JP2014114930A - Tubular structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tubular structure capable of saving labor in work and having the same workability as that for a sprinkler pipe employing a metallic flexible pipe as a water conduit pipe by an arrangement in which it can be easily installed together with a sprinkler head fixed perpendicular to a ceiling through turning of a sprinkler head attachment even if the water conduit pipe is a resin pipe, a complex pipe of resin and metal or other non-metallic pipes and has no such a flexibility as that of a metallic flexible pipe.SOLUTION: This invention relates to a tubular structure for use in connecting a branch pipe 2 applied in a sprinkler pipe and a sprinkler head 4 and this tubular structure includes a rotation mechanism 6 installed within a fitting body, between a water conduit pipe 3 and a sprinkler head attachment 5, or in the midway part of the water conduit pipe 3. If the sprinkler head attachment 5 is of an elbow shape or the like, it can be fixed at an accurate fixing angle through a turning operation without performing any bending work of the water conduit pipe 3 just above the attachment body of the sprinkler head 4.

Description

  The present invention relates to a structure of a sprinkler pipe, which is composed of a water conduit pipe connecting a branch pipe and a sprinkler head, and attachment bodies such as joints at both ends, for use in sprinkler piping.

  Sprinklers are installed in high-rise buildings and underground malls that are difficult to extinguish when a fire breaks out, as well as welfare facilities, hospitals, hotels, department stores, etc. where there are concerns about the safety of human lives, and the piping is installed behind the ceiling. In plumbing work, sprinkler heads are installed perpendicular to the ceiling, and in order to discharge water toward a pre-designed area, the sprinkler heads with circular sprinklers around each sprinkler head are slightly overlapped with each other. It is necessary to arrange them in a grid so as not to cause a range that is not performed. In addition, complicated piping structures are often required so as not to interfere with other facilities such as ducts, cable racks, and electric wires installed in the back of the ceiling, and construction in a narrow ceiling is particularly troublesome. It was.

In order to reduce the labor of the above-mentioned construction, a sprinkler that employs a bendable metal or resin tube called a flexible tube that can freely bend the water conduit connecting the branch tube and the sprinkler head or a part thereof. Pipes are often used.
Since the sprinkler head is mounted vertically on the ceiling, the sprinkler pipe that is branched from the main water supply pipe and piped in a direction substantially parallel to the ceiling must be connected in a nearly orthogonal state near the top of the sprinkler head. is there. At that time, the pipe is often bent and an elbow-shaped joint is often used as the sprinkler head side end of the sprinkler pipe.
In other words, for sprinkler pipes that use thin metal spiral pipes for water pipes, the water pipes are relatively easy to bend, so such connections are easy, but resin pipes and aluminum composite pipes are used for water pipes. If it is, the bending radius is large and the workability is not equivalent to that of a thin metal spiral tube. Especially in places where the ceiling is narrow, it is often difficult to bend the pipe, so instead of bending the conduit, use an elbow-shaped joint on the sprinkler head side to substitute for bending the conduit. There are many.

Since the sprinkler pipe is generally connected to the branch pipe by screwing, the sprinkler pipe branch pipe side joint has a mechanism that rotates with respect to the main body so that it is not necessary to rotate and screw the entire sprinkler pipe, It has become common to employ nipple screws and cap nuts.
On the other hand, products designed to rotate the sprinkler head side joint of the sprinkler pipe with respect to the sprinkler conduit are not on the market. The reason is that in the case of a sprinkler pipe that employs a metal flexible pipe, which is currently the mainstream, as a water guide pipe, it is relatively short and easy to bend, so there is no need to meet the cost increase. In addition, for resin pipes, sprinkler pipe joints and pipes are generally connected by fixing them by fusion splicing or mechanical caulking, and the addition of a rotation function increases the manufacturing cost and makes it unacceptable to the market. It is done.

