JP2544161Y2 - Sprinkler head - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application field] The present invention relates to a sprinkler head,
More specifically, the present invention relates to an improvement of a sprinkler head for discharging fire extinguishing water when a fire occurs.

[0002]

2. Description of the Related Art Conventionally, as this kind of sprinkler head, for example, there is one disclosed in Japanese Patent Application No. 1-18074 by the present applicant.

As shown in FIG. 8, this conventional device is provided with a partially notched ring-shaped locking member 11 below the plug 3 as a means for maintaining the water outlet 4 of the sprinkler head main body 1 in a water-stop state. A pair of upper and lower holding bodies 1 which are held in an expanded state in which a part thereof is exposed to the outside by the tightening force of the screw body 29.
2 and 13 are arranged, and a washer-shaped spring 30 that presses and urges the plug 3 upward is interposed between the upper holding body 12 and the plug 3.

Further, the pair of holding bodies 12 and 13 are fixed by engaging the locking body 11 sandwiched between the holding bodies 12 and 13 in an expanded state with an inward engagement formed on a lower inner peripheral edge of a frame 24. It is carried out by engaging with the upper tapered surface 31 of the joint 16.

When a fire occurs, the screw 2
9, the fusible body 22 interposed between both the flange portion 29a and the lower holding body 13 is melted, so that the holding force of the holding bodies 12, 13 with respect to the locking body 11 is loosened. Can be reduced by its elastic restoring force. As a result, the engagement between the locking body 11 and the inward engagement portion 16 is released, and the holding bodies 12 and 13 are released.
The plug 3 and the like drop off from the head main body 1 and the ring 32 at the tip of the deflector 8 connected to the plug 3 is engaged and held by the inwardly protruding portion 16 of the frame 24 to appropriately spray water for fire extinguishing water. It is what we do.

[0006]

However, in the above-mentioned prior art, a pair of holding members 12, 13 and a frame 2 are provided.
The locking member 11 is formed by the tapered surface 31 of the inward convex portion 16 of FIG.
Therefore, when an external impact is applied to the lower end of the frame 24, the locking state of the locking body 11 cannot be maintained, so that the locking body 11 separates and moves along the tapered surface 31 of the inward convex portion 16. As a result, the plug 3 and the like fall inadvertently to sprinkle fire extinguishing water.

[0007] Further, even when assembling the sprinkler head, since the locking member 11 is easily detached, it is not suitable for so-called automatic assembling, and has to be assembled manually.

[0008] Therefore, the present invention does not operate inadvertently even if a slight impact is applied to the sprinkler head. It is an issue.

[0009]

That is, in order to solve the above-mentioned problems, the present invention is directed to the lower portion of a frame 24 provided on the sprinkler head main body 1 and the flange portions 12d and 13b of a pair of upper and lower holding members 12 and 13. Inward projection 1 protruding from the periphery
6. The outlet 4 of the sprinkler head main body 1 is closed by the plug 3 by holding the ring-shaped or partially cut-out ring-shaped expandable / contractible locking member 11 in an expanded state between the three members 6 and 6;
In addition, the locking body 11 is contracted so that the stopper 3 is detached from the outflow port 4 due to the thermal melting or thermal softening of the heat-soluble fusible body 22, and the holding bodies 12 and 13 are configured to be able to drop off from the frame 24. In the sprinkler head, a wall surface 17 on which the locking body 11 is engaged and an inner wall surface 17 for preventing the locking body 11 from being detached from the wall surface 17 are provided on the inner surface of the inward convex portion 16.
This is a sprinkler head having locking projections 25a and 25b provided above and below, respectively.

[0010]

Therefore, in the sprinkler head characterized by the above-described structure, the inner surface of the inwardly protruding portion 16 of the frame 24 is provided with the wall surface 17 to which the locking body 11 can be engaged, so that the sprinkler head is in the expanded state. The locking body 11 is engaged with the wall surface 17 and the locking projections 2 provided on the upper and lower sides of the wall surface 17 are provided.
Since the locking body 11 is locked by 5a and 25b, even if a slight impact is applied to the sprinkler head, the locking body 1 is locked.
1 does not detach from the wall surface 17, so that the holding state of the locking body 11 by the holding bodies 12, 13 and the inwardly protruding portion 16 can be reliably maintained.

