JP6605912B2 - Sprinkler head mounting structure - Google Patents

Description

  The present invention relates to a sprinkler head mounting structure of a fire extinguishing facility in which a closed sprinkler head that operates by receiving a hot air current from a fire is installed in a pipe that supplies water supply.

  Conventionally, in general houses, apartment houses, group homes, and the like, there is known a fire extinguishing facility in which a closed sprinkler head is connected to the same pipe as the water supply and the fire is extinguished using the water supply in the event of a fire.

  Here, the water pressure to the sprinkler head of a general house is required to be, for example, 0.05 MPa, and sufficient fire extinguishing performance can be obtained at the time of fire by ensuring a water supply pressure exceeding 0.05 MPa from the water supply.

  FIG. 5 shows a conventional water supply direct fire extinguishing system. For example, a water supply pipe 100 drawn into a general house through a water meter 101 is branched into a general equipment pipe 100a and a fire extinguishing equipment pipe 100b. A faucet 106 for the hand-washing 102 and the bathtub 104 is connected to the general equipment piping 100a.

  For example, a closed sprinkler head 108 is connected to the fire extinguishing equipment pipe 100b for each room, and is connected to a water supply tank of the toilet 110 at the end of the pipe. The sprinkler head 108 is connected to a falling pipe 114 from a branch port of a T-shaped joint 112 provided in the fire extinguishing equipment pipe 100b through a socket.

  The sprinkler head 108 closes the head opening by a valve member held by a heat-sensitive mechanism. When the heat-sensitive function reaches a predetermined temperature due to a thermal air flow due to a fire, the head opening is opened by thermally decomposing and releasing the valve member. Open and sprinkle with tap water.

  Here, resin piping made of vinyl chloride is used for the general equipment piping 100a, the fire extinguishing equipment piping 100b, and the falling piping 114.

  FIG. 6 shows another fire extinguishing equipment using a conventional water supply. The water supply pipe 100 drawn through the water meter 101 is branched into a general equipment pipe 100a and a fire extinguishing equipment pipe 100b, and the fire extinguishing equipment pipe 100b is a water storage tank 116. Tap water is supplied. A fire extinguishing pump 118 is connected to the water storage tank 116, and a sprinkler head 108 is connected to the fire extinguishing equipment piping 100c drawn out from the fire extinguishing pump 118, and the internal pressure of the fire extinguishing equipment piping 100c is maintained at a predetermined value in a normal monitoring state. Yes.

  When the sprinkler head 108 is actuated and sprinkled by a fire, the pressure switch (not shown) detects a drop in the pipe pressure, activates the fire extinguishing pump 118, and operates the sprinkler head activated by supplying pressurized tap water pumped from the water storage tank 116. Continue watering from 108.

  FIG. 7 is an explanatory view showing a sprinkler head connecting structure branched and connected to the fire extinguishing equipment piping of FIGS. 5 and 6 by a T-shaped joint. FIG. 7 (A) shows a cross-section, and FIG. The disassembled state before assembly is shown.

As shown in FIG. 7 (B), the sprinkler head 108 is attached in the state that the mounting screw portion 124 of the sprinkler head 108 is screwed and fixed to the lower screw hole 122 of the resin socket 120 first. The liquid adhesive 126 is applied to the outer periphery of the distal end of the resin falling pipe 114 connected to the mold joint, and the adhesive is also applied to the inner surface of the fitting hole 128 of the socket 120 to ensure adhesion. Then, the fitting hole 128 of the socket 120 is fitted into the falling pipe 114 from the lower side, and as shown in FIG.

JP 2010-213825 A JP 2012-095794 A

However, in such a conventional fire extinguishing equipment, as shown in FIG. 7B, the adhesive 126 is applied to the outer periphery of the tip of the falling pipe 114, and the sprinkler head 108 is screwed and fixed thereto. When 120 is fitted, as shown in FIG. 7A, the adhesive applied to the outer periphery of the falling pipe 114 is pushed out and leaks, and flows into the inlet of the sprinkler head 108 as indicated by an arrow. It may harden and form a closed portion 130 that closes the inlet of the sprinkler head 108. Even if the sprinkler head 108 is activated due to a fire, there is a problem that tap water is not sprayed.

