JP2021120535A - Collection pipe joint - Google Patents

Abstract

To mainly eliminate a trouble and labor in maintenance, and to make it easy that a joint body is constituted of a resin when providing a swirl vane inside the joint body.SOLUTION: A collection pipe joint comprises an upper pipe 11, a pipe member 15, a lower pipe 13, and a swirl vane 7. The upper pipe 11, the pipe member 15, the lower pipe 13, and the swirl vane 7 are separate members from each other that are constituted by injection-molding a resin composition. A horizontal pipe connection port portion 5 of the upper pipe 11 is provided by one piece on an undersurface 7b of a down-grade shape toward a tip of the swirl vane 7 or at a position facing a side edge portion 7c of the swirl vane 7. Also, below the horizontal pipe connection port portion 5 of the upper pipe 11, separate swirl vanes 21, 22 are provided at positions except a position of a horizontal pipe connection port portion 14 of the pipe member 15. An upper part of the pipe member 15 is made to be a socket portion into which a lower part of the upper pipe 11 can be inserted to be connected. In the upper pipe 11 and the pipe member 15, a lower end of the upper pipe 11 is inserted into and connected to an upper part of the pipe member 15.SELECTED DRAWING: Figure 2

Description

The present invention relates to a collecting pipe joint.

In high-rise buildings such as apartment buildings and office buildings, piping routes that extend vertically and horizontally are installed in the building. Then, a collecting pipe joint is used to connect the vertical pipe and the horizontal pipe constituting such a piping path.

This collective pipe joint is provided at a joint body extending in the vertical direction, a vertical pipe connection port which is provided at the upper and lower ends of the joint body and can connect a vertical pipe, and a horizontal pipe provided at a side surface of the joint body. (See, for example, Patent Documents 1 and 2).

A swivel blade is installed at least at the position of the horizontal pipe connection port inside the joint body. The swivel blade receives the fluid flowing down the vertical pipe and de-energizes it, and also applies a swirling force to the fluid to allow the fluid to flow smoothly along the inner peripheral surface of the joint body, and further, the center of the joint body. This is for forming an air core (air passage) in the portion.

JP-A-2010-248735 Japanese Unexamined Patent Publication No. 2011-6893

It is necessary to maintain the inside of the collecting pipe joint as described above on a regular basis. Alternatively, it is necessary to perform maintenance when clogging occurs.

However, since the swivel blades described above are 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 is installed. There is a risk that the tip of the swivel blade will be erroneously guided upward by the upper surface of the swivel blade (which has an upward slope shape toward the base side). If the tip of the cleaning tool is guided upward in this way, the inside of the joint body cannot be sufficiently cleaned. Therefore, it is necessary to reinsert the cleaning tool from another horizontal pipe connection port, which is troublesome.

Moreover, the joint body is a mixture of both the horizontal pipe connection port that faces the upper surface of the swivel blade (which has an upward slope toward the base side) and the horizontal pipe connection port that does not face the upper surface of the swivel blade. If the cleaning equipment is provided, it is necessary to select the horizontal pipe connection port that does not face the upper surface of the swivel blade before inserting the cleaning equipment so that the tip of the cleaning equipment is not accidentally guided upward. Since it occurs, it is bothersome and difficult to understand.
Further, when the swivel blade is provided inside the joint body, there is a problem that it is difficult to make the joint body made of resin.

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

In order to solve the above problems, the present invention
A vertical pipe connection port to which an upper floor vertical pipe can be connected, an upper pipe having a horizontal pipe connection port to which a horizontal pipe can be connected, and an upper pipe.
A pipe member having a horizontal pipe connection port which is connected to the lower part of the upper pipe and can connect a horizontal pipe,
A lower pipe provided below the pipe member and having a vertical pipe connection port to which a lower floor vertical pipe can be connected, and a lower pipe.
A swivel blade provided at the position of the horizontal pipe connection port of the upper pipe, and
It is a collecting pipe joint equipped with
The upper pipe, the pipe member, the lower pipe, and the swivel blade are separate members formed by injection molding a resin composition.
One horizontal pipe connection port of the upper pipe is provided so as to face the lower surface having a downward slope shape toward the tip of the swivel blade or the side edge portion of the swivel blade.
Another swivel blade is also provided below the horizontal pipe connection port of the upper pipe at a position other than the position of the horizontal pipe connection port of the pipe member.
The upper part of the pipe member is a receiving portion into which the lower part of the upper pipe can be inserted and connected.
The upper pipe and the pipe member are characterized in that the lower end of the upper pipe is inserted into and connected to the upper part of the pipe member.

