JP2019197346A - Fire sensor shield plate - Google Patents

Abstract

To provide a fire sensor shield plate in which a shielding surface can be provided additionally in the vicinity of a fire sensor installed on an installation surface.SOLUTION: The present invention relates to a fire sensor shield plate 12 comprising a shielding surface part 41 disposed around a fire sensor 10 that is fixed on an installation surface 100. The fire sensor shield plate 12 comprises: a base part 40 along the installation surface 100; and the shielding surface part 41 rising from the base part 40. The base part 40 includes a fixing part 42 which is fixed while being held between the fire sensor 10 and the installation surface 100. The fixing part 42 is held while being abutted to a fitting base 11 which is provided on the installation surface 100 and to which the fire sensor 100 is fixed, and the installation surface 100.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fire detector shielding plate that suppresses dust and the like from entering a fire detector fixed to an installation surface such as a ceiling surface of a building.

  The fire detector is fixed to the installation surface of the building such as the ceiling. Examples of fire detectors include fire detectors that detect smoke, fire detectors that have a heat detector that detects heat from a fire, fire detectors that detect gas, or fire detectors that combine these functions. Etc. are known.

  The fire detector is fixedly mounted on a mounting base fixed to the installation surface. The mounting base is fixed to the installation surface by screwing or the like, and an engaged metal fitting for fixing the fire detector is provided on the surface opposite to the surface contacting the installation surface. The fire sensor has an engagement fitting that engages with the engagement fitting of the mounting base on the surface on the installation surface side. As described above, as a structure in which the fire detector is fixed to the mounting base fixed to the installation surface, for example, there is a structure described in Patent Document 1.

Japanese Patent Laid-Open No. 2006-28859

  In fire detectors, it is determined that a fire has occurred when smoke or smoke generated by a fire flows into the housing of the fire detector and smoke concentration or temperature above a certain level continues for a certain period of time. . If a strong wind blows on the fire detector, the airflow flowing into the fire detector casing will blow through as it is, and the fire may not be detected with high sensitivity. For this reason, it is necessary to protect the fire detectors installed in places where strong winds blow. In addition to the need for windbreaks, it is also necessary to avoid the entry of dust and the like into the housing and the adhesion of dirt due to these. For example, a fire detector that detects smoke has a light emitting part and a light receiving part in the housing, and the light from the light emitting part is diffusely reflected by the smoke taken into the housing and diffused by the light receiving part. Smoke is detected by receiving light. If dirt adheres to the light emitting part or the light receiving part, the sensitivity of detecting smoke is lowered, and therefore the fire detector is provided with a function of detecting the dirt adhesion. The fire detector will report the occurrence of a fault if it is detected that dirt has adhered.

  Depending on where it is installed, such as in the vicinity of air conditioning equipment or outdoor corridors, the fire detector may be continuously exposed to wind from a certain direction. Not only when strong winds are blown as described above, but even with light winds, exposure to fire detectors is likely to cause dirt due to dust, etc. Become.

  When it is known in advance that the strong wind blows from a certain direction, a shielding plate can be provided in the vicinity of the fire detector when it is installed. However, it is difficult to predict in advance which of the many fire detectors installed in a building will be contaminated with light winds, and it is also difficult to predict the direction of the wind. For this reason, it is conceivable that after a certain amount of time has elapsed after the installation of the fire detector, the shielding surface is retrofitted with reference to the state of dirt adhesion.

  This invention is made | formed in view of the said subject, and it aims at providing the shielding plate for fire detectors which can provide a shielding surface in the back of the vicinity of the fire detector installed in the installation surface.

In order to solve the above-described problem, the fire detector shielding plate according to the invention of claim 1 is a fire detector shielding plate having a shielding surface portion arranged around a fire detector fixed to the installation surface,
A base along the installation surface, and the shielding surface rising from the base,
The base portion includes a fixing portion that is sandwiched and fixed between the fire detector and the installation surface.

