JP3923484B2 - Mounting mechanism between flash type sprinkler head and sealing plate - Google Patents

Description

The present invention relates to a fire-extinguishing sprinkler head installed in a building, and more particularly to a mechanism for attaching a flash-type sprinkler head installed in a ceiling and a sealing plate.

Sprinkler heads are attached to a down pipe piped in the ceiling. Depending on the type of sprinkler head, there are ones installed on the lower surface of the ceiling and others installed in a state embedded in the ceiling. Is generally referred to as a “flash sprinkler head”.

A flash-type sprinkler head (hereinafter referred to as “sprinkler head”) is installed with a lower end portion protruding from a hole drilled in a ceiling. Therefore, there is an annular gap between the sprinkler head and the hole, but dust and dust in the ceiling fall from this gap, and this gap is not preferable for the aesthetics of the room, A sealing plate is installed to hide the gap.

The sealing plate is composed of a cylindrical part that can be locked to the outer diameter of the sprinkler head, and a flange-shaped flange part that extends outward from the lower end of the cylindrical part, and the outer diameter of the flange part is larger than the above-mentioned ceiling hole. It has become.

Several steps are formed in the horizontal direction on the inner diameter of the cylindrical portion, and the sealing plate is attached to the sprinkler head by engaging the linear protrusion with a horizontal groove formed on the outer diameter of the sprinkler head. Locked.

Specifically, by inserting and pushing up the cylindrical portion of the sealing plate from the lower end of the sprinkler head installed in the ceiling, the linear protrusion on the inner periphery of the cylindrical portion and the horizontal groove on the outer periphery of the sprinkler head are fitted together. Is locked.

However, since the sealing plate described above may fall due to the locking of the sealing plate due to the pitching of the earthquake, the applicant of the present invention has a structure that does not come off even during an earthquake and a sprinkler to which the sealing plate is attached. The head was invented (see Patent Document 1).

The above-mentioned invention has a structure in which a male screw provided on the outer periphery of the sprinkler head and a female screw provided on the inner periphery of the sealing plate are screwed together and are not easily removed. In addition, by providing a guide function to the smooth part where the screw part is not installed so that it can withstand the impact caused by the rolling of the earthquake, the sealing plate firmly protects the sprinkler head even in the event of an earthquake. As a result, the sprinkler head can be prevented from being damaged.

JP-A-9-94307 (page 4-5, FIG. 1)

However, since the sprinkler head and the sealing plate are connected by screws, when the sealing plate is installed on the sprinkler head, it must be screwed while rotating the sealing plate. The time required for installation is increased as compared with the type that is fitted by the protrusion.

Also, when attaching the sealing plate to the sprinkler head, the operator must reach for the sprinkler head installed on the ceiling and rotate the sealing plate, and several hundred to several thousand sprinklers in one building. Considering that the head is installed, an increase in installation time leads to an increase in the burden on the operator.

Therefore, in the present invention, in view of the above problems, when installing the sealing plate on the sprinkler head, it is possible to install it easily in a short time, and after installation, the sprinkler head and the sealing plate come off due to an impact by an external force. An object of the present invention is to provide an attachment mechanism with a sprinkler head and a sealing plate, which are difficult structures.

In order to achieve the above object, according to the first aspect of the present invention, a spiral groove is threaded on the outer peripheral surface of the flash type sprinkler head, and a connecting means for the flash type sprinkler head is provided on the inner periphery of the cylindrical portion. in was sealing plate, on the inner periphery of the cylindrical portion of the sealing plate, it has a screwable protrusion to said spiral groove,該Tokki is displaceable toward the outer circumference by the deflection, further protrusion center The cross-sectional shape of the spiral groove threaded on the outer peripheral surface of the flash type sprinkler head with a shape projecting obliquely downward toward the head is the attachment mechanism between the flash type sprinkler head and the sealing plate that is a saw type with the upper side being horizontal It is.

According to a second aspect of the invention, the cylindrical portion of the sealing plate, and wherein the notched by longitudinal grooves, tongues are formed, the projections on the inner surface side of the tongue-shaped body is formed A flush sprinkler head and a sealing plate attachment mechanism according to claim 1.

Third aspect of the present invention, the projection is on the inner periphery of the cylindrical portion of the sealing plate, a mounting mechanism of a flash-type sprinkler head and the sealing plate according to claim 1, characterized in that protrudes spirally.

