JPH0454550Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a warning direction adjustment mechanism for a hot-wire type detector that can freely adjust the warning direction within a 360° range.

(Prior art) Conventionally, heat ray detectors that detect heat rays emitted from the human body and output alarm signals have directivity in the detection direction of the heat rays, so when installed on a ceiling surface, for example, The warning direction is determined in advance and fixed with screws.

In addition, in order to be able to adjust the warning direction during installation, for example, as shown in FIG.
The mounting screw hole 0 is made into an elongated hole 102, and the warning direction of the detector main body 106 can be adjusted within the range of the elongated hole 102 while the mounting base 100 is screwed to the ceiling surface 104 as shown in FIG. ing.

(Problem to be solved by the invention) However, in the case of such a conventional warning direction adjustment mechanism, for example, in the case of an installation method in which a wiring box is installed on the back side of the ceiling surface, it is difficult to fix the wiring box with screws. Since the position is fixed and there are limits to adjustment using the elongated holes in the mounting base, there was a problem in that it was not possible to completely point in the warning direction, resulting in a blind spot.

Of course, the adjustment range can be expanded by enlarging the elongated hole in the mounting base, but there is also a limit to the size of the elongated hole, and there is a problem in that the strength of the mounting base is reduced.

Furthermore, there are some cases where the optical system built into the detector body is rotatable, but this optical system has a heat ray detection element integrated into it and is connected to the detector circuit by a signal line. There were also limits to the adjustment range of the optical system.

(Means for Solving the Problems) The present invention was made in view of these conventional problems, and it is possible to freely rotate the entire detector including the optical system in a 360° direction with respect to the mounting base. The purpose of the present invention is to provide a warning direction adjustment mechanism for a hot-wire detector with excellent adjustment functions.

In order to achieve this purpose, the warning direction adjustment mechanism of the hot-wire detector of the present invention has a mounting base 1 that is screwed and fixed to a ceiling surface, etc., and a rotating mechanism between the mounting base 1 and the ceiling surface, etc. a freely positioned base member 2;
It consists of a detector main body 3 which is screwed and fixed to the base member 2 with the mount 1 interposed therebetween, and the mount 1 is made of a cylindrical member, with a wiring extraction hole 9 in the center of the cylindrical member. At the same time, a flange 10 is formed on the lower edge of the outer periphery to prevent the base member 2 from coming off, and is further located inside the base member 2 in the radial direction from the circumferential surface of the cylindrical member to prevent the mounting base itself from coming off. A slip-off preventing portion 11 is formed, a mounting screw hole 12 is formed on the flat surface of the slip-off preventing portion 11, and a locking pawl 13 is formed on the side surface of the base member 2.
is a disc-shaped member in which a through hole 14 corresponding to the planar shape of the mounting base 1 excluding the flange 10 is formed in the center, and an engaging claw that engages with the detector main body 3 is provided on the outer periphery of the disc-shaped member. 19, and the detector main body 3 further includes a fixing protrusion 18 that is pressed against the surface of the flange 10 of the mount 1 when screwed to the base member 2 with the mount 1 interposed therebetween. With,
It is provided with an engagement receiving portion 20 that engages the engagement claw 19 of the base member 2.

(Function) In the warning direction adjustment mechanism of the hot-wire detector according to the present invention having such a configuration, the mounting base is fitted into the through hole of the base member from below, and the mounting base is inserted into the through hole formed in the radial direction of the base member. Fix the mounting base to the ceiling surface etc. with screws using the mounting screw holes in the drop-off prevention part.

When the mounting base is fixed, the base member is rotated 360 degrees with respect to the mounting base, with the flange of the mounting base located below the through hole, and the pull-out prevention part extending in the radial direction located above the through hole. It is rotatably supported in the direction.

Next, when the detector body is inserted into the lower side of the base member, which is rotatably mounted on a ceiling surface etc. by means of a mounting base, with the cover removed, both the engagement claws and the engagement receivers will engage. are fitted together, and in this state, the warning direction of the detector body can be rotated and adjusted to an appropriate direction.

