JP3624340B2 - Branch pipe fittings and their assembly methods - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a branch-type pipe joint or the like for connecting a large-diameter water supply main pipe and a small-diameter nozzle branch pipe in a snow extinguishing system, that is, a low-pressure and small-diameter pipe-type pipe joint, and its assembly It is about the method.
[0002]
[Prior art]
In general, a snow melting system using a snow-melting pipe to melt snow on a road is known.
[0003]
This is a system that pumps ground water, river water, sea water, etc., and melts the water by spraying it on the road surface through a water main that is buried under the road surface and a snow-melting nozzle exposed on the road surface.
[0004]
As is well known, such a snow melting system can be unmanned in combination with a snowfall detection device, can naturally flow out by melting snow, has a short time from the start of water sprinkling to snow melting, and is well known. Because it is exposed, it is said that there are features such as being less likely to cause traffic accidents such as slips and snow removal even on narrow roads.
[0005]
Therefore, many proposals have been made regarding such a snow melting system (for example, Japanese Patent Publication No. 53-36932, Japanese Patent Laid-Open No. 58-54110, Japanese Patent Laid-Open No. 2-26118, Japanese Patent Laid-Open No. 8-13440, JP, 9-158142, A, JP 10-311013, etc.).
[0006]
Among these snow melting system proposals, in particular, regarding a branch pipe type joint for connecting a water main pipe and a nozzle branch pipe orthogonally, one proposal is made in the above-mentioned JP-A-9-158142. However, in this kind of general branch pipe joint, the following branch pipe joint shown as the prior art of this publication is implemented.
[0007]
In addition, a branch pipe is a short pipe with a flange and a socket used when a small diameter pipe (mounting pipe) is installed by making a hole in a large diameter pipe (sewage main pipe), and is also called a socket. It is what.
[0008]
That is, in FIG. 4, 1 is a water supply main pipe (large-diameter pipe), and a hard vinyl chloride pipe (JIS standard VP pipe, abbreviated as a PVC pipe) is used. Various types of up to 200 mmφ are used. The ends of the water supply main pipe 1 are connected to a pump and a drain groove (not shown), respectively.
[0009]
In this water supply main pipe 1, a PVC flanged socket pipe (a pipe body having a smaller diameter and a shorter diameter (25 mm in length) than the water supply main pipe 1) 2A is inserted into a connection hole 1A drilled by a hole saw. The outer peripheral base of the socket tube 2A and the periphery of the connection hole 1A of the water supply main pipe 1 are welded by welding using a plurality of triangular plate-like joint materials 50, or the crossing portion of the socket pipe 2A and the water supply main pipe 1 is used. By welding, the socket pipe 2A is fixed to form a branch pipe type joint 3A.
[0010]
Note that a nozzle branch pipe (small diameter pipe) 4 made of a VP pipe having a nominal diameter of 16 mmφ (having a diameter smaller than that of the main water supply pipe 1) is simply inserted and connected to the socket pipe 2A. A snow making nozzle 5 is connected, and the head upper surface of the snow removing nozzle 5 is exposed to the road surface 6.
[0011]
Further, the water supply main pipe 1, the branch pipe 4, the socket pipe 2A, and the portion other than the head surface of the snow extinguishing nozzle 5 are, for example, a square-shaped concrete block body 7 having a height of 370 mm, a width of 400 mm, and a total length of about 5 m. It is embedded and hardened in a single snow melting system material.
[0012]
Therefore, at the construction site, these square-shaped concrete block bodies 7 are brought in, and these are sequentially connected in a groove excavated in the center of a road (approx. It is buried and constitutes a snow melting system.
[0013]
[Problems to be solved by the invention]
However, in the snow melting system material as described above, the PVC pipe method is used to fix and stand the branch pipe joint 3A used therefor on the water supply main pipe 1, so that the factory for concrete products, etc. However, since it requires a welding machine such as a hot air gun and requires its welding technique, there is a problem in workability. In particular, the total length of burying of such a snow melting system is 300 m to 1000 m or more. Since the installation pitch of the snow extinguishing nozzles 5 is about 1 m, it is an installation operation for a large number of branch pipe joints 3A, which greatly impedes productivity.