According to a fourth aspect of the present invention, there is provided a flange-shaped flange that extends outward at the lower end of the cylindrical portion of the sealing plate, and a cover plate is connected to the flange. It is an attachment mechanism of a sprinkler head and a sealing plate.

According to a fifth aspect of the present invention, there is provided a flange-shaped flange that extends outward at the lower end of the cylindrical portion of the sealing plate, and an impact protection member is installed on the flange. This is a mechanism for attaching the mold sprinkler head and the sealing plate.

According to the present invention, since the protrusion provided on the inner periphery of the cylindrical portion of the sealing plate can be displaced in the outer peripheral direction by bending, the sprinkler head installed in the ceiling when the sealing plate is attached to the sprinkler head. When the cylindrical part of the sealing plate is pushed into the lower end, the protrusion is displaced outward at the thread portion of the male screw, so that the upper surface of the collar part at the lower end of the sealing plate can be pushed to a position close to the lower surface of the ceiling, and the protrusion is a sprinkler. It is locked to a male screw on the outer periphery of the head.

Even if the sealing plate is pulled downward after the sealing plate is installed, the projection plate is locked to the male screw on the outer periphery of the sprinkler head, so that the sealing plate does not come off.

Also, when the earthquake rolls, the inner surface of the sealing plate is in contact with the outer periphery of the male screw of the sprinkler head, and the outer surface of the male screw of the sprinkler head is in contact with the inner periphery of the sealing plate. Since the length is given a width, the sealing plate does not come off even from a side impact.

When removing the sealing plate from the sprinkler head, the projection can be moved downward along the spiral groove by rotating the sealing plate.

In the invention of claim 2, the protrusion has a shape protruding obliquely downward toward the center, and the cross-sectional shape of the spiral groove screwed on the outer peripheral surface of the sprinkler head is a saw shape with the upper side in a horizontal state. After the sealing plate is installed on the sprinkler head, the sealing plate cannot be pulled out downward.

According to a third aspect of the present invention, the cylindrical portion of the sealing plate is cut out by a longitudinal groove to form a tongue-like body, and the protrusion is formed on the inside thereof, so that the tongue-like body itself has a flexibility and has an outer periphery. By making the displacement in the direction possible, the projection is configured to be easily displaced in the outer peripheral direction.

According to a fourth aspect of the present invention, since the shape of the protrusion is a spiral shape, the protrusion and the spiral groove provided on the outer periphery of the sprinkler head are locked by line contact, and the area of the locking portion is increased. After installation of the sealing plate, it is difficult to pull the sealing plate downward.

The invention according to claim 5 is that the sprinkler head is covered and hidden by the cover plate by installing the cover plate on the flange portion provided at the lower end of the sealing plate, so that the ceiling surface does not give an uncomfortable feeling. It will be excellent.

According to a sixth aspect of the present invention, the lower part of the sprinkler head protruding from the lower surface of the ceiling is protected from external impact by providing an impact protection member at the flange provided at the lower end of the sealing plate.

A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a sealing plate installed on a sprinkler head in the first embodiment. FIG. 2 is a cross-sectional view of the sealing plate. FIG. 3 is an enlarged cross-sectional view of a locking portion between the sprinkler head and the sealing plate. FIG. 4 is an explanatory view when a cover plate is provided on the sealing plate. FIG. 5 is an explanatory view when a guard is provided on the sealing plate.

The sprinkler head 1 according to the first embodiment is provided with a spiral groove 2 on the outer peripheral portion, and the spiral groove 2 has a saw-like cross section with a horizontal upper side.

The sealing plate 3 includes a cylindrical portion 4 provided with an engaging portion with the spiral groove 2 and a flange-shaped flange portion 5 extended outward from the lower end of the cylindrical portion 4.

A plurality of protrusions 6 are formed on the inner peripheral surface of the cylindrical portion 4 so as to protrude obliquely downward. The protrusion 6 is provided at a position where it can be screwed with the spiral groove 2 of the sprinkler head 1.

Further, the sealing plate 2 is made of an elastic material such as metal or resin, and the protrusion 6 can be displaced by elastic deformation.

The flange 5 covers and covers the gap between the sprinkler head 1 and a hole drilled in the ceiling. As shown in FIG. 4, a cover plate 7 that covers the sprinkler head 1 is provided on the flange portion 5, and a guard 8 is provided on the flange portion 5 to protect the sprinkler head 1 from an impact due to external force as shown in FIG. 5. It is also possible.

Subsequently, a procedure for attaching and removing the sprinkler head and the sealing plate in the first embodiment will be described.

