JP3661969B2 - Piping connection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is related to a pipe connecting device for connecting a tubular member to an opening formed in a wall portion of a connected member to connect the tubular member to the connected member, for example, for connecting a drain inflow pipe to a drainage basin. It is related with the connection apparatus.
[0002]
[Prior art]
Wastewater discharged from the baths, kitchen sinks, washrooms, toilets, etc. in the housing flowed through drainage inflow pipes buried in the ground in the residential land, and joined together at a residential tub installed at the confluence of multiple flows Later, it flows through the drain pipe.
Then, the wastewater flows through a public dredger installed inside or outside the housing lot and a drainage outflow pipe connected to the public dredger, and then discharged to a public sewer main outside the housing lot.
[0003]
The house basket is a basket installed in a residential land and having an invert portion with various structures, and a trap may be provided as necessary. The public dredging is a final dredging that is installed inside or outside the housing lot and flows the drainage water inside the housing lot into the sewer main outside the housing lot.
Drainage basins called public basins and installation basins are also a type of premises basin and are generally called drainage basins. These drainage basins are made of hard synthetic resin such as polypropylene or polyvinyl chloride. It is formed as a material.
A cleaning port is attached to the top of a drainage basin such as a residential tub or a public tub, and the upper end of the cleaning port is closed by a lid. The drainage pipes composed of the drainage pipes, residential traps, drainage pipes, public pipes, drainage outlet pipes, and public sewer mains do not increase the amount of drainage due to intrusion of so-called unknown water such as rainwater and groundwater. As a whole, it has a sealed structure.
[0004]
In general, in sewerage works such as so-called surface maintenance projects carried out by local governments, a large-diameter public sewer main that becomes the main drainage is laid first in the ground such as roads, and it can be applied inside or outside the residential land. Install a public dredging for residential land and connect the drainage outlet pipe branched from the sewer main to this public dredging.
[0005]
In many cases, the drainage basin is integrally provided with a socket (or outlet) for the inlet side connection port on the side wall, but a drainage basin in which the inlet side connection port is not provided in advance is also used.
When using the latter type of drainage basin as a public basin, bury it in a state without providing a connection port on the entrance side, and connect the drainage inflow pipe to this basin during plumbing for drainage in the residential area. Will wait.
[0006]
FIG. 9 is an explanatory view showing a conventional technique for connecting a drainage inflow pipe (drainage pipe) when using a drainage basin without an opening on the inlet side in advance as a public basin.
The drainage basin 1 shown in FIG. 9 (A) is installed in the residential land, and the drainage outflow pipe 3 connected to the outlet side connection port 2 of the drainage basin 1 is connected from the residential land to the public sewer main outside the residential land. It is connected. In the surface maintenance business or the like, the drainage basin 1 is buried in the ground without forming the opening 8.
[0007]
In the construction work of the drainage pipe in the residential area, the resident side digs up and exposes the periphery of the drainage basin 1, attaches the inlet side connection port 5 to the side wall 4 of the drainage basin 1, and then connects the drainage inflow pipe 6. Do.
In this case, the connection direction of the drainage inflow pipe 6 with respect to the drainage basin 1 is often different for each residential land depending on the shape and layout of the building in the residential land, the layout of the water supply and the gas pipe, and the like. Therefore, in the connection work, the opening 8 is formed in the side wall 4 by the hole saw 7 in accordance with the connection direction and the connection position of the drainage inflow pipe 6 (FIG. 9A).
Next, the inlet side connection port 5 shown in FIG. 9B is fixed to the side wall 4 with an adhesive in accordance with the position of the opening 8. The inlet side connection port 5 is fastened and fixed with a wire 9 or the like so that the inlet side connection port 5 does not move until the adhesive is cured and exhibits adhesive strength (FIG. 9C).
[0008]
[Problems to be solved by the invention]
Thus, conventionally, since the inlet side connection port 5 is fixed to the side wall 4 with an adhesive, the bonding work and the work of winding the wire 9 are complicated and take a long time.
In addition, since the side wall 4 and the inlet side connection port 5 are integrated, it is difficult to connect the drainage inflow tube 6 if there is a deviation in the position or direction of the inlet side connection port 5 and the drainage inflow tube 6. When the inflow pipe 6 is vibrated due to an earthquake after the installation work of the inflow pipe 6, there is a possibility that the connecting portion of the pipe is damaged.
Further, in order to wind the wire 9 around the entire circumference of the side wall 4, it is necessary to dig up the earth and sand around the drainage basin 1 over the entire circumference, and this digging work is troublesome.
[0009]
FIG. 10 is a partial perspective view showing another conventional technique for connecting the rainwater inflow pipe 13 to the rainwater tank 11.
