JP2016106656A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head in which a pin supporting a deflector does not prevent action of a lever of a thermosensitive decomposition part, and which can reduce time and effort during construction.SOLUTION: There are included: a body 1 connected to a water supply piping P and provided with a nozzle 11 in the inside; a valve 2 blocking an outlet of the nozzle 11; a thermosensitive decomposition part 3 supporting the valve 2 and decomposed by heat upon fire; and a cylindrical member 4 installed outside the body 1. A pair of step parts 17 for engaging a lever 31 of the thermosensitive decomposition part 3 are formed in a bottom edge inner peripheral part of the body 1. A pin 44 is inserted into a hole 42 installed inside the cylindrical member 4, in parallel to a central axis of the nozzle 11, and a deflector 5 which scatters to all directions by colliding water discharged from the nozzle 11 is installed on a bottom edge of the pin 44. A position of the step part 17 and a position of the pin 44 are arranged so as not to be overlapped when viewed from an end side of the nozzle 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fire-extinguishing sprinkler head installed in a building and a protective cap for protecting the sprinkler head 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 part supports a valve for closing the nozzle. On the extension of the discharge direction of the nozzle, a deflector that scatters the fire extinguishing liquid discharged from the nozzle around 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 that has been pressed and supported by the thermal decomposition unit loses its supporting force, receives the water pressure in the piping, and is detached from the valve seat and falls off the outside 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.

As an example of the sprinkler head, there is a conshielded sprinkler head described in Patent Document 1. The sprinkler head 100 of Patent Document 1 shown in FIG. 9 has a watering portion including a deflector 101, a ring 104, a pin 106, and the like installed on the housing 102 side. The watering portion is always covered and concealed by a disk-shaped cover plate 107. Has been. In the event of a fire, the cover plate 107 falls off and the sprinkling part protrudes and moves indoors. Subsequently, the thermal decomposition unit is activated, the nozzle is opened, and water is sprayed into the room.

When the thermal decomposition unit is operated, the pair of levers 105 are pivoted so that the lower ends of the pair of levers 105 are separated from each other and fall off from the main body 103. At this time, the levers 105 may be moored in a state of being caught by the ring 104. . In this case, the hooked lever 105 may hinder running water and a predetermined watering performance may not be obtained.

JP 2003-339901 A

In view of the above problems, an object of the present invention is to provide a sprinkler head in which the support member of the deflector does not hinder the operation of the lever of the thermal decomposition unit.

In order to achieve the above object, the present invention provides the following sprinkler head.
That is, a main body that is connected to the water supply pipe and has a nozzle inside, a valve that closes the outlet of the nozzle, a heat-sensitive decomposition section that supports the valve and that is decomposed by heat in the event of a fire, and an outside of the main body A sprinkler head having a cylindrical member to be installed, and a pair of stepped portions for locking a lever of the thermal decomposition unit is formed on the inner peripheral portion of the lower end of the main body, and is installed inside the cylindrical member A pin is inserted through the hole in parallel with the central axis of the nozzle, and a deflector is installed at the lower end of the pin to collide the water discharged from the nozzle and scatter it in all directions. This is a sprinkler head in which the position of the portion and the position of the pin are arranged without overlapping.

  According to this, since the pin for supporting the deflector installed inside the cylindrical member and the hole through which the pin is inserted are installed at a position away from the lever of the thermal decomposition unit installed in the main body, the thermal decomposition unit There is nothing that hinders the operation of the lever when the is operated, and the lever can be dropped to the outside.

A plurality of holes through which the pins are inserted can be formed on a single straight line parallel to the central axis of the nozzle. When the water discharged from the nozzle is turbulent, the deflector and the pin may vibrate with that momentum, and the water spray performance may not be stable. By providing a plurality of holes through which the pins are inserted, the inner periphery of each hole supports the side surface of the pin to suppress vibration, and the pin can be maintained substantially parallel to the central axis of the nozzle, thereby preventing disturbance. The influence on the watering performance by the flow can be suppressed. Further, the hole through which the pin is inserted can be formed by drilling a support portion formed by cutting out a part of the peripheral surface of the cylindrical member and bending it inward.

