JP2552200B2 - Separated dimming smoke detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention detects a light attenuation due to smoke when smoke and a smoke penetrate between the light emitter and the light receiver facing each other with a predetermined distance. The present invention relates to a separated type dimming type smoke detection device for detecting a fire.

[Prior Art] An example of a conventional separation type dimming type smoke sensing device is shown in FIGS.
Shown in the figure. This separated type dimming type smoke sensing device is used for mounting a main body (7) of a projector or a light receiver (both are substantially the same structure, and the light receiver will be described below) and a main body (7) to a mounting portion such as a wall surface. And a cover (9) for covering the base (8) and the main body (7).

Then, the main body (7) of the light receiver is provided with a light receiving portion (71) provided with a light receiving element (light emitting element in the case of a light projector), and the printed circuit boards (72) (73) are attached to the back surface and the lower portion thereof. On the side, there are a distance setting switch (74) for setting the approximate distance between the sender and the receiver, a monitoring / adjustment changeover switch (75), a light quantity adjustment indicator lamp (76), a light quantity adjuster (77), etc. It is provided. In addition, (78) is an aiming section including a viewing window, a reflecting mirror and an aiming hole, (79), (79a), (7
9b) is an optical axis adjusting screw, (80) is an electric wire such as a power line and a signal line, and (91) and (92) are fire lights and trouble lights provided on the front surface.

In order to install such a light receiving unit, first, the base (8) is screwed and fixed to an outlet box, a switch box, or the like provided on a wall surface or the like. Next, the electric wire (80) such as the power supply line and the signal line drawn from the outlet box and the switch box is drawn out from the insertion hole (81), and is connected to the lead wire connected to the printed board (72) of the main body (7). The wires are connected and insulated with an insulating tape, and the main body (7) is locked by the locking piece (82) provided on the base (8) and attached.

Then, the monitor / adjustment switch (75) provided on the side of the main body (7) is set to the adjustment side, and the optical axis adjustment screw (79) is set.
(79b) to adjust the angle of the light receiving unit (71), and operate the distance setting switch (74), the light amount adjuster (77), etc., to obtain a predetermined output. After these adjustments are completed, the monitor / adjustment changeover switch (75) is set to the monitor side to bring it into the monitor state.

[Problems to be Solved by the Invention] In the conventional separate type dimming type smoke sensing device configured as described above, the lead wire connected to the printed board (72) provided in the main body (7) and the fire receiver. And other electric wires from the body (80)
Since the connection with the main body (7) has to be performed one by one while supporting the main body (7) at a high position close to the ceiling surface, the connection work is very troublesome and there is a problem in safety management.

Also, various switches (74), (75), indicator lights (76)
Furthermore, since the light quantity adjuster (77) is installed on the side surface of the main body (7), if the installation location is close to a wall surface, it will be difficult to make adjustments during installation or during regular inspections. was there.

The present invention has been made to solve the above problems,
The remote type reduction that allows easy connection between the electric wire from the fire receiver or other main body and the printed circuit board provided on the receiver and allows easy adjustment even if the receiver is installed close to the wall surface. The purpose is to obtain an optical smoke detector.

[Means for Solving the Problems] A separation type dimming type smoke sensing device according to the present invention includes a base for accommodating a printed circuit board, a rotary base rotatably mounted on the base. A main body including a light emitter or a light receiver pivotally mounted on the rotary base so as to be rotatable in a direction substantially orthogonal to the rotation direction thereof, and a fixture for mounting the base on a base, a receiver, and the like. It has a terminal block to which electric wires from the main body etc. are connected,
The light emitting device and the light receiving device include the base for mounting the main body on a wall surface and the like, and a cover for covering the main body.

Further, a connector is connected to the output side of the terminal block, and the printed board is provided with a connector to be coupled with this connector.

Further, an operating portion is provided on the front surface of the main body of each of the above-mentioned projector and receiver.

[Operation] First, fix the base by screwing it to the switch box or outlet box embedded in the wall. Then,
Attach the main body to the base with the fixture, connect the connector of the terminal block to the connector of the printed circuit board, and rotate the rotary table provided on the base to turn the optical axis in the desired direction. Adjust the position of. After various adjustments are made by the operation unit, the monitor is set and the cover is fitted from the front.

FIG. 1 is a front view of an embodiment of the present invention showing a state in which a front surface of a cover is cut off, FIG. 2 is a longitudinal sectional view, and FIG. 3 is A in FIG.
FIG. 4 is a perspective view of the cover, and FIG. 5 is an exploded perspective view of the main body and the base. In the figure, (1) is a main body, (2) is a cover, and (3) is a base.

