JP2009236317A - Connecting joint and piping method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting joint capable of easily laying an antifreezing element, facilitated in maintenance, reduced in costs, and capable of securing an antifreezing function of a connecting joint part, and to provide a piping method using the same. <P>SOLUTION: This connecting joint 30 to be fitted to a floor surface or a wall surface to connect outside piping 40 arranged under the floor or outside a room to inside piping 49 arranged in the room comprises a first joint part 32, to which the outside piping 40 is to be connected, a second joint part 34, to which the inside piping 49 is to be connected, and a flange part 36 protruding in the radial direction and formed with a plurality of screw holes 38 for screwing to the floor surface or the wall surface. A through-hole 41, through which an antifreezing element 42 is passed, is formed in the flange part 36 between under the floor or the outside of the room and the inside of the room. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connection joint that connects an outer pipe that is attached to a floor surface or a wall surface and that is disposed under the floor or outdoors, and an inner pipe that is disposed indoors, and a method of constructing a pipe using the same.

In buildings, water pipes and hot water pipes are generally taken out from under the floor or wall surfaces, drawn into the room, and connected to facilities such as water taps.
At this time, a connection joint is attached to a floor surface or a wall surface (for example, refer to patent documents 1 and patent documents 2).

  The connection joint has a first connection part for connecting pipes in the underfloor and a second connection part for connecting indoor pipes. A flange portion protruding outward is formed at the indoor side end portion of the connection joint, and the flange portion becomes a portion fixed to the floor surface. That is, a plurality of holes for screwing are formed in the flange portion, and the connection joint is fixed to the floor by screwing the flange portion to the floor surface.

JP 2001-159165 A Registered Utility Model No. 3050921

In cold districts, it is common to provide an antifreeze body around the water pipe. This applies not only to the outdoors, but also to water pipes piped under the floor and water pipes exposed indoors.
Therefore, as described above, in the configuration in which the pipe under the floor and the pipe in the room are connected with the connection joint on the floor surface, the installation work of the antifreeze body must be performed separately in the floor and the room, and the construction is performed twice. There is a problem that it becomes time-consuming.
In addition, there is a problem that an increase in costs such as material costs is unavoidable due to the installation work of the antifreeze body both under the floor and in the room.

  In addition, when the conventional connection joint is used, in the case of a pipe structure that adopts the header piping method, it is necessary to install an underfloor inspection port during maintenance of the anti-freezing body, and there is no underfloor inspection port. The maintenance work is difficult. Further, in the case of a piping structure employing a conventional branch piping method, there is a problem that the installation work and maintenance work of the antifreeze body cannot be performed in a case of a low floor (the floor is 10 to 20 cm).

  In addition, when the conventional connection joint is used, the antifreeze body must be used separately for the floor and the room, so the antifreeze body does not come into contact with the connection joint portion, and the freeze at the connection joint portion. There is also a problem that the prevention function cannot be sufficiently secured.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and the object of the present invention is to facilitate the construction and maintenance of the piping to which the anti-freezing body is attached and to reduce the cost, and to connect the connecting joint portion. Another object of the present invention is to provide a connection joint and piping construction method that can secure the anti-freezing function.

That is, according to the connection joint according to the present invention, the outer pipe is connected to the outer pipe that is attached to the floor surface or the wall surface and that is disposed under the floor or outdoors and the inner pipe that is disposed indoors. A first joint portion to which the inner pipe is connected, a second joint portion to which the inner pipe is connected, and a flange portion that protrudes in the radial direction and is formed with a plurality of screw holes for screwing to the floor surface or the wall surface. A through hole for allowing the antifreeze body to pass through is formed in the flange portion under the floor or between the outdoor and indoors.
By adopting this configuration, it is possible to draw the antifreeze body provided in the outdoor outer pipe into the room through the through hole, so that the construction is easy even with the outer pipe pre-mounted with the antifreeze body, Since the antifreezing body also contacts the connecting joint portion through the through hole, it is possible to prevent freezing at this portion. In addition, since a common antifreeze body can be used for the outer pipe and the inner pipe, cost reduction such as material costs can be achieved. Furthermore, maintenance of the antifreeze body is also possible through the through hole. Furthermore, since the antifreezing body can be inserted from the indoor side to the floor or the outside of the room, the antifreezing body can be easily installed even in a piping structure constructed by the conventional branch piping method.