In order to solve this problem, as a procedure for attaching the sprinkler head 108, first, the socket 120 is fitted in a state where the adhesive 126 is uniformly and thinly applied to the outer periphery of the tip of the falling pipe 114 from the T-shaped joint. Then, the sprinkler head 108 may be screwed and fixed to the lower side of the socket 120 after a sufficient curing time has passed for the adhesive to adhere.

However, in facilities such as apartment houses and group homes, it is necessary to branch and connect many sprinkler heads to the fire extinguishing equipment piping, and the socket is fixed to the falling piping with an adhesive, and the curing time for the adhesive fixing is awaited. If the sprinkler head is connected to the socket, the work man-hours will increase significantly, and since the curing time will be required, the work time will also be longer, resulting in lower work efficiency and increased equipment costs. .

  The present invention provides a sprinkler head connection structure that is excellent in workability without causing the inlet of the sprinkler head to be blocked by leakage of the adhesive even if the socket to which the sprinkler head is connected is fixed to the branch pipe. With the goal.

(Sprinkler head mounting structure of the first invention)
The present invention is a sprinkler head mounting structure in which a socket that fixes a sprinkler head is fitted into a falling pipe branched from a pipe that supplies fire-extinguishing water, and is fixed by an adhesive.
The socket has a pipe fitting hole opened on the upper side followed by an internal flow path smaller in diameter than the pipe fitting hole and a fixing part for the sprinkler head. In addition, an adhesive reservoir is formed in which the adhesive pushed out in accordance with the fitting of the falling pipe with the adhesive applied to the outside is retained to prevent leakage to the sprinkler head side.

(Adhesive reservoir structure)
The socket is formed with an annular groove opened upward or on the inner peripheral side that functions as an adhesive reservoir.

(Sprinkler head structure of the second invention)
In another form of the present invention, in a sprinkler head mounting structure in which a socket to which a sprinkler head is fixed is fitted into a falling pipe branched from a pipe for supplying fire-extinguishing water, and fixed by an adhesive,
The socket is separated into a first socket located on the falling pipe side and a second socket located on the sprinkler head side,
The first socket is formed with a pipe fitting hole for fitting the falling pipe opened upward on the falling pipe side, and a falling edge in which an adhesive is applied to the outer periphery inside the pipe fitting hole. A socket that is provided with an adhesive reservoir that retains the extruded adhesive when the pipe is fitted and prevents leakage to the second socket side, and the second socket side is fitted with the second socket. The fitting hole is formed to open downward,
In the second socket, a fitting cylindrical portion is formed facing upward on the first socket side so that an adhesive is applied to the outer periphery and the pushed-out adhesive leaks out when fitted into the socket fitting hole. The fixing part of the sprinkler head is formed to open downward on the sprinkler head side.

(Adhesive reservoir structure)
The first socket is provided with an internal flow path having a diameter smaller than that of the pipe fitting hole following the pipe fitting hole, and is bonded to the ring-shaped stepped portion of the stepped hole extending from the pipe fitting hole to the internal flow path. An annular groove opened upward or on the inner peripheral side that functions as an agent reservoir is formed.

(Sprinkler head structure of the third invention)
In another form of the present invention, in a sprinkler head mounting structure in which a socket to which a sprinkler head is fixed is fitted into a falling pipe branched from a pipe for supplying fire-extinguishing water, and fixed by an adhesive,
The falling pipe is formed with a socket fitting hole that fits the socket downwards,
Socket, the falling pipe side and an adhesive is applied to the adhesive extruded when fitted abutted on the socket fitting holes on the outer periphery, the falling pipe side of the socket side end face of the falling pipe and socket A fitting cylindrical portion that leaks to the outside as a gap with the end face is formed upward, and a fixing portion for the sprinkler head is formed on the sprinkler head side so as to open downward.