In the main body (1), (11) is a box-shaped base, and columns (111) having engaging holes (112) as first attachments are provided upright on both sides of the back surface. (12) is a substantially semi-disc-shaped first rotary base for horizontal angle rough adjustment, which is rotatably fixed to a shaft (14) fixed to a base (11) and near the outer edge. An arcuate slot (121) is provided in the. (1
22) is a fixing screw for horizontal angle coarse adjustment screwed into the base (111) through the slot (121), and (123) is a screw insertion through which the horizontal angle fine adjustment screw (61) is inserted. It's a hole.

(13) is a second rotary table for reverse angle fine adjustment of horizontal angle.
It is provided on the first turntable (11) and is rotatably attached to the shaft (14) via a convex portion (132) formed on the horizontal portion (131). Reference numeral (133) is a fitting hole for a pin (151a) of a light receiving portion (15) described later, and (134) is provided so as to face a screw insertion hole (123) provided in the first rotary table (12) and is inserted therethrough. Hole (1
The horizontal angle fine adjustment screw (61) inserted into the screw hole (23) is screwed into the screw hole for connecting the first rotary table (12) and the second rotary table (13), and (135) is the second screw hole. The turntable (13) and the receiver (1
5) A screw hole into which the vertical angle fine adjustment screw (62) that connects to and is connected.

Reference numeral (15) is a light receiving section, the details of which are shown in FIGS.
This is shown in FIG. 9 and FIG. (151) is a funnel-shaped case made of synthetic resin with a lens (16) mounted on the front surface, and (152) is an optical axis aiming section integrally formed with the upper part of the case (151). 15) A pair of viewing windows (153) provided on both sides of the position oblique to the optical axis, and a pair of reflecting mirrors (154).
And a pair of aiming holes (155) provided parallel to the optical axis. Reference numeral (156) denotes a mounting portion of a holder (17) provided at a rear portion of the case (151), and includes a stopper (157), a plurality of locking claws (158), and the like.

The optical axis aiming section (15) of the receiving section (15) configured as described above.
2) Peep windows (153) and reflectors (15)
4) and the sighting hole (155) are on the same side as the reflecting mirror (154) when the reflecting mirror (154) facing the optical axis is viewed from one viewing window (153). The aiming holes (155) are arranged so that they can be seen, so that even if there is an obstacle such as a wall on the right or left side, as well as behind the light receiver, avoid obstructions and obliquely from the opposite side. Optical axis alignment between the light emitter and the light receiver can be performed.

(17) is a mounting part (156) provided at the rear of the light receiving part (15)
The holder of the light-receiving (light-emitting) element (4) mounted on the above is shown in detail in FIGS. 7 to 9. (171) is a cylindrical body, (17)
2) is a partition, (173) is a mount of the light receiving element (4) provided on one surface of the partition (172), and (174) is a light receiving element (4).
Through hole for the lead wire (41), (175) for mounting the light emitting element (5) provided on the other surface of the partition wall (172), and (176) for inserting the lead wire (51) of the light emitting element (5). It is a hole. Further, (177) is provided at both ends of the cylindrical body (171) and engages with the engaging claw (158) of the case (151).
Is the lead wire (41) of the light receiving element (4) or the light emitting element (5)
Is a printed circuit board to which the lead wire (51) is connected.

When the light receiving element (4) is mounted on the mount (173) as shown in FIG. 8, the partition (172) is positioned such that the light receiving surface of the light receiving element (4) is at the focal position of the lens (16). When the light emitting element (5) is mounted on the mount (175) as shown in FIG. 9, the light emitting point of the light emitting element (5) is slightly closer to the lens (16) than the focal position of the lens (16). That is, the light emitted from the light emitting element (5) is emitted by the lens (16) forward from the projector as a light beam slightly wider than the parallel light, and the light receiving element (4) is emitted by the lens (16). It is provided at a position where parallel light to be received is received. As a result, the light receiving portion excluding the light receiving element (4) and the light emitting element (5), the light projecting portion, and the components can be shared.

Reference numeral (18) is a printed circuit board housed in the base (11) and fixed horizontally, and (18a) is a connector attached to the printed circuit board (18) directly or via an electric wire.