In the technique shown in FIG. 10, a ring-shaped rubber seal packing 10 is attached to an opening formed in the side wall 12 of the rainwater tank 11. The rainwater inflow pipe 13 is inserted into the seal packing 10 against the elastic force of rubber.
[0010]
In this case, since the rainwater inflow pipe 13 is not positioned and held with respect to the seal packing 10, it is unstable and the sealing performance is not sufficient, and there is a possibility of causing water leakage from the seal packing 10. Therefore, this connection structure could not be applied to the connection of piping in the drainage basin.
Further, since the frictional resistance is large when the rainwater inflow pipe 13 is inserted into the seal packing 10, the insertion operation is difficult.
[0011]
The present invention has been made to solve such a problem, and the tubular member can be attached to the opening of the wall portion of the connected member by a simple operation without using an adhesive. It is an object of the present invention to provide a pipe connecting device capable of supporting a tubular member with a good sealing property and in a stable state.
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is a pipe connecting device that is attached to an opening formed in a wall portion of a connected member and connects a tubular member to the connected member, Before mounting this connection device on the part, the front side has a concave shape, and after mounting, the front side expands to a cylindrical diameter-expandable member and fits to the inner periphery of this diameter-expandable member A cylindrical ring-shaped member slidable in the central axis direction and a locking portion locked to the peripheral edge of the opening are formed on the outer peripheral portion on the front side, and on the outer periphery of the diameter-expandable member. A tubular elastic member that is positioned and fitted in the central axis direction and that allows the tubular member to be fitted to the rear side, and that the front side is recessed before the connection device is mounted. An outer periphery of the diameter-expandable member when the connecting device is attached to the opening. With the elastic member and the ring-shaped member fitted to the inner periphery on the rear side, the engaging portion of the elastic member is engaged with the peripheral edge of the opening, and then the ring-shaped member Is moved forward to increase the diameter of the front side of the elastic member and the elastic member so that the elastic member is in close contact with the peripheral edge of the opening.
[0013]
The connected member is either a drainage basin or a large-diameter pipe, while the tubular member is a small-diameter pipe, and the diameter-expandable member is made of a hard synthetic resin having a substantially cylindrical shape and is disposed on the front side. A plurality of cracks are formed around the central axis, and first and second protrusions are formed at the front end and in the vicinity thereof, and the ring-shaped member is made of a hard synthetic resin having a cylindrical shape. The elastic member is formed of rubber or synthetic resin having a substantially cylindrical shape and having elasticity, and an elastic absorption part is formed on the rear side of the elastic member, and the elastic member can be fastened to the tubular member by a fastening member. The engaging portions of the elastic member are respectively engaged with the first and second convex portions of the diameter-expandable member and engaged with the inner side and the outer side of the peripheral portion, respectively. Preferably it consists of a second locking part
[0014]
Further, at least one detent guide portion is formed on the outer periphery of the ring-shaped member in a direction parallel to the central axis, and at least the inner periphery of the diameter expandable member is engaged with the detent guide portion. It is preferable that one engaged portion is formed in a direction parallel to the central axis.
[0015]
In the connection device, the member to be connected is a drainage basin, and the ring-shaped member has a shape extending in the central axis direction and protrudes into the drainage basin after the connection device is mounted, A trap may be formed inside the drainage basin by connecting a pipe downward to an elbow connected to the ring-shaped member and sealing with water.
[0016]
The elastic member has a shape in which a rear part extends in the central axis direction from an expansion / contraction absorption part formed on the rear side, and the tubular member is mounted rearward of the expansion / contraction absorption part, and the elastic member May be fastened to the tubular member by a fastening member on the rear side.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a pipe connecting device according to the present invention will be described with reference to FIGS.
(First embodiment)
FIGS. 1 to 4 are views showing the first embodiment. FIG. 1 is an exploded plan sectional view of a pipe connecting device. FIGS. 1 (A) and 1 (B) are before and after attachment, respectively. Indicates the state. 2 is an enlarged view of a portion II in FIG. 1, FIG. 3 is a front cross-sectional view of FIG. 1B, and FIG. 4 is a view taken along line IV in FIG.
[0018]
As shown in FIGS. 1 to 4, the pipe connection device 20 of the present invention is attached to an opening 23 formed in the wall portion 22 of the connected member 21, and connects the tubular member 24 to the connected member 21. Used for. For example, the connected member is a drainage basin 21 or a large-diameter pipe, and the tubular member is a small-diameter pipe such as the drainage inflow pipe 24.