When the fusible member 22 is melted or softened by heat, the locking member 11 contracts, and the locking member 11 and the frame 2 are contracted.
4 is released from the frame 24, and the stopper 3 is detached from the outlet 4 of the sprinkler head main body 1 because the holding members 11 and 13 are removed from the frame 24. Then, fire extinguishing water is sprinkled from the outlet 4.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a sprinkler head body having a fire extinguishing water inflow passage 2, and a substantially cylindrical frame 24 is screwed to a lower portion of a peripheral edge of the sprinkler head body 1. . Reference numeral 3 denotes a plug for closing an outflow port 4 formed at a lower portion of the sprinkler head main body 1. A flange 5 is formed at the lower peripheral edge of the plug 3 and is formed on the inner peripheral surface. Impressed screw 1
9 is screwed in, and a hexagonal hole 19 a is formed in one end of the impress screw 19. Reference numeral 7 denotes a resilient body made of a disc spring whose surface is coated with a fluororesin, and is sandwiched between the lower end 1a of the outlet 4 of the sprinkler head main body 1 and the upper surface of the flange 5 of the plug 3.

Reference numeral 8 denotes a bent deflector connected to the outer peripheral edge of the plug 3, and a guide portion 10 slidably protruding downward from the outer peripheral surface of the sprinkler head main body 1 at the upper end thereof. The guide ring 9 is connected, and functions as a guide when the stopper 3 falls.

Reference numeral 11 denotes a resiliently deformable locking member which is formed in a partially notched ring shape and whose diameter is enlarged or reduced. 12,1
Reference numeral 3 denotes a pair of holding bodies for holding and holding the locking body 11, and a hole 12a into which a lower end of the impress screw 19 can be fitted is formed on the upper surface of the upper holding body 12, and A female screw portion 12c is engraved on the inner peripheral surface of the cylindrical portion 12b, and the cylindrical portion 13a of the lower holding body 13 is slidably slidable with the cylindrical portion 12b of the one holding body 12. It fits. Reference numerals 14 and 15 denote flange portions 12d and 1 of the holding members 12 and 13, respectively.
3b is a tapered surface formed on the outer peripheral edge portion, as shown in FIG. 3, formed so that the distance between the locking members 11 becomes smaller toward the inside so that the locking members 11 can be held in an expanded state therebetween. I have.

Reference numeral 16 denotes a frame 2 screwed to the head main body 1.
The inward convex portion formed on the inner peripheral edge of the lower end portion of 4 has a wall surface 17 on its inner surface which can engage with the locking member 11 held by the holding members 12 and 13 as shown in FIG. Along with
Locking projections 25 protruding inwardly above and below the wall surface 17.
a, 25b are continuously provided, and the inner diameter of the inwardly protruding portion 16 is formed to be larger than the holding members 12, 13.

Reference numeral 18 denotes a lock screw screwed into the female screw portion 12c of the holding body 12, and a through hole 1 is provided substantially at the center thereof.
8a is drilled. Reference numerals 20, 21 and 22 denote a flange 18b formed at the lower end of the lock screw 18 and the lower holding body 13
2 shows a heat insulating packing, a heat-sensitive body, and a soluble fusible body interposed between the lower end of the heat-insulating packing and the heat-sensitive packing. 23 is a lock screw 18
Is a cap which is detachably mounted to close the through hole 18a to prevent dust from entering the inside, and 26 is a head cover which is fitted to the lower end of the frame 24.

The present embodiment has the above-described configuration. Next, the case where this is used will be described.

First, at the time of the assembling work, as shown in FIG. 4, the sprinkler head main body 1 and the frame 24 are divided into upper and lower parts and assembled respectively. Connect.