(19) is an operation unit provided on the front of the base (11).
(191) is a fire light that lights up in the event of a fire, (192) is a trouble light that lights up when an abnormality occurs in the light emitter or light receiver,
(193) is a monitoring / adjustment switch for selecting a monitoring state and an adjustment state, and (194) is a reset switch for resetting a stored value of a light receiving output when there is no smoke. Also,
(195) is a distance setting changeover switch that switches the sensitivity according to the distance between the light emitter and the light receiver, (196) is a coarse adjustment volume for keeping the light reception output that changes depending on the distance between the light emitter and the light receiver, (197) is also the fine adjustment volume, (198) is a sensor output terminal for extracting the light reception output at the time of sensitivity adjustment, etc. (199) is a standby power supply for supplying power to external equipment such as a tester. At terminals, these are connected to the conductive pattern of the printed circuit board (18) or are connected to the electrical components mounted on the printed circuit board (18).

In the present invention, since the operation section (19) as described above is provided on the front surface, adjustment / inspection is performed together with the optical axis aiming section (152) of the light receiving section (15) during optical axis adjustment, installation or maintenance inspection. It can be performed from the front of the sender or receiver, and even if there is an obstacle such as a wall on the back or left or right of the sender or receiver, it is not affected by the obstacle and adjustment and inspection can be performed at any place. Can be done.

In the cover (2), (21) is a window plate having an arcuate cross section that also serves as an optical filter, (22) is a cover plate that normally covers various switches, volume, terminals, etc. of the operation section (19), and (23) is Fire light window, (24) is trouble light window.

In addition, by using the window plate (21) also serving as an optical filter, the cost can be reduced as compared with a case where the lens (16) has optical filter characteristics.

In the base (3), (31) is a terminal block to which a pair of wires from a light receiver or a light transmitter or a wire from a fire receiver or the like is connected, and this terminal block (31) has a connector (18b). The wires are connected. (32) is the wire insertion port,
(33) is an engaging hole (11) provided in the support (111) of the base (11).
2) Engagement piece that engages, (34) is a screw groove for fixing, (3)
5) is a fixing screw hole, and (36) is an adjusting groove that communicates with the screw hole (35) and adjusts the mounting angle of the base (3).

The base (3) has a pair of screw grooves (34), a pair of screw holes (35), and an adjusting groove (36) communicating therewith.
The base (3) can be rotated about one of the pair of screw grooves (34) as a fulcrum even if the switch box or the outlet box, which is the mounting surface of the base (3), is inclined. (3) can always be mounted in the correct position. Also, since the terminal block (31) and the printed board (18) provided in the base (11) are connected using the connector (18a) provided on the printed board (18), the connection is extremely high. Easy.

In order to assemble a light receiver composed of the above parts, first, the horizontal angle fine adjustment screw (61) is inserted into the screw insertion hole (123) of the first turntable (12), and then the coil spring (63). And is screwed into the screw hole (134) of the second rotary table (13) to connect the first and second rotary tables (12) and (13). Also,
The holder (17) to which the light receiving element (4) is attached is fitted into the mounting portion (156) of the light receiving portion (15), and the locking claw (158) is provided in the engaging groove (177) and the rear surface of the printed circuit board (178). Engage with.
Next, the pin (1) provided on the case (151) of the light receiving part (15)
51a) is fitted into the fitting hole (133) of the second turntable (13) to attach the light receiving part (15) to the second turntable (13),
After inserting the screw (62) into the screw insertion hole (159), the coil spring (64) is inserted, and the screw hole (13) of the second rotary base (13) is inserted.
It is screwed into 5) to connect the second turntable (13) and the light receiving section (15).

Next, for example, the base (3) is screwed and fixed to a switch box or an outread box embedded in a wall or the like. At this time, it is necessary to use the screw groove (34) and the adjustment groove (36) to mount the device correctly without inclination. Then, an electric wire from the receiver or the projector is drawn out from the insertion port (32) and connected to a predetermined place of the terminal block (31) by screwing or the like.

Then, the engaging hole (1) provided on the column (111) of the base (11)
12) is engaged with the engaging piece (33) of the base (3), and a screw is inserted through the insertion hole (37) provided in the lower part of the base (3),
Screw holes (113) that are the second fixtures provided on the base (11)
Secure by screwing into. At this time, the terminal block (31) is easily housed in the space (114) formed by the base (11), the support (111) and the rear of the light receiver (15). In this state, the connector (18h) extending from the terminal block (31) is connected to the connector (18a) provided on the printed board (18) of the base (11).

