JP6502776B2 - Connection structure of sprinkler head and piping - Google Patents

Description

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

The fire extinguisher 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 water. The sprinkler head is connected to the fire extinguisher piping installed on the ceiling, and the fire extinguisher piping is connected to the water source and always filled with water.

The sprinkler heads are installed at predetermined intervals on the ceiling surface, and the installation position is determined at the time of design of the building. 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 connection part between the sprinkler head and the pipe has a screw structure, and after sealing tape is wound around the screw of the sprinkler head, it is screwed and connected with the pipe side screw. By tightening this screw with a predetermined torque, the sealing tape is in close contact with the gap between the pill screw and the thumb screw to prevent water leakage. However, if the product is unfamiliar with the work, the sealing tape may be wound badly, or if the torque at the time of tightening is insufficient, water may be leaked. In the case of water leakage, the construction efficiency is reduced because rework is performed.

As a solution to this, there is, for example, a sprinkler head mounting structure described in Patent Document 1. In this case, a joint for inserting the sprinkler head is installed inside a joint on the piping side, and a ball for locking the inserted sprinkler head is installed at the joint. A sliding cylinder for locking the ball is installed on the outside of the joint under spring biasing.

According to this, when connecting the sprinkler head and the pipe, the sliding cylinder is moved to the pipe side to insert the sprinkler head into the joint portion in a state where the lock of the ball is released.
Subsequently, when the hand is released from the sliding cylinder, the sliding cylinder returns to its original position by the biasing of the spring. This locks the ball and keeps the ball and the sprinkler head engaged.

Japanese Utility Model Application Publication No. 6-77757

The connection structure of the sprinkler head and the pipe of Patent Document 1 does not have to be rotated as in a screw structure, and the connection work can be performed in a short time. However, there is an effort to move the sliding cylinder at the time of connection. In addition, since the sliding cylinder is biased by a spring, a grip is required when holding and moving it by hand, which causes 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 piping and resin pipe to which the sprinkler head is connected and the multiport joint (header) that connects the main piping of the fire extinguishing system piping connected to the water source has also been a screw structure in the past. , Efficiency of work and reduction of burden on workers are desired.

Therefore, in view of the above problems, it is an object of the present invention to provide a connection structure of a sprinkler head and piping, which can be simply connected in a short time in piping connection work of the sprinkler facility and the burden on the operator is small.

In order to achieve the above object, the present invention provides the following sprinkler head and piping connection structure.
That is, the rod joint has a cylindrical shape, and the inner side thereof has a joint portion through which the pea joint can be inserted, and the locking member is installed in the inside of the hole communicating the inner side and the outer side of the joint portion. A first sleeve is provided that can lock the oyster joint inserted into the joint portion, and the locking member prevents the outward movement of the 牝 joint on the outside of the 牝 joint, and the first sleeve inserts the 継 手 継 手 joint The second sleeve is provided with a second sleeve that is spring-biased on the side to be moved and the locking member prevents the inward movement of the wedge joint on the inner side of the joint, and the second sleeve is the side on which the pea joint is inserted It is a connection structure of a sprinkler head and piping characterized by being spring-loaded.

When the lobular joint is inserted into the joint portion of the 牝 joint, the second sleeve is pushed by the 継 手 joint, and the second sleeve moves to the back of the 牝 joint with the lobular joint. The movement of the second sleeve causes the locking member to appear on the inner circumferential surface of the joint. The locking member is urged in the central axis direction of the joint by the spring-loaded first sleeve, and moves in the central axis direction of the joint with the movement of the second sleeve to engage with the pea joint. The movement of the locking member causes the first sleeve to move downward so that the locking member prevents the outward movement of the wedge joint and maintains the engagement between the locking member and the coupling.

  As a result, the pea joint and the 継 手 joint are connected by the locking member only by inserting the 継 手 継 手 joint into the 、 joint, so that it is not necessary to move the sliding cylinder at the time of connection as in the prior art. And the working time can be shortened.

The above connection structure can be applied not only to the connection of the sprinkler head and the pipe but also to the part connecting the water supply pipe and the other end of the pipe to which the sprinkler head is connected at one end.

As described above, according to the present invention, it is possible to realize the connection structure of the sprinkler head and the piping which can be simply connected in a short time in the piping connection work of the sprinkler facility and the burden on the operator is small.

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

First embodiment (FIGS. 1 to 4)
The present invention describes a sprinkler head 3 including a oyster joint 1 and a 牝 joint 2 and, in the first embodiment, the oyster joint 1 and a winding pipe 4 including the 巻 き joint 2.

The nipple 1 is hollow and the inside thereof is a passage hole 11 through which fluid can pass. O-rings 12 and 13 which are annular water blocking members are installed on the outer upper end side. Below the O-rings 12 and 13, a step 14 is formed. The step 14 is disposed to face the end face of the sleeve 21 of the wedge joint 2.

Below the step 14, a groove 15 engaging with the locking member of the wedge joint 2 is engraved. The groove 15 is inscribed in an annular shape on the outer peripheral surface of the pea joint 1.

