JP2008274620A - Sleeve pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently separate a sleeve pipe after the placing of concrete from an embedded portion of a protrusion from a concrete layer, without the need for much labor. <P>SOLUTION: The protrusion 4 of the sleeve pipe 10 can be freely attached to/detached from the embedded portion 5. In one detachable type, on the side where the protrusion 4 and the embedded portion 5 face each other, one is formed in such a shape that the pipe is thin-walled from the side of an outer peripheral surface over a prescribed range along an axial direction from its leading end, and the other is formed in such a shape that the pipe is thin-walled from the side of an inner peripheral surface over a prescribed range along an axial direction from its leading end, so that a relationship between a spigot 6 and a socket 7 for being fitted to each other can be established. Otherwise, in a type in which the protrusion can be freely attached to/detached from the embedded portion, an adapter socket is interposed between both of them. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, in order to pipe the flexible pipe joint for water supply and drainage pipes in the foundation concrete layer under the floor of the building in such a manner that the flexible pipe joint can be inserted and removed, It relates to the “sheath tube” that has been inserted into.

  Conventionally, in the detached house field, drainage from drainage equipment such as indoor toilets, vanity tables, bathrooms, etc. flows into the drainage mass provided on the outdoor side, and after flowing into this drainage mass, the drainage downstream After passing through the trout, it is finally collected by the public trout and drained into the sewer main.

  The drainage pipe connecting each drainage device and drainage mass is a foundation concrete layer (hereinafter also simply referred to as a concrete layer) that forms the foundation of a building such as moisture-proof concrete or concrete slab formed under the floor directly below each device. After passing through, it reaches the drainage mass. In the portion that penetrates the concrete layer, the drain pipe is completely embedded in the concrete layer so that the drain pipe is completely covered with concrete. The above is the conventional general drain pipe structure.

  However, the evaluation method standard for easy maintenance performance of the “Housing Quality Assurance Promotion Act” enforced in June 2000 states that “exclusive piping is not in concrete, except for through-walls, floors, pillars or beam penetrations. It is stipulated that “in a detached house, underground pipes are not embedded in the structure of the building, under the slab or in the solid foundation of the concrete”. Therefore, the above-mentioned conventional drainage pipe structure cannot satisfy this standard.

  Therefore, in order to cope with this, for example, in the piping structure of a drainage pipe of a building disclosed in the following publicly known document (Patent Document 1), first, the drainage pipe is passed through the concrete layer and the concrete layer. Passing through the concrete layer, it is divided into the part connected to the lower floor end of the part passing through the floor and reaching the indoor drainage equipment and the part connected to the outdoor side (geological side) end and reaching the outdoor drainage mass. The portion to be installed is not directly buried and fixed in the concrete layer, but is piped through a “sheath pipe” that is embedded and fixed in the concrete layer.

  Therefore, the drainage pipe inserted through this "sheath pipe" is a pipe joint that connects the drainage pipe leading to the indoor drainage equipment and the drainage pipe leading to the outdoor drainage mass. It is a flexible joint having flexibility so that it can be inserted and removed freely.

  For example, as one specific example of the flexible pipe joint, a connection part for connecting a drain pipe leading to an indoor drainage device to one end of a flexible part formed in a bellows shape using vinyl chloride resin, polyethylene resin, or the like; In some cases, the other end is provided with a connecting portion adapted to connect a drain pipe leading to an outdoor drainage mass.

  As described above, the “sheath pipe” through which such a flexible pipe joint is inserted is embedded and fixed in the concrete layer. The pipe shaft has a curved portion so as to avoid the interference with the reinforcing bar so as not to omit the reinforcing bar (the reinforcing bar).

  That is, it has a form having a rising straight portion that forms an angle of 45 ° to 90 ° with respect to the straight portion from the reference straight portion, and is generally embedded in a concrete layer. The piping is arranged such that the reference straight line portion is horizontal and faces the outdoors (the stratum), and the oblique rising straight portion faces the floor below.

