JP2594508Y2 - Cover mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for incorporating a cover into a main body of a device, and more particularly to a photoelectric separation type smoke detector in which a transmitter and a receiver for smoke detection are separated from each other. It relates to a suitable cover incorporating device.

[0002]

2. Description of the Related Art As an example of a cover incorporating device of this type, for example, in an infrared detector for detecting theft in a security system, the cover is fixed to a main body by screws because it is installed at a position where a person passes. In addition, it is desirable that the screwing is configured so that it cannot be easily removed by ordinary people for safety.

As another example, as shown in FIG. 11, a light transmitter 20 emits near-infrared light, and the near-infrared light attenuated by smoke is received by a light receiver 30 to generate a fire signal or the like. 2. Description of the Related Art There is known a photoelectric separation type smoke detector which outputs a signal. This light transmitter 20
And the light receiver 30 are installed on a ceiling as shown in FIG. 12A, or installed on a side wall or the like near the ceiling as shown in FIG. 12B to detect smoke generated by a fire.
Similarly, the transmitter and receiver covers are usually fixed to the body by screwing, but in this case they are installed at a high place so that the screwing can be easily removed by the operator. It is desirable to do.

[0004]

However, in such a photoelectric separation type smoke detector, smoke cannot be detected normally unless the optical axes of the light transmitter 20 and the light receiver 30 match. It is necessary to adjust the optical axis at the time of installation or maintenance so that near-infrared light is invisible, so that a light-emitting element in the visible light region is provided in both the transmitter 20 and the receiver 30. By visually observing the light emitting element of the light receiver 30 from the light transmitter 20 side, the optical axis of the light receiver 30 is manually adjusted using a driver or the like, and the light emitting element of the light transmitter 20 is similarly adjusted from the light receiver 30 side. The visual axis is used to manually adjust the optical axis of the light transmitter 20 using a driver or the like. Also,
In this optical axis adjustment, the light transmitter 20 and the light receiver 30 are manually adjusted using a driver or the like while detecting the light reception level on the light receiver 30 side with an ammeter or the like.

However, in the structure in which the cover is screwed to the main body, as shown in FIG. 12 (b), the worker must carry tools such as a driver and an ammeter at a high place. There is a problem that the workability is poor and the operation is dangerous. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a cover incorporating device capable of improving workability in a high installation place.

[0006]

In order to achieve the above object, the present invention is directed to an assembling device for a cover which can be horizontally attached to and detached from a main body. A support means for supporting the cover and the main body so as to be rotatable in the attaching / detaching direction about the locking point as an axis, and being fixed to a lower end of the main body and having a substantially long end at the tip end. A first hinge member having a circular loop formed so as to extend in a horizontal direction; and a second hinge member fixed to a lower end of the cover and having a tip engaged with the loop of the first hinge member. When the cover is incorporated into the main body, the cover is fitted to the main body by the second hinge member coming out of the loop of the first hinge member and entering the main body around the locking point at the upper end as an axis. ,cover When the cover is removed from the main body, the cover is rotated forward about the locking point of the upper end and the cover is detached from the main body, whereby the upper end is unlocked, and the cover hangs from the loop in the open state. It is characterized by the following.

In the present invention, the first and second hinge members are both formed in a wire shape, and the first hinge member has a first portion directed forward with respect to the second hinge member. And a second portion bent rearward from the first portion so as to draw the loop between the first portion and a vertical direction of the first portion at a rear end of the loop. Is bent from the second portion so that the distance of the third hinge member is slightly smaller than the thickness of the second hinge member.
Wherein the second hinge member engages a fourth portion rearwardly with respect to the first hinge member and first and second portions forming the loop. And a fifth portion bent from the fourth member in the width direction of the cover and the main body, and a sixth portion bent forward from the fifth portion.

[0008]

According to the present invention, with the above construction, in a device for assembling a cover which can be attached to and detached from the main body in a horizontal direction, when the cover is incorporated into the main body, the second hinge member is connected to the first hinge member with the upper end locking point as an axis. The cover is fitted to the main body by entering into the main body, which comes off behind the loop of the hinge member and enters the main body. When the cover is removed from the main body, the cover pivots forward about the locking point at the upper end as an axis. Then, when the cover comes off the main body, the locking of the upper end is released, and the cover hangs from the loop in the open state.