Resin pipes such as cross-linked polyethylene pipes and composite pipes of resin and metal have a smooth pipe inner surface shape (not an uneven inner surface shape like metal flexible tubes), so turbulent flow occurs when fluid passes through. Therefore, it is possible to manufacture a sprinkler pipe having a long water conduit compared with a sprinkler pipe using a metal flexible tube as a water conduit. Therefore, sprinkler pipes for apartment houses such as condominiums higher than the 11th floor are mainly made of resin pipes such as cross-linked polyethylene pipes as water conduits, and header pipes are installed horizontally behind the ceilings of entrances and bathrooms. From there, a header construction method is adopted in which sprinkler piping is provided for each room by feeding a water conduit to the back of the ceiling, and a long water conduit exceeding 10 m is also standard.
When a cross-linked polyethylene pipe is used as a water guide pipe for a sprinkler pipe, a fusion splice is often used when connecting to a joint on both ends or a resin header pipe. Since cross-linked polyethylene is generally difficult to fusion splice, it is manufactured as a two-layer pipe having an uncrosslinked polyethylene layer on the outer layer, and the joint is also connected to the pipe insertion portion of the joint in contact with the pipe outer layer as shown in FIG. The structure has an uncrosslinked polyethylene layer. The connection between the pipe and the joint is generally an electric fusion connection in which the non-crosslinked polyethylene layers of both the pipe and the joint are heated and melted by using the nichrome wire 92 to be connected. However, this structure has the following features: (1) If dust adheres to the splicing connection surface, it tends to cause poor fusing and is not suitable for connection work at the construction site. (2) The nichrome wire 42 is energized at the construction site. In the case of heating and solidifying, there is a problem that the skill of a craftsman in charge of the construction is required, and it is difficult to perform stable connection processing at the construction site.
When resin pipes are used not only for sprinkler pipes but also for hot water and hot water supply pipes, the clarification of the responsibility for the product performance of the manufacturer or the handling trading company is required by the customer. Therefore, manufacturers of sprinkler pipes or pipe material trading companies The supply system has been established in cooperation with a prefabricated processing company that has its own prefabricated processing plant. Based on the drawings from the customer, the piping is converted into drawings, necessary parts are calculated, assembled, and airtight testing Then, a piping system in which a plurality of sprinkler pipes are fusion spliced starting from a resin header pipe for each dwelling unit is prefabricated and rolled into a donut shape before shipment. When resin pipes are used as sprinkler pipes as conduit pipes, it is difficult to bend the pipes directly above the sprinkler head as described above, so elbow-shaped fittings are used for the joints to which the sprinkler heads are attached, The attachment angle is generally such that the attachment direction of the sprinkler head is downward in the direction perpendicular to the header pipe.
Also, the connection between the header pipe and the water conduit is often fusion spliced. When the sprinkler pipe is prefabricated, the sprinkler head mounting joint is fixed to the header pipe in the direction of twisting of the water conduit. Has been.

When prefabricated sprinkler pipes are installed at the construction site, when the header pipe is installed horizontally, the elbow of the sprinkler head mounting joint faces vertically downward so that the elbow joint faces vertically downward with respect to the header pipe. Fusion spliced.
If the pipe in the middle is installed in a meandering state due to the extra length of the pipe, the pipe twists and the sprinkler head mounting part of the elbow joint does not face directly below. There are many very difficult situations that need to be pressed in.
When manufacturing a sprinkler pipe using a composite pipe of metal and resin as a conduit, connect the ends of the pipe to the joint and connect the end of the conduit between the joint of the joint on both ends and the ring-shaped thin metal fitting. It is the mainstream to insert and connect the metal fitting and the end of the water conduit with compression using a dedicated tool. In this case, even if a joint having a rotation mechanism is added to the joint on the branch pipe side and the structure in which the water guide pipe can be rotated in the torsional direction after being connected to the header pipe or the branch pipe, the length of the water guide pipe becomes longer. Even if the sprinkler head is installed vertically with respect to the ceiling, it is difficult to install it properly if the water conduit itself is twisted, and the installation angle is generally fixed with a mounting bracket, making construction work difficult. The risk of changing the mounting angle of the sprinkler head due to loosening of the mounting bracket at a later date and the need for a mounting bracket that is stronger than necessary is a cause of cost increase.