  According to the first aspect of the present invention, since the base can be fixed between the fire detector and the installation surface, the fire detector shielding plate can be retrofitted to the fire detector already installed on the installation surface. Easy to install. By installing a shielding plate for the fire detector and making the shielding surface face the side of the fire detector, dust or the like may enter the inside of the fire detector due to the wind or adhere to the case of the fire detector. It is possible to suppress the decrease in the sensitivity of fire detection due to the influence of dust or the like. In addition, the flow rate of the wind blown to the fire detector can be reduced by the shielding surface portion, so that smoke, thermal airflow, etc. generated in the event of a fire can stay in the fire detector.

  According to a second aspect of the present invention, there is provided the fire detector shielding plate, wherein the fixing portion is sandwiched in contact with an installation base on which the fire detector is fixed and the installation surface. It is structured as a feature.

  According to the second aspect of the present invention, the fire base is shielded by temporarily removing the mounting base to which the fire detector is mounted from the installation surface and inserting the fire sensor shielding plate between the mounting base and the installation surface. The board can be fixed easily.

  Furthermore, in the fire detector shielding plate according to the invention of claim 3, the fixing portion is sandwiched in contact with an attachment base provided on the installation surface to which the fire detector is fixed and the fire detector. It is configured as a feature.

  According to the third aspect of the present invention, it is possible to attach the fire detector shielding plate by removing the fire detector from the mounting base, and to eliminate the need to remove the mounting base from the installation surface.

  Furthermore, the fire detector shielding plate according to the invention of claim 4 is characterized in that the fixing portion is sandwiched between the fire detector and the installation surface.

  According to the invention which concerns on Claim 4, even when a fire detector is directly fixed with respect to an installation surface, the shielding plate for fire detectors can be fixed by pinching | interposing between a fire detector and an installation surface.

  And the shielding plate for a fire detector according to the invention of claim 5 is such that the base is an installation surface side fixing portion fixed to the installation surface, a sensor side fixing portion for fixing the fire detector, It has the structure which has the fixing | fixed part of the wiring part connected with the said fire detector.

  According to the invention according to claim 5, since the function of the mounting base for fixing the fire detector to the installation surface is integrated with the shielding plate for the fire detector, the shielding plate for the fire detector is replaced with the mounting base. By attaching to the installation surface, the fire detector can be fixed to the installation surface while the shielding surface portion is installed to face the fire detector. Thereby, the number of parts can be reduced and the environmental load can be reduced.

  Further, in the fire detector shielding plate according to the invention of claim 6, the base portion has a through-hole portion through which a wiring portion extending from the fire detector side to the installation surface is inserted, and the through-hole portion is It has a feature that it has a notch that opens the through hole in a direction parallel to the installation surface.

  According to the invention which concerns on Claim 6, without removing the wiring part from a fire detector, the shielding board for fire detectors can be inserted along the direction parallel to an installation surface, and installation can be made easy. it can.

  In the fire detector shielding plate according to the invention of claim 7, the base portion has a through hole portion through which a wiring portion extending from the fire detector side to the installation surface is inserted, and the through hole portion is the base portion. It is characterized by being made to be continuous up to one edge.

  According to the invention of claim 7, the fire detector shielding plate can be inserted along the direction parallel to the installation surface without removing the wiring portion from the fire detector, thereby facilitating the installation. it can.

  Furthermore, in the fire detector shielding plate according to the invention of claim 8, the shield surface portion has an outer shape larger than an outer shape of an image projected on the shield surface portion when the fire detector is fixed to at least the installation surface. It is characterized by having.

  According to the eighth aspect of the present invention, since the shielding surface portion can completely hide the fire detector in the direction facing the fire detector, it is possible to effectively suppress the intrusion of dust into the fire detector. it can.

