JP5535442B2 - Drainage equipment - Google Patents

Description

  The present invention relates to a drainage facility. More specifically, a drainage pipe joint that passes through a concrete slab separating the upper floor and the lower floor and is fixed to each floor, and a drainage stand piped between the upper floor drainage pipe joint and the lower floor drainage pipe joint. The present invention relates to a drainage facility including a pipe.

  Such a drainage facility is described in Patent Document 1. In the drainage facility according to Patent Document 1, the drainage pipe joint is fixed with backfill mortar or the like in a state where the trunk portion is passed through the through hole of the concrete slab. This drainage pipe joint has a receiving port at the upper part of the trunk part, and has a straight pipe part at a position suspended from the concrete slab at the lower part of the trunk part. The drainage stack is provided with a receiving port at the upper end, and the receiving port is inserted and connected to the straight pipe part where the drainage pipe joint on the upper floor is suspended, and the lower end is inserted and connected to the upper receiving port on the drainage pipe joint on the lower floor. It is connected between the drainage pipe joint on the upper floor and the drainage pipe joint on the lower floor.

JP 2006-22581 A

  Such a drainage facility is generally piped by assembling a drainage pipe joint and a drainage stack in order from the lower floor. In such a drainage facility, for example, even if the drainage standpipe on the way is clogged or damaged, the drainage pipe joints on the upper floor and the lower floor are both fixed to the concrete slab. It was difficult to remove only. In other words, it can be removed by cutting the drainage standpipe, but it is cut due to problems such as noise generation or the generation of scraps and chips due to the fact that cutting at the construction site is regulated or because it is a metal pipe In fact, it was sometimes difficult to remove the drainage stack. Even if the drainage stack is cut and removed, it is not easy to install an alternative drainage stack between the drainage stacks fixed on the upper and lower floors. It was difficult to update.

  Then, this invention made it the subject to be able to update the drainage standpipe piped between this drainage pipe joint, with the drainage pipe joint being fixed to the concrete slab of an upper floor and a lower floor.

The present invention takes the following means in order to solve the above problems.
The present invention provides a drainage pipe joint that is fixed to each floor through a concrete slab that partitions the upper floor and the lower floor, and a drainage stand piped between the upper floor drainage pipe joint and the lower floor drainage pipe joint. A drainage facility comprising a pipe, and a lower pipe disposed integrally with the concrete slab is integrally provided at a lower portion of the drainage pipe joint, and the drainage standpipe is an upper standpipe and A lower riser pipe, and the upper riser pipe and the lower riser pipe are connected via a first pipe connection mechanism so as to be able to be disconnected at a position that can be reached by an operator in a standing work state, The upper end of the upper riser is connected to the hanging pipe of the drainage pipe joint on the upper floor in a releasable manner via the second pipe connection mechanism, and the lower end of the lower riser is connected to the lower floor drainage pipe. By connecting to the upper part of the joint, the drainage pipe joint on the upper floor and the drainage pipe joint on the lower floor And at least one of the first pipe connection mechanism and the second pipe connection mechanism is configured as an exchangeable connection configuration, and the exchangeable connection configuration is A receiving port is provided at the end of one of the two pipes to be connected, and the receiving port and the end of the other tube are inserted and connected in a state where they can be inserted deeper, In the drainage system, the drainage standpipe can be removed by inserting the other pipe deeper into the receiving port in one pipe connection mechanism.

  In the drainage facility of the present invention, the drainage stack is composed of an upper stacker and a lower stacker connected via a first pipe connection mechanism. And the upper end part of this drainage standpipe is connected via the drooping pipe hanging from the drainage pipe joint of an upper floor via the 2nd pipe connection mechanism. Therefore, between the upper floor and the lower floor concrete slabs, as a pipe connection mechanism for connecting two pipes, the first pipe connection mechanism for connecting the upper and lower stacks, and the upper floor drainage There is provided a second pipe connection mechanism relating to the connection between the drooping pipe hanging from the pipe joint and the upper end of the upright pipe. Both the first pipe connection mechanism and the second pipe connection mechanism can be disconnected, and at least one of the pipe connection mechanisms is configured as an exchangeable connection configuration. In the present invention, “exchange” means that a receiving port is provided at the end of one of the two tubes to be connected, and the receiving port and the end of the other tube can be inserted deeper. It is configured to be inserted and connected, and the other tube is inserted deeper into the receptacle. According to the drainage system of the present invention, the concrete slabs of the upper floor and the lower floor are exchanged by one pipe connection mechanism having an exchangeable connection structure, that is, by inserting the other pipe deeper into the receiving port. It is possible to remove the drainage standpipe from the gap between the drainage pipe joints fixed to the pipe without cutting. Moreover, a drainage standpipe can be piped between the drainage pipe joints fixed to the concrete slabs on the upper floor and the lower floor in the reverse procedure.

As one embodiment of the present invention, the second pipe connection mechanism is configured as the exchangeable connection configuration, and the upper end portion of the upright pipe has a taper-shaped boundary widening upward. A receiving port having a section, and the insertion port and the drooping pipe of the drainage pipe joint on the upper floor are further inserted and connected in a state where they can be inserted deeply until they abut against the tapered boundary expanding portion, By releasing the connection of the first pipe connection mechanism and moving the upper stand pipe upward, the droop pipe of the drainage pipe joint on the upper floor is inserted deeper into the receptacle while the upper stand pipe and the lower pipe are inserted. The upper pipe is separated from the vertical pipe, and at least one of the upper pipe and the lower pipe is tilted by tilting at least one of the upper pipe and the lower pipe. Remove from the drainage pipe joint on the lower floor It is preferable that there is a possible and become configured.
In the above, the receiving port provided at the upper end of the upper riser is set as a receiving socket which is a component different from the upper standing tube, and the receiving socket is connected and fixed to the upper end of the upper rising tube. It is preferable that it is the structure which is.

  According to such a drainage facility, the second pipe connection mechanism relating to the connection between the drooping pipe hanging from the drainage pipe joint on the upper floor and the upper end of the upright pipe is configured as an exchangeable connection configuration. Is configured to separate the upper pipe and the lower pipe by releasing the connection of the first pipe connection mechanism provided at a position that can be reached in the standing work state, and to exchange the upper pipe independently. Yes. Since the upper tube is separated from the lower tube and handled independently, it is relatively short and lightweight, and it is easy to perform exchange work.

  As another embodiment of the present invention, the drainage pipe joint includes an upper body having an upper receiving port into which a lower end portion of the lower pipe is inserted and connected, and the drooping pipe, and is arranged through the concrete slab. The lower body is provided so as to be coaxially and releasably connected, and the first pipe connection mechanism is configured as the exchangeable connection structure, and the upper end portion of the lower pipe Is provided with a receiving port, and the receiving port and the lower end portion of the upper stand pipe are inserted and connected in a deeply insertable state, and the upper body and the lower body of the drainage pipe joint on the lower floor are connected. The upper body of the drainage pipe joint on the lower floor and the lower riser are moved upward together, and the receiving port at the upper end of the lower riser is inserted deeper into the lower end of the upper riser. While connecting the upper and lower bodies of the drainage pipe joint on the lower floor By while, it is preferable that the lower vertical tube is removable together with the body on the lower floor of the drainage pipe fittings.

