JP7304180B2 - fire detector mounting base - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire sensor mounting base which is installed on a mounting surface such as a ceiling surface for mounting a fire sensor.

A fire sensor that senses fire by sensing smoke, heat, flame, or the like is attached to a fire sensor mounting base, and is installed, for example, on a ceiling surface. There are two types of fire sensor mounting bases: an embedded type in which a part of the base is inserted into a mounting hole in the ceiling surface and embedded, and an exposed type in which a large portion of the base is exposed from the ceiling surface.

The present invention is directed to the embedded type, and as an example of the embedded type, Patent Document 1 discloses an "embedded sensor base".
What is disclosed in Patent Document 1 is "a base body mounted in a mounting hole of a plate-shaped member and having a bottomed cylindrical main body and a flange formed at the opening side end of the main body, and the main body a mounting bracket provided on the outside of the bottom of the sensor base and having a pressing piece for fixing the base body to the plate-like member by tightening a mounting screw, wherein the mounting bracket is made of a steel plate and having an edge portion at the end portion of the pressing piece on the contact side with the plate-like member” (see claim 1 of Patent Document 1).

The mounting bracket in Patent Document 1 is composed of a holding piece, a screw insertion portion, and the like. side edge) is notched in a substantially U shape.
In the embedded type sensor base of Patent Document 1, the mounting bracket is tilted from its upright state with the screw insertion portion on the base end side as a fulcrum so that the tip side falls outward, and the tip side presses the ceiling surface. and attached to the ceiling surface (see FIGS. 2 and 4 of Patent Document 1).

JP 2010-55459 A

The fire sensor mounting base has a shape corresponding to the fire sensor to be mounted, and the fire sensor mounting base disclosed in Patent Document 1 corresponds to a tall fire sensor. Therefore, as shown in FIGS. 2 and 4 of Patent Literature 1, the height of the fire sensor mounting base is high, and the shape is such that it is deeply embedded in the ceiling space. For this reason, there is a large height difference between the lower surface of the ceiling surface (the surface of the flange that contacts the ceiling surface) and the mounting position of the mounting bracket on the base body in the mounted state. Assuming it's big.
In other words, the mounting bracket disclosed in Patent Document 1 is of the type for mounting the fire sensor mounting base on the ceiling surface having a normal thickness under the above conditions.

In recent years, a room with a high soundproofing effect is desired in a building, and therefore, it is assumed that the thickness of the ceiling surface is thick, for example, 35 mm or more.
As described above, the fire sensor mounting base disclosed in Patent Document 1 is intended for a tall fire sensor, and the height difference between the installation position of the mounting bracket on the base body and the lower surface of the ceiling surface is large. , and corresponding mounting brackets are provided.
Therefore, when the height of the fire sensor is low, the height difference between the installation position of the mounting bracket on the base body and the lower surface of the ceiling surface becomes small. In addition, there is a problem that the mounting bracket interferes with the edge of the opening on the ceiling surface during installation, making installation impossible.

The present invention was made to solve this problem, and even if the height difference between the installation position of the mounting bracket on the base body and the lower surface of the mounting surface such as the ceiling surface is small, it is possible to install a thick mounting bracket. The object is to provide a fire sensor mounting base that can be mounted on a surface.

(1) A fire sensor mounting base according to the present invention is installed on a mounting surface provided with an opening for mounting a fire sensor,
a base body to which the fire sensor is detachably mounted; and a base body provided on the base body so as to tilt outward from an upright state with the base end side as a fulcrum to fall down, and the opening of the mounting surface. a base mounting bracket that mounts the base body to the mounting surface by sandwiching the edge portion in cooperation with the base body;
The base mounting bracket has a rising portion that rises from the base end side in an upright state, and a pressing portion that is formed continuously with the rising portion and whose tip presses the opening edge in the collapsed state,
The pressing portion is bent or curved from the rising portion toward the radially inner direction of the base body in an upright state, and then bent or curved toward the radially outward direction,
Even if it is installed on a mounting surface with any allowable thickness, in the installed state, in the area surrounded by the straight line connecting the upper end of the rising portion and the tip and the holding portion, or the boundary portion of the area. and an upper end corner portion in the thickness direction of the opening edge portion of the mounting surface is arranged.