According to the present invention, the above-mentioned configuration can eliminate the troublesomeness and labor during maintenance. Further, when the swivel blade is provided inside the joint body, the joint body can be easily made of resin.

It is a vertical cross-sectional view of the collecting pipe joint which concerns on this embodiment. It is a vertical cross-sectional view of the modification of FIG. (A) is a top view of the collecting pipe joint when there is one horizontal pipe connection port, and (b) is a side view of (a) viewed from the right side. (A) is a top view of the collecting pipe joint when there are two horizontal pipe connection ports, (b) is a side view of (a) viewed from the right side, and (c) is a view of (a) from below. It is a side view. (A) is a top view of the upper pipe when there is one horizontal pipe connection port, (b) is a vertical sectional view of (a), (c) is a bottom view of (b), and (d) is (b). ) Is a side view seen from the right side, and (e) is a side view of (d) seen from the right side. (A) is a top view of the upper pipe when there are two horizontal pipe connection ports, (b) is a vertical sectional view of (a), (c) is a bottom view of (b), and (d) is (b). ) Is a side view seen from the left side, and (e) is a side view of (b) seen from the right side. As a comparative example, it is a vertical cross-sectional view of a collecting pipe joint provided with both a horizontal pipe connection port facing the upper surface of the swivel blade and a horizontal pipe connection port facing the lower surface of the swivel blade. (A) is a top view of a collecting pipe joint similar to FIG. 7 when there is one horizontal pipe connection port, and (b) is a side view of (a) viewed from the left side. (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 side, and (c) is (a). It is a side view seen from the lower side.

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

<Structure> The configuration will be described below.

In high-rise buildings such as apartment buildings and office buildings, piping routes that extend vertically and horizontally are installed in the building. Then, a collecting pipe joint is used to connect the vertical pipe (or vertical pipe) and the horizontal pipe (or horizontal branch pipe) constituting such a piping path.

As shown in FIG. 1, the collecting pipe joint 1 is provided at the joint body 2 extending in the vertical direction and the upper and lower ends of the joint body 2, and the vertical pipe connection ports 3 and 4 to which the vertical pipe can be connected are provided. And, it is assumed that it is provided on the side surface of the joint main body 2 and has the horizontal pipe connecting ports 5 and 6 (see FIG. 4) to which the horizontal pipe can be connected.

A swivel blade 7 as described later is installed at least at the positions of the horizontal pipe connecting ports 5 and 6 inside the joint body 2.

Hereinafter, a more specific structure of the collecting pipe joint 1 will be described.

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

The joint body 2 is mainly composed of three pipe members, an upper pipe 11, an intermediate pipe 12, and a lower pipe 13. However, the configuration of the joint body 2 is not limited to this, and for example, as shown in FIG. 2, between the upper pipe 11 and the intermediate pipe 12, a horizontal pipe connection port similar to that of the upper pipe 11 is connected. An expansion pipe member 15 having one or a plurality of portions 14 and the like may be interposed in a single stage or in multiple stages.

Of these, the above-mentioned upper pipe 11 has a function of connecting vertical pipes and horizontal pipes installed on the upper floor side of the floor slab which is the floor spacing wall of the building (vertical and horizontal pipe mounting member). The vertical pipe connection port 3 described above is provided at the upper end of the upper pipe 11. The vertical pipe connection port 3 is a receiving portion into which a vertical pipe on the upper floor side can be inserted and connected, and the vertical pipe connection port 3 is an expansion joint that can absorb the influence of thermal expansion and contraction of the vertical pipe. The member 17 is attached.

Further, on the side surface of the upper pipe 11, the above-mentioned horizontal pipe connecting ports 5 and 6 are projected in the lateral direction. The horizontal pipe connecting ports 5 and 6 are receiving portions into which the horizontal pipe can be inserted and connected, and the horizontal pipe connecting ports 5 and 6 are telescopic joint members so as to be able to absorb the influence of thermal expansion and contraction of the horizontal pipe. 18 is attached.