First, the cylindrical portion 4 of the sealing plate 3 is inserted from the lower end of the sprinkler head 1 installed on the ceiling, and the ceiling plate is pushed upward to a position where the upper surface of the flange portion 5 is close to the lower surface of the ceiling.

At this time, the protrusion 6 of the sealing plate 3 hits the spiral groove 2 of the sprinkler head 1. However, since the protrusion 6 bends in the outer peripheral direction due to elasticity, the protrusion 6 can be smoothly pushed in without being caught by the spiral groove 2. Then, the sealing plate 3 is rotated left and right to lock the protrusion 6 in the spiral groove 2.

Next, in the case of removing the sealing plate 3, the sprinkler head 1 and the sealing plate 3 are locked by the helical groove 2 having a saw-shaped cross section and the protrusion 6 projecting obliquely downward. Cannot be pulled out.

When the sealing plate 3 is rotated, the protrusion 6 can move up and down along the spiral groove 2, so that the sealing plate 3 is moved downward and removed from the sprinkler head 1.

Next, Example 2 will be described with reference to FIGS. FIG. 6 is a sectional view of a sealing plate installed on the sprinkler head in the second embodiment. FIG. 7 is a sectional view of the sealing plate. Moreover, about the part with the same structure as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The second embodiment is different from the first embodiment in that a plurality of tongues 10 are formed by notches 9, 9... In the cylindrical portion 4 of the sealing plate 3.

The tongue 10 can be displaced inward and outward due to the elasticity of the material of the sealing plate 3. When the sealing plate 3 is attached to the sprinkler head 1, the tongue 10 is displaced outward and sealed. The plate 3 is smoothly attached to the sprinkler head 1.

A spiral projection 11 is formed inside the tongue-like body 10. The protrusion 11 has a cross-sectional shape with the lower side being horizontal.

The spiral projection 11 can be screwed with the spiral groove 2 formed on the outer periphery of the sprinkler head 1, and can form a spiral projection that is two or three with respect to the spiral groove 2. Is possible.

Since the attachment and removal procedures of the sprinkler head and the sealing plate of the second embodiment are the same as those of the first embodiment, a description thereof will be omitted. As in the first embodiment, a cover plate 7 and a guard 8 can be installed on the flange portion 5 of the sealing plate 3.

Sectional drawing of the sealing plate installed in the sprinkler head in Example 1 Cross section of sealing plate Enlarged sectional view of the locking part between the sprinkler head and the sealing plate Explanatory drawing when a cover plate is provided on the sealing plate Explanatory drawing when a guard is provided on the sealing plate Sectional drawing of the sealing plate installed in the sprinkler head in Example 2 Cross section of sealing plate

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sprinkler head 2 Spiral groove 3 Sealing plate 4 Cylindrical part 5 Gutter part 6 Protrusion 10 Tongue 11 Helical protrusion

Claims (5)

In the sealing plate in which a spiral groove is threaded on the outer peripheral surface of the flash type sprinkler head and the connecting means with the flash type sprinkler head is provided on the inner periphery of the cylindrical portion, the inner periphery of the cylindrical portion of the sealing plate is has a screwable protrusion to said spiral groove,該Tokki the Ri displaceable der outer peripheral direction by the deflection, further protrusion in shape protruding obliquely downward toward the center, of the flash-type sprinkler head A mechanism for attaching a flash-type sprinkler head and a sealing plate, characterized in that the cross-sectional shape of the spiral groove threaded on the outer peripheral surface is a saw-shaped upper side .
2. The flash mold according to claim 1, wherein the cylindrical portion of the sealing plate is notched by a longitudinal groove to form a tongue-like body, and the protrusion is formed on the inner surface side of the tongue-like body. Attachment mechanism of sprinkler head and sealing plate.
2. The attachment mechanism between a flash-type sprinkler head and a sealing plate according to claim 1, wherein the protrusion is provided on the inner periphery of the cylindrical portion of the sealing plate so as to project spirally.
2. The flash sprinkler according to claim 1, wherein a flange-shaped flange portion extending outward is provided at a lower end of the cylindrical portion of the sealing plate, and a cover plate is connected to the flange portion. Attachment mechanism of head and sealing plate.
2. The flash mold according to claim 1, wherein a flange-shaped flange portion extending outward is provided at a lower end of the cylindrical portion of the sealing plate, and an impact protection member is installed on the flange portion. Attachment mechanism of sprinkler head and sealing plate.

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