WO2019008832A1

WO2019008832A1 - Protector for heat-sensitive breakable section of sprinkler head

Info

Publication number: WO2019008832A1
Application number: PCT/JP2018/009609
Authority: WO
Inventors: 小岩　康明
Original assignee: 千住スプリンクラー株式会社
Priority date: 2017-07-07
Filing date: 2018-03-13
Publication date: 2019-01-10
Also published as: TWM570168U

Abstract

[Problem] To provide a protector for a heat-sensitive breakable section of a sprinkler head which is detachably mounted on a sprinkler head to protect a heat-sensitive body thereof, is less likely to be precarious once installed, and prevents the heat-sensitive body from contacting the protector. [Solution] This protector 10 is designed for use in a sprinkler head S having a main body 1 with a nozzle 1A, a plurality of frame arms 2 extending from the main body 1 in the direction whereto the nozzle 1A discharges water, and a heat-sensitive body provided between the plurality of frame arms 2. The protector 10 has: an opening 19 which allows a heat-sensitive breakable section including the heat-sensitive body to be inserted into the interior of the protector; a base face 11 opposite the opening 19; a side face 12 extending from the base face 11 toward the opening 19 and passing through the vicinity of the frame arms 2; and a support part 13 provided on the side face 12 and proximally located opposite the frame arms 2. A plurality of columnar posts 14 are proximally disposed to the frame arms 2 inside the side face 12.

Description

Protector for the thermal decomposition of the sprinkler head

The present invention relates to a protector for protecting a heat-sensitive body of a sprinkler head.

The sprinkler head automatically operates in the event of a fire to spray water. At all times, the nozzle is closed by the thermal decomposition unit, and the thermal decomposition unit is disassembled to open the nozzle when the thermal decomposition member is incorporated into the thermal decomposition unit and the heat sensitive body acts by the heat of fire. The sprinkler head is equipped with a protective cap (see, for example, Patent Document 1) and a protector (see, for example, Patent Document 2) in order to protect the heat-sensitive body and the thermal decomposition unit from impact during transportation or installation.

In particular, since the frame type sprinkler head is exposed to the heat sensitive body and the heat sensitive decomposition part and is susceptible to external force, there are countries where the attachment of a protective cap or protector is specified by a standard overseas.

In the foreign countries, it is common to use a glass bulb as a heat sensitive body. The glass valve is a glass in which alcohol or the like is sealed, and the heat of the fire expands the alcohol and destroys the glass, whereby the nozzle of the sprinkler head is opened. In order to protect the glass bulb from external force, a protector is placed around the glass bulb during transportation and construction.

The protector 36 shown in FIG. 6 is provided with two

flat surfaces

38, 40 so as to sandwich the two

frame arms

70, 72 of the sprinkler head S, and the two flat surfaces are connected by the hinge surface 54. . Fasteners 60 are installed on the opposite side of the two

planes

38, 40 connected by the hinge plane 54. The glass bulb 30 can be protected from external force by locking the fastener 60 in the hole 62 with the

frame arms

70 and 72 and the glass bulb 30 sandwiched between the two

flat surfaces

38 and 40. When the application of the sprinkler head S is completed, the fasteners 60 are disengaged and the protector 36 is removed.

Japanese Patent Laid-Open No. 2002-210034 U.S. Pat. No. 6,666,111 U.S. Pat. No. 7,900,852

The protector 36 has a structure in which the

frame arms

70 and 72 are housed inside the hinge surface 54 and the fastener 60, and can be applied to many types of sprinkler heads regardless of the shape of the frame arm 70. However, if the distance between the frame arm 70 and the hinge surface 54 and the fastener 60 is too large, the protector 36 may rattle.

In addition, when a link obtained by bonding two metal plates with a low melting point alloy is installed as a heat-sensitive body instead of a glass bulb, the link protrudes to the outside from between the frame arms, If the stick is large, the protector and the link may come in contact with each other.

Therefore, in view of the above problems, it is an object of the present invention to provide a protector for the thermosensitive decomposition part of a sprinkler head having a structure in which there is little rattling after mounting and the thermosensitive member does not contact the protector.