Next, look into the viewing window (153) diagonally from the front of the base (11), and finely adjust the horizontal angle until the opposing projector can be seen through the sighting hole (155), that is, until the optical axes of the receiver and the projector are aligned. Rotate the adjustment screw (61) and the vertical angle fine adjustment screw (62) to adjust. When the adjustment is completed, set the distance setting changeover switch (195) to the position corresponding to the distance between the light emitter and the light receiver, supply power to the light receiver and light emitter from the receiver, etc. Tilt (193) to the adjustment side. Next, a tester is connected to the sensor output terminal (198) and the light receiving output of the light receiving element (4) is checked, and the volumes (196) and (197) are adjusted so that the light receiving output by the light emission of the light emitter becomes a predetermined value. adjust.

If the optical axis cannot be adjusted with the horizontal angle fine adjustment screw (61), loosen the fixing screw (122) of the base (11) in advance and set the optical axis of the light receiving unit (15) to the desired value. The first rotary table (12) is rotated until it faces the direction of, and is fixed by the fixing screw (122) to perform rough adjustment.

When the optical axis adjustment and the sensitivity adjustment are completed, the monitor / adjustment changeover switch (193) is tilted to the monitor side, the cover (2) is fitted from the front, and the upper and lower sides are fixed to the base (3) by screwing. .

Although the embodiments of the light receiver according to the present invention have been described in detail above, the configuration of the light projector is almost the same as that of the light receiver. Further, the shape, mechanism, and the like of each part are not limited to those in the above-described embodiment, but can be variously modified.

[Effects of the Invention] As is clear from the above description, according to the present invention, the printed circuit board is housed in the base of the main body, the rotary base for adjusting the optical axis is provided on the base, and the rotary base is used for projecting. Since the terminal block attached to the base is housed in the space formed on the back surface of the light emitter or the light receiver, the light receiver or the light receiver is held, so that the electric wire such as the signal line and the emitter or the light receiver are Connection is facilitated, and a projector and a light receiver having a shallow depth can be obtained.

Also, while connecting the connector to the output side of the terminal block,
Since the connector for connecting the printed circuit board to this connector is provided, the work of connecting the electric wires is extremely easy, the working time at a high place can be shortened, and the safety can be improved.

Further, since the operation unit is provided on the front surface of the main body, even when the light emitter and the light receiver are set at positions where the side surface or the rear surface thereof is close to the wall surface, etc., adjustment at the time of installation, maintenance and inspection can be easily performed. it can.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention showing a state in which a front surface of a cover is cut off, FIG. 2 is a longitudinal sectional view, and FIG.
A sectional view, FIG. 4 is a perspective view of an embodiment of a cover, FIG. 5 is an exploded perspective view of an embodiment of a main body and a base, FIG. 6 (a) is a sectional view of an embodiment of a light receiving unit case, b) is a rear view, FIG. 7 (a) is a cross-sectional view of an embodiment of the holder, (b) is a left side view thereof, (c) is a right side view thereof, and FIG. FIG. 9 is a sectional view of an embodiment of the light receiving section, and FIG.
FIG. 11 is a front view of an example of a conventional light receiver showing a state in which a front surface of a cover is cut off, and FIG. 11 is a longitudinal sectional view. (1) is the main body, (11) is the base, (12) is the first turntable,
(13) is a second turntable, (111) is a column, (114) is a space part, (15) is a light receiving part, (16) is a lens, (152) is an optical axis aiming part, and (17) is a holder. , (4) is a light receiving element, (5) is a light emitting element, (18) is a printed circuit board, (18a) and (18b) are connectors, (19) is an operation part, (2) is a cover, and (3) is a base. , (31) is the terminal block.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshinori Igarashi, 4-7-3 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (72) Kentaro Higashi 4--7-3, 9danmin, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (72) Inventor Masamitsu Ohashi 4-7-3 Dandan Minami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd.

Claims (3)

(57) [Claims] 1. A base for accommodating a printed circuit board, a rotary base rotatably mounted on the base, and a rotary shaft for rotation on the rotary base in a direction substantially orthogonal to the rotation direction. The main body including a stopped light-transmitting unit or light-receiving unit and a fixture for attaching the base to the base, and a terminal block to which an electric wire from a receiver, another main unit, or the like is connected. A separate type dimming type smoke detection device comprising a light emitter and a light receiver which are composed of the base for mounting on a wall surface and the like, and a cover for covering the main body. 2. The separation type dimming smoke according to claim 1, wherein a connector is connected to the output side of the terminal block, and a connector to which the connector of the terminal block is coupled is provided on the printed circuit board. Sensing device. 3. The separation type dimming type smoke detection device according to claim 1, wherein the operation portion is provided on the front surface of the main body.