Therefore, it is possible to prevent the cover by the first and second hinge members from dropping, so that it is not troublesome to place the cover in a high installation place, and the workability can be improved. The present invention also comprises bending the wire-like elastic member to form the first and second wires.
Therefore, the workability in a high installation place can be improved with an inexpensive configuration.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an apparatus for assembling a cover of a photoelectric separation type smoke detector as an embodiment of the present invention. The cover 1 is formed so as to fit in the horizontal direction with respect to the main body 2, and the upper end of the cover 1 and the upper end of the main body 2 are respectively provided with a locking portion 1-1 and a locking metal fitting 2-1 as a first shaft. Is provided. The locking fitting 2-1 is formed of a plate-like elastic material such that the tip protrudes forward and the tip faces upward, and a tapered locking portion 1-1 is provided at the tip of the locking fitting 2-1. On the other hand, when it is pushed from the top down, it is pushed into the back, and the latch 2-1
Gets over the locking portion 1-1 and is locked in the horizontal direction, and the cover 1 is fitted to the main body 2 so that it cannot be disengaged only by moving in the forward direction.

Then, the cover 1 is attached to the main body 2 as shown in FIG.
4 can be opened and closed in the vertical direction with the lower end as a second axis by means of hinges 12 and 13 as shown in detail in FIG. As shown in FIG. 2, the hinges 12, 13 are formed of a longitudinal elastic material, specifically, a wire, and each of the widths 12
The distances L2 and L1 between the a and the 13a are formed to be long enough to be accommodated in the cover 1 and the main body 2, respectively, and are fixed to the cover 1 and the main body 2 by the fixing bracket 40, respectively.

The hinge 13 on the main body 2 side will be described with the cover 1 side as the front direction. First, both ends are bent downward at right angles from the width portion 13a so as to be fixed by the fixing bracket 40, and the bent portion is formed. 13b is further bent at a right angle to the front direction, that is, the direction of the cover 1. Then, the part 1 ahead of this part 13c
3d is bent backward so as to draw a loop L with the portion 13c, and the vertical distance between the boundary of the last portion 13e ahead and the portion 13c thereabove is slightly smaller than the thickness of the wire. It is bent like so.

In this case, the portion 1 which is bent forward
The distance L3 of 3c is formed so as to protrude slightly forward from the main body 2 as shown in FIG. 1, and furthermore, the loop diameter formed by the portion 13c bent forward and the portion 13d below it, The distance from the distal end of the portion 13e is formed so that the hinge 12 on the other side can freely move in the front-rear direction and does not come off.

On the other hand, the hinge 12 on the removable cover 1 side
When the fixed state as shown in FIG. 1 is described as a front direction, first, both ends are similarly bent downward at a right angle from the width portion 12a so as to be fixed by the fixing bracket 40,
The end of the bent portion 12b is bent rearward, that is, in the direction of the hinge 13 on the main body 2 side. Then, the front portion 12d is bent outward in the width direction from the rearwardly bent portion 12c so that the hinge 12 can be locked to the loop L of the hinge 13 on the main body 2 side, and the front portion 12e is further raised upward. Folded into the last part 12
f is bent forward. Note that the portion 12d bent outward may be bent inward in the width direction instead.

In such a configuration, when the cover 1 shown in FIG. 3 is open, the loop 1 of the hinge 13 on the main body 2 side, specifically, the portion 1 bent forward.
3c and a portion 13d bent rearward, a portion 12d bent outside the hinge 12 on the cover 1 side.
Is suspended in the vertical direction. In this case, the cover 1 is freely movable in the vertical direction within the range of the loop diameter, and the cover 1 is bent outside the hinge 12.
It is freely movable in the width direction within a range of 2d,
Since the last portion 12f of the hinge 12 on the cover 1 side is bent, the moving range in the width direction is limited, and therefore, the hinge 12 can be prevented from easily coming off in the width direction.

