JP7265582B2 - Collecting pipe joint - Google Patents

Description

TECHNICAL FIELD The present invention relates to a collection pipe joint.

In a high-rise building such as an apartment complex or an office building, piping routes are installed that extend vertically and horizontally within the building. Collective pipe joints are used to connect vertical pipes and horizontal pipes that constitute such a piping route.

The collecting pipe joint includes a joint body extending in the vertical direction, vertical pipe connection openings provided at the upper and lower ends of the joint body to which vertical pipes can be connected, and lateral pipes provided on the side surfaces of the joint body. (see, for example, Patent Documents 1 and 2).

A swirl vane is installed at least at the position of the horizontal pipe connection port inside the joint body. The swirl vanes receive and reduce the force of the fluid flowing down the vertical pipe, give swirling force to the fluid, smoothly flow the fluid along the inner peripheral surface of the joint body, and furthermore, the center of the joint body. It is for forming an air core (air passage) in the part.

JP 2010-248735 A JP-A-2011-6893

The collecting pipe joint as described above requires periodic maintenance of the inside. Alternatively, maintenance must be performed when clogging or the like occurs.

However, since the above-described swirl vane is installed at least at the position of the horizontal pipe connection port inside the joint body, if a cleaning tool or the like is inserted into the joint body from the horizontal pipe side for maintenance, the cleaning tool tip of the swirl vane may be erroneously guided upward by the upper surface of the swirl vane (having an upward slope toward the base). If the tip of the cleaning instrument is guided upward in this manner, the interior of the joint body cannot be sufficiently cleaned. Therefore, it is necessary to reinsert the cleaning instrument from another horizontal pipe connection port, which is troublesome.

In addition, the joint body has both a horizontal pipe connection opening facing the upper surface of the swirl vane (having an upward slope toward the base) and a horizontal pipe connection opening not facing the upper surface of the swirl vane. , it is necessary to select a horizontal pipe connection port that does not face the upper surface of the swirl vane before inserting the cleaning instrument so that the tip of the cleaning instrument is not guided upward by mistake. Because it occurs, it is annoying and difficult to understand.

Therefore, the main object of the present invention is to solve the above-described problems.

In order to solve the above problems, the present invention
an upper pipe having a vertical pipe connection port to which the upper floor vertical pipe can be connected, and a horizontal pipe connection port to which the horizontal pipe can be connected;
a pipe member connected to the lower part of the upper pipe and having a horizontal pipe connection opening to which a horizontal pipe can be connected;
a lower pipe provided in the lower part of the pipe member and having a vertical pipe connection opening to which the lower floor vertical pipe can be connected;
a swirl vane provided at the position of the horizontal pipe connection port in the upper pipe ;
A collecting pipe joint comprising
The upper pipe, the pipe member, the lower pipe and the swirl vane are separate members each formed by injection molding a resin composition,
The horizontal pipe connection port of the upper pipe protrudes so as to extend substantially perpendicularly to the pipe axis of the upper pipe,
The horizontal pipe connection port of the upper pipe is provided with one or two such that it faces the lower surface of the swirl vane that slopes downward toward the tip of the swirl vane, or faces the side edge of the swirl vane. be
The horizontal pipe connection port of the upper pipe is not provided at a position facing the upper surface of the swirl vane,
Another swirl vane is also provided below the horizontal pipe connection port of the upper pipe at a position excluding the position of the horizontal pipe connection port of the pipe member,
The upper part of the pipe member is a socket into which the lower part of the upper pipe can be inserted and connected,
The upper tube and the tubular member are connected by inserting a lower end of the upper tube into an upper portion of the tubular member.

According to the present invention, with the above configuration, one or two horizontal pipe connection ports projecting so as to extend substantially perpendicularly to the pipe axis of the upper pipe are provided at positions facing the upper surface of the swirl vane. Since the tip of the cleaning instrument is not guided upward by the upper surface of the swirl vane, but is directed downward by the lower surface of the swirl vane, troublesomeness and labor during maintenance can be eliminated.