  The total length of the tube shaft is such that when the concrete is placed, the tube shaft protrudes out of the concrete layer from the surface below the floor of the concrete layer and the surface facing the outdoor side (the formation layer side). This is because when there is no such protruding part and the dimension of the sheath pipe end face coincides with the surface of the concrete layer, the cement easily enters the sheath pipe when the concrete is placed. This is because the pipe joint cannot be inserted into the sheath if it remains in the sheath.

  Since the sheath tube is curved as described above, it is not necessary to look into the interior accurately from one end face. To remove the cement that has entered the sheath tube when placing concrete, it takes extra effort. Because it takes time.

  Thus, when placing concrete, it is a “sheath pipe” that has protrusions from both surfaces of the concrete layer, but the concrete placement is finished, the concrete has hardened, and the pipe joint is inserted into the sheath pipe. Before, the projecting part is cut by a cutting machine or a cutting tool at a position crossing the surface of the concrete layer so that the end face of the sheath and the surface of the concrete layer coincide.

This is because if there is a sheath pipe protrusion on the surface of the concrete layer, especially on the lower floor surface of the concrete layer, the drain pipe connected to the indoor drainage equipment will be more than the vertical height of the protrusion. When it is necessary to pipe at a high position and the drain pipe runs from the surface of the concrete layer to a high position, when inspecting and repairing the equipment installed under the floor, including the drain pipe, This is because it is difficult to get over the drain pipe. The sheath tube is made of a synthetic resin such as polyvinyl chloride or polyethylene so that it can be easily cut.
JP 2002-294781 A

  As described above, the sheath pipe is cut after the concrete is cast using a cutting machine or a cutting tool, but the sheath pipe is often installed for each drainage device. Cutting the projecting portion of each sheath tube is laborious and time consuming.

  Therefore, the problem of the present invention is that when the concrete is placed, the sheath projecting from the surface of the concrete layer can be easily separated from the buried portion after the concrete is placed, and the drain pipe is constructed. The goal is to be able to do it efficiently.

  In order to solve the above-mentioned problems, the invention according to claim 1 is the above-described sheath pipe, and a projecting portion projecting from at least the floor underside of the underfloor side and the outdoor side surface embedded in the foundation concrete layer. The configuration is such that the part is detachable.

  Since it did in this way, isolation | separation of a protrusion part becomes a simple operation | work which an operator does not use a cutting machine or a cutting tool, but only hands the protrusion part and pulls it out.

  As a form in which the protruding portion is detachable from the embedded portion, the invention according to claim 2 is the sheath pipe according to claim 1, wherein the opposite side of the protruding portion and the embedded portion is: A configuration in which the insertion port and the reception port are fitted to each other is adopted, and the invention according to claim 3 employs a configuration in which an adapter socket is interposed between the protruding portion and the embedded portion. It is.

  According to a fourth aspect of the present invention, in the sheath pipe according to any one of the first to third aspects, an operator's hand or an auxiliary tool who is going to separate the protruding portion from the embedded portion is easily caught. The configuration with the hook shape was adopted.

  By doing so, the projecting part is separated through the hook shape, so that there is no such hook shape, and the force is more efficient than when it is done by friction between the operator's hand and the pipe circumference. It is easily transmitted to the projecting part and can be separated from the buried part easily and efficiently.

  A fifth aspect of the present invention is the sheath pipe according to any one of the first to fourth aspects, wherein the end face of the projecting portion of the foundation concrete layer from the lower floor surface faces the outdoor side. A configuration that is parallel to the tube axis of the straight portion is adopted.

  By doing so, by checking the level of the end face of the projecting part from the surface below the floor, the level of the horizontally arranged straight part can be checked, and the entire sheath pipe is the standard for the concrete placement area. It can be confirmed that it is installed at the installation position.

