JP2017023501A - Sprinkler head and connection structure of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head which can be connected easily in a short time and reduce a burden on an operator in pipe connection work of sprinkler equipment, and a connection structure of a pipe.SOLUTION: A female joint 2 is a cylindrical shape and has a joint part at the inside, into which a male joint 1 can be inserted. A lock member 26 is installed inside a hole 27 communicating the inside and outside of the joint part. The lock member 26 can lock the male joint 1 inserted into the joint part. A sleeve 30 in which the lock member 26 blocks movement of the female joint 2 to the outside is provided outside the female joint 2. The sleeve 30 is energized by a spring to the side where the male joint 1 is inserted. A sleeve 21 in which the lock member 26 blocks movement of the female joint 2 to the inside is provided inside the joint part. The sleeve 21 is energized by a spring to the side where the male joint 1 is inserted.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joint to which a fire extinguishing sprinkler head is connected.

The fire-extinguishing sprinkler head is mainly installed on the ceiling of the building, and automatically operates in the event of a fire to spray water and extinguish the fire. The sprinkler head is connected to fire extinguishing equipment piping laid behind the ceiling, and the fire extinguishing equipment piping is connected to a water source and is always filled with water.

The sprinkler heads are installed on the ceiling surface at predetermined intervals, and the installation positions are determined when the building is designed. In order to install the sprinkler head at a predetermined position, the sprinkler head and the fire extinguishing equipment pipe are often connected via a flexible metal flexible pipe or a resin pipe.

The sprinkler head and piping connection portion has a screw structure, and a seal tape is wound around the male screw of the sprinkler head and then screwed to the female screw on the piping side. By tightening this screw with a predetermined torque, the sealing tape is brought into close contact with the gap between the male screw and the female screw to prevent water leakage. However, if something unfamiliar with the work is performed, the sealing tape may be wound poorly or water leakage may occur if the torque during tightening is insufficient. When water leaks, it is reworked, which causes a reduction in construction efficiency.

As this solution, for example, there is a sprinkler head mounting structure described in Patent Document 1. This is provided with a joint part into which a sprinkler head can be inserted inside a joint on the piping side, and a ball capable of locking the inserted sprinkler head is installed in the joint part. On the outside of the joint, a sliding cylinder for locking the ball is installed with a spring biased downward.

According to this, when connecting a sprinkler head and piping, a sprinkler head is inserted in a joint part in the state which moved the sliding cylinder to the piping side and the lock | rock of the ball | bowl was cancelled | released.
Subsequently, when the hand is released from the sliding cylinder, the sliding cylinder returns to the original position by the bias of the spring. Thereby, the ball is locked, and the state where the ball and the sprinkler head are engaged is maintained.

Japanese Utility Model Publication No. 6-77757

The connection structure between the sprinkler head and the pipe described in Patent Document 1 does not have to be rotated like a screw structure, and can be connected in a short time. However, there is a trouble of moving the sliding cylinder at the time of connection. Also, because the sliding cylinder is biased by a spring, gripping force is required to move it by hand, which is a burden on the operator when many connection operations are performed at the construction site of the sprinkler head. .

In addition, the connection structure between the flexible pipe and resin pipe to which the sprinkler head is connected and the multi-joint joint (header) that connects the main pipe of the fire extinguishing equipment pipe connected to the water source has also been a screw structure. Therefore, it is desired to improve work efficiency and reduce the burden on workers.

In view of the above problems, an object of the present invention is to provide a sprinkler head and piping connection structure that can be easily connected in a short time in piping connection work of a sprinkler facility and that places less burden on the operator.