As can be seen from FIG. 3 or 4, the horizontal pipe connection ports 5 and 6 basically have a maximum of four horizontal pipe connection ports 5 and 6 having an angle of 90 degrees in the circumferential direction with respect to the side surface of the upper pipe 11. Can be provided up to. Then, at the position inside the upper pipe 11 between the horizontal pipe connecting ports 5 and 6 adjacent in the circumferential direction, if necessary, a vertical rib 19 is provided at a maximum angle of 90 degrees in the circumferential direction. It is possible to project up to four. The vertical rib 19 is for preventing the fluid from the vertical pipe or the horizontal pipe from flowing back to the other horizontal pipe. Therefore, the vertical rib 19 functions sufficiently if it is provided on the side portions of the horizontal pipe connecting ports 5 and 6. The specific installation structures of the horizontal pipe connecting ports 5 and 6 and the vertical ribs 19 in this embodiment as shown in FIGS. 3 and 4 will be described later.

Next, returning to FIG. 1, the above-mentioned intermediate pipe 12 is arranged to penetrate the floor slab of the building (slab penetrating member). The intermediate pipe 12 has a tubular shape having 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 pipe 13 is said to have a tapered shape in which almost the entire portion is reduced in diameter downward. The vertical pipe connecting port 4 described above is a receiving portion into which a vertical pipe on the lower floor side can be inserted and connected, and is integrally formed at the lower end of the lower pipe 13. The vertical pipe connection port 4 may be continuous with the tapered portion described above without a step, or may be continuous with the tapered portion described above with a step.

Further, the inside of the joint body 2 is provided with a deenergizing mechanism for deenergizing the fluid flowing inside (reducing the flow velocity). This energy reducing mechanism is said to be swirling vanes 7, 21, 22 and the like that receive the flow of the fluid and give a swirling force to the fluid. In this case, a total of three swivel blades 7, 21 and 22, are provided, one for each of the inside of the upper pipe 11, the intermediate pipe 12, and the lower pipe 13.

These swivel blades 7, 21 and 22, also have a function of generating a swirling flow in the fluid flowing inside to form an air core (air passage) at the axial center of the vertical pipe or the collecting pipe joint 1. Further, the upper surfaces 7a of the swivel blades 7, 21 and 22 also have a function of preventing the fluid from the vertical pipe and the horizontal pipe from flowing back to the other horizontal pipe, similarly to the vertical rib 19. However, the number and position of the swivel blades 7, 21 and 22 are not limited to this.

The swivel blades 7 at the positions of the horizontal pipe connecting ports 5 and 6 described above are provided inside the upper pipe 11. The swivel blade 7 is integrally provided with, for example, the ring-shaped member 23, and is intervened and installed between the upper pipe 11 and the expansion joint member 17 together with the ring-shaped member 23. Further, the swivel blade 7 is installed in place of the vertical rib 19 at any position where the vertical rib 19 can be provided. The upper surface 7a of the swivel vane 7 has an upward gradient toward the base side (outer peripheral side of the joint body 2), and the lower surface 7b thereof has an upward slope toward the tip side (center side of the joint body 2). It has a downward slope shape.

As described above, the collecting pipe joint 1 having such a configuration is installed in a building such as an apartment house or an office building, so that the collecting pipe joint 1 is installed in a pipe passage such as a drainage channel or a water supply channel (for example, a single pipe type drainage). It is used to configure the system). In this case, the collecting pipe joint 1 is formed by inserting the joint body 2 from above into a through hole formed in a floor slab that divides the upper and lower floors of the building and fixing the intermediate pipe 12 of the joint body 2 with mortar. Is installed. Therefore, the intermediate pipe 12 is made longer than the thickness of the floor slab.

Then, in order to use the floor slab as a fireproof partition wall, the intermediate pipe 12 is composed of a resin composition such as a refractory heat-expandable resin pipe. This refractory heat-expandable resin pipe is mainly composed of a refractory heat-expandable resin containing heat-expandable graphite in a resin base material such as a polyvinyl chloride-based resin. When a fire breaks out, the heat-expandable graphite expands thermally, thereby closing the collecting pipe joint 1, the through hole, and the like so that the floor slab retains the function as a fire-prevention partition wall.

Here, although it will be slightly longer, the details of the above-mentioned refractory thermal expansion resin pipe will be described.