  The invention according to claim 6 is a feed / drain pipe basic penetration kit comprising the sheath pipe according to any one of claims 1 to 5 and a flexible pipe joint inserted into the sheath pipe. If the water supply / drainage pipe foundation penetration kit is used, the sheath pipe has the above-described action, and the work efficiency is improved when the water supply / drainage pipe is piped to the foundation concrete layer.

  Since the present invention adopts the configuration as described above, the separation work of the sheath projection after placing the concrete is not a troublesome work of cutting using a cutting machine or a cutting tool as in the past. Since it can be performed by a simple and easy work by simply holding and pulling out the protruding portion, there is an effect that the work efficiency of the piping into the foundation concrete layer is improved.

  In addition, if the protruding portion of the separated sheath tube is manufactured as an embedded portion having a shape of the attachment / detachment portion and a pair of attachment / detachment shapes, it can be reused again as one sheath tube, so resources are wasted. There is also an advantage that it is eliminated and does not lead to environmental pollution.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Below, although 1st and 2nd embodiment is shown, first, the shape of the whole sheath common to both embodiment is demonstrated with reference to FIG. In the figure, reference numerals in parentheses correspond to a second embodiment described later. FIG. 1A shows the overall shape of a single “sheath tube 10 (20)” of both embodiments. FIG. 1B shows the “sheath tube 10 ( 20) "is schematically shown as being embedded in a foundation concrete layer C (hereinafter also simply referred to as a concrete layer C) of a building. In the figure, what is indicated by a two-dot chain line is an adapter socket in a second embodiment described later (the one denoted by reference numeral 30 in FIG. 3).

  First, as shown in FIG. 1 (a), the sheath 10 (20) has a curved portion 2 (for preventing interference with the reinforcement in the foundation concrete layer C as described in the background art section. 12), and rises from the horizontal straight line portion 1 (11) through the curved portion 2 (12) and with respect to the original horizontal straight line portion 1 (11) as a “rising straight line portion 3 (13)”. It is connected to. As described above, the rising angle is generally in the range of 45 ° to 90 °. FIG. 1A shows the rising straight portion 3 (13) with respect to the horizontal straight portion 1 (11). The rising angle is 45 degrees.

  And as shown in FIG.1 (b), it arrange | positions horizontally so that the edge part of the horizontal straight part 1 (11) may face the outdoor B (stratum) side, and the end of the rising straight part 3 (13) Piping so that the section faces the floor A side of the building. Hereinafter, the horizontal straight line portion 1 is also referred to as “horizontal arrangement straight line portion 1 (11)”.

Further, as the other characteristic shapes of the sheath tube 10 of both embodiments (20), the horizontal facing the end surface 4a of the protruding portions from the floor surface C ₁ of the foundation concrete layer C of (14a) to the outside B (formation) side It is made so as to be parallel to the tube axis of the arrangement straight part 1 (11).

  By doing so, by checking the “levelness” of the end face 4a (14a) of the projecting portion 4 (14) from the underfloor surface C1 of the concrete layer C with a level meter, This is because it can be confirmed that the portion 1 (11) is also disposed horizontally, and therefore, it can be confirmed that the entire sheath tube 10 (20) is piped at a standard installation position with respect to the concrete placing region.

  Further, in both embodiments, an operator is provided on the outer surface of the projecting portion 4 (14) so that the projecting portion 4 (14) that is detachable from the embedded portion 5 (15) can be separated more easily. A long hole 8 in the circumferential direction is provided as a hook shape so that the hand or auxiliary tool can be easily hooked.

  The above is the overall shape of the sheath 10 (20) common to the first and second embodiments described below, and the embedding form thereof. Next, the first embodiment will be described first.