Once the adjustment of the warning direction is completed, screw the detector body to the base member using the mounting screw and fix it. This screw-in fixation will cause the flange of the mounting base to be between the base member and the detector body. Furthermore, the fixing protrusion formed on the upper surface of the detector body comes into pressure contact with the surface of the flange, thereby restricting movement of the base member and the detector body with respect to the mounting base.

(Embodiment) FIG. 1 is an exploded view showing an embodiment of a hot-wire type detector equipped with a warning direction adjustment mechanism of the present invention.

First, the configuration will be explained. Reference numeral 1 denotes a mounting base, which is fixed to a ceiling surface, wall surface, etc. with screws. Reference numeral 2 denotes a base member, which is rotatably located between the mounting base 1 and the ceiling surface or the like. Furthermore, 3 is a detector main body, which is screwed and fixed to a base member 2 with a mounting base 1 fixed to a ceiling surface or the like interposed therebetween as shown in the figure.

A printed circuit board 4 on which a detector circuit is mounted is mounted on the detector main body 3, and a circuit protection board 5 is mounted next to this printed circuit board 4. Further, the detector main body 3 is integrally provided with a sensor mounting portion 6, and a sensor unit 8 containing a built-in detection element 7 made of an infrared sensor such as a pyroelectric element is mounted to the sensor mounting portion 6. In addition, the detector body 3, the printed circuit board 4
The circuit protection nameplate 5 is attached to the base member 2 with screws 16.

Furthermore, a cover 9 made of a translucent synthetic resin material such as polyethylene is attached to cover the lower side of the detector body 3.

FIG. 2 is an explanatory diagram showing the mounting base 1 and base member 2 in FIG. 1 taken out.

In FIG. 2, the mounting base 1 is made of a thin cylindrical member, and a wiring extraction hole 9 is formed in the center of the upper part of the cylindrical member, and a flange part 10 is formed at the lower edge of the outer periphery of the cylindrical member. . Further, a pull-out prevention part 11 with a U-shaped cross section is formed that opens downward in the radial direction from the circumferential surface of the cylindrical member, and a mounting screw hole 12 for mounting to a ceiling surface, etc. is formed in the flat part of this pull-out prevention part.
Further, locking claws 13 are formed on both sides of the slip-off preventing portion 11 to prevent it from slipping downward (outside).

On the other hand, the base member 2 is made of a disc-shaped member, and a through hole 14 is formed in the center of the disc-shaped member. It has a shape. Therefore, when fixing the mounting base 1 to the ceiling surface with screws with the base member 2 interposed between them as shown in the figure, the mounting base 1
can fit into the through hole 14 of the base member 2 and pop out upward, and the insertion position of the mount 1 is determined by the abutment position of the flange 10 against the lower opening surface of the through hole 14. In addition, base member 2
When fitting the mounting base 1 into the through hole 14 of the mounting base 1, the locking claw 13 formed on the side surface of the radially extending fall-off prevention part 11 of the mounting base 1 fits into the upper side (back side) of the base member 2. The fitting of the locking pawl 13 prevents the mounting base 1 itself from coming off from the base member 2.

In addition, a mounting base 1 is provided on the inner circumferential side of the lower surface of the base member 2.
A terminal block 15 is provided for connecting the signal line drawn in through the wiring lead-out hole 9, and a screw hole 31 into which the screw 16 shown in FIG. 1 is screwed is also provided.

FIG. 3 is a cross-sectional view showing the state in which the hot-wire type detector consisting of the mounting base 1, base member 2, and detector main body 3 shown in FIGS. 1 and 2 is fixed to a ceiling surface.