  According to the fire detector shielding plate of the present invention, the fire detector shielding plate can be easily installed later, and the shielding surface portion can be disposed in the vicinity of the fire detector. The flow rate can be reduced, and the occurrence of troubles due to contamination of the fire detector can be suppressed. In addition, by making it possible for smoke and thermal airflow generated during a fire to stay in the fire detector, the strong air prevents the airflow from blowing through the fire detector in a short time, and the fire detector reliably detects the fire. It can be carried out. Furthermore, even after installation, the orientation of the shielding surface portion can be easily changed by changing the mounting angle of the fire detection shielding plate.

It is a front view in the installation state of the shielding plate for fire detectors in this embodiment, a fire detector, and an attachment base. It is a perspective view of an attachment base. It is sectional drawing of a fire detector, Comprising: It is explanatory drawing which abbreviate | omitted internal structures other than a housing | casing, a terminal board, and an engagement metal fitting. It is a perspective view of the shielding plate for fire detectors. It is a bottom view of the shielding plate for fire detectors. It is an exploded side view at the time of attaching the shielding board for fire detectors. It is a bottom view of the shielding plate for fire detectors concerning a 1st modification. It is a bottom view of the shielding plate for fire detectors concerning a 2nd modification. It is a front view in the installation state of the shielding board for fire detectors in 2nd Embodiment, a fire detector, and an attachment base. It is a front view in the installation state of the shielding plate for fire detectors in 3rd Embodiment, and a fire detector.

  Embodiments of the present invention will be described in detail with reference to the drawings. The fire detector 10 of this embodiment is fixed to an installation surface 100 such as a ceiling of a building and detects smoke generated by a fire. FIG. 1 shows a front view of the fire detector shielding plate 12, the fire detector 10, and the mounting base 11 in the installed state in the present embodiment. As shown in this figure, the fire detector 10 of the present embodiment is fixed to the installation surface 100 via an attachment base 11, and there is a fire between the attachment base 11 and the installation surface 100. The sensor shielding plate 12 is sandwiched and fixed.

  FIG. 2 shows a perspective view of the mounting base 11. As shown in this figure, the mounting base 11 has a main body 30 having a flat and substantially cylindrical shape. A wiring hole 32 for inserting the wiring part 23 extending toward the installation surface 100 is provided on the bottom surface part 31 facing downward when the main body part 30 is attached. Further, the bottom surface portion 31 is provided with an engaged metal fitting 33 for rotationally engaging the fire detector 10 and a fixing hole portion 34 for inserting a screw for fixing the mounting base 11 to the installation surface 100. It has been. Two metal fittings 33 and two fixing holes 34 are provided in the circumferential direction of the bottom surface portion 31. The engaged metal fitting 33 is electrically connected to the wiring portion 23.

  FIG. 3 is a cross-sectional view of the fire detector 10 and shows an explanatory diagram in which the internal structure other than the housing 20, the terminal board 21, and the engagement fitting 22 is omitted. The fire detector 10 has a housing 20, and the housing 20 has a terminal board 21 as a surface facing the installation surface 100. The housing 20 has a smoke inlet 20a, and a smoke detection unit or the like is disposed inside the housing 20, but is omitted in FIG.

  The terminal board 21 is provided with an engagement fitting 22 that engages with the engagement fitting 33 of the mounting base 11. Two engagement fittings 22 are provided in the circumferential direction of the terminal board 21 corresponding to the engagement fitting 33. The fire detector 10 is electrically connected to the attachment base 11 by the engagement of the engagement fitting 22 with the engagement fitting 33 of the attachment base 11.

  The main body 30 of the mounting base 11 and the housing 20 of the fire detector 10 are formed of a resin material such as plastic. However, these may be formed of other materials.

