JP2559280Y2 - Sprinkler head - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing sprinkler head.

[0002]

2. Description of the Related Art In general, a sprinkler head is provided with a male screw threaded on a main body, and is mounted by screwing the male screw into a falling pipe. For example,
In the embedded sprinkler head shown in FIG. 3, a male screw 2 is screwed into the mounting portion T of the main body 1 and the male screw is screwed to a reducer (different diameter joint) R of the falling pipe P. It is.

Here, a conventional embedded sprinkler head (hereinafter simply referred to as a sprinkler head) shown in FIG. 3 will be briefly described. The main body 1 of the sprinkler head S is externally threaded with a male screw 2 and has a water guide hole 3 therein.
, And the tip is a valve seat 4. Below the male screw threaded portion of the body has engagement Gohen 5 for engaging a wrench when the sprinkler head mounting frame 6 is screwed at its lower.

A valve 8 integrated with a deflector 7 is installed on the valve seat 4 so as to seal the valve seat 4. The deflector 7 is suspended by a plurality of legs 9 on a ring 10 surrounding the outside of the water guide hole. The valve 8 is pressed against the valve seat at the pyrolysis part 12 via the guide post 11. The thermosensitive decomposition part 12 has an inner flange 13 at the lower end of the frame 6.
Is engaged.

In order to attach the sprinkler head to a falling pipe piped in the ceiling, first, a male screw 2 of the main body 1 is attached to a reducer R screwed to the falling pipe P.
The screwed, but since there should be no leakage between the male screw of the reducer and the body, or winding a seal tape male screw of the main body, has been performed the installation work after the sealing agent or coating .

[0006]

[Problem to be Solved by the Invention] The installation of the sprinkler head to the falling pipe in the ceiling is performed on a scaffold or a stepladder, so it is difficult to work by itself. Since the thickened sprinkler head had to be screwed into the reducer, the installation work became more difficult. In such places where installation work is difficult, it is easy to drop the sprinkler head, and the sprinkler head dropped from a high place may be damaged at its most important part, the heat-sensitive decomposition part, and cause an explosion accident or a water leakage accident after installation.

In addition, a special tool (wrench) is used to attach the sprinkler head. At this time, depending on the degree of force applied by the operator, the screwing may be insufficient, or conversely, may be excessively tightened. there was to Rukoto.

[0008] or occur leakage and screwed at the time of the sprinkler head attachment is insufficient, becomes as disfiguring protrusion of the sprinkler head from the ceiling surface is or becomes larger.

On the other hand, if the tightening at the time of mounting the sprinkler head is too strong, the threads of the reducer and the sprinkler head will be broken, and the screwing will not be possible completely.
Also may become a cause of water leakage, sprinkler head is too fall within the ceiling or Tsu want, it is the way to the ceiling it may become impossible to perform normal spraying in the event of a fire.

[0010] Further, the conventional sprinkler head is:
Indeed Although screws for mounting no related to functions or Tsu line sparging senses heat or fire extinguishing liquid was indispensable, because part fine thickness of this thread is thick, gravimetrically However, there is a problem that not only the weight becomes heavy but also the material cost increases.

The present invention has been made in view of these drawbacks of the conventional sprinkler head, and has as its object to provide a sprinkler head that can be easily mounted, can be completely mounted by anyone, and can be considerably reduced in weight. is there.

[0012]

The present inventor SUMMARY In order to achieve the above, fitted with a screw-in or drop a sprinkler head during installation work of the sprinkler head, for you or Tsu Oko water leakage accident after the attachment is to the fall tube of the sprinkler head a case, also the weight of the sprinkler head is heavy since it is thicker threaded portion of the wall thickness, and completed the present invention by paying attention to eliminating the threaded mounting portion of these disadvantages are eliminated.

[0013] In the present invention , the mounting portion to the falling pipe is
It has a structure that can fit tightly with the joint of the falling pipe.
Mounting sprinkler head,
The part is cylindrical, and the fall is formed at the cylindrical mounting part.
The sprinkler head is characterized in that an annular groove that can be fitted to a ball installed on the pipe is cut out.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
FIG. 2 is a perspective view of the sprinkler head of the present invention and a cross-sectional perspective view of a falling pipe to which the sprinkler head of the present invention is attached. FIG. 2 is a front sectional view of the sprinkler head of the present invention mounted on the falling pipe. The mounting portion T of the sprinkler head S has no screw and is a cylindrical frame 6. The main body 1 is screwed into the frame 6, and an annular groove 14 having a semicircular cross section is formed outside the frame 6. Other components are the same as those of the sprinkler head shown in FIG.