[0014]
In addition, the proposal shown in the above-mentioned Japanese Patent Application Laid-Open No. 9-158142 adopts a socket tube with a flange made of polyvinyl chloride in view of anxiety of PVC welding strength, and this socket tube with a flange is used as a general PVC main tube. ° Adopts a method of adhering and bonding to the outer surface of the water main so that the branch pipe is joined.
[0015]
However, since the proposed branch joint made up of socket pipes with flanges uses an adhesive bonding method, this method is to apply the adhesive evenly, then quickly bond it, and then bind and temporarily fix it. Since it is a method of leaving for time, it requires skill to apply and bond, and there is also a curing time, which also hinders productivity.
[0016]
Therefore, the present invention intends to solve such a problem.
[0017]
[Means for Solving the Problems]
In order to achieve such an object, the present invention provides: 1) a connection hole 1A for a small diameter branch pipe 4 made of polyvinyl chloride is formed in the large diameter water supply main pipe 1 made of polyvinyl chloride, and then provided to the socket pipe 2 made of vinyl chloride for the branch pipe 4; The upper connecting portion where the locking portion 13 is locked and erected using its elasticity, and the lower mounting in which the outer periphery of the lower end bulges to the inner surface side of the water supply main pipe 1 by pressing the substantially short cylindrical presser 10 The elastic thick-walled color body 8 formed integrally with the foot is pressed into the connecting hole 1A with the hand, and then the base side of the socket tube 2 is pushed into the color body 8 with the hand. The stopper 13 is locked to be connected, and the outer periphery of the lower end of the color body 8 is bulged to the inner surface side of the water supply main pipe 1 to prevent the color body 8 from being detached and bonded. Without joining or the like, a large number of the branch pipes 4 that connect the snow-dissipating nozzle 5 are erected efficiently in the water supply main pipe 1 that is installed horizontally. Concrete sides - located on the assembling method of the branch pipe shape fitting for use in snow-melting system material characterized by preparative hardened, and 2) PVC diameter branch pipes 4 bored in PVC large径送water main pipe 1 The upper connecting portion in which the locking portion 13 provided in the PVC socket tube 2 for the branch pipe 4 is locked and erected using its elasticity and the substantially short cylindrical presser 10 is pushed into the connecting hole 1A. An elastic thick-walled color body 8 integrally formed from a lower mounting foot portion whose lower end outer periphery bulges to the inner surface side of the water supply main pipe 1 is pushed in with a hand, and the lower mounting foot is swollen and attached. The socket tube 2 for connecting the snow-dissipating nozzle 5 is pushed into the body 8 to lock the locking portion 13, and the outer periphery of the lower end of the color body 8 is moved by the presser 10 to the water supply main pipe 1. The branch pipe is bulged to prevent the collar body 8 from being pulled out, and without adhesive bonding or the like. There are a large number in the branch pipe joints used for the snow melting system material characterized in that the water supply main pipe 1 installed in the horizontal direction is efficiently erected and the periphery thereof is consolidated and hardened. 3) Made of PVC The engaging portion 13 provided on the PVC socket tube 2 for the branch pipe 4 for connecting the snow-dissipating nozzle 5 to the connecting hole 1A for the small diameter PVC branch pipe 4 formed in the large-diameter water supply main pipe 1 is elastic. Elastically formed integrally from an upper joint portion that is locked and erected by using an upper portion and a lower mounting foot portion in which the outer periphery of the lower end bulges to the inner surface side of the water supply main pipe 1 by pushing the substantially short cylindrical retainer 10. The thick color body 8 is pushed in and attached by the hand, and the outer periphery of the lower end of the color body 8 is formed by the substantially short cylindrical presser 10 integrally formed at the lower end of the socket tube 2 with the water supply main 1 The branch pipe 4 is bulged to the inner surface side of the tube to prevent the collar body 8 from being pulled out, and without adhesive bonding or the like. In the branch pipe type joint used for the snow melting system material characterized in that the water supply main pipe 1 installed in the horizontal direction is efficiently erected and its periphery is consolidated and hardened. The gist of the present invention is a branch pipe joint in which the restriction ring member (29) surrounding the color body 8 according to Item 2 or 3 is provided.