The connection device 20 connects the drainage drainage pipe (small-diameter pipe) to the public sewer main (large-diameter pipe), in addition to the connection of the drainage basin such as a residential pit and public pit, and the drainage inflow pipe or drainage outflow pipe. Applicable to the connection of rainwater inflow pipes or rainwater outflow pipes to rainwater tanks (including rainwater installation tanks, rainwater infiltration tanks, rainwater corner tanks, mud pool tanks, etc.) and other pipe connections in pipes that collect rainwater be able to.
[0019]
Since the wall portion 22 of the member to be connected may be a curved surface or a flat surface, the entire shape of the member to be connected may be a rectangular shape or other different shape in addition to a cylindrical shape like the drainage basin 21. Further, the cross section of the tubular member connected to the member to be connected is preferably circular like the drainage inflow pipe 24, but may be oval, oval, or polygonal.
In the following first to third embodiments, the drainage basin 21 and 71 is a substantially cylindrical public basin, and the drainage inflow pipe 24 having a circular cross section is connected to the drainage basin 21 and 71 according to the present invention. The example which applied the connection apparatus is shown.
[0020]
Drainage discharged from drainage sources such as baths, sinks, washrooms and toilets in houses flows through drainage inflow pipes connected to the drainage source. Subsequently, this waste water merges with the waste water flowing through the other waste water inflow pipes at the joining point, and flows to the drain pipe that becomes the drain main pipe.
At the junction, a small-diameter drainage basin such as a house pit is installed for each drainage source. The drain pipe serves as a drain inflow pipe 24 for the downstream public pit (drain pit 21) and is connected to the public pit.
[0021]
The wastewater that has flowed through the drainage inflow pipe 24 through the residential ridge passes through the public pit (drainage basin 21) installed in or outside the residential land, flows through the drainage outflow pipe, and has a large-diameter public sewer book outside the residential land. Join the tube. This sewer main is buried deep underground such as roads outside the residential land.
Drainage pipes with a predetermined gradient that are buried in the ground are composed of drainage inflow pipes, residential pits, drainage pipes (drainage inflow pipes 24), public dredging (drainage pits 21), drainage outflow pipes, and sewer mains. Has been.
In the sewerage construction, first, in the area maintenance project, etc. conducted by the local government, the sewage main is connected to the drainage outflow pipe and the public dredging (drainage 21), and then the house is built in the residential land. At the same time, sewerage work will be done to install drainage pipes in the residential land.
[0022]
The drainage basin 21 is integrally formed of a hard synthetic resin such as polyvinyl chloride, polypropylene, or fiber reinforced plastic (FRP). A cleaning port 26 is attached to the upper part of the drainage basin 21, and an outlet side connection port 29 (FIG. 5) for connecting a drainage outflow pipe is attached to the lower part.
The drainage inflow pipe 24 is connected to a position above the outlet side connection port 29, but when the drainage inflow pipe 24 is not connected, the opening portion 23 is not formed in the wall portion 22 of the drainage basin 21. The opening 23 is formed when the drainage inflow pipe 24 is connected in the sewer construction in the residential land.
[0023]
The upper end portion 27 of the wall portion 22 is a socket-shaped receiving port, and the lower end portion of the cleaning tube 28 can be fitted into the receiving port.
The cleaning tube 28 is connected to the drainage basin 21 upward. A lid receiving frame located on the ground portion is attached to the upper end of the cleaning tube 28, and a lid for closing the cleaning port 26 is detachably attached to the lid receiving frame. A cleaning port 26 for the drainage basin 21 is configured by the cleaning tube 28, the lid receiving frame and the lid.
[0024]
When the drainage basin 21 is installed, the central axis of the drainage basin 21 faces the vertical direction (for example, a substantially vertical direction). A connecting device 20 for connecting the drainage inflow pipe 24 to the drainage basin 21 is attached to the opening 23 formed in the wall portion 22 facing in the vertical direction.
The central axis CL of the connecting device 20 is oriented in the lateral direction (that is, substantially horizontal direction) with respect to the central axis of the drainage basin 21 or is slightly inclined so that the downstream side gradually becomes lower in order to facilitate drainage. doing.
The inlet side connection port 25 of the connection device 20 is a socket-shaped receiving port, and the drainage inflow pipe 24 can be fitted and connected to the receiving port.
[0025]
The connecting device 20 includes a tubular diameter-expandable member 30, a tubular ring-shaped member 33 that is fitted to the inner periphery 32 of the diameter-expandable member 30 and is slidable in the direction of the central axis CL, and a tubular shape And an elastic member 34.
