JPH06314386A - Dustproof cover and detaching jig - Google Patents

Abstract

PURPOSE:To prevent a clog and a decrease in detection sensitivity and to provide the function of a buffer material while a sensor is put in a box. CONSTITUTION:The dustproof cover has a recessed part 15 which covers plural smoke intakes 13 formed in the flank of a sensor cover 12 almost in a hermetical state to prevent dust from entering, plural engagement projections 17 which are formed on the flank of the recessed part and engage the smoke intakes 13 so that they are fitted to the sensor cover 12, and an engagement part for detachment which can detach the recessed part 15 with the detaching jig 39 while the recessed part 15 is fitted to the sensor cover 12; and the detaching jig 39 consists of the nearly U-shaped engagement part consisting of 1st engagement parts 32A and 32B and a 2nd engagement part 34 which can be engaged with the engagement part for detachment of the dustproof cover 11 and a rod member 38 where the engagement part is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust cover used in a smoke detector and a removing jig for removing the dust cover.

[0002]

2. Description of the Related Art Conventionally, as a dustproof cover of this kind, a smoke detector is attached to a smoke detector, and a smoke inlet provided in the smoke detector cover is covered in a substantially sealed state so as to prevent intrusion of dust and dirt. It is known to have been made. The dust cover is attached to the smoke detector, is housed in a storage box together with the smoke detector, and is transported to the construction site.

At the construction site, the smoke detector is attached to the ceiling with the dust cover attached to the smoke detector. During the installation work to attach the smoke detector to the ceiling, dust and particles are likely to be generated, and the dust and dirt enter the smoke inlet of the smoke detector, clogging the insect screen, and preventing smoke from entering the smoke detector. If it penetrates inside, the detection sensitivity will change and the detection function will decline.

In order to prevent such a problem, a dust-proof cover is attached to the smoke detector during construction to prevent dust from entering the smoke inlet. When the construction is completed, the dustproof cover is removed, but when removing it, the dustproof cover was pulled and removed.

[0005]

However, in such a conventional dustproof cover and removal jig as described above,
When the construction is completed, when the dustproof cover is removed, the dustproof cover is pulled to remove the dustproof cover. Therefore, the dust and dust adhering to the dustproof cover fly off when the dustproof cover is removed, and enter the smoke inlet. As a result, there is a problem that the insect screen is clogged, the detection sensitivity is changed, and the detection function is deteriorated.

The present invention has been made in view of the above-mentioned conventional problems, and prevents dust from entering the smoke inlet at the time of removal, thereby causing the occurrence of clogging. The purpose is to prevent a decrease in detection sensitivity. Another object is to have a function as a cushioning material in a state where the sensor is housed in a box.

[0007]

According to the present invention, a plurality of smoke inlets formed on the side surface of a sensor cover are covered in a substantially airtight manner to prevent dust and dirt from entering, and a side surface of the recess is formed. A plurality of engaging projections that engage with the smoke inlet so as to be attached to the sensor cover, and a detaching engaging portion that can be detached by a detaching jig in a state where the recesses are attached to the sensor cover. It is characterized by that.

Further, the present invention is characterized in that the disengagement engaging portion is a cross-shaped groove formed on the back surface side of the bottom surface of the recess. Further, the present invention is characterized in that the disengagement engaging portion has a function as a cushioning material in a box housed state. Further, the present invention is characterized in that the disengagement engaging portion is a plurality of notches formed in a circumferential protrusion provided on the back surface side of the recess.

Further, according to the present invention, a substantially U-shaped engaging portion composed of a first engaging portion and a second engaging portion which can be engaged with the detaching engaging portion, and the engaging portion are fixed. It is characterized by being constituted by a rod-shaped member. Further, the present invention is characterized in that the first engaging portion is engageable with a notch of the dustproof cover.

Further, the present invention is characterized in that the second engaging portion is engageable with the groove of the dustproof cover.