The cylindrical member can be formed into a pipe shape by rounding a plate material. In addition, the diameter of the lower side of the cylindrical member can be increased, and a hole through which the pin is inserted can be installed in the expanded diameter portion. In this case, if the opening is provided above the hole through which the pin is inserted, the pin can be inserted from the opening into the hole.

The upper side of the cylindrical member is connected to the main body, and the hole is provided on the lower side. The main body and the cylindrical member can be connected and fixed by inserting an engagement pin through a hole formed in the outer peripheral surface of the cylindrical member and the side surface of the main body. At this time, the engaging pin protruding outside from the cylindrical member can be used as a tool engaging portion, and the tool can be engaged here and the screw formed on the main body can be fastened to the screw on the water supply pipe side.

Alternatively, as another connection structure, a groove or a hole is formed on the side surface of the main body, and the cylindrical member is deformed and fixed in the direction of the groove or the hole by applying a load to the position from the outer peripheral surface of the cylindrical member. Is also possible.

Further, in addition to the above-described configuration, a cover plate that is disposed close to the ceiling surface and covers the main body and the deflector, and a cylindrical retainer that is connected to the cover plate by a low-melting-point alloy are provided. It can be configured to be engageable with the member. Thus, a conshielded sprinkler head can be configured.

According to the present invention described above, it is possible to realize a sprinkler head in which a pin or a support part which is a support member of the deflector does not hinder the operation of the lever of the thermal decomposition part.

Sectional drawing of the sprinkler head of this invention. XX sectional drawing of FIG. YY sectional drawing of FIG. The exploded perspective view of a link. Sectional drawing which installed the cover plate in the sprinkler head of FIG. The expanded view of the cylinder member of the modification 1. FIG. The top view of the sprinkler head provided with the main body of the modification 2. FIG. Sectional drawing of the sprinkler head provided with the cylindrical member of the modification 3. FIG. Sectional drawing of the conventional sprinkler head.

The sprinkler head SH of the present invention includes a main body 1, a valve 2, a thermal decomposition unit 3, a tubular member 4, and a deflector 5.

The main body 1 has a cylindrical shape, and a nozzle 11 is formed inside. A male screw 12 for connecting to the water supply pipe P is formed on the outside upper side. The lower side of the male screw 12 is a collar portion 13 extended to the outside. The outer cross section of the flange 13 has a shape in which a circle is cut by two parallel straight lines, and two flat surfaces 13A and 13A are formed on the side surface of the flange 13. A hole is formed in the projecting portion 14 projecting outward from the flat surface 13A, and the locking pin 15 is inserted therethrough.

The inside of the collar portion 13 is hollow, and the end of the nozzle 11 is a valve seat 16. A pair of stepped portions 17 are formed at opposing positions on the side surface inside the collar portion 13. A lever 31 of the thermal decomposition unit 3 is engaged with the stepped portion 17. In the present embodiment, as shown in FIG. 3, the protruding portion 14 is installed at a position rotated 90 degrees with respect to the position of the stepped portion 17 when viewed from the end side of the nozzle 11.

The valve 2 closes the nozzle 11 and is normally seated on the valve seat 16. A disc-shaped saddle 21 is installed below the valve 2, and the peripheral edge of the saddle 21 is placed on a lever 31.

A female screw 22 is screwed into the center of the saddle 21. A compression screw 23 is screwed into the female screw 22, and the tip of the compression screw 23 is moved to the valve 2 side to press the valve 2 against the valve seat 16 and close the nozzle 11.

The thermal decomposition unit 3 includes a pair of levers 31 and 31 and a link 32. The lever 31 is formed by bending a plate material into a substantially L shape, and the upper end is engaged with the step portion 17 of the main body 1. A link 32 is engaged with the lower end.