The diameter-expandable member 30 has a shape in which the front side (left direction in FIG. 1) 31 is tapered before the connection device 20 is mounted in the opening 23, and the front side 31 is expanded in diameter after mounting. It has become. Here, “expanding” means increasing the diameter or radius of the member.
In the elastic member 34, a locking portion 36 that is locked to the peripheral edge 35 of the opening 23 of the wall portion 22 is formed on the outer peripheral portion on the front side (left direction in FIG. 1).
The elastic member 34 is positioned and fitted to the outer periphery 37 of the expandable member 30 in the direction of the central axis CL (front-rear direction), and the drain inflow pipe (tubular member) 24 is disposed on the rear inner periphery (or outer periphery). And the front side (left direction in FIG. 1) 38 is in a sag shape before the connection device 20 is mounted.
[0026]
When the connecting device 20 is attached to the opening 23, the elastic member 34 and the ring-shaped member 33 are fitted to the outer periphery 37 and the rear inner periphery 32 of the diameter-expandable member 30, respectively. The locking portion 36 is engaged with the peripheral edge portion 35 of the opening 23.
After that, the ring-shaped member 33 is pushed forward from the rear (or pulled forward) to forcibly move, thereby expanding the diameters of the front sides 31 and 38 of the diameter-expandable member 30 and the elastic member 34. The elastic member 34 is brought into close contact with the peripheral edge 35 of the opening 23 (see FIG. 1B).
[0027]
In the diameter-expandable member 30, a plurality of (for example, 12) cracks 40 are formed around the central axis CL on the front side 31, and the front end 39 and the vicinity thereof are engaged with the engaging portion 36 of the elastic member 34. 1st and 2nd convex parts 41 and 42 to join are formed, respectively.
The diameter-expandable member 30 only needs to be able to increase the diameter of the front side 31 by pushing the ring-shaped member 33 forward from the rear side and forcibly moving it, so that the diameter-expandable member 30 is formed of a material having elasticity without providing the crack 40. It may be possible to expand the diameter.
[0028]
The expandable member 30 and the ring-shaped member 33 are substantially cylindrical and are made of a hard synthetic resin such as polyvinyl chloride, ABS (acrylonitrile-butadiene-styrene copolymer), polyethylene, polypropylene, fiber reinforced plastic (FRP), or the like. It is integrally molded as a material.
Among these materials, if polyethylene or polypropylene is used, the ring-shaped member 33 is preferable in that the inner periphery 32 of the diameter expandable member 30 can smoothly slide with a low frictional resistance.
[0029]
The rear end 43 of the expandable member 30 is orthogonal to the central axis CL, and the crack 40 is not formed in the range from the rear end 43 to the vicinity thereof, and is integrated. The front end 39 of the expandable member 30 has a shape corresponding to the opening 23 having a circular cross section formed in the cylindrical wall portion 22 in the expanded state.
The first convex portion 41 formed at the front end 39 and the second convex portion 42 formed at the rear in the vicinity of the convex portion 41 have a shape corresponding to the peripheral edge portion 35 of the opening 23, and The peripheral edge portion 35 is formed so as to be sandwiched from the front and rear.
The first convex portion 41 is integrally formed so as to protrude outward from the outer periphery 37 of the diameter-expandable member 30 and slightly inward from the inner periphery 32.
[0030]
A return stopper 44 for positioning and holding the ring-shaped member 33 inside the front side 31 is integrally formed on the inner periphery 32 of the diameter expandable member 30. The return stopper 44 is integrally formed in a key shape on the inner periphery 32 to prevent the ring-shaped member 33 from moving backward.
The front end 45 of the ring-shaped member 33 has a shape corresponding to the first convex portion 41 so as to be engageable with the first convex portion 41 of the diameter-expandable member 30, and the rear end 46 is the center. It is orthogonal to the axis CL.
When the ring-shaped member 33 is forcibly pushed forward from the state where it is fitted to the inner periphery 32 on the rear side of the diameter-expandable member 30, the ring-shaped member 33 gets over the return stopper 44 and moves over the front side 31 of the diameter-expandable member 30. Move while expanding diameter.
[0031]
Finally, the front end 45 of the ring-shaped member 33 is locked to the first convex portion 41, and the rear end 46 is locked by the return stopper 44 so as not to move backward. Accordingly, the ring-shaped member 33 is positioned and held inward of the front side 31 of the diameter-expandable member 30, and the front side 31 of the diameter-expandable member 30 is maintained in a state where the diameter is expanded by the ring-shaped member 33. Thus, the entire diameter-expandable member 30 is substantially cylindrical.
As a result, since the outer peripheral surface of the elastic member 34 is in close contact with the peripheral edge 35 of the opening 23, the peripheral edge 35 is well sealed.