Further, the through hole may be a round hole.
According to this configuration, it is very easy to insert the antifreezing body into the through hole, which contributes to shortening of the work process.

  Further, the through hole may be formed by being cut out at an outer edge of the flange portion.

Of the plurality of screw holes, at least a screw hole adjacent to the through hole may be formed by being cut out at the outer edge of the flange portion.
By adopting this configuration, even if the hole formed for attaching the connection joint to the floor or wall surface has become slightly larger, the screw should not be driven into the hole. A screw can be protruded toward the floor or wall surface existing around and can be fixed securely.

Further, among the plurality of screw holes, a screw hole adjacent to the through hole is formed from a line connecting the center of the second joint portion and the center of the through hole, and the center of the screw hole and the second joint portion. A line connecting the center may be formed at a position separated by 60 degrees or more.
According to this configuration, the screw is not driven into the hole on the floor surface or the wall surface formed in the vicinity of the through hole by separating the place where the screw is fixed from the position where the through hole is formed as much as possible. Can do.

Further, among the plurality of screw holes, a screw hole adjacent to the through hole is formed by connecting a center of the screw hole and the second joint portion from a line connecting the center of the second joint portion and the center of the through hole. It may be characterized in that a line connecting the center of each other is formed at a position 90 degrees apart.
According to this configuration, the place where the screw is fixed can be reliably separated from the position where the through hole is formed, and the screw is not driven into the hole on the floor surface or the wall surface formed near the through hole. can do.

According to the pipe construction method according to the present invention, the connection joint according to any one of claims 1 to 6 is used, and the pipe is disposed in the room and the outer pipe disposed under the floor or outdoors. In the construction method in which the antifreeze body is arranged around both the outer pipe and the inner pipe while connecting the inner pipe, the first joint portion and the antifreeze body of the connection joint are simply passed through the floor or wall surface. The outer pipe is connected to the first joint part, the inner pipe is connected to the second joint part, and the antifreezing body is passed through the through hole, so that the outer pipe and the inner pipe are connected. A feature is that a single antifreeze body is arranged under the floor or between the outside and the room for both pipes.
According to this method, the conventional problem that separate antifreeze bodies must be used for the underfloor and the room can be solved, and the antifreeze function at the connection joint portion can be sufficiently secured.

According to the pipe construction method according to the present invention, using the connection joint according to any one of claims 1 to 6, an outer side disposed under the floor or outdoors and provided with an antifreeze body. In the construction method for connecting the pipe and the inner pipe disposed in the room, a hole is formed on the floor surface or wall surface so as to penetrate the first joint portion and the antifreeze body on the floor. A pipe holder and an antifreeze body are inserted into the hole formed in the floor or wall surface and protruded into the room, the outer pipe protruded into the room is cut at a predetermined length, and an antifreeze body protruding into the room is provided. The outer pipe is inserted into the through hole of the connection joint, and the cut outer pipe is connected to the first joint, and the flange is fixed to the floor or wall surface with screws, and the inner pipe is connected to the second joint. It is characterized by connecting.
According to this method, construction can be easily performed even with an outer pipe on which an anti-freezing body is mounted in advance.

The connection joint according to any one of claims 1 to 6, wherein the anti-freezing body is a heater wire accommodated in a tubular heater sheath and penetrates the flange portion. The heater sheath or pipe may be fitted into the hole.
According to this method, the construction is easy even if the heater wire is housed in a cylindrical heater sheath.

According to the pipe construction method according to the present invention, using the connection joint according to any one of claims 1 to 6, an outer pipe arranged under the floor or outdoors, and arranged indoors. In the construction method for connecting the inner pipe to the inner pipe, a hole is formed in the floor surface or wall surface so as to penetrate the first joint portion and the antifreeze body of the connection joint, and the outer pipe is connected to the floor surface or wall surface. The outer pipe that is inserted into the hole drilled in the chamber and protruded into the room, the outer pipe that is projected into the room is cut at a predetermined length, the cut outer pipe is connected to the first joint portion, and the flange portion is connected to the floor surface. Alternatively, it is fixed by screwing to a wall surface, an inner pipe is connected to the second joint portion, and an antifreezing body is inserted through the through hole of the connection joint from the indoor side.
According to this method, even if it is a piping structure comprised by the conventional branch piping method, the installation work of a freeze prevention body can be performed easily.