  4 is a perspective view of the fire detector shielding plate 12, and FIG. 5 is a bottom view of the fire detector shielding plate 12. As shown in FIG. The fire detector shielding plate 12 includes a planar base 40 that extends along the installation surface 100 and a shielding surface 41 that rises from the base 40. The base portion 40 has a rectangular shape, and the shielding surface portion 41 rises from two opposing sides of the base portion 40. The shielding surface portion 41 has an outer shape that is larger than the outer shape of an image obtained by projecting the fire detector 10 onto the shielding surface portion 41 when it is fixed to at least the installation surface 100. Thereby, the shielding surface portion 41 completely hides the fire detector 10 in the facing direction, and the wind toward the fire detector 10 can be blocked by the shielding surface portion 41.

  A substantially circular through hole 43 is formed at the center of the base 40. The base 40 is formed with a notch 43 a that allows the space portion of the through hole 43 to continue to the edge of the base 40. The through hole 43 is opened toward the direction parallel to the installation surface 100 by the notch 43a.

  The top surface of the mounting base 11 can come into contact with the bottom surface side of the base 40 shown in FIG. The mounting base 11 is indicated by a one-dot chain line in FIG. The through hole portion 43 of the base portion 40 is smaller than the diameter of the mounting base 11, and the periphery of the through hole portion 43 is a fixed portion 42 that is sandwiched between the mounting base 11 and the installation surface 100.

  The wiring portion 23 extending from the fire detector 10 to the installation surface 100 can be passed through the through hole portion 43 of the base portion 40. The notch 43a of the base 40 allows the wiring part 23 to be inserted when the fire detector shielding plate 12 is moved in a direction parallel to the installation surface 100 when the fire detector shielding plate 12 is installed. it can.

  As shown in FIG. 1, the shielding surface portion 41 of the fire detector shielding plate 12 is higher than the fire detector 10 and is spaced apart from the side of the fire detector 10. By arranging the shielding surface portion 41 in this way, the airflow R toward the smoke inlet 20a of the fire detector 10 can be prevented from being directly blown against the fire detector 10. The dust contained in the airflow R can be prevented from going to the fire detector 10 by dropping downward or adhering to the shielding surface portion 41 by the shielding surface portion 41. Thereby, the adhesion of dirt due to the intrusion of airflow into the housing 20 can be reduced, and the occurrence of a failure of the fire detector 10 due to the adhesion of dirt can be suppressed. On the other hand, the air flow R can go around the shielding surface 41 and at least a part thereof can be directed toward the fire detector 10. For this reason, the airflow R containing smoke is not completely blocked when a fire occurs, and the performance of fire detection can be maintained. In order to make the shielding surface portion 41 wrap around the airflow R, the shielding surface portion 41 has an outer shape larger than the outer shape of the image projected on the shielding surface portion 41 when the fire detector 10 is fixed to the installation surface 100 as described above. It is desirable to have the smallest possible area. When the fire detector 10 is installed in a semi-outdoor area that is outside a building, such as a walkway, the wind direction is often a certain direction along the building. Since the shielding surface part 41 of this embodiment is arrange | positioned so that the fire detector 10 may be pinched | interposed, it does not disturb the airflow from directions other than the direction which a wind blows. For example, when the shielding surface portion is provided so as to surround the fire detector 10, the sensitivity to the airflow from directions other than the direction in which the wind blows is greatly reduced, but according to the shielding surface portion 41 of the present embodiment, Normal fire detection performance can be maintained.

  In addition, the shielding surface portion 41 can prevent strong wind from blowing toward the fire detector 10. When an air flow having a large flow velocity blows on the shielding surface portion 41, the flow velocity of the air flow becomes small, and the air flow can be retained at the position of the fire detector 10 for a time required for fire detection.

  In FIG. 6, the exploded side view at the time of attaching the shielding board 12 for fire detectors is shown. The fire detector shielding plate 12 is provided for the existing fire detector 10 that is continuously exposed to the airflow R from one direction. When attaching the fire detector shielding plate 12, the fire detector 10 is previously removed from the mounting base 11, and the mounting base 11 is further detached from the installation surface 100. At this time, it is not necessary to remove the wiring portion 23 extending from the fire detector 10 to the installation surface 100.