The cover 1 is moved from the open state to the main body 2.
When the cover 1 is incorporated, the cover 1 can be freely moved in the vertical direction within the range of the loop diameter. Is maintained substantially horizontal with respect to the main body 2. Then, when pushed into the main body 2 side with the locking point at the upper end as an axis, as shown in FIG. 4, the part 12 d bent outside the hinge 12 on the cover 1 side comes off the loop L on the main body 2 side, and Move to the last part 13e. Accordingly, in this state, the cover 1 and the main body 2 are fitted with each other.
Expected.

When the cover 1 is to be removed from the assembled state shown in FIG. 4, when the lower end is pulled forward around the above-mentioned locking point of the upper end, a portion 12d bent outward of the hinge 12 on the cover 1 side is formed. Is the loop L on the main body 2 side
And the upper end side locking portion 1-1 and locking metal fitting 2-1.
Can be released. Therefore, cover 1
Is in an open state as shown in FIG. 3, and the cover 1 does not fall as shown in FIG.

Therefore, according to the above embodiment, since the cover 1 can be prevented from dropping by the hinges 12 and 13 as shown in detail in FIG. 2, workability in a high installation place can be improved. . Further, the cover 1 can be easily assembled and detached by the hinges 12 and 13 on the lower end side, the locking portion 1-1 on the upper end side, and the locking metal fitting 2-1.

FIG. 5 is an exploded perspective view showing a photoelectric separation type smoke detector to which the cover incorporating device of this embodiment is applied. This device shows one of the light transmitter 20 and the light receiver 30 of the photoelectric separation type smoke sensor shown in FIG. 11, and includes a light emitting element and a light receiving element of near infrared light for smoke detection and a related circuit. Except for this, they have almost the same configuration. The light transmitter 20 and the light receiver 30 are installed on a side wall near the ceiling as shown in FIG. 12B, and are installed at a higher place in a large space such as a dome. The housing shown in FIG. 5 includes a vertically long cover 1 and a main body 2 as shown in FIGS.
The optical axis adjustment mechanism of the lens holder 4 is accommodated therein as shown in an exploded manner.

The mounting plate 3 is screwed to the side wall near the ceiling, and the main body 2 is attached to the locking piece 3-1 of the mounting plate 3.
Is locked. The cover 1 is provided with a member that transmits near-infrared light but cuts visible light, for example, a window 1-2 made of polycarbonate. Next, the mechanism housed in the main body 2 will be described in detail. First, the base 11 of the optical axis adjustment mechanism is formed of a metal fitting whose side cross section is L-shaped.
It is fixed to the main body 2 in the horizontal direction. Below the base 11, a printed circuit board 14 on which circuit components for light transmission or light reception are mounted is housed. Especially the printed circuit board 1 of the receiver
4 also includes six LEDs 14-1 to 14-1 as shown in FIG.
14-6 are arranged along the left-right direction.

The LEDs 14-1 to 14-6 include three yellow LEDs 14-1 to 14-3, one green LED 14-4, and two red LEDs 14-5 from the left.
14-6, and is controlled so that the LED at a position proportional to the light receiving level is turned on. Therefore, the LEDs 14-1 to 14-6 constitute a light receiving level meter. In this embodiment, the optical axis and the amplifier are adjusted so that the green LED 14-4 lights up to have the optimum light receiving level. The gain and the like are adjusted. The printed circuit board 14 is covered with a transparent circuit cover 15.

In the case of a light transmitter, the light emitting circuit 21 shown in FIG.
The near-infrared light emitting element 22 and the lens 23 are provided in the lens holder 4, and in the case of a light receiver, the lens 31 and the near-infrared light receiving element 32 are provided in the lens holder 4,
The amplification circuit 33, the signal conversion circuit 34, and the control circuit 35 are mounted on the printed circuit board 14. Then, the L
The lighting of the EDs 14-1 to 14-6 is controlled by the control circuit 35.

The base 11 has an axial hole 11-1 in which an adjusting screw 8-1 for adjusting the horizontal direction of the lens holder 4 is fitted in the optical axis direction, and the lens holder 4 and its supporting member 7 in the horizontal direction. Shaft hole 11-2 for rotatably supporting the shaft
And a locking hole 11-3 for locking one end of a coil spring 9 for preventing backlash in the horizontal direction of the lens holder 4 and the like.

