JPH0616201Y2 - Dimension adjustment pipe fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a dimension adjusting pipe joint device used for piping such as a sprinkler head.

2. Description of the Related Art FIG. 8 shows a conventional example of indoor sprinkler piping for fire extinguishing. When the sprinkler head 32 is attached at a position separated from the branch pipe joint 31 provided in the water distribution pipe 30 by a distance of L1 in the vertical direction and L2 in the horizontal direction of the left and right, the relative position between the branch pipe joint 31 and the sprinkler head 32. The relations L1 and L2 are not necessarily constant, and the relative positional relations are individually measured at the time of piping and the pipe is cut to a suitable length.

The end of the cut pipe 35 is threaded, and the pipe joint elbow 33, the union 34, and the socket 36 are used to sequentially connect from the branch pipe joint 31 to fix the socket 36 at a predetermined position. After that, the sprinkler head 32 is screwed into the socket 36 for pipe connection. For this reason, the assembly is performed in a work procedure that requires a lot of labor and time.

Problems to be Solved by the Invention In such piping by screwing, accuracy in pipe length and thread processing is required to correctly determine the relative position. Further, the length of the pipe 35 must be determined in consideration of the screwing allowances of the pipe joint elbow 33, the union 34, and the socket 36, the screw tolerance of the pipe joint and the pipe, and the like. Further, the piping work is often performed in a narrow space limited to the space above the ceiling or between the walls, and highly technical skill is required for accurate alignment and the like.

Further, the length after piping tends to be excessive or deficient due to the amount of screwing and the screw tolerance. If it is too long, the pipe cannot be used. Also, if you forcibly align the positions and make the piping,
There are many problems such as damage to the piping, which causes the piping to bend, making the appearance unattractive, and sometimes reworking.

Therefore, an object of the present invention is to provide a size-adjustable joint device which enables easy and quick piping work.

Means for Solving the Problem A dimension adjusting pipe joint device according to the present invention comprises a first curved pipe 1 and a second curved pipe 2 having one end inserted into an end of the first curved pipe 1. A connection adjusting device C for connecting the end of the first curved pipe 1 and one end of the second curved pipe 2 is provided. The connection adjusting device C includes an inclined surface 7 that comes into contact with an enlarged diameter portion 5 formed at the tip of the connection portion 4 of the first curved pipe 1 and a male screw 8 provided on the outer circumference.
And a cylindrical piece 6 which is rotatably and slidably fitted to the outer peripheral surface of the connecting portion 4 of the first curved pipe 1, and slidable to the outer peripheral surface of the end portion of the second curved pipe 2. Is fitted to and has a tapered surface 1 on the outer circumference.
Lock ring 12 having 3 and the expanded diameter portion 5 of the first curved pipe 1.
Of the ring 6 and the washer 15 arranged between the lock ring 12 and the packing 14, and the ring-shaped packing 14 closely fitted between the inner peripheral surface of the second curved pipe 2 and the outer peripheral surface of the second curved pipe 2. It is provided with a female screw 11 that is screwed into the screw 8 and a cap nut 9 that has a tapered hole 10 that abuts the tapered surface 13 of the lock ring 12. In this dimension adjusting pipe joint device, the other end of the second curved pipe 2 is rotatably connected to the water distribution pipe 30 via the male adapter 20 and the branch joint 31. Connecting part 4
Is larger than the diameter of the main body of the first curved tube 1. First curved tube 1
The end of the second curved pipe 2 is formed with an outer diameter smaller than the inner diameter of the connecting portion 4 and larger than the inner diameter of the first curved pipe 1. Rotation of the second curved pipe 2 with respect to the male adapter 20, rotation of the connecting portion 4 of the first curved pipe 1 with respect to the end of the second curved pipe 2, and the first curved pipe 1
Depending on the selected axial arrangement of the ends of the second curved pipe 2 within the connecting part 4 of the position of the radius of the first curved pipe 1 and the radius of the second curved pipe 2 within the range of rotation and the effective length. It can be adjusted.

Action The other end of the second curved pipe 2 is connected to the water distribution pipe 30 via the male adapter 20 and the branch joint 31 in a desired angle state. Further, the diameter of the connecting portion 4 is larger than the diameter of the main body of the first curved pipe 1, and the outer diameter of the end portion of the second curved pipe 2 is the first curved pipe 1.
Is smaller than the inner diameter of the connecting portion 4 and is larger than the inner diameter of the first bending pipe 1, the end portion of the second bending pipe 2 is inserted into the connecting portion 4 with a desired insertion amount to form the first bending pipe 1. The effective length of the second curved pipe 2 can be adjusted. By tightening the connection adjusting device C, the rotation of the second curved pipe 2 with respect to the male adapter 20, the rotation of the connecting portion 4 of the first curved pipe 1 with respect to the end of the second curved pipe 2, and the connecting portion of the first curved pipe 1. Adjusting the position and the effective length within the rotational range of the sum of the radius of the first curved pipe 1 and the radius of the second curved pipe 2 by the selected axial arrangement of the ends of the second curved pipe 2 within 4. You can

Embodiment Hereinafter, a first embodiment of the dimension adjusting pipe joint device according to the present invention will be described.
FIG. 7 to FIG. 7 are described.