[0018]
Accordingly, the present invention includes the following embodiments.
(A) After a connecting hole for a small-diameter branch pipe is drilled in a large-diameter pipe, a color body made of an elastic body is pushed into the connection hole without a pushing tool, and then the branching is performed on the color body. By pressing and locking the base side of the tube to bring it into a connected state, the lower end of the color body is bulged to the inner surface side of the large-diameter tube to prevent the color body from being removed, and adhesive bonding Assembling method of branch pipe joints that connect a small diameter pipe to a large diameter pipe without any equality.
[0019]
(B) A method of assembling a branch pipe joint in which the socket pipe is pushed and locked to the color body and a small-diameter pipe is connected to the socket pipe in (a).
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail with reference to embodiments shown in the accompanying drawings.
1 is an exploded perspective view of a branch pipe joint according to an embodiment of the present invention, FIG. 2 is an overall explanatory view of FIG. 1, and FIG. 3 is a partial embodiment of FIG. Since the parts common to the conventional example are omitted, the omitted parts need to be supplemented.
[0021]
First, after explaining the structure of the branch pipe type joint 3 of this embodiment, the assembling method will be described.
[0022]
This branch pipe joint 3 is applied to a snow melting system using a snow-melting pipe in order to melt snow on the road. In this snow melting system, the nominal diameter of the water supply main pipe 1 is large or small in the amount of water supplied. , it includes the various 50Mmfai～200mmfai, also ground water by the pump, pressure of river water, etc. has become a degree of about 5 kg / cm ² (low pressure), also nominal diameter of the nozzle branch pipe 4 PVC pipe In the case of VP16, in the case of a steel pipe, a small diameter pipe of 22 mmφ is preferable.
[0023]
In these FIG. 1 and FIG. 2, a branch pipe joint (also called a branch saddle, which is different from the original branch pipe in this specification) 3 is a water supply pipe of this embodiment. A synthetic rubber (elastic body such as rubber) mounting base color body 8 fitted into a connecting hole 1A drilled in the main pipe 1 with a hole saw or the like, and the mounting base color body 8 The socket (receiving port) pipe 2 for the branch pipe that the base part is fitted inside to be locked and erected, and the mounting base color body 8 are pressed against the inner peripheral surface of the connecting hole 1A and sealed. And a thick-walled color body presser 10 that is expanded on the inner surface of the water supply main pipe 1 to form a bulging portion 9 for retaining (see FIG. 2C). .
[0024]
Therefore, this branch pipe-type joint 3 is used for the water supply main pipe 1 by the following operation while simultaneously performing the insertion set on the base side of the branch pipe 4 for nozzles, in particular, a pushing tool (for example, Japanese Patent Publication No. 57-12916). No.), adhesives, welding equipment, etc., and can be installed efficiently even by an amateur, even with a single touch, even with a large number of pieces. It did not decline.
[0025]
That is, for example, in a concrete product manufacturing factory, the diameter and direction (orthogonal direction) of the water supply main pipe 1 that is horizontally installed at a predetermined pitch are accurately adjusted by a hole saw at the top. A large number of connection holes 1A are drilled as described above (of course, when the water supply main pipe 1 is a metal pipe such as a steel pipe or a gas pipe, it is drilled with an electric drill).
[0026]
As shown in the lower figure of FIG. 2 (A), the mounting base color body 8 made of synthetic rubber is gripped by the hand and pushed from above into these connecting holes 1A. Set it.