[0011]

According to the dustproof cover of the present invention having such a structure, since the plurality of smoke inlets formed on the side surface of the sensor cover are covered with the recesses in a substantially sealed manner, the sensor cover is installed during the installation work. It is possible to prevent dust and dirt from entering the smoke inlet. Also, when the sensor installation work is completed,
The removal jig is engaged with the removal engagement part, and it is rotated to remove the dustproof cover, so dust and dirt do not fly like before, and dust and dirt are prevented from entering the smoke inlet. can do.

As a result, the insect screen is clogged,
Further, it is possible to prevent the detection sensitivity from changing and the detection function from decreasing. Further, since the disengagement engaging portion is made to have a function as a cushioning material, it serves as a cushion when the sensor is housed in the box, and the impact can be softened. As a result, damage to the sensor can be prevented in advance.

Further, since the removing jig is provided with the first engaging portion and the second engaging portion which can be engaged with the detaching engaging portion of the dustproof cover, even if there are plural kinds of dustproof covers. , One removal jig can be used.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 are views showing an embodiment of the present invention. FIG. 1 is an exploded perspective view showing the whole of an embodiment of the present invention. In FIG. 1, 1 is an exposure base, 2 is a sensor body, and the exposure base 1 and the sensor body 2 together constitute an exposure type smoke sensor 3.

Reference numeral 4 is a ceiling on which the smoke detector 3 is mounted, and a mounting hole 5 is formed in the ceiling 4. A long plate-shaped mounting member 6 is fixed to the back side of the ceiling 4, and a plurality of screw holes 7A and 7B are formed in the mounting member 6. Exposure base 1
Is attached to the ceiling 4 so as to be exposed from the ceiling 4. The exposed base 1 is formed with a pair of screw holes 8A and 8B, and a fitting fitting 9 for fitting the sensor body 2 therein.
A and 9B are fixed.

The exposed base 1 is attached to the ceiling 4 by the mounting bracket 6 by inserting and screwing the screws 10A and 10B into the screw holes 8A and 8B of the exposed base 1 and the screw holes 7A and 7B of the mounting bracket 6, respectively. The sensor main body 2 is attached to the exposure base 1 by fitting the fitting metal fittings of the sensor body 2 into the fitting metal fittings 9A and 9B of the exposure base 1. Thus, the smoke detector 3 is attached to the ceiling 4.

When the smoke detector 3 is attached to the ceiling 4, the smoke detector 3 is attached to the ceiling 4 with the dust-proof cover 11 made of a transparent plastic thin plate attached to the detector body 2. Since dust or dust is likely to be generated during the installation work, the dust cover 11 covers the smoke inlet 13 formed on the side surface of the sensor cover 12 of the sensor body 2 in a substantially sealed state, so that dust or smoke Intrusion into the inflow port 13 is prevented.

On the other hand, as shown in FIG. 2, the smoke sensor 3 is attached to the storage box 1 with the dust cover 11 attached.
It is stored in 4. In this box storage state, the smoke sensor 13 is transported to the site of installation work, and the installation work is performed there. Therefore, the dust cover 11 is made to have a function as a cushioning material for softening the shock when the smoke sensor 3 is housed in the box.

Referring again to FIG. 1, 15 is a dustproof cover 11
The recess 15 is formed in a substantially bowl shape.
The sensor cover 12 is housed in. That is, the concave portion 1
5 covers the smoke inlet 13 formed in the sensor cover 12 in a substantially sealed state. This prevents dust and dirt generated during the installation work from entering the smoke inlet 13.

A plurality of spherical engaging projections 17 are formed on the inclined wall 16 of the recess 15 in the circumferential direction. The engagement protrusion 17 is adapted to engage with the smoke inlet 13, and the dustproof cover 1
1 is attached to the smoke sensor 3 by the engagement protrusion 17. The bottom surface of the recess 15 is formed to be substantially flat, and the bottom surface of the recess 15
Are formed. The concavo-convex portion 18 has a function as a cushioning material that relieves shock when the smoke sensor 3 is housed in the box and the convex portion is crushed.