  Patent Document 1 discloses a tube structure having a rotatable structure. However, the tube structure of Patent Document 1 is that the angle of the sprinkler head is adjusted by a bellows-shaped metal flexible tube, and the rotatable structure is not utilized for adjusting the angle of the sprinkler head. . In addition, since metal flexible tubes are manufactured by sheet metal processing, the processing accuracy is low compared to machining, and a plate thickness of around 0.3 mm is used as standard, so a sealing O-ring is attached. Since the part is expected to be easily deformed, it is not considered to be a structure that can actually maintain hermeticity, and is a pipe structure that lacks practicality.

  Patent Document 2 discloses a joint having a rotatable structure. However, the pipe structure of Patent Document 2 is not designed for a sprinkler pipe having a high pressure inside, and is not disclosed for use in adjusting the rotation angle of the sprinkler head.

JP 2005-027769 A JP 2010-236567 A JP 2011-089565 A

  The problem to be solved is to install a sprinkler head even if the water conduit is a resin tube, a composite tube of resin and metal, or other non-metallic tube, which does not have the flexibility of a metal flexible tube. A tube that has the same workability as a sprinkler pipe that employs a metal flexible pipe as a water conduit, because it can be easily installed with a sprinkler head that is fixed vertically to the ceiling as the body rotates. Is to provide a structure.

The tube structure of the present invention is
A pipe structure for connecting a branch pipe and a sprinkler head for use in sprinkler piping,
A joint and a water conduit connected to the branch pipe;
The sprinkler head attachment body connected to the opposite side to the branch pipe of the water conduit, and a rotation mechanism provided between the water conduit.

In sprinkler piping, a branch pipe (many of which is made of metal) branched from a main pipe is connected to the vicinity of the sprinkler head, and the branch pipe and the sprinkler head are connected by the sprinkler pipe. The present invention relates to a pipe structure for connecting a branch pipe and a sprinkler head.
The sprinkler head is connected to the sprinkler head mounting body by screwing or the like, and is fixed perpendicularly to the ceiling. In order for the sprinkler head to be fixed vertically to the ceiling, it is necessary to adjust the fixing angle of the sprinkler head mounting body. The angle adjustment in the longitudinal direction of the water conduit can be handled relatively easily by bending the water conduit even if the water conduit is a metal flexible tube, a resin tube, or a composite tube of resin and metal. As described above, in the case of a resin pipe or a composite pipe made of resin and metal, the angle adjustment in the twist direction of the water conduit is fixed to the water conduit, and it is difficult to twist the water conduit itself.
Here, the “sprinkler head mounting body” means a member that is directly coupled to the sprinkler head in the pipe structure, and can be a pipe, a joint, or a pipe integrated with the pipe and the joint. Both can be joints.
The sprinkler head mounting body is connected to the branch pipe through the water guide pipe of the sprinkler pipe. If a rotation mechanism is provided between the water conduit and the sprinkler head mounting body, the angle of the sprinkler head mounting body in the twist direction of the water conduit can be adjusted by the rotation mechanism.
Since the relative angle between the sprinkler head mounting body and the water conduit is adjusted, the object can also be achieved by the relative rotation of the fixed sprinkler head mounting body and the water conduit. If only the water guide pipe is rotated, it can be realized by providing a rotation mechanism between the branch pipe and the water guide pipe and not providing a rotation mechanism between the water guide pipe and the sprinkler head support. Such a tube structure is also conceivable. However, the water conduit has a length of several meters to over 10 meters and is often routed around other pipes and ducts, and the branch pipe side rotates while grasping the opposite side of the already connected water conduit. Even if it tries to make it, very difficult is expected. Moreover, it is troublesome for the operator to reciprocate between both ends of the water guide pipe every time the mounting angle of the sprinkler head mounting body is adjusted when the sprinkler pipe is installed at a high place in the construction site. Therefore, it is preferable to provide a rotation mechanism between the water conduit and the sprinkler head mounting body.