  According to such a drainage facility, the first pipe connection mechanism provided at a position where the worker can reach in the standing work state is configured as an exchangeable connection configuration. You just need to exchange. Therefore, the worker can exchange work by standing work.

  Further, in the drainage facility of the other embodiment, the connection between the upper body and the lower body of the drainage pipe joint on the lower floor is released, and the upper body of the drainage pipe joint on the lower floor and the lower pipe are integrated. The upper body and the lower body of the drainage stack on the lower floor are separated from each other while inserting the receiving port of the upper end of the lower stack into the lower end of the upper stack further deeply. It is preferable that the receptacle can be pulled out from the lower end portion of the upper standpipe by tilting the standpipe. According to this drainage facility, the operator exchanges the downpipe pipe that is piped below the first pipe connection mechanism provided at a position that can be reached in the standing work state. Since the lower riser is handled separately from the upper riser, it is relatively short and lightweight, and it is easy to perform exchange work.

  Further, in the drainage facility of the other embodiment, the lower floor drainage pipe joint is disconnected from the upper body and the lower body and the second pipe connection mechanism is disconnected, and the lower floor drainage is released. While the lower body of the pipe joint and the lower riser are operated as a unit, the receptacle of the upper end of the lower riser is inserted deeper into the lower end of the upper riser, so that the drainage pipe joint of the lower floor is The upper body and the lower body are separated from each other, the lower pipe of the drainage pipe joint on the upper floor is separated from the upper end portion of the upper riser, and the upper floor pipe and the lower pipe are integrated to form the lower floor. It is also preferable to be removable together with the upper body of the drainage pipe joint. According to this drainage facility, the operator exchanges the first pipe connection mechanism provided at a position that can be reached in the standing work state to shorten the apparent length of the drainage stack, and the upper and lower stacks. Can be removed together.

  According to the present invention, it is possible to update the drainage standpipe piped between the drainage pipe joints while the drainage pipe joints are fixed to the concrete slabs on the upper floor and the lower floor.

[Embodiment 1]
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (A), the drainage facility 11 according to the present embodiment is mainly composed of drainage pipe joints 20 and 30 and a drainage stack 40. First, each member which comprises this drainage equipment 11 is demonstrated.

<About drain pipe joints 20 and 30>
The drainage pipe joints 20 and 30 are installed on each floor through a concrete slab CS that partitions each level of a building having a plurality of layers. In this embodiment, the drain pipe joint 20 is installed on the upper floor A, and the drain pipe joint 30 is installed on the lower floor B. Since the drainage pipe joints 20 and 30 are the same except for the installation level, the drainage pipe joints 20 installed on the upper floor A will be described in detail here. The drainage pipe joint 20 on the upper floor A joins the drainage flowing down the drainage stack 39 connected to the upper floor A and the drainage led by a side branch pipe (not shown) to join the drainage stack on the lower floor B. 40 is a joint to be introduced into 40. The drainage pipe joint 20 has a configuration in which the body part can be divided into upper and lower parts, and includes an upper body 24 and a lower body 26. Then, the lower flange 24b formed at the lower portion of the upper body 24 and the upper flange 26c formed at the upper portion of the lower body 26 are fastened by bolts and nuts 23 through packing (not shown), so that The body 24 and the lower body 26 are coaxially connected in a watertight state.
In the drain pipe joint 20, the rock wool G is filled in the through hole CH in a state where the lower body 26 is passed through the through hole CH of the concrete slab CS, and a mortar Mr of, for example, about 3 cm is filled in the upper part of the through hole CH. By being backfilled, the concrete slab CS is fixed. A plurality of horizontal branch pipe receiving ports 26 a to which the horizontal branch pipes are connected are provided at positions projecting from the upper surface of the concrete slab CS above the lower body 26. A substantially upper half of a portion of the lower body 26 buried in the concrete slab CS has a cylindrical shape, and a substantially lower half is formed as a tapered portion 26b having a tapered shape gradually narrowed downward. A straight tubular portion 28 extends from the lower end of the tapered portion 26b. This straight tubular portion 28 is referred to as a drooping tube in the present invention. The drooping pipe 28 is arranged so as to hang down from the concrete slab CS, and its lower end is connected to the upper end of the drainage stack 40 via a second pipe connecting mechanism 60 described later.
An upper receiving port 24 a into which the lower end portion of the drainage stack 39 is inserted and connected is provided on the upper body 24 of the drainage pipe joint 20. A seal member having a receiving portion that directly supports the lower end surface of the drainage stack 39 is mounted inside the upper receiving port 24a, and the lower end surface of the drainage stack 39 contacts the receiving portion of the sealant. It is inserted until it touches. In the drainage facility 11, the upper body 24 is supported on the concrete slab CS by the joint support fitting 70.

  The joint support fitting 70 for supporting the upper body 24 of the drain pipe joint 20 includes a base member 74 fixed to the concrete slab CS and a support column 72 erected on the base member 74 as a through hole CH of the concrete slab CS. A band member 76 is provided, which is provided in pairs with being sandwiched between and attached to the pair of struts 72. The band member 76 is a pair of band-shaped members that can sandwich the upper body 24 at a portion formed in a semicircular arc shape. The upper body 24 is supported by the concrete slab CS via the joint support fitting 70.

<About the drainage stack 40>
The drainage stack 40 includes an upper stack 42 and a lower stack 44. The upright pipe 42 is made of a drained PVC-lined steel pipe (DVLP), and an upper socket 64 is provided by connecting a socket socket 46 to the upper end of the pipe. The upper receiving port 64 corresponds to the receiving port in the present invention. The lower pipe 44 is made of a drained PVC-lined steel pipe (DVLP). The upper pipe 42 and the lower pipe 44 are connected in series via a drainage steel pipe flexible joint 52 so that the connection can be released. The connection mechanism 50 between the upper pipe 42 and the lower pipe 44 corresponds to the first pipe connection mechanism 50.
An upper receiving port 64 provided at the upper end of the upright pipe 42 is inserted and connected to the lower end of the drooping pipe 28 that hangs down from the upper floor A. The pipe connection mechanism 60 between the upright pipe 42 and the drooping pipe 28 corresponds to a second pipe connection mechanism. On the other hand, the lower end portion of the lower pipe 44 is inserted and connected to the upper receiving port 34a of the upper body 34 of the drainage pipe joint 30 installed on the lower floor B. Accordingly, the drainage stack 40 is piped between the drainage pipe joint 20 on the upper floor A and the drainage pipe joint 30 on the lower floor B.
In the present embodiment, the standpipe length L1 of the upper standpipe 42 is 1151 mm, the standpipe length L2 of the lower standpipe 44 is 880 mm, and the effective length of the flexible joint 52 for the drainage steel pipe (from the lower end of the upper standpipe 42 to the lower standpipe 44 Ld) is 39 mm, and the total length L of the drainage stack 100 is 2070 mm. The effective length of the receptacle socket 46 (the length from the lower end of the drooping pipe 28 to the upper end of the upper stand pipe 42) U is 100 mm, and the effective length of the drain pipe joint 80 (from the lower end of the drain stand pipe 39 to the drain stand pipe 40 The length to the upper end) J is 750 mm.