A peripheral edge 19 is formed on the outer periphery of the concave portion 15,
A peripheral groove 20 is formed on the outer periphery of the peripheral edge 19. Circumferential groove 2
A plurality of protrusions 21 forming a notch as a later-described engaging portion for removal are formed in the circumferential direction 0. A thin plate-shaped outer extending portion 22 is formed outside the circumferential groove 20, and notches 23 are formed at four corners of the outer extending portion 22.

Next, the back side of the dustproof cover 11 will be described with reference to FIG. In FIG. 3, reference numeral 24 denotes a convex portion corresponding to the concave portion 15, and the concave and convex portion 18 is provided on the lower surface of the convex portion 24.
The convex and concave portions 25 corresponding to are formed. Also, the convex portion 2
A slant wall 26 corresponding to the slant wall 16 is formed in the slant wall 4, and a spherical concave groove 27 corresponding to the engaging protrusion 17 is formed in the slant wall 26.
Are formed.

A peripheral groove 28 corresponding to the peripheral edge 19 is formed on the outer periphery of the convex portion 24, and the peripheral groove 2 is formed on the outer periphery of the peripheral groove 28.
A peripheral protrusion 29 corresponding to 0 is formed. Circumferential protrusion 29
A plurality of notches 30 corresponding to the protrusions 25 are formed in the. The notch 30 constitutes an engaging portion for removing the dustproof cover 11. An outer extending portion 31 corresponding to the outer extending portion 22 is formed on the outer side of the circumferential protrusion 29.

Next, the removing jig will be described with reference to FIGS. 1 and 4. In FIGS. 1 and 4, 32
Reference numerals A and 32B are first engaging portions that engage with the notches 30 as the detaching engaging portions of the dust-proof cover 11, and step portions 33A and 33B are continuous with these first engaging portions 32A and 32B. The second engaging portion 34 is integrally formed between the step portions 33A and 33B.

The second engaging portion 34 has a flat surface 35, and in this embodiment, is formed so as to be able to abut the convex and concave portions 25. These first engaging portions 32A and 32B, the step portion 33
The A, 33B and the second engagement portion 34 constitute a substantially U-shaped engagement portion 36 as a whole. A mounting member 37 is fixed to the central lower surface of the second engaging portion 34, and the engaging portion 36 is mounted on the bar 38 of a rod-shaped member via the mounting member 37. The removal jig 39 for removing the dust-proof cover 11 as a whole by the engaging portion 36, the attachment member 37 and the bar 38.
Are configured. The mounting member 37 is composed of a cylindrical large-diameter portion 40 and a small-diameter portion 41 provided on the lower surface of the large-diameter portion 40. In the small-diameter portion 41, a pair of pins 42A and 42B are inserted and a screw hole 43 is formed. Has been done.

The bar 38 has an insertion hole 44 into which the small diameter portion 41 is inserted, a pair of notches 45A and 45B into which the pair of pins 42A and 42B are inserted, and a screw hole 46 in the outer peripheral portion. . Pass the screw 47 through the screw holes 46 and 43,
The engagement portion 36 is fixed to the bar 38 via the attachment member 37 by screwing. Next, the operation will be described.

As shown in FIG. 2, the smoke detector 3 is housed in the storage box 14 with the dust cover 11 attached, and in this box storage state, the smoke sensor 3 is transported to the site of installation work. During the transportation, the dustproof cover 11 functions as a cushioning material. That is, the concave-convex portion 18 formed in the concave portion 15 of the dustproof cover 11 serves as a cushion to soften the impact. This prevents damage to the smoke sensor 3 during transportation.