As shown in FIG. 4, the link 32 is formed by bonding two thin metal plates 32A together with a low melting point alloy. The metal plate 32A is substantially U-shaped, and a rectangular hole is formed in the center when the two sheets are bonded together. The lever 31 is engaged with the edge 32B of the hole.

When the low melting point alloy between the two metal plates 32A is melted by the heat of the fire, the lower ends of the levers 31 rotate in directions away from each other, and the thermal decomposition unit 3 is decomposed. An example of the structure of the lever and the link is disclosed in Japanese Patent Application Laid-Open No. 2007-301183.

The cylindrical member 4 accommodates the flange 13 of the main body 1 on the upper side, and a deflector 5 is installed on the lower side. On the upper side of the cylindrical member 4, a hole is formed at a position corresponding to the protruding portion 14 of the main body 1, and the locking pin 15 is inserted in a state where the collar portion 13 is accommodated in the cylindrical member 4. Thereby, the main body 1 and the cylindrical member 4 are fixedly installed and are in a state where they can be rotated. The locking pin 15 can engage a tool when the male screw 12 of the main body 1 is screwed into the water supply pipe P, and functions as a tool engaging portion.

As shown in FIG. 3, an opening 40 is partially formed between the inner periphery of the cylindrical member 4 and the outer periphery of the main body 1. In the event of a fire, the hot air current passes through the opening 40 and the flow of the air current inside the cylindrical member 4 is promoted.

On the lower side of the cylindrical member 4, support portions 41 </ b> A and 41 </ b> B are formed by bending the side surfaces inward. The support portions 41A and 41B are provided in two upper and lower stages, and holes 42 and 43 are formed, respectively.

A pin 44 is inserted into the holes 42 and 43. A step 45 is formed on the upper end side of the pin 44, and the step 45 can be engaged with the support portion 41A. The lower end of the pin 44 is joined to the deflector 5. The pin 44 is guided by the holes 42 and 43 and can slide up and down. By providing the holes 42 and 43, the swinging operation of the pin 44 and the deflector 5 due to turbulent flow can be prevented, and stable watering performance can be obtained.

The deflector 5 has a disk shape, and a groove or a hole (not shown) is formed on the peripheral edge. A portion that engages with the pin 44 is formed to protrude outward. An example of the structure of the deflector 5 is disclosed in Japanese Patent Application Laid-Open No. 2012-80961.

The sprinkler head SH having the above structure is connected to a water supply pipe P provided on the back of the ceiling as shown in FIG. After connecting to the water supply pipe P, the cover plate 6 is installed so that the deflector 5 of the sprinkler head SH and the like cannot be seen from the indoor side.

The cover plate 6 has a disk shape, and a lower surface disposed on the indoor side is subjected to a surface treatment such as painting or plating as a decorative surface. The upper surface is joined to a cylindrical retainer 62 by a low melting point alloy 61. As the low melting point alloy 61, an alloy having a lower melting point than the low melting point alloy used for the link 32 is used.

The retainer 62 has a connection portion 63 formed with the cover plate 6 at the lower end. The retainer 62 can be engaged with the tubular member 4, and an engagement structure is provided on the side surface of the tubular member 4 and the side surface of the retainer 62. Examples of the engagement structure include those described in Japanese Patent Application Laid-Open Nos. 2011-218062 and 2012-40166. The retainer 62 is engaged with the tubular member 4 after the sprinkler head SH is connected to the water supply pipe P and the ceiling board C is installed. At that time, the deflector 5 is placed on the cover plate 6, and the pin 44 is guided by the holes 42 and 43 and moves upward.

According to the sprinkler head SH of the present invention, the position of the main body 1 on which the lever 31 is locked and the cylindrical member 4 on which the pin 44 is installed is fixed by the locking pin 15. As shown in FIG. The position of the lever 31 and the position of the pin 44 are arranged so as not to overlap each other when viewed from the end side of the pin. The lever 31 and the pin 44 are separated from each other, and the pin 44 and the lever 31 are prevented from interfering with each other during the rotation of the lever 31 when the thermal decomposition unit 3 is operated.

