JP3387826B2 - Aiming mechanism of the detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor aiming mechanism for aiming a sensor in a predetermined direction.

[0002]

2. Description of the Related Art Today, sensors are widely used as disaster prevention equipment for buildings. As one of such detectors,
2. Description of the Related Art There is a photoelectric sensor that receives light emitted from a light source such as an LED by a light receiving element and detects smoke generation or the like based on a change in the amount of the received light. In such a photoelectric sensor, it is necessary to allow light emitted from a light-transmitting unit such as an LED to enter a light-receiving unit including a light-receiving element, and the optical axis direction of these light-transmitting units and the optical axis of the light-receiving unit. The direction greatly affects the detection sensitivity (hereinafter, if necessary, a sensor having only a light-transmitting unit is referred to as a light-transmitting device, and a sensor having only a light-receiving unit is referred to as a light-receiving device. Collectively, the receiver is simply referred to as a sensor). For this reason, the photoelectric sensor has an aiming mechanism for grasping the optical axis direction of the light receiver with respect to the light transmitter or the optical axis direction of the light transmitter with respect to the light receiver, and the optical axis direction of the light transmitter or the light receiver. An optical axis adjustment mechanism that adjusts in a predetermined direction (predetermined direction for accurate measurement, the same applies below) is provided, and when the sensor is installed using the aiming mechanism and the optical axis adjustment mechanism, The optical axis is adjusted during inspection.

FIG. 6 is a perspective view of a conventional type of photoelectric sensor in which a light transmitter and a light receiver are separately arranged. In FIG. 6, the light transmitter 100 and the light receiver 1
Reference numeral 01 denotes a ceiling-mounted sensor that is fixed on a building sky (not shown) at a predetermined distance from each other, and the detection light sent by a light sending unit (not shown) of the light transmitter 100 is not shown by the light receiver 101. The light is received by the light receiving unit. Here, each of the light transmitter 100 and the light receiver 101 is provided with a pair of front and rear aiming holes 102 and 108 as an aiming mechanism on the lower surface of the housing. These aiming holes 102 and 108 are formed along a plane orthogonal to the optical axis of the light transmitting section or the light receiving section. The back surface of the light receiver 101 (the surface facing the light receiver is the front surface,
The same shall apply hereinafter), and the adjuster stands up and the sight hole 10 of the light receiver 101
The optical axis direction of the light receiving unit is adjusted so that the light transmitter 100 can be seen through the lines 2 and 108. This adjustment is similarly performed for the light transmitting section of the light transmitter 100.

FIG. 7 is also an overall perspective view of a conventional separation type photoelectric sensor. The light transmitter 103 and the light receiver 104 shown in FIG. 7 are arranged so that their rear surfaces are in contact with a wall surface of a building (not shown). It is a sensor with a wall. In this wall-mounted sensor, the aiming mechanism as described above cannot be adopted because the adjuster wants to be able to enter the back surface of the light transmitter 103 and the light receiver 104. Therefore, the light transmitter 103
And the light receiver 104 respectively have a first aiming hole 105,
An aiming mechanism including a second aiming hole 106 and a reflecting mirror 107 is provided. Of these, the first aiming hole 105 is formed along a plane orthogonal to the optical axis of the light transmitting section or the light receiving section, and the field of view that can be seen through the first aiming hole 105 is the reflection mirror 107. It is reflected at and can be seen through the second aiming hole 106. And the coordinator
The optical axis direction of the light receiving unit is adjusted so that the main body of the light transmitting unit 103 facing the light receiving unit can be seen through the second aiming hole 106 of the light receiving unit 104. This adjustment is similarly performed for the light transmitting unit.

[0005]

However, in the conventional sighting mechanism of such a sensor, both the ceiling-mounted sensor shown in FIG. 6 and the wall-mounted sensor shown in FIG. 7 are adjusted. Had to look directly into the aiming hole. Therefore, the beams and pipes of the building are placed near the aiming hole, and if the aiming hole cannot be directly seen, aiming cannot be performed, and the optical axis of the sensor cannot be adjusted. It was On the contrary, in order to carry out aiming, the sensor cannot be placed near the beam or the pipe, and the installation location of the sensor may be limited.

The present invention has been made in view of the problems in the conventional aiming mechanism of such a sensor, and eliminates the need for an operator to look directly into the aiming hole, and allows the adjuster to be located near obstacles such as beams and pipes. It is an object of the present invention to provide a sighting mechanism for a sensor that enables the installation of the sensor.