  According to the connection joint and piping construction method according to the present invention, it is possible to easily perform the construction work of the freeze prevention body. In addition, since the antifreezing body can be used in common for both the outer and inner pipes, it is possible to contribute to cost reduction without increasing the number of antifreezing bodies. Furthermore, it is possible to improve the maintainability and prevent the connection joint portion from freezing.

It is a side view which shows the external appearance structure of the connection joint which concerns on this invention. FIG. 3 is a plan view of a first embodiment of a connection joint. It is sectional drawing which shows the internal structure of a connection joint. It is explanatory drawing which shows the example of external piping. It is a top view of 2nd Embodiment of a connection joint. It is a top view of 3rd Embodiment of a connection joint. It is a top view of 4th Embodiment of a connection joint. It is a top view of 5th Embodiment of a connection joint. It is a top view of 6th Embodiment of a connection joint. It is a top view of 7th Embodiment of a connection joint. It is explanatory drawing explaining the case where a round hole is opened in a floor surface. It is explanatory drawing which shows the place which made the external piping and the sheath for heaters approach the room | chamber interior with the heat insulation pipe | tube from under the floor. It is explanatory drawing which shows the place which cut | disconnected external piping and attached the connection joint. It is explanatory drawing explaining the operation | work which fixes a connection joint to a floor surface. It is explanatory drawing explaining the drilling of a floor surface. It is explanatory drawing which shows the place which made the external piping and the sheath for heaters approach into the room from under the floor. It is explanatory drawing which shows the place which cut | disconnected external piping and attached the connection joint. It is explanatory drawing which shows the place which mounts a connection joint on a floor surface by inserting the sheath pipe | tube for heaters into a through-hole. It is explanatory drawing which shows the place which screws a connection joint and fixes to a floor surface. It is explanatory drawing which shows the place which used the connection joint of this invention by the branch piping method. It is explanatory drawing which shows the place which used the connection joint of this invention by the header construction method.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
1 to 2 show the external configuration of the connection joint of the present invention, FIG. 3 shows the internal configuration of the connection joint, and FIG. 4 shows the configuration of the external water pipe of this embodiment. In addition, the connection joint in this embodiment shall be used when connecting the external water pipe under the floor to an indoor apparatus.
The connection joint 30 has a first joint portion 32 that connects an external water pipe under the floor and a second joint portion 34 that connects an indoor water pipe in the room, and connects the external water pipe and the internal water pipe. It has the function to do.
A flange portion 36 that protrudes outward is formed around the uppermost portion of the second joint portion 34 that is the indoor side end portion of the connection joint 30. The flange portion 36 has a function for fixing to the floor surface.

In the present embodiment, a resin pipe 40 formed of a synthetic resin such as polybutene or cross-linked polyethylene is employed as the external water pipe under the floor. Here, the configuration of such an external water pipe will be described.
In order to prevent the resin tube 40 from freezing, a heater wire 42 is disposed along the resin tube 40. The heater wire 42 is accommodated in a heater sheath tube 44 formed in a corrugated shape. The heater sheath 44 and the resin tube 40 are covered with a heat insulating tube 46 that integrally covers the heater sheath 44 and the resin tube 40. The heat insulating tube 46 is preferably formed of a foamed resin material or the like.
The heater wire 42 may be a thermostat type or a self-control type.

Thus, the 1st joint part 32 which connects the resin pipe 40 of a synthetic synthetic resin employ | adopts the structure of a well-known one-touch mounting | wearing type.
The structure of the 1st joint part 32 which is this one-touch mounting | wearing type is demonstrated.
As shown in FIG. 3, the first joint portion 32 has a double structure including an outer peripheral portion 50 disposed on the outer periphery of the resin tube 40 and a metal communication tube 52 that enters the inside of the resin tube 40. It has become. The communication pipe 52 is configured to be connected to the second joint portion 34 upward. The communication pipe 52 may be formed integrally with the second joint portion 34.