<About the first pipe connection mechanism 50>
The first pipe connection mechanism 50 is configured to connect the lower end of the upper riser 42 and the upper end of the lower riser 44 via a flexible joint 52 for a drainage steel pipe. The first pipe connection mechanism 50 connects the upper riser pipe 42 and the lower riser pipe 44 so that the connection can be released at a position where the worker can reach in the standing work state. In this embodiment, the flexible joint 52 for drainage steel pipes is provided at a position where the height h is 1200 mm from the upper surface of the concrete slab CS. In the present embodiment, the floor height H is 3000 mm, and the first pipe connection mechanism 50 is provided at a substantially intermediate height position.

The drainage steel pipe flexible joint 52 includes an upper connection part 54a and a lower connection part 54b that can connect the straight tubular end of the vertical pipe to the upper and lower ends of the cylindrical main body 54 by so-called mechanical connection. In addition, a lower end portion of the upper riser pipe 42 is connected to the upper connection portion 54a, and an upper end portion of the lower riser tube 44 is connected to the lower connection portion 54b. Since the upper connection portion 54a and the lower connection portion 54b are provided symmetrically in the vertical direction and have the same basic configuration, the upper connection portion 54a will be described in detail here. As shown in FIG. 3A, the upper connection portion 54a includes an upper receiving port portion 56a extending at the upper end of the cylindrical main body 54, and a flange member formed separately from the upper receiving port portion 56a. 58a and an annular packing 58b having a substantially trapezoidal cross section. The upper receiving port portion 56a is formed so that a straight tubular lower end portion of the upright tube 42 can be inserted therein, and is provided with a flange portion 56b projecting outward in the horizontal direction at the upper end. In a state where the lower end portion of the upright pipe 42 is inserted into the upper receiving portion 56a and the annular packing 58b is disposed between the flange portion 56b and the flange member 58a, the flange member 58a is connected to the flange portion 56b with a bolt / nut 58c. It is concluded. By fastening the bolts and nuts 58c, the flange portion 56b and the flange member 58a come close to each other, the annular packing 58b is pressed, and is compressed and deformed so as to be in close contact with the outer peripheral surfaces of the flange portion 56b, the flange member 58a and the upright tube 42. . Thereby, the lower end part of the upright pipe 42 and the flexible joint 52 for drainage steel pipes are watertightly connected. On the other hand, the upper end portion of the lower pipe 44 and the flexible joint 52 for the drainage steel pipe are water-tightly connected by the lower connection portion 54b, and the upper pipe 42 and the lower pipe 44 are connected in series in a state where the connection can be released. (See FIG. 1A).
In the normal connection state of the first pipe connection mechanism 50, the lower end portion of the upright pipe 42 is inserted into the upper receiving portion 56a by a squeezing depth D1 of the upper receiving portion 56a (see FIG. 3A). The connection is maintained with no further insertion possible. When the upper stand pipe 42 is swept and moved relatively upward by a depth D1, the upper stand pipe 42 can be pulled out from the upper receiving port portion 56a, and further moved further upward to move the hook portion 56b and the lower end of the upper stand pipe 42 from each other. A gap (hole) K can be provided between the two.

<About the second pipe connection mechanism 60>
As shown in FIG. 1 (A), the second pipe connection mechanism 60 is a straight tubular drooping pipe that hangs down from the upper floor A to the upper receiving port 64 of the receiving socket 46 provided at the upper end of the upright tube 42. It is configured as an insertion connection form in which 28 is inserted and connected, and is configured to allow exchange.

  The receptacle socket 46 is made of cast iron and has a substantially cylindrical upper receptacle 64 into which the hanging pipe 28 of the drainage pipe joint 20 on the upper floor A can be inserted from the upper part of the receptacle socket 46 as shown in FIG. At the lower portion, a mechanical connection portion 68 connected to the upper end portion of the upright pipe 42 by so-called mechanical connection is provided. And the taper-like boundary expansion part 67 which expands diameter upwards is formed between the upper receiving port 64 and the mechanical connection part 68. As shown in FIG. The mechanical connection portion 68 includes a lower receiving port portion 68a extending below the boundary widening portion 67, a flange member 69a formed separately from the lower receiving port portion 68a, and an annular packing 69b having a substantially trapezoidal cross section. I have. The lower receiving portion 68a is formed so that a straight tubular upper end portion of the upright tube 42 can be inserted, and a lower end 68b is provided with a flange portion 68b that projects horizontally outward. With the upper end of the upright pipe 42 inserted into the lower receiving portion 68a and the annular packing 69b disposed between the flange 68b and the flange member 69a, the flange member 69a is connected to the flange 68b with a bolt / nut 69c. It is concluded. By fastening the bolts and nuts 69c, the flange portion 68b and the flange member 69a come close to each other, the annular packing 69b is pressed, and is compressed and deformed so as to be in close contact with the outer peripheral surfaces of the flange portion 68b, the flange member 69a and the upright tube 42. . As a result, the socket 46 is connected to the upper end of the upright tube 42 in a watertight manner, and the upper end of the upper stand 42 is provided with a receiving port (upper receiving port 64).

  The upper receiving port 64 has a straight pipe portion 64 a and a packing mounting portion 65 that protrudes inward near the opening of the upper receiving port 64. A groove 65m having a substantially rectangular cross section is formed in the packing mounting portion 65, and an O-ring packing 66, which is an annular packing having a circular cross section, is fitted therein. When the drooping tube 28 is inserted into the upper receiving port 64, the O-ring packing 66 held in the groove 65 m of the upper receiving port 64 contacts the outer peripheral surface of the dripping tube 28, so that the drooping tube 28 and the upper receiving port 64 are watertight. Is inserted and connected. The length d from the upper end of the upper receiving port 64 to the center line of the opening of the groove 65m in which the O-ring packing 66 is fitted is set to 10 mm, and the upper receiving port 64 and the drooping tube 28 are securely connected in a watertight state. The necessary insertion depth N, which is the minimum insertion dimension necessary for this, is set to 25 mm. Therefore, as shown by a two-dot chain line as a reference numeral 28x in FIG. 2, the connection can be maintained if the drooping tube 28 is inserted into the upper receiving port 64 at least by the stagnation depth N (25 mm). The O-ring packing 66 is in contact with the outer peripheral surface of the drooping tube 28 at a position protruding inward from the inner peripheral surface of the straight pipe portion 64a, and between the inner peripheral surface of the straight pipe portion 64a and the outer peripheral surface of the drooping tube 28. A gap F is generated. The straight pipe portion 64a has an inner diameter φ of 130 mm, and the gap F is set to 8 mm.

As shown by a two-dot chain line as a reference numeral 28z in FIG. 2, the upper receiving port 64 can be inserted into the drooping tube 28 until the lower end of the drooping tube 28 hits the boundary widening portion 67. The Nmax depth is deeper than the necessary penetration depth N (25 mm). However, in the normal connection state of the first pipe connection mechanism 50, the watertight connection is maintained in a state in which the lower end of the drooping pipe 28 is inserted so as not to hit the boundary expanding portion 67. In other words, the connection is maintained in a state where there is room for the lower end portion of the drooping tube 28 to be inserted deeper into the upper receiving port 64. Assuming that the dimension inserted into the upper receptacle 64 of the drooping tube 28 is the insertion dimension S1, the connection state is maintained in the normal connection state with the insertion allowance dimension E remaining. That is, in this normal connection state, (squeezable dimension Nmax> insertion dimension S1 ≧ required squeeze depth N), and the insertion margin dimension E, which is the difference between the squeezable dimension Nmax and the insertion dimension S1. Therefore, the connection is maintained in such a state that the upper receiving port 64 and the lower end portion of the drooping tube 28 can be inserted deeper. In other words, the connection is maintained in a state in which the upper stand pipe 42 can be relatively displaced upward by the insertion margin dimension E while the upper receiving port 64 is inserted into the hanging pipe 28.
At the time of construction of the drainage facility 11, regulation means for restricting the drooping pipe 28 from being inserted deeper into the upper receiving port 64 and positioning the relative position of the drooping tube 28 with respect to the upper receiving port 64 is provided. An example of the restricting means is a restricting band 140 (see FIG. 1A). Another example of the restricting means is a restricting jig 160 (see FIG. 2).