1 is a longitudinal sectional view of a collecting pipe joint according to this embodiment; FIG. FIG. 2 is a longitudinal sectional view of a modification of FIG. 1; (a) is a top view of a collecting pipe joint having one horizontal pipe connection port, and (b) is a side view of (a) viewed from the right side. (a) is a top view of a collecting pipe joint with two horizontal pipe connection ports, (b) is a side view of (a) viewed from the right side, and (c) is a view of (a) viewed from below. It is a side view. (a) is a top view of the upper pipe with one horizontal pipe connection port, (b) is a longitudinal sectional view of (a), (c) is a bottom view of (b), (d) is (b) ) is viewed from the right side, and (e) is a side view of (d) viewed from the right side. (a) is a top view of the upper pipe when there are two horizontal pipe connection ports, (b) is a longitudinal sectional view of (a), (c) is a bottom view of (b), (d) is (b) ) is viewed from the left side, and (e) is a side view of (b) viewed from the right side. FIG. 8 is a vertical cross-sectional view of a manifold joint provided with both a horizontal pipe connection opening facing the upper surface of the swirl vane and a horizontal pipe connection opening facing the lower surface of the swirl vane, as a comparative example. (a) is a top view of the same pipe joint as in FIG. 7 when there is one horizontal pipe connection port, and (b) is a side view of (a) viewed from the left. (a) is a top view of a collecting pipe joint similar to FIG. 7 when there are two horizontal pipe connection ports, (b) is a side view of (a) viewed from the left, and (c) is a view of (a). It is the side view seen from the lower side.

Hereinafter, this embodiment will be described in detail with reference to the drawings.
1 to 9 are for explaining this embodiment.

<Construction> The construction will be described below.

In a high-rise building such as an apartment complex or an office building, piping routes are installed that extend vertically and horizontally within the building. Collective pipe joints are used to connect vertical pipes (or vertical pipes) and horizontal pipes (or horizontal branch pipes) that constitute such a piping route.

As shown in FIG. 1, the pipe joint 1 includes a joint body 2 extending in the vertical direction and vertical pipe connection openings 3 and 4 provided at the upper and lower ends of the joint body 2 to which vertical pipes can be connected. and horizontal pipe connection ports 5 and 6 (see FIG. 4) provided on the side surface of the joint body 2 to which a horizontal pipe can be connected.

A swirl vane 7, which will be described later, is installed at least at the positions of the horizontal pipe connection openings 5 and 6 inside the joint body 2. As shown in FIG.

A more specific structure of the manifold 1 will be described below.

Here, the collecting pipe joint 1 described above is mainly composed of a resin composition such as a vinyl chloride resin having flame retardancy. The vertical pipe mentioned above is a pipe line or pipe member extending in the vertical direction. Further, the above-described horizontal pipe is a pipe line or pipe member extending in a substantially horizontal direction. The horizontal pipes may be provided with a drainage slope or the like as necessary.

The joint main body 2 is mainly composed of three pipe members, an upper pipe 11 , an intermediate pipe 12 and a lower pipe 13 . However, the structure of the joint body 2 is not limited to this. For example, as shown in FIG. An extension pipe member 15 having a single or a plurality of portions 14 may be interposed in a single stage or in multiple stages.

Of these, the above-described upper pipe 11 has a function of connecting vertical pipes and horizontal pipes installed on the upper story side of the floor slab that serves as the partition wall of the building (vertical and horizontal pipe mounting members). The upper end of the upper pipe 11 is provided with the vertical pipe connection port 3 described above. This vertical pipe connection port 3 is a socket into which the vertical pipe on the upper floor can be inserted and connected. Member 17 is attached.

Further, the above-described horizontal pipe connection ports 5 and 6 are provided on the side surface of the upper pipe 11 so as to protrude in the horizontal direction. The horizontal pipe connection ports 5 and 6 are sockets into which horizontal pipes can be inserted and connected. 18 is attached.