  On the inner wall surface 50 a of the outer peripheral portion 50 of the first joint portion 32, a metal check claw 54 that protrudes in the direction in which the resin tube 40 enters is disposed. For this reason, when the resin tube 40 is inserted into the first joint portion 32 and then pulled in the direction in which the resin tube 40 is pulled out, the check pawl 54 pierces the outer peripheral surface of the resin tube 40 and prevents the resin tube 40 from coming off. Become.

  The one-touch mounting structure is not limited to the above-described structure, and various structures such as a mechanical type, a fusion type, and a diameter expansion type can be employed.

On the other hand, a metal pipe 49 such as stainless steel is used for the indoor water pipe on the indoor side. A screw groove is cut in the outer wall surface at the end of the metal tube 49.
And the 2nd joint part 34 which connects the metal pipe 49 employ | adopts the normal connection pipe structure by which the thread groove 55 which can be screwed together with the metal pipe 49 was cut inside.

Next, the configuration of the flange portion will be described.
The flange portion 36 is provided with a plurality of screw holes 38 into which screws are inserted in order to be screwed to the floor surface.
Further, the flange portion 36 is formed with a through hole 41 through which the antifreezing body (in this embodiment, the heater wire 42 and the heater sheath 44) is inserted into the room from under the floor. The through hole 41 is formed in a round hole shape.

The screw holes 38 of the present embodiment are formed at three locations and are arranged at equal intervals. That is, they are formed so as to be shifted from each other by 120 degrees with respect to the center of the flange portion 36. Each screw hole 38 is a round hole.
Of the three screw holes 38, the two screw holes 38a close to the through hole 41 are from the line Y1 connecting the center O1 of the second joint portion 34 and the center O2 of the through hole 41 to the center O3 of the screw hole 38a. And the center Y1 of the second joint portion 34 are arranged so that the line Y2 is 60 degrees apart.

  When the connection joint 30 having such a configuration is fixed to the floor surface, the builder has a hole having a diameter large enough to allow the first joint portion 32 and the heater sheath 44 to be simultaneously inserted (see FIG. 2). It is necessary to drill the dotted line C). However, the hole A in which both the first joint portion 32 and the heater sheath 44 can be inserted simultaneously may be smaller in diameter than the arrangement positions of the three screw holes 38 formed in the flange portion 36. Necessary. This is because if the hole C is in the position of the screw, it cannot be fixed to the floor surface by the screw.

(Second Embodiment)
Next, FIG. 5 shows a second embodiment in which the structure of the flange portion is different from the above-described embodiment. In the second embodiment, the constituent elements other than the shape of the through hole are the same as the constituent elements of the first embodiment, and thus the description of the same constituent elements is omitted.
In the flange portion 36, the through hole 41 is formed by being cut out at the outer edge of the flange portion 36, and a portion existing inside the flange portion 36 has a substantially circular shape and a shape that is linear at a portion in contact with the outer edge.

The screw holes 38 of the present embodiment are formed at three locations and are arranged at equal intervals. That is, they are formed so as to be shifted from each other by 120 degrees with respect to the center of the flange portion 36.
Of the three screw holes 38, the two screw holes 38a close to the through hole 41 are from the line Y1 connecting the center O1 of the second joint portion 34 and the center O2 of the through hole 41 to the center O3 of the screw hole 38a. And the center Y1 of the second joint portion 34 are arranged so that the line Y2 is 60 degrees apart.
Further, of the three screw holes 38, two screw holes 38 a close to the through hole 41 are formed by being cut out at the outer edge of the flange portion 36. One screw hole 38b at a position facing the through hole 41 with the second joint portion 34 interposed therebetween is not cut out at the outer edge of the flange portion 36, and forms a closed circle.