Then, as shown in FIG.
When the hexagon wrench 27 is inserted from the through hole 18a of 8 and the hexagon wrench 27 is fitted into the hexagon hole 19a of the impress screw 19 and rotated, the impress screw 19 is lowered, and the lower surface thereof contacts the bottom surface of the concave portion 12a of the holding body 12. Will be.

Further, when the hexagon wrench 27 is rotated,
Conversely, as shown in FIG. 2B, the plug 3 is pressed and raised via the impressed screw 19, whereby the elastic body is moved between the upper surface of the flange 5 of the plug 3 and the lower end 1a of the sprinkler head main body 1. When the gap 3a having the depth B is formed in the plug 3, the elastic body 7 receives a load of about 60% of the load that is pressed and becomes horizontal, The outlet 3 of the sprinkler head main body 1 is reliably sealed by the plug 3 via the elastic body 7. After that, the cap 23 is attached to the through hole 18 a of the lock screw 18.

In this way, the assembling work of the sprinkler head can be performed very easily.
Is securely held by the holding members 12 and 13 and the inwardly protruding portion 16 of the frame 24, so that there is an advantage that a series of assembling operations does not become complicated and thus automatic assembling becomes possible.

Further, since the resilient member 7 is pressed with an appropriate load as described above, even if the resilient member 7 is left in this state for a long period of time, the resilient force of the resilient member 7 is maintained without being significantly reduced. It is done.

The sprinkler head thus obtained has a wall 17 on which the locking body 11 can be engaged on the inner surface of the inward projection 16 of the frame 24, and a locking projection on the top and bottom of the wall 17. Since the portions 25a and 25b are continuously provided, the wall surface 17 and the locking protrusions 25a and 25b are formed.
The locking member 11 is firmly and securely locked by the holding members 12 and 13 and b. Therefore, even if a slight impact is applied to the lower end portion of the frame 24 during assembly, mounting on the ceiling surface, or the like, there is no inconvenience that the locking body 11 moves and the locking state is released. It does not happen.

Next, when a fire occurs and the temperature of the heat-sensitive plate 21 rises, the fusible member 22 interposed between the heat-sensitive plate 21 and the lower flange 18b of the lock screw 18 melts or softens. As a result, as shown in FIG. 6, the lower holding body 13 is lowered and the locking body 11 is contracted, so that the engagement state with the wall surface 17 of the inward projection 16 of the frame 24 and the locking projections 25a and 25b is established. As a result, the holding members 12, 13 and the impressed screw 19, the plug 3 and the like supported by the holding members 12, 13 fall below the sprinkler head main body 1, and the outlet 4 is opened.

When the stopper 3 is dropped, the stopper 3 is provided with a guide ring 9 having a guide portion 10 via a deflector 8, so that the guide portion 10 is provided on the outer periphery of the sprinkler head main body 1. The slide 3 is guided by sliding on the surface, and the stopper 3 smoothly descends without causing runout,
The guide ring 9 is locked by the inward convex portion 16 of the frame 24, and the lowering operation of the plug 3 stops.

Further, since the elastic body 7 is pressed between the lower end portion 1a of the outlet 4 of the sprinkler head main body 1 and the elastic body 3, the elastic body 7 has a resilient force. 3 can be reliably and quickly performed, which greatly contributes to the convenience of opening the plug 3.

Then, the fire extinguishing water discharged from the outlet 4 collides with the upper surface of the plug 3 and is dispersed in four directions to be sprayed radially.

In the above embodiment, the frame 24
The wall surface 17 and the locking projection 25a are provided on the inner surface of the inward projection 16 of FIG.
25b, but as shown in FIG.
A concave portion 28 into which the locking body 11 can be fitted is provided on the inner surface of the recess 28, and a locking projection 25c is provided at the tip end of the concave portion 28 so as to prevent the locking body 11 from being detached from the concave portion 28. It does not matter.

Further, the locking body 11 is not limited to the partially notched ring shape, but may be a complete ring shape.

