JP2016077395A - Protective cap for sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cap for a sprinkler head in which the mounting to piping is possible in a state of the protective cap mounted on the sprinkler head when miniaturizing the sprinkler head.SOLUTION: A protective cap 10 is provided for mounting a sprinkler head 30 including: a body 33 connected to a water supply pipe W and provided with a nozzle 33a inside, and including a tool engagement part engaged with a fastening tool 50 in the side surface; a deflector 31 installed in the water discharge direction of the nozzle 33a; and a support cup 32 installed the outside body 33 and engaged with an accessory 60. The protective cap includes a bottom face 11 for protecting the deflector 31, an extension part 12 extended from bottom face 11 to a tool engagement part of the body 33, and a protection part 13 for covering the lower part of the support cup 32.SELECTED DRAWING: Figure 2

Description

The present invention relates to a protective cap for protecting a fire-extinguishing sprinkler head installed in a building from external impacts.

The sprinkler head is installed on the ceiling or wall in the building. The sprinkler head has a nozzle that can be connected to a pipe installed on the back of the ceiling or the inside of the wall on one end side, and a thermal decomposition section is provided on the other end side. During normal times, the thermal decomposition unit supports a valve body that closes the nozzle. On the extension of the discharge direction of the nozzle, a deflector for scattering water discharged from the nozzle to the surroundings is provided.

In such a conventional sprinkler head, when a fire occurs, first, the thermal decomposition section is decomposed by the heat of the fire. The valve body that has been pressed and supported by the thermal decomposition unit loses its supporting force, receives the water pressure in the pipe, and is detached from the valve seat, and falls out of the main body. The water in the pipe is discharged from the open nozzle, and the discharged water collides with the deflector and scatters to the surroundings to extinguish the fire.

In order to protect the sprinkler head from external impacts during transportation and construction, a protective cap is attached to the sprinkler head until construction is completed. Further, the protective cap has an action of preventing repair materials such as dust, paint, and putty during construction from adhering to the sprinkler head.

As an example of the sprinkler head, there is a conshielded sprinkler head described in Patent Document 1. In the sprinkler head of Patent Document 1, a sprinkler unit including a deflector, a pin, and the like is installed in a cylindrical housing installed outside the main body. The watering part is always covered with a disc-shaped cover plate installed at the lower end of the housing. In the event of a fire, the cover plate falls off and the water sprinkling part protrudes and moves to the indoor side. Subsequently, the sprinkler head is actuated to open the nozzle and spray water into the room.

When the above conshielded sprinkler head is downsized, there are merits such as improvement in design and weight reduction. On the other hand, however, there is a concern that the downsizing may make the handling during construction inconvenient. Specifically, as in the case of the conshielded sprinkler head of Patent Document 2, in the past, a tool could be hung on the wrench engaging part inside the support cup with the protective cap attached, but the support was reduced by downsizing. When the degree of integration of the components inside the cup increases, it may be difficult to engage the tool with the wrench engaging portion with the protective cap attached.

JP 2003-339901 A JP 2013-240468 A

In view of the above problems, an object of the present invention is to provide a protective cap for a sprinkler head that can be attached to a pipe with the protective cap mounted on the sprinkler head when the sprinkler head is downsized.

In order to achieve the above object, the present invention provides the following protective cap for a sprinkler head.
That is, it is connected to the water supply pipe, the nozzle is provided inside, the side with the tool engaging part that engages with the fastening tool, the deflector installed in the water discharge direction of the nozzle, and installed outside the body A support cup to which the accessory is engaged, and a protective cap attached to the sprinkler head, the bottom surface protecting the deflector, and the extending portion extending from the bottom surface to the tool engaging portion of the main body The sprinkler head protective cap includes a protective portion that covers the lower portion of the support cup.

According to this, the protective cap for the sprinkler head (hereinafter referred to as “protective cap”) is configured such as a deflector or a thermal decomposition part disposed inside the support cup by inserting the tool inside the extension part. Interference with parts can be avoided. Moreover, since the extending part extends to the tool engaging part of the main body, the tool can be surely guided to the tool engaging part by inserting the tool through the extending part, and a beginner who has never worked But you can understand how to use it intuitively.

Since most of the components of the sprinkler head are arranged inside the support cup, the components inside the support cup can be protected from external impacts by covering the lower part of the support cup with the bottom surface and the protection part. In addition, adhesion of paint and dust to the above-described components can be prevented.

In addition to the above configuration, the upper portion of the extension portion can be engaged with the edge of the hole provided in the upper end surface of the support cup. Accordingly, the protective cap can be supported on the support cup for a long period of time, and the protective cap can be prevented from falling off during transportation or construction. Further, the same effect can be obtained by engaging the extension part or the protection part with a groove or a protrusion formed on the side surface of the support cup.