As is apparent from FIGS. 1 to 3, the first embodiment of the present invention is an example of trade-in piping using first and second curved pipes 1 and 2. Branch pipe joint 31 provided in the water distribution pipe 30
From the vertical direction to the distance L1 and the horizontal direction to the distance L2 from the sprinkler head 32.

A sprinkler head 32 is provided at one end of the first curved pipe 1.
Is attached to the other end, and a connecting portion 4 having a diameter larger than the diameter of the main body of the first curved tube 1 is formed at the other end. The effective length 1 of the connecting portion 4 is appropriately set in accordance with the required size adjustment range. Second
As shown in the figure, the tip end of the connecting portion 4 of the first curved pipe 1 is a diameter-expanded portion 5 which is gradually expanded outward in a tapered shape. Further, one end of the S-shaped second curved pipe 2 is inserted into the connecting portion 4 of the first curved pipe 1, and the other end of the second curved pipe 2 is connected to the male adapter 20 shown in FIG. Are connected. Since the end portion of the second curved pipe 2 is arranged at a desired position in the connecting portion 4, the end portion of the second curved pipe 2 is smaller than the inner diameter of the connecting portion 4 of the first curved pipe 1 and the first curved pipe 2. The outer diameter is larger than the inner diameter of 1.

The connection adjusting device C shown in FIG. 2 is capable of rotating the other end of the first curved pipe 1 and one end of the second curved pipe 2 (rotation angle can be adjusted) and can adjust the connection length (expansion and contraction). Dimensionally adjustable). In the connection adjusting device C, the connecting portion 4 of the first curved pipe 1
A cylindrical piece 6 is rotatably fitted on the outer peripheral surface of the. A male screw 8 is provided on the outer circumference of the tip of the piece 6, and the inner circumference of the tip is formed as an inclined surface 7 whose diameter is gradually reduced inward. Slope 7
Is a taper surface having the same inclination angle as the enlarged diameter portion 5 of the connecting portion 4 in the above-mentioned first curved pipe 1, and can be engaged with the enlarged diameter portion 5 from the outer peripheral side.

A lock ring 12 is fitted on the outer peripheral surface of one end of the second curved pipe 2. The lock ring 12 is formed in an annular shape that fits on the outer periphery of the second curved pipe 2, and the annular outer periphery has a tapered surface 13 that is highly inclined in the direction facing the first curved pipe 1. Also,
Between the lock ring 12 and the expanded diameter portion 5 of the first curved pipe 1,
A packing 14 and a washer 15 each having an annular shape and having elasticity are interposed. That is, the packing 14 secures the sealing property between the tapered inner peripheral surface of the enlarged diameter portion 5 and the outer peripheral surface of the second curved pipe 2 between the first curved pipe 1 and the second curved pipe 2. A washer 15 is disposed on the packing 14 so as to be in contact with the back surface and to be elastically pressed.

As shown in FIG. 3, corrugated or sawtooth-shaped notched teeth 16 are formed on the surface of the lock ring 12 that engages with the outer peripheral surface of the second curved tube 2 so as to bite the outer peripheral surface of the second curved tube 2. It is also possible to increase the attachability. In addition, a diameter-expanded portion 21 is formed at the tip of the second curved pipe 2 that is inserted into the connecting portion 4 side to prevent it from falling off.

The cap nut 9 is formed by incorporating the above members inside.
A female screw 11 is screwed onto the outer peripheral male screw 8 of the piece 6. The cap nut 9 is provided with a tapered hole 10 that is large enough to abut the outer peripheral tapered surface 13 of the lock ring 12.

As shown in FIG. 1, a male adapter 20 is attached to the other end of the second curved pipe 2. The second curved pipe 2 is connected to the female thread of the branch joint 31 of the water distribution pipe 30 via the male adapter 20. In the male adapter 20, as shown in FIG. 4, an inclined surface 23 that is gradually expanded outward is formed at the inner peripheral tip of the main body 21 into which the end of the second curved tube 2 is inserted.
Male thread 24 and branch joint 3 of water distribution pipe 30 on the outer peripheral surface
A male screw 25 that is screwed into the first female screw is provided. Further, it has an annular elastic packing 27 for ensuring the sealing property between the main body 21 and the outer peripheral surface of the second curved pipe 2, and the packing 27
Is pressed against the washer 28. A cap nut 26 is screwed onto the male screw 24 of the main body 21, and by tightening the cap nut 26, the second bent pipe 2 is attached to the male adapter 20 at a desired angular position around the central axis. Can be connected. In the vicinity of the end of the second curved pipe 2, a bulged retaining rib 29 is provided on the outer periphery of the second curved pipe 2 to prevent the second curved pipe 2 from coming off the male adapter 20.