  The fire detector shielding plate 12 can be inserted between the mounting base 11 and the installation surface 100 along a direction parallel to the installation surface 100. At this time, the wiring part 23 can be arranged in the through hole part 43 through the notch part 43 a of the base part 40. By forming the notch portion 43a and the through hole portion 43 in the base portion 40, the fire detector shielding plate 12 can be attached from the side without removing the wiring portion 23. The mounting angle of the fire detector shielding plate 12 is adjusted so that the shielding surface portion 41 faces the air flow R.

  After the wiring portion 23 is placed in the through hole 43 and the mounting angle is adjusted, the mounting base 11 is fixed to the installation surface 100. As a result, the fixing portion 42 of the base 40 is sandwiched between the mounting base 11 and the installation surface 100, and the fire detector shielding plate 12 is fixed. Furthermore, the fire detector 10 can be fixed to the mounting base 11 to obtain the state shown in FIG. In addition, even after the fire detector shielding plate 12 is installed, the direction of the shielding surface portion 41 can be easily reset according to the wind direction at the installation location by the same procedure as at the time of installation. As described above, the fire sensor-needed shielding plate 12 can easily set or change the direction of the shielding surface portion 41.

  FIG. 7 shows a first modification of the fire detector shielding plate. As shown in this figure, the fire detector shielding plate 13 according to the first modification is the same as the fire detector shielding plate 12 shown in FIGS. 4 and 5 in that it includes a base 40 and a shielding surface 41. is there. In the fire detector shielding plate 13 of FIG. 7, the through-hole portion 44 has a width in diameter and is continuous to the edge of the base portion 40. Thus, if the fixing part 42 with which the mounting base 11 abuts is secured and the wiring part 23 can be inserted, the shape of the through hole part can be arbitrarily set.

  FIG. 8 shows a second modification of the fire detector shielding plate. As shown in this figure, the fire detector shielding plate 13 according to the second modification is similar to the fire detector shielding plate 12 shown in FIGS. 4 and 5 in that it includes a base 40 and a shielding surface 41. is there. The fire detector shielding plate 13 of FIG. 8 has a semicircular through hole 45, and the base 40 has a width approximately half that of the shielding surface 41. Even in this case, the base portion 40 has a fixing portion 42 with which the mounting base 11 abuts for a half circumference. Even if the base 40 has such a shape, it can be fixed by being sandwiched between the mounting base 11 and the installation surface 100, and the wiring portion 23 from the mounting base 11 can be inserted into the through hole 45. It can be inserted.

  Next, a second embodiment of the present invention will be described. In FIG. 9, the front view in the installation state of the shielding board 15 for fire detectors in 2nd Embodiment, the fire detector 10, and the attachment base 11 is shown. As shown in this figure, in the fire detector shielding plate 15 of the present embodiment, the fixing portion 42 of the base portion 40 abuts against the fire detector 10 and the mounting base 11 and is fixed therebetween. In this case, the base 40 includes a fixing portion on the mounting base side that can be locked to the engaged metal fitting 33 of the mounting base 11, and a fixing portion on the fire detector side that can be locked to the engaging metal fitting 22 of the fire detector 10. And have. As described above, the fire detector shielding plate 15 sandwiched and fixed between the fire detector 10 and the installation surface 100 may be sandwiched in contact with the fire detector 10 and the mounting base 11. . Thereby, by removing the fire detector 10 from the attachment base 11, the fire detector shielding plate 15 can be attached, and it is not necessary to remove the attachment base 11 from the installation surface 100.