The joint 1 is provided on 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 rod joint 2 includes a hollow main body 20, and the upper portion of the main body 20 is connected to a unwinding pipe 4 indicated by a two-dot chain line in the drawing. A connection structure with the oyster joint 1 is installed at the lower part, and the inner peripheral surface is a seal surface on 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 biased downward in the figure by a coil spring 22 installed at the upper part of the sleeve 21. A collar portion 23 is formed on the outer peripheral surface of the sleeve 21, and the collar portion 23 can be engaged with a step 25 of the frame 24 described later.

The frame 24 has a tubular 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. Between the step 25 and the lower end is a joint portion through which the oyster joint 1 is inserted, and in the joint portion, a hole 27 for housing a ball 26 which is a locking member is bored. The hole 27 is formed to communicate the inside and the outside of the joint portion.

The inner diameter of the hole 27 is expanded 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 installed on the outer peripheral portion of the frame 24 below the hole 27. The retaining ring 28 can lock a sleeve 30 described later.

An upper portion of the frame 24 is screwed to the main body 20. It is also possible to connect by welding, brazing, an adhesive agent, etc. other than screw connection. Also, these methods may be combined and connected. Projections 29 are 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 is cylindrical, and the sleeve 30 is biased downward in the figure by a coil spring 32 disposed between the outer periphery of the frame 24 and the inner periphery of the sleeve 30.

The lower inner circumferential surface of the sleeve 30 holds the ball 26 so as not to come out of the hole 27. In a state in which the sleeve 30 is locked to the retaining ring 28 by the biasing of the coil spring 32 (FIG. 2), the ball 26 is held by the lower inner circumferential surface of the sleeve 30. At this time, the ball 26 is engaged with the groove 15 of the pea 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 clearance 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 collar portion 23 is engaged with the step 25. The ball 26 is blocked by the sleeve 21 from moving to the inner peripheral side of the frame 24.

A groove 31 is engraved on 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, when connected to the sprinkler head 3 as shown in FIG. 2, the projection 29 is disposed outside the groove 31.

When the sprinkler head 3 is connected, the projection 29 functions as a locking portion that prevents the sleeve 30 from moving upward in the figure by an accidental external force or the like and the sprinkler head 3 is detached. More specifically, as shown in FIG. 4A, in a state in which the pea joint 1 of the sprinkler head 3 is connected to the wedge joint 2, the projection 29 and the groove 31 are parallel to the central axis X of the sprinkler head 3. The sleeves 30 are arranged on the same straight line, and are movable up and down as shown in FIGS. 1 and 2 (unlocked state).

On the other hand, in the state of FIG. 4 (b) in which the sleeve 30 is rotated, the groove 31 is separated from the projection 29 (see FIG. 3). Since it interferes with the upper end, movement is blocked (locked).

Since the projection 29 is installed on the outer peripheral portion of the rod joint 2, visual confirmation can be easily performed. In addition, it is easy to operate the locked state and the unlocked state, and if the outer peripheral cross-sectional shape of the lower part of the sleeve 30 is polygonal such as hexagonal or octagonal, the socket wrench is inserted through the ceiling hole H to lower the sleeve 30 As a result, the sprinkler head 30 can be removed by pressing the sleeve 30 upward while rotating the sleeve 30.

The unwinding pipe 4 is a flexible pipe made of metal or resin, has one end connected to the sprinkler head 3 and the other end connected to a main pipe (not shown) connected to a water source. As a structure for connecting the sprinkler head or the main pipe to the unrolled pipe, the above-described pea joint 1 or the rod joint 2 can be used. The description of the structure other than the joint portion of the unwinding pipe 4 is omitted.

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

Before the sprinkler head 3 is connected to the unwinding pipe 4, as shown in FIG. 1, the sleeve 30 is engaged with the retaining ring 28. At this time, the ball 26 is blocked by the sleeve 21 from moving from the hole 27 toward the central axis X of the wedge joint 2.

First, the oyster joint 1 of the sprinkler head 3 is inserted into the inside of the rod joint 2. Then, the step 14 of the nipple 1 contacts the lower end of the sleeve 21. When the sprinkler head 3 is moved in the direction of the wedge joint 2 as it is, the sleeve 21 is moved upward in the drawing while the step 14 and the sleeve 21 are in contact with each other. At this time, the O-rings 12 and 13 of the joint 1 move while in contact with the sealing surface of the main body 20 of the joint 2. Also, the upward movement of the sleeve 21 enables the ball 26 to move toward the central axis X of the wedge joint 2.

When the step 14 contacts the end face of the 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 inclined surface formed in the relief groove 33 of the sleeve 30 pushes the ball 26 toward the groove 15, and the ball 26 accommodated in the hole 27 enters the groove 15 Move towards Subsequently, the sleeve 30 descends downward, and the inner peripheral surface of the sleeve 30 maintains the engagement between the ball 26 and the groove 15.

After the sleeve 30 is moved downward, the sleeve 30 is rotated to release the positions of the projection 29 and the groove 31 to lock them and complete the connection work.