Next, the assembly procedure and operation of the first embodiment having the above configuration will be described.

At the time of assembly, the first and second curved pipes 1 and 2 are preliminarily assembled via the connection adjusting device C, and the male adapter 20 is set at the other end of the second curved pipe 2. The second curved pipe 2 is adjustable in the amount of pushing by the effective length 1 of the connecting portion 4, and is relatively rotatable with respect to the first curved pipe 1. After inserting the second curved pipe 2 into the connecting portion 4 to a desired insertion amount and rotating position, the piece 6 and the cap nut 9 fitted into the connecting portion 4 are tightened. The taper hole 10 of the cap nut 9 contacts the outer peripheral tapered surface 13 of the lock ring 12, and the lock ring 12 is axially pressed toward the connecting portion 4 by the tightening movement of the cap nut 9. Washer 1 with pressing lock ring 12
The packing 14 is pressed via 5 and the packing 14 is pressed into the enlarged diameter portion 7 of the connecting portion 4 while being compressed. Accordingly, the dimension adjusting pipe joint device can be fixed without rotating either the first curved pipe 1 or the second curved pipe 2 in the axial direction. When tightening the connection adjusting device C and rotating the cap nut 9 while fixing the rotation of the piece 6 with a tool, the piece 6 slides on the enlarged diameter portion 5 by the wedge action, and the enlarged diameter portion 5
Are pressed in the direction of diameter reduction. The washer 15 has an action of preventing direct contact between the lock ring 12 and the packing 14 or the expanded diameter portion 5. As a result, the piece 6 is securely attached to the expanded diameter portion 5, and the packing 14 that receives the axial pressing force of the lock ring 12 and the expanded pressure portion 5 of the expanded diameter portion 5 due to the movement of the cap nut 9 is securely attached. Exerts a sealing effect on. As a result, the first curved pipe 1 and the second curved pipe 2 are set so as to be relatively rotatable and expandable and contractable, so that the mounting position of the pipe can be freely adjusted. Therefore, it is not necessary to perform accurate position measurement, pipe cutting, screw cutting work, and screwing process at the piping site. Further, the piping work can be performed easily and quickly without the curved pipe coming off during the work.

In this manner, in the connecting portion 4, the packing 14 is brought into close contact with the outer peripheral surface of the second curved tube 2, and the lock ring 12 is pressed, so that the cut teeth 16 (FIG. 3) of the lock ring 12 are formed on the outer peripheral surface of the second curved tube 2. It bites and the movement of the second curved pipe 2 is prevented.

During the assembly, it is possible to adjust the position within the rotation range of the sum (R1 + R2) of the radii R1 and R2 of the first and second curved pipes 1 and 2 and the effective length 1, so that accurate dimension measurement and position measurement are possible. No need to pull out, cut pipe or thread. During the operation, the second curved pipe 2 does not come out of the connecting portion 4.

On the other hand, as shown in FIG. 2, when the second curved pipe 2 tries to come out of the connecting portion 4 of the first curved pipe 1, the enlarged diameter portion 21 at the tip hits the washer 15 and cannot come out. Further, as shown in FIG. 5, the retaining rib 29 engages with the male adapter 20 at the other end of the second curved pipe 2, so that the second curved pipe 2 is prevented from coming off. Therefore, the workability is improved by preventing the bent pipe from falling during work, and even if pressure is applied due to forgetting to tighten the cap nut 9, an accident due to the falling of the bent pipe is prevented. Next, by tightening the cap nut 26, the packing 27 is pressed to be in close contact with the main body 22 and the second curved pipe 2, and the retaining rib 29 is crimped between the cap nut 26 and the washer 27, so that the second curved pipe 2 The tube 2 and the male adapter 20 are completely fixed. As a result, the socket 3 is aligned with the regular position of the sprinkler head 32 to fix the first bent pipe, and the cap nut 26 of the male adapter 20 is tightened to fix the second bent pipe 2. After this, the cap nut 9 of the connecting portion 4 of the first curved pipe 1 is fully tightened.
Finally, attach the male screw of the sprinkler head 32 to the socket 3
Complete the piping by screwing onto the female screw.

The connection with the sprinkler head 32 is not limited to the socket 3, and a dresser type joint can be used.

FIG. 6 shows a second embodiment of the present invention in which a pipe for taking-up using the second curved pipe 2 having a U-shape is used. In the connection adjusting device C, the same operation as in the case of the first embodiment using the S-shaped second curved pipe 2 can be obtained.