(Effects of the sprinkler head mounting structure of the first invention)
The present invention relates to a sprinkler head mounting structure in which a socket in which a closed sprinkler head is screwed and fixed to a falling pipe branched from a pipe for supplying water for fire extinguishing is fixed by an adhesive. In addition, an adhesive pool is formed so that the adhesive pushed out inside with the fitting of the falling pipe coated with an adhesive on the outside is retained to prevent leakage to the sprinkler head side. Adhesive is applied to the outer periphery of the lower end of the falling pipe, and a socket with a sprinkler head screwed into it is fitted into the socket so that even if the adhesive is pushed out and leaks to the inside, the adhesive provided in the socket It stays in the agent reservoir and hardens in the adhesive reservoir, and the leaked adhesive enters the inlet of the sprinkler head and becomes blocked. It can be reliably prevented.

  Also, since the socket with the sprinkler head screwed in is fitted and fixed to the falling pipe with adhesive applied to the outer periphery of the tip, the socket is bonded and fixed to the falling pipe, and the curing time for the adhesive to adhere Later, there is no need for complicated and time-consuming work such as screwing and fixing the sprinkler head into the socket, and the sprinkler head can be moved through the socket in one operation without blocking the inlet of the sprinkler head with the leaked adhesive. It is possible to efficiently perform the work of fixing to the falling piping branched.

(Effects of the socket adhesive reservoir structure)
Further, the socket is provided with an internal flow path having a smaller diameter than the pipe fitting hole following the pipe fitting hole opened on the upper side, and a screw hole for screwing and fixing the sprinkler head following the internal flow path. The ring-shaped stepped portion of the stepped hole extending from the fitting hole to the internal flow path was formed with an annular groove opened upward or on the inner peripheral side that functions as the adhesive reservoir, and leaked inside. An annular groove with sufficient volume to retain the adhesive is secured, and precise work is required to reduce the amount of adhesive leakage as much as possible by applying the adhesive uniformly and thinly on the outer periphery of the tip of the falling pipe. Therefore, it is sufficient to apply and fix the adhesive sufficiently without unevenness, and to improve the working efficiency.

(Effects of the sprinkler head mounting structure of the second invention)
In another embodiment of the present invention, a sprinkler head mounting structure in which a socket in which a closed sprinkler head is screwed and fixed is fitted into a falling pipe branched from a pipe supplying fire-extinguishing water and fixed by an adhesive. The socket is separated into a first socket located on the falling pipe side and a second socket located on the sprinkler head side, and the first socket is a pipe for fitting the falling pipe on the falling pipe side. The fitting hole is formed to open upward, and when the falling pipe with adhesive applied to the outer periphery is fitted inside the pipe fitting hole, the adhesive pushed out inside is retained. An adhesive reservoir for preventing leakage to the socket 2 side is provided, and a socket fitting hole for fitting the second socket is formed on the second socket side so as to open downward. On the socket side, an adhesive cylinder is applied on the outer periphery, and when fitted into the socket mating hole, a fitting cylindrical part is formed upward to leak the extruded adhesive to the outside, and on the sprinkler head side, the sprinkler Since the screw hole for screwing and fixing the head is formed so as to open downward, the adhesive fixing between the falling pipe and the pipe fitting hole of the first socket is because an adhesive pool is formed in the first socket. The adhesive leaked inside does not leak into the adhesive pool and leak to the sprinkler head side (lower side) to be blocked.

  Further, the adhesive fixing between the lower socket fitting hole of the first socket and the upper fitting cylindrical portion of the second socket is performed by applying an adhesive to the outer periphery of the fitting cylindrical portion of the second socket located on the lower side. Since this is fitted into the socket fitting hole of the first socket located on the upper side, the adhesive pushed out by this fitting leaks to the outside and does not leak to the inside. The inlet is not blocked.

  Furthermore, the distance from the adhesive reservoir formed in the first socket to the inlet of the sprinkler head screwed and fixed to the lower end of the second socket is increased as the second socket is interposed. Even if the adhesive leaks over the distance, the distance to the inlet is long, so it is possible to reliably prevent the leakage from stopping due to adhesion to the inner wall in the middle and blocking the inlet of the sprinkler head. .

