TW201637719A - Sprinkler head connection joint - Google Patents

Abstract

Provided is a sprinkler head connection joint, in which the length of a valve stick part is not limited and the water flow is not hindered by a valve body even though the valve body is moved over a long distance. The sprinkler head connection joint includes a cylindrical main body 10 having one end side 11 connected with a water supply piping, and the other end side 12 mounted thereon with a thermal sensing decomposition part 40; a flowing outlet 30 formed in the center of the main body 10; and a valve body 20 for blockading a connection between the one end side 11 and the flowing outlet 30, and opening up the connection by an operation of the thermal sensing decomposition part 40. The thermal sensing decomposition part 40 is locked to a section part 53 provided inside the other end side 12 of the main body 10. A holding member is provided between the valve body 20 and the thermal sensing decomposition part 40 for holding the thermal sensing decomposition part 40 to the section part 53 and holding the valve body 20 to a closing position.

Description

Sprinkler head connector

The present invention relates to a sprinkler head joint that is connected to a joint of a fire extinguishing device pipe and has a sprinkler head connected to an outlet of the joint.

The sprinkler is placed at or near the ceiling at or near the ceiling. However, in the case where there is an obstacle such as a pipe below the position where the sprinkler head is installed, there is a possibility that the pipe is blocked from watering. In the above position, for example, the sprinkler head attachment described in Patent Document 1 is used.

The sprinkler head attachment according to Patent Document 1 includes a main body having a head connecting port formed with a pipe connecting port at one end and a heat receiving portion at the other end, and a pipe connecting port provided in the body. A valve body that is closed between the head connection port. A heat-sensitive portion that normally opens the valve body in a closed state and opens the valve due to sensible heat in the event of a fire is provided at the mounting port. An open sprinkler head disposed below the conduit is connected to the head joint.

In Patent Document 1, a valve stem portion is connected between a glass valve of a heat sensitive portion and a valve portion of a valve body. The ball and the glass valve seat are interposed and arranged on a straight line. If the glass valve is broken due to the heat of the fire, the valve body is moved to the side of the fixing screw that is screwed to the front end of the bracket that supports one end of the glass valve. The valve portion collides with the end surface of the guiding portion provided in the body to open the flow path inside the main body, and supplies water to the head connecting port from the pipe connecting port, and distributes water from the open sprinkler head connected to the head connecting port to the lower portion of the pipe. .

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 10-108917

In the sprinkler mounting tool described in Patent Document 1, the valve system is held in the closed position by holding a fixing screw at one end of the glass valve and a bracket to which the fixing screw is screwed. Specifically, the water pressure of the water filled in the inside of the pipe connection port acts on the valve portion, and the force is applied to the fixing screw and the bracket through the valve rod portion, the spherical glass valve seat, and the glass valve. The fixing screw and the bracket resist the force generated by the aforementioned water pressure to hold the valve body, the glass valve, and the intermediate member.

Although there is a spherical body or a glass valve seat between the valve body and the glass valve as an intermediate member, when the valve rod portion is extended to the vicinity of the glass valve and the intermediate member is omitted, the front end of the valve rod portion is broken when the valve body is opened. Fixing the screw and not moving further, there is a valve that is fixed to the inside of the body to block The flow of water. Therefore, the spherical body and the glass valve seat are interposed between the valve stem portion and the glass valve, and the spherical body and the glass valve seat are released to the outside during the operation, whereby the valve body can be moved to the end surface of the guide portion.

The present invention has been made in view of the above problems, and an object thereof is to provide a sprinkler head joint in which the length of the valve body portion is not limited even if the valve body is moved a long distance and the valve body does not obstruct the flow of water.

To achieve the above object, the present invention provides the following sprinkler head joints.

In other words, a body having a cylindrical shape and having one end side connected to the water supply pipe and having the thermal decomposition portion on the other end side, an outlet formed in the intermediate portion of the main body, and closing the one end side and the outflow port are provided, and the heat is blocked by the heat. The valve body that is opened and opened by the decomposition unit is locked to the inner portion of the other end side of the main body, and the sensible thermal decomposition portion is held between the valve body and the thermal decomposition portion. The retaining member held in the closed position.

