JP2006065441A - Method for confirming monitoring range of fire sensor and device for use therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To visually confirm the monitoring range of a fire sensor and its center at the same time without stopping a device in each case or requiring any difficult operation. <P>SOLUTION: A light source 15 that emits light in a direction perpendicular to the front of the fire sensor is secured in a body case that is externally fitted with either the fire sensor or the mounting base thereof. A spectral diffraction means 28 that is tilted by a predetermined angle to match the monitoring range of the fire sensor is positioned in front of the light source 15 along the direction in which the light is emitted. The spectral diffraction means 28 is rotated so that the light from the light source 15 is diffracted into light that is transmitted therethrough to illuminate the center of the monitoring range and light that is reflected thereby to illuminate the monitoring range. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for checking a monitoring range of a flame detector and a device used therefor.

Japanese Patent Laid-Open No. 2002-83379 Japanese Patent Laid-Open No. 2001-264160

  As a method and apparatus for confirming the monitoring range and the center of a flame detector attached to a ceiling or a wall surface with light, there is one described in Patent Document 1. Moreover, there exists a thing of patent document 2 as an apparatus which confirms the center of the monitoring range of a flame detector by light. Since these devices can visually grasp the monitoring range of the flame detector or its center, the confirmation work will progress, and the burden on the operator when working upside down as before will be reduced. There is an advantage that can be.

  By the way, the flame detector usually has the highest detection sensitivity at the center of the monitoring range, and when the flame detector is installed, adjustment is performed so that the monitoring object is positioned at the center of the monitoring range. Therefore, it is important to check the center of the monitoring range of the flame detector.

  According to the method and apparatus described in Patent Literature 1, the center of the monitoring range can be confirmed together with the confirmation of the monitoring range of the flame detector. That is, in the method and apparatus described in Patent Document 1, the center of the monitoring range of the sensor can be confirmed by changing the angle of the light source (laser pointer). There is a problem that it is troublesome to stop the rotation of the laser pointer) and change its angle.

  Moreover, the apparatus described in Patent Document 2 confirms the center of the monitoring range of the flame detector, and thus cannot directly confirm the monitoring range. In addition, the adjustment of the irradiation angle of the laser pointer is performed by pushing and pulling the position of the laser pointer in the cylinder with a plurality of screws.

  The present invention has been made in view of the above points, and is a flame detector that can visually check the monitoring range and its center at the same time without stopping the apparatus or requiring difficult operations. A monitoring range confirmation method and a device used in the method are provided.

  Therefore, the gist of the present invention is that a light source that irradiates light in a direction perpendicular to the front surface of the flame detector at a mounting position of the flame detector, and a light source disposed in front of the light irradiation direction of the light source. And using the spectroscopic means inclined at a predetermined angle according to the monitoring range of the flame detector to be used, rotating the spectroscopic means, and transmitting the light emitted from the light source to irradiate the center of the monitoring range The monitoring range of the flame detector is characterized in that light and light are reflected to irradiate the monitoring range, and the monitoring range and its center are simultaneously confirmed by the light emitted from the light source. There is a confirmation method.

  In the above method, it is desirable to use a laser unit such as a semiconductor laser as the light source. A laser pointer may be used. Further, it is desirable to use a half mirror as the spectroscopic means.

  The apparatus used in the above method includes a main body case fitted on the flame detector or its mounting base, a motor fixed in the main body case, and a direction perpendicular to the front surface of the flame detector in the main body case. A light source attached so as to irradiate light, a rotating support that is mounted in the main body case so as to rotate in parallel with the front surface of the flame detector, and that rotates using the motor as a driving source, and the rotation support A spectroscopic means is attached to the top of the body, and the spectroscopic means is held at a predetermined angle in accordance with the monitoring range of the flame detector in front of the light irradiation direction, and held by the spectroscopic means holder. The light source is configured to include a light splitting device that splits the light from the light source to be transmitted and irradiate the center of the monitoring range and the light to be reflected and irradiated to the monitoring range.

  In the above apparatus, the spectroscopic means may be adjustable in elevation angle. In this case, it is possible to perform confirmation work when the monitoring range varies depending on the height and irradiation angle of the flame detectors installed alone, and confirmation work corresponding to several types of flame detectors with different monitoring ranges.

  In the above apparatus, it is desirable to use a laser unit as the light source, and it is desirable to use a half mirror as the spectroscopic means.

  According to the method of the present invention according to claim 1, the monitoring range and the center of the flame detector can be visually confirmed at the same time without stopping the apparatus or requiring difficult operations.

  Moreover, according to the confirmation apparatus which concerns on Claim 4, the invention method which concerns on Claim 1 can be implemented efficiently. And when it becomes possible to adjust the elevation angle of the spectroscopic means in the apparatus, the confirmation work when the monitoring range varies depending on the height and irradiation angle of the flame detector to be installed alone, and several types of monitoring ranges differing The confirmation work corresponding to the flame detector can be performed. Further, when a laser unit is used as the light source, the light can be sufficiently received even when the distance from the ceiling to the floor is long, and the cost can be reduced because the acquisition price is low.