In order to achieve the above object, the present invention provides the following sprinkler head and piping connection structure.
That is, the female joint has a cylindrical shape, and the inside has a joint part through which the male joint can be inserted, and a locking member is installed inside a hole that communicates the inside and outside of the joint part. The male joint inserted through the joint portion can be locked, and a first sleeve is provided outside the female joint to prevent the locking member from moving to the outside of the female joint. The first sleeve is inserted through the male joint. The second sleeve is provided on the inner side of the joint portion to prevent the locking member from moving inward of the female joint, and the second sleeve is the side through which the male joint is inserted. A sprinkler head and piping connection structure characterized by being biased by a spring.

When the male joint is inserted into the joint portion of the female joint, the second sleeve is pushed by the male joint, and the second sleeve moves to the back of the female joint together with the male joint. The locking member appears on the inner peripheral surface of the joint portion by the movement of the second sleeve. The locking member is biased in the central axis direction of the joint by the first spring-biased sleeve, and moves in the central axis direction of the joint as the second sleeve moves to engage with the male joint. The movement of the locking member moves the first sleeve downward, preventing the locking member from moving to the outside of the female joint and maintaining the engaged state between the locking member and the male joint.

  As a result, since the male joint and the female joint are connected by the locking member simply by inserting the male joint into the female joint, there is no need to move the sliding cylinder at the time of connection as in the conventional case, and the burden on the operator is reduced. Can be reduced and the working time can be shortened.

The connection structure described above can be applied not only to the connection between the sprinkler head and the pipe, but also to the portion connecting the other end side of the pipe with the sprinkler head connected to one end and the water supply pipe.

As described above, according to the present invention, it is possible to realize a sprinkler head and pipe connection structure that can be easily connected in a short time in pipe connection work of a sprinkler facility and has less burden on the operator.

Sectional drawing of the sprinkler head provided with the sprinkler head of 1st Embodiment, and the connection structure of piping, and unwinding piping. Sectional drawing which connected the sprinkler head of FIG. 1 and unwinding piping. Sectional drawing of the state which prevented the movement of the sleeve in FIG. (A) is a sectional view taken along the line aa in FIG. 2, and (b) is a sectional view taken along the line bb in FIG. It is a top view of the multi-joint joint of 2nd Embodiment, (a) is Embodiment with which the several connection port was installed on the straight line parallel to the central axis of a cylinder part. (B) Embodiment which provided the connection port installed radially from the side surface of a cylinder part.

1st Embodiment (FIGS. 1-4)
The present invention is composed of a male joint 1 and a female joint 2, and in the first embodiment, a sprinkler head 3 provided with the male joint 1 and a winding pipe 4 provided with the female joint 2 will be described.

The male joint 1 is hollow, and the inside is a passage hole 11 through which a fluid can pass. O-rings 12 and 13, which are annular water-stopping members, are installed on the outer upper end side. A step 14 is formed below the O-rings 12 and 13. The step 14 is disposed so as to face the end surface of the sleeve 21 of the female joint 2.

A groove 15 that engages with the locking member of the female joint 2 is formed below the step 14. The groove 15 is formed in an annular shape on the outer peripheral surface of the male joint 1.

The male joint 1 is provided in the main body 16 of the sprinkler head 3, and the lower end of the passage hole 11 is normally closed by a valve 17. The detailed structure of the sprinkler head 3 is known, and only the part related to the present invention will be described, and the detailed description of the other parts will be omitted.

The female joint 2 includes a hollow main body 20, and the upper portion of the main body 20 is connected to a winding pipe 4 indicated by a two-dot chain line in the drawing. A connection structure with the male joint 1 is installed in the lower part, and the inner peripheral surface is a sealing surface with which the O-rings 12 and 13 abut.

A cylindrical sleeve 21 is installed on the outer peripheral side of the sealing surface. The sleeve 21 is urged downward in the figure by a coil spring 22 installed on the upper portion of the sleeve 21. A flange portion 23 is formed on the outer peripheral surface of the sleeve 21, and the flange portion 23 can be engaged with a step 25 of the frame 24 described later.