The screw hole 38 is formed in this way for the following reason.
That is, on the floor surface where the through hole 41 is disposed, the heater wire 42 and the heater sheath tube 44 need to protrude from below the floor, so that at least a hole through which the heater sheath tube 44 can be inserted (see FIG. 5). It is necessary to drill the dotted line A). It is preferable that the hole A on the floor surface has a diameter with a certain margin, not a diameter that allows the heater sheath or tube 44 to be inserted through.
Further, in order to place the first joint portion 32 of the connection joint 30 under the floor, it is also necessary to make a hole (a dotted line B in FIG. 5) through which the first joint portion 32 can be inserted in the floor surface.
Therefore, it is also anticipated that the installer drills a hole (dotted line C in FIG. 5) through which both the first joint portion 32 and the heater sheath 44 can be inserted simultaneously.

As shown in FIG. 5, the hole C through which both the first joint portion 32 and the heater sheath 44 can be inserted simultaneously is an elliptical or egg-shaped hole that swells greatly toward the through hole 41 side. For this reason, there is a possibility that the screw hole 38a located close to the through hole 41 is caught in the oval or oval hole.
If the screw hole 38a is caught in the oval or egg-shaped hole C, the flange 36 cannot be fixed because the screw does not reach the floor surface.
Therefore, by making the two screw holes 38a close to the through hole 41 into a shape cut out at the outer edge of the flange portion 36, even if the screw hole 38a is covered with the oval or oval hole C, The screws can be tilted diagonally so that they can be fixed to the floor surface outside the hole C.

  The two screw holes 38a close to the through hole 41 are connected to the center O3 of the screw hole 38a and the second joint portion 34 from the line Y1 connecting the center O1 of the second joint portion 34 and the center O2 of the through hole 41. The line Y2 connecting the center O1 may be separated by 60 degrees or more.

(Third embodiment)
Next, FIG. 6 shows a third embodiment in which the shape of the through hole is different from the above-described embodiment.
In the third embodiment, the constituent elements other than the shape of the through hole are the same as those in the first and second embodiments, and thus the description of the same constituent elements is omitted.
The through-hole 41 shown here is formed by being cut out at the outer edge of the flange portion 36, and has a substantially square shape when the cut-out outer edge portions are connected by a straight line. By adopting such a shape, a slight gap is generated in the circular sheath for the heater 44, but since the outer periphery of the sheath for the heater 44 can be held in a straight line portion, the heater sheath and the tube 44 can be prevented from being displaced. Has the effect of.

(Fourth embodiment)
Next, FIG. 7 shows a fourth embodiment in which the shape of the through hole is different from the above-described embodiments.
In the fourth embodiment, the components other than the shape of the through hole are the same as the components of the first to third embodiments, and thus the description of the same components is omitted.
The through-hole 41 shown here is formed by being cut out at the outer edge of the flange portion 36, and forms a substantially trapezoid when the cut-out outer edge portion is connected by a straight line. By adopting such a shape, even if the heater sheath 44 is deformed or not circular, the heater sheath 44 can be easily inserted.

(Fifth embodiment)
Next, FIG. 8 shows a fifth embodiment in which the position of the screw hole is different from each of the embodiments described above.
In the fifth embodiment, the shape of the through hole is the same as that described in the second embodiment, and the constituent elements other than the screw holes are the same as the constituent elements of the second and third embodiments. Therefore, the description of the same components is omitted.
In the present embodiment, the three screw holes 38 are not arranged at equal intervals.

The position of the closed circular screw hole 38b is a position facing the through hole 41 and the second joint portion 34. This is the same position as the embodiment described above.
The two screw holes 38a located close to the through hole 41 are formed by being cut out at the outer edge of the flange portion 36, and are located farther from the through hole 41 than in the embodiment described above.
Specifically, the two screw holes 38a close to the through hole 41 are formed from the line Y1 connecting the center O1 of the second joint portion 34 and the center O2 of the through hole 41 with the center O3 of the screw hole 38a and the second joint. The line Y2 connecting the center O1 of the portion 34 is provided so as to be 90 degrees apart. Accordingly, the two screw holes 38a are at positions facing each other with the second joint portion 34 interposed therebetween.
With this configuration, by placing the screw hole 38a adjacent to the through hole 41 at a position away from the through hole 41, the screw hole 38a can be prevented from being applied to the hole C on the floor surface as much as possible. The part 36 can be securely fixed to the floor surface.