The tube structure of the present invention is
The water conduit is a resin tube, a composite tube of resin and metal, or a non-metal tube.

As non-metallic water conduits, resin pipes are often used, and in the future, composite pipes composed of resin and metal are expected to increase. If the water conduit is a bellows-shaped metal flexible tube, the maximum length is 4 m or less, and if it has sufficient flexibility, the angle of the sprinkler head can be adjusted without a rotating mechanism. is there. However, such pipes are supposed to be used mainly in long lengths and are less flexible than bellows-shaped metal flexible pipes, so they rotate to attach the sprinkler head perpendicular to the ceiling. Mechanism is desirable.
Even if the water conduit has sufficient flexibility like a bellows-shaped metal flexible tube, it is necessary to have a rotating mechanism for adjusting the orientation of the sprinkler head mounting body described later. This is also preferable from the viewpoint of labor saving.

The tube structure of the present invention is
In the rotation mechanism, a joint connecting the water guide pipe and the sprinkler head or the sprinkler head mounting body relatively rotates.

  The rotation mechanism can be provided between the water conduit and the joint connected thereto. If the sprinkler head mounting body is a pipe, the water guiding pipe rotates with respect to the joint connecting the water guiding pipe and the sprinkler head mounting body to form a rotating mechanism. If the sprinkler head mounting body is a pipe joint (a pipe whose end is a joint), the water guide pipe rotates with respect to the sprinkler head mounting body to form a rotating mechanism.

The tube structure of the present invention is
The rotating mechanism is provided inside a joint that connects the water conduit and the sprinkler head mounting body.

  The rotation mechanism can also be provided inside the joint. In this case, the joint is fixed to the water conduit and the sprinkler head mounting body.

The tube structure of the present invention is
The joint is a one-touch type.

  The one-touch joint is suitable for the purpose of the present invention, which is labor saving. Here, the “one-touch type” joint refers to a joint in which the joint and the pipe are coupled simply by inserting the pipe into the joint as shown in Patent Document 3, for example. In addition, the joint of patent document 3 is not rotatable, and not all the one-touch type joints currently marketed rotate the water conduit and the joint relatively.

The tube structure of the present invention is
The sprinkler head mounting body is not limited by the angle between the receiving direction of the water conduit and the mounting direction of the sprinkler head.

In order to match the angle of the sprinkler head by the rotation mechanism, it is necessary to change the sprinkler head mounting angle of the sprinkler head mounting body by rotation. That is, in the sprinkler head mounting body, if the receiving direction of the water guide pipe and the mounting direction of the sprinkler head are the same, the angle does not change even if the sprinkler head mounting body is rotated. These two directions need to be different. As the sprinkler head mounting body in which the water guide pipe receiving direction and the sprinkler head mounting direction are different, elbow-shaped ones are widely used.
On the other hand, even when the receiving direction of the water conduit is the same as the mounting direction of the sprinkler head, rotation may be required. For example, as shown in FIG. 8, the outer shape of the sprinkler head mounting body is an octagonal shape, and the octagonal shape is used to fix the sprinkler head mounting body to the fixture in a non-rotatable manner. This is because the orientation of the sprinkler head mounting body needs to be adjusted. Therefore, the technical scope of the present invention is not limited to the one in which the receiving direction of the water conduit is different from the mounting direction of the sprinkler head.
“Not limited by the angle of the mounting direction of the sprinkler head” means that it is not limited to the case of rotating for the purpose of adjusting the mounting direction of the sprinkler head but includes the case of rotating for other purposes.