[0032]
On the outer periphery 47 of the ring-shaped member 33, one or a plurality (in this embodiment, one) detent guide portion 48 is formed in a direction parallel to the central axis CL. On the inner periphery 32 of the expandable member 30, one or a plurality of (one in this embodiment) engaged portions 49 that engage with the detent guide portion 48 are arranged in a direction parallel to the central axis CL. Is formed.
Since the rotation prevention guide part 48 engages with the engaged part 49, the ring-shaped member 33 moves forward along the center axis CL in a non-rotating state in the diameter-expandable member 30. As a result, the front end 45 of the ring-shaped member 33 can be engaged and brought into close contact with the first convex portion 41 of the front end 39 of the diameter-expandable member 33 as a whole.
[0033]
The elastic member 34 is made of rubber having elasticity and sealing properties, synthetic resin, or the like. For example, rubber excellent in aging resistance, oxidation resistance, and water resistance, such as EPDM (ethylene-propylene-rubber). Is preferably used.
The elastic member 34 having a substantially cylindrical shape is formed with a step portion 34a. The inner diameter is larger on the front side than the step portion 34a, and the inner diameter is smaller on the rear side.
The locking portion 36 of the elastic member 34 includes first and second locking portions 57 and 58. The first and second locking portions 57 and 58 engage with the first and second convex portions 41 and 42 of the diameter-expandable member 30, respectively, and sandwich the peripheral edge portion 35 from the inner side and the outer side. Hold it.
The rear end 43 of the diameter-expandable member 30 abuts on the step portion 34a, and the first and second convex portions 41 and 42 engage with the first and second locking portions 57 and 58, respectively. The diameter-possible member 30 is held inside the elastic member 34.
[0034]
An elastic absorption part 55 is formed on the rear side of the elastic member 34, and the elastic member 34 can be fastened to the drainage inflow pipe 24 by a fastening member 56. The expansion / contraction absorbing portion 55 has an annular shape having a U-shaped cross section or a V-shaped cross section, and is integrally formed so as to protrude perpendicularly to the central axis CL.
An annular recess 59 is integrally formed behind the expansion / contraction absorbing portion 55. A stainless steel band is used for the fastening member 56, and the band 56 is wound around the recess 59. The band 56 has an annular belt-shaped thin plate portion 60 and a screw portion 61, and when the screw portion 61 is turned, the diameter of the thin plate portion 60 is changed to tighten the elastic member 34.
[0035]
In the sewerage construction, first, in the surface improvement project, etc., the pipe from the sewer main to the public dredging (drainage 21) is connected and buried through the drainage outflow pipe.
After that, when a building such as a house is built in the residential land, a construction for installing a drain pipe in the residential land is performed. In this construction, the drainage inflow pipe 24 of the drainage pipe in the residential land is connected to the drainage basin 21.
For that purpose, the drainage basin 21 and the cleaning port 26 are dug up to expose the drainage basin 21. At this time, it is only necessary to attach the connecting device 20 to expose the minimum part necessary for connecting the drainage inflow pipe 24, and it is not necessary to dig up the earth and sand around the entire circumference of the drainage basin 21.
[0036]
Next, as in the case shown in FIG. 9A, an opening 23 is formed in the wall portion 22 of the drainage basin 21 using a hole saw. The opening 23 is formed at a predetermined position corresponding to the direction and height of the drainage inflow pipe 24 at the installation site.
On the other hand, in the connection device 20, the ring-shaped member 33 is fitted to the inner periphery 32 on the rear side of the diameter-expandable member 30, and the inner periphery of the front side 38 of the elastic member 34 is connected to the outer periphery 37 of the diameter-expandable member 30. 38a is fitted.
[0037]
If the first and second convex portions 41 and 42 are engaged with the first and second engaging portions 57 and 58 of the elastic member 34 respectively, and the rear end 43 is engaged with the step portion 34a, the diameter is increased. The possible member 30 is positioned and held in front of the elastic member 34. Further, the band 56 is loosely fitted in the recess 59 of the elastic member 34.
In this way, the connecting device 20 before mounting is prepared in a state in which the diameter-expandable member 30, the ring-shaped member 33, the elastic member 34, and the band 56 are assembled.
At this time, the diameter-expandable member 30 has a shape in which the crack 40 is closed and the front side 31 is recessed, and the front side 38 of the elastic member 34 also corresponds to the shape of the diameter-expandable member 30. It has a sunk shape. Since the outer diameters of the first convex portion 41 and the first locking portion 57 are smaller than the inner diameter of the opening 23, the front side of the connecting device 20 can be mounted inside the opening 23.