(Sixth embodiment)
Next, FIG. 9 shows a sixth embodiment in which the shape of the through hole is different from that of the fifth embodiment described above.
In the sixth embodiment, the shape of the through hole is different from that of the fifth embodiment, but the other components are the same as the components of the fifth embodiment, so the same components will be described. Is omitted.
The through hole 41 of the present embodiment is not cut out at the outer edge of the flange portion 36 and has a closed circular shape. For this reason, although it may take time to insert the sheath for the heater 44, the sheath for the heater is surely held.

(Seventh embodiment)
Furthermore, FIG. 10 shows a seventh embodiment in which the shape of the through hole is different from the fifth embodiment described above.
In the seventh embodiment, the shape of the through hole is different from those of the fifth and sixth embodiments, but the other components are the same as the components of the fifth and sixth embodiments, so that they are the same. The description of these components is omitted.
The through hole 41 of the present embodiment has a shape in which the outer edge of the flange portion 36 is linearly cut out, and has a shape close to a semicircle.
By adopting such a shape, the material cost of the connection joint 30 can be reduced, and processing is easy.

(Construction method)
Next, a pipe construction method for connecting the resin pipe 40 under the floor and the metal pipe 49 in the room using a connection joint having a round through hole will be described with reference to FIGS.
First, work to make holes in the floor. As shown in FIG. 11, in this work, marking of the attachment position of the connection joint 30 is performed on the floor surface. Then, a hole C having a size through which both the sheath for the heater 44 and the first joint portion 32 can be inserted is formed with the summing center as a center.

  Next, as shown in FIG. 12, the heater sheath tube 44 and the resin tube 40 are inserted into the hole C drilled earlier together with the heat insulating tube 46, and the heater sheath tube 44 and the resin tube 40 are inserted into the room. At this time, if the sheath for the heater 44 and the resin tube 40 are pulled in by 300 mm or more, the subsequent operation becomes easy.

Next, the heat insulating tube 46 is cut to a length that fits under the floor. Since the heat insulating pipe 46 is made of a foamed resin material or the like, the cutting can be easily cut by tearing with a finger.
Then, as shown in FIG. 13, the resin tube 40 is cut to a predetermined length, and the first joint portion 32 of the connection joint 30 is attached to the distal end portion of the resin tube 40. At this time, the sheath for the heater 44 is passed through the through hole 41 of the flange portion 36.
Further, the mounting of the connection joint 30 to the resin tube 40 is completed simply by pushing. At this time, it is confirmed that the non-removing check pawl 54 is securely stuck in the resin tube 40.

Subsequently, as shown in FIG. 14, the upper end portion of the heat insulating pipe 46 is pulled up to the lower surface of the flange portion 36 of the connection joint 30. Thereby, the heat insulation around the 1st joint part 32 can be ensured.
Further, the tape 59 is wound around the upper end portion of the heat insulating tube 46 so that the upper end portion of the heat insulating tube 46 does not come off from the periphery of the first joint portion 32.
Then, the connection joint 30 is placed on the floor 56, and the screw is fixed toward the floor 56 from the screw hole 38.

  After the connection joint 30 is fixed to the floor 56, the indoor metal pipe 49 is connected to the second joint portion 34 of the connection joint 30. After connecting the indoor metal pipe 49, the heater sheath pipe 44 protruding into the room from the through hole 41 is taped to the metal pipe 49. This is to prevent the heater sheath 44 from dropping from the through hole 41 to the floor.

(Other embodiment of construction method)
Next, a pipe construction method for connecting the resin pipe 40 under the floor and the metal pipe 49 in the room using a connection joint in which the through hole is cut out at the outer edge of the flange portion will be described with reference to FIGS. I will explain.
First, as shown in FIG. 15, an operation of making a hole in the floor surface is performed. In this operation, first, the attachment position of the connection joint 30 is marked on the floor surface. Then, a hole A through which the sheath for the heater 44 is inserted is formed at a position away from the summing center by a predetermined distance. Subsequently, a hole B having a diameter into which the first joint portion 32 can be inserted is formed around the center of the ink.
However, as described above, an elliptical or oval hole (for example, hole C in FIG. 5) having a size that allows both of the heater sheath 44 and the first joint portion 32 to be inserted may be formed. .