  As shown in FIG. 11, the regulation band 140 has a pair of band portions 142 that can sandwich the drooping tube 28 (see FIG. 1A) between opposing semicircular arc-shaped portions, and the pair of bands One end of the portion 142 is connected by a hinge structure 144, and the other end is fastened by a bolt / nut 146. A vibration isolating rubber 148 is disposed on the inner surface of the band portion 142. The regulation band 140 can clamp the drooping pipe 88 strongly by the band 142 by sandwiching the drooping pipe 88 by the band 142 and fastening the bolts and nuts 146. It is fixed to. When the lower end of the restriction band 140 hits the upper end surface of the upper receiving port 64, insertion of the drooping pipe 88 into the upper receiving port 64 is restricted. If the fastening of the bolt and nut 146 is released, the restriction of insertion of the drooping pipe 88 into the upper receiving port 64 by the restriction band 140 is released.

  As shown in FIG. 2, the restriction jig 160 has a shape in which cylinders having different diameters are coaxially stacked. The relatively large-diameter cylindrical portion constitutes the receiving port outer fitting portion 162, and the relatively small-diameter cylindrical portion constitutes the insertion restricting portion 164, and the receiving mouth outer fitting portion 162 and the insertion restricting portion 164 are stepped. Connection is formed through the shape portion 166. The outer fitting portion 162 of the receptacle is fitted to the outside of the upper receptacle 64 of the upper stand pipe 42, and the step-shaped portion 166 is in contact with the upper end of the upper receptacle 64. Thereby, the restriction jig 160 is positioned with respect to the upper receiving port 64. The insertion restricting portion 164 is in a state where the drooping tube 28 is inserted, and an upper end thereof is in contact with a restricting rod 28 a provided along the outer peripheral direction of the drooping tube 28. Thereby, at the time of construction, the drooping tube 28 is prevented from being inserted deeper into the upper receiving port 64, and the relative position of the hanging tube 28 with respect to the upper receiving port 64 is positioned. The restriction jig 160 is an aluminum alloy casting, and as shown in FIG. 12, two structural members 161a and 161b having a semicircular radial cross-sectional shape are brought into contact with each other, and both ends of the semicircular shape are detachable mounting bolts 161c. It is concluded with. The restriction jig 160 can be detached from the drainage facility 11 by releasing the fastening of the attaching / detaching assembly bolt 161 c to separate the two constituent members 161 a and 161 b into two in the radial direction.

<Setting of insertion margin dimension E>
The insertion margin dimension E according to the first pipe connection mechanism 50 is set to a dimension that allows the upper pipe 42 to be exchanged and removed. That is, if the connection with the lower pipe 44 by the first pipe connection mechanism 50 is released and the upper pipe 42 is moved upward by moving the upper pipe 42 upward, the vertical pipe 28 is separated. An insertion margin dimension E is set so that the upper receiving port 64 of the upright pipe 42 can be pulled out from the upper side. In this embodiment, the insertion margin dimension E is set so that the upper standpipe 42 can be pulled out by tilting the upper standpipe 42 and moving it obliquely downward. When the connection of the upper connection part 54a related to the first pipe connection mechanism 50 is released and the upper stand pipe 42 is relatively moved upward by the stagnation depth D1 (see FIG. 3A) of the upper receiving port part 56a, The upright tube 42 can be pulled out from the upper receiving port portion 56a, and a gap (opening margin) K can be provided between the flange portion 56b and the lower end of the upright tube 42 by further moving upward. Assuming that the minimum value of the clearance allowance K that allows the upper stand tube 42 to move obliquely downward is the minimum clearance allowance K1, the insertion clearance dimension E ≧ the penetration depth D1 + the minimum clearance allowance K1.
In this embodiment, the squeezable dimension Nmax of the upper receptacle 64 is 140 mm, the drooping tube 28 is inserted into the upper receptacle 64 by the insertion dimension S1 = 40 mm, and the insertion margin dimension E is 100 mm. . On the other hand, the penetration depth D1 = 33 mm, the minimum penetration K1 = 10 mm, and (the penetration depth D1 + minimum penetration margin K1) = 43 mm. Therefore, if the upper pipe 42 is moved upward by at least 43 mm. It is possible to move it diagonally downward and pull it out.

<How to update the drainage stack 40>
Next, a method for updating the drainage stack 40 will be described with reference to FIGS. 1 (A) and 1 (B).
First, (1) restricting means (a restricting band 140 or a restricting jig 160) for restricting the drooping tube 28 from being inserted deeper into the upper receiving port 64 and positioning the relative position of the depending tube 28 with respect to the upper receiving port 64. ) Is removed. (2) The bolts and nuts 58c of the drainage steel pipe flexible joint 52 according to the first pipe connection mechanism 50 are released to release the connection between the upright pipe 42 and the drainage steel pipe flexible joint 52. The order of (1) and (2) is not particularly limited. Next, (3) the upright pipe 42 is exchanged. That is, the upright pipe 42 is moved upward. Thereby, the lower end portion of the upper standing pipe 42 and the flexible joint 52 for the drainage steel pipe can be separated while the upper receiving port 64 of the upper standing pipe 42 is inserted deeply into the hanging pipe 28. At this time, the upright tube 42 is moved upward so that the clearance K of the upper wall 42 is at least the minimum clearance K1 = 10 mm. Next, (4) the lower end of the upright tube 42 is tilted until it can be pulled out. Since the gap F (8 mm) is provided between the inner peripheral surface of the upper receiving port 64 and the outer peripheral surface of the drooping tube 28, the upright tube 42 can be easily tilted with respect to the drooping tube 28. At the same time, if the upper end of the lower tube 44 is tilted away from the upper tube 42, the upper tube 42 can be pulled out even if the tilt angle of the upper tube 42 is relatively small. For example, when the tilt angle θ1 with respect to the upright state of the upright tube 42 is 5 degrees and the tilt angle θ2 with respect to the upright state of the lower tube 44 is 5 degrees, the upright tube 42 can be pulled out. Next, (5) the upright pipe 42 is moved obliquely downward, and the upper receiving port 64 is pulled out from the hanging pipe 28. In the cases (3) and (5), when the friction between the O-ring packing 66 and the drooping pipe 28 is large and it is difficult to move the upper stand pipe 42 up and down, the upper stand pipe 42 is swung left and right while moving up and down. It is good to move. Since there is a gap F (8 mm) between the inner peripheral surface of the upper receiving port 64 and the outer peripheral surface of the drooping tube 28, an operation of swinging left and right is allowed. Next, (6) the lower pipe 44 having the drainage steel pipe flexible joint 52 at the upper end is moved upward and inserted into the upper receiving port 34a of the upper body 34 of the drainage pipe joint 30 on the lower floor B through the sealing material. The lower end part of the connected lower pipe 44 is pulled out. Thereby, the lower pipe 44 is removed.
An alternative drainage stack 40 can be piped in the reverse procedure.