A separator 10 is attached to a shaft hole 11-2 of the base 11 by screws 7-2.
Numeral 0 is configured to fit vertically to the flange portions 11-4 and 11-5 of the base 11 so as not to rotate in the horizontal direction with respect to each other. The separator 10 is formed with a hole 10-1 through which one end of the coil spring 9 passes, a concave portion 10-2 for accommodating the coil spring 9 body, a shaft hole 10-3, and the like.

The lens holder 4 is supported rotatably in the vertical direction with respect to a support member 7 having a U-shaped front section, and the support member 7 is mounted on the shaft of the separator 10 with the mounting screw 7-2 as a shaft. It is attached to the shaft hole 11-2 of the base 11 via the hole 10-3 so as to be rotatable in the horizontal direction. First, a description will be given of a horizontal rotation mechanism.
1 is formed in the receiving screw 6-1 so that the horizontal adjusting screw 8-1 is screwed in the optical axis direction. Are formed. Therefore, when the adjustment screw 8-1 rotates, the support member 7 rotates in the horizontal direction around the mounting screw 7-2.

The support member 7 also has a locking hole 7-3 for locking the other end of the coil spring 9 in the vertical direction, and an adjusting screw 8-2 for adjusting the vertical direction of the lens holder 4. A hole 7-4 that fits in the optical axis direction is formed. Further, the lens holder 4
It is supported so as to be able to rotate in the vertical direction about 5, 7-6.

A spring 5 for preventing the vertical play of the lens holder 4 is attached to the rotation shaft of the lens holder 4, and one end of the spring 5 has a locking hole 7-of the support member 7. 7, and the other end is locked to a locking piece 4-5 of the lens holder 4 as shown in FIG. A receiving screw 6-2 is attached to the side surface of the lens holder 4 at a position deviated from the rotation axis in the left-right direction. The receiving screw 6-2 is attached to the receiving screw 6-2 similarly to the receiving screw 6-1. The screw thread is formed such that the vertical adjustment screw 8-2 is screwed in the optical axis direction. Therefore, when the adjustment screw 8-2 rotates, the lens holder 4 rotates in a direction perpendicular to the support member 7.

That is, since the adjustment screw 8-1 for the horizontal direction and the adjustment screw 8-2 for the vertical direction are both mounted in the optical axis direction, as shown in FIG.
Each of the knobs 8a and 8b of 8-2 faces the front, and can be easily operated at a high place. In the example shown in FIGS. 6 and 7, when the knob 8a of the adjustment screw 8-1 for the horizontal direction rotates in the counterclockwise direction A, the lens holder 4 rotates to the left, and the knob 8a rotates clockwise. When the lens holder 4 rotates in the direction B, the lens holder 4 rotates rightward. When the knob 8b of the vertical adjustment screw 8-2 rotates in the counterclockwise direction C, the lens holder 4 rotates downward, and when the knob 8b rotates in the clockwise direction D, the lens holder 4 rotates. Rotate upward.

Next, the structure of the lens holder 4 will be described in detail with reference to FIGS. In the lens holder 4,
An aiming hole 4-2 for observing diagonally from the front is provided at the upper right of the front, and an aiming hole 4-3 is provided at the upper left of the front so as to be parallel to the optical axis direction. Further, a reflection mirror 4-1 for obliquely reflecting the visual field seen from the aiming hole 4-3 so as to be seen through the aiming hole 4-2 is attached.

Aiming holes 4-2, 4-3, reflection mirror 4-1
The aiming means is constituted from. The aiming means is provided at least in the light transmitter. Reference numeral 4-4 denotes an opening for locking the above-described receiving screw 6-2 for the vertical adjustment screw 8-2. Therefore, according to this application example,
When the worker removes the cover 1 from the main body 2, the cover 1 is suspended, and when the worker
Each of the knobs 8-1 and 8-2 of the adjustment screws 8-1 and 8-2 attached to the front while confirming the light receiving level with the color of light of ~ 14-6.
Since the optical axis can be adjusted while rotating a and 8b, there is no problem in placing the cover 1 at a high place.
The optical axis can be adjusted by a simple operation without possessing tools such as a driver and an ammeter.