In FIG. 3, the mounting base 1 is fitted into the through hole 14 of the base member 2 at a position determined by the collar 10,
The upper surface of the mounting base 1 is in a state of protruding above the base member 2. In this state, the detector body 3 is screwed into the screw hole 31 of the base member 2 from below with the mounting screw 16, and the detector body 3 is screwed and fixed to the base member 2, and the mounting base 1 is fixed in the meantime. The flange 10 is now in position, and the flange 10 of the mounting base 1 is clamped and fixed between the base member 2 and the detector main body 3 as shown in the figure by tightening the screws.

FIG. 4 is an enlarged cross-sectional view of part A in FIG.
The base member 2 is clamped and fixed by the detector main body 3, and the base member 2 is attached to the mounting base 1 in this fixed state.
In order to suppress the movement of the detector body 3, the mounting base 1
A fixing protrusion 18 consisting of a plurality of protrusions is formed on the surface of the detector main body 3 facing the lower surface of the flange 10 . The fixing protrusion 18 formed on the surface of the detector body 3 is formed as shown in the plan view of the detector body 3 in FIG.

Furthermore, FIG. 3 clarifies the engagement relationship between the base member 2 and the detector main body 3.

That is, on the left inner circumference of the base member 2, an engaging claw 19 is provided facing downward.
An engagement receiving portion 20 is formed on the upper side of the detector main body 3 facing the detector body 9 .

Furthermore, the cross-sectional view in FIG. 3 shows the printed circuit board 4 provided on the detector main body 3 and the terminal block 1 provided on the base member 2.
5, the contact fitting 21 is attached upward from the back surface of the printed circuit board 4 provided on the detector body 3, and the terminal block 1 is assembled in the illustrated state.
The contact fittings 21 of the printed circuit board 4 are crimped onto the side surfaces of the terminal fittings 22 of No. 5 to enable electrical connection.

Next, the operation of the above embodiment will be explained.

FIG. 6 schematically shows the basic structure of the warning direction adjustment mechanism according to the present invention shown in FIG.

In FIG. 6, the detector is installed on the ceiling surface 25 by fitting the mount 1 into the through hole of the base member 2 from below, and then inserting the mount 1 into the through-hole of the mount 1 from the bottom. A screw 24 is fitted into the mounting screw hole 12 and fixed to the ceiling surface 25. In this fixed state, the base member 2 is supported by the flange 10 of the mounting base 1 so as to be rotatable in 360° directions.

Subsequently, the detector main body 3 is attached to the lower side of the base member 2 which is rotatably supported by the mount 1. In this case, since the base member 2 is provided with the engagement claw 19, the base member 2 and the detector main body 3 are connected by fitting the engagement receiving portion 26 of the detector main body 3 into the engagement claw 19. Link.

Subsequently, the warning direction determined by the pointing direction of the sensor unit 8 attached to the sensor mounting portion 6 of the detector main body 3 is rotated and adjusted so as to become a predetermined warning direction. Once this rotational position adjustment in the warning direction is completed, insert the screw 16 from the detector body 3 into the screw hole 31 of the base member 2 as shown in the figure and tighten it. By tightening, the base member 2 and the detector main body 3 are sandwiched. At this time, as shown in FIGS. 4 and 5, since a fixing protrusion 18 is formed on the surface of the detector main body 3 facing the flange 10, the fixing protrusion 18 is formed on the surface of the flange 10. crimped and flange 1
The movement of the base member 2 and the detector main body 3 in the clamped and fixed state of 0 is restricted.

Furthermore, as is clear from FIG. 2, when the mounting base 1 is fitted into the through hole 14 of the base member 2, the locking claw 1 formed on the side surface of the detachment prevention part 11 of the mounting base 1
3 comes out to the upper surface of the corresponding through hole 14 and prevents the mounting base 1 itself from coming off. The lower end of the locking pawl 13 is located on the upper surface of the through hole 14, and the flange portion 10 is located on the lower surface of the through hole 14 to enable relative rotation between the two, and an obstruction occurs in the relative rotation between the two at the fitted position. There isn't.