(Effects of the first socket adhesive reservoir structure)
The first socket is provided with an internal flow path having a smaller diameter than the pipe fitting hole following the pipe fitting hole, and in a ring-shaped stepped portion of a stepped hole extending from the pipe fitting hole to the internal flow path, Since an annular groove that opens upward or on the inner peripheral side that functions as the adhesive reservoir is formed, an annular groove having a volume sufficient to retain the leaked adhesive is secured, and the tip of the falling pipe Applying the adhesive sufficiently and fixing it without the need for precise work such as reducing the amount of leakage of the adhesive as much as possible by spreading the adhesive uniformly and thinly on the outer periphery, and improving work efficiency It is possible to increase.

(Effects of the sprinkler head mounting structure of the third invention)
In another embodiment of the present invention, a sprinkler head mounting structure in which a socket in which a closed sprinkler head is screwed and fixed is fitted into a falling pipe branched from a pipe supplying fire-extinguishing water and fixed by an adhesive. In this case, the falling pipe is formed with a socket fitting hole that fits the socket downward, and the socket is fitted on the falling pipe side by applying an adhesive on the outer periphery. The fitting cylindrical part that leaks the extruded adhesive to the outside when it is joined is formed upward, and the screw hole for screwing and fixing the sprinkler head is opened downward on the sprinkler head side Therefore, the lower socket fitting hole and the upper fitting cylindrical part of the socket are bonded and fixed to the outer circumference of the lower fitting cylindrical part of the socket. Since this is fitted into the socket fitting hole of the falling pipe located on the upper side, the adhesive pushed out by this fitting leaks to the outside and does not leak to the inside. It is possible to reliably prevent clogging of the head inlet.

  Since the sprinkler head is screwed and fixed to the socket, the outer periphery of the fitting cylindrical part formed on the outer periphery of the fitting is fitted into the socket fitting hole of the falling pipe, and the socket is fixed to the falling pipe. After the curing time when the adhesive is fixed, the complicated and time-consuming work of screwing and fixing the sprinkler head to the socket is not required, and the inlet of the sprinkler head is not blocked with the leaked adhesive, It is possible to efficiently perform the work of fixing the sprinkler head to the falling pipe branched through the socket in one work.

Sectional drawing which showed 1st Embodiment of the sprinkler head mounting structure Sectional drawing which showed the modification of 1st Embodiment of a sprinkler head mounting structure Sectional drawing which showed 2nd Embodiment of the sprinkler head mounting structure Sectional drawing which showed 3rd Embodiment of the sprinkler head mounting structure Explanatory drawing showing conventional fire extinguishing equipment that is directly connected to the waterworks Explanatory drawing showing conventional fire extinguishing equipment with a fire pump that uses water supply as a water source Sectional view showing conventional sprinkler head mounting structure

[First Embodiment of Sprinkler Head Mounting Structure]
FIG. 1 is a cross-sectional view showing a first embodiment of a sprinkler head mounting structure. FIG. 1 (A) shows a cross-section, and FIG. 1 (B) shows an exploded state before assembly.

  As shown in FIG. 1 (A), the sprinkler head mounting structure 10 of this embodiment is made of a resin connected to a branch port of a T-shaped joint provided in a fire extinguishing equipment pipe as shown in FIGS. A closed sprinkler head 16 is connected to the tip of the falling pipe 12 via a resin socket 14.

  The socket 14 is provided with an internal flow path 25 having a smaller diameter than the pipe fitting hole 18 following the pipe fitting hole 18 for fitting the falling pipe 12 opened upward, and the sprinkler head 16 is connected to the internal flow path 25. A screw hole 22 for screwing and fixing the screw portion 24 is provided, and an adhesive reservoir 20 formed of an annular groove is formed on a ring-shaped stepped surface of a stepped hole extending from the pipe fitting hole 18 to the internal flow path 25.