The tube structure of the present invention is
A pipe structure for connecting a branch pipe and a sprinkler head for use in sprinkler piping, comprising a sprinkler pipe divided into a plurality of water pipes and connecting them, and a plurality of water pipes It has a mechanism that allows relative rotation, and as a result, it has a structure that allows adjustment of the orientation of the attachment body of the sprinkler head.

  By providing the rotation mechanism in the sprinkler pipe without providing it in contact with the sprinkler head mounting body, the same effect as described above can be obtained.

The tube structure of the present invention can accurately fix the angle of the sprinkler head even if the water conduit does not have sufficient flexibility, and contributes to labor saving of construction.
One-touch type pipe joints can be used to further reduce labor. Also, the orientation of the sprinkler head mounting body can be adjusted.

FIG. 1 is a diagram illustrating a sprinkler pipe. FIG. 2 is a view showing a pipe structure for connecting a branch pipe and a sprinkler head. FIG. 3 is a view showing an elbow type pipe joint having a rotation mechanism. FIG. 4 is a cross-sectional end view of an elbow pipe joint having a rotation mechanism. FIG. 5 is a view showing a joint having a rotation mechanism. FIG. 6 is a cross-sectional end view of a joint having a rotation mechanism. FIG. 7 is a cross-sectional end view of the one-touch joint having a rotation mechanism. FIG. 8 is a view showing a fixing structure of the sprinkler head mounting body. FIG. 9 is a view showing a conventional rotating mechanism.

  Examples of the present invention will be described below. However, the technical scope of the present invention is not limited to this embodiment.

  FIG. 1 is a diagram illustrating a sprinkler pipe. A branch pipe 2 is connected to the main pipe 1, and water is supplied from the branch pipe 2 to the sprinkler head 4 through the water guide pipe 3. Each sprinkler head 4 is installed on the ceiling and discharges water into a water discharge range indicated by a dotted line on the floor surface. In order to secure the water discharge range, each sprinkler head 4 needs to be installed with exactly the right direction.

FIG. 2 is a view showing a pipe structure for connecting a branch pipe and a sprinkler head. The water guide pipe 3 is extended from the branch pipe 2 and supplied to the sprinkler head 4 through the sprinkler head mounting body 5. A rotation mechanism 6 is provided between the water guide pipe 3 and the sprinkler head mounting body 5. The direction of the sprinkler head mounting body 5 is fixed by a fixing bracket 7.
As for the water conduit 3, the part shown with the dotted line in the figure may become a length of several m over 10 m. In many cases, it is difficult to operate the portion of the joint 8 that connects the branch pipe 2 and the water guide pipe 3 when the sprinkler head is being worked on the construction site.

FIG. 3 is a view showing an elbow type pipe joint having a rotation mechanism. The elbow type pipe joint 61 is obtained by integrating the sprinkler mounting body 5 and the rotation mechanism 6. The water guide pipe 3 is inserted on the side of the caulking ring 61a and fixed by caulking. On the other side, the sprinkler head 4 is screwed.
FIG. 4 is a cross-sectional end view of an elbow pipe joint having a rotation mechanism. The water guide pipe 3 can be inserted between the caulking ring 61 a and the main body tip 61 b, and the elbow pipe joint 61 can be rotated with respect to the water guide pipe 3. An O-ring 61c is provided and airtightness and watertightness are maintained. The sprinkler head 4 is screwed by the thread 61d.