According to the invention, the retaining member is constituted by a saddle portion provided between the valve body and the thermal decomposition portion and a screw screwed to the center screw of the saddle portion, and the screw front end moves the valve body by moving the screw distal end toward the valve body side. The pressing is held by the valve seat, and the edge portion of the saddle presses and holds the thermal decomposition portion on the segment of the body. Most of the thermal decomposition portion protrudes from the other end side of the main body to the outside, and if the thermal decomposition portion is activated by the heat of the fire, the components of the thermal decomposition portion are not fixed to the main body and are detached. The saddle and the screw are also pushed to the outside of the body due to the movement of the valve body. Since there is no member that hinders the movement in the direction in which the valve body moves, the valve body can be surely moved to the other end side of the body, and the water supply is performed from one end side of the body to the outflow port.

Further, the holding member is constituted by a saddle portion and a cylindrical bracket provided between the valve body and the thermal decomposition portion, and the cylindrical holder is screw-connected to the other end side of the body formed in the inner portion of the inner thermal sensing portion can. In this case, the body portion and the bracket can be screwed together, and the edge portion of the saddle portion can press and hold the thermal decomposition portion to the segment portion, and the valve body contacting the saddle portion can be pressed and held by the valve seat.

In the above configuration, when the surface of the valve body opposite to the valve seat contact surface is provided with a rod portion whose front end extends to the vicinity of the saddle portion, the screw and the saddle portion are easily brought into direct contact with the front end portion of the rod portion.

Further, when the thermal decomposition portion of the above-described sprinkler head joint is connected to the fire extinguishing device pipe toward the ceiling side, the hot airflow during the fire stays in the vicinity of the ceiling, so that the sensible thermal decomposition portion easily collects heat, and the thermal decomposition portion can be earlier in the fire. Stage action.

Further, since the heat collector formed of a thin metal plate is provided at the front end of the thermal decomposition portion, the heat collected by the heat collector can be propagated to the thermal decomposition portion to promote the operation of the thermal decomposition portion. In addition, by further extending the shape of the collector toward the ceiling or through the surface of the collector, the surface area of the collector can be increased to collect more heat of the fire.

According to the present invention, since the thermal decomposition portion is locked to the segment formed on the other end side of the main body, and the components of the thermal decomposition portion after the decomposing operation are not locked and fixed to the main body and are discharged to the outside, the valve body can be removed. The movement of the member engaged with the valve body does proceed to the other end side of the body. Therefore, it is possible to provide a sprinkler connection joint in which the valve body does not obstruct the flow of water when the valve body is opened.

T1, T2‧‧‧ sprinkler head connector

S1‧‧‧Closed sprinkler head

S2‧‧‧Open sprinkler head

10‧‧‧ Ontology

13‧‧‧ valve seat

20‧‧‧ valve body

21‧‧‧ disc valve

22‧‧‧ pole

30‧‧‧Exit

40‧‧‧ Thermal Decomposition Department

42‧‧‧Leverage

45‧‧‧ cylinder

46‧‧‧Plunger

47‧‧‧Low melting point alloy

48A, 48B‧‧ ‧ collector

51‧‧‧ screws

52‧‧‧ bracket

54‧‧‧ saddle

56‧‧‧Departure

C‧‧‧Ceiling

D‧‧‧ catheter

P, P1‧‧‧ piping

Fig. 1 is a cross-sectional view showing a sprinkler head joint of the first embodiment.

Figure 2 is a system diagram of a sprinkler apparatus provided with the sprinkler head connection of Figure 1.

Figure 3 is a cross-sectional view of the thermal decomposition portion.

Fig. 4 is a state before the load application in Fig. 1.

Fig. 5 is a view showing a state in which the sprinkler head joint of Fig. 1 is provided with a protection portion.

Figure 6 is an actuation state of the sprinkler head connection of Figure 1.

Figure 7 is a top plan view of a portion of the sprinkler head connection of Figure 2.

Figure 8 is a cross-sectional view showing a sprinkler head joint of a second embodiment.