[0027]
Next, the branch pipe socket tube 2 is further pushed into the synthetic rubber color body 8 in the direction a as shown in the upper view of FIG. 2A from above, and the lower end of the color body 8 is the water supply main pipe 1. It protrudes slightly on the inner surface.
[0028]
Of course, after the branch pipe socket tube 2 is pushed and set in the color body 8, the color pipe body 8 may be pushed into the connecting hole 1A by holding the branch pipe socket pipe 2 or the color body. The protrusion at the lower end of 8 may be formed by pushing the color body 8 alone into the connecting hole 1A.
[0029]
Next, as shown in FIG. 2 (B), a collar body presser 10 is pushed into the socket pipe 2 in the direction b, and the collar body presser 10 is further inserted from above by the nozzle branch pipe 4. When pushed, the collar body presser 10 presses the synthetic rubber collar body 8 against the inner peripheral surface of the connecting hole 1A as shown in FIG. A bulging portion 9 is formed on the inner surface side of the main pipe 1 to prevent the color body 8 and the branch pipe socket pipe 2 from being pulled out.
[0030]
In addition, the branch pipe joint 3 of the present embodiment has a short cylindrical collar body presser 10 for pressing the synthetic base mounting body collar body 8 so as to prevent a so-called wedge. As a separate body, it is confirmed that the branch pipe socket pipe 2 is locked and erected on the color rubber body 8 made of synthetic rubber. However, the present invention is not limited to this, and a short cylindrical presser is integrally formed at the lower end of the socket tube 2 so as to be connected to the collar body 8. At the same time as standing, the collar body 8 may be pressed by the pressing portion. In this case, the pressing work and the number of parts can be reduced.
[0031]
In addition, as described above, the base side of the nozzle branch pipe 4 is indirectly connected to the collar body 8 via the socket pipe 2 and the presser 10. If a part of the diameter is expanded by a blow molding method and the expanded diameter portion is directly pushed into the collar body 8 and locked, the socket tube 2 or the like becomes unnecessary if the reduction in work accuracy is sacrificed. Further, one-touch operation can be achieved for the branch pipe joint 3 used for hardening the periphery of the concrete.
[0032]
Further, the present invention can be easily applied to the case where the branch pipe 4 is piped obliquely upward with respect to the water supply main pipe 1.
[0033]
Next, the branch pipe type joint 3 will be described in detail by dividing it into "color body 8", "socket pipe 2" and "presser 10".
[0034]
First, the “color body 8”, particularly in the lower figures of FIG. 1 and FIG. 2A, this mounting base color body 8 is made of synthetic rubber, that is, an elastic body or an elastomer body. , Using synthetic rubbers with the same physical properties as those described in the appendix of the standard JWWAK127 (synthetic rubber constituting rubber rings for rubber rings for waterworks, etc.) and their aging (durability) It has excellent physical properties such as shape retention (hardness), sealability (sealability) and rubber elasticity.
[0035]
The color body 8 has a substantially short cylindrical shape having an outer diameter of 27 mmφ and an axial length of 20 mm, and is integrally formed from a large diameter portion 11 above and a small diameter portion 12 having an outer diameter of 22 mmφ below. .
[0036]
On the inner periphery of the upper large-diameter portion 11, a ring-shaped groove 14 is formed in which a ring-shaped locking portion 13 provided at the lower end of the branch pipe socket tube 2 is fitted using rubber elasticity.
[0037]
A lower bank of the groove 14 is formed in the stopper 15 and serves as a stopper for the socket tube 2 that has been pushed in.
[0038]
Further, a guide inclined surface 16 is formed at the inner peripheral upper end of the large-diameter portion 11 so that the socket tube 2 can be pushed by the hand.
[0039]
The outer diameter of the upper large-diameter portion 11 is larger than the connecting hole 1A (about 22 mmφ) and straddles the outer surface of the water supply main pipe 1 in a saddle shape.
