JP5828436B1 - Fire detector protective cover - Google Patents

Abstract

Provided is a protective cover that has a simple configuration but is versatile enough to be mounted on various fire detectors, is reusable, and can be attached and detached with one hand. A protective cover (10) covers a fire sensor (2) projecting from a ceiling and is detachable repeatedly, and includes a cup (11) and an elastic member (12). The cup 11 has a larger storage volume than the opening 21 facing the ceiling and the outer shape of the fire detector 2. The elastic member 12 is fixed to the inner periphery 21 </ b> A of the opening 21, has a flexibility to flatten according to the shape of the outer periphery 2 </ b> A of the fire detector 2, and frictionally engages with the fire detector 2. [Selection] Figure 2

Description

  The present invention relates to a protective cover that covers a fire detector during a building interior work or a renovation work.

  When performing gas cutting, welding, or grinder work for interior work or refurbishment work near a fire detector installed on the ceiling, a large amount of dust is generated with the work. If dust, fume, or combustion gas enters the fire detector, it may cause a malfunction such as a malfunction of the fire detector or a decrease in the detection sensitivity of the fire detector. Therefore, a protective cover that temporarily covers the fire detector when performing the above-described work has been proposed (for example, Patent Documents 1 to 4).

  The fire alarm sensor cover disclosed in Patent Document 1 has a synthetic resin or metal locking piece attached to the mouth of a cup-shaped cover, and the tip of the locking piece is connected to the casing of the fire alarm sensor and the ceiling surface. The cover is engaged with the fire alarm detector.

  In the sensor cover disclosed in Patent Document 2, an outer cylinder portion is loosely fitted to the sensor, and air bags are provided on the inner side surface and the inner bottom surface of the outer cylinder portion. The sensor cover is held by the sensor with the pressure of air sealed inside the air bag. To remove the sensor cover, make a hole in the air bag, let the air flow out, and drop it by its own weight.

  The smoke detector protective cover disclosed in Patent Document 3 is made from a sheet-like or film-like cover by vacuum molding according to the outer shape of the smoke detector housing, and the protective cover is attached to the outer peripheral surface of the smoke detector. It is attached so that it is in close contact. The dustproof cover disclosed in Patent Document 4 is attached by locking the upper edge of the dustproof cover to the upper edge of the sensor body.

Japanese Utility Model Publication No. 3-78393 JP-A-9-147259 Japanese Utility Model Publication No. 52-32377 Japanese Utility Model Publication No. 52-86488

By the way, fire detectors are installed in high places such as the ceiling. Therefore, when curing the fire detector or attaching a protective cover, a stepladder or the like is required. If the ceiling is high, it is dangerous to do both-hands work on the stepladder, so safety measures are essential. In addition, too much construction time and cost to make the set a dedicated scaffold.

  Considering the above, in the dustproof cover described in Patent Document 1, it is necessary to work with both hands in order to insert the locking piece between the casing of the fire alarm sensor and the ceiling surface. If there is no gap between the casing of the fire alarm sensor and the ceiling surface, the locking piece cannot be inserted.

  The sensor cover described in Patent Document 2 has a large number of parts, a complicated structure, and a high cost. In addition, since the air bag is pierced for removal from the sensor, it cannot be reused. Since the protective covers described in Patent Document 3 and Patent Document 4 are both made as a part of a factory-shipped packaging container, they are formed in substantially the same shape so as to be in close contact with the fire detector. Therefore, these covers cannot be used for fire detectors of different shapes or existing fire detectors. Also, since there is almost no gap between the protective cover and the fire detector, it is easily affected by heat, and when spatter from welding or gas cutting scatters or when a tool or building material is applied. The protective covers of Literature 3 and Patent Literature 4 cannot protect the fire detector.