In this embodiment, the fire-resistant heat-expandable resin pipe is made of a fire-resistant heat-expandable resin composition containing 1 to 10 parts by weight of heat-expandable graphite with respect to 100 parts by weight of a polyvinyl chloride-based resin. A single-layer structure of an expansion layer, or a fire-resistant heat-expandable resin pipe containing 1 to 15 parts by weight of heat-expandable graphite with respect to 100 parts by weight of a polyvinyl chloride-based resin. A three-layer structure consisting of a fire-resistant expansion layer made of a resin composition and a coating layer made of a heat-expandable graphite-free polyvinyl chloride-based resin composition provided so as to cover the inner and outer surfaces of the fire-resistant expansion layer. Is preferable.

Examples of the polyvinyl chloride-based resin include a polyvinyl chloride homopolymer; a copolymer of a vinyl chloride monomer and a monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer; a copolymer other than vinyl chloride (co-). ) A graft copolymer obtained by graft-copolymerizing vinyl chloride as a polymer can be mentioned, and these may be used alone or in combination of two or more. Further, the polyvinyl chloride resin may be chlorinated if necessary.

The monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer is not particularly limited, and is, for example, α-olefins such as ethylene, propylene and butylene; vinyl esters such as vinyl acetate and vinyl propionate; butyl. 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 , 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 for graft-copolymerizing vinyl chloride is not particularly limited as long as it is for graft-copolymerizing vinyl chloride, and is, for example, an ethylene-vinyl acetate copolymer or an ethylene-vinyl acetate-carbon monoxide copolymer. Combined, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate-carbon monoxide copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, acrylonitrile-butadiene copolymer, polyurethane, chlorinated polyethylene, Examples thereof include chlorinated polypropylene, and these may be used alone or in combination of two or more.

Any of the above polyvinyl chloride-based resins may be crosslinked or modified as long as the fire resistance performance of the resin composition is not impaired. In this case, a resin that has been crosslinked or modified in advance may be used, or may be crosslinked or modified at the same time when the additive or the like is added, or may be crosslinked or modified after the above components are added to the resin. good. The method for cross-linking the above resin is also not particularly limited, and ordinary cross-linking methods for polyvinyl chloride resins, for example, cross-linking using various cross-linking agents and peroxides, cross-linking by electron beam irradiation, and water cross-linking materials are used. Examples of the method used.

The refractory thermal expansion resin pipe is a single layer of only the refractory expansion layer as long as the refractory expansion layer expands when heated by a flame or the like and the inside of the pipe can be closed or nearly closed. In some cases, a multi-layer structure may be provided in which a resin layer made of a resin composition containing no expanded graphite is provided on the inner and outer surfaces of the refractory expansion layer as long as the fire resistance performance of the refractory expansion layer is not impaired.

In the case of the above-mentioned single-layer structure product, the refractory heat-expandable resin composition forming the refractory expansion layer is not particularly limited, but 1 to 10 parts by weight of the heat-expandable graphite is added to 100 parts by weight of the polyvinyl chloride-based resin. It is preferably contained in a proportion of parts, more preferably in a proportion of 1 to 8 parts by weight, and even more preferably in a proportion of 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 at the time of combustion, and the desired fire resistance may not be obtained. This is because there is a risk that the thermal expansion will be too great and the shape cannot be maintained, and the residue will fall off, resulting in a decrease in fire resistance.

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

Further, as described above, the refractory expansion layer has a multi-layer structure formed of a refractory thermal expansion resin composition containing 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. In the case of a product, it is preferable to have a three-layer structure in which the inner and outer surfaces of the refractory expansion layer are coated with a polyvinyl chloride resin composition containing no heat-expandable refractory material.

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

The heat-expandable graphite used for the collecting pipe joint 1 is a powder of natural scaly graphite, thermally decomposed graphite, kiss graphite or the like, and an inorganic acid such as concentrated nitric acid, nitric acid or selenic acid and concentrated nitric acid, perchloric acid or perchlorate. , Permanganate, dichromate, hydrogen peroxide and other strong oxidizing agents, after acid treatment to insert an inorganic acid between the layers of graphite, the layered structure of carbon obtained by adjusting the pH was maintained. It is preferable to use as-is crystalline compound, which is thermally expandable graphite adjusted to pH 1.5 to 4.0 and thermally expandable graphite having a 1.3-fold expansion temperature of 180 ° C. to 240 ° C. When the pH of the heat-expandable graphite is less than 1.5, the acidity is too strong and easily causes corrosion of the molding apparatus, and when the pH exceeds 4.0, the effect of promoting carbonization of the polyvinyl chloride resin is obtained. This is because there is a risk that sufficient fire resistance cannot be obtained due to fading.