In order to achieve the above object, the present invention provides the following protector for the thermal decomposition part of the sprinkler head.
That is, the protector is used for a sprinkler head provided with a plurality of frame arms having a nozzle in the main body and extending from the main body in the direction of water discharge of the main body, and the heat sensitive body is installed between the plurality of frame arms; There is an opening portion through which the thermosensitive decomposition portion including the heat-sensitive body can be inserted into the inside of the protector, a base surface is provided facing the opening portion, a support portion facing the frame arm close to the frame arm, And a lateral side disposed between the support portions, and a plurality of pillared posts are disposed on the inner side of the lateral side, and the posts are disposed close to the frame arm.

According to the protector for the thermosensitive decomposition part of the sprinkler head (hereinafter referred to as a protector), the support part and the post are disposed close to the frame arm so as to reduce rattling after the sprinkler head is attached. It is done. More specifically, the support portion has a first flat surface facing the frame arm, the post is installed in a direction intersecting the first flat surface, and the first flat surface and the post are close to the frame arm Be placed. The post is placed inside the multiple frame arms to reduce backlash of the protector.

The thermal decomposition portion of the sprinkler head is housed between spaced apart posts. Since the post suppresses the rattling between the protector and the frame arm, there is no interference between the protector and the thermosensitive decomposition part. In the present invention, two protectors having the same structure can be combined and mounted on the sprinkler head, and the tip of the post has an engaging structure.

The tip of the post projects beyond the first plane and engages the other protector inside the frame arm.

As described above, according to the present invention, it is possible to realize the protector for the thermosensitive decomposition part of the sprinkler head having a structure in which there is little rattling after mounting and the thermosensitive member does not contact the protector.

Sectional drawing of the sprinkler head equipped with the protector of 1st Embodiment. It is a front view of FIG. 1, and the state which installed only one protector of 1st Embodiment. The perspective view of the protector of 1st Embodiment. IV-IV sectional drawing of FIG. The modification of the protector of FIG. The perspective view of the conventional protector and sprinkler head.

The protector 10 of the present invention shown in FIGS. 1 to 4 is installed so as to cover the heat sensitive body of the sprinkler head S. The sprinkler head S is connected to a water supply pipe (not shown), and has a main body 1 having a nozzle 1A inside, and two

frame arms

2 and 2 extended from the main body 1 in a water discharge direction. The tip of the frame arm 2 is connected to a hollow boss 3 disposed on the central axis 1B of the nozzle. A deflector 4 is installed at the end of the boss 3.

The deflector 4 causes water discharged from the nozzle to collide and scatter in four directions, and has a substantially disk shape. A plurality of slits (not shown) are formed at the periphery of the deflector 4 and the water spray pattern is controlled by the shape of the slits.

The outlet of the nozzle 1A is closed by the closing member 5 in normal time. A thermal decomposition section 6 is provided between the closing member 5 and the boss 3. The thermal decomposition section 6 comprises a link 6A, a support 6B, and a lever 6C. The link 6A is a heat sensitive body operated by the heat of fire, and is formed by joining two thin metal plates 61 with a low melting point alloy. As the low melting point alloy, one having a melting point in the range of 60 to 200 ° C. is used, and a low melting point alloy having a melting point of 72 ° C. or 96 ° C. is generally used.

The substantially

rectangular metal plates

61, 61 have a hole 61a at one end and a slit 61b at the other end. The two metal plates 61 are joined by a low melting point alloy in a state in which the end opposite to the side where the hole 61a is installed is overlapped. The slit 61 b of the other metal plate 61 is disposed at the position of the hole 61 a of the one metal plate 61 after bonding. The support 6B and the lever 6C are respectively inserted into the two holes 61a.

The support 6B is a strip, and one end thereof is engaged with the closing member 5 installed at the outlet of the nozzle 1A, and the other end is engaged with the tip of the lever 6C. As described above, the hole 61a of the link 6A is inserted through the support 6B. A protrusion 63 is installed in the middle of the support 6B, and the link 6A is locked on the protrusion 63.