Next, the falling pipe to which the sprinkler head of the present invention is attached will be described. Falling pipe P
Has a diameter that allows the joint portion 15 to insert the mounting portion T (frame 6) of the sprinkler head S,
A step 16 is formed at the upper part of the joint part, and the diameter of the step 16 is smaller than that of the step part. An O-ring 17 is buried at a position slightly below the step 16 so as to partially protrude. In addition, a hole 18 tapered inward is drilled slightly below.
A ball 19 is provided in the hole. The distance from the step 16 to the ball 19 is determined by the distance between the upper end of the frame 6 and the annular groove 14.
The distance is the same as

A sliding cylinder 20 is provided outside the joint 15. The sliding cylinder 20 is urged downward by a spring 21 provided between the outside of the joint 15 and the sliding cylinder. A notch 22 is formed inside the lower end of the sliding cylinder 20, and a part of a stop ring 23 embedded outside the joint portion projects into the notch, and the sliding cylinder lowers below it. Has been blocked.

Next, the attachment of the sprinkler head of the present invention to the falling pipe will be described. First, the sliding cylinder 20 is pushed upward (arrow A) until the notch 22 reaches the position of the ball 19. Then, until then, the sliding cylinder 20
The ball 19, which has been pushed out to the inside wall of the joint portion 15 and slightly protruded inward from the joint portion 15, can be retracted into the notch 22. When this state is attained, the frame 6 as a mounting portion of the sprinkler head S is inserted (arrow B) until the upper end of the frame contacts the step 16.
At this time, the annular groove 14 of the sprinkler head S and the ball 19 of the joint portion 15 are aligned with each other, and the O-ring 17 comes into close contact with the upper portion of the frame 6. Then, when the sliding cylinder 20 is returned downward by the bias of the spring, the ball 19 is pushed by the inner wall of the sliding cylinder, and a part thereof protrudes inward, and comes into engagement with the annular groove of the sprinkler head. It will not come off from the joint part.

Although the embodiment shows the embedded type sprinkler head, it goes without saying that the present invention can be applied to a frame yoke type in which the frame has a horseshoe shape or a multi type in which the deflector covers the main body. The structure of the mounting portion of the sprinkler head includes any structure as long as the sprinkler head having no screw at the mounting portion can be hermetically fitted at the joint portion of the falling pipe.

[0019]

As described above, the sprinkler head of the present invention can be mounted simply by inserting the sprinkler head into the joint of the falling pipe.
No matter who goes, it can be completely installed without water leakage, and the sprinkler head is inserted until it hits the joint of the falling pipe at the time of installation, so that the position of projection from the ceiling is constant, and furthermore, the screw is used like a conventional sprinkler head. Because there is no water leakage due to lack of fitting or overtightening, and because of the simplicity that it can be installed with bare hands without the need for special tools when installing the sprinkler head, because the screw has been eliminated It has a number of excellent effects not found in conventional sprinkler heads, such as reduced overall weight and reduced material and transportation costs.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sprinkler head of the present invention and a cross-sectional perspective view of a falling pipe.

FIG. 2 is a front sectional view of the sprinkler head of the present invention attached to a falling pipe.

FIG. 3 is a front sectional view in which a conventional sprinkler head is attached to a falling pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3 Water guide hole 6 Frame 14 Annular groove 15 Joint part 16 steps 17 O-ring 18 hole 19 Ball 20 Sliding cylinder 21 Spring 22 Notch 23 Stop ring S Sprinkler head P Falling pipe T Sprinkler head mounting part

Claims (2)

(57) [Scope of request for utility model registration] (1) A falling part is attached to a falling pipe.
It can be sealed to the joint of the pipe
In the sprinkler head, the mounting portion is a cylinder
The cylindrical mounting part is attached to a falling pipe.
A sprinkler head, wherein an annular groove that can be fitted to the placed ball is formed . 2. The sprinkler head according to claim 1, wherein the attachment portion is a frame.