The frame 24 has a cylindrical shape and is installed on the outer peripheral side of the sleeve 21. A step 25 is formed on the lower inner periphery of the frame 24. A joint portion through which the male joint 1 is inserted is provided between the step 25 and the lower end, and a hole 27 for receiving a ball 26 as a locking member is formed in the joint portion. The hole 27 is formed by communicating the inside and outside of the joint portion.

The inner diameter of the hole 27 increases from the inner peripheral side of the frame 24 toward the outer peripheral side. The inner diameter of the hole 27 on the inner peripheral side of the frame 24 is smaller than the diameter of the ball 26, and the inner diameter of the hole 27 on the outer peripheral side of the frame 24 is larger than the diameter of the ball 26. A retaining ring 28 is provided on the outer periphery of the frame 24 below the hole 27. The retaining ring 28 can lock a sleeve 30 described later.

The upper part of the frame 24 is screwed to the main body 20. In addition to screw connection, it is also possible to connect by welding, brazing, adhesive, or the like. Moreover, you may connect combining these methods. A protrusion 29 is formed on the outer peripheral surface of the frame 24. The protrusion 29 can be accommodated in a groove 31 formed on the inner peripheral surface of a sleeve 30 described later.

A sleeve 30 is installed on the outer peripheral side of the frame 24. The sleeve 30 has a cylindrical shape, and the sleeve 30 is urged downward in the figure by a coil spring 32 installed between the outer peripheral portion of the frame 24 and the inner peripheral portion of the sleeve 30.

The lower inner peripheral surface of the sleeve 30 holds the ball 26 so that it does not come out of the hole 27. When the sleeve 30 is locked to the retaining ring 28 by the bias of the coil spring 32 (FIG. 2), the ball 26 is held on the lower inner peripheral surface of the sleeve 30. At this time, the ball 26 is engaged with the groove 15 of the male joint 1.

On the other hand, when the sleeve 30 is at a position above the state of FIG. 2 as shown in FIG. 1, the ball 26 is accommodated in the escape groove 33 formed on the inner periphery of the lower end of the sleeve 30. At this time, the sleeve 21 is moved downward by the action of the coil spring 22, and the flange 23 is locked to the step 25. Further, the ball 26 is prevented from moving toward the inner peripheral side of the frame 24 by the sleeve 21.

A groove 31 is formed in the upper inner peripheral surface of the sleeve 30. When the groove 31 is not connected to the sprinkler head 3 as shown in FIG. 1, the protrusion 29 is accommodated in the groove 31. On the other hand, the protrusion 29 is disposed outside the groove 31 when connected to the sprinkler head 3 as shown in FIG.

When the sprinkler head 3 is connected, the protrusion 29 functions as a lock portion for preventing the sleeve 30 from moving upward in the figure due to an unexpected external force or the like to remove the sprinkler head 3. More specifically, as shown in FIG. 4A, the protrusion 29 and the groove 31 are parallel to the central axis X of the sprinkler head 3 in a state where the male joint 1 of the sprinkler head 3 is connected to the female joint 2. Arranged on the same straight line, the sleeve 30 is in a vertically movable state (unlocked state) as shown in FIGS.

On the other hand, in the state of FIG. 4B in which the sleeve 30 is rotated, the groove 31 is separated from the protrusion 29 (see FIG. 3), and when the sleeve 30 is moved upward in this state, the protrusion 29 is The movement is prevented because it interferes with the upper end (locked state).

Since the protrusion 29 is installed in the outer peripheral part of the female joint 2, visual confirmation is easy to perform. Also, it is easy to operate in the locked state and the unlocked state, and if the outer peripheral cross-sectional shape of the lower portion of the sleeve 30 is a polygon such as a hexagon or an octagon, a socket wrench is inserted through the ceiling hole H and the lower portion of the sleeve 30 is inserted. , The sprinkler head 30 can be removed by pressing upward while rotating the sleeve 30.