  Subsequently, as shown in FIG. 16, the heater sheath tube 44 and the resin tube 40 are inserted into the holes A and B drilled earlier, and the heater sheath tube 44 and the resin tube 40 are inserted into the room. At this time, the heat insulation pipes 46 arranged around the heater sheath pipe 44 and the resin pipe 40 are cut at the lower surface of the floor.

  Next, as shown in FIG. 17, the resin tube 40 is cut into a predetermined length, and the first joint portion 32 of the connection joint 30 is attached to the distal end portion of the resin tube 40. The attachment of the connection joint 30 to the resin pipe 40 is completed simply by pushing. At this time, it is confirmed that the non-removing check pawl 54 is securely stuck in the resin tube 40.

Then, as shown in FIG. 18, the heater sheath 44 is fitted into the through hole 41, and the connection joint 30 is placed on the floor 56. Then, the screw is first screwed with the closed circular screw hole 38b, and then screwed at two positions of the cut screw hole 38a. First, it can be securely fixed by screwing with a circular screw hole 38b (see FIG. 19).
Thereby, the operation | work which piping the resin pipe 40 under a floor to a floor surface is complete | finished.
Thereafter, an operation of filling the gap between the heat insulation pipe 46 under the floor and the lower surface of the floor or connecting the indoor metal pipe 49 to the second joint portion 34 of the connection joint 30 is performed (not shown).

  In the construction method described above, the case where the antifreezing body is provided in the outer pipe has been described. However, even if the antifreezing body is not provided in the outer pipe, the connection joint 30 is attached to the floor or the wall surface. After that, it is also possible to pass the antifreeze body from the indoor side to the lower floor side or the outdoor side.

(Effects of differences in underfloor piping method)
In addition, by using the connection joint of the present invention, it is possible to exhibit excellent effects regardless of which of the conventional piping method and the latest piping method.
FIG. 20 shows a case where the connection joint of the present invention is adopted when the underfloor piping is a conventional branch piping method. According to this, even if it is a case where underfloor piping is carried out by the branch piping method, the antifreezing body 42 can be installed from the indoor side through the through hole 41. That is, in the case of piping by the conventional construction method, in the case of a low floor (underfloor is 10 to 20 cm), the antifreeze body 42 cannot be laid from under the floor, but by using the connection joint of the present invention, The anti-freezing body 42 can be laid from the inside.

  On the other hand, FIG. 21 shows a case where the connection joint of the present invention is adopted when the pipe under the floor is the header pipe construction method. According to this, the anti-freezing body 42 can be laid from the indoor side through the through hole 41 without an underfloor inspection port. In addition, the place where the water supply is most likely to freeze is in the vicinity of the joint on the floor surface, and it is necessary to insert the full length of the antifreeze body from the header 57 side. If laid on the side, the length of the antifreezing body 42 can be shortened, which contributes to cost reduction. Furthermore, when using the anti-freezing body 42, a power strip on the indoor side can be used, and there is no need to provide a power strip under the floor, so that incidental work for providing the power strip can be reduced.

(Other embodiments)
In each of the embodiments described above, connection of the water pipe between the under floor and the room has been described. However, the pipe to be connected is not limited to a water pipe, and may be a hot water pipe or the like.
Further, such a connection joint may be provided not only on the floor surface but also on a wall surface, and an outdoor pipe and an indoor pipe may be connected on the wall surface. Thus, when providing in a floor surface and a wall surface, an elbow shape may be sufficient as a connection joint.

Further, the outdoor piping is not limited to the resin pipe, and may be a metal pipe. In such a case, the first joint portion may be a screw-in type structure instead of a one-touch type mounting structure as in the present embodiment.
Furthermore, when the indoor pipe is a resin pipe made of a synthetic resin such as polybutene or cross-linked polyethylene, a structure in which the second joint portion on the indoor side can be attached in a one-touch manner may be used.

  Furthermore, in the embodiment described above, the example in which the heater wire is accommodated in the sheath for the heater has been described as an example of the antifreezing body. However, the anti-freezing body may be a belt-like one that is wound around a pipe instead of such a heater wire.

  While the present invention has been described in detail with reference to a preferred embodiment, the present invention is not limited to this embodiment and, of course, many modifications can be made without departing from the spirit of the invention. It is.