[0007]

SUMMARY OF THE INVENTION In order to solve the problems in the conventional aiming mechanism of the sensor, the present invention according to claim 1 is to provide a fixing portion fixed to a building and the fixing portion. Which is rotatably linked in a vertical plane and / or a horizontal plane with the moving section, and includes a moving section having a light transmitting section for emitting detection light and / or a light receiving section for receiving detection light. in, the above moving part, the light-sending
When the optical axis of the light-receiving part and / or the light-receiving part faces the specified direction, the other side
It is common to provide a sighting hole for the transmitter or the receiver of the
In addition, a laser emitting section that emits laser light in a direction along the optical axis of the light transmitting section and / or the light receiving section through the sighting hole is attached and detached.
It is configured as being provided in the standing.

The present invention according to claim 2 provides the invention according to claim 1.
In the present invention according to, the laser emitting unit, a first aiming hole arranged in a plane orthogonal to the optical axis of the light transmitting unit and or the light receiving unit, a laser light source for emitting a laser beam, a reflecting portion of the laser beam emitted by the laser light source is reflected toward the first aiming hole, on which is reflected by the reflecting portion
And a second aiming hole for looking into the field of view of the first aiming hole, wherein the laser light emitted by the laser light source is used as the second aiming hole .
It is characterized in that the light can be projected onto the reflecting portion through the sighting hole .

The present invention according to claim 3 provides the invention according to claim 2.
In the invention described, it is emitted by the laser light source
The optical axis of the light-transmitting unit and / or the light-receiving unit is
When facing in the same direction,
It is configured to be irradiated in a circular shape .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sighting mechanism of a sensor according to the present invention will be described in detail below with reference to the drawings.
1 is an overall perspective view of a light transmitter and a light receiver according to this embodiment, FIG. 2 is an exploded perspective view of the light receiver of FIG. 1, and FIG. 3 is a plan view of a lens holder of the light receiver of FIG. In FIG. 1, the sensor according to the present embodiment is a photoelectric sensor with a separable wall, and the detection light transmitted by a light transmitting unit (not shown) of the light transmitter 1 is transmitted from the light transmitter 1. The light is received by a light receiving unit (not shown) of the light receiver 2 arranged at a predetermined distance. Here, each of the light transmitter 1 and the light receiver 2 has an aiming mechanism for grasping an optical axis direction of the light receiver 2 with respect to the light transmitter 1 or an optical axis direction of the light transmitter 1 with respect to the light receiver 2. And an optical axis adjusting mechanism for adjusting the optical axis of the light receiving section or the light receiving section in a predetermined direction. Since the light transmitter 1 has the same configuration as the light receiver 2 except for a light emitting element, its related circuit, and a part of components,
Individual explanation is omitted.

First, the optical axis adjusting mechanism will be described. Figure 2
As shown in FIG. 2, the light receiver 2 is composed of a cover 10 and a main body 11, and the main body 11 is attached to the building by being locked by a mounting plate 12 which is a fixed portion fixed to the building.
A lens holder 13, which is a moving part, is housed inside the main body 11, and detection light is received by a light receiving part (not shown) held by the lens holder 13. Further, the main body 11 is provided with an optical axis adjusting mechanism, and the optical axis adjusting mechanism rotates the lens holder 13 in a vertical plane and / or in a vertical plane to adjust the optical axis of the light receiving portion.

This optical axis adjusting mechanism mainly comprises a main body 11
The base 14 fixed immovably with respect to the base 1
It is composed of a separator 15 fixed immovably with respect to the No. 4 and a support member 16. The lens holder 13 is rotatable with respect to the support member 16 in a vertical plane, and the support member 16 is rotatable with respect to the separator 15 in a horizontal plane, so that the optical axis can be adjusted. First, the optical axis adjusting mechanism in the vertical plane will be specifically described. The lens holder 13 is supported by the support member 16 so as to be rotatable in the vertical direction about the screw 17 as an axis, and the lens holder 13 is mounted on the side surface of the lens holder 13. Has a receiving screw 18. A vertical adjusting screw 19 is screwed into the receiving screw 18, and therefore, when the vertical adjusting screw 110 is rotated, the receiving screw 18 is rotated, and accordingly, the lens holder 13 is vertically moved with respect to the support member 16. Rotate.