[0040]
The outer diameter of the small-diameter portion 12 below is slightly smaller (about 1 mm) than the connecting hole 1A, and a pot-like ring locking portion 17 protrudes outward at the lower end of the outer periphery.
[0041]
This ring locking portion 17 provides temporary positioning and retaining when the color body 8 is pushed and set in the connecting hole 1A.
[0042]
Although the outer periphery of the lower small diameter portion 12 has the same diameter, a funnel-shaped reduced diameter portion 18 having a gentle downward slope is formed on the inner periphery following the stopper 15. As the user goes, by gradually pushing the collar body presser 10 into the reduced diameter portion 18 that is thick (for example, from 3 mm to 5 mm), the reduced diameter portion 18 is expanded to the same diameter, and excess Is protruded downward or outward, and as a result, a retaining bulging portion 9 is formed around the ring locking portion 17.
[0043]
Next, “socket tube 2”, particularly in FIG. 1 and FIG. 2 (A), this socket tube 2 is made of hard vinyl chloride (synthetic resin), and its dimensions are about 43 mm in axial length, outside the upper part. The diameter is about 29 mmφ, the lower outer diameter is about 22 mmφ, the upper inner diameter is about 22.5 mm, and the lower inner diameter is about 16 mmφ. When this is set on the color body 8, the socket pipe 2 is simply connected to the nozzle branch pipe 4. Even if it stands upright, it has a joining length (30 mm) that does not wobble. Therefore, it is larger than the TS junction length in a normal PVC pipe.
[0044]
That is, this is advantageous because the branch pipe 4 is erected (not horizontally installed) on the horizontally installed water supply main pipe 1 and is concretely solidified.
[0045]
The socket tube 2 has a substantially short cylindrical shape, and is integrally formed from a large-diameter joint 19 that occupies most of the socket tube 2 and a small-diameter mounting foot 20 at the base.
[0046]
The inner surface of the large-diameter joint portion 19 forms a small taper 21 whose diameter is enlarged upward on the opening side as in the TS joint structure, and is used for a nozzle having a standardized dimension (for example, an outer diameter of 16 mmφ) as a VP pipe. When the branch pipe 4 is pushed in, it is closely fitted.
[0047]
An abrupt taper locking portion 23 is formed following the taper 21, and the locking portion 23 serves as a stopper of the branch pipe 4 and also locks the pressed color body presser 10. Thus, the color body presser 10 is positioned or stoppered.
[0048]
Further, an abutting portion 24 that abuts on the upper end of the color body 8 is formed on the lower end of the outer periphery of the large-diameter joint portion 19.
[0049]
On the other hand, the ring-shaped locking portion 13 is formed on the outer periphery of the lower end of the small-diameter mounting foot portion 20. A taper surface tri is formed at the lower end corner of the ring locking portion 13 to smoothly push the socket tube 2.
[0050]
Next, “presser 10”. In particular, in the upper diagrams of FIGS. 1 and 2B, the collar body presser 10 is made of hard vinyl chloride (synthetic resin), and its dimensions are shafts. It has a length of about 25 mm and an outer diameter of about 16 mm. The flow area of the nozzle branch pipe 4 is the same as that of the nozzle to smooth the flow of water, and so-called rust prevention of the synthetic rubber collar body 8 is performed. I am doing so.
[0051]
The color body presser 10 has a substantially short cylindrical shape, and is integrally formed of a synthetic rubber presser 25 occupying most of the color presser and a bell mouth-like locking part 26 at the upper end.
[0052]
The inner diameter of the synthetic rubber pressing portion 25 is substantially the same as that of the nozzle branch pipe 4 as described above.
[0053]
On the other hand, the bell mouth-shaped locking portion 26 is formed on the same taper as the locking portion 23 of the abrupt taper of the socket tube 2 so that the collar body presser 10 and the socket tube 2 are intimately joined. I am doing so.