Further, the locking pin 15 can be used as a tool engaging portion, and the main body 1 is rotated by engaging the tool here, and the male screw 12 is fastened to the female screw of the water supply pipe P. it can.

Modification 1 (FIG. 6)
FIG. 6 is a development view of the cylindrical member 4, and the cylindrical member 4 is formed by rounding a flat plate. Specifically, the shape of the support portion 41 and the uneven structure 71 of the joint portion at both ends are formed in a flat plate state, the flat plate is rounded and the uneven structure 71 is fitted, and the support portion 41 is further bent inward. Thereby, the manufacturing process of the cylinder member 4 can be simplified.

Modification 2 (FIG. 7)
A main body 10 shown in FIG. 7 has three engaging pins 15 installed therein. The main body 10 has a shape in which a side surface between the engaging pin 15 and the engaging pin 15 adjacent thereto is recessed inward. Thereby, the main body 10 is lighter than the main body 1.

Modification 3 (FIG. 8)
FIG. 8 is an enlarged view of the lower side of the cylindrical member 4. Support portions 41A and 41B are installed in the enlarged diameter portion, and a pin 44 is inserted therethrough. An opening 47 is provided above the pin 44, and the pin 44 can be inserted into the holes 42 and 43 from the opening 47. After the pin 44 is inserted into the holes 42 and 43, the lower end of the pin 44 is joined to the deflector 5.

Moreover, about the fixing structure of the upper side of the cylindrical member 4 and the main body 1, the lateral groove 18 is engraved in the side surface of the collar part 13, and the outer peripheral surface of the cylindrical member 4 is pressed and deformed toward the lateral groove 18. Thus, the lateral groove 18 and the cylindrical member 4 are engaged.

1, 10 body
Two valves
3 Thermal decomposition section
4 cylinder members
5 Deflector
6 Cover plate
11 nozzles
12 Male screws
14 Protrusion
15 engaging pin
17 steps
31 lever
32 links
40 openings
41A, 41B support part
42, 43 holes
44 pins
45 steps
47 opening
61 Low melting point alloy
62 Retainer

Claims (9)

A main body connected to the water supply pipe and provided with a nozzle inside;
A valve that closes the outlet of the nozzle;
A thermal decomposition part that supports the valve and decomposes by heat in the event of a fire;
A tube member installed outside the main body, and a sprinkler head,
A pair of stepped portions for locking the lever of the thermal decomposition portion is formed on the inner periphery of the lower end of the main body,
In the hole installed inside the cylindrical member, a pin is inserted parallel to the central axis of the nozzle, and at the lower end of the pin is installed a deflector that collides water released from the nozzle and scatters it in all directions.
A sprinkler head characterized in that the position of the stepped portion and the position of the pin are arranged so as not to overlap each other when viewed from the end side of the nozzle. The sprinkler head according to claim 1, wherein a plurality of the holes are formed on a single straight line parallel to the central axis of the nozzle. 3. The sprinkler head according to claim 1, wherein the hole is formed in a support portion formed by cutting out a part of the cylindrical member and bending the hole inward. The sprinkler head according to any one of claims 1 to 3, wherein a diameter of a lower side of the cylindrical member is increased, and the hole is provided in the expanded diameter portion. The sprinkler head according to claim 4, wherein an opening is provided above the hole in the cylindrical member. The sprinkler head according to any one of claims 1 to 5, wherein the cylindrical member is formed in a pipe shape by rounding a plate material. The sprinkler head according to any one of claims 1 to 6, wherein a screw for connecting to a water supply pipe is formed on the main body, and a tool engaging portion is provided on a side surface of the main body. The sprinkler head according to claim 7, wherein the tool engaging portion is an engaging pin that is inserted through a hole formed in an outer peripheral surface of the cylindrical member and a side surface of the main body. A cover plate disposed close to the ceiling surface and covering the main body and the deflector, and a cylindrical retainer connected to the cover plate by a low melting point alloy, the retainer being engageable with the cylindrical member. Item 9. The sprinkler head according to any one of Items 1 to 8.

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