According to the drainage equipment 11 having the above configuration, the following operational effects can be obtained.
The second pipe connection mechanism 60 is configured to be able to exchange, and the connection of the first pipe connection mechanism 50 provided at a position that can be reached by the worker in a standing work state is released, and the upper pipe 42 is exchanged. It is supposed to be configured. Since the upper riser 42 is separated from the lower riser 44 and the upper riser 42 is handled alone, the upper riser 42 is relatively light and easy to exchange.

  In this embodiment, instead of the drainage steel pipe flexible joint 52 constituting the first pipe connection mechanism 50, for example, sockets with a cleaning port may be used at a ratio of the first floor to the fourth floor. As shown in FIG. 3 (B), the socket with a cleaning port includes a cleaning port 182 with a lid 184 on the side surface of a cylindrical main body 180. Tubular ends can be connected.

[Embodiment 2]
Embodiment 2 of the present invention will be described with reference to FIGS. As shown in FIG. 4, the drainage facility 12 according to the present embodiment is mainly composed of drainage pipe joints 80 and 90 and a drainage stack 100. First, each member which comprises this drainage equipment 12 is demonstrated.

<Drainage pipe joints 80 and 90>
The drainage pipe joints 80 and 90 are installed on each floor through a concrete slab CS that partitions each level of a building having a plurality of layers. In this embodiment, the drain pipe joint 80 is installed on the upper floor A, and the drain pipe joint 90 is installed on the lower floor B. Since the drainage pipe joints 80 and 90 are the same except that the installed levels are different, the drainage pipe joints 80 installed on the upper floor A will be described in detail here. The drainage pipe joint 80 on the upper floor A joins the drainage flowing down the drainage standpipe 99 piped to the upper floor A and the drainage led by the side branch pipe (not shown) to join the drainage standpipe on the lower floor B. 100 is a joint that flows into 100. The drainage pipe joint 80 has a configuration in which the body portion can be divided into upper and lower parts, and includes an upper body 84 and a lower body 86. Then, the lower flange 84b formed at the lower portion of the upper body 84 and the upper flange 86c formed at the upper portion of the lower body 86 are fastened by bolts and nuts 83 through packing (not shown), thereby The body 84 and the lower body 86 are coaxially connected in a watertight state.
In the drain pipe joint 80, the rock wool G is filled in the through hole CH in a state where the lower body 86 is passed through the through hole CH of the concrete slab CS, and the mortar Mr of, for example, about 3 cm is filled in the upper portion of the through hole CH. By being backfilled, the concrete slab CS is fixed. A plurality of horizontal branch pipe receiving ports 86a to which the horizontal branch pipes are connected are provided at positions protruding from the upper surface of the concrete slab CS above the lower body 86. The substantially upper half of the portion of the lower body 86 that is back-filled in the concrete slab CS has a cylindrical shape, and the substantially lower half is formed as a tapered portion 86b having a tapered shape that gently narrows downward. A straight tubular portion 88 is extended at the lower end of the tapered portion 86b. This straight tubular portion is referred to as a drooping tube in the present invention. The drooping pipe 88 is hung from the concrete slab CS, and its lower end is connected to the upper end portion of the drainage stack 100 via a second pipe connecting mechanism 120 described later.
An upper receiving port 84 a into which the lower end of the drainage stack 99 is inserted and connected is provided at the upper part of the upper body 84 of the drainage pipe joint 80. Inside the upper receiving port 84a, a sealing material having a substantially cylindrical shape and having a receiving portion that directly supports the lower end surface of the drainage stack 99 is mounted, and the lower end surface of the drainage stack 99 contacts the receiving portion of the sealing material. It is inserted until it touches. In the drainage facility 12, the upper body 84 is supported on the concrete slab CS by the joint support fitting 70.

  The joint support fitting 70 that supports the upper body 84 of the drainage pipe joint 80 includes a base member 74 fixed to the concrete slab CS and a support column 72 erected on the base member 74 as a through hole CH of the concrete slab CS. A band member 76 is provided, which is provided in pairs with being sandwiched between and attached to the pair of struts 72. The band member 76 is a pair of band-shaped members that can sandwich the upper body 84 at a portion formed in a semicircular arc shape. The upper body 84 is supported by the concrete slab CS via the joint support fitting 70.

<About the drainage stack 100>
The drainage stack 100 includes an upper stacking tube 102 and a lower stacking tube 104. The upright pipe 102 is made of a drained PVC-lined steel pipe (DVLP). The lower riser 104 is made of drained PVC-lined steel pipe (DVLP), and an upper socket 114 is provided by connecting a socket socket 106 to the upper end of the pipe. This upper receptacle 114 corresponds to the receptacle in the present invention.
The upper riser tube 102 and the lower riser tube 104 are connected in series by inserting and connecting the lower end portion of the upper riser tube 102 to the upper receptacle 114 provided at the upper end portion of the lower riser tube 104. The connection mechanism 110 between the upper riser tube 102 and the lower riser tube 104 corresponds to the first pipe connection mechanism of the present invention.
The upper end portion of the upright pipe 102 is connected to the lower end portion of the drooping pipe 88 of the drainage pipe joint 80 depending from the upper floor A by the second pipe connecting mechanism 120 so as to be disconnected. The lower end portion of the lower riser 104 is inserted and connected to the upper receiving port 94a of the upper body 94. Thus, the drainage stack 100 is piped between the drainage pipe joint 80 on the upper floor A and the drainage pipe joint 90 on the lower floor B.
In the present embodiment, the upright pipe length L1 of the upright pipe 102 is 1250 mm, the upright pipe length L2 of the lower upright pipe 104 is 900 mm, and the effective length of the socket socket 106 (from the lower end of the upright pipe 102 to the upper end of the lower upright pipe 104) U) is 100 mm, and the total length L of the drainage stack 100 is 2250 mm. The effective length (the length from the lower end of the drainage stack 99 to the upper end of the drainage stack 100) J of the drainage pipe joint 80 is 750 mm.

  In the drainage facility 12, the upper stand pipe 102 is supported by the stand pipe support fitting 130 suspended from the concrete slab CS. The standpipe support fitting 130 includes a pair of leg members 132 suspended from the lower surface of the concrete slab CS with the through-hole CH interposed therebetween, and is attached to the ends of the pair of leg members 132. A band member 134 is provided. The band member 134 is a pair of band-like members that can sandwich the upper stand tube 102 at portions formed in opposing semicircular arc-shaped portions. The upper riser 102 is sandwiched between the band members 134 and is supported by the concrete slab CS via the riser support fitting 130.

<About the first pipe connection mechanism 110>
The first pipe connection mechanism 110 is configured as an insertion connection configuration in which a straight tubular lower end portion of the upper riser tube 102 is inserted and connected to an upper receptacle 114 of a receptacle socket 106 provided at an upper end portion of the lower riser tube 104. It is configured as an exchangeable connection configuration. The first pipe connection mechanism 110 connects the upper riser pipe 102 and the lower riser pipe 104 so that the connection can be released at a position where the worker can reach in the standing work state. In the present embodiment, the receiving socket 106 is provided at a position where the height h = 1220 mm from the upper surface of the concrete slab CS. In the present embodiment, the floor height H is 3000 mm, and the first pipe connection mechanism 110 is provided at a substantially intermediate height position.