The unwinding pipe 4 is a flexible pipe made of metal or resin. The sprinkler head 3 is connected to one end side, and the other end side is connected to a main pipe (not shown) connected to a water source. The male joint 1 and the female joint 2 described above can be used as a structure for connecting the sprinkler head or main pipe to the unwind pipe. A description of the structure other than the joint portion of the winding pipe 4 is omitted.

Next, a procedure for connecting the sprinkler head 3 to the unwinding pipe 4 will be described.

The state before the sprinkler head 3 is connected to the unwinding pipe 4 is in a state where the sleeve 30 is locked to the retaining ring 28 as shown in FIG. At this time, the ball 26 is prevented from moving from the hole 27 toward the central axis X of the female joint 2 by the sleeve 21.

First, the male joint 1 of the sprinkler head 3 is inserted into the female joint 2. Then, the step 14 of the male joint 1 comes into contact with the lower end of the sleeve 21. When the sprinkler head 3 is moved in the direction of the female joint 2 as it is, the sleeve 21 is moved while being pushed upward in the drawing in a state where the step 14 and the sleeve 21 are in contact with each other. At this time, the O-rings 12 and 13 of the male joint 1 move while contacting the seal surface of the main body 20 of the female joint 2. Further, the upward movement of the sleeve 21 allows the ball 26 to move toward the central axis X of the female joint 2.

When the step 14 contacts the end surface of the main body 20, the groove 15 reaches the position of the hole 27. The sleeve 30 is biased downward by a coil spring 32, and the ball 26 is pushed toward the groove 15 by the inclined surface formed in the escape groove 33 of the sleeve 30, and the ball 26 accommodated in the hole 27 enters the groove 15. Move towards. Subsequently, the sleeve 30 is lowered downward, and the engagement state between the ball 26 and the groove 15 is maintained by the inner peripheral surface of the sleeve 30.

After the sleeve 30 moves downward, the sleeve 30 is rotated to separate the positions of the protrusions 29 and the grooves 31 to lock the connection work.

Next, the procedure for unwinding and removing the sprinkler head 3 from the piping 4 will be described.

First, as shown in FIG. 4A, the sleeve 30 is rotated to a position where the protrusion 29 and the groove 31 overlap each other. Subsequently, when the sleeve 30 is moved upward, the escape groove 33 reaches the position of the ball 26. The sleeve 21 urged downward by the coil spring 22 presses the step 14 downward, and pushes the ball 26 engaged with the groove 15 toward the escape groove 33.

When the engagement between the groove 15 and the ball 26 is released, the sleeve 21 moves downward by the action of the coil spring 22. Further, the step 14 that has been in contact with the sleeve 21 is also pushed downward, and the sprinkler head 3 is detached from the unwinding pipe 4 to complete the operation.

Second Embodiment (FIG. 5)
In the second embodiment, a multi-joint 5 including the male joint 1 will be described. In addition, about the unwinding piping 4 connected with the multi-necked joint 5, and the location same as 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

The multi-joint joint 5 is connected to a main pipe (not shown) of a fire extinguishing equipment pipe connected to a water source, and the unwind pipe 4 and the main pipe are connected via the multi-joint joint 5. The multi-joint joint 5 shown in FIG. 5 has a cylindrical shape, and is provided with connection ports 51 to the main pipe 6 at both ends, and one end is connected to the main pipe. The connection port 51 at the other end is closed by a plug indicated by a dotted line in the figure.

A plurality of connection ports 52 connected to the unwinding pipe 4 are provided on the side surface of the cylindrical portion of the multi-joint joint 5. The male joint 1 is installed at the connection port 52 and can be connected to the female joint 2 of the winding pipe 4.

As shown in FIG. 5A, the multi-joint 5 has a structure in which a long and narrow cylindrical portion 53 is provided, and a plurality of connection ports 52 are installed on a straight line parallel to a central axis (not shown) of the cylindrical portion 53. As shown in FIG. 5 (b), there is one provided with a plurality of connection ports 52 radially from the side surface of the cylindrical portion 53.