The lever 6C is configured by bending an elongated plate into a substantially L shape. As described above, one end of the lever 6C is inserted into the hole 61a of the link 6A. The other end side of the lever 6C is engaged with the support 6B, and the lever 6C is provided with a groove 64 in which the tip end of the support 6B is engaged.

The recessed part 65 is installed in the surface of the back side of the surface in which the groove | channel 64 was installed. The recess 65 is disposed closer to the other end of the lever 6C than the groove 64. An impression screw 7 screwed into the inside of the boss 3 is in contact with the recess 65. When the tip of the impression screw 7 presses the recess 65 of the lever 6C, the lever 6C rotates with the groove 64 in which the support 6B is locked as a fulcrum. However, the hole 61a of the link 6A is inserted through one end side of the lever 6C to prevent the rotation of the lever 6C. As a result, the link 6A, the support 6B, and the lever 6C constituting the thermal decomposition section 6 are maintained in the engaged state. Further, the impression screw 7 presses and holds the closing member 5 against the nozzle 1A via the thermal decomposition section 6.

In the sprinkler head S, the main body 1 is connected to a water supply pipe on the ceiling, and the deflector 4 is installed so as to protrude from the ceiling plate to the indoor side. During a fire, when the low melting point alloy of the link 6A melts, one metal plate 61 is pulled off from the other metal plate 61 by the rotation of the lever 6C. Thereby, the engagement state of the thermal decomposition section 6 is released, and the engagement of the link 6A, the support 6B and the lever 6C is released, and the closing member 5 supported by the support 6B separates from the nozzle 1A and drops out. It is released.

The protector 10 is removably engaged with the sprinkler head S using a combination of two of the same construction. The protector 10 is installed to protect the aforementioned link 6A from external force.

The protector 10 is provided with a base surface 11, and side surfaces 12, 12 extended in the direction of the frame arm 2 from both ends of the base surface 11 disposed on the lever 6C side of the link 6A are installed. The distal end side of the side surface 12 is disposed close to the frame arm 2.

The side surface 12 extends from the base surface 11 toward the frame arm 2, and the edge of the side surface 12 is disposed near the frame arm 2. An external force received from the base surface 11 is transmitted to the frame arm 2 through the side surface 12. Further, at the edge of the side surface 12, a support portion 13 in close proximity to the frame arm 2 is installed. The support portion 13 has a plate shape and has a flat surface 13 a (first flat surface). The outer edge of the support portion 13 is disposed outside the frame arm 2.

The flat surface 13 a of the support portion 13 is installed facing the frame arm 2, and the external force received from the base surface 11 side is transmitted from the side surface 12 to the frame arm 2 via the flat surface 13 a of the support portion 13. When an external force is applied to the frame arm 2 in the absence of the support portion 13, the external force is linearly concentrated and applied to the portion of the frame arm 2 where the edge of the side surface 12 approaches, but the flat surface 13a is provided. The external force is applied to the frame arm 2 by the surface, and the force applied to the frame arm 2 is dispersed.

Also, a plurality of posts 14 are disposed inside the side surface 12. The post 14 is disposed along the side surface 12 from the base surface 11 and extends in a direction intersecting the plane 13 a. A link 6A is disposed between the posts 14 to protect the link 6A from external force (see FIG. 2).

Moreover, the strength of the protector 10 with respect to external force is improved by installing the plurality of posts 14. By installing the post 14, the thickness of the protector 10 can be reduced or miniaturized. When an external force is applied from the side surface 12 side, the external force is transmitted to the frame arm 2 by the four posts 14 disposed inside the frame arm 2 and the external force is not applied to the thermal decomposition section 6.

The tip end of the post 14 protrudes outside the support portion 13 and has an engagement structure. As a specific example of the engagement structure, in FIG. 3, the tip shape of the post 14 is of two types of a hook 15 and a hole 16. Since the protector 10 combines the two and is mounted on the sprinkler head S, the tip shape of the post 14 is arranged such that the weir 15 and the hole 16 face each other when the two protectors 10 are combined.