Furthermore, if the extension part has flexibility, only the protection part can be rotated in a state where the upper part of the extension part is in contact with the tool engagement part or the support cup. Specifically, a cutout or an opening can be provided in the extending portion so that it can be easily elastically deformed. By rotating only the protective part, the putty can be peeled off by rotating the protective part when the putty adheres to the protective part or the bottom surface.

Further, when the tip of the extension part is configured to contact the lower end of the tool engagement part of the main body, the tool can be directly engaged with the tool engagement part of the main body, Clearance can be reduced.

Furthermore, the extension part is formed between a plurality of pins installed on the deflector, and the upper end of the pin is suspended from the engagement part installed on the inner peripheral part of the support cup. Interference with pins can be prevented.

According to the present invention, when the sprinkler head is downsized, it is possible to realize the sprinkler head protective cap that can be attached to the pipe in a state where the protective cap is attached to the sprinkler head.

Sectional drawing of the state which mounted | wore the sprinkler head with the protective cap of this invention. AA sectional drawing of FIG. BB sectional drawing of FIG. 1 (except a protective cap). The perspective view (partial cross section) of a protective cap. AA sectional drawing of only a protective cap. Sectional drawing of the state which inserted the tool in the protective cap. Sectional drawing of the state which attached the sprinkler head cover to the sprinkler head. Sectional drawing of the modification in which an extension part engages with the groove | channel or protrusion formed in the sprinkler head. Sectional drawing of the modification which a protection part engages with the groove | channel or protrusion formed in the side surface of a support cup. Sectional drawing of the modification which the upper part of an extension part engages with the edge of the hole provided in the upper end surface of a support cup.

  The protective cap of this invention is demonstrated with reference to FIGS. The protective cap 10 of the present invention is attached to the sprinkler head 30.

The protective cap 10 includes a bottom surface 11, an extension portion 12, and a protection portion 13. The bottom surface 11 has a disk shape, and the deflector 31 of the sprinkler head 30 is placed on the top surface. The outer diameter of the bottom surface 11 is larger than the outer diameter dimension of the deflector 31.

The extending portion 12 is formed to extend upward from the bottom surface 11 in the figure. The extending portion 12 has a cylindrical shape and is formed through the bottom surface 11. The tip 51 of the tool 50 can be inserted into the extension portion 12.

The cross-sectional shape of the extending portion 12 is a shape in which both ends of the arc are connected by a straight line. In the two extending portions 12, planes 12 a having a linear cross section are arranged facing each other in parallel. The main body 33 and the thermal decomposition part 34 of the sprinkler head 30 are accommodated between the two extending parts 12, and the flat part 33c on the side surface of the main body 33 abuts on the flat surface 12a. On the other hand, the curved surface 12 b in which the cross section of the extending portion 12 has an arc shape is disposed along the inner peripheral surface of the support cup 32.

The upper end of the extension part 12 is formed so as to protrude at the same height as or higher than the upper end of the support cup 32. In the present embodiment, a hole 32b having substantially the same shape as the cross-sectional shape of the extending portion 12 is formed in a flat surface 32a formed at the upper end of the support cup 32, and the upper end of the extending portion 12 is formed at the edge of the hole 32b. Mated or locked.

As shown in FIG. 5, when the portion indicated by the two-dot chain line of the extending portion 12 is notched, the extending portion 12 can be easily elastically deformed and can be flexible. Due to the flexibility, the protection part 30 can be rotated in a state where the tip of the extension part 12 is in contact with the flat part 33c.

The protection part 13 has an annular shape and is formed along the edge of the bottom surface 11. A step 13 a is formed on the inner peripheral surface of the protection part 13, and the lower end of the support cup 32 is placed on the step 13 a. By doing so, the lower part of the support cup 32 is covered with a portion above the step part 13 a of the protection part 13, thereby preventing the paint and the repair material from adhering to the support cup 32.

The sprinkler head 30 has a hollow nozzle 33a inside the main body 33,
A male screw 33b for connecting to the water supply pipe is formed on one end of the outside. The outer peripheral shape on the other end side is rectangular and has four flat portions 33c. The flat portion 33c can be held by the tool 50, and the male screw 33b can be screwed into the water supply pipe for connection.

The inside of the flat portion 33c is an outlet of the nozzle 33a, and the outlet of the nozzle 33a is closed by a valve (not shown). On the lower end side from the outlet of the nozzle 33 a, levers 34 a and 34 a of the thermal decomposition unit 34 that supports the valve are locked to the main body 33. Further, a link 34b is engaged with the lower ends of the two levers 34a. The internal structure of the main body 33 and the detailed structure of the valve and the thermal decomposition part 34 are substantially the same as the structure described in US Pat. No. 7,275,603, and are different from the gist of the present invention, so a detailed description is omitted. To do.