(2) In addition, in the device described in (1) above, the pressing portion includes a first piece portion that is continuous with the rising portion and is bent substantially at a right angle to the rising portion; a second piece that is continuous with the portion and is bent in a direction parallel to the rising piece; and a third piece that is continuous with the second piece and extends obliquely outward in the radial direction. It is characterized by

(3) In addition, in the above (1) or (2), the base mounting bracket is formed on the base end side of the rising portion and has a bolt insertion hole through which a fixing bolt is inserted. having a piece
the base body has a pair of side wall portions erected so as to surround at least both sides of the fixed piece portion;
The side wall portion is characterized in that its height and width in the depth direction are set so that the nut does not idle when the nut is screwed onto the tip of the bolt.

In the present invention, the base mounting bracket provided on the base body has a rising portion and a pressing portion, and the pressing portion is bent or curved from the rising portion toward the radially inner direction of the base body in an upright state. , is bent or curved in the radially outward direction, and even if it is installed on a mounting surface with any possible thickness, in the installed state, the upper end of the rising portion and the tip of the pressing portion are connected. Since the upper end corner in the thickness direction of the opening edge of the mounting surface is arranged in the area surrounded by the straight line and the holding part or on the boundary of the area, installation of the mounting bracket on the base body Even if the height difference between the position and the lower surface of the mounting surface such as the ceiling surface is small, it can be mounted on a thick mounting surface.

1 is a perspective view of a fire sensor mounting base according to an embodiment of the present invention; FIG. FIG. 2 is an exploded perspective view of the fire sensor mounting base shown in FIG. 1; FIG. 4 is a perspective view showing an upright state of the base mounting bracket of the fire sensor mounting base according to the embodiment of the present invention; It is a figure which shows the state which attached the fire sensor attachment base shown in FIG. 1 to the thickest attachment surface which can be installed. It is a figure which shows the state which attached the fire sensor mounting base shown in FIG. 1 to the thinnest mounting surface which can be installed. FIG. 3 is a side view of the fire sensor mounting base shown in FIG. 1 in a state where the base mounting bracket is erected; It is a figure explaining the subject which the side wall part provided in the base main body of the fire sensor mounting base which concerns on embodiment of this invention solves (part 1). It is a figure explaining the subject which the side wall part provided in the base main body of the fire sensor mounting base which concerns on embodiment of this invention solves (2).

As shown in FIGS. 1 to 3, the fire sensor mounting base 1 according to the present embodiment is installed on a mounting surface 3 (see FIGS. 4 and 5) provided with an opening, and a fire sensor is mounted. A base body 5 to which the fire sensor is detachably mounted, and a base body 5 provided on the base body 5, which cooperates with the base body 5 to clamp an opening edge 7 of the mounting surface 3. It has a base mounting bracket 9 for mounting the base body 5 on the mounting surface 3 .
Each configuration will be described in detail.

<Base body>
The base body 5 is to be detachably mounted with a fire sensor. has 13.

《Body part》
The main body 11 has a bottomed cylindrical shape with a bottom opening at the center. On the inner surface of the bottom of the main body 11 (lower surface in the installed state), there is provided a blade receiving metal fitting (not shown) that engages with the blade metal fitting provided on the fire sensor.
In addition, on the outer surface (upper surface in the installed state) of the bottom portion of the body portion 11, a pair of mounting bracket installation portions 15 for installing a pair of base mounting brackets 9 are provided at positions facing each other across the opening. .

The mounting bracket installation portion 15 includes a pair of side wall portions 17 erected so as to surround at least both sides of a fixing piece portion 35 (to be described later) of the base mounting bracket 9, and an engaging claw 33 of the fixing piece portion 35 that engages. and a stop portion 19 .
The side wall portion 17 has a height h and a width w in the depth direction so that the nut 21 does not idle when the nut 21 is screwed onto the tip of the bolt 29 .

《Brim》
The collar portion 13 has a function of sandwiching the opening edge portion 7 of the mounting surface 3 in cooperation with the base mounting bracket 9 when mounting the fire sensor mounting base 1 to the mounting surface 3 .
The collar portion 13 has a circular outer periphery and is set to have a larger diameter than the opening of the mounting surface 3 . A plurality of ribs 23 are radially provided on the upper surface of the collar portion 13 to increase rigidity.