  The receptacle socket 106 is made of cast iron, and has a substantially cylindrical upper receptacle 114 into which the lower end of the upright tube 102 can be inserted from the upper portion of the receptacle socket 106 as shown in FIG. It has the mechanical connection part 118 connected with the upper end part of the lower riser pipe 104 by what is called mechanical connection. In addition, a tapered boundary widening portion 117 is formed between the upper receiving port 114 and the mechanical connection portion 118 so as to increase in diameter upward. The mechanical connection part 118 includes a lower receiving part 118a extending under the boundary widening part 117, a flange member 119a formed separately from the lower receiving part 118a, and an annular packing 119b having a substantially trapezoidal cross section. I have. The lower receiving portion 118a is formed so that a straight tubular upper end portion of the lower riser tube 104 can be inserted, and a lower end thereof is provided with a flange portion 118b projecting outwardly horizontally. With the upper end portion of the lower pipe 104 inserted into the lower receiving port portion 118a and the annular packing 119b disposed between the flange portion 118b and the flange member 119a, the flange member 119a is attached to the flange portion 118b with the bolt and nut 119c. It is concluded. By fastening bolts and nuts 119c, the flange portion 118b and the flange member 119a come close to each other, the annular packing 119b is pressed, and is compressed and deformed so as to be in close contact with the outer peripheral surfaces of the flange portion 118b, the flange member 119a, and the lower pipe 104. . Accordingly, the socket socket 106 is water-tightly connected to the upper end portion of the lower pipe 104, and a receiving port (upper receiving port 114) is provided at the upper end portion of the lower pipe 104.

  The upper receptacle 114 of the receptacle socket 106 includes a straight pipe portion 114 a and a packing attachment portion 115 that protrudes inward near the opening of the upper receptacle 114. A groove 115m having a substantially rectangular cross section is formed in the packing mounting portion 115, and an O-ring packing 116 which is an annular packing having a circular cross section is fitted therein. When the lower end portion of the upright tube 102 is inserted into the upper receiving port 114, the O-ring packing 116 held in the groove 115 m of the upper receiving port 114 comes into contact with the outer peripheral surface of the upright tube 102, thereby The upper receiving port 114 is inserted and connected in a watertight state. The length d from the upper end of the upper receiving port 114 to the center line of the opening of the groove 115m into which the O-ring packing 116 is fitted is set to 10 mm, so that the upper receiving port 114 and the upright pipe 102 are securely in a watertight state. The necessary insertion depth N, which is the minimum insertion dimension required for connection, is set to 25 mm. In other words, as shown by a two-dot chain line as 102x in FIG. 5, the connection can be maintained if the upright tube 102 is inserted into the upper receiving port 114 at least by the necessary penetration depth N (25 mm). The O-ring packing 116 is in contact with the outer peripheral surface of the upright pipe 102 at a position projecting inward from the inner peripheral surface of the straight pipe portion 114 a, and the inner peripheral surface of the straight pipe portion 114 a and the outer peripheral surface of the upper pipe 102 are A gap F is generated between them. The straight pipe portion 114a has an inner diameter φ of 130 mm, and the gap F is set to 8 mm.

As shown by a two-dot chain line as a reference numeral 102z in FIG. 5, the upper receiving port 114 can be inserted until the lower end of the upright tube 102 hits the boundary expanding portion 117, The possible dimension Nmax is deeper than the necessary penetration depth N (25 mm). However, in the normal connection state of the first pipe connection mechanism 110, the watertight connection is maintained in a state where the lower end of the upright pipe 102 is inserted so as not to hit the boundary widening portion 117. In other words, the connection is maintained in a state where there is room for the lower end portion of the upright tube 102 to be inserted deeper into the upper receiving port 114. Assuming that the dimension inserted into the upper receptacle 114 of the upright tube 102 is the insertion dimension S2, the lower end of the upper stand tube 102 is further inserted in the normal connection state in which only the insertion dimension S2 is inserted into the upper receptacle 114. The connection state is maintained in a state where the possible insertion margin dimension E is left. That is, in this normal connection state, (squeezable dimension Nmax> insertion dimension S2 ≧ required squeezing depth N) is satisfied, and the insertion margin dimension E, which is the difference between the squeezable dimension Nmax and the insertion dimension S2. Therefore, the connection is maintained in such a state that the upper receiving port 114 and the lower end portion of the upright tube 102 can be inserted deeper. In other words, the connection is maintained in a state in which the lower receiving pipe 104 can be relatively displaced upward by an insertion margin dimension E while the upper receiving port 114 is inserted into the upper rising pipe 102.
In order to restrict the upper riser tube 102 from being inserted deeper into the upper receptacle 114 and to position the relative position of the upper riser tube 102 with respect to the upper receptacle 114, a regulation band 140 described later is attached to the upper riser tube 102. It has been.

  As shown in FIG. 11, the regulation band 140 has a pair of band portions 142 that can sandwich the upright tube 102 (see FIG. 4) between opposing semicircular arc-shaped portions, and the pair of band portions 142. One end of each is connected by a hinge structure 144, and the other end is fastened by a bolt and nut 146. A vibration isolating rubber 148 is disposed on the inner surface of the band portion 142. The regulation band 140 can clamp the upper stand tube 102 strongly by the band portion 142 by sandwiching the upper stand tube 102 with the band portion 142 and fastening the bolts and nuts 146. It is fixed to the outer periphery of 102. When the lower end of the restriction band 140 hits the upper end surface of the upper receiving port 114, insertion of the upright tube 102 into the upper receiving port 114 is restricted. If the fastening of the bolts and nuts 146 is released, the restriction on the insertion of the upright pipe 102 into the upper receptacle 114 by the restriction band 140 is released.

<Setting of insertion margin dimension E>
The insertion margin dimension E according to the first pipe connection mechanism 110 of the present embodiment is set to a dimension that allows the lower pipe 104 to be exchanged with the upper body 94 and removed. That is, the connection between the upper body 94 and the lower body 96 of the drainage pipe joint 90 on the lower floor B is released, and the upper body 94 and the lower pipe 104 inserted and connected to the upper receiving port 94a of the upper body 94 are integrated. When the upper body 94 is moved away from the lower body 96 by moving upward, the lower pipe 104 is tilted and moved obliquely downward to pull out the upper receptacle 114 of the lower pipe 104 from the upper pipe 102. An insertion margin dimension E is set so that the lower riser 104 can be removed together with the upper body 94. When the upper body 94 and the lower riser 104 are lifted together, a gap U (see FIG. 7) is formed between the lower flange 94b at the lower end of the upper body 94 and the upper flange 96c at the upper end of the lower body 96 by the distance moved upward. (See (A)) can be provided. When the minimum value of the clearance U between the lower flange 94b and the upper flange 96c that can be pulled out by moving the lower riser pipe 104 and the upper body 94 obliquely downward is defined as the minimum lifting allowance U1, (insertion margin dimension E ≧ The minimum lifting allowance is U1).
In the present embodiment, the squeezable dimension Nmax of the upper receptacle 114 is 140 mm, the upper stand tube 102 is inserted into the upper receptacle 114 by the insertion dimension S2 = 70 mm, and the insertion margin dimension E is 70 mm. Yes. On the other hand, since the minimum lifting allowance U1 = 20 mm, if the lower riser tube 104 and the upper body 94 are lifted together by at least 20 mm, they can be moved obliquely downward and pulled out.