As can be seen from FIG. 3 or FIG. 4, the horizontal pipe connection ports 5 and 6 are basically arranged at a maximum angle of 90 degrees with respect to the side surface of the upper pipe 11 in the circumferential direction. can be set up to In the position between the lateral pipe connection openings 5 and 6 adjacent in the circumferential direction inside the upper pipe 11, if necessary, a vertical rib 19 is provided at a maximum angle of 90 degrees in the circumferential direction. Up to four pieces can be protruded. The vertical ribs 19 are for preventing the fluid from the vertical and horizontal pipes from flowing back to other horizontal pipes. Therefore, if the vertical ribs 19 are provided on the side portions of the horizontal pipe connection ports 5 and 6, they will function satisfactorily. Incidentally, as shown in FIGS. 3 and 4, specific installation structures of the horizontal pipe connection ports 5 and 6 and the vertical ribs 19 in this embodiment will be described later.

Next, returning to FIG. 1, the above-described intermediate pipe 12 is arranged to pass through the floor slab of the building (slab penetrating member). The intermediate tube 12 has a cylindrical shape with a substantially constant diameter.

The lower pipe 13 described above has a function of connecting a vertical pipe installed on the lower floor side of the floor slab of the building (vertical pipe mounting member). The lower tube 13 has a tapered shape whose diameter is reduced downward almost entirely. The above vertical pipe connection port 4 is a socket into which a vertical pipe on the lower floor side can be inserted and connected, and is formed integrally with the lower end of the lower pipe 13 . The vertical pipe connection port 4 may be connected to the tapered portion without a step, or may be connected to the tapered portion with a step.

Further, the joint main body 2 is provided with an energy-reducing mechanism for reducing the energy (flow velocity reduction) of the fluid flowing therein. This force reducing mechanism is made up of swirl vanes 7, 21, 22, etc., which receive the flow of the fluid and impart a swirling force to the fluid. In this case, the swirl vanes 7, 21, and 22 are provided one for each of the upper tube 11, the intermediate tube 12, and the lower tube 13, so that a total of three swirl vanes are provided.

These swirl vanes 7 , 21 , 22 also have the function of forming an air core (air passage) in the axial center of the vertical pipe or the collecting pipe joint 1 by generating a swirling flow in the fluid flowing inside. Furthermore, the upper surfaces 7a of the swirl vanes 7, 21, and 22, like the vertical ribs 19, also have the function of preventing the fluid from the vertical and horizontal pipes from flowing backward to other horizontal pipes. However, the number and positions of installation of the swirl vanes 7, 21 and 22 are not limited to this.

The swirl vanes 7 at the positions of the horizontal pipe connection ports 5 and 6 are provided inside the upper pipe 11 . The swirl vane 7 is, for example, integrally provided with the ring-shaped member 23 and interposed between the upper tube 11 and the expansion joint member 17 together with the ring-shaped member 23 . Furthermore, this swirl vane 7 is installed in place of the vertical rib 19 at any position where the above vertical rib 19 can be installed. The swirl vane 7 has an upper surface 7a that slopes upward toward the base (the outer periphery of the joint body 2), and a lower surface 7b that slopes toward the tip (the center of the joint body 2). It has a downward slope shape.

As described above, the collective pipe joint 1 having such a configuration is installed in a building such as an apartment complex or an office building, and thus can be installed in a pipeline such as a drainage channel or water supply channel system). In this case, the joint body 2 is inserted from above into a through hole formed in the floor slab that partitions the upper and lower floors of the building, and the intermediate pipe 12 of the joint body 2 is fixed with mortar. is installed. Therefore, the intermediate tube 12 is made longer than the thickness of the floor slab.

In order to use the floor slab as a fireproof partition wall, the intermediate pipe 12 is made of a resin composition such as a fireproof thermally expandable resin pipe. This refractory thermally expandable resin pipe is mainly composed of, for example, a refractory thermally expandable resin in which thermally expandable graphite is added to a resin base material such as polyvinyl chloride resin. When a fire occurs, the thermally expandable graphite thermally expands to block the pipe joint 1 and the through holes, thereby allowing the floor slab to retain its function as a fireproof partition wall.