  The assembly work of the sprinkler head mounting structure of the present embodiment is as follows. As shown in FIG. 1B, first, a screw portion 24 having an inlet 26 of the sprinkler head 16 inside is screwed into a screw hole 22 on the lower side of the socket 14 and prepared.

  Subsequently, the liquid adhesive 28 is evenly applied to the fitting portion on the outer periphery on the distal end side of the falling pipe 12 branched by the T-shaped joint, as indicated by an imaginary line. The adhesive may be further applied to the inner wall portion of the pipe fitting hole 18 of the socket 14.

  In this state, when the pipe fitting hole 18 of the socket 14 to which the sprinkler head 16 is connected is fitted from the lower side to the falling pipe 12 to which the adhesive 28 is applied, the adhesive 28 is pushed out to the inside. As indicated by the arrow 1 (A), the adhesive leaks downward, but the leaked adhesive enters the adhesive reservoir 20 formed on the stepped surface of the stepped hole serving as the opening position of the internal flow path 25. .

  Since the adhesive reservoir 20 has an annular groove on the stepped surface of the stepped hole, the adhesive reservoir 20 has a sufficiently large storage volume with respect to the amount of adhesive leaked, and the adhesive that has entered the adhesive reservoir 20 is The adhesive stays without overflowing from the adhesive reservoir 20 and is cured as time passes to remain as the adhesive 30.

  Further, the adhesive remaining between the falling pipe 12 and the pipe fitting hole 18 of the socket 14 is hardened when the curing time has elapsed to form an adhesive layer 28a, and the socket 14 is bonded and fixed to the falling pipe 12. To do.

  For this reason, even if the adhesive 28 is applied to the outer periphery of the tip of the falling pipe 12 and the socket 14 in which the sprinkler head 16 is screwed and fixed is fitted, the adhesive is pushed out and leaks into the socket 14. It is possible to reliably prevent the leaked adhesive from entering and closing the inlet 26 of the sprinkler head 16 by being retained and cured by the provided adhesive reservoir 20.

  In addition, since the socket 14 is prepared by screwing and fixing the sprinkler head 16 and is fitted and fixed to the falling pipe 12 with the adhesive 28 applied to the outer periphery of the tip, the socket is bonded to the falling pipe. After the curing time for fixing and fixing the adhesive, without requiring a complicated and time-consuming work of screwing and fixing the sprinkler head to the socket, without closing the inlet 26 of the sprinkler head 16 with the leaked adhesive, It is possible to efficiently perform the work of fixing the sprinkler head 16 to the falling pipe 12 branched by the T-shaped joint through the socket 14 in one work.

  Further, as an adhesive reservoir 20 provided in the socket 14, an annular groove having a volume sufficient to retain the leaked adhesive is secured, so that the adhesive is evenly distributed on the outer periphery of the tip of the falling pipe 12. It is possible to improve the work efficiency by applying and fixing the adhesive 28 sufficiently without unevenness, without requiring the precise work of reducing the leakage of the adhesive as much as possible by applying it thinly. And

[First Embodiment of Sprinkler Head Mounting Structure]
FIG. 2 is a cross-sectional view showing a modification of the first embodiment of the sprinkler head mounting structure. In this embodiment, an inner ring that functions as an adhesive reservoir 20 is formed in a ring-shaped stepped portion that is the inner periphery of the bottom of a stepped hole that extends from the pipe fitting hole 18 formed in the socket 14 to the internal flow path 25. It is characterized in that an annular groove opened on the circumferential side is formed. The other structure is the same as that of the first embodiment shown in FIG.

  Even in this embodiment, when the pipe fitting hole 18 of the socket 14 to which the sprinkler head 16 is connected is fitted from the lower side to the falling pipe 12 to which the adhesive 28 is applied, the adhesive 28 is brought into the inside. The adhesive that has been pushed out and leaked into the adhesive reservoir 20 formed on the inner periphery of the bottom of the pipe fitting hole 18 enters, and as time passes, it hardens and remains as a fixed adhesive 30. It is possible to reliably prevent the sprinkler head 16 from entering and closing the inlet 26.