<Base mounting bracket>
The base mounting bracket 9 is provided on the base body 5 so as to tilt outward from a standing state with the base end side as a fulcrum, in other words, a standing state with respect to the base body 5 to a fallen state, The base body 5 is attached to the mounting surface 3 by holding the opening edge 7 of the mounting surface 3 together with the base body 5 .

The base mounting bracket 9 includes a rising portion 25 rising from the base end side in the upright state, a pressing portion 27 formed continuously with the rising portion 25 and having a tip end thereof pressing the opening edge portion 7 of the mounting surface 3 in the collapsed state, and a rising portion. A fixing piece portion 35 is formed on the base end side of the portion 25 and has a bolt insertion hole 31 through which a fixing bolt 29 is inserted and a locking claw 33 that locks the locking portion 19 . In addition, the bolt insertion hole 31 is an elongated hole extending from the fixed piece portion 35 to the rising portion 25 .

The holding portion 27 includes a first piece portion 27a that is continuous with the rising portion 25 and is bent substantially at right angles to the rising portion 25, and a first piece portion 27a that is continuous with the first piece portion 27a and is bent in a direction parallel to the rising portion 25. It comprises a formed second piece 27b and a third piece 27c continuing from the second piece 27b and obliquely extending radially outward. A pawl 37 is provided which abuts the surface 3 .
Then, as shown in FIG. 3, an area surrounded by the holding portion 27 and a straight line connecting the upper end A of the rising portion 25 and the tip B of the third piece portion 27c is the interference between the holding portion 27 and the mounting surface 3. (hereinafter referred to as "relief area S").

As shown in FIG. 4 showing the state of being attached to the thickest mounting surface 3 that can be installed and FIG. Even when installed, in the installed state, the upper corner portion C in the thickness direction of the opening edge portion 7 on the mounting surface 3 is arranged within the relief portion region S or at the boundary portion between the regions.

The operation of the fire sensor mounting base 1 of this embodiment configured as described above will be described.
As shown in FIG. 6, the base mounting bracket 9 is placed in an upright position and inserted into an opening provided in the mounting surface 3 such as the ceiling surface, and the collar portion 13 is brought into contact with the lower surface of the mounting surface 3 . After that, the nut 21 is lowered by turning the bolt 29 using a tool such as a screwdriver, and the base mounting bracket 9 is lowered with the locking portion 19 as a fulcrum, and the flange 13 and the base mounting bracket 9 sandwich the 3.

The thickest mounting surface 3 on which the fire sensor mounting base 1 of the present embodiment can be installed is such that the third piece 27c is parallel to the mounting surface 3 as shown in FIG. At this time, as shown in FIG. 4, the upper end corner portion C in the thickness direction of the opening edge portion 7 is arranged in the clearance region S. As shown in FIG.
The thinnest mounting surface 3 on which the fire sensor mounting base 1 can be installed is such that the second piece 27b and the rising portion 25 are parallel to the mounting surface 3, as shown in FIG. At this time, as shown in FIG. 5, the upper end corner portion C in the thickness direction of the opening edge portion 7 is arranged at the boundary portion of the clearance region S. As shown in FIG.

As can be seen from FIGS. 4 and 5, the upper corner portion C is located within the clearance region S regardless of whether the thickness of the mounting surface 3 is the thickest or any thickness between the thickest and thinnest. be done. Further, when the thickness of the mounting surface 3 is the thinnest, the upper end corner portion C is arranged at the boundary portion of the clearance portion region S. As shown in FIG.
Thus, in the base mounting bracket 9 of the present embodiment, the clearance region S prevents interference with the opening edge 7 of the mounting surface 3. In other words, the clearance region S , and can be installed on a mounting surface 3 such as a thick soundproof type ceiling.

In this embodiment, the installation position of the base mounting bracket 9 in the installed state [the outer surface of the bottom of the main body portion 11 in the base body 5 (the upper surface in the installed state)] and the lower surface of the ceiling surface have a small height difference ( 35 mm), so that even if the height difference is small, it can be attached to the thick attachment surface 3 .