Further, the flame-resistant thermoplastic resin composition forming the fire-resistant expansion layer is provided with a stabilizer, an inorganic filler, a flame retardant, a lubricant, a processing aid, and an impact modification, if necessary, as long as the object of the present invention is not impaired. Additives such as quality agents, heat-resistant improvers, antioxidants, light stabilizers, ultraviolet absorbers, pigments, plasticizers, and thermoplastic elastomers may be added.

Further details of the collecting pipe joint 1 will be omitted.

The collecting pipe joint 1 of this embodiment has the following configuration with respect to the basic or overall configuration as described above.

(1) As shown in FIG. 3 or 4, the horizontal pipe connecting ports 5 and 6 are provided so as to extend substantially perpendicular to (the pipe shaft) of the joint body 2.
Only one (see FIG. 3) or two (see FIG. 4) of the horizontal pipe connecting ports 5 and 6 are provided with respect to the circumferential direction of the joint body 2.
The lower surface 7b or the side edge portion of the swivel blade 7 in which all of the one or two horizontal pipe connection ports 5 and 6 have a downward slope shape toward the tip of the swivel blade 7. It is provided at a position facing 7c.

Here, the reason why it is set to be substantially vertical is that it is not exactly vertical because there is a draft from the mold, a drainage gradient, and the like.
Further, the horizontal pipe connecting ports 5 and 6 in FIG. 4 are provided so as to be adjacent to each other with an angle of 90 degrees in the circumferential direction. Further, in FIG. 4, two vertical ribs 19 are provided, one at each of the side portions of the horizontal pipe connecting ports 5 and 6. Further, the swivel blade 7 is provided so as to be located on a side portion of the horizontal pipe connecting port 5 opposite to the vertical rib 19. Note that FIG. 3 also has the same arrangement of the vertical ribs 19 and the swivel blades 7 as in FIG.

(2) As described above, the expansion joint member 18 (see FIG. 1) is attached to the horizontal pipe connecting ports 5 and 6.
Then, as shown in FIG. 5 or 6, when the position of the injection gate 32 of the molten resin 31 at the time of injection formation is set on the lower end side of the upper pipe 11, the tops of the horizontal pipe connection ports 5 and 6 are set. A notch 36 for defining the mounting position of the expansion joint member 18 in the circumferential direction is provided in the portion of the range 35 from the excluded side portion to the bottom portion.

Here, as shown in FIG. 1, the expansion joint member 18 has a short tubular joint body 18a, a seal member 18b installed on the entrance side of the joint body 18a, and a ring-shaped seal member 18b. It is said to have a cover member 18c and the like. Then, the telescopic joint member 18 is provided with a mark such as a protrusion (for alignment in the circumferential direction) for aligning with the notch 36 described above at the time of attachment.

The expansion joint member 18 has a diameter substantially the same as that of the horizontal pipe connecting ports 5 and 6, and a member having a diameter different from that of the horizontal pipe connecting ports 5 and 6. When the expansion joint member 18 has a different diameter from the horizontal pipe connecting ports 5 and 6, the pipe bottom side is connected at the same level. The expansion joint member 17 described above also has a structure substantially similar to that of the expansion joint member 18.

In FIG. 5D, a weld line 39 (resin flow) in which the molten resin 31 that has flowed inside the mold (injection molding mold) joins the portion of the upper pipe 11 on the upper end side farthest from the injection gate 32. Traces) are formed.

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

The collective pipe joint 1 connects a vertical pipe extending in the vertical direction through each floor of a high-rise building such as an apartment building or an office building and a horizontal pipe extending in the horizontal direction in each floor of the building to connect the building. It forms a piping path that extends vertically and horizontally inside. Therefore, the 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 the horizontal pipe connection ports 5 and 6 provided on the side surfaces of the joint body 2 are laterally connected. The pipes are connected.

The swivel blades 7 are installed at least at the positions of the horizontal pipe connecting ports 5 and 6 inside the joint body 2. The swirl vanes 7 receive the fluid flowing down the vertical pipe and reduce the energy, and also apply a swivel force to the fluid to allow the fluid to flow smoothly along the inner peripheral surface of the joint body 2, and further, the joint body. An air core (air passage) is formed in the center of 2.