[Second Embodiment of Sprinkler Head Mounting Structure]
FIG. 3 is a sectional view showing a second embodiment of the sprinkler head mounting structure. As shown in FIG. 3, the sprinkler head mounting structure 10 of the present embodiment includes a first socket 14 a in which a socket is separated from the tip of a falling pipe 12 connected to a branch port of a T-shaped joint provided in a fire extinguishing equipment pipe. The closed sprinkler head 16 is connected via the second socket 14b.

  The first socket 14a is formed by opening a pipe fitting hole 18 for fitting the falling pipe 12 upward on the falling pipe 12 side, and an adhesive on the outer periphery inside the pipe fitting hole 18. An adhesive reservoir 20 is provided that retains the adhesive pushed inside when it is fitted to the applied falling pipe 12 and prevents leakage to the second socket 14b side. That is, the first socket 14a is provided with an inner flow path 25a having a smaller diameter following the pipe fitting hole 18, and a ring-shaped stepped hole from the pipe fitting hole 18 to the internal flow path 25a. An adhesive reservoir 20 is formed on the surface by an annular groove.

  Further, the first socket 14a is formed by opening a socket fitting hole 32 into which the second socket 14b is fitted downward.

  The second socket 14b has a fitting cylindrical portion 34 facing upward on the first socket 14a side, in which an adhesive is applied to the outer periphery and the pushed-out adhesive leaks out when fitted into the socket fitting hole 32. Forming. The fitting cylindrical portion 34 of the second socket 14b has an outer diameter that can be fitted into the socket fitting hole 32 of the first socket 14a, and the fitting cylindrical portion 34 having an outer periphery coated with an adhesive is used as the socket of the first socket 14a. When fitted in the fitting hole 32, the structure in which the adhesive pushed out from the gap between the two is leaked to the outside is realized.

  Further, the second socket 14b is formed with a screw hole 22 in the sprinkler head 16 side that is opened downward to screw and fix the screw portion 24 of the sprinkler head 16.

  The mounting operation of the sprinkler head according to the second embodiment is as follows. First, the screw portion 24 of the sprinkler head 16 is screwed and fixed in the screw hole 22 of the second socket 14b.

  Subsequently, a liquid adhesive is uniformly applied to the outer periphery of the tip of the falling pipe 12 branched and connected by the T-shaped joint, and the pipe fitting hole 18 of the first socket 14a is fitted from below. At this time, the adhesive is pushed out from the gap between the falling pipe 12 and the pipe fitting hole 18 of the first socket 14a and leaks downward, but on the stepped surface of the stepped hole serving as the opening position of the internal flow path 25a. The leaked adhesive enters the formed adhesive reservoir 20.

  In this case, the adhesive reservoir 20 has an annular groove formed in a ring shape on the stepped surface of the stepped hole. Therefore, the adhesive reservoir 20 has a sufficiently large storage capacity with respect to the amount of the leaked adhesive, and the adhesive reservoir 20 The adhesive that has entered stays without overflowing from the adhesive reservoir 20, cures with time, and remains as a fixed adhesive 30a. In addition, the adhesive remaining between the falling pipe 12 and the pipe fitting hole 18 of the first socket 14a is hardened when the curing time has elapsed to form an adhesive layer 28a, and the first socket is connected to the falling pipe 12. 14a is adhered and fixed.

Subsequently, a liquid adhesive is uniformly applied to the outer periphery of the upper fitting cylindrical portion 34 of the second socket 14b to which the sprinkler head 16 is screwed and fixed, and the socket fitting hole 32 opened to the lower side of the first socket 14a. Fit in. At this time, the adhesive is pushed out from the gap between the fitting cylindrical portion 34 of the second socket 14b and the socket fitting hole 32 of the first socket 14a and leaks to the outside. 30b.

  As described above, in the second embodiment shown in FIG. 2, the adhesive leaked inside by fitting the pipe fitting hole 18 of the first socket 14a into the falling pipe 12 is accumulated in the adhesive in the first socket 14a. Thus, it is possible to reliably prevent the adhesive that has entered and cured and leaked into the inlet 26 of the sprinkler head 16 from being blocked.

