JP2002200189A - Cover for sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a sprinkler head preventing an excess load from being applied to a low melting point alloy for bonding a fitting body and a lid member by a spring action of a spring material arranged between the lid member and the fitting body fitted to a ceiling, a wall face, or a sprinkler head body. SOLUTION: The cover for the sprinkler head comprises the fitting body 10, the low melting point alloy 4 arranged in a plurality of groove parts or hole parts 16 formed on the fitting body 10, and the elastic lid member wherein claws 21 are formed so as to fit into the groove parts or the hole parts 16 formed on the fitting body. The fitting body 10 and the lid member 20 are engaged by the low melting point alloy 4 therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a sprinkler head which covers a mounting hole of a sprinkler head installed on a ceiling surface or a wall surface and covers the sprinkler head.

[0002]

2. Description of the Related Art As a conventional sprinkler head cover, for example, there is a sprinkler head guard described in Japanese Utility Model Publication No. 7-37638, which is shown in FIG. The guard is composed of a mounting body 1, a spring material 2, a lid member 3, and a low melting point alloy 4.

The mounting body 1 is annular, and has a plurality of projections 5 formed therearound, and a hole 6 through which a wood screw can be passed. A plurality of L-shaped legs 7 are installed on the attachment body. The legs 7 are made of a material that allows the low melting point alloy 4 to be soldered. The low melting point alloy has a melting point lower than the operating temperature of the sprinkler head. The spring member 2 is a disc spring having substantially the same size as the mounting body 1 described above, and has cutouts 8.

The lid member 3 has a concave shape, and a flange 9 having substantially the same size as the mounting body 1 is formed around the upper portion. The flange must be made of a material that can be soldered because it is joined to the leg 7 of the mounting body 1 with a low-melting alloy. However, a material that can be soldered only at the joint of the leg may be used. A plurality of openings 10 are provided around the lid member.

To assemble the guard, the leg 7 of the mounting body 1 is inserted into the notch 8 of the spring material 2, and the leg 7 is mounted on the flange 9 of the lid member 3.
Then, the leg 7 and the flange 9 are bonded with the low melting point alloy 4.

[0006] The guard assembled in this manner is mounted substantially coaxially with the hole 13 of the ceiling 12 to which the sprinkler head 11 is mounted. The mounting is performed by mounting body 1
It is directly attached to the ceiling 12 through the wood screw 14 in the hole 6 of the above.

Next, the operation of the above-mentioned conventional guard will be described. When a fire occurs, the guard is heated by the heat of the fire, and the low melting point alloy 4 that has bonded the mounting body 1 and the lid member 3 melts. At this time, since a spring force is applied to the lid member so as to drop the lid member, the lid member is completely dropped by the spring force in addition to the weight of the lid member.

[0008]

However, in the conventional guard, the spring member 2 acting in the direction of dropping the lid member 3 is provided between the mounting member 1 and the lid member 3, so that the mounting member 1 And the force to separate the lid member 3 is low melting point alloy 4
If it is left for a long time with one part of the adhesive part removed for a long time, the other adhesive parts will not be able to withstand the spring force, and the lid member 3 It may come off.

In order to solve the above-mentioned problems, the present invention provides a sprinkler head cover in which a low-melting-point alloy is not excessively loaded by a spring action of a spring material. .

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 comprises an attachment body attached to a ceiling or a wall or a sprinkler head body,
A low-melting-point alloy installed in a plurality of grooves or holes formed in the mounting body, and an elastic lid member formed with claws formed to fit into the grooves or holes of the mounting body; This is a sprinkler head cover in which a lid member is locked via a low melting point alloy.

According to a second aspect of the present invention, in the sprinkler head cover according to the first aspect of the present invention, when the force exerted by the claws of the lid member is concentrated on one point of the low melting point alloy, the low melting point alloy causes a creep phenomenon. Since there is a possibility of causing the deformation of the low melting point alloy, the surface of the low melting point alloy is placed between the low melting point alloy and the claws of the lid member so that the force acting on the claw acts uniformly on the surface of the low melting point alloy. A contacting member is interposed.

According to a third aspect of the present invention, in the cover for a sprinkler head according to the first and second aspects of the present invention, the low melting point alloy is filled in a container installed on the mounting body. A member that comes into surface contact with the surface of the low melting point alloy that fits loosely into the inner diameter of the container is in contact with the melting point alloy, and the claws of the lid member press the members that come into surface contact with the surface of the low melting point alloy.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view showing a state in which the sprinkler head cover of the first embodiment is attached to the sprinkler head, FIG. 2 is a perspective view of the first embodiment, FIG. 3 is an enlarged view of a portion A in FIG. 7 illustrates another embodiment of one embodiment.

The structure of the first embodiment includes a mounting body 10,
The lid member 20 is made of the low melting point alloy 4. The mounting body 10 has a cylindrical shape, and the cylindrical portion 11 is cut out from the upper end to the middle of the cylindrical portion 11 by a plurality of notches 12. Inside the tongue 13 between the notches 12, 12,
A plurality of parallel grooves 14 that fit into the main body groove portions B of the sprinkler head S are protruded in a horizontal line.