FIG. 7 is an explanatory diagram showing another embodiment of the mounting base 1 used in the warning direction adjustment mechanism of the present invention,
This embodiment is characterized in that a sawtooth-shaped fitting groove 26 is continuously provided on the lower surface of the flange 10 of the mounting base 1. As shown in FIG. 8, a triangular engagement protrusion 27 is formed on the upper surface of the detector main body 3 to fit into the engagement groove 26 of the mounting base 1. By fitting the fitting groove 26 of the base 1 and the engaging protrusion 27 of the detector main body 3, the function of the fixing protrusion 18 shown in FIGS. 4 and 5 is realized.

(Effects of the invention) As explained above, according to the invention, by fixing the mounting base to the ceiling surface, wall surface, etc. with screws, the base member is rotatably supported relative to the mounting base. By attaching the detector body to the lower side, the warning direction can be freely adjusted in 360° when installed on the ceiling, and the position of the warning direction can be adjusted when installing a hot-wire type detector, and after installation. It is extremely easy to change the warning direction.

In addition, when the base member and the detector body are rotatable relative to the mounting base, and the detector body is fixed to the base member with screws, the flange of the mounting base located between them is pinched, and the base member is attached to the base member. The detector body can be securely fixed, and since a fixing protrusion is formed on the top surface of the detector body and is pressed against the lower surface of the flange of the mount, it can be used as a base member for screwing onto the mount. Movement of the container body can be more reliably prevented.

[Brief explanation of drawings]

Fig. 1 is an exploded view showing an embodiment of the present invention, Fig. 2 is an explanatory drawing showing the mounting base and base member of Fig. 1 in detail, and Fig. 3 shows how it is fixed to the ceiling. The cross-sectional view shown in Figure 4 is A in Figure 3.
Fig. 5 is an explanatory diagram showing the fixing protrusion provided on the plane of the detector body, Fig. 6 is a schematic diagram showing the mechanism principle of the present invention, and Fig. 7 is an illustration of other parts of the mounting base. An explanatory diagram showing an embodiment, FIG. 8 is a plan view of the detector main body combined with the mount shown in FIG. 7, FIG. 9 is an explanatory diagram showing a conventional fixed base, and FIG. 10 is a diagram showing the conventional structure. FIG. DESCRIPTION OF SYMBOLS 1...Mounting stand, 2...Base member, 3...Detector main body, 4...Printed circuit board, 5...Circuit protection board, 6...Sensor mounting part, 7...Detection element, 8...
...Sensor unit, 9...Wiring extraction hole, 10...
...Flame part, 11... Removal prevention part, 12... Mounting screw hole, 13... Locking claw, 14... Through hole, 15...
Terminal block, 16, 24...screw, 18...fixing protrusion, 19...engaging claw, 20...engaging receiver, 21...
...Contact fitting, 22...Terminal fitting, 26...Engagement groove, 27...Engagement protrusion, 30...Cover.

Claims (1)

[Claims for Utility Model Registration] A mounting base fixed to a ceiling surface with screws, a base member rotatably located between the mounting base and the ceiling surface, and the base member with the mounting base interposed therebetween. The mounting base is made of a cylindrical member, and the cylindrical member has a wiring extraction hole in the center inside thereof, and a flange on the lower edge of the outer periphery to prevent the base member from slipping out. further forming a slip-off preventing portion located radially inside the base member from the circumferential surface of the cylindrical member to prevent it from coming off, and forming a mounting screw hole in the flat surface of the slip-off preventing portion; The base member is provided with a locking pawl on the side surface for regulating the outward slippage, and the base member is a disc-shaped member having a through hole formed in the center corresponding to the planar shape of the mounting base excluding the flange, and the base member an engagement claw that engages with the detector main body on the outer periphery of the detection main body, and the detection main body is pressed against the flange surface of the mounting base when the detection main body is screwed and fixed to the base member with the mounting base interposed therebetween. 1. A warning direction adjustment mechanism for a hot-wire detector, characterized in that it has a fixing protrusion on its upper surface, and an engagement receiving part that engages an engagement claw of the base member.