<About the second pipe connection mechanism 120>
The second pipe connection mechanism 120 includes a lower end portion of the droop pipe 88 of the drain pipe joint 80 provided on the upper floor A and an upper end portion of the drainage stack 100 provided on the lower floor B (the upper end portion of the upper stand pipe 102). As shown in FIG. 6, the second pipe connection mechanism 120 has a lower end portion of the drooping pipe 88. As shown in FIG. And a flange member 89a formed separately from the drooping pipe 88, and a lower receiving portion 88a formed integrally with the lower receiving portion 88a and a flange 88b projecting outwardly formed at the lower end of the lower receiving portion 88a. The upper end portion of the straight pipe 102 is inserted into the lower receiving portion 88a, and the annular packing 89b is disposed between the flange portion 88b and the flange member 89a. State , The flange member 89a is fastened to the flange portion 88b by bolts and nuts 89c.
When the flange portion 88b and the flange member 89a are close to each other, the annular packing 89b is pressed and compressed and deformed, and is brought into close contact with the outer peripheral surfaces of the flange portion 88b, the flange member 89a and the upright tube 102, and the suspended tube 88 and the upright tube The tube 102 is watertightly connected.

<How to update the drainage stack 100>
Next, a method for updating the drainage stack 100 will be described with reference to FIGS.
As shown in FIG. 7A, (1) the band member 76 of the joint support fitting 70 that supports the upper body 94 of the drainage pipe joint 90 fixed to the lower floor B is removed from the column 72, and the upper body 94 is removed. The support by the joint support fitting 70 is released. (2) The bolts and nuts 93 that fasten the lower flange 94b of the upper body 94 and the upper flange 96c of the lower body 96 are removed, and the connection between the upper body 94 and the lower body 96 is released. (3) The restriction band 140 that restricts the upper riser tube 102 from being inserted deeper than a predetermined depth into the upper receiving port 114 is removed from the upper riser tube 102. (4) Remove the band member 134 of the riser support fitting 130 that supports the upper riser tube 102 from the leg member 132, and release the support by the riser support fitting 130 to the upper riser tube 102. (5) The bolts and nuts 89c relating to the second pipe connection mechanism 120 that connects the hanging pipe 88 hanging from the upper floor A and the upper end of the upstanding pipe 102 are loosened, and the hanging pipe 88 and the upright pipe 102 are It is not completely separated but is connected with play. In this state, the receptacle socket 106 constituting the upper receptacle 114 of the lower riser tube 104 is grasped, the riser tube 100 is shaken, and the adhesion portion of the O-ring packing 116 (see FIG. 5) is peeled off. The order of (1) to (5) above is not particularly limited. Next, (6) the lower pipe 104 and the upper body 94 are exchanged together. That is, the lower pipe 104 and the upper body 94 are moved upward together. Accordingly, the upper body 94 and the lower body 96 can be separated while the upper receiving port 114 of the lower tube 104 is inserted deeply into the upper tube 102. At this time, the lower pipe 104 and the upper body 94 are moved upward so that the lifting amount U of the upper body 94 is at least the minimum lifting amount U1 = 20 mm. Next, as shown in FIG. 7B, (7) the lower riser 104 is tilted until it can be pulled out. Since the gap F (8 mm) is provided between the inner peripheral surface of the upper receiving port 114 and the outer peripheral surface of the upper riser tube 102, the lower riser tube 104 can be easily tilted with respect to the upper riser tube 102. Further, since the second pipe connection mechanism 120 is loosened in the above (5), the upper pipe 102 is also changed to the lower pipe 104 by the amount of play between the lower receptacle 88a and the upper pipe 102. Follow and tilt. In the drainage facility 12, for example, the tilt angle α of the upper pipe 102 with respect to the drooping pipe 88 is 3 °, and the tilt angle β with respect to the upper pipe 102 of the lower pipe 104 is 6 °. When the tilt angle γ is 9 °, the lower pipe 104 can be pulled out. Next, (8) the lower riser tube 104 and the upper body 94 are integrally moved obliquely downward, and the upper receptacle 114 is pulled out from the upper riser tube 102. Thereby, first, the lower pipe 104 is removed (see FIG. 7C). In the cases (6) and (8), when the friction between the O-ring packing 116 and the upright tube 102 is large and it is difficult to move the lower upright tube 104 up and down, It is good to move to. Since there is a gap F (8 mm) between the inner peripheral surface of the upper receiving port 114 and the outer peripheral surface of the upright tube 102, an operation of swinging left and right is allowed. Next, (9) the fastening of the bolts and nuts 89c of the second pipe connection mechanism 120 is completely released, and the upper stand pipe 102 is pulled out from the lower receiving portion 88a of the droop pipe 88. Thereby, the upright tube 102 is removed.

According to the drainage equipment 12 of the present embodiment, the following operational effects can be obtained.
The first pipe connection mechanism 110 provided at a height that can be reached by the worker at the standing work position is configured to be able to exchange, and the worker can exchange the lower pipe 104 in the standing work. .
The drain pipe joint 80 is configured to be vertically split, and the connection between the upper body 94 and the lower body 96 is based on a flange butt connection in which the lower flange 94b and the upper flange 96c are butted, so the minimum lifting allowance U1 is compared. The insertion margin dimension E of the upper receiving port 114 can be kept relatively small.

[Embodiment 3]
The present embodiment is an embodiment in which only the setting of the insertion margin dimension E is changed in the second embodiment.

<Setting of insertion margin dimension E>
The insertion margin dimension E according to the first pipe connection mechanism 110 of the present embodiment is a dimension that can be removed together with the upper body 94 of the drainage pipe joint 90 on the lower floor B by integrating the upper riser pipe 102 and the lower riser pipe 104. Is set to That is, the connection between the upper body 94 and the lower body 96 of the drainage pipe joint 90 on the lower floor B is released, and the upper body 94 and the lower pipe 104 inserted and connected to the upper receiving port 94a of the upper body 94 are integrated. The drainage standpipe 100 is moved by moving it upward and releasing the connection of the second pipe connection mechanism 120 and moving the upper standpipe 102 downward to insert the upper standpipe 102 deeper into the upper receiving port 114. If the apparent length is shortened, the insertion margin dimension E is set so that the upper riser tube 102 and the lower riser tube 104 can be moved together with the upper body 94 of the drainage pipe joint 90 on the lower floor B and removed. Is set.
When the upper body 94 and the lower riser 104 are lifted together, a gap U is provided between the lower flange 94b at the lower end of the upper body 94 and the upper flange 96c at the upper end of the lower body 96 by the distance moved upward. Can do. The minimum value of the gap U between the lower flange 94b and the upper flange 96c that allows the upper body 94 to move horizontally is defined as a minimum lifting allowance U2.
The stagnation depth D2 (see FIG. 6) of the lower receiving portion 88a of the drooping tube 88 is the lower receiving portion of the upper end portion of the upright tube 102 by the squeezing depth D2 in the normal connection state of the second pipe connecting mechanism 120. The connection is maintained in the state where it is inserted into 88a and cannot be inserted any more. When the upper stand tube 102 is swallowed and moved relatively downward by a depth D2, the upper stand tube 102 can be pulled out from the lower receiving portion 88a, and further moved downward to move the hook portion 88b and the upper end of the upper stand tube 102 from each other. A gap (a clearance allowance) K can be provided between them (see FIG. 8A). The minimum value of the gap K between the flange 88b that can move the upper riser tube 102 horizontally and the upper end of the upper riser tube 102 is defined as the minimum undercut K2.
In the present embodiment, (insertion margin dimension E ≧ minimum lifting allowance U2 + squeezing depth D + minimum undercut allowance K2). As a result, the apparent length L ′ of the drainage stack 100 can be shortened by at least (minimum lifting allowance U2 + stagnation depth D + minimum undercut allowance K2) from the standpipe length L.
In the present embodiment, the squeezable dimension Nmax of the upper receptacle 114 is 140 mm, the upper stand tube 102 is inserted into the upper receptacle 114 by the insertion dimension S2 = 70 mm, and the insertion margin dimension E is 70 mm. Yes. On the other hand, the minimum lifting allowance U2 = 20 mm, the penetration depth D2 = 33 mm, the minimum penetration allowance K2 = 10 mm, and (the minimum lifting allowance U2 + the penetration depth D2 + the minimum penetration allowance K2) = 63 mm. The pipe 102 and the lower pipe 104 can be integrally moved together with the upper body 94 of the drainage pipe joint 90 on the lower floor B and removed.