First embodiment (Fig. 1 to Fig. 7)

The sprinkler head connection joint T1 shown in Fig. 1 includes a main body 10, a valve body 20, an outflow port 30, and a thermal decomposition unit 40.

The sprinkler head connector T1 is disposed in the sprinkler device shown in FIG. The main body 10 of the sprinkler head connection joint T1 has a tubular shape, and the one end side 11 is connected to the pipe P1, and the other end side 12 is assembled with the thermal decomposition unit 40. An outflow port 30 is formed between the one end side 11 and the other end side 12, and the open sprinkler head S2 is connected to the outflow port 30 through the pipe 31.

An annular valve seat 13 is formed between one end side 11 of the body 10 and the outflow port 30. The inside of the valve seat 13 is a flow passage, but the valve body 20 is mounted on the other end side 12 of the valve seat 13 to close the flow passage.

The valve body 20 includes a disk-shaped disc valve 21 that closes a flow path between one end side 11 of the main body 10 and the outflow port 30, and a rod-shaped rod is provided on a surface of the disc valve 21 facing the thermal decomposition portion 40. Part 22. A hole 23 is bored in the front end of the rod portion 22, and a hole 23 is inserted into the front end side of the screw 51 to be described later.

The thermal decomposition unit 40 is composed of a mounting screw 41, a lever 42, a support plate 43, a balancer 44, a cylinder 45, a plunger 46, and a low melting point alloy 47. The thermal decomposition portion 40 is a structure in which the low melting point alloy 47 is filled in the inside of the cylinder 45, and the plunger 46 compresses the low melting point alloy 47. Since the thermal decomposition unit 40 has the same configuration as the "thermal decomposition unit" described in International Publication No. 2011/125169, the detailed description is omitted. The thermal decomposition unit 40 is assembled in the state shown in FIG. 3 and assembled to the holder 52.

In FIG. 3, two cylinders 48A, 48B formed of a thin metal plate are provided in the cylinder 45. The heat collectors 48A and 48B are fixed to the bottom surface of the cylinder 45 in an overlapping state. Collector 48A, 48B The peripheral portion is formed to be separated, and the heat collector 48B has a tapered surface portion which is formed in a tapered shape from the central portion to the peripheral portion. A plurality of holes (not shown) are provided on the inclined surface.

In FIG. 1, a cylindrical bracket 52 is disposed between the lever 42 of the thermal decomposition portion 40 and the other end side 12 of the body 10. The lower end of the bracket 52 is connected to the other end side 12 of the body 10, and a pair of segments 53 are formed on the inner surface of the upper end of the bracket 52. The lever 42 can pass through the notch 53A (refer to FIG. 6) between the oppositely disposed segments 53.

A saddle portion 54 is housed inside the bracket 52. The saddle portion 54 has a U-shaped cross section and has two standing portions 54A. The surface between the two standing portions 54A and the abutting surface of the lever 42 are formed with a female screw at the center of the abutting surface with the lever 42. The screw 51 described above is housed inside the bracket 52 in a state of being screwed to the female screw in advance. In FIG. 1, the front end of the standing portion 54A of the saddle portion 54 protrudes outward from the bracket 52.

The saddle portion 54 and the screw 51 function as a "holding member" that holds the step portion of the thermal decomposition portion 40 and holds the valve body 20 in the closed position. After the saddle portion 54 is received in the bracket 52, the lever 42 of the thermal decomposition portion 40 is locked to the segment portion 53 of the bracket 52.

The thermal decomposition unit 40 is configured such that the bent portion 42a of the lever 42 is inserted into the holder 52 through the notch 53A while the unit shown in Fig. 3 is reversed. When the bending portion 42a of the lever 42 is brought into contact with the edge portion of the saddle portion 54 to rotate the thermal decomposition portion 40 so that the front end 42b of the lever 42 comes to the position of the segment portion 53 of the bracket 52, The state shown in Figure 4 is shown.

From the state of FIG. 4, the tool shown by the broken line is inserted into the through hole 41a of the mounting screw 41, and the screw 51 is engaged with the tool and rotated. Thereafter, the saddle portion 54 is moved toward the levers 42, 42 (upper side in the drawing), and the front end 42b of the lever 42 presses the segment portion 53.