In FIG. 3, the weir 15 and the hole 16 are disposed adjacent to each other. The posts 14 are installed at four places, and the posts 14 are installed apart from each other. The lower side (nozzle 1A side) post 14a is installed near the lower edge of the side surface 12. The upper (impress screw 7 side) post 14 b is disposed apart from the upper edge of the side surface 12.

In addition, a flat surface 17 (second flat surface) is provided between the side surfaces 12 and 12 on which the support portion 13 is provided. The plane 17 is installed only on the side of the impression screw 7. The plane 17 and the upper post 14b are spaced apart. Thereby, when the flat surface 17 of the protector 10 is disposed on the nozzle 1A and mounted on the sprinkler head S, the operator notices that the upper and lower sides of the protector 10 are reversed since the flat surface 17 interferes with the main body 1 it can.

When the two protectors 10 are mounted on the sprinkler head S, the support 13 is placed close to the frame arm 2 and the tips of the posts 14 are engaged with the posts 14 of the opposing protector 10 to stabilize the protector 10 with sprinkler It can be attached to the head S.

The tip of the post 14 protruding from the support portion 13 is disposed close to the inside of the frame arm 2 so that the distance between the protector 10 and the frame arm 2 is reduced. For this reason, there is almost no rattling, and the thermosensitive member housed inside the protector 10 does not interfere with the protector 10. When the two protectors 10 are attached to the sprinkler head S as shown in FIG. 4, a slight gap 18 is provided between the ends of the engaged posts 14, 14. The gap 18 has an effect of absorbing and reducing an impact due to an external force.

In the protector 10 described above, the side facing the base surface 11 is an opening 19, and the thermosensitive body is accommodated in the protector 10 from the opening 19. When the two protectors 10 are engaged, the openings 19 are engaged with each other facing each other.

Then, the modification of the protector 10 of the said structure is demonstrated. In the modified example of the protector 10 shown in FIG. 5, a recess 20 is formed by expanding a part of the support portion 13 toward the base surface 11. By doing this, when removing the protector 10 installed on the sprinkler head 2, it is easy to hook a finger or a tool between the

support portions

13, 13, and the workability is improved.

S sprinkler head
1 Main unit
2 frame arm
3 boss
4 Deflector
5 Closing member
6 Thermal decomposition unit
10 protector
11 Base plane
12 sides
13 Support
13a plane (first plane)
14 (14a, 14b) post
17 plane (second plane)
19 opening
20 dents

Claims

A protector used for a sprinkler head provided with a plurality of frame arms having a nozzle in the main body and extending from the main body in the direction of water discharge of the main body, and a heat-sensitive body installed between the plurality of frame arms,
It has an opening through which the thermosensitive decomposition part including the thermosensitive body can be inserted into the protector,
A base surface is installed facing the opening,
An opposing support close to the frame arm;
It has a base surface and a side surface installed between the support parts,
A protector for a thermosensitive decomposition part of a sprinkler head, wherein a plurality of pillar-shaped posts are installed inside the side surface, and the posts are disposed close to a frame arm.
The protector for the thermal decomposition part of the sprinkler head according to claim 1, wherein the support has a flat surface facing the frame arm, and the post is installed in a direction intersecting the flat surface of the support.
The protector for the thermosensitive decomposition part of the sprinkler head according to claim 1 or 2, wherein a tip end of the post protrudes outside the plane of the support part.
The protector for the thermal decomposition section of the sprinkler head according to any one of claims 1 to 3, wherein the tip of the post has an engagement structure.
The protector for the thermal decomposition section of the sprinkler head according to any one of claims 1 to 4, wherein the plurality of posts are spaced apart, and the heat-sensitive body is accommodated between the posts.
The protector for the thermosensitive decomposition part of the sprinkler head according to any one of claims 1 to 5, wherein the second flat surface and the post disposed on the inner side of the two side surfaces are spaced apart.
The protector for the thermal decomposition section of the sprinkler head according to any one of claims 1 to 6, wherein the edge of the support portion is disposed outside the frame arm.
The protector for the thermosensitive decomposition part of the sprinkler head according to any one of claims 1 to 7, wherein the two protectors of the above structure are disposed such that the openings face each other and are detachably engaged with the sprinkler head.