Next, the optical axis adjusting mechanism in the horizontal plane will be described in detail. The supporting member 16 is mounted rotatably in the horizontal direction with respect to the base 14 about the mounting screw 20 as an axis. On the bottom of the
Is installed. A horizontal adjusting screw 22 is screwed into the receiving screw 21, and therefore, when the horizontal adjusting screw 22 is rotated, the receiving screw 21 rotates, and accordingly, the support member 16 and the lens holder 13 are attached to the base 14. Rotate horizontally.

Next, the aiming mechanism will be described. This aiming mechanism is configured as a laser emitting section 3 that emits laser light in a direction along the optical axis of the light receiving section. As shown in FIGS. 1 and 3, the laser emitting section 3 includes a first aiming hole 4, a second aiming hole 5, a reflecting mirror 6 serving as a reflecting section, and a laser light source 7. Of these, the first aiming hole 4, the second aiming hole 5 and the reflection mirror 6 have the same structure as that used in the aiming mechanism of the conventional sensor with a wall. As shown in FIGS. 1 and 3, the first aiming hole 4 is formed in the aiming substrate 8 provided on the upper surface of the lens holder 13. The sighting substrate 8 is arranged along a surface orthogonal to the optical axis of the light receiving portion, and is formed integrally with the lens holder 13. Then, the first aiming hole 4 is formed as a through hole formed in the aiming substrate 8 by a drill (not shown) that advances along the optical axis of the light receiving portion. Therefore, like the aiming substrate 8, the first aiming hole 4 is arranged along a plane orthogonal to the optical axis of the light receiving portion.
The optical axis direction of the light receiving portion of the light receiver 2 can be grasped by looking at the light transmitter 1 via the. That is, when the main body of the light transmitter 1 is visible in the center of the visual field of the first aiming hole 4, the optical axis direction of the light receiving portion of the light receiver 2 is the predetermined direction.

The second aiming hole 5 and the reflecting mirror 6 are
This is for viewing the field of view of the first aiming hole 4 from a direction other than the back surface of the light receiver 2 because an adjuster cannot enter the back surface of the light receiver 2. Of these, the reflection mirror 6 is fixed to the upper surface of the lens holder 13, and as shown in FIGS. 1 and 3, a position closer to the back surface in the direction along the optical axis direction of the light receiving portion with respect to the first aiming hole 4. It is provided in.
Further, as shown in FIGS. 1 and 3, the second aiming hole 5 is formed as a through hole formed at a lateral end portion of the aiming substrate 8 which is slightly bent to the back side. The second aiming hole 5 is arranged symmetrically with the first aiming hole 4 with respect to the normal line of the reflecting mirror 6. Therefore, the visual field that can be seen through the first aiming hole 4 is reflected by the reflecting mirror 6 and can be seen through the second aiming hole 5.

The first aiming hole 4 similar to the conventional one,
The laser light source 7 provided in addition to the second aiming hole 5 and the reflection mirror 6 emits laser light that is parallel light, and is a laser unit of any type including a gas laser and a semiconductor laser. As shown in FIGS. 1 and 3, the laser light source 7 is arranged at a position on the upper surface of the lens holder 13 on the non-reflection mirror 6 side of the second aiming hole 5. The laser light source 7 is arranged so that it can project laser light along a straight line connecting the second aiming hole 5 and the reflection mirror 6. Therefore, the laser light emitted from the laser light source 7 reaches the reflection mirror 6 through the second aiming hole 5, is further reflected by the reflection mirror 6, and passes through the first aiming hole 4 in the optical axis direction of the light receiving portion. Light is projected along (in FIGS. 1 and 3,
This laser light is shown by the imaginary line). The power source of the laser light source 7 can be freely turned on / off by a switch (not shown), and the power source is turned on only when necessary by an operator. However, to simplify the adjustment work, the cover 1 in FIG.
The power may be automatically turned on when 0 is opened to the main body 11.