Next, the procedure for removing the sprinkler head 3 from the winding pipe 4 will be described.

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

The sleeve 21 is moved downward by the action of the coil spring 22 when the groove 15 and the ball 26 are disengaged. Further, the step 14 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-port joint 5 provided with a oyster joint 1 will be described. The same reference numerals are given to the winding pipe 4 connected to the multi-necked joint 5 and to the portions having the same configuration as the first embodiment, and the detailed description will be omitted.

The multi-port joint 5 is connected to the main pipe (not shown) of the fire extinguishing system pipe connected to the water source, and the unwinding pipe 4 and the main pipe are connected via the multi-port joint 5. The multi-port joint 5 shown in FIG. 5 has a tubular 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 shown 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-port joint 5. At the connection port 52, a oyster joint 1 is installed, and can be connected to the rod joint 2 of the unwinding pipe 4.

As shown in FIG. 5 (a) as the structure of the multi-port joint 5, there is provided an elongated cylindrical portion 53, 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-port joint 5 is installed on the ceiling of a building, and conventionally, a pipe screw has been used for the unwinding pipe and the multi-port joint. For this reason, the worker was carrying out the work of screwing the unrolled pipe to the multi-port joint on a scaffold such as a high place work vehicle, and the burden on the worker was large. By using the provided multi-port joint 5 and the unwinding pipe 4, the working time can be shortened and the working load can be reduced.

Moreover, size reduction and weight reduction of the multi-port joint 5 can be achieved by using the structure of the present invention. Specifically, in the conventional screw connection multi-port joint, one connection port and an adjacent connection port are spaced apart at a predetermined interval in order to secure an operation space of the tool.

However, according to the present invention, since a tool is not required for connection between the unwinding pipe 4 and the connection port 52, the operation space of the tool becomes unnecessary, and the distance between the adjacent connection ports can be further narrowed. As a result, the multi-port joint 5 can be made smaller and lighter. Alternatively, more connection ports 52 can be installed without changing the length and size of the multi-port joint 5.

In the above, although the example which installed the oyster joint 1 in the multi-port joint 5 was shown, the rod joint 2 is installed and comprised in the multi-port joint 5, and the joint structure of the unwinding piping 4 corresponding to this is oyster joint It is also possible to make it one. Moreover, it is also possible to mix and install the oyster joint 1 and the rod joint 2 in one multi-port joint 5.

1 Fitting
2 牝 fitting
3 sprinkler head
4-roll piping
5 Multi-port fitting
11 passage hole
12, 13 O-ring 14 stages
15 groove
20 body
21 sleeve (second sleeve)
22, 32 coil spring
24 frames
26 Ball (Locking member)
27 holes
29 projections
30 sleeve (first sleeve)
31 groove
33 Relief groove

Claims (10)

The rod joint is cylindrical, and the inside has a joint portion through which the oyster joint can be inserted,
A locking member is installed inside the hole that communicates the inside and the outside of the joint portion,
The locking member can lock the oyster joint inserted into the joint portion,
The first sleeve is provided on the outside of the wedge joint with the locking member preventing the outward movement of the wedge joint, and the first sleeve is spring-biased to the side through which the coupling is inserted.
Inside the joint part, the locking member is provided with a second sleeve that prevents the inward movement of the wedge joint, and the second sleeve is spring-biased to the side through which the pea joint is inserted. Sprinkler head and piping connection structure. The sprinkler head and piping connection structure according to claim 1, further comprising a relief groove at the end of the first sleeve through which the lobular joint is inserted, the locking member being accommodated when the lobular joint is not connected. The connection structure of a sprinkler head and piping according to claim 1 or 2, wherein an end of the second sleeve through which the joint is inserted is movable together with the joint. The joint structure of the sprinkler head and piping in any one of Claims 1-3 provided with the step part which opposes the said edge part of a 2nd sleeve in oyster joint. The connection structure of the sprinkler head and piping in any one of Claims 1-4 by which the sealing member is installed in the exterior of a oyster joint. The joint structure of a sprinkler head and piping according to any one of claims 1 to 5, wherein the seal member is installed at the tip end side of the step portion in the joint. The sprinkler head and piping connection structure according to any one of claims 1 to 6, wherein a lock portion for preventing movement of the first sleeve is installed in the wedge joint. The 牝 joint is installed in a multi-port joint provided in a pipe connected to a water supply source, and the oyster joint is installed in a unwinding pipe connecting the sprinkler head and the multi-port joint. Connection structure of the sprinkler head and piping as described. The oyster joint is installed in a multi-port joint provided in a pipe connected to a water supply source, and the rod joint is installed in a unwinding pipe connecting between the sprinkler head and the multi-port joint. Connection structure of the sprinkler head and piping as described. The connection structure of the sprinkler head and piping according to any one of claims 1 to 7, wherein the rod joint is installed in a unwinding pipe connecting between the sprinkler head and the multi-opening joint, and the oyster joint is installed in the sprinkler head.

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