  In the best mode for carrying out the present invention, a laser unit that irradiates light in a direction perpendicular to the front surface of the flame detector is fixed in a body case that is externally fitted to the flame detector or its mounting base, A half mirror inclined at a predetermined angle according to the irradiation range of the flame detector is arranged in front of the light irradiation direction of the laser unit, and the half mirror is rotated. Then, the light from the laser unit is transmitted through the half mirror and is split into light that irradiates the center of the monitoring range and light that is reflected and irradiates the monitoring range. This is because it is now possible to visually confirm the above.

Examples of the present invention will be described below.
FIG. 1 is an explanatory diagram of a method for confirming the monitoring range of a flame detector, and FIG. 2 is an explanatory diagram of the principle.

  In the figure, 1 is a building, 1a is a ceiling, 1b is a side wall, and 1c is a floor. 2, 3, and 4 are flame detectors attached to the ceiling 1a. Of these flame detectors, one flame detector 2 is slightly inclined since it is close to the side wall 1b.

  Reference numerals 5, 6, and 7 are confirmation devices for a monitoring range described later, and a main body case is externally fitted to each flame detector 2, 3, and 4 and attached thereto. Further, as will be described in detail later, the confirmation devices 5, 6, and 7 are disposed and used in a light source that irradiates light in a direction perpendicular to the front surface of the flame detector and in front of the light irradiation direction of the light source. And a spectroscopic means inclined at a predetermined angle in accordance with the monitoring range of the flame detector. A laser unit is used as the light source, and a half mirror is used as the spectroscopic means. And while irradiating light from the laser unit which is a light source, the half mirror which is a spectroscopic means is rotated in parallel with the front of a flame detector.

  FIG. 2 shows this state. A part of the light emitted from the laser unit is transmitted through the half mirror to irradiate the center of the monitoring range, and the other is reflected according to the inclination angle. To illuminate the monitoring area. The light reflected by the half mirror irradiates the floor 1c or the side wall 1b so as to draw a circle, and the locus of the irradiation point at this time coincides with the monitoring range of each flame detector. Thus, by visually observing the irradiation point on the floor surface 1c or the side wall 1b, the monitoring range and the center of each flame detector can be confirmed at the same time. Reference numerals 5a, 6a, and 7a indicate the monitoring ranges of the flame detectors 2, 3, and 4, and 5b, 6b, and 7b indicate the centers of the respective monitoring ranges.

Next, an apparatus used in the above method shown in FIGS. 3 to 6 will be described.
3 is a perspective view as seen from the lower side, FIG. 4 is a perspective view as seen from the upper side, FIG. 5 is a perspective view of the light source and the spectroscopic means in a state removed from the main body case, and FIG. It is the perspective view of the light source and the spectroscopic means part in the state removed from the main body case.

  Reference numeral 8 denotes a main body case which is externally fitted to the flame detector or its mounting base. Further, the main body case 8 has a rectangular box shape in this embodiment, and the internal area into which the flame detector is fitted is adapted to the flame detector to which it is attached. In addition, a circular window hole 9 through which a spectroscopic means holding body and spectroscopic means project is provided at the lower center. Furthermore, a cylindrical cover 10 is provided so as to surround the window hole 9.

  Reference numeral 11 denotes a support plate screwed into the main body case 8, and 12 denotes a base plate fixed on the support plate 11 with a support plate to be described later. Reference numeral 13 denotes a motor fixed in the main body case 8 and serves as a rotational drive source of the rotary support described later. The motor 13 is powered by a battery (not shown) housed in a battery box (not shown) provided in the main body case 8, and 14 is a switch for operating the motor 13. . Although not shown, a means for controlling the rotation and stop of the motor 13 and the rotation speed may be provided, and this may be operated remotely.

  A light source 15 is mounted in the main body case 1 so as to irradiate light in a direction perpendicular to the front surface of the flame detector. In this embodiment, a laser unit that irradiates linear light is used. . The light source 15 is fixed to the base plate 12 so that the center thereof coincides with the center of the light receiving part of the flame detector.

  Reference numeral 16 denotes a cylindrical rotary support that is mounted in the main body case 8 so as to rotate in parallel with the front surface of the flame detector and is rotated by using the motor 13 as a drive source. The rotary support 16 is rotatably mounted with a bearing 17 provided so as to surround the light source 15 on the upper surface of the base plate 12.

  Further, a large gear 18 is fixed to the rotary support 16, and the large gear 18 is meshed with a gear 21 fixed to the rotary shaft 13 a of the motor 13 via intermediate gears 19 and 20.

  Reference numeral 22 denotes a support plate composed of a vertical portion 22a and a horizontal portion 22b fixed on the support plate 11 with screws 22A, and supports the base plate 12, the motor 13, and the rotary shaft 23 of the gears 19 and 20. To do. Further, the horizontal portion 22b of the support plate 22 is provided with a notch portion 22B from which the spectroscopic means holder and the spectroscopic means, which will be described later, protrude.