Here, the laser light source 7 includes a lens holder 13
Is removably attached by known means including screwing. Therefore, the laser light source 7 can be easily removed from the lens holder 13, and in the state where the laser light source 7 is removed in this manner, the first aiming hole 4, the second aiming hole 5 and the reflection hole configured as in the conventional case Mirror 6
Aiming can be done using only. That is, until the first sighting hole 4 of the light transmitter 1 can be seen at the center of the visual field of the first sighting hole 4 reflected by the reflection mirror 6 through the second sighting hole 5, The optical axis adjustment is performed via the optical axis adjustment mechanism. Further, since the first aiming hole 4, the second aiming hole 5 and the reflecting mirror 6 are common with the aiming mechanism of the conventional sensor, it is possible to achieve dual use of parts and reduce the manufacturing cost. it can.

Next, the aiming by the aiming mechanism using the laser light source 7 will be described. FIG. 4 is a front view around the first sighting hole 4 of the light transmitter 1 (see FIG. 4 and FIG.
In FIG. 3, the irradiation range of the laser light emitted from the laser light source 7 is indicated by diagonal lines. As shown in FIG. 4, the state where the laser beam is concentrically applied to the first aiming hole 4 of the light transmitter 1 is the first aiming hole 4 and the light receiver 2 of the light transmitter 1. And the first aiming hole 4 is arranged along the optical axis direction of the light receiving section, that is, the optical axis direction of the light receiving section faces a predetermined direction. Therefore, the coordinator turns on the power of the laser light source 7 of the light receiver 2 and visually confirms which part of the light transmitter 1 is irradiated with the laser light emitted from the laser light source 7. Then, as shown in FIG. 4, the optical axis adjusting mechanism is used to adjust the optical axis of the light receiving section so that the first aiming hole 4 of the light transmitter 1 is irradiated with the laser light concentrically.

The first aiming hole 4, the second aiming hole 5, the reflecting mirror 6 and the laser light source 7 which constitute the laser emitting section 3 are all mounted on the lens holder 13 which is the moving section as described above. ing. Therefore, when the position of the lens holder 13 with respect to the mounting plate 103 serving as the fixed portion is adjusted by the optical axis adjusting mechanism, the position of the laser emitting portion 3 with respect to the mounting plate 103 moves with the adjustment, and the laser with respect to the light transmitter 1 is moved. The light irradiation position moves.

Although one embodiment of the present invention has been described so far, the present invention is not limited to the above-described embodiment and may be implemented in various different forms within the scope of the technical idea thereof. Yes, these different forms will be described below. First, in the above-described embodiment, the laser emitting section 3 is configured by the first aiming hole 4, the second aiming hole 5, the reflecting mirror 6, and the laser light source 7, but it is configured by only the laser light source 7. May be. That is, only the laser light source 7 may be attached to the lens holder 13 so that the optical axis direction of the laser light emitted from the laser light source 7 is along the optical axis direction of the light receiving portion. In this case, the configuration is the simplest, and the aiming with the laser light can be performed. Besides this,
It is possible to provide only the laser light source 7 on the back surface of the first aiming hole 4 and omit the second aiming hole 5 and the reflection mirror 6, or to omit only the second aiming hole 5. Further, the laser light source 7 may be fixedly attached instead of being detachable.

Further, in the above-described embodiment, the separate type sensor in which the light transmitter and the light receiver are separated has been described. However, in the integrated type photoelectric sensor in which the light transmitter and the light receiver are housed in one housing. The present invention may be adopted. This integrated photoelectric sensor irradiates the detection light emitted from the light-transmitting part of the sensor to a reflector plate which is arranged at a predetermined distance from the detector, and senses the detection light reflected by the reflector plate. The light is received by the light receiving portion of the container. The first aiming hole 4, the second aiming hole 5, the reflecting mirror 6 and the laser light source 7 are provided on the upper surfaces of the light receiving portion and the light transmitting portion of such a sensor, respectively. The emitted laser light is applied to the reflector.
FIG. 5 is a front view of the reflector 9. As shown in FIG. 5, the state in which the laser light is applied to the central positions of the upper, lower, left and right sides of the reflection plate 9 is the state in which the optical axis direction of the light receiving portion and / or the light transmitting portion is directed in a predetermined direction. Therefore, as shown in FIG. 5, the optical axis of the light receiving portion and / or the light transmitting portion is adjusted by using the optical axis adjusting mechanism so that the center of the reflector is irradiated with the laser light.