Here, the details of the fire-resistant thermally expandable resin pipe will be described, though the length will be a little longer.

In this embodiment, the fire resistant thermally expandable resin pipe is made of a fire resistant thermally expandable resin composition containing 1 to 10 parts by weight of thermally expandable graphite with respect to 100 parts by weight of polyvinyl chloride resin. A single layer structure of the expansion layer, or a fire resistant thermally expandable resin pipe containing 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of polyvinyl chloride resin. A three-layer structure consisting of a refractory expansion layer made of a resin composition and a covering layer made of a polyvinyl chloride resin composition containing no thermally expandable graphite so as to cover the inner and outer surfaces of the refractory expansion layer. is preferred.

Examples of the polyvinyl chloride resin include polyvinyl chloride homopolymers; copolymers of vinyl chloride monomers and monomers having unsaturated bonds copolymerizable with the vinyl chloride monomers; ) Graft copolymers obtained by graft-copolymerizing vinyl chloride to polymers, etc., may be mentioned, and these may be used alone or in combination of two or more. Moreover, the polyvinyl chloride resin may be chlorinated as necessary.

The monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer is not particularly limited, and examples include α-olefins such as ethylene, propylene and butylene; vinyl esters such as vinyl acetate and vinyl propionate; vinyl ethers such as vinyl ether and cetyl vinyl ether; (meth)acrylic acid esters such as methyl (meth)acrylate, ethyl (meth)acrylate and butyl acrylate; aromatic vinyls such as styrene and α-methylstyrene; N-phenylmaleimide , and N-substituted maleimides such as N-cyclohexylmaleimide and the like, and these may be used alone or in combination of two or more.

The polymer graft-copolymerized with vinyl chloride is not particularly limited as long as it is graft-copolymerized with vinyl chloride. Examples include ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-carbon monoxide copolymer. coalescing, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate-carbon monoxide copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, acrylonitrile-butadiene copolymer, polyurethane, chlorinated polyethylene, Chlorinated polypropylene and the like may be mentioned, and these may be used alone or in combination of two or more.

Any of the above polyvinyl chloride resins may be crosslinked or modified within a range that does not impair the fire resistance performance of the resin composition. In this case, a resin that has been crosslinked or modified in advance may be used, or the resin may be crosslinked or modified at the same time as the additive is added, or the resin may be crosslinked or modified after the above components are added. good. The method for crosslinking the resin is not particularly limited, and the usual crosslinking methods for polyvinyl chloride resins, such as crosslinking using various crosslinking agents, peroxides, electron beam irradiation, and water-crosslinkable materials are used. and the like.

In addition, if the fire-resistant thermally expandable resin pipe expands when heated by a flame or the like, and the inside of the pipe can be blocked or close to being blocked, a single layer of only the fire-resistant expanded layer can be used. may have a multilayer structure in which resin layers made of a resin composition that does not contain expanded graphite are provided on the inner and outer surfaces of the refractory expansion layer within a range that does not impair the fire resistance performance of the refractory expansion layer.

In the case of the single-layer structure product, the fire-resistant and heat-expandable resin composition forming the fire-resistant and expandable layer is not particularly limited. parts by weight, more preferably 1 to 8 parts by weight, and even more preferably 2 to 7 parts by weight. This is because if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion may not be obtained during combustion, and the desired fire resistance may not be obtained. This is because there is a possibility that the thermal expansion will be excessive, the shape will not be maintained, the residue will fall off, and the fire resistance will be lowered.