  As described above, although the dustproof cover described in Patent Document 1 can be used by being mounted on various existing fire detectors, safety measures are required for work at high places. On the other hand, the protective cover described in Patent Document 2 to Patent Document 4 is a dedicated component that is attached to the fire detector as a packaging material shipped from the factory. It cannot be diverted to fire detectors with different shapes at each manufacturer.

  Accordingly, the present invention provides a protective cover that is versatile and can be attached to various fire detectors with a simple configuration, is reusable, and can be attached and detached with one hand.

The protective cover of the present invention is a protective cover that covers and detaches the fire detector projecting from the ceiling, and includes a cup and foamed plastic . Cup has a greater storage volume than the outer shape of the opening及beauty fire detector facing the ceiling, on the storage volume, at least larger gap than the fire detector below the fire detector you included. The foamed plastic is fixed to the inner periphery of the opening, has a flexibility of flattening according to the outer peripheral shape of the fire detector, and frictionally engages with the fire detector.

At this time, the foamed plastic may seal between the opening and the outer periphery of the fire detector. The foamed plastic has an inner peripheral surface formed in a wave shape when not mounted on the fire sensor, and seals between the opening and the outer periphery of the fire sensor when mounted on the fire sensor. The inner peripheral surface is deformed. Or you may have a rectangular inner peripheral surface in order to seal between an opening part and the outer periphery of a square pillar-shaped fire detector. A protective cover according to another embodiment of the present invention is a protective cover that covers and detaches a fire sensor projecting from a ceiling, and that is repeatedly removable, and includes a cup, a foamed plastic, a light source, and a control unit. And a power source. The cup has a larger storage volume than the opening facing the ceiling and the outer shape of the fire detector. The foamed plastic is fixed to the inner periphery of the opening, has a flexibility of flattening according to the outer peripheral shape of the fire detector, and frictionally engages with the fire detector. The light source is attached to the bottom of the cup and emits light toward the outside of the cup. The control unit controls the light emission pattern of the light source. The power source is connected to the light source and the control unit. At this time, the control unit may blink the light source in conjunction with the optical sensor.

  According to the protective cover of the present invention, the fire detector can be covered with a simple configuration of the cup and the elastic member. Since the elastic member can be deformed corresponding to the outer shape of various fire detectors, it has versatility that can be attached to various fire detectors. Further, the elastic member is fixed to the opening of the cup, and can be easily attached to the fire detector simply by pushing it up toward the ceiling while turning the cup. Since the means for holding the protective cover is based on the frictional engagement of the elastic member, it can be easily removed simply by pulling with a force exceeding the frictional force. Moreover, since the shape of the elastic member is restored by the elastic force, it can be used repeatedly. Also, the cup is larger than the fire detector and a sufficient gap is secured between them. Therefore, even if welding or gas cutting spatter hits the cup, the outer periphery of the fire detector can be protected from damage.

  Further, if the elastic member seals between the opening and the outer periphery of the fire detector, it is possible to more reliably prevent dust from entering the fire detector. If the elastic member is a foamed plastic, the protective cover can be provided with an inexpensive configuration. Moreover, according to the protective cover further provided with the string hanging from the cup, the protective cover can be removed more easily by pulling the string. And since a string attracts attention, it can prevent forgetting to remove a protective cover after construction. Alternatively, according to the protective cover that further includes a light source that emits light toward the outside of the cup, the light source is eye-catching, so that it is possible to prevent the protective cover from being forgotten to be removed after construction. In addition, if the cup is formed of a phosphorescent material or a fluorescent material, the colored cup is eye-catching, so that it is possible to prevent forgetting to remove the protective cover after the construction.