When attaching the smoke detector 3 to the ceiling 4,
This is performed with the dust sensor 11 attached to the smoke sensor 3. That is, the screws 10A and 10B are inserted into and screwed into the screw holes 8A and 8B of the exposed base 1 and the screw holes 7A and 7B of the mounting bracket 6, respectively, so that the exposed base 1 is attached to the ceiling 4 via the attachment member 6.

Next, the fittings 9A, 9B of the exposed base 1
The sensor body 2 is fixed to the exposure base 1 by fitting the fitting metal fitting of the sensor body 2 to. Thus, the smoke sensor 3 is attached to the ceiling 4 with the dustproof cover 11 attached. The dust cover 11 is attached to the smoke detector 3 by mounting the smoke inlet 13 formed on the detector cover 12
This is performed by fitting the engagement protrusion 17 of the dust cover 11 into the.

As described above, during the installation work, since the dustproof cover 11 is attached so as to cover the smoke inlet 13 in a substantially sealed state, it is possible to prevent dust from entering the smoke inlet 13. When the installation work is completed, the dustproof cover 11 is removed using the removal jig 39. That is, as shown in FIG. 4, the notch 30 on the back side of the dustproof cover 11 has the first engaging portion 32A of the removal jig 39,
32B is engaged, and the projections and depressions 25 on the back side of the dustproof cover 11
The second engaging portion 34 of the removal jig 39 is brought into contact with the above, the removal jig 39 is rotated, and the dust cover 11 is removed.

As in the conventional case, the dust-proof cover is hooked with a removal jig and removed by pulling, but the removal jig 39 is fitted into the notch 30 of the dust-cover 11 and rotated to remove it. Cover 11
In addition, dust and dirt that have adhered during construction do not fly, and it is possible to reliably prevent dust and dirt from entering the smoke inlet 13.
As a result, the insect screen is not clogged, the detection sensitivity is not changed, and the detection function is not deteriorated.

Further, since the engaging projection 17 is formed in a spherical shape, the dustproof cover 11 can be smoothly removed. Next, FIGS. 5 to 7 are views showing another embodiment of the present invention. FIG. 5 is an exploded perspective view showing the whole of another embodiment of the present invention. In FIG. 5, 51 is an embedded base, 5
Reference numeral 2 denotes a sensor main body, and the embedded base 51 and the sensor main body 52 constitute an embedded smoke detector 53 as a whole.

Reference numeral 54 is a ceiling to which the smoke sensor 53 is attached, and an attachment hole 55 is formed in the ceiling 54. Ceiling 5
A bent mounting member 56 is fixed to the back side of the connector 4, and a plurality of screw holes 57A and 57B are formed in the mounting member 56. The embedded base 51 is attached to the ceiling 54 so as to be embedded from the ceiling 54. A pair of screw holes (not shown) are formed in the embedded base 51, and a fitting 58 for fitting the sensor body 52 is fixed.

Screw holes of the embedded base 51 and the mounting bracket 5
By inserting the screws 59A and 59B into the screw holes 57A and 57B of 6 and screwing them in, the embedded base 51 is attached to the mounting bracket 5.
6 is attached to the ceiling 54. The sensor body 52 is attached to the embedded base 51 by fitting the fitting metal piece 58 of the embedded base 51 with the fitting metal piece of the sensor main body 52. Thus, the smoke sensor 53 is attached so as to be embedded in the ceiling 54.

When the smoke detector 53 is attached to the ceiling 54, the smoke detector 53 is attached to the ceiling 54 with the dust cover 60 attached to the detector body 52. Since dust is likely to be generated during installation work, the dust cover 6
0 covers the smoke inlet 62 formed on the side surface of the sensor cover 61 of the sensor main body 52 in a substantially sealed state to prevent dust and dirt from entering the smoke inlet 62.

Reference numeral 63 denotes a concave portion of the dustproof cover 60. The concave portion 63 is formed in a substantially bowl shape, and the concave portion 63 has a sensor cover 6 formed therein.
1 is stored. That is, the concave portion 63 is the sensor cover 6
The smoke inlet 62 formed in 1 is covered in a substantially sealed state. As a result, dust and dust smoke inlets 62 generated during installation work
To prevent intrusion.