Then, the screw 51 moves to the side of the rod portion 22 (lower side in the drawing), and the screw 51 pushes the disc valve 21 to the valve seat 13 through the rod portion 22. Thereby, the edge portion of the saddle portion 54 that is in contact with the levers 42, 42 is elastically deformed toward the lower side in the drawing, and the vicinity of the center where the screw 51 is screwed is elastically deformed toward the upper side in the drawing.

On the other hand, the intermediate portion of the segment portion 53 which the front end 42b of the lever 42 presses is elastically deformed upward in the drawing. The load of closing the valve body 20 is imparted by the elastic force of these members. In the present embodiment, the opening 55 is formed on the circumferential surface of the bracket 52 at the position where the segment portion 53 is formed, whereby the opening 55 is configured such that the segment portion 53 is easily elastically deformed. The thermal decomposition portion 40 is held in the segment portion by the elastic force of the saddle portion 54 and the bracket 52 and the valve body 20 is held in the closed position.

A stopper 56 is provided between the bracket 52 and the other end side 12 of the body 10. A through hole 57 is formed in the center of the stopper portion 56, and the front end of the rod portion 22 is inserted into the through hole 57 in a state of protruding toward the thermal decomposition portion 40 side. When the valve body 20 is opened and moved to the thermal decomposition portion 40 side, the disk valve 21 collides with the stopper portion 56 to prevent the movement of the valve body 20, so that the valve body 20 does not escape to the outside of the body 10. Further, since the valve body 20 moves toward the other end side 12 of the body 10, the flow of water from the one end side 11 to the outflow port 30 is not hindered.

The through hole 57 is supported so that the disk valve 21 is pressed against the valve seat 13 after the screw 51 is rotated, and the shaft of the rod portion 22 and the axis of the screw 51 are arranged on a straight line. Thereby, the rod portion 22 is prevented from being eccentric inside the body 10, and the force applied from the screw 51 is uniformly applied to the disc valve 21.

The sprinkler head connection joint T1 shown in FIG. 5 is provided with a protection portion G so as to cover the thermal decomposition portion 40. A ring portion G1 having an inner diameter larger than the outer diameter of the bracket 52 is provided at the upper end of the protection portion G. The ring portion G1 is provided in the vicinity of the heat collector 48B provided at the front end of the thermal decomposition unit 40, and a plurality of pillar portions G2 extending from the ring portion G1 toward the holder 52 are formed. The thermal decomposition unit 40 is protected by the ring portion G1 and the column portion G2. The lower end of the column portion G2 is coupled to the cylindrical portion G3, and the inner surface of the cylindrical portion G3 is engaged with the outer peripheral surface of the other end side 12 of the body 10. The protection unit G protects the external force from acting on the thermal decomposition unit 40.

The space between the column portion G2 of the protection portion G and the adjacent column portion G2 is a space at which the components of the thermal decomposition portion 40 can pass through during the decomposition operation. In the present embodiment, the column portion G2 is provided at four places, and is disposed at equal intervals on the circumference of the ring portion G1. The portion of the column portion G2 that is connected to the ring portion G1 has the narrowest width. The side of the column portion G2 facing the thermal decomposition portion 40 is provided with a tapered portion so that the width of the side of the conventional holder 52 is widened.

The operating temperature of the thermal decomposition portion can be expressed on the outer surface of the protective portion G. For example, the operating temperature can be expressed in characters on the outer peripheral surface of the cylindrical portion G3. Alternatively, the protection portion G may be colored to indicate the operating temperature. For example, when the operating temperature of the thermal decomposition unit is 60 ° C, it can be expressed in "black", in the case of 96 ° C, it can be expressed in "white", and in the case of 139 ° C in "blue". This coloring indicates that the entire portion of the protection portion G can be colored, or only a predetermined position (for example, the ring portion G1) Or the cylinder portion G3) is colored. By applying a temperature indicating color to the protection portion G, it is easy to visually check the operating temperature of the sprinkler head connection joint T1 provided near the ceiling during inspection.

Next, the operation of the sprinkler head joint T1 of the first embodiment will be described.