A cylindrical support cup 32 is installed at the boundary between the male screw 33b and the flat portion 33c. The support cup 32 has a flat surface 32a at the upper end, and has a hole through which the male screw 33b can be inserted at the center of the flat surface 32a. The male screw 33b is inserted into the hole, and the flat surface 32a is placed on the upper end surface of the flat surface portion 33c and fixed. At this time, it arrange | positions so that the surface of the plane part 33c of the main body 33 may follow the linear part of the edge of the above-mentioned hole 32b (it shows with a dotted line in FIG. 3) formed in the plane 32a. By doing so, the flat surface 12a of the extending portion 12 and the flat surface portion 33c of the main body 33 can be arranged to face each other.

A support portion 32 c that supports the deflector 31 is provided on the inner peripheral surface of the support cup 32. The support portion 32c is formed by cutting out a part of the side surface of the support cup 32 and bending it inward. A hole is formed in the support portion 32c.

Grooves and protrusions for connecting accessories are formed on the outer peripheral surface or inner peripheral surface of the support cup 32, and in this embodiment, a spiral groove 32d is formed. Examples of the accessories include a sprinkler head cover and a sealing plate described in International Publication No. 2011/125169. The cylindrical portion of the sprinkler head or sealing plate can be engaged with a groove or protrusion formed on the outer peripheral surface or inner peripheral surface of the support cup 32.

In FIG. 7, a sprinkler head cover 60 is installed as an accessory, and a plurality of claws 62 are formed on the cylindrical portion 61. The claw 62 can be engaged with the spiral groove 32d. A cover plate 63 is installed below the tubular portion 61, and a plurality of legs for joining the cover plate 63 with the low melting point alloy 64 are formed at the lower end of the tubular portion 61.

The deflector 31 is installed in the direction of water discharge of the nozzle 33a, and collides the water discharged from the nozzle 33a and scatters it in all directions. The shape of the deflector 31 is plate-like, and has a disk part 31a disposed on the axis of the nozzle 33a and wings 31b and 31b formed protruding from the edge thereof as shown by a two-dot chain line in FIG. Holes are formed in the wings 31b, and the lower ends of the pins 31c are connected to the holes.

The pin 31 c has a ridge at the upper end, and is inserted into the hole of the inner support portion 32 c of the support cup 32 before the lower end is connected to the deflector 31. The pin 31c is guided by the hole of the support part 32c and can move up and down in the support cup 32. The hook part is locked to the support part 32c, and the deflector 31 is suspended from the support cup 32 via the pin 31c. can do.

In the sprinkler head 30, the deflector 31 is separated from the main body 33 and installed in the support cup 32. Therefore, the main body 33 is downsized and the outer diameter of the support cup 32 is also small. The structure of the support cup 32 is complicated by installing the deflector 31 in the support cup 32, and it is difficult to install the conventional cylindrical protective cap by fitting it into the support cup 32. Then, the tool 50 is guided by the extension part 12 to prevent interference with the deflector 31, the pin 31 c, the thermal decomposition part 34, and the like disposed inside the support cup 32.

In the above embodiment, the sprinkler head having the structure in which the deflector 31 and the pin 31c are provided in the support cup 32 has been described. However, the present invention is not limited thereto, and the sprinkler having the structure in which the engaging portion of the pin 31c is provided outside the main body 33. The protective cap 10 can also be applied to the head.

Then, the construction procedure of the sprinkler head equipped with the protective cap of the present invention will be described.

As shown in FIGS. 1 and 2, the protective cap is attached to the sprinkler head 30. First, the tip 51 of the tool 50 is inserted into the extended portion 12 of the protective cap 10 from the bottom surface 11 side (see FIG. 6). Then, the tip 51 of the tool 50 engages with the flat portion 33c of the main body 33, and the tool 50 and the main body 33 can be rotated.

Next, the male screw 33 b is connected to the end of the water supply pipe W. The tool 50 is rotated and screwed into the female screw at the end of the water supply pipe W and tightened with a predetermined torque. The tool 50 is pulled out from the extending portion 12.

In the above description, the male screw 33b is screwed into the water supply pipe W after the tool 50 is inserted into the protective cap 10, but apart from this, the sprinkler head 30 is first held by hand and the male screw 33b is inserted into the water supply pipe W. After the screw is screwed to some extent, the tool 50 can be inserted through the protective cap 10 and further screwed into the water supply pipe W.

The protective cap 10 is attached to the sprinkler head 30 until the installation of the ceiling board C is completed, and protects the sprinkler head 30 from external impact, dust, paint, and the like.