Further, the specific means taken to drop the holding bodies 12, 13 and the like at the time of heat is not limited to the above embodiment.

In addition, the specific structures of the plug 3, the holding members 12, 13, the lock screw 18, the impress screw 19, and the like can all be freely changed within the intended range of the present invention.

[0033]

As described above, according to the present invention, since the inner surface of the inwardly projecting portion of the frame is provided with a wall surface to which the locking member can be engaged, the flange portion of the pair of holding members and the wall surface are provided. And the locking body is provided with locking projections on the upper and lower surfaces of the wall, so that the locking body is locked by the locking projections and a slight impact is applied to the sprinkler head. Even so, the retaining body can be firmly maintained without detaching from the wall surface.

Therefore, as in the prior art in which the locking member is held by the tapered surface of the inwardly protruding portion, when the shock is slightly applied to the frame, the locking member is displaced and the stopper is accidentally dropped. An extraordinary effect of successfully preventing such inconvenience was obtained.

Further, as described above, the holding member can be securely held by the two holding members and the inwardly projecting portion of the frame, so that the assembling work of the sprinkler head can be easily performed.
Therefore, a special effect that enables automatic assembly is also achieved.

[Brief description of the drawings]

1A is a front view showing an embodiment of a sprinkler head according to the present invention, and FIG. 1B is a plan view thereof.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of a main part showing an engagement state between an inwardly protruding portion of the frame and a locking body.

FIG. 4 is a sectional view showing an assembling operation of the sprinkler head.

FIGS. 5A and 5B are enlarged cross-sectional views of a main part showing one process of assembling a sprinkler head.

FIG. 6 is a sectional view showing an operation state of the sprinkler head.

FIG. 7 is an enlarged sectional view of a main part showing another embodiment of the inwardly protruding portion of the frame.

FIG. 8 is a sectional view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sprinkler head main body 3 ... Plug body 4 ... Outflow port 11 ... Locking body 12 ... Clamping body 12d ... Flange part 13 ... Clamping body 13b ... Flange part 16 ... Inward convex part 17 ... Recessed part 22 ... Soluble body 24 ... Frame 25a , 25b, 25c ... locking projection

Claims (2)

(57) [Scope of request for utility model registration] 1. A flange 12 of a pair of upper and lower sandwiching bodies 12, 13.
A ring-shaped or partially cut-out ring-shaped scalable locking member 11 is formed between the three members d and 13b and an inwardly protruding portion 16 provided on the sprinkler head main body 1 and protruding from a lower inner peripheral edge of the frame 24. By holding the sprinkler head body 1 in the expanded state, the outlet 4 is closed by the plug 3, and the plug 3 is detached from the outlet 4 by heat melting or heat softening of the heat-soluble fusible body 22. In the sprinkler head in which the locking body 11 is contracted and the holding bodies 12 and 13 are detachable from the frame 24, a wall surface 17 with which the locking body 11 is engaged is fitted to an inner surface of the inward convex portion 16. A sprinkler head having locking projections 25a and 25b provided on the upper and lower surfaces of the wall surface 17 to prevent the locking body 11 from being detached from the wall surface 17. 2. A flange 12 of a pair of upper and lower holding bodies 12, 13.
A ring-shaped or partially cut-out ring-shaped expandable and contractable locking member 11 is formed between the three members d and 13b and an inward convex portion 16 protruding from a lower inner peripheral edge of a frame 24 provided on the sprinkler head main body 1. By holding the sprinkler head body 1 in the expanded state, the outlet 4 is closed by the plug 3, and the plug 3 is detached from the outlet 4 by heat melting or heat softening of the heat-soluble fusible body 22. In the sprinkler head in which the locking body 11 is contracted and the holding bodies 12 and 13 can be removed from the frame 24, a concave portion 28 into which the locking body 11 is fitted is formed on the inner surface of the inwardly protruding portion 16. A sprinkler head provided with a locking projection 25c at the tip of the recess 28 to prevent the locking body 11 from coming off from the recess 28.