The sprinkler head connection joint T1 is provided in a pipe P1 that is connected to the ceiling C from the pipe P in which the lock type sprinkler head S1 is provided at a predetermined interval as shown in Fig. 2 . A pipe D is disposed below the pipe P1, and the sprinkler head joint T1 is disposed near the ceiling C above the duct D, and the open sprinkler head S2 disposed below the duct D is connected to the outflow port 30 through the pipe 31.

If a fire occurs, the heat of the fire will stay near the bottom of the ceiling C. Then, the heat collectors 48A and 48B of the thermal decomposition unit 40 of the sprinkler head connection joint T1 collect the heat of the fire and then transfer the heat to the low melting point alloy 47 accommodated in the cylinder 45. The low melting point alloy 47 is melted by the heat of the fire, and the melted low melting point alloy 47 flows out through the gap between the cylinder 45 and the plunger 46. When the plunger 46 moves toward the bottom surface side of the cylinder 45, the balance of the components of the thermal decomposition unit 40 collapses and decomposes, and the levers 42 and 42 rotate with the front end 42b of the bracket 53 to the fulcrum. Release to the outside.

By the decomposing operation of the thermosensitive decomposition unit 40, the valve body 20 is opened from the holding state, and is moved in the direction of the other end side 12 by the pressure of the water filled in the inside of the one end side 11. The saddle portion 54 disposed between the thermal decomposition portion 40 and the valve body 20 and the screw 51 screwed to the saddle portion 54 move together with the valve body 20 and are pushed out to the outside of the bracket 52. When the valve body 20 moves, there is no movement in the direction in which the rod portion 22 moves. The rod portion 22 is not restricted by its length, and the front end side protrudes to the outside of the bracket 52.

When the valve body 20 is moved in a state where the hole 23 at the tip end of the rod portion 22 is engaged with the screw 51, the screw 51 and the saddle portion 54 can be pushed out of the bracket 52. After that, the disc valve 21 of the valve body 20 abuts against the stopper 56 and stops moving.

When the valve body 20 is moved open, the open sprinkler head S2 is supplied with water from the pipe P1 through the outflow port 30, and water is scattered under the duct D to eliminate the fire.

When the sprinkler head joint T1 described above is provided in the vicinity of the lower surface of the ceiling C from the thermal decomposition unit 40, the heat generated by the fire stays under the ceiling C, so that the thermal decomposition unit provided near the lower surface of the ceiling C can be provided. 40 is easy to work after being heated. More specifically, the distance from the thermal decomposition unit 40 to the lower surface of the ceiling C is set to be 0.3 m or less.

Fig. 7 is a plan view showing a portion in which the sprinkler head joint T1 is provided, with respect to the fire extinguishing apparatus of Fig. 2 provided with the sprinkler head joint T1. The circle drawn by the broken line indicates the sprinkling range of the lock type sprinkler head S1 and the open type sprinkler head S2. The sprinkling ranges depicted by dashed lines overlap each other and are configured to create no gaps. The sprinkling range of the lock type sprinkler head S1 is the same as the fire perception range. The range of fire perception is a circular range with a given radius centered on the sprinkler head, indicating that the circle is within the range of the sprinkler protection placed at the center of the circle. The fire sensing range is as shown by a broken line in Fig. 7, and is arranged without a gap together with the fire sensing range of the adjacent lock type sprinkler head S1.

On the other hand, the fire perception range of the sprinkler head connection joint T1 is represented by a circle drawn by a two-dot chain line. The sprinkler range of the open sprinkler head S2 connected to the spout 30 of the sprinkler head connection joint T1 is smaller than the circle drawn by the two-point chain line. The fire sensing range of the sprinkler head connection joint T1 corresponds to a wider range than the fire sensing range of the surrounding lock type sprinkler head S1.

When there is a difference in distance L between the shaft of the sprinkler head joint T1 and the shaft of the open sprinkler head S2, the sprinkler range of the sprinkler head connection joint T1 includes the sprinkler range of the open sprinkler head S2. The type sprinkler head S2 can obtain fire perception performance equal to or higher than that of the surrounding lock type sprinkler head S1. In other words, the sprinkling water of the open sprinkler head S2 is not caused by the difference between the distance L between the fire sensing portion (the thermal decomposition portion 40) and the sprinkling portion (the open sprinkler head S2), and is smaller than the surrounding lock type sprinkler S1. Slow to move.