[0022]

As described above, according to the present invention as set forth in claim 1 , the moving section is provided with the laser emitting section for emitting the laser beam in the direction along the optical axis of the light transmitting section and / or the light receiving section. As described above, the direction of the optical axis of the light receiving portion or the light transmitting portion can be confirmed by visually observing the position of the irradiated laser light, and therefore the optical axis can be adjusted without directly looking through the aiming hole. Therefore, it is possible to easily adjust the optical axis of the sensor even if the building beam or pipe is placed near the sighting hole, and conversely, it is possible to place the sensor near the beam or pipe. , The installation range of the sensor can be expanded. On the other hand, the optical axes of the light-transmitting unit and / or the light-receiving unit are oriented in a predetermined direction.
Aiming hole where the other party's light-transmitting part or light-receiving part comes into view
By providing the laser emitting part is detachable,
When the laser emitting part is removed,
The optical axis can be adjusted by looking directly into the hole. Sanawa
In the present invention, a method for directly looking through the aiming hole and a laser
Both methods of irradiating the light with the same sighting trajectory
Can be done and therefore laser emitting section if required
By attaching and detaching, the optical axis can be adjusted by a simple device.
be able to.

Further, in the present invention according to claim 2 , the laser emitting section is provided with a second aiming hole for looking into the visual field of the first aiming hole reflected by the reflecting section, and the laser light source emits light. It is possible to project the generated laser light onto the reflecting portion through the second aiming hole, so that the first aiming hole and the second aiming hole that are configured in the same manner as the conventional one when the laser light source is removed. Aiming can be performed by using only the reflection mirror.
Therefore, it is possible to achieve the common use of almost all the parts relating to the conventional sensor and aiming, and to reduce the manufacturing cost. Furthermore, the present invention according to claim 3 provides a laser beam.
Is when the optical axis of the light transmitter and / or the light receiver faces in a predetermined direction.
Irradiation is done concentrically to the first aiming hole of the irradiation destination.
With, the adjustment base can be adjusted when adjusting the optical axis using laser light.
You can easily understand the relations.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a light transmitter and a light receiver according to an embodiment of a sighting mechanism of a sensor of the present invention.

FIG. 2 is an exploded perspective view of the light receiver of FIG.

FIG. 3 is a plan view of a lens holder of the light receiver of FIG.

4 is a front view around the sighting substrate of the light transmitter of FIG. 1. FIG.

FIG. 5 is a front view of a reflector according to another embodiment.

FIG. 6 is an overall perspective view of a conventional top-mounted sensor.

FIG. 7 is an overall perspective view of a conventional sensor with a wall.

[Explanation of symbols]

1 light transmitter 2 light receiver 3 Laser emission part 4 First sighting hole 4 5 Second sighting hole 6 reflection mirror 7 Laser light source 8 Aiming board 9 Reflector 10 covers 11 body 12 Mounting plate 13 Lens holder 14 base 15 separator 16 Support member 17 screws 18, 21 Receiving screw 19 Vertical adjustment screw 20 mounting screws 22 Leveling screw

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G08B 17/103 G01N 21/59

Claims (3)

(57) [Claims] 1. A light-transmitting part and / or a detection part, which is rotatably linked to a fixed part fixed to a building and rotatably in a vertical plane and / or a horizontal plane with respect to the fixed part. In the sighting mechanism of the sensor, which comprises a moving part having a light receiving part for receiving light, the moving part has an optical axis of the light sending part and / or the light receiving part.
When facing in a fixed direction, the transmitter or receiver of the other party will be in the field of view.
A sensor characterized in that a sighting hole for entering is provided, and a laser emitting section for emitting a laser beam in a direction along the optical axis of the light transmitting section and / or the light receiving section is detachably provided through the sighting hole. Aiming mechanism. 2. The laser emitting section includes a first aiming hole arranged in a plane orthogonal to an optical axis of the light transmitting section and / or the light receiving section, a laser light source for emitting laser light, and the laser light source. And a first reflecting portion that reflects the laser light emitted by the reflecting portion toward the first aiming hole and the reflecting portion.
And a second sighting hole for looking through the field of view of the semi-holes, the laser beam emitted by the laser light source the second irradiation
The aiming mechanism of the sensor according to claim 1, wherein light is freely projected onto the reflecting portion through the aiming hole . 3. Laser light emitted from the laser light source
Means that the optical axes of the light transmitting unit and / or the light receiving unit face a predetermined direction.
The first aiming hole of the irradiation destination in a concentric pattern.
Sensors of the aiming mechanism according to the claim 2, characterized in that it is Isa.