30 connecting joint 32 first joint part 34 second joint part 36 flange part 38 screw hole 40 resin pipe 41 through hole 42 heater wire 44 sheath tube for heater 46 heat insulation pipe 49 metal pipe 50 outer peripheral part 50a inner wall surface 52 communication pipe 54 reverse Claw 55 Thread groove 56 Floor 57 Header 59 Tape

Claims (11)

In a connection joint that is attached to a floor surface or a wall surface and connects an outer pipe disposed under the floor or outdoors and an inner pipe disposed indoors,
A first joint to which the outer pipe is connected;
A second joint to which the inner pipe is connected;
A flange portion that protrudes in the radial direction and has a plurality of screw holes for screwing to a floor surface or a wall surface;
A connecting joint, characterized in that a through-hole for allowing the antifreezing body to pass therethrough is formed in the flange portion under the floor or between the outside and the room.   The connection joint according to claim 1, wherein the through hole is a round hole.   The connection joint according to claim 1, wherein the through hole is formed by being cut out at an outer edge of the flange portion.   4. The screw hole adjacent to at least the through-hole among the plurality of screw holes is formed by being cut out at an outer edge of the flange portion. 5. The described connection fitting. Among the plurality of screw holes, a screw hole adjacent to the through hole is
A line connecting the center of the screw hole and the center of the second joint portion is formed at a position separated by 60 degrees or more from the line connecting the center of the second joint portion and the center of the through hole. The connection joint according to any one of claims 1 to 4. Among the plurality of screw holes, a screw hole adjacent to the through hole is
A line connecting the center of the screw hole and the center of the second joint portion is formed at a position 90 degrees away from a line connecting the center of the second joint portion and the center of the through hole. The connection joint according to claim 5. Using the connection joint according to any one of claims 1 to 6, the outer pipe arranged under the floor or outdoors and the inner pipe arranged indoors are connected, and the outer pipe and the inner pipe are connected. In the construction method that arranges anti-freezing bodies around both pipes,
Drilling a hole on the floor or wall surface so that the first joint portion of the connection joint and the antifreeze body penetrate,
Connecting the outer pipe to the first joint,
Connecting the inner pipe to the second joint,
By placing the antifreeze body through the through hole, a single antifreeze body that is continuous under the floor or between the outdoor and the indoor is arranged for both the outer pipe and the inner pipe. Characteristic piping construction method. Using the connection joint according to any one of claims 1 to 6, an outer pipe disposed under the floor or outdoors and provided with an anti-freezing body, and an inner pipe disposed indoors In the construction method to connect
Drilling a hole on the floor or wall surface so that the first joint portion of the connection joint and the antifreeze body penetrate,
The outer pipe and the antifreezing body are inserted into the hole drilled in the floor surface or wall surface and protruded into the room,
Cut the outer pipe protruding into the room at a predetermined length,
Insert the antifreezing body protruding into the room through the through hole of the connection joint,
Connect the cut outer pipe to the first joint part,
Fix the flange part to the floor or wall surface with screws,
A pipe construction method comprising connecting an inner pipe to the second joint portion. Using the connection joint according to any one of claims 1 to 6,
The anti-freezing body is a heater wire housed in a tubular heater sheath.
The pipe construction method according to claim 8, wherein the sheath for the heater is fitted into the through hole of the flange portion. In the construction method for connecting the outer pipe disposed under the floor or outdoors and the inner pipe disposed indoors using the connection joint according to any one of claims 1 to 6,
Drilling a hole on the floor or wall surface so that the first joint portion of the connection joint and the antifreeze body penetrate,
The outer pipe is inserted into the hole drilled in the floor or wall surface and protrudes into the room,
Cut the outer pipe protruding into the room at a predetermined length,
Connect the cut outer pipe to the first joint part,
Fix the flange part to the floor or wall surface with screws,
An inner pipe is connected to the second joint,
A pipe construction method, wherein an antifreezing body is inserted into a through hole of the connection joint from the indoor side. Using the connection joint according to any one of claims 1 to 6,
The anti-freezing body is a heater wire housed in a tubular heater sheath.
The pipe construction method according to claim 10, wherein the heater sheath is fitted into the through hole of the flange portion.