(First embodiment)
FIG. 2 shows a first embodiment. In the present invention, the projecting portion 4 from the underfloor surface C ₁ of the foundation concrete layer C at the time of concrete placement is detachable from the buried portion 5 in order to separate from the buried portion 5 after the concrete placement. However, in the first embodiment, as a detachable form, the shape of the projecting portion 4 and the embedded portion 5 on the opposite end side is in the relationship of “insert 6” and “receiver 7”. is there. FIG. 2 shows the state of the sheath tube 10 in the vicinity of the separation position of the projecting portion 4 and the embedded portion 5 together with the surrounding concrete layer C in (a) in a partially enlarged view, and (b) and (c) are respectively shown. The entire protruding portion 4 and only a part of the embedded portion 5 are taken out and shown in a perspective view.

  As shown in FIG. 2, the projecting portion 4 is formed by thinning the thickness of the tube from the outer peripheral surface side on the side facing the embedded portion 5 over a predetermined range along the axial direction from the tip thereof. The embedding portion 5 is a “receiving port” in which the thickness of the pipe is thinned from the inner peripheral surface side over a predetermined range along the axial direction from the distal end on the side facing the protruding portion 4. 7 ”, the insertion port 6 and the receiving port 7 are dimensioned and fitted to each other so that they can be attached and detached.

  In the first embodiment, the protruding portion 4 side is the “insert 6” and the embedded portion 5 side is the “receiving port 7”. On the contrary, the protruding portion 4 side is the “receiving port” and the embedded portion is embedded. The part 5 side may be used as an “inlet”.

(Second embodiment)
The sheath tube 20 of the second embodiment shown in FIG. 3 is such that the protruding portion 14 is detachable from the embedded portion 15 and an adapter socket 30 is interposed therebetween. FIG. 3 shows a simple oblique cylinder as an example of the adapter socket 30. FIG. 3A shows a state where the adapter socket 30 is interposed and the embedded portion 15 and the protruding portion 14 are set, and the pipe is placed in the concrete layer C. FIG. 3B shows the adapter socket 30 alone. Is shown in a perspective view.

  As shown in the figure, the adapter socket 30 has a predetermined depth in the axial direction from both ends of the inclined cylinder, which is a fitting portion 31 between the protruding portion 14 and the embedded portion 15, and a stepped portion at the center. Both surfaces of 32 are the abutting surfaces of the protruding portion 14 and the embedded portion 15.

  In the sheath tube 20 of the second embodiment, as shown in the figure, both the embedded portion 15 and the protruding portion 14 take the form of “insertion” with respect to the adapter socket 30, but the shape of the end portion thereof. The predetermined range near the end is not thin as in the first embodiment, but the thickness of the entire sheath 20 is constant.

  The outer diameter of the adapter socket 30 is sized so as to fit with the inner peripheral surface of the fitting portion 31 near both ends. Further, as described above, the end surfaces of the embedded portion 15 and the projecting portion 14 abut against the opposing surface of the stepped portion 32 at the center of the adapter socket 30. The above is the sheath tube 10 (20) of the first and second embodiments in which the protruding portion 4 (14) and the embedded portion 5 (15) are separated, but when piping to the concrete placement region. The points common to both embodiments will be described again.

  As a general size and shape of the sheath tube 10 (20) used at the current construction site of a house, the drainage has two outer diameters of 89 mm and 114 mm, and 60 mm for water supply and hot water supply. Often used.

  When a cylinder (sheath tube 10 (20)) having an outer diameter in the range of 60 mm to 120 mm is embedded in the concrete layer C at a rising angle of 45 ° to 90 ° as described above, It is known from experience that when the burial depth is 50 mm or more from the surface of the concrete layer C, extraction from the concrete layer C is difficult.

Therefore, in the case where the projecting portion 4 (14) and the embedded portion 5 (15) are separated in advance as in the sheath tube 10 (20) of the present invention, it is used as the concrete placement planned area. When piping, the separation position should not be at a depth of 50 mm or more perpendicularly inward from the underfloor surface C ₁ of the concrete layer C.

That is, when the separation position of the projecting portion 4 (14) and the embedded portion is set to the “insert 6” and the “receiver 7” as in the first embodiment, it is indicated by the symbol d ₁ in FIG. Since the position becomes the separation position, it is important to pipe the “sheath pipe 10” so that the vertical distance X ₁ from the under floor surface C ₁ of the concrete layer C of d ₁ is within 50 mm.