In the next step, the ceiling board C is installed. The ceiling board C is provided with a hole H through which the sprinkler head 30 is inserted into the room. The hole H may be drilled in the ceiling board at the site, and the position of the hole may be shifted at that time, or the hole may be excessively opened. At that time, the hole H is filled with the putty P for repair, but the putty P may adhere to the outside of the protective cap 10 and solidify as it is.

Next, spray the ceiling surface. At this time, the paint 12 is prevented from adhering to the sprinkler head 30 by the extended portion 12 and the protective portion 13 of the protective cap 10. This completes the ceiling board installation process.

When the ceiling board C is installed, the next operation is to pull out the protective cap 10 from the sprinkler head 30 and attach the sprinkler head cover 60 as an accessory to the sprinkler head 30.

When pulling out the protective cap 10, the putty P attached to the protective cap 10 must be pulled out while peeling off. Specifically, the putty P attached thereto can be peeled by moving the protective cap 10 downward while gradually rotating. At this time, if the extended portion 12 has flexibility, the protective portion 13 of the protective cap 10 can be rotated with the upper end side of the extended portion 12 engaged with the sprinkler head 30.

When the protective cap 10 is pulled out, the sprinkler head cover 60 is engaged with the support cup 32. More specifically, the claw 62 formed on the cylindrical portion 61 of the sprinkler head cover 60 is engaged with the spiral groove 32 d of the support cup 32. The operation is completed by adjusting the cover plate 63 of the sprinkler head cover 60 to a position close to the lower surface of the ceiling.

According to the protective cap 10, even when the sprinkler head 30 is downsized, the protective cap 10 can be connected to the water supply pipe W with the sprinkler head 30 attached. In addition, by forming the extending portion 12 up to the upper end surface of the support cup 32, the coating material can be prevented from adhering to the deflector 31 and the thermal decomposition portion 34 installed inside the protective cap 10.

Modification (FIGS. 8 to 10)
A modification of the protective cap 10 shown above will be described. In FIG. 8, a protrusion 12 </ b> C that engages with a spiral groove 32 d formed on the side surface of the support cup 32 is provided on the curved surface 12 b of the extending portion 12. Thereby, the protective cap 10 can be supported by the support cup 32 for a long period of time, and the protective cap 10 can be prevented from falling off during transportation or construction. Similarly, a protrusion 12 d that engages with a groove 33 e carved in the flat surface portion 33 c of the main body 33 can be formed on the flat surface 12 a of the extending portion 12.

In FIG. 9, a protrusion 13 b that engages with the spiral groove 32 d of the support cup 32 is provided on the inner peripheral side of the protection portion 13. Further, in FIG. 10, a protrusion 12 e that engages with an edge of a hole 32 b provided in a flat surface 32 a at the upper end of the support cup 32 is provided on the upper surface of the curved surface 12 b of the extending portion 12. With these configurations, the same effects as described above can be obtained.

On the other hand, the tip of the flat surface 12 a of the extending portion 12 in FIG. 10 is in contact with the lower end of the flat surface portion 33 c that is a tool engaging portion of the main body 33. Thereby, the tool 50 can be directly engaged with the plane part 33c, and the clearance between the tool 50 and the plane part 33c can be reduced.

DESCRIPTION OF SYMBOLS 10 Protective cap 11 Bottom surface 12 Extension part 13 Protection part 30 Sprinkler head 31 Deflector 32 Support cup 33 Main body 34 Thermal decomposition part 50 Tool 60 Sprinkler head cover (accessory)

Claims (7)

A main body provided with a tool engaging portion which is connected to a water supply pipe and has a nozzle provided therein and engages a fastening tool on a side surface;
A deflector installed in the water discharge direction of the nozzle,
A support cup that is installed outside the main body and to which an accessory is engaged, and a protective cap that is attached to a sprinkler head,
The bottom surface protecting the deflector;
An extending part extending from the bottom surface to the tool engaging part of the main body,
A protective cap for a sprinkler head, comprising a protective portion that covers the lower portion of the support cup. The sprinkler head protective cap according to claim 1, wherein an upper portion of the extending portion engages with an edge of a hole provided in an upper end surface of the support cup. The sprinkler head protective cap according to claim 1 or 2, wherein the extension portion engages with a groove or a protrusion formed on a side surface of the support cup. The sprinkler head protective cap according to any one of claims 1 to 3, wherein the protective portion engages with a groove or a protrusion formed on a side surface of the support cup. The protective cap for sprinkler heads according to any one of claims 1 to 4, wherein the extending portion has flexibility. The sprinkler head protective cap according to any one of claims 1 to 5, wherein a distal end of the extending portion contacts a lower end of a tool engaging portion of the main body. The extension part is formed between a plurality of pins installed in the deflector, and the upper end of the pin is suspended from an engagement part installed in the inner peripheral part of the support cup. Protective cap for sprinkler head according to item.

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