[0054]
The engaging portion 26 serves as a contact surface for the branch pipe 4, and the color body 8 ensures that the connecting hole 1 </ b> A is wedged simultaneously with the insertion of the branch pipe 4.
[0055]
Next, as shown in FIG. 3, the following saddle member 27 for reinforcement is used for the branch pipe joint 3 of the present embodiment.
[0056]
That is, when the nozzle branch pipe 4 is simply inserted into the branch pipe socket pipe 2 without using an adhesive and is erected, the color block body 8 is made of synthetic rubber, so that the concrete block body 6 is obtained. For this reason, when the concrete is placed and buried, the nozzle branch pipe 4 may fall or the upper end of the pipe may be swung. As a result, there is a possibility that the set position of the snow-fusing nozzle 5 may lack stability. Therefore, a reinforcing saddle member 27 is interposed between the outer periphery of the water supply main pipe 1 and the contact portion 24 of the socket pipe 2 so that the collar body 8 is externally fitted and surrounded.
[0057]
This reinforcing saddle member 27 is made of polypropylene (made of synthetic resin that can make good use of resin elasticity), and in the embodiment shown in FIG. 3, the dimension of the square outward flange 28 is 40 mm × 50 mm □. The winding tube 29 has a height of about 10 mm and matches the axial length of the large-diameter portion 11 of the color body 8, and the inner diameter thereof is the outer diameter of the large-diameter portion 11 of the color body 8. To match.
[0058]
The reinforcing saddle member 27 has a structure in which the winding pipe 29 is erected at the center of the square outward flange 28 as described above, and the lower ends of the outward flange 28 and the winding pipe 29 are shown in FIG. 3 (B) (a cross section of (A) as viewed in the direction of arrow a) The outer flange 28 is provided with thin strips 30 on both sides in the axial direction of the water supply main 1. It has a hinge function, and can be bent so as to correspond to the water supply main pipe 1 having different pipe diameters (various types from 50 mmφ to 200 mmφ) together with the PP material.
[0059]
Further, in order to provide the axial rigidity of the water supply main pipe 1 between the outward flange 28 and the winding pipe 29, a pair in the front-rear direction as shown in FIG. 3B (cross section taken along arrow b in FIG. 3A). The ribs 31, 31 are welded.
[0060]
The reinforcing saddle member 27 is set in advance by being fitted onto the collar body 8, and when the collar body 8 is pushed into the connecting hole 1A, it is straddled on the outer surface of the water supply main pipe 1 without an adhesive. Can do.
[0061]
Accordingly, the reinforcing saddle member 27 regulates the protrusion of the thick collar body 8 which is an elastic body to the outer periphery, and adjusts the posture of the branch pipe socket pipe 2 while ensuring the verticality of the small diameter pipe. It is also a push stopper that can be seen.
[0062]
Further, the reinforcing saddle member 27 may not be provided with the outward flange 28 but may be a restricting ring member constituted by a simple winding tube 29 only. As described above, the restriction ring member only restricts the protrusion of the color body 8 and can push the branch pipe socket pipe 2 mechanically.
[0063]
【The invention's effect】
According to the present invention, the branch pipe joint can be attached to the one-touch type by a hand, so that even an amateur can perform the operation. In addition, as long as the connection hole of the large-diameter water supply main can be accurately drilled, In particular, it is possible to ensure the reliability and the reliability of retaining and fixing.
[0064]
In particular, since the color body made of an elastic body is simply pushed by the hand, there is no need for welding technology, adhesion technology, or a pushing tool (in the present invention, the socket tube itself is a substitute for the pushing tool), Moreover, even if the direction of the opening of the connecting hole is not accurate, or when assembled in a direction slightly different from 90 ° unlike a general 90 ° branch pipe, this inaccuracy or slightly It is possible to absorb the change in direction of the product and suppress the occurrence of defective products.
[0065]
In addition, sealability and retaining and fixing are performed simultaneously to improve workability.