[0038]
The diameter-expandable member 30 is formed into a constricted shape by forming a closed crack 40 in advance.
As another example, a plurality of open cracks 40 are formed on the front side 31, and the entire diameter expandable member 30 is formed in advance so as to be in a cylindrical shape parallel to the central axis CL. When the possible member 30 is mounted in the elastic member 34, the crack 40 is closed by the elastic force of the elastic member 34, and the front side 38 of the elastic member 34 and the front side 31 of the diameter-expandable member 30 become concave. You may do it.
[0039]
The connecting device 20 in which the constituent members 30, 33, 34, and 56 are assembled is moved to the front side of the central axis CL and is loosely attached to the opening 23 of the drainage basin 21. The first engaging portion 57 and the first convex portion 41 are engaged with the inner side of the peripheral portion 35 of the opening 23, and the second engaging portion 58 and the second convex portion are provided on the outer side of the peripheral portion 35. 42 is engaged.
Next, if the drainage inflow pipe 24 is inserted into the elastic member 34 from the rear side and pressed against the rear end 46 of the ring-shaped member 33 and forcibly moved forward, the ring-shaped member 33 can be expanded. The inner periphery 32 of 30 is smoothly moved with a small frictional resistance.
In the state in which the ring-shaped member 33 has moved most forward, the front end 45 and the rear end 46 of the ring-shaped member 33 are respectively locked by the first convex portion 41 and the return stopper 44 of the diameter-expandable member 30. Retained. Since the ring-shaped member 33 is guided by the anti-rotation guide portion 48 and the engaged portion 49 and is prevented from rotating, the ring-shaped member 33 does not rotate and cause a positional shift.
[0040]
Since the ring-shaped member 33 has moved to the front side 31 of the diameter-expandable member 30, the diameter-expandable member 30 and the front sides 31, 38 of the elastic member 34 are pushed and expanded by the ring-shaped member 33.
Thereby, since the latching | locking part 36 of the elastic member 34 adheres strongly over the perimeter of the peripheral part 35 of the opening part 23, this contact part is sealed favorably.
[0041]
Thus, after attaching the connecting device 20 and the drainage inflow pipe 24 to the drainage basin 21, when the screw portion 61 of the band 56 is screwed and tightened, the elastic member 34 is in close contact with the drainage inflow pipe 24 and sealed.
As described above, if the ring-shaped member 33 is pushed and moved forward by the drainage inflow pipe 24, the attachment work of the connection device 20 to the drainage basin 21 and the connection work of the drainage inflow pipe 24 to the connection device 20 can be performed simultaneously. , Piping work becomes easy.
In order to move the ring-shaped member 33 forward, the rear end 46 may be pushed in with a jig.
[0042]
Thus, after the drainage inflow pipe 24 is connected to the drainage basin 21 through the connecting device 20 and the connection work of the drainage pipe in the residential land is completed, the earth and sand are backfilled to bury the drainage pipe. In this drainage pipe, the drainage discharged from the sink of the house, etc. flows through the drainage inflow pipe, the house basin, the drainage inflow pipe 24 (drainage pipe) under the natural flow, and flows out through the public pole (drainage basin 21). It flows into the sewer main from the pipe.
[0043]
Since the expansion / contraction absorbing portion 55 is provided in the connecting device 20, even if a force due to an earthquake or other vibration is applied to the connecting portion between the drainage basin 21 and the drainage inflow pipe 24, the expansion / contraction absorbing portion 55 is deformed. Since the force is absorbed, the drainage basin 21 and the drainage inflow pipe 24 can be prevented from being damaged.
Since the drainage inflow pipe 24 attached to the connecting device 20 is pressed against the ring-shaped member 33, the crack 40 of the diameter expandable member 30 is covered with the ring-shaped member 33 and the drainage inflow pipe 24 and does not contact the drainage. . Therefore, the crack 40 does not become a resistance of the flow of drainage.
[0044]
(Second Embodiment)
FIG. 5 is a front sectional view showing a state in which the connecting device 70 according to the second embodiment of the present invention is attached to the drainage basin 71, and FIG. 6 is an enlarged sectional view of the VI part of FIG.
In each of the following embodiments, the same or corresponding parts as those in the other embodiments are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
[0045]
As shown in FIGS. 5 and 6, the drainage 71 as a connected member has a deodorizing trap function.
The ring-shaped member 72 fitted into the expandable member 30 has a shape extending in the central axis CL direction. The ring-shaped member 72 protrudes into the drainage basin 71 after the connection device 70 is attached to the opening 23 of the wall 22 of the drainage basin 71. The front end 73 of the ring-shaped member 72 has a shape orthogonal to the central axis CL.