Construction may be performed according to the following procedure.
First, the sprinkler head mounting body 5 is passed through the fixing bracket 7, and the sprinkler head 4 is screwed onto the thread 61d. As shown in FIG. 8, the sprinkler head mounting body 5 and the fixing bracket 7 are for fixing the angle by the octagonal outer shape of the sprinkler head mounting body 5. Further fixing may be performed by attaching a fixing tool (not shown) to the fixing bracket 7.
Next, the water conduit 3 is inserted into the sprinkler head mounting body 5. Since the water guide pipe 3 and the sprinkler head mounting body 5 are rotatable relative to each other, the water guide pipe 3 can be inserted into the sprinkler head mounting body 5 without applying an unnatural force even when it is passed through the fixing bracket 7. it can. Thereafter, the caulking is fixed by the caulking ring 61a.

According to the above configuration, construction for passing water to the sprinkler head 4 can be easily performed, and the angle of the sprinkler head can be fixed by the fixing bracket 7.
In addition, although the bending angle of the elbow type pipe joint 61 is illustrated as 90 degrees, other bending angles may be used depending on the installation angle of the ceiling and the installation path of the water conduit.

  In Example 1, the sprinkler head attachment body and the water guide tube rotate. In this embodiment, a rotation mechanism is provided inside a joint that connects the water conduit and the sprinkler head mounting body. Since parts other than the rotation mechanism 5 are the same as those in the first embodiment, description thereof is omitted.

FIG. 5 is a diagram illustrating an example of a joint having a rotation mechanism connected to a branch pipe. In the joint 62 having a rotation mechanism, the water guide pipe 3 is inserted on the caulking ring 62a side and fixed by caulking. On the other side, the sprinkler head mounting body 5 is screwed.
FIG. 6 is a cross-sectional end view of a joint having a rotation mechanism. The water guide pipe 3 is inserted and fixed between the caulking ring 62a and the main body tip portion 62b. An O-ring 62c is provided and airtightness and watertightness are maintained. The sprinkler head mounting body 5 is screwed together by a screw thread 61d provided with a rotating body 62e having a screw thread 62d on the outside of the main body of the joint 62 having a rotation mechanism. An O-ring 62f is provided between the main body and the rotating body, and there is no fear of water leakage.
The sprinkler head mounting body 5 is of an elbow type as in the implementation example 1.

Construction may be performed according to the following procedure.
First, a joint 62 having a rotation mechanism is attached to the water conduit 3. What is necessary is just to insert the water conduit 3 between the caulking ring 62a and the main body front-end | tip part 62b, and to fix it by the caulking ring 62a.
Next, the sprinkler head mounting body 5 is screwed onto the thread 62d. Even in this state, the main body of the joint 62 having the rotation mechanism and the rotating body rotate with each other, so that the water conduit 3 and the sprinkler head mounting body 5 can rotate with each other.
The sprinkler head mounting body 5 is passed through the fixing bracket 7, and the sprinkler head 4 is screwed onto the sprinkler head mounting body 5.

  In addition, before the caulking fixing by the caulking ring 62a is performed, the water guide pipe 3 and the joint 62 having the rotation mechanism can rotate with each other. Therefore, the construction can be performed in the same procedure as in the first embodiment.

  In this embodiment, a one-touch type joint is used. Since parts other than the joint are the same as those in the second embodiment, description thereof is omitted.

FIG. 7 is a cross-sectional end view of the one-touch joint having a rotation mechanism. The one-touch joint 63 having a rotation mechanism is used instead of the joint 62 having the rotation mechanism in the second embodiment.
Construction may be performed according to the following procedure.
First, a one-touch joint 63 having a rotation mechanism is screwed onto the water conduit 3.
Next, the sprinkler head mounting body 5 is inserted into the receiving portion 63a. At this time, the sprinkler head mounting body 5 can rotate with respect to the one-touch joint 63 having a rotation mechanism, that is, can rotate with respect to the water conduit 3.
The sprinkler head mounting body 5 is passed through the fixing bracket 7, and the sprinkler head 4 is screwed onto the sprinkler head mounting body 5.