<Effect> 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 perpendicular to the joint body 2 (not strictly vertical due to the presence of a draft from the mold and a drainage gradient). By doing so, the shape and structure of the joint body 2 are simplified, so that mold manufacturing and injection molding become easy, and the product cost of the joint body 2 can be reduced accordingly.
Further, in order to prevent the propagation of noise and vibration generated by the fluid (drainage flow) flowing inside the joint body 2, a sound insulation and vibration isolation sheet is wrapped around the joint body 2, but the horizontal pipe connection port is provided. By projecting 5 and 6 so as to extend substantially perpendicular to the joint body 2, the shape of the sound insulation and vibration isolation sheet and its winding can be facilitated.

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

Here, the swivel blades 7 are installed at least at the positions of the horizontal pipe connecting ports 5 and 6 inside the joint body 2. Therefore, for example, as shown in the comparative example of FIG. 7 (an example having the horizontal pipe connection port 9 having a different position), when the cleaning tool S or the like is inserted into the joint main body 2 from the horizontal pipe side for maintenance. The tip of the cleaning tool S that has passed through the horizontal pipe connecting port 9 may be guided upward by the upper surface 7a having an upward slope shape toward the base side of the swirl vane 7. In particular, this problem is likely to occur when the horizontal pipe connecting ports 5 and 6 are projected so as to extend substantially perpendicular to the joint body 2. When the tip of the cleaning tool S is guided upward in this way, the drainage channel of the building is generally cleaned from the upstream side to the downstream side, so that the inside of the joint body 2 cannot be sufficiently cleaned. It ends up. Therefore, the cleaning tool S must be reinserted from another horizontal pipe connection port 5.

At this time, as shown in FIG. 8, when the joint body 2 has only the horizontal pipe connecting port 9 facing the upper surface 7a having an upward slope shape toward the base side of the swivel blade 7, it is cleaned. Since the tip of the instrument S is surely guided upward, the inside of the joint body 2 cannot be cleaned.

Further, as shown in FIG. 9, the joint body 2 faces the horizontal pipe connecting port 9 facing the upper surface 7a having an upward slope shape toward the base side of the swivel blade 7 and the upper surface 7a of the swivel blade 7. When both of the horizontal pipe connection port 5 and the horizontal pipe connection port 5 are provided in a mixed manner, the horizontal pipe that does not face the upper surface 7a of the swivel vane 7 is prevented from being accidentally guided upward by the tip of the cleaning device S. It is necessary to insert the cleaning device S after selecting the connection port 5, but when the collective pipe joint 1 is installed in the building and the horizontal pipe and vertical pipe are connected, the horizontal pipe inside the joint body 2 is connected. Since the positional relationship between the connection port 9 and the swivel vane 7 is unknown, the above-mentioned problem is likely to occur.

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

As a result, the tip of the cleaning tool S is guided to the lower surface 7b (or the side edge portion 7c) having a downward slope shape toward the tip of the swirl vane 7 regardless of where the cleaning tool S is inserted from the horizontal pipe connection ports 5 and 6. Can be made to go down. Therefore, it is possible to always sufficiently clean the inside of the joint body 2 without selecting the horizontal pipe connecting ports 5 and 6 into which the cleaning tool S is inserted. Therefore, it is possible to eliminate the troublesomeness and wasteful labor during 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 swivel blade 7, but the installation position of the swivel blade 7 is determined. Since it is clear that the position of the inner wall surface of the joint body 2 does not have the horizontal pipe connection port, it is clear from which horizontal pipe connection port the cleaning device S should be inserted so that it does not face the upper surface 7a of the swivel vane 7. Therefore, on the contrary, the above problem is unlikely to occur.

(Effect 2) As shown in FIGS. 5 and 6, the upper pipe 11 is provided with an injection gate 32 at a position on the lower end side in the pipe axis direction, and the molten resin 31 is injected from the lower end side and melted toward the upper end side. It is injection-molded by flowing the resin 31. This is because the molten resin 31 is allowed to flow along the vertical ribs 19 extending in the pipe axis direction so that the vertical ribs 19 can be reliably formed.

Therefore, the weld line 39 (resin flow mark) where the molten resin 31 that has flowed inside the mold (injection molding mold) joins the portion on the upper end side of the horizontal pipe connection ports 5 and 6 farthest from the injection gate 32. Will occur.