  Next, a third embodiment of the present invention will be described. In FIG. 10, the front view in the installation state of the shielding plate 16 for fire detectors and the fire detector 10 in 3rd Embodiment is shown. As shown in this figure, in this embodiment, the fire detector 10 is directly fixed to the installation surface 100, and the fire detector shielding plate 16 has the fixing portion 42 of the base 40 as the fire detector 10. And the installation surface 100, and are fixed by being sandwiched. In this case, the base 40 includes a fire detector side fixing portion that can be locked to the engagement fitting 22 of the fire detector 10, and an installation surface side fixing portion that can be fixed to the installation surface 100. Yes. Thus, even when the fire detector 10 is directly fixed to the installation surface 100 without the attachment base 11, the fire detector shielding plate 16 is fixed between the fire detector 10 and the installation surface 100, The shielding surface portion 41 can be disposed on the side of the fire detector 10. Further, the fire detector shielding plate 16 may be integrated with the mounting base 11. In this case, the base 40 of the fire detector shielding plate 16 includes an installation surface side fixing portion that is fixed to the installation surface 100, a detector side fixing portion that fixes the fire detector 10, and a fire detector. 10 and a fixed portion of the wiring portion 23 that is electrically connected to the wiring 10. Thereby, it replaces with the attachment base 11, and the fire detector 10 can be fixed to the installation surface 100, installing the shielding surface part 41 by attaching the shielding plate 16 for fire detectors to the installation surface 100.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical idea. The fire detector 10 in the above-described embodiment detects smoke, but other than this, such as a fire detector that detects heat, a fire detector that detects gas, or a fire detector that combines these, or the like. The fire detector shielding plate 12 can also be attached to the type of fire detector. Moreover, although the above-mentioned fire detector detects the occurrence of a fire, the fire detector shielding plate 12 can be attached to an alarm device having a notification unit that generates sound and light when a fire occurs.

DESCRIPTION OF SYMBOLS 10 Fire detector 11 Mounting base 12 Fire detector shielding plate 20 Case 20a Smoke inlet 21 Terminal board 22 Engagement metal fitting 23 Wiring part 30 Main body part 31 Bottom face part 32 Hole part for wiring 33 Engagement metal fitting 34 Fixing hole Part 40 Base part 41 Shielding surface part 42 Fixing part 43 Through hole part 43a Notch part 44 Through hole part 100 Installation surface 101 Insertion hole part

Claims (8)

A fire detector shielding plate having a shielding surface portion arranged around a fire detector fixed to an installation surface,
A base along the installation surface, and the shielding surface rising from the base,
The fire detector shielding plate according to claim 1, wherein the base portion includes a fixing portion that is sandwiched and fixed between the fire detector and the installation surface.   2. The fire detector shielding plate according to claim 1, wherein the fixing portion is provided on the installation surface and sandwiched between an installation base on which the fire detector is fixed and the installation surface.   2. The fire detector shielding plate according to claim 1, wherein the fixing portion is provided on the installation surface and sandwiched between an attachment base on which the fire detector is fixed and the fire detector.   The fire detector shielding plate according to claim 1, wherein the fixing portion is sandwiched between the fire detector and the installation surface.   The base includes an installation surface side fixing portion that is fixed to the installation surface, a sensor side fixing portion that fixes the fire detector, and a wiring portion fixing portion that is connected to the fire detector. The fire detector shielding plate according to claim 4.   The base portion has a through hole portion through which a wiring portion extending from the fire detector side to the installation surface is inserted, and the through hole portion opens the through hole portion in a direction parallel to the installation surface. The fire detector shielding plate according to any one of claims 1 to 5, further comprising a notch portion.   The base portion has a through hole portion through which a wiring portion extending from the fire detector side to the installation surface is inserted, and the through hole portion is continuous to one edge of the base portion. Item 6. The fire detector shielding plate according to any one of Items 1 to 5.   The said shielding surface part has an outer shape larger than the outer shape of the image which projected the said fire detector on the said shielding surface part when fixed to the said installation surface at least. A shield for fire detectors as described in 1.

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