On the other hand, in the case of a multi-layer structure product, the fire-resistant and heat-expandable resin composition forming the fire-resistant and expandable layer is not particularly limited, but 1 to 15 parts by weight of the heat-expandable graphite is added to 100 parts by weight of the polyvinyl chloride resin. It is preferably contained in a proportion of 1 to 12 parts by weight, more preferably in a proportion of 2 to 10 parts by weight. This is because if the thermally expandable graphite is less than 1 part by weight, sufficient thermal expandability cannot be obtained during combustion, and desired fire resistance cannot be obtained, and if it exceeds 15 parts by weight, This is because there is a risk that the heat will cause excessive thermal expansion and that the shape will not be maintained and the residue will fall off, resulting in a decrease in fire resistance.

In addition, as described above, a multilayer structure in which the refractory expansion layer is formed of a refractory and thermally expandable resin composition containing 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of polyvinyl chloride resin. In the case of products, it is preferable to have a three-layer structure in which the inner and outer surfaces of the fire-resistant expandable layer are coated with a polyvinyl chloride resin composition that does not contain a heat-expandable fire-resistant material.

In the case of a multi-layer structure product having a three-layer structure as described above, the thickness of each coating layer covering the inner and outer surfaces of the refractory tube is preferably 0.2 to 2.0 mm. This is because if the thickness of the coating layer that covers the inner and outer surfaces of the fire-resistant expansion layer is less than 0.2 mm, the mechanical strength of the pipe may be poor, and if it exceeds 2.0 mm, the fire resistance may be reduced. Because there is

The thermally expandable graphite used for the collecting pipe joint 1 is composed of powders such as natural flake graphite, pyrolytic graphite, and Kish graphite, and inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, concentrated nitric acid, perchloric acid, and perchlorate. , permanganate, bichromate, hydrogen peroxide, and other strong oxidizing agents, after an acid treatment to insert an inorganic acid between the graphite layers, the layered structure of carbon obtained by adjusting the pH was maintained. It is preferable to use thermally expandable graphite which is a crystalline compound as it is, adjusted to pH 1.5 to 4.0, and thermally expandable graphite having a 1.3 times expansion temperature of 180°C to 240°C. When the pH of the thermally expandable graphite is less than 1.5, the acidity is too strong, and corrosion of molding equipment is likely to occur. This is because there is a risk that the heat will fade and sufficient fire resistance will not be obtained.

In addition, the fire-resistant thermally expandable resin composition forming the fire-resistant expandable layer may contain stabilizers, inorganic fillers, flame retardants, lubricants, processing aids, and impact modifiers, if necessary, to the extent that the object of the present invention is not hindered. Additives such as modifiers, heat resistance improvers, antioxidants, light stabilizers, ultraviolet absorbers, pigments, plasticizers and thermoplastic elastomers may be added.

Further details of the manifold 1 will be omitted.

In addition to the basic or overall configuration as described above, the manifold 1 of this embodiment has the following configuration.

(1) As shown in FIG. 3 or 4, the horizontal pipe connection ports 5 and 6 project so as to extend substantially perpendicularly to (the pipe axis of) the joint body 2 .
Only one (see FIG. 3) or two (see FIG. 4) of the horizontal pipe connection ports 5 and 6 are provided in the circumferential direction of the joint body 2 .
The lower surface 7b in which all of the one or two horizontal pipe connection ports 5 and 6 are sloped downward toward the tip of the swirl vane 7, or the side edges of the swirl vane 7. It is provided at a position facing 7c.

Here, the reason why it is assumed to be substantially vertical is that there is a draft angle from the mold, a drainage slope, and the like, so it is not strictly vertical.
Moreover, the horizontal pipe connection ports 5 and 6 in FIG. 4 are provided so as to be adjacent to each other at an angle of 90 degrees in the circumferential direction. In addition, in FIG. 4, two vertical ribs 19 are provided in total, one on each side of the horizontal pipe connection ports 5 and 6 . The swirl vane 7 is provided so as to be positioned on the side of the horizontal pipe connection port 5 opposite to the vertical rib 19 . 3 also has the same arrangement of the vertical ribs 19 and swirl vanes 7 as in FIG.