The multi-joint 5 is installed behind the ceiling of the building, and conventionally, unwinding piping and multi-joint joints use pipe screws. For this reason, the worker is carrying out the work of unwinding the pipe and screwing the pipe onto the multi-joint joint on a scaffold such as an aerial work vehicle, and the burden on the worker is large. By using the multi-joint 5 and the unwinding pipe 4 provided, the work time can be shortened and the work load can be reduced.

Further, by using the structure of the present invention, the multi-joint 5 can be reduced in size and weight. More specifically, in the conventional multi-joint with screw connection, in order to secure the operation space of the tool, one connection port and an adjacent connection port are separated from each other at a predetermined interval.

However, according to the present invention, since a tool is not required for connection between the unwinding pipe 4 and the connection port 52, an operation space for the tool becomes unnecessary, and the interval between adjacent connection ports can be further narrowed. Thereby, size reduction and weight reduction of the multi-joint joint 5 can be performed. Alternatively, more connection ports 52 can be installed without changing the length and size of the multi-joint 5.

In the above, the example in which the male joint 1 is installed in the multi-joint 5 is shown, but the female joint 2 is installed in the multi-joint 5 and the joint structure of the unwinding pipe 4 corresponding to this is shown. It can also be 1. It is also possible to install the male joint 1 and the female joint 2 together in a single multi-joint 5.

1 Male fitting
2 Female joint
3 Sprinkler head
4 Unwinding piping
5 Multi-neck fittings
11 Passing hole
12, 13 O-ring 14-stage
15 groove
20 body
21 Sleeve (second sleeve)
22, 32 Coil spring
24 frames
26 balls (locking members)
27 holes
29 Protrusions
30 Sleeve (first sleeve)
31 groove
33 Escape Groove

Claims (10)

The female joint is cylindrical and the inside has a joint part that can be inserted through the male joint,
A locking member is installed inside the hole that communicates the inside and outside of the joint,
The locking member can lock the male joint inserted through the joint part,
A first sleeve is provided outside the female joint to prevent the locking member from moving to the outside of the female joint, and the first sleeve is spring-biased on the side through which the male joint is inserted,
A second sleeve that prevents the locking member from moving inward of the female joint is provided inside the joint portion, and the second sleeve is spring-biased on the side through which the male joint is inserted. Sprinkler head and piping connection structure. The sprinkler head and piping connection structure according to claim 1, wherein the end portion of the first sleeve on the side where the male joint is inserted is provided with a relief groove in which the locking member is accommodated when not connected to the male joint. The sprinkler head and piping connection structure according to claim 1 or 2, wherein an end of the second sleeve on the side where the male joint is inserted is movable together with the male joint. The sprinkler head and piping connection structure according to any one of claims 1 to 3, wherein the male joint includes a step portion facing the end portion of the second sleeve. The sprinkler head and piping connection structure according to any one of claims 1 to 4, wherein a seal member is installed outside the male joint. 6. The sprinkler head and piping connection structure according to any one of claims 1 to 5, wherein the seal member is installed on the tip side of the step portion. The sprinkler head and piping connection structure according to any one of claims 1 to 6, wherein the female joint is provided with a lock portion that prevents movement of the first sleeve. 8. The female joint is installed in a multi-joint provided in a pipe connected to a water supply source, and the male joint is installed in a winding pipe that connects between the sprinkler head and the multi-joint joint. The sprinkler head and piping connection structure described. The male joint is installed in a multi-port joint provided in a pipe connected to a water supply source, and the female joint is installed in a winding pipe connecting between the sprinkler head and the multi-port joint. The sprinkler head and piping connection structure described. The sprinkler head and piping connection structure according to any one of claims 1 to 7, wherein the female joint is installed in a winding pipe connecting the sprinkler head and the multi-joint joint, and the male joint is installed in the sprinkler head.

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