[0046]
In this connection device 70, the trap 75 is formed inside the drainage basin 71 by connecting the pipe 75 downward to the elbow 74 connected to the front end 73 of the ring-shaped member 72 and sealing it with water. .
The elbow 74 is a 90 degree elbow, and the pipe 75 is attached to the outlet side of the elbow 74. Since the drainage 77 is always stored inside the drainage basin 71 and the outlet portion of the pipe 75 is located below the water surface 78 of the drainage 77, a trap 76 is formed.
[0047]
Another stopper 79 is formed on the first convex portion 41 provided at the front end 39 of the diameter expandable member 30 so as to protrude radially inward. A recess 81 is formed on the outer periphery 80 of the ring-shaped member 72, and another stopper 79 can be engaged with the recess 81.
Therefore, when the connecting device 70 is attached to the drainage basin 71, if the ring-shaped member 72 is pushed in and forced to move forward from the rear, the rear end 46 of the ring-shaped member 72 is locked to the return stopper 44, The concave portion 81 is locked to another stopper 79 of the first convex portion 41 of the diameter expandable member 30.
As a result, the ring-shaped member 72 is positioned and held so as not to move in the front-rear direction, so that the elbow 74 and the pipe 75 are firmly supported by the ring-shaped member 72.
[0048]
(Third embodiment)
FIG. 7 is a front sectional view showing a state in which the connecting device 90 according to the third embodiment of the present invention is attached to the drainage basin 21, and FIG. 8 is a front sectional view showing the operation thereof.
In the connecting device 90 shown in FIG. 7, the elastic member 91 has a shape in which the rear portion 93 extends in the direction of the central axis CL from the expansion / contraction absorption portion 92 formed on the rear side, and the drainage inflow pipe 24 has the expansion / contraction absorption portion 92. It is mounted more rearward. The elastic member 91 is fastened to the drainage inflow pipe 24 by the band 56 at the rear portion 93.
[0049]
The drainage basin 21 and the drainage inflow pipe 24 are connected via an elastic member 91, and the elastic member 91 can be largely deformed by the expansion / contraction absorbing portion 92. Further, the expansion / contraction absorbing portion 92 and the vicinity thereof constitute a part of the pipe, and the wall thickness is increased in order to increase the strength against elastic deformation.
A step portion 94 is formed in the rear portion 93, and the drainage inflow pipe 24 is positioned in contact with the step portion 94.
[0050]
As shown in FIG. 8, since the drainage inflow pipe 24 can be moved in a relatively wide range as indicated by an arrow B by the elastically deformable stretchable absorbing portion 92, the position of the drainage inflow pipe 24 relative to the drainage basin 21 The degree of freedom of angle is increased and the earthquake resistance is improved.
Therefore, even if there is an earthquake or vibration, it is possible to prevent the connection portion between the drainage basin 21 and the drainage inflow pipe 24 from being damaged. Further, the drainage inflow pipe 24 can be easily connected to the connection device 90 without simplifying the opening 23 by piping work, and the piping work is simplified.
[0051]
In the connection devices 20, 70, 90 of the present invention, since no adhesive is used, the conventional bonding work and the work of winding a wire become unnecessary, and the drain inflow pipe 24 is connected to the opening 23 of the wall 22 of the drainage basin 21, 71. Can be installed in a simple operation.
In addition, since the elastic members 34 and 91 are forcibly pressed and adhered to the peripheral edge 35 of the opening 23 via the diameter-expandable member 30 by the ring-shaped members 33 and 72, It is firmly fixed to 71.
Therefore, compared with the prior art using a ring-shaped seal packing as shown in FIG. 10, the connection device of the present invention can support the drainage inflow pipe 24 in a stable and stable state. Suitable for connecting pipes in dredging and rainwater dredging.
In particular, when the drainage is made of polypropylene or the like, it is difficult to select an adhesive that exhibits sufficient adhesive strength.However, since the adhesive is not used in the present invention, a drainage inflow pipe is attached to such a drainage. Can be connected easily.
[0052]
In the present invention, the connecting device is attached to the drainage basin by a simple one-touch operation in which the components of the connecting device are assembled and attached to the opening 23 and the ring-shaped members 33 and 72 are forcibly moved forward. Can do.
In the prior art shown in FIG. 9, since the wire was wound around the drainage basin, it was necessary to dig up the entire circumference of the drainage basin. However, in the present invention, if the minimum part around the opening is dug up, It ’s good, so it ’s easier to dig.
In the drawings, the same reference numerals denote the same or corresponding parts.
[0053]
【The invention's effect】
Since the present invention is configured as described above, the tubular member can be attached to the opening of the wall portion of the connected member with a simple operation without using an adhesive. It can be supported in a stable state.