A lower end of the cylindrical portion 11 is a flange-shaped disk portion 15, and a plurality of grooves 16 for mounting the low melting point alloy 4 are formed on the periphery of the disk portion 15. The low melting point alloy 4 is placed in the groove portion 16, and the claw 21 of the lid member 20 made of an elastic material urges the low melting point alloy 4 toward the center of the mounting body 10. At this time, the locking member 17 is erected at a position facing the direction in which the spring force of the claw 21 acts, and the lid member 20 is locked to the mounting member 10 by its own elasticity via the low melting point alloy 4.

The cover member 20 has a bowl shape and is made of an elastic material. Claws 21 are erected at positions corresponding to the grooves 16 of the mounting body 10. When the lid member 20 is not assembled, the diameter of a circle in contact with the back 22 of each of the claws 21 is larger than the outer diameter of the disk portion 15 of the mounting body 10. That is, when the low melting point alloy 4 is not interposed in the groove 16 of the attachment 10, the lid member 20 does not engage with the attachment 10.

An opening 23 is provided on the bottom surface of the lid member 20 so that when a fire occurs immediately below the sprinkler head, the heat of the fire is easily transmitted to the heat collector of the sprinkler head. The shape of the opening 23,
The number, arrangement, etc. may be in any combination.

Further, when a fire occurs on the floor surface at a position away from the sprinkler head, heat of the fire is transmitted to the sprinkler head along the ceiling surface.
The heat of the fire flows into the cover member 20 from the cutout portion 24 where the claws 21 are erected, so that the heat is not prevented from being transmitted to the sprinkler head.

The material of the lid member 20 may be a metal or resin material which is an elastic material and has a strength enough to withstand an external impact. However, if it promotes the dissolution of the low melting point alloy 4, a metal having good thermal conductivity is used. Preferably, a material is used.

When the low melting point alloy 4 is used at a temperature lower than the operating temperature of the sprinkler head, the lid member 20 falls earlier than the sprinkler head operates. If the sprinkler head operates before the lid member 20 falls, the lid member 20 comes off and falls due to the water discharge pressure of the sprinkler head.

The shape of the low melting point alloy 4 is determined by the
Any shape such as a rectangular shape, a spherical shape, a bale shape, etc. may be used as long as the lid member 2 can be stably locked. However, if stress is applied to a certain point of the low melting point alloy for a long period of time, a creep phenomenon may occur and the low melting point alloy 4 may be deformed. 4
A member 31 that comes into surface contact with the surface of the low-melting alloy 4 may be interposed between them. Other components considering the creep phenomenon will be described in a second embodiment.

Next, a second embodiment will be described with reference to FIGS. FIG. 5 is a sectional view showing a state in which the sprinkler head cover according to the second embodiment is attached to the sprinkler head, and FIG. 6 is an enlarged view of a portion A in FIG.

The difference between the second embodiment and the first embodiment is that the low melting point alloy 4 is filled in a container 32 and installed on the mounting body 1.
And a member 31 that comes into surface contact with the surface of the low-melting alloy 4 is interposed between them.

The structure of the container 32 and the member 31 which comes into surface contact with the surface of the low melting point alloy 4 is described in
No. 36985, corresponding to the cylinder and plunger of the sprinkler head,
Since the configuration and operation of the components are widely known to those skilled in the art, a detailed description thereof will be omitted. Other configurations and operations are the same as those of the first embodiment.

[0025]

As described above, according to the present invention, since the lid member is made of an elastic material, the low-melting point alloy is subjected to a long period of time under an unreasonable load as in the conventional example. The adhesive force of the alloy is weakened and the lid member does not fall.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state where a first embodiment is attached to a sprinkler head.

FIG. 2 is a perspective view of the first embodiment.

FIG. 3 is an enlarged view of a portion A in FIG. 1;

FIG. 4 shows another embodiment of the first embodiment.

FIG. 5 is a sectional view showing a state where the second embodiment is attached to a sprinkler head.

FIG. 6 is an enlarged view of a portion A in FIG. 5;

FIG. 7 is a conventional guard for a sprinkler head.

[Explanation of symbols]

 Reference Signs List 4 low melting point alloy 10 mounting body 15 disk part 16 groove part 20 lid member 21 nail

Claims (3)

[Claims] 1. A mounting member attached to a ceiling, a wall, or a sprinkler head main body, a low melting point alloy installed in a plurality of grooves or holes formed in the mounting member, and a groove or hole in the mounting member. A sprinkler head cover comprising an elastic lid member formed with a fitting claw, wherein the mounting body and the lid member are locked via a low melting point alloy. 2. The claw of the lid member according to claim 1, wherein a member that comes into surface contact with the surface of the low melting point alloy is interposed between the low melting point alloy and the claw of the lid member. Cover for sprinkler head. 3. The low melting point alloy according to claim 1 or 2,
Filled in a container installed in the mounting body, a member that is in surface contact with the surface of the low-melting alloy loosely fitted to the inner diameter of the container is in contact with the low-melting alloy in the container, and the claw of the lid member is A cover for a sprinkler head, wherein a member that comes into surface contact with the surface of the low melting point alloy is pressed.