  When water is passed after the completion of the construction, when the water guide pipe and the water guide pipe holder 63a are pushed out in the direction of the joint insertion port by water pressure, the gap between 63b and 63c in which 63a is accommodated becomes narrow in the same direction, and 63a is inserted into the gap. Since the wedge is pushed into a wedge shape, the sprinkler head mounting body 5 does not rotate due to the frictional force generated between 63a, 63b and 63c. Further, an O-ring 63d is provided, and airtightness and watertightness are maintained.

The pipe structure for connecting the branch pipe and the sprinkler head according to the present invention allows the sprinkler head to be mounted on the ceiling by rotating the sprinkler head mounting body even if the water guide pipe is not as flexible as a metal flexible pipe. Therefore, the sprinkler pipe can be easily constructed without requiring the skill of the person in charge of the construction. The same is true even if the shape of the sprinkler head mounting body is an elbow, for example, which contributes to labor saving in construction. It is expected to be used by many general contractors, equipment construction companies, and disaster prevention piping construction contractors.
Further, by adopting a one-touch type pipe joint as exemplified in the present specification, the connection mechanism for the rotation mechanism, the water guide pipe and the joint can be used together, so that the manufacturing cost for realizing the present invention can be expected to be suppressed. . Since it is expected that there will be no significant price increase due to the adoption of the new mechanism, it is strongly expected that the willingness to hire will be increased for general contractors, equipment construction companies, disaster prevention piping construction contractors, etc.
Also, when the main pipe is made of resin, it plays a complementary role of flexibility and makes it easier to introduce long products with the resin pipe, thus reducing the amount of metal branch pipe used and accompanying it Adopting conventional metal flexible pipes because the cost of material costs for joints for branch pipes and fixing brackets for branch pipes, labor costs for construction work, and management costs for water leakage due to reduced connection points are remarkable. As an alternative to sprinkler pipes, it is expected that the spread of sprinkler pipes using resin pipes, composite pipes of resin and metal, and other non-metallic pipes as water conduits will be promoted.
As described above, the present invention has a wide range of industrial applicability.

DESCRIPTION OF SYMBOLS 1 Main pipe 2 Branch pipe 3 Water guide pipe 4 Sprinkler head 5 Sprinkler head mounting body 6 Rotating mechanism 61 Elbow type pipe joint 62 Joint having a rotating mechanism 63 One-touch joint having a rotating mechanism 7 Fixing bracket mounting bracket 8 Joint 91 Thermoreversible resin 92 Nichrome wire

Claims (7)

A pipe structure for connecting a branch pipe and a sprinkler head for use in sprinkler piping,
A joint and a water conduit connected to the branch pipe;
A pipe structure comprising: a sprinkler head mounting body connected to an opposite side of the water conduit to the branch pipe; and a rotation mechanism provided between the water conduit and the sprinkler head mounting body.   The pipe structure according to claim 1, wherein the water conduit is a resin pipe or a composite pipe of resin and metal, and a non-metal pipe.   The said rotation mechanism is what the said water conveyance pipe rotates with respect to the coupling which connects the said water conveyance pipe and the said sprinkler head attachment body, or the said sprinkler head attachment body, The Claim 1 or 2 characterized by the above-mentioned. Tube structure.   The pipe structure according to claim 1 or 2, wherein the rotation mechanism is provided inside a joint that connects the water conduit and the sprinkler head mounting body.   The pipe structure according to claim 4, wherein the joint is of a one-touch type.   The pipe structure according to any one of claims 1 to 5, wherein the sprinkler head attachment body is not limited by an angle between a receiving direction of the water conduit and an attachment direction of the sprinkler head. A pipe structure for connecting a branch pipe and a sprinkler head for use in sprinkler piping,
An attachment body that divides a water conduit of a sprinkler pipe into a plurality of parts and connects them, and also has a mechanism that allows relative rotation of the plurality of water conduits. As a result, the orientation of the attachment body of the sprinkler head A tube structure characterized by a structure that allows adjustment.

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