[Brief description of the drawings]
FIG. 1 to FIG. 4 are views showing a first embodiment of the present invention, and FIG. 1 is an exploded sectional plan view of a pipe connecting device.
FIG. 2 is an enlarged view of a portion II in FIG.
FIG. 3 is a front sectional view of FIG.
4 is a view taken along line IV in FIG. 3;
FIG. 5 is a front cross-sectional view showing a state in which a connecting device according to a second embodiment of the present invention is attached to a drain.
6 is an enlarged cross-sectional view of a VI part in FIG. 5;
FIG. 7 is a front cross-sectional view showing a state in which a connecting device according to a third embodiment of the present invention is attached to a drain.
FIG. 8 is a front sectional view showing the operation of FIG. 7;
FIG. 9 is an explanatory view showing a conventional technique for connecting a drain inflow pipe to a public pit.
FIG. 10 is a partial perspective view showing another conventional technique for connecting a rainwater inflow pipe to a rainwater tank.
[Explanation of symbols]
20, 70, 90 connection device
21, 71 Drainage (member to be connected)
22 Wall
23 opening
24 Drainage inflow pipe (tubular member)
30 Expandable member
31 Front side
32 Inner circumference
33,72 Ring-shaped member
34,91 Elastic member
35 Perimeter
36 Locking part
37 outer circumference
38 Front side
39 Front end of expandable member
40 split
41 1st convex part
42 2nd convex part
48 Non-rotating guide
49 engaged part
55,92 Stretch / absorption part
56 Band (fastening member)
57 First locking portion
58 Second locking portion
74 Elbow
75 pipe
76 traps
93 rear part
CL center axis

Claims (5)

A pipe connecting device that is attached to an opening formed in a wall of a connected member and connects a tubular member to the connected member,
Before mounting the connecting device in the opening, the front side has a concave shape, and after mounting, a cylindrical diameter-expandable member whose front side is expanded,
A cylindrical ring-shaped member that fits on the inner periphery of the diameter-expandable member and is slidable in the central axis direction;
A locking portion that is locked to the peripheral edge of the opening is formed on the outer peripheral portion on the front side, and is positioned and fitted to the outer periphery of the diameter-expandable member in the central axis direction and the tubular portion on the rear side It is possible to fit a member, and before mounting the connecting device, a cylindrical elastic member having a shape in which the front side is recessed,
When the connecting device is mounted in the opening, the elastic member and the ring-shaped member are fitted to the outer periphery of the diameter-expandable member and the inner periphery on the rear side, respectively. Engaging a portion with the peripheral edge of the opening,
Thereafter, by moving the ring-shaped member forward, the diameter-expandable member and each front side of the elastic member are expanded, and the elastic member is brought into close contact with the peripheral portion of the opening. Piping connection device characterized by The connected member is either a drain or a large-diameter pipe, while the tubular member is a small-diameter pipe,
The diameter-expandable member is made of a hard synthetic resin having a substantially cylindrical shape, and a plurality of cracks are formed around the central axis on the front side, and the first and second protrusions are formed at the front end and in the vicinity thereof. Each part is formed,
The ring-shaped member is made of a hard synthetic resin having a cylindrical shape,
The elastic member is formed of rubber or synthetic resin having a substantially cylindrical shape and having elasticity, and an elastic absorption part is formed on the rear side of the elastic member so that the elastic member can be fastened to the tubular member by a fastening member. The locking portion of the elastic member engages with the first and second convex portions of the diameter-expandable member and engages with the inner side and the outer side of the peripheral portion, respectively. The pipe connection device according to claim 1, comprising two locking portions. At least one detent guide portion is formed on the outer periphery of the ring-shaped member in a direction parallel to the central axis,
3. An inner periphery of the diameter-expandable member is formed with at least one engaged portion that engages with the detent guide portion in a direction parallel to the central axis. The piping connection device described in 1. The connected member is a drainage basin,
The ring-shaped member has a shape extending in the central axis direction and protrudes into the drainage basin after the connection device is mounted,
The pipe according to claim 1, 2 or 3, wherein a trap is formed inside the drainage basin by connecting a pipe downward to an elbow connected to the ring-shaped member and sealing with water. Connection device. The elastic member has a shape in which a rear portion extends in a direction of the central axis from an expansion / contraction absorption portion formed on the rear side, the tubular member is mounted rearward of the expansion / contraction absorption portion, and the elastic member is The pipe connecting device according to any one of claims 1 to 4, wherein the pipe connecting device is fastened to the tubular member by a fastening member on a rear side.

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