  A spectroscopic means holder 24 is attached to the top of the rotary support 16. The spectroscopic means holding body 24 includes a pair of opposing support plates 24a and 24a, and support plates 24b and 24b attached to the support plates 24a and 24a so that the elevation angle can be adjusted inside the support plates 24a and 24a. Is. Further, an arrow mark 26 is displayed on the end face of the support shaft 25 to indicate the inclination angle of the spectroscopic means, and an angle scale 27 is displayed on the support plates 24a and 24a.

  A spectroscopic unit 28 is held by the spectroscopic unit holder 24. In this embodiment, a half mirror is used. The spectroscopic means 28 is inclined at a predetermined angle in front of the light irradiation direction of the light source 15 according to the monitoring range of the flame detector. The spectroscopic means 28 splits the light from the light source 15 into light that is transmitted to irradiate the center of the monitoring range and light that is reflected to irradiate the monitoring range.

Next, the operation of this apparatus will be described.
First, the main body case 8 is fitted on the flame detector or its mounting base. Then, the light source 15 and the motor 13 are switched on to be in an operating state. As a result, the spectroscopic means 28 rotates at an inclination angle in accordance with the monitoring range of the flame detector. A part of the light from the light source 15 passes through the spectroscopic means 28 and irradiates the center of the monitoring range, and the light reflected by the spectroscopic means 28 irradiates the floor or side wall so as to draw a circle. To do. Since the locus of the irradiation point at this time coincides with the monitoring range of the flame detector, the monitoring range can be confirmed by visual observation. Therefore, the monitoring range of the flame detector and its center can be visually confirmed simultaneously.

  Further, since the support plate 22 for supporting the base plate 12, the motor 13 and the like is fixed on the support plate 11 with screws 22A, the main body case 8 tries to fit it, that is, confirm it. If the outer diameter of the flame detector is not suitable, remove the support plate 22 from the support plate 11 and set it again on the support plate in the main body case of a size suitable for the flame detector to be confirmed. Thus, the main body case can be replaced with a suitable one.

  The present invention is a method and apparatus for confirming the monitoring range of a flame detector, but can be used for a method and apparatus for confirming the monitoring range of various infrared detectors such as a flame detector that detects a flame and notifies a fire. The present invention can be applied as appropriate without departing from the scope of the present invention.

It is explanatory drawing of the confirmation method of the monitoring range of the flame detector which concerns on this invention. It is a principle explanatory view of the present invention. It is the perspective view seen from the lower part side of the confirmation apparatus of the monitoring range of the flame detector which concerns on this invention. It is the perspective view seen from the upper part side of the apparatus shown in FIG. It is a perspective view of the light source in the state removed from the main body case and the spectroscopic means. It is a perspective view of the light source and the spectroscopic means part in the state removed from the main body case shown partially cut away.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 5, 6, 7 Monitoring range confirmation apparatus 8 Main body case 11 Supporting plate 13 Motor 15 Light source 16 Rotating support body 17 Bearing 24 Spectroscopic means holding body 28 Spectroscopic means

Claims (7)

  A light source that irradiates light in a direction perpendicular to the front surface of the flame detector at the position where the flame detector is mounted, and is arranged in front of the light irradiation direction of the light source, and is set in accordance with the monitoring range of the flame detector used. And using the spectroscopic means inclined at an angle, rotating the spectroscopic means to transmit light radiated from the light source and irradiating the center of the monitoring range, and reflecting and irradiating the monitoring range with light. The method of confirming the monitoring range of the flame detector is characterized in that the monitoring range and its center are simultaneously confirmed by the light emitted from the light source.   The method of checking a monitoring range of a flame detector according to claim 1, wherein the light source is a laser unit.   3. The method for confirming a monitoring range of a flame detector according to claim 1, wherein the spectroscopic means is a half mirror.   A main body case fitted on the flame detector or its mounting base, a motor fixed in the main body case, and the main body case so as to irradiate light in a direction perpendicular to the front surface of the flame detector. A rotating support that rotates in parallel with the front surface of the flame detector in the main body case, rotates the motor as a driving source, and is attached to the top of the rotating support; A spectroscopic means holding body that is tilted and held at a predetermined angle according to a monitoring range of the flame detector in front of the light irradiation direction, and transmits light from the light source that is held by the spectroscopic means holding body. A device for confirming the monitoring range of the flame detector, comprising: a light that irradiates the center of the monitoring range, and a spectroscopic means that divides the light into light that reflects and irradiates the monitoring range.   The flame detector monitoring range confirmation device according to claim 4, wherein the spectroscopic means can be adjusted in elevation angle.   6. The flame detector monitoring range confirmation device according to claim 4, wherein the light source is a laser unit. 7. The flame detector monitoring range confirmation device according to claim 4, 5 or 6, wherein the spectroscopic means is a half mirror.

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