The perspective view which shows the protective cover of 1st Embodiment which concerns on this invention. Sectional drawing which mounted | wore the fire detector with the protective cover shown by FIG. The protection cover shown by FIG. 1 is shown, (A) is sectional drawing of a protection cover, (B) is sectional drawing which attached the said protection cover to the fire detector. The figure which shows the attachment operation | work of the protective cover shown by FIG. The protection cover of 2nd Embodiment which concerns on this invention is shown, (A) is sectional drawing of a protection cover, (B) is sectional drawing which attached the said protection cover to the fire detector. The protection cover of 3rd Embodiment which concerns on this invention is shown, (A) is sectional drawing of a protection cover, (B) is sectional drawing which attached the said protection cover to the fire detector. The front view which shows the protective cover of 4th Embodiment which concerns on this invention. The perspective view which shows the protective cover of 5th Embodiment which concerns on this invention.

  A protective cover 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. The fire detector 2 is installed so as to protrude from the ceiling 1 as shown in FIG. The protective cover 10 is attached from below so as to cover the fire detector 2. The inner diameter R1 of the elastic member 12 is smaller than the outer diameter R2 of the fire detector 2, and the elastic member 12 is expanded by the fire detector 2 and deformed.

  The protective cover 10 attached to the fire detector is shown in FIG. The protective cover 10 includes a cup 11 and an elastic member 12. The cup 11 is formed of a hard plastic, and has a cylindrical body portion 22, an opening portion 21 formed at one end of the body portion 22 and facing the ceiling 1, and a bottom portion 23 formed at the other end of the body portion 22. have. The cup 11 is formed larger than the fire detector 2. The elastic member 12 is fixed to the inner periphery 21 </ b> A of the opening 21.

  The elastic member 12 is formed from a lightweight elastic material such as foamed plastic, and is formed in an annular shape having a rectangular shape in cross section. Examples of the foamed plastic include polyurethane foam, polyolefin foam, and melamine foam. The material of the elastic member is not limited to these, and any other material may be used as long as it is restored to the shape before being attached to the fire detector 2 when it is detached from the fire detector 2.

  FIG. 3 shows a state where the protective cover 10 is not attached to the fire detector 2, and FIG. 3B shows a state where the protective cover 10 is attached to the fire detector 2. When not mounted on the fire detector 2, the inner diameter R1 of the elastic member 12 is smaller than the diameter R2 of the circumscribed circle of the outer periphery 2A of the fire detector 2. The outer diameter R3 of the elastic member 12 is formed substantially the same as the inner diameter R4 of the opening 21 of the cup 11.

  In the protective cover 10 configured as described above, the attaching and detaching procedures will be described with reference to FIGS. To attach the protective cover 10 to the fire detector 2, as shown in FIG. 4, the cup 11 is held with one hand with the opening 21 facing the ceiling. The elastic member 12 is brought into contact with the fire detector 2 and pushed up toward the ceiling 1 while rotating the cup 11. Then, as shown in FIG. 2, the elastic member 12 is deformed in a flat shape following the shape of the outer periphery 2 </ b> A of the fire detector 2. The deformed elastic member 12 presses the outer periphery 2A in an attempt to restore. As a result, a frictional force is generated between the two, and the protective cover 10 is held by the fire detector 2.

  At this time, the elastic member 12 seals between the inner periphery 21 </ b> A of the opening 21 and the outer periphery 2 </ b> A of the fire detector 2. In the present specification, “the elastic member 12 seals between the opening 21 and the outer periphery 2 </ b> A of the fire detector 2” does not mean that the elastic member 12 is airtight or watertight. The inner periphery 12 </ b> A of the elastic member 12 may be in contact with the outer periphery 2 </ b> A of the fire detector 2 without interruption. Therefore, the elastic member 12 includes a material having a slight air permeability.

  In order to remove the protective cover 10 from the fire detector 2, the cup 11 is gripped and pulled downward with a force exceeding the frictional force between the inner periphery 12 </ b> A of the elastic member 12 and the outer periphery A of the fire detector 2.

  In the protective cover 10 configured as described above, the fire detector 2 can be covered with a simple configuration of the cup 11 and the elastic member 12. In addition, the elastic member 12 can be deformed corresponding to the outer shape of various fire detectors 2. Therefore, the protective cover 10 also has versatility that can be attached to the fire detector 2 such as a cylinder or a prism.