(2) As described above, the expansion joint member 18 (see FIG. 1) is attached to the horizontal pipe connection openings 5 and 6 .
5 or 6, when the position of the injection gate 32 for the molten resin 31 at the time of injection molding is set at the lower end side of the upper pipe 11, the tops of the horizontal pipe connection ports 5 and 6 are A cutout portion 36 is provided in a portion of the range 35 from the side portion to the bottom portion, which defines the mounting position of the expansion joint member 18 in the circumferential direction.

Here, the expansion joint member 18, as shown in FIG. and a cover member 18c. The expansion joint member 18 is provided with a mark such as a projection (for circumferential alignment) for alignment with the notch 36 at the time of installation.

The expansion joint members 18 include those with substantially the same diameter as the horizontal pipe connection ports 5 and 6 and those with different diameters from the horizontal pipe connection ports 5 and 6. When the expansion joint member 18 has a diameter different from that of the horizontal pipe connection ports 5 and 6, the pipe bottom side is aligned with the same level for connection. The expansion joint member 17 described above also has substantially the same structure as the expansion joint member 18 .

In FIG. 5(d), the weld line 39 (resin flow line) where the molten resin 31 flowing inside the mold (injection mold) joins the upper end portion of the upper pipe 11 that is farthest from the injection gate 32. marks) are formed.

<Action> The action of this embodiment will be described below.

A collective pipe joint 1 connects a vertical pipe extending vertically through each floor of a high-rise building such as an apartment complex or an office building and a horizontal pipe extending horizontally within each floor of the building. It forms a piping route extending vertically and horizontally inside. For this reason, vertical pipes are connected to the vertical pipe connection ports 3 and 4 provided at the upper and lower ends of the joint body 2, and horizontal pipe connection ports 5 and 6 provided at the side surfaces of the joint body 2 are connected with horizontal pipes. A tube is to be connected.

Swirl vanes 7 are installed at least at the positions of the horizontal pipe connection openings 5 and 6 inside the joint body 2 . The swirl vanes 7 receive and reduce the force of the fluid flowing down the vertical pipe, and give a swirling force to the fluid to smoothly flow the fluid along the inner peripheral surface of the joint body 2, furthermore, An air core (air passage) is formed in the central part of 2.

<Effects> According to this embodiment, the following effects can be obtained.

(Effect 1) The horizontal pipe connection ports 5 and 6 are projected so as to extend substantially perpendicularly to the joint main body 2 (because there is a draft angle from the mold, a drainage slope, etc., it is not strictly perpendicular). This simplifies the shape and structure of the joint body 2 , facilitating mold manufacturing and injection molding, thereby reducing the product cost of the joint body 2 .
In addition, in order to prevent the propagation of noise and vibration generated by the fluid (drainage) flowing inside the joint body 2, a sound insulation and vibration isolation sheet is wrapped around the joint body 2. By protruding 5 and 6 so as to extend substantially perpendicularly to the joint body 2, the shape of the sound and vibration insulating sheet and its winding can be facilitated.

The number of connectable horizontal pipes can be selected according to the number of horizontal pipe connection ports 5 and 6 installed in the circumferential direction of the joint body 2 . For example, if there is one horizontal pipe connection port 5, one horizontal pipe can be connected. Also, if there are two horizontal pipe connection ports 5 and 6, two horizontal pipes can be connected.

Here, swirl vanes 7 are installed at least at the positions of the horizontal pipe connection ports 5 and 6 inside the joint body 2 . Therefore, for example, as shown in the comparative example of FIG. 7 (an example having a lateral pipe connection port 9 at a different position), when a cleaning instrument S or the like is inserted into the joint main body 2 from the lateral pipe side for maintenance, There is a risk that the tip of the cleaning instrument S that has passed through the horizontal pipe connection port 9 will be guided upward by the upper surface 7a of the swirl vane 7, which has an upward slope toward the base side. This problem is particularly likely to occur when the horizontal pipe connection ports 5 and 6 project so as to extend substantially perpendicularly to the joint body 2 . When the tip of the cleaning tool S is guided upward in this manner, the interior of the joint body 2 cannot be sufficiently cleaned because the drainage channel of the building is generally cleaned from the upstream side to the downstream side. put away. Therefore, the cleaning instrument S must be reinserted from another horizontal pipe connection port 5 .