  Further, the adhesive pushed out by fitting the fitting cylindrical portion 34 formed on the upper side of the second socket 14b into the socket fitting hole 32 on the lower side of the first socket 14a leaks outside and does not leak inside. Therefore, the inlet 26 of the sprinkler head 16 is not blocked.

  Furthermore, the distance from the adhesive reservoir 20 formed in the first socket 14a to the inlet 26 of the sprinkler head 16 screwed and fixed to the lower end of the second socket 14b becomes much longer through the second socket 14b, Even if the adhesive leaks beyond the adhesive reservoir 20, the distance to the inflow port 26 is long, so that the leakage is caused by adhesion of the adhesive to the inner walls of the internal flow paths 25a, 25b. It is possible to reliably prevent the inlet 26 of the sprinkler head 16 from being blocked.

In addition, the first socket 14a is fixed to the falling pipe 12 and the second socket 14b is subsequently fixed to the first socket 14a by connecting the inlet 26 of the sprinkler head 16 due to leakage of the adhesive into the interior. Since the problem of blockage does not occur, it can be performed in one operation, and the operation of fixing to the falling pipe 12 branched by the T-shaped joint via the first and second sockets 14a and 14b can be performed efficiently. Make it possible.

  Further, in the second embodiment shown in FIG. 3, as in the modification of the first embodiment shown in FIG. 2, a stepped hole extending from the pipe fitting hole 18 formed in the first socket 14a to the internal flow path 25a. An annular groove opening on the inner peripheral side that functions as the adhesive reservoir 20 may be formed in a ring-shaped stepped portion that becomes the inner periphery of the bottom of the ring.

[Third Embodiment of Sprinkler Head Mounting Structure]
FIG. 4 is a sectional view showing a third embodiment of the sprinkler head mounting structure. As shown in FIG. 4, the sprinkler head mounting structure 10 of this embodiment is a socket in which a sprinkler head 16 is screwed and fixed to the tip of a falling pipe 12 connected to a branch port of a T-shaped joint provided in a fire extinguishing equipment pipe. 14c is bonded and fixed. The falling pipe 12 has a tip having a large diameter, and a socket fitting hole 36 is formed downwardly in the falling pipe 12.

  In the socket 14c, the screw portion 24 of the springer head 16 is screwed and fixed into the lower screw hole 22. Moreover, the socket 14c forms the fitting cylindrical part 38 on the upper side. The fitting cylindrical portion 38 of the socket 14 c has an outer diameter that can be fitted into the socket fitting hole 36 of the falling pipe 12, and the fitting cylindrical portion 38 coated with an adhesive on the outer periphery is fitted into the socket of the falling pipe 12. When fitted in the hole 36, a structure for leaking the adhesive pushed out from the gap between the two to the outside is realized.

  The assembly operation of the sprinkler head mounting structure 10 according to the third embodiment is as follows. First, the screw portion 24 of the sprinkler head 16 is screwed into the screw hole 22 of the socket 14c and prepared.

  Subsequently, a liquid adhesive is evenly applied to the outer periphery of the upper fitting cylindrical portion 38 of the socket 14c to which the sprinkler head 16 is screwed and fixed, and the socket fitting hole 36 opened to the lower side of the falling pipe 12 is applied. Fit. At this time, the adhesive is pushed out from the gap between the fitting cylindrical portion 38 of the socket 14c and the socket fitting hole 36 of the falling pipe 12 and leaks to the outside. Become.

  As described above, in the third embodiment of FIG. 3, the adhesive pushed out by fitting the socket 14c into the socket fitting hole 36 of the falling pipe 12 leaks to the outside and does not leak to the inside. The inlet 26 of the sprinkler head 16 is not blocked.

  Further, the fixing of the socket 14c to the falling pipe 12 can be performed in one operation because there is no problem of blocking the inlet 26 of the sprinkler head 16 due to leakage of the adhesive into the socket. It is possible to efficiently perform the work of fixing to the falling pipe 12 branched by the T-shaped joint via 14c.