  Furthermore, the elastic member 12 is fixed to the opening 21 of the cup 11 and can be easily attached to the fire detector 2 simply by pushing up the cup 11 toward the ceiling 1 while turning. The means for holding the protective cover 10 is based on the frictional engagement of the elastic member 12. Therefore, it can also be easily removed simply by pulling with a force exceeding the frictional force.

  Moreover, since the shape of the elastic member 12 is restored by the elastic force, the protective cover 10 can be used repeatedly without being disposable. In addition, the cup 11 is larger than the fire detector 2, and a sufficient gap is secured between the cup 11 and the fire detector 2. Therefore, the outer periphery 2 of the fire detector 2 can be protected from damage even when welding or gas cutting spatter hits the cup 11.

  Moreover, since the elastic member 12 has sealed between the opening part 21 and the outer periphery 2A of the fire detector 2, it can prevent more reliably that the dust at the time of construction penetrate | invades into the fire detector 2. FIG. . Moreover, the elastic member 12 is made of foamed plastic, and the protective cover 10 having the above-described excellent effects can be provided with an inexpensive configuration.

  Next, the protective cover 10 of the second to fifth embodiments will be described. The configuration having the same or similar function as the configuration of the first embodiment is denoted by the same reference numeral, and the description of the corresponding first embodiment is referred to, and the description thereof is omitted here. The configuration other than that described below is the same as that of the first embodiment.

  A protective cover 10 according to a second embodiment of the present invention will be described with reference to FIG. 5A shows a state where the protective cover 10 is not attached to the fire detector 2, and FIG. 5B shows a state where the protective cover 10 is attached to the fire detector 2. FIG. The protective cover 10 of the second embodiment is different from the first embodiment in that the inner periphery 12A of the elastic member 12 is formed in a wave shape. The inscribed circle of the inner circumference 12A is smaller than the circumscribed circle R2 of the outer circumference 2A of the fire detector 2. In this embodiment, the repulsive force can be finely adjusted according to the material of the elastic member 12.

  A protective cover 10 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a state where the protective cover 10 is not attached to the fire detector 2, and FIG. 6B shows a state where the protective cover 10 is attached to the fire detector 2. The protective cover 10 of the third embodiment is different from the first embodiment in that the inner periphery 12A of the elastic member 12 is formed in a straight line and constitutes an opening having a rectangular shape in plan view. The inscribed circle R6 of the inner circumference 12A is smaller than the circumscribed circle R2 of the outer circumference 2A of the fire detector 2. This embodiment is suitable for the square pillar-shaped fire detector 2 and can be attached so as to seal between the opening 21 and the outer periphery 2 </ b> A of the fire detector 2. It can also be attached to the columnar fire detector 2.

  A protective cover 10 according to a fourth embodiment of the present invention will be described with reference to FIG. The protective cover 10 of the fourth embodiment is different from the first embodiment in that it further includes a light source that is attached to the bottom 23 of the cup 11 and emits light toward the outside of the cup 11. The light source is, for example, an LED element 16 </ b> A included in the LED package 16. The LED package 16 includes a power source 16B and a control unit 16C in addition to the LED element 16A. The controller 16C controls the light emission pattern, for example, blinks the LED element 16A in conjunction with the light sensor. In this embodiment, the LED element 16 </ b> A that emits light toward the outside of the cup 11 draws attention and calls attention. Therefore, it can prevent forgetting to remove the protective cover 10 after construction.