At this time, as shown in FIG. 8, when the joint main body 2 is provided with only the horizontal pipe connection port 9 facing the upper surface 7a having an upward slope toward the base side of the swirl vane 7, cleaning is performed. Since the tip of the instrument S is surely guided upward, the inside of the joint body 2 cannot be washed.

Further, as shown in FIG. 9, the joint body 2 faces the horizontal pipe connection port 9 facing the upper surface 7a of the swirl vane 7, which slopes upward toward the base side of the swirl vane 7, and the upper surface 7a of the swirl vane 7. When both the horizontal pipe connection port 5 and the horizontal pipe connection port 5 not facing the upper surface 7 a of the swirl vane 7 are provided in a mixed manner, the horizontal pipe that does not face the upper surface 7 a of the swirl vane 7 is provided so that the tip of the cleaning instrument S is not erroneously guided upward. It is necessary to select the connection port 5 before inserting the cleaning tool S, but when the pipe joint 1 is installed in a building and the horizontal pipe and the vertical pipe are connected, the horizontal pipe inside the joint body 2 Since the positional relationship between the connection port 9 and the swirl vanes 7 is unknown, the above-described problems are likely to occur.

Therefore, the lower surface 7b in which all of the one or two horizontal pipe connection ports 5 and 6 are inclined downward toward the tip of the swirl vane 7, or the side edges of the swirl vane 7 It is provided at a position facing 7c.

As a result, the tip of the cleaning instrument S is guided toward the tip of the swirl vane 7 by the downward slope-shaped lower surface 7b (or side edge 7c) regardless of which horizontal pipe connection port 5 or 6 the cleaning instrument S is inserted into. can be made to go downwards. Therefore, the inside of the joint main body 2 can be sufficiently cleaned at all times without selecting the horizontal pipe connection openings 5 and 6 into which the cleaning implement S is inserted. Therefore, it is possible to eliminate troublesomeness and wasted labor in maintenance.
In the case where three horizontal pipe connection ports are provided, it is impossible to provide the horizontal pipe connection ports so as not to face the upper surface 7a of the swirl vane 7, but the installation position of the swirl vane 7 is Since it is clear that it is the position of the inner wall surface where there is no horizontal pipe connection port of the joint body 2, it is clearly known from which horizontal pipe connection port the cleaning tool S should be inserted so that it does not face the upper surface 7a of the swirl vane 7. Therefore, on the contrary, the above problem is less likely to occur.

(Effect 2) As shown in FIGS. 5 and 6, the upper tube 11 is provided with an injection gate 32 at a position on the lower end side in the tube axial direction, and the molten resin 31 is injected from the lower end side and melted toward the upper end side. Injection molding is performed by flowing the resin 31 . This is to ensure that the vertical ribs 19 can be formed by flowing the molten resin 31 along the vertical ribs 19 extending in the pipe axis direction.

Therefore, the weld line 39 (resin flow trace) where the molten resin 31 that has flowed inside the mold (injection mold) merges with the upper end portion of the horizontal pipe connection port portions 5 and 6 farthest from the injection gate 32. will occur.

In general, the weld line 39 has a lower strength than other portions. The position of the weld line 39 is more likely to match, and if the notch 36 and the weld line 39 match, the notch 36 is likely to crack.

Therefore, when the injection gate 32 at the time of injection molding is set on the lower end side of the upper pipe 11, expansion joints are formed in the area 35 from the side to the bottom except for the top portion periphery of the horizontal pipe connection ports 5 and 6. A notch 36 is provided to define the mounting position of the member 18 in the circumferential direction. As a result, the notch 36 and the weld line 39 are not likely to coincide with each other, so that cracking of the notch 36 due to the coincidence of the notch 36 and the weld line 39 can be prevented.