Further, when the “adapter socket 30” shown in FIG. 3 of the second embodiment is used, the upper end face of the slanted cylinder of the adapter socket 30 corresponds to the “separation position” d ₂ . In this case, in order to easily separate the protruding portion 14 from the embedded portion 15, the vertical distance X ₂ from the lower floor surface C ₁ of the concrete layer C of d ₂ is set to be within 50 mm. .

The depth limit of the separation position of the projecting portion 4 (14) and the buried portion 5 (15) is set as described above, and further, care is taken when piping the sheath tube 10 (20) to the concrete placement region. to point, the protruding portion 4 (14), projecting from the floor surface C ₁ of the concrete layer C height 30mm or more, it should be within 80 mm.

  This is a general dimension of the sheath pipe 10 (20) that is frequently used at the construction site of the current house, and relates to the above-mentioned "outer diameter" (89 mm for drainage, 114 mm, 60 mm for water supply / hot water supply) ), The rising angle of the rising straight portion 3 (13) is in the range of 45 ° to 90 °, and the “horizontal distance D” and the “vertical distance H” shown in FIG. Is 500 mm to 700 mm, and the vertical distance is 230 mm to 350 mm. However, the sheath and the horizontal arrangement linear part 1 (11) of the tube 10 (20) in such a range are not arranged exactly horizontally. In addition, in the case where the projection 4 (14) is swung downward, the projection 4 (14) cannot satisfy the predetermined projection amount. If the deflection exceeds the allowable limit, the projection 4 (14) It will be buried in the concrete layer C It becomes door.

  For this reason, the “sheath tube 10 (20)”, which is generally widely used in the dimensions and shapes in the above ranges at the current home construction site, has been predicted based on experience so far. As the lower limit of the absorption allowance for downward “runout” during piping 20), a protrusion amount of 30 mm is necessary.

  On the other hand, the upper limit of the vibration absorption allowance is set to 80 mm because if the protrusion amount is set to be larger than this, this time, it becomes a height higher than the absorption allowance for swinging downward, resulting in an excessive protrusion amount. .

In addition, what has just been described is the end face of the embedded portion 5 in the first embodiment or the second surface after the projection 4 (14) is separated due to fluctuations in the pipe of the sheath 10 (20). In this embodiment, when the end face of the adapter socket 30 is located inside the concrete layer C or outside, the allowable amount of the distance from the underfloor surface C ₁ of the concrete layer C. The end surfaces of the buried portions 5 and the end surfaces of the adapter sockets 30 are desirably originally along the floor lower surface C ₁ of the concrete layer C.

When the flexible pipe joint is inserted into the embedded portion 5 (15) of the sheath 10 (20) after separation of the projecting portion 4 (14), the end face of the embedded portion 5 (15) If the end surface of the adapter socket 30 protrudes from the underfloor surface C ₁ of the concrete layer C, the flexible pipe joint interferes with the protruding portion 4 (14), and the end surface of the embedded portion 5 (15) When the end face of the adapter socket 30 is buried from the lower floor surface C ₁ of the concrete layer C, the flexible pipe joint is easily damaged by rubbing against the inner surface of the concrete layer C on the way to the end. It is.

  As a material of the sheath 10 (20) in which the buried portion 5 (15) and the protruding portion 4 (14) can be separated as described above, the buried portion 5 (15) has a strength and Considering the smoothness in the pipe through which the flexible pipe joint is inserted, for example, a synthetic resin such as vinyl chloride resin or polyethylene resin is suitable, and the protrusion 4 (14) is also considered in consideration of reuse after separation. These synthetic resins are suitable, but in the case of disposable specifications, they may be made using paper such as cardboard.