Further, in this embodiment, a pair of side walls 17 are provided so as to surround both sides of the fixed piece 35 of the base mounting bracket 9, and the nuts 21 are screwed onto the extreme ends of the bolts 29 on the side walls 17. The height h and the width w in the depth direction are set so that the nut 21 does not idle in the mated state. The reason for doing so will be described with reference to FIGS. 7 and 8. FIG.
Note that the function of the side wall portion 17 is not limited to the base mounting bracket 9 shown in the above embodiment. showing.

FIG. 7 shows that the nut 21 idles because the height of the side wall portion 41 is lower than that of the nut 21 . Originally, the nut 21 should be arranged so that the short side of the nut 21 is along the side wall portion 41 (see the nut 21 on the right side of FIG. 1), but when the nut 21 idles, as shown in FIG. In some cases, the short sides of the nut 21 are slanted with respect to the side wall portion 41 . If the bolt 29 is tightened in this state, as shown in FIG. 8, the installation is completed without the bolt 29 being completely tightened. If the installation is completed in the state shown in FIG. 8, it is assumed that the bolt 29 will be loosened when an external force acts because it is not the original mounting state.
On the other hand, by making the side wall portion 41 higher than the state where the nut 21 is at the tip of the bolt 29 so that the nut 21 does not idle, the direction of the nut 21 does not change during the mounting work. , the state shown in FIG.

In the above description, the height of the side wall portion 41 is increased. However, as shown in FIG. When the bolt 29 tilts, the nut 21 may protrude from the side wall 41 in the depth direction. In this case, the height of the side wall 41 alone cannot prevent the nut from spinning. Therefore, in the present embodiment, the depth of the side wall portion 17 is also set so that the nut 21 does not idle.

In the above description, as the shape of the pressing portion 27, the shape having the first piece portion 27a, the second piece portion 27b, and the third piece portion 27c was described, but the shape of the pressing portion 27 is limited to this. However, any shape may be used as long as it bends or curves radially inward of the base body 5 from the rising portion 25 in an upright state, and then bends radially outward.

1 Fire Sensor Mounting Base 3 Mounting Surface 5 Base Main Body 7 Opening Edge 9 Base Mounting Metal 11 Main Body 13 Flange 15 Mounting Metal Mounting Part 17 Side Wall 19 Locking Part 21 Nut 23 Rib 25 Rising Part 27 Holding Part 27a 1 Piece 27b 2nd Piece 27c 3rd Piece 29 Bolt 31 Bolt Insertion Hole 33 Locking Claw 35 Fixed Piece 37 Claw 39 Base Mounting Bracket (Conventional Example)
41 side wall (conventional example)
S Relief area

Claims (3)

A fire sensor mounting base installed on a mounting surface provided with an opening for mounting a fire sensor,
a base body to which the fire sensor is detachably mounted; and a base body provided on the base body so as to tilt outward from an upright state with the base end side as a fulcrum to fall down, and the opening of the mounting surface. a base mounting bracket that mounts the base body to the mounting surface by sandwiching the edge portion in cooperation with the base body;
The base mounting bracket has a rising portion that rises from the base end side in an upright state, and a pressing portion that is formed continuously with the rising portion and whose tip presses the opening edge in the collapsed state,
The pressing portion is bent or curved from the rising portion toward the radially inner direction of the base body in an upright state, and then bent or curved toward the radially outward direction,
Even if it is installed on a mounting surface with any allowable thickness, in the installed state, in the area surrounded by the straight line connecting the upper end of the rising portion and the tip and the holding portion, or the boundary portion of the area. and (2) an upper corner in the thickness direction of the opening edge of the mounting surface. The pressing portion includes a first piece portion that is continuous with the rising portion and is bent substantially perpendicularly to the rising portion, and a first piece portion that is continuous with the first piece portion and is bent in a direction parallel to the rising piece portion. 2. The fire sensor according to claim 1, further comprising a formed second piece and a third piece continuing from the second piece and obliquely extending radially outward. mounting base. The base mounting bracket has a fixing piece portion formed on the base end side of the rising portion and having a bolt insertion hole through which a fixing bolt is inserted,
the base body has a pair of side wall portions erected so as to surround at least both sides of the fixed piece portion;
3. The side wall portion according to claim 1, wherein the height and the width in the depth direction are set so that the nut does not idle when the nut is screwed onto the tip of the bolt. Fire detector mounting base.

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