Generally, the weld line 39 has a lower strength than the other parts, and when the notch 36 for positioning the expansion joint member 18 described above is provided at the top of the horizontal pipe connection ports 5 and 6, the notch 36 and the notch 36 There is a high possibility that the positions of the weld line 39 and the weld line 39 will match, and when the positions of the notch 36 and the weld line 39 match, the notch 36 is likely to be cracked.

Therefore, when the injection gate 32 at the time of injection formation is set on the lower end side of the upper pipe 11, the expansion joint is provided in the range 35 from the side to the bottom excluding the periphery of the top of the horizontal pipe connection ports 5 and 6. A notch 36 for defining the mounting position of the member 18 in the circumferential direction is provided. As a result, there is no possibility that the positions of the notch 36 and the weld line 39 match, so that it is possible to prevent the notch 36 from cracking due to the coincidence of the positions of the notch 36 and the weld line 39.

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 excluding the periphery of the bottom of the horizontal pipe connection ports 5 and 6. A notch 36 for defining the mounting position in the circumferential direction may be provided. That is, the notch 36 is closest to the injection gate 32 from the side of the lateral pipe connection ports 5 and 6, excluding the position (top or bottom) farthest from the position of the injection gate 32 of the upper pipe 11 and its periphery. It should be provided in the portion 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 changes in the design of the range 35 that does not deviate from the gist of the present invention. Further, for example, when a plurality of configurations are included in each embodiment, it goes without saying that possible combinations of these configurations are included even if there is no particular description. Further, when a plurality of examples and modifications are disclosed as those of the present invention in the embodiment, possible combinations of configurations straddling these are included even if there is no particular description. Of course. Further, it goes without saying that the configuration depicted in the drawings is included even if there is no particular description. Furthermore, when there is a term such as "etc.", it is used to mean that it includes the equivalent. In addition, when there are terms such as "almost", "about", and "degree", they are used to mean that they include those with a range of 35 and accuracy that are generally accepted.

1 Collective pipe joint 2 Joint body 3 Vertical pipe connection port 4 Vertical pipe connection port 5 Horizontal pipe connection port 6 Horizontal pipe connection port 7 Swing blade 7a Upper surface 7b Lower surface 7c Side edge 11 Upper pipe 15 Pipe member 13 Lower Tube 19 Vertical rib 21 Another swivel vane 22 Another swivel vane 32 Injection gate

Claims (5)

A vertical pipe connection port to which an upper floor vertical pipe can be connected, an upper pipe having a horizontal pipe connection port to which a horizontal pipe can be connected, and an upper pipe.
A pipe member having a horizontal pipe connection port which is connected to the lower part of the upper pipe and can connect a horizontal pipe,
A lower pipe provided below the pipe member and having a vertical pipe connection port to which a lower floor vertical pipe can be connected, and a lower pipe.
A swivel blade provided at the position of the horizontal pipe connection port of the upper pipe, and
It is a collecting pipe joint equipped with
The upper pipe, the pipe member, the lower pipe, and the swivel blade are separate members formed by injection molding a resin composition.
One horizontal pipe connection port of the upper pipe is provided so as to face the lower surface having a downward slope shape toward the tip of the swivel blade or the side edge portion of the swivel blade.
Another swivel blade is also provided below the horizontal pipe connection port of the upper pipe at a position other than the position of the horizontal pipe connection port of the pipe member.
The upper part of the pipe member is a receiving portion into which the lower part of the upper pipe can be inserted and connected.
The upper pipe and the pipe member are a collecting pipe joint characterized in that the lower end of the upper pipe is inserted into and connected to the upper part of the pipe member. The collecting pipe joint according to claim 1, wherein the swivel blade provided on the upper pipe is located on the right side when the horizontal pipe connection port is viewed from the outer peripheral side of the upper pipe. Claim 1 or claim, wherein a vertical 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 collective pipe joint according to item 2. The vertical rib is provided so as to extend in the pipe axial direction of the upper pipe and the pipe member.
The collecting pipe joint according to claim 3, wherein the gate for forming the upper pipe is an upper end or a lower end of the upper pipe in the pipe axial direction. The collecting pipe joint according to any one of claims 1 to 4, wherein two of the other swivel blades are provided at a position lower than the pipe member.

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