In the case of implementing the sensitivity test specified in the decree, the sprinkler head connection joint T1 is faster than the lock type sprinkler head S1 from the start of the test to the time when the thermal decomposition portion is deactivated.

As a means for improving the fire perception performance, when the operating temperature of the sprinkler head connection joint T1 is substantially equal to the operating temperature of the surrounding lock type sprinkler head S1, the sprinkler head connection joint T1 is actuated first, as previously explained. The distance between the ceiling and the heat collector 48B is generally 0.3 m or less, and the cylinders 45 in which the heat collectors 48A and 48B and the low melting point alloy 47 are housed are exposed from the main body 10 to the outside so that the sprinkler head is connected to the joint T1. Fire perception performance is upward.

Two water collectors 48A and 48B are provided in the sprinkler head connection joint T1, but the fire perception performance can be improved by increasing the number of sheets of the heat collector, the surface area, and the like.

As a modification of the first embodiment described above, the bracket 52 can be integrally formed on the other end side 12 of the main body 10. In this way, the pursuit of simplification and reduction in manufacturing costs. Further, as a modification different from the above, a plurality of the outlets 30 may be provided in the body 10.

Second embodiment (Fig. 8)

Next, the sprinkler head joint T2 of the second embodiment will be described with reference to Fig. 8 . The same reference numerals are given to the same components as those of the first embodiment, and the detailed description is omitted. The sprinkler head joint T2 of the second embodiment shown in Fig. 8 is configured by cutting the screw 51 of the sprinkler head joint T1 of the first embodiment.

The saddle portion 61 of the second embodiment has a U-shaped cross section and has two standing portions 61A. The surface between the standing portions 61A and 61A is in contact with the lever 42. The rod portion 62 is in contact with the surface opposite to the abutting surface of the lever 42.

The front end of the rod portion 62 is processed into a spherical shape, and a portion of the saddle portion 61 where the rod portion 62 contacts is formed with a grind-shaped concave portion 63. The other end of the rod portion 62 is connected and fixed to the disc valve 21.

The stopper portion 64 provided inside the main body 10 is screwed to a male screw formed on the outer circumferential surface of the stopper portion 64 and a female screw formed inside the body 10. The through hole 65 of the stopping portion 64 is inserted through Rod 62.

In Fig. 8, the male screw formed at the lower end of the bracket 52 is screwed to the female screw formed on the other end side 12 of the main body 10, and by screwing these screws, the front end 42b of the lever 42 is pressed against the segment portion 53 through the saddle portion 61. Further, the rod portion 62 is pressed against the saddle portion 61 to press the disc valve 21 toward the valve seat 13. Thereby, the edge portion of the saddle portion 61 that is in contact with the levers 42, 42 is elastically deformed downward in the drawing, and is elastically deformed toward the upper side in the vicinity of the center in contact with the rod portion 62.

Further, the segment portion 53 is elastically deformed in the same manner as in the first embodiment. The thermal decomposition portion 40 is held in the segment portion by using these elastic forces and the valve body 20 is held in the closed position.

The operation of the sprinkler head joint T2 of the second embodiment is the same as that of the first embodiment, and therefore the description is omitted.

In the above-described sprinkler head joints T1, T2, a plurality of open sprinklers connected to the spout 30 of the body 10 can be connected. More specifically, the piping 31 connected to the connection port 30 of the main body 10 shown in Fig. 2 is divided and the sprinkler head joint S3 is added. If the additional sprinkler head connection joint S3 is placed above the duct D, water can be removed from the additional sprinkler head joint S3 for fires occurring on the duct to eliminate the fire.

Further, instead of the thermal decomposition unit 40 of the sprinkler head joints T1 and T2, a link type thermal decomposition unit configured by locking a pair of metal plates with a low melting point alloy bonded to a pair of levers may be used. Examples of the link type thermal decomposition unit are described in the specification of U.S. Patent No. 6,152,236 and U.S. Patent No. 7,275,603.