  When the sheath pipe 10 (20) having the above-described form is embedded in the foundation concrete layer C to separate the protrusion 4 (14) and the flexible pipe joint is inserted, the drain pipe is piped. For waterproofing from the outdoor B, it was inserted into the inner peripheral surface and the inside at the position of the end portion on the outdoor B side of the horizontally disposed linear portion 1 (11) of the sheath 10 (20) after separation. The gap between the outer periphery of the flexible pipe joint is closed using, for example, a rubber annular sealing material, and a waterproof silicone resin sealing material is provided from the end surface of the rising straight portion 3 (13) on the lower floor side. Fill.

  Alternatively, a foamed polyethylene sheet is wound around the outer peripheral surface of the flexible pipe joint to fill the gap between the inner peripheral surface of the separated sheath tube 10 (20), and then the separated sheath tube 10 ( 20) Perform construction such as filling a waterproof silicone resin sealant or mortar from both ends.

  In this embodiment, as shown in FIG. 1 (b), the concrete is not projected from the outdoor B side, but may be projected.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to "sheath pipes" used for piping a flexible pipe joint of a water supply / drainage pipe in a foundation concrete layer under a floor of a building so as to be detachable.

(A) shows a single sheath tube of this embodiment, and (b) schematically shows a state in which the sheath tube of (a) is embedded and fixed in a concrete layer. In (a), the case where the attachment and detachment form of the projecting portion and the embedded portion is in a relationship of “insertion” and “reception”, which is the first embodiment, is shown in a sectional view, and (b), ) Is a perspective view of a single projecting portion, and FIG. 8C is a partial perspective view of the projecting portion facing side of the single embedded portion in FIG. (A) is a sectional view showing a case where the protrusion and detachment form of the embedding part is an adapter socket in the second embodiment, and (b) is a perspective view showing a single adapter socket. Is.

Explanation of symbols

1,11 Horizontal straight part (Horizontal arrangement straight part)
2, 12 Curved portion 3, 13 Standing straight portion 4, 14 Protruding portion 4a, 14a End surface of protruding portion 5, 15 Buried portion 6 Insertion port 7 Receiving port 8 Elongated hole (hook shape)
10, 20 sheath pipe 30 adapter socket 31 fitting part 32 stepped part C foundation concrete layer (concrete layer)
C ₁ (under the concrete layer) underfloor surface d ₁ , d ₂ separation position X ₁ , X ₂ (from the under floor surface) vertical distance

Claims (6)

In order to pipe the flexible pipe joints for water supply and drainage pipes in the foundation concrete layer under the floor of the building so that they can be inserted and removed, a part of the pipe is buried and fixed in the foundation concrete layer, and the linearly arranged straight part facing the outdoor side is connected to it. It consists of a rising straight part facing the floor under the curved part, and is a sheath pipe that allows the flexible pipe joint to be inserted inside,
A sheath pipe characterized in that an embedded portion embedded in a foundation concrete layer and a protruding portion that protrudes from at least the lower floor side of the lower floor side and the outdoor side surface are detachable. The sheath tube according to claim 1,
As a form in which the protruding part is detachable from the embedded part, the opposite side of the protruding part and the embedded part has a relationship between an insertion port and a receiving port that are fitted to each other. . The sheath tube according to claim 1,
A sheath tube characterized in that an adapter socket is interposed between the projecting portion and the embedded portion so as to be detachable. In the sheath tube according to any one of claims 1 to 3,
A sheath tube characterized in that a hook shape is provided on the protrusion so as to make it easy for an operator's hand or auxiliary tool to separate the protrusion from the embedded portion. The sheath tube according to any one of claims 1 to 4,
The sheath pipe characterized by the end surface of the protrusion part from the said floor lower side surface of a foundation concrete layer being parallel to the pipe axis of the horizontal arrangement | positioning linear part which faces the said outdoor side.   A supply / drainage pipe basic penetration kit comprising the sheath pipe according to any one of claims 1 to 5 and a flexible pipe joint inserted into the sheath pipe.

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