[0066]
Furthermore, when this branch pipe type joint is used for a snow-discharging saddle, it can be easily and efficiently attached even if a large number of snow-discharging nozzles are attached. Work accuracy can be ensured.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a branch pipe-type joint according to an embodiment of the present invention.
FIG. 2 is an overall explanatory diagram of FIG. 1;
FIG. 3 is a diagram illustrating a part of the embodiment of FIG. 1;
FIG. 4 is a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Water supply main pipe, 2 ... Socket pipe, 3 ... Branch pipe type joint, 4 ... Branch pipe, 8 ... Color body, 1A ... Connection hole

Claims (4)

After drilling the connection hole 1A for the small diameter branch pipe 4 made of polyvinyl chloride in the large diameter water supply main pipe 1 made of polyvinyl chloride,
An upper joint portion where the locking portion 13 provided on the PVC socket tube 2 for the branch pipe 4 is locked and erected by utilizing its elasticity, and the outer periphery of the lower end of the substantially short cylindrical presser 10 is provided with the water supply. An elastic thick-walled color body 8 integrally formed from a lower mounting foot that bulges to the inner surface side of the main pipe 1,
After pushing into the connecting hole 1A with your hand,
Pushing the base side of the socket tube 2 into the collar body 8 with a hand, the locking portion 13 is locked and connected , and
The outer periphery of the lower end of the color body 8 is bulged to the inner surface side of the water supply main pipe 1 to prevent the color body 8 from being removed.
A large number of the branch pipes 4 that connect the snow-dissipating nozzles 5 are erected efficiently on the horizontal water supply main pipe 1 without adhesive bonding or the like, and the periphery thereof is compacted. Assembly method for branch pipe joints used for snow melting system materials. In the connecting hole 1A for the small-diameter branch pipe 4 made of polyvinyl chloride, drilled in the large-diameter water supply main pipe 1 ,
An upper joint portion where the locking portion 13 provided on the PVC socket tube 2 for the branch pipe 4 is locked and erected by utilizing its elasticity, and the outer periphery of the lower end of the substantially short cylindrical presser 10 is provided with the water supply. An elastic thick-walled color body 8 integrally formed from a lower mounting foot that bulges to the inner surface side of the main pipe 1,
Push in with your hand and swell the lower mounting foot ,
The socket body 2 is pushed into the color body 8 to connect the snow-dissipating nozzle 5 and the locking portion 13 is locked.
The outer periphery of the lower end of the color body 8 is bulged to the inner surface side of the water supply main pipe 1 by the presser 10 to prevent the color body 8 from being removed.
A branch pipe for use in a snow melting system material characterized in that a large number of the branch pipes are erected efficiently on the horizontal water supply main pipe 1 without adhesive bonding, and the periphery thereof is concretely solidified. Fittings. In the connecting hole 1A for the small-diameter branch pipe 4 made of polyvinyl chloride, drilled in the large-diameter water supply main pipe 1 ,
An engaging portion 13 provided on the PVC socket tube 2 for the branch pipe 4 for connecting the snow- dissipating nozzle 5 is engaged with an upper joint portion that is locked and erected using elasticity, and a substantially short cylindrical presser 10. An elastic thick-walled color body 8 integrally molded from a lower mounting foot part whose outer periphery at the lower end bulges to the inner surface side of the water supply main pipe 1 by pushing,
Attach and push with your hand,
The outer periphery of the lower end of the color body 8 is swelled to the inner surface side of the water supply main pipe 1 by the substantially short cylindrical presser 10 formed integrally with the lower end of the socket pipe 2 so that the color body 8 can be removed. Stop,
A branch pipe type used for a snow melting system material characterized in that a large number of the branch pipes 4 are efficiently erected on the horizontal water supply main pipe 1 without adhesive bonding and the like, and the periphery thereof is consolidated and solidified. Pipe fittings. A branch pipe-type joint in which the ring member (29) surrounding the collar body 8 of claim 2 or 3 is provided.

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