cutting tool receiving tool; a detector body having the other of the blade fitting and the blade receiving fitting, Further provided with a vibration isolation section, The fire detector is characterized in that the vibration-isolating portion is provided as an elastomer member provided on the contact surface between the detector body and the base body.

5. the vibration isolator is a first vibration isolator, Further provided with a second vibration isolator, At least one pair of the pin receiving fixtures is provided, the second vibration-isolating portion is provided on at least one side of the cutting tool and the cutting tool receiving tool, The cutting tool is clamped by the cutting tool receiving tool via the second vibration-isolating part, 5. The fire detector according to claim 4, wherein the blade metal member is slidable when the fire detector vibrates.

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