[0031]

[Effects of the Invention] As described above, according to the present invention,
The first and second hinge members can prevent the cover from dropping, so that there is no trouble in placing the cover at a high installation location, and the workability can be improved. According to the present invention, the first and second hinge members can be formed by bending the wire-like elastic member. Therefore, the workability in a high installation place can be improved with an inexpensive structure.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a cover assembling device according to the present invention.

FIG. 2 is a perspective view showing the structure of the hinge of FIG. 1 in detail.

FIG. 3 is a side sectional view showing an open state of a cover in the cover assembling device of FIG. 1;

FIG. 4 is a side sectional view showing a state where the cover is assembled in the cover assembling apparatus of FIG. 1;

FIG. 5 is an exploded perspective view showing a photoelectric separation type smoke detector to which the embodiment is applied.

FIG. 6 is a front view showing an optical axis adjusting mechanism of the photoelectric separation type smoke detector of FIG. 5;

FIG. 7 is a right side view showing the optical axis adjusting mechanism of FIG. 6;

FIG. 8 is a front view showing the lens holder of FIG. 5;

FIG. 9 is a right side view showing the lens holder of FIG. 8;

FIG. 10 is a rear view showing the lens holder of FIG. 8;

FIG. 11 is a block diagram showing a light transmitter and a light receiver of the photoelectric separation type smoke detector.

FIG. 12 is an explanatory diagram showing an installation example of a photoelectric separation type smoke detector.

[Explanation of symbols]

L: Loop 1: Cover 2: Main body 3: Mounting plate 3-1: Locking piece 4: Lens holder 4-1: Reflection mirror 4-2, 4-3: Aiming hole 4-4, 7-1, 7- 3,7-4,10-1,10-
3.11-1 to 11-3: Hole 5, 9: Spring 6-1, 6-2: Receiving screw 7: Support member 7-2, 7-5, 7-6: Screw 8-1, 8-2 : Adjusting screw 8a, 8b: Knob 10: Separator 11: Base 12, 13: Hinge 12a to 12f, 13a to 13e: Bending portion of hinge 14: Printed circuit board 14-1 to 14-6: LED 15: Circuit cover 20: Transmitter 21: Light emitting circuit 22: Light emitting element 23, 31: Lens 30: Light receiver 32: Light receiving element 33: Amplifier circuit 34: Signal conversion circuit 35: Control circuit 40: Fixture

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-130581 (JP, A) JP-A-57-144095 (JP, U) JP-A-64-24741 (JP, U) JP-A-63-47491 91450 (JP, U) JP-A 2-161279 (JP, U) JP-A 4-82789 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB name) G08B 17/103 B65D 43 / 16 B65D 51/04

Claims (2)

(57) [Scope of request for utility model registration] An apparatus for assembling a cover which is detachable in a horizontal direction with respect to a main body, wherein the cover and the upper end of the main body can be locked in a horizontal direction and can be unlocked in a vertical direction. And a supporting means for supporting the main body so as to be rotatable in the attaching / detaching direction with the locking point as an axis; and a first part fixed to a lower end of the main body and having a substantially oval loop formed at a tip end so as to extend in a horizontal direction. A hinge member fixed to a lower end of the cover, and a second hinge member having a tip engaged with a loop of the first hinge member. When the second hinge member is disengaged from the loop of the first hinge member and enters the main body as a shaft, the cover is fitted to the main body, and when the cover is removed from the main body, the cover is engaged with the upper end. point The cover assembling device wherein the upper end is unlocked when the cover is disengaged from the main body by rotating the cover forward from the main body, and the cover is hung from the loop in the open state. 2. The first and second hinge members are both formed of a wire-like elastic material, and the first hinge member has a first portion directed forward with respect to the second hinge member. And a second portion bent rearward from the first portion so as to draw the loop between the first portion and a vertical direction of the first portion at a rear end of the loop. A third portion bent from the second portion so that the distance of the second hinge member is slightly smaller than the thickness of the second hinge member. A fourth portion extending rearward, a fifth portion bent in the width direction of the cover and the main body from the fourth member to engage with the first and second portions forming the loop, A sixth portion bent forward from the fifth portion Cover embedded device according to claim 1, characterized in that it has.