10‧‧‧ Ontology

11‧‧‧ one end side

12‧‧‧The other end side

13‧‧‧ valve seat

20‧‧‧ valve body

21‧‧‧ disc valve

22‧‧‧ pole

30‧‧‧Exit

40‧‧‧ Thermal Decomposition Department

41‧‧‧Mounting screws

42‧‧‧Leverage

42a‧‧‧Bend

42b‧‧‧ front end

43‧‧‧Support board

44‧‧‧balancer

45‧‧‧ cylinder

46‧‧‧Plunger

47‧‧‧Low melting point alloy

48A‧‧‧ Collector

48B‧‧‧ Collector

51‧‧‧ screws

52‧‧‧ bracket

53‧‧‧ Section

54‧‧‧ saddle

54A‧‧‧立部

55‧‧‧ openings

56‧‧‧Departure

57‧‧‧through holes

P1‧‧‧ piping

T1‧‧‧ sprinkler head connector

Claims (17)

A sprinkler head connection joint comprising: a body having a cylindrical shape and having one end side connected to a water supply pipe, and having a heat-decomposable portion on the other end side; an outlet port formed at an intermediate portion of the body; and the one end side and the flow a valve body that is closed between the outlets and opened by the thermal decomposition unit, and the thermal decomposition unit is locked to the inner portion of the other end side of the main body, and the thermal decomposition unit is provided between the valve body and the thermal decomposition unit. A retaining member that is retained in the section and holds the valve body in the closed position. The sprinkler head joint according to claim 1, wherein the holding member is constituted by a saddle portion provided between the valve body and the thermal decomposition portion, and a screw that is screwed to the saddle portion and presses the valve body. The sprinkler head joint according to the first aspect of the invention, wherein the holding member is formed by a saddle portion and a cylindrical bracket provided between the valve body and the thermal decomposition portion, and the cylindrical bracket is screwed and connected to the inside. The other end side of the body of the section of the thermal decomposition portion of the locking sensation. The sprinkler head joint according to any one of claims 2 to 3, wherein the surface of the valve body opposite to the valve seat contact surface has a rod portion whose front end extends to the vicinity of the saddle portion. The sprinkler head joint according to the fourth aspect of the invention, wherein the front end of the rod portion is moved to a position protruding from the other end side of the main body when the valve body is opened. The sprinkler head connection joint according to any one of claims 1 to 3, wherein The thermosensitive decomposition unit is disposed toward the ceiling side. The sprinkler head joint according to any one of the preceding claims, wherein a heat collector is provided at a front end of the thermal decomposition unit. The sprinkler head joint according to claim 7, wherein the collector is formed to extend in the direction of the ceiling. The sprinkler head joint according to any one of claims 1 to 3, wherein the thermal decomposition portion is provided with a hole that communicates with the tool engagement portion of the screw. The sprinkler head joint according to the fourth aspect of the invention, wherein the main body is provided with a stopper for restricting an opening movement distance of the valve body. A sprinkler head joint according to claim 10, wherein the front end of the rod portion is provided through the stopper portion. The sprinkler head connection according to any one of claims 1 to 3, wherein the thermal decomposition unit includes a pair of levers, and the front end portion of the lever is engaged with the end portion of the other end side of the main body, and is decomposed and activated. The holding members are released together to the outside of the body. The sprinkler head connection joint according to any one of claims 1 to 3, further comprising a protection portion covering the thermal decomposition portion. The sprinkler head connection according to claim 13, wherein the protection portion has a ring portion in the vicinity of the front end of the thermal decomposition portion, and has a plurality of column portions extending from the ring portion toward the body side. The sprinkler head connection according to claim 13, wherein the protection portion has an actuation temperature display of the thermal decomposition unit. The sprinkler head connection joint according to any one of claims 1 to 3, wherein The fire perception range of the sprinkler head connector is wider than that of the lock type sprinkler head disposed around the sprinkler head connector. The sprinkler head joint according to any one of the preceding claims, wherein the sprinkler head connection joint includes a sprinkler range of the open sprinkler head connected to the spout.