Further, FIG. 7 shows a third embodiment of the present invention in which two pipes 30 and 30a fixed apart from each other are connected and connected. Between the branch joint 31 provided on the pipe 30 and the branch joint 31a provided on the pipe 30a, the socket 3 at one end of the joint body 1 is replaced with the male adapter 20,
Similar to the case of the sprinkler piping of the first embodiment, the connection piping is used.

As described above, in the present embodiment, for example, when connecting a fixed water distribution pipe and a sprinkler head provided separately from each other, or when connecting between two fixed pipes, a connection adjusting device is previously prepared. The first and second curved pipes 1 and 2 are relatively rotatably and telescopically inserted and set in C, so that the mounting position of the pipe can be freely adjusted.

Advantageous Effects of Invention In the present invention, the rotation of the second curved pipe with respect to the male adapter, the rotation of the connecting portion of the first curved pipe with respect to the end of the second curved pipe, and the end of the second curved pipe within the connecting portion of the first curved pipe Depending on the selected axial arrangement, the position within the rotation range of the radius of the first curved pipe and the radius of the second curved pipe and the effective length can be adjusted. Therefore, the socket can be pulled out from the water distribution pipe to a desired position. Further, since the installation efficiency of the piping work is significantly improved, it is possible to reduce the cost, and it is possible to prevent an accident by reducing unnecessary piping.

[Brief description of drawings]

FIG. 1 is an external view of a sprinkler pipe showing a first embodiment of a dimension adjusting pipe joint device according to the present invention, FIG. 2 is a partial sectional view of a connecting adjusting device of the first embodiment, and FIG. 3 is a first embodiment. FIG. 4 is a partial cross-sectional view of a male adapter, FIG. 4 is a partial cross-sectional view showing a state in which a second bent pipe is prevented from coming off, and FIG. 6 is a second embodiment of the present invention. External view of sprinkler piping, FIG. 7 is an external view of piping showing a third embodiment of the present invention for piping between two pipes, and FIG. 8 is an external view of conventional sprinkler piping 1 ... 1 Curved pipe, 2 ... Second curved pipe, 3 ... Socket, 4
...... Connecting part, 6 ...... piece, 9 ...... cap nut, 12 ...... lock ring, 14 ...... packing, 15 ...... washer, 20
...... Male adapter, 21 …… Expanding part, 29 …… Retaining rib, 31 …… Branch joint, 32 …… Sprinkler head, C …… Coupling adjustment device

Claims (2)

[Scope of utility model registration request] 1. A first curved pipe 1, a second curved pipe 2 having one end inserted into the end of the first curved pipe 1, and an end of the first curved pipe 1 and a second curved pipe. A connecting adjusting device C for connecting to one end of the pipe 2 is provided, and the connecting adjusting device C contacts the enlarged diameter portion 5 formed at the tip of the connecting portion 4 of the first curved pipe 1 and has an inclined surface 7. And a tubular piece 6 having an external thread 8 provided on the outer periphery and rotatably and slidably fitted on the outer peripheral surface of the connecting portion 4 of the first curved pipe 1,
A lock ring 12 slidably fitted to the outer peripheral surface of the end of the curved pipe 2 and having a tapered surface 13 on the outer periphery, and the first curved pipe 1
An annular packing 14 arranged in close contact between the inner peripheral surface of the expanded diameter portion 5 and the outer peripheral surface of the second curved pipe 2, and the lock ring 1.
A washer 15 disposed between 2 and the packing 14,
In a dimension adjusting pipe joint device including a female screw 11 that is screwed to the male screw 8 of the piece 6 and a cap nut 9 that has a tapered hole 10 that abuts the tapered surface 13 of the lock ring 12, a male adapter 20 and a branch joint 31 are provided. The other end of the second bent pipe 2 is rotatably connected to the water distribution pipe 30 via the connecting pipe 4, and the diameter of the connecting portion 4 is made larger than the diameter of the main body of the first bending pipe 1. Smaller than the inner diameter of the first curved pipe 1
Forming an end portion of the second curved pipe 2 with an outer diameter larger than the inner diameter of the second curved pipe 2 with respect to the male adapter 20 and connecting part 4 of the first curved pipe 1 to the end portion of the second curved pipe 2. Due to the rotation and the selected axial arrangement of the ends of the second curved pipe 2 within the connecting portion 4 of the first curved pipe 1, within the rotational range of the sum of the radius of the first curved pipe 1 and the radius of the second curved pipe 1. A size-adjustable pipe joint device, which is capable of adjusting a position and an effective length. 2. The dimension adjusting pipe joint device according to claim 1, wherein the first curved pipe 1 is S-shaped and the second curved pipe 1 is S-shaped or U-shaped.