  A protective cover 10 according to a fifth embodiment of the present invention will be described with reference to FIG. The protective cover 10 of the fifth embodiment is further different from the first embodiment in that it further includes a string 18 hanging from the cup 11 and the cup 11 is formed of a phosphorescent material or a fluorescent material. In the present specification, the “phosphorescent material” only needs to contain at least a phosphorescent pigment. The “fluorescent material” is sufficient if at least the material contains a fluorescent pigment. In this embodiment, the protective cover 10 can be removed more easily by pulling the string 18. Moreover, since the string 18 is eye-catching, it can be prevented that the protective cover 10 is forgotten to be removed after the construction. Moreover, since the cup 11 is formed from a phosphorescent material or a fluorescent material and the colored cup 11 is eye-catching, it can be prevented that the protective cover 10 is forgotten to be removed after the construction.

The protective cover of the present invention is not limited to the above-described embodiment. The shape of the cup may be a rectangular tube shape, a truncated cone shape, a truncated pyramid shape, or a hemispherical shape. A seal printed with a phosphorescent pigment or fluorescent pigment may be attached to the cup. A string may be formed from a phosphorescent material or a fluorescent material. A tag that serves as a mark may be hung from the bottom end of the string. The light source may be hung from the hanging end of the string.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A protective cover that covers the fire detector projecting from the ceiling and that can be repeatedly attached and detached, and has an opening facing the ceiling and a storage volume larger than the outer shape of the fire detector; A protective cover, comprising: an elastic member fixed to the inner periphery of the opening, having a flexibility of flattening according to the outer peripheral shape of the fire detector, and frictionally engaging with the fire detector.
[2] The protective cover according to [1], wherein the elastic member seals between the opening and the outer periphery of the fire detector.
[3] The protective cover according to [1] or [2], wherein the elastic member is a foamed plastic.
[4] The protective cover according to any one of [1] to [3], further comprising a string hanging from the cup.
[5] The protective cover according to any one of [1] to [4], further including a light source that emits light toward the outside of the cup.
[6] The protective cover according to any one of [1] to [5], wherein the cup is formed of a phosphorescent material or a fluorescent material.

  DESCRIPTION OF SYMBOLS 1 ... Ceiling, 2 ... Fire detector, 2A ... Outer periphery, 10 ... Protective cover, 11 ... Cup, 12 ... Elastic member, 16A ... Light source, 18 ... String, 21 ... Opening, 21A ... Inner circumference.

Claims (6)

It is a protective cover that covers the fire detector projecting from the ceiling and can be removed repeatedly.
A cup having an opening facing the ceiling and a storage volume larger than the outer shape of the fire sensor, and including at least a gap larger than the fire sensor below the fire sensor in the storage volume ;
A protective cover, comprising: a foamed plastic that is fixed to an inner periphery of the opening, has a flexibility of being flattened according to an outer peripheral shape of the fire detector, and is in frictional engagement with the fire detector. The protective cover according to claim 1, wherein the foamed plastic seals between the opening and an outer periphery of the fire detector. The foamed plastic has an inner circumferential surface formed in a wave shape when not mounted on the fire sensor, and the opening and the outer periphery of the fire sensor are mounted on the fire sensor. The protective cover according to claim 1 or 2, wherein the inner peripheral surface is deformed so as to seal a gap therebetween. 3. The protective cover according to claim 1, wherein the foamed plastic has a rectangular inner peripheral surface that seals between the opening and an outer periphery of a square pillar-shaped fire detector. It is a protective cover that covers the fire detector projecting from the ceiling and can be removed repeatedly.
A cup having a larger storage volume than the opening facing the ceiling and the outer shape of the fire detector;
A foamed plastic that is fixed to the inner periphery of the opening, has a flexibility to follow the outer shape of the fire sensor, and is frictionally engaged with the fire sensor;
A light source attached to the bottom of the cup and emitting light toward the outside of the cup ;
A control unit for controlling a light emission pattern of the light source;
A power source connected to the light source and the control unit;
Protection cover you, characterized in that to obtain Bei the. The protective cover according to claim 5, wherein the control unit blinks the light source in conjunction with an optical sensor.

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