  In addition, unlike the first and second embodiments shown in FIGS. 1 and 2, the present embodiment does not require the adhesive reservoir 20 to be provided therein, and its structure is simple and the cost can be reduced.

[Modification of the present invention]
In the sprinkler head mounting structure of the first to third embodiments, when the fitting hole is formed on the lower side of the connecting portion of the two pipe members, the adhesive is leaked to the inside by adhesive fixing. When a mounting structure is provided with an adhesive reservoir inside, a fitting hole is formed on the upper side of the connecting part of the two pipe members, and a fitting cylindrical part is formed on the lower side. A mounting structure that leaks to the outside can be used, and any mounting structure that includes either one or both includes a suitable mounting structure.

  The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Sprinkler head mounting structure 12: Falling pipes 14, 14c: Socket 14a: First socket 14b: Second socket 16: Sprinkler head 18: Pipe fitting hole 20: Adhesive reservoir 22: Screw hole 24: Screw part 26 : Inlet
28: Adhesive
28a: Adhesive layer 30, 30a-30c: Adhesive adhesive 32, 36: Socket fitting hole 34, 38: Fitting cylindrical part

Claims (5)

In a sprinkler head mounting structure in which a socket that fixes a sprinkler head is fitted into a falling pipe branched from a pipe that supplies fire-extinguishing water, and is fixed by an adhesive.
The socket is provided with an internal flow path having a smaller diameter than the pipe fitting hole, and a fixing portion of the sprinkler head is provided following the pipe fitting hole opened upward, and the internal flow path is provided from the pipe fitting hole. The adhesive reservoir that prevents the leakage to the sprinkler head side by retaining the adhesive pushed inside as the falling pipe with the adhesive applied on the outside is fitted is formed Sprinkler head mounting structure characterized by that.
In sprinkler head mounting structure according to claim 1, wherein said socket, sprinkler head mounting structure, characterized in that the upper or inner circumferential side annular groove open to function as the adhesive reservoir is formed.
In a sprinkler head mounting structure in which a socket that fixes a sprinkler head is fitted into a falling pipe branched from a pipe that supplies fire-extinguishing water, and is fixed by an adhesive.
The socket is separated into a first socket located on the falling pipe side and a second socket located on the sprinkler head side,
The first socket is formed with a pipe fitting hole for fitting the falling pipe facing upward on the falling pipe side, and an adhesive on the outer periphery inside the pipe fitting hole. When the applied falling pipe is fitted, an adhesive reservoir is provided to retain the adhesive pushed out inside and prevent leakage to the second socket side. A socket fitting hole for fitting the second socket is formed by opening downward,
In the second socket, a fitting cylindrical portion is formed on the first socket side so that an adhesive is applied to the outer periphery and the pushed-out adhesive is leaked to the outside when fitted into the socket fitting hole. The sprinkler head mounting structure is characterized in that a fixing portion of the sprinkler head is opened downward on the sprinkler head side.
4. The sprinkler head mounting structure according to claim 3, wherein the first socket is provided with an internal flow path having a smaller diameter than the pipe fitting hole following the pipe fitting hole, and the internal pipe is connected to the internal part from the pipe fitting hole. A sprinkler head mounting structure, characterized in that an annular groove opening upward or on the inner peripheral side that functions as the adhesive reservoir is formed in a ring-shaped stepped portion of a stepped hole leading to a flow path.
In a sprinkler head mounting structure in which a socket that fixes a sprinkler head is fitted into a falling pipe branched from a pipe that supplies fire-extinguishing water, and is fixed by an adhesive.
The falling pipe is formed by opening a socket fitting hole for fitting the socket downward,
The socket is on the falling pipe side, the adhesive extruded when the adhesive is applied fitted abutted on the socket fitting holes on the outer periphery, the socket-side end face of the falling pipe and the A fitting cylindrical portion that leaks to the outside that becomes a gap with the end surface on the falling pipe side of the socket is formed upward, and a fixing portion of the sprinkler head is formed to open downward on the sprinkler head side. Sprinkler head mounting structure characterized by that.

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