In addition, when the injection gate 32 is set on the upper end side of the upper pipe 11, the expansion joint member 18 is provided in the range 35 from the side to the top except for the periphery of the bottom of the horizontal pipe connection port 5, 6. A notch 36 may be provided to define the mounting position in the circumferential direction. That is, the notch 36 is located closest to the injection gate 32 from the sides of the horizontal pipe connection ports 5 and 6, excluding the position (top or bottom) of the upper pipe 11 farthest from the position of the injection gate 32 and its periphery. It should be provided within the range 35 up to the position (bottom or top).

Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are merely examples of the present invention. Therefore, the present invention is not limited only to the configuration of the embodiment, and it goes without saying that the present invention includes any modification of the design within the range 35 that does not deviate from the gist of the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if there is no particular description. In addition, when a plurality of examples and modifications are disclosed as the present invention in the embodiments, even if there is no particular description, possible combinations of configurations straddling these are included. It goes without saying that In addition, it goes without saying that the configurations depicted in the drawings are included even if they are not specifically described. Further, where the term "equal" is used, it is meant to include equivalents. In addition, when there are terms such as "approximately", "approximately", and "degrees", they are used in the sense of including the range 35 and accuracy that are commonly accepted.

1 Collecting pipe joint 2 Joint main body 3 Vertical pipe connection port 4 Vertical pipe connection port 5 Horizontal pipe connection port 6 Horizontal pipe connection port 7 Swirl vane 7a Upper surface 7b Lower surface 7c Side edge 11 Upper pipe 15 Pipe member 13 Lower part Tube 19 Longitudinal rib 21 Further swirl vane 22 Further swirl vane 32 Injection gate

Claims (5)

an upper pipe having a vertical pipe connection port to which the upper floor vertical pipe can be connected, and a horizontal pipe connection port to which the horizontal pipe can be connected;
a pipe member connected to the lower part of the upper pipe and having a horizontal pipe connection opening to which a horizontal pipe can be connected;
a lower pipe provided in the lower part of the pipe member and having a vertical pipe connection opening to which the lower floor vertical pipe can be connected;
a swirl vane provided at the position of the horizontal pipe connection port in the upper pipe ;
A collecting pipe joint comprising
The upper pipe, the pipe member, the lower pipe and the swirl vane are separate members each formed by injection molding a resin composition,
The horizontal pipe connection port of the upper pipe protrudes so as to extend substantially perpendicularly to the pipe axis of the upper pipe,
The horizontal pipe connection port of the upper pipe is provided with one or two such that it faces the lower surface of the swirl vane that slopes downward toward the tip of the swirl vane, or faces the side edge of the swirl vane. be
The horizontal pipe connection port of the upper pipe is not provided at a position facing the upper surface of the swirl vane,
Another swirl vane is also provided below the horizontal pipe connection port of the upper pipe at a position excluding the position of the horizontal pipe connection port of the pipe member,
The upper part of the pipe member is a socket into which the lower part of the upper pipe can be inserted and connected,
The upper pipe and the pipe member are connected to each other by inserting a lower end of the upper pipe into an upper portion of the pipe member. The pipe joint according to claim 1, wherein the swirl vane provided on the upper pipe is positioned on the right side when the horizontal pipe connection port is viewed from the outer peripheral side of the upper pipe. A longitudinal rib is provided inside the upper pipe or the pipe member at a position on the left side when the horizontal pipe connection port is viewed from the outer peripheral side of the upper pipe or the pipe member. Item 2. The collecting pipe joint according to item 2. the longitudinal rib is provided extending in the axial direction of the upper tube and the tube member,
4. The pipe joint according to claim 3, wherein a gate for forming the upper pipe is an upper end or a lower end of the upper pipe in the pipe axial direction. The manifold joint according to any one of claims 1 to 4, wherein the two additional swirl vanes are provided at a position below the pipe member.

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