On the inclined wall 64 of the recess 63, a plurality of spherical engagement projections 65 are formed in the circumferential direction. The engagement protrusion 65 is adapted to engage with the smoke inlet 62, and the dust cover 6
0 is attached to the smoke sensor 53 by the engagement protrusion 65.
Four fan-shaped grooves 66 are formed on the bottom surface of the recess 63, and a cross-shaped protrusion 67 is formed by these grooves 66. When viewed from the back surface, the protruding portion 67 constitutes a cross-shaped groove as a later-described disengagement engaging portion. Also,
When the smoke sensor 53 is housed in the box, the projecting portion 67 has a function as a cushioning material and serves as a cushion to soften the impact.

A thin plate-shaped outer extending portion 68 is formed on the outer side of the recess 63, and notches 69 are formed at the four corners of the outer extending portion 68. Next, the back side of the dustproof cover 60 will be described with reference to FIG. In FIG. 6, reference numeral 70 denotes a convex portion corresponding to the concave portion 63, a convex wall 70 corresponding to the inclined wall 64 is formed on the convex portion 70, and the inclined wall 71 has a spherical shape corresponding to the engaging projection 65. Concave groove 72 is formed. In addition, the convex portion 70
A protruding portion 73 corresponding to the groove 66 is formed on the lower surface of the.

A cross-shaped groove 74 corresponding to the cross-shaped protruding portion 67 is formed on the lower surface of the convex portion 70.
The groove 74 constitutes an engaging portion for removing the dust cover 60. An outer extending portion 75 corresponding to the outer extending portion 68 is formed on the outer side of the convex portion 70. 39 is a dust cover 60
Is a removal jig for removing the
9 has the same structure as that of the above embodiment.

The second engaging portion 34 of the removing jig 39 is engageable with the cross-shaped groove 74 on the back side of the dustproof cover 60. Therefore, although there are two types of dustproof covers 11 and 60, they can be removed by one removing jig 39. Similar to the case shown in FIG. 2, the smoke sensor 53 is also stored in the storage box 14 with the dust-proof cover 60 attached to the sensor body 52, and in this box storage state, it is transported to the site of installation work. .

During this transportation, the dustproof cover 60 functions as a cushioning material. That is, the projecting portion 67 formed on the bottom surface serves as a cushion and softens the impact. When attaching the smoke detector 53 to the ceiling 54, the smoke detector 53
This is performed with the dustproof cover 60 attached. That is, the screw hole of the embedded base 51 and the screw hole 57 of the mounting bracket 56.
The embedded base 51 is attached to the ceiling 54 through the attachment member 56 by inserting the screws 59A and 59B into the A and 57B and screwing them in.

Next, the fitting main body 52 is fixed to the embedded base 51 by fitting the fitting main body 52 of the sensor base 52 into the fitting base 58 of the embedded base 51. Thus
The smoke detector 53 is attached to the ceiling 54 with the dustproof cover 60 attached. Smoke detector 53 of dust cover 60
Is attached by fitting the engaging protrusion 65 of the dustproof cover 60 into the smoke inlet 62 formed in the sensor cover 61.

As described above, during the installation work, since the dustproof cover 60 is attached so as to cover the smoke inlet 62 in a substantially sealed state, it is possible to prevent dust from entering the smoke inlet 62. When the installation work is completed,
As shown in FIG.
Remove 0. That is, the second engaging portion 35 of the removal jig 39 is inserted into the cross-shaped groove 74 on the back side of the dust cover 60.
Are engaged, the removal jig 39 is rotated, and the dustproof cover 60 is removed.

As is the case with the prior art, the dust-proof cover is hooked with a removal jig and removed by pulling it. Instead, the removal jig 39 is fitted into the groove 74 of the dust-cover 60 and rotated to remove it. The dust and dirt attached to 60 do not fly, and it is possible to reliably prevent the dust and dirt from entering the smoke inlet 62. As a result, the insect screen is clogged, or the detection sensitivity changes,
The detection function does not deteriorate.

[0045]

As described above, according to the present invention, since the detachable engaging portion which is detachable by the detaching jig in the state of being attached to the sensor is provided, the detachable engaging portion is detachable. It can be removed simply by inserting the jig and rotating it, and dust and dirt do not fly, and it is possible to reliably prevent dust and dirt from entering the smoke inlet.

As a result, the insect screen is clogged,
Further, it is possible to prevent the detection sensitivity from changing and the detection function from decreasing. Further, since the detaching engaging portion or the like is provided with a function as a cushioning material, the shock can be softened when the sensor is housed in the box. Further, since the removal jig is provided with the first engagement portion and the second engagement portion, even if there are a plurality of types of dustproof covers, they can be removed with one removal jig.

[Brief description of drawings]

FIG. 1 is an exploded perspective view according to an embodiment of the present invention.

FIG. 2 is a diagram showing a box storage state.

[Figure 3] Back view of the dustproof cover

FIG. 4 is an illustration of removal

FIG. 5 is an exploded perspective view according to another embodiment of the present invention.

[Figure 6] Back view of the dust cover

FIG. 7 is an explanatory diagram of removal

[Explanation of symbols]

 1: Exposure base 2, 52: Detector body 3, 53: Smoke detector 4, 54: Ceiling 5, 55: Mounting hole 6, 56: Mounting bracket 7A, 7B, 8A, 8B, 57A, 57B: Screw hole 9A , 9B, 58: Fittings 10A, 10B, 59A, 59B: Screws 11, 60: Dust cover 12,61: Detector cover 13, 62: Smoke inlet 14: Storage box 15, 63: Recess 16, 26, 64, 71: Inclined wall 17, 65: Engagement protrusion 18: Concavo-convex part 19: Perimeter 20, 28: Circumferential groove 21, 67, 73: Projection part 22, 31, 68, 75: Outward extension part 23, 69: Notch part 24, 70: convex part 25: convex concave part 27, 72: concave groove 29: circumferential protrusion 30: notch (engaging part for removal) 32A, 32B: first engaging part 33A, 33B: step part 34: second Engaging part 35: Flat surface 36: Engaging part 37: Mounting Material 38: Bar (bar-shaped member) 39: Removal jig 40: Large diameter part 41: Small diameter part 42A, 42B: Pin 43, 46: Screw hole 44: Insertion hole 45A, 45B: Notch 47: Screw 51: Embedded Base 66, 74: groove

Claims (7)

[Claims] 1. A recess for covering a plurality of smoke inlets formed on a side surface of a sensor cover in a substantially airtight manner to prevent dust and dirt from entering, and a recess formed on a side surface of the recess and attached to the sensor cover. And a plurality of engaging projections that engage with the smoke inlet, and a detaching engaging portion that can be detached by a detaching jig in a state where the recess is attached to the sensor cover. . 2. The dustproof cover according to claim 1, wherein the disengagement engaging portion is a cross-shaped groove formed on the back surface side of the bottom surface of the recess. 3. The dust-proof cover according to claim 1, wherein the detachable engaging portion has a function as a cushioning material in a box-stored state. 4. The dustproof cover according to claim 1, wherein the detachable engaging portion is a plurality of notches formed in a circumferential protrusion provided on the back surface side of the recess. 5. A substantially U-shaped engaging portion composed of a first engaging portion and a second engaging portion that can be engaged with the detaching engaging portion, and a rod-shaped member that fixes the engaging portion. A removal jig characterized by being used. 6. The removing jig according to claim 5, wherein the first engaging portion is engageable with the notch of the dustproof cover. 7. The removing jig according to claim 5, wherein the second engaging portion is engageable with the groove of the dustproof cover.