<How to update the drainage stack 100>
Next, a method for updating the drainage stack 100 will be described with reference to FIGS. 8 (A) and 8 (B).
As shown in FIG. 8A, (1) the band member 76 of the joint support fitting 70 that supports the upper body 94 of the drainage pipe joint 90 fixed to the lower floor B is removed from the column 72, and the upper body 94 is removed. The support by the joint support fitting 70 is released. (2) The bolts and nuts 93 that fasten the lower flange 94b of the upper body 94 and the upper flange 96c of the lower body 96 are removed, and the connection between the upper body 94 and the lower body 96 is released. (3) The restriction band 140 that restricts the upper riser tube 102 from being inserted deeper than a predetermined depth into the upper receiving port 114 is removed from the upper riser tube 102. (4) Remove the band member 134 of the riser support fitting 130 that supports the upper riser tube 102 from the leg member 132, and release the support by the riser support fitting 130 to the upper riser tube 102. (5) The fastening of the bolt and nut 89c related to the second pipe connection mechanism 120 that connects the hanging pipe 88 hanging from the upper floor A and the upper end portion of the upper standing pipe 102 is released. The order of (1) to (5) above is not particularly limited. Next, (6) the lower riser tube 104 and the upper body 94 are moved upward together and the upper riser tube 102 is moved downward. As a result, the upper trunk 94 and the lower trunk 96 are separated while the upper receptacle 114 of the lower riser 104 is inserted deeply into the upper riser 102, and the upper riser 102 is pulled out from the lower receptacle 88 a of the drooping pipe 88. At this time, the lifting allowance U of the upper body 94 is set to at least the minimum lifting allowance U2 = 20 mm, and the opening allowance K of the upper end portion of the upright tube 102 is set to at least the minimum allowance allowance K2 = 10 mm. Next, as shown in FIG. 8B, (7) the upper riser tube 102 and the lower riser tube 104 are moved horizontally together with the upper body 94 and removed.

[Modification 1]
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. A drainage facility 13 according to the first modification shown in FIG. 9 is an example of a modification of the second embodiment, and is an embodiment in which the configuration of the second pipe connection mechanism 120 is changed. Portions that do not need to be changed are denoted by the same reference numerals as in the second embodiment, and detailed description thereof is omitted.
The second pipe connection mechanism 150 according to the modified example 1 is configured to connect the lower end portion of the straight tubular drooping pipe 88 and the upper end portion of the upright pipe 102 via the drainage steel pipe flexible joint 152 so that the connection can be released. It is said that. The drainage steel pipe flexible joint 152 includes an upper connection part 154a and a lower connection part 154b that can connect the straight tubular end of the vertical pipe to the upper and lower ends of the cylindrical main body 154 by so-called mechanical connection. A lower end portion of the drooping pipe 88 is connected to the upper connection portion 154a, and an upper end portion of the upright pipe 102 is connected to the lower connection portion 154b. The upper connection portion 154a and the lower connection portion 154b are provided symmetrically in the vertical direction, and the basic configuration is the same. Each of the upper connection portion 154a and the lower connection portion 154b includes a receiving port portion 156a extending at the opposite end of the cylindrical main body, and a flange member 158a formed separately from the receiving port portion 156a. And an annular packing 158b having a substantially trapezoidal cross section. The receiving port portion 156a is formed such that the straight tubular lower end portion of the drooping tube 88 or the straight tubular upper end portion of the upright tube 102 can be inserted, and has a flange portion 156b that projects horizontally outward at the end. Yes. In the state where the lower end portion of the drooping pipe 88 or the upper end portion of the upright pipe 102 is inserted into the receiving portion 156a and the annular packing 158b is disposed between the flange portion 156b and the flange member 158a, the flange member is fixed by the bolt / nut 158c. 158a is fastened to the flange 156b. By fastening the bolts and nuts 158c, the flange 156b and the flange member 158a come close to each other, the annular packing 158b is pressed, and is compressed and deformed to the outer peripheral surface of the flange 156b, the flange member 158a and the hanging pipe 88 or the upright pipe 102. It is in close contact. Thereby, the drooping pipe 88 and the upright pipe 102 are connected in a watertight manner through the flexible joint 152 for the drainage steel pipe in a state where the connection can be released.

[Modification 2]
A drainage facility 14 according to the second modification shown in FIG. 10 is an example of a modification of the second embodiment, and is an embodiment in which the configuration of the second pipe connection mechanism 120 is changed. Portions that do not need to be changed are denoted by the same reference numerals as in the second embodiment, and detailed description thereof is omitted.
In the drainage facility 14 according to the modified example 2, the upright pipe 172 is a cast iron pipe for drainage with a receptacle provided with a receptacle 174 at the upper end, and the second pipe connection mechanism 170 is the lower end of the straight tubular drooping pipe 88. And the receiving port 174 of the upright tube 172 are connected to each other so that the connection can be released by insertion connection. That is, a rubber ring having a receiving portion that directly supports the lower end surface of the drooping tube 88 is mounted inside the receiving port 174 until the lower end surface of the drooping tube 88 contacts the receiving portion of the rubber ring. The connection is maintained in a watertight manner by being inserted, and the connection can be released by pulling out the receiving port 174 from the drooping pipe 88. According to the second pipe connection structure 170 as described above, since no tool is used for releasing the connection, it does not take time to release the connection. Further, in the drainage facility 14, the outer receiving stepped portion (jaw portion) 176 is locked to the band member 134 of the support fitting 130. Therefore, the receiving port 174 of the upright pipe 172 does not come out of the drooping pipe 88 in the connected state of the second pipe connection structure 170.
In addition to drainage cast iron pipes with receptacles, drain pipes with receptacles such as resin pipes with receptacles, hard PVC-lined steel pipes with receptacles, fire-resistant double-layer pipes with receptacles, stainless pipes with receptacles, etc. Can do.

In addition, this invention is not limited to said embodiment thru | or its modification, Other various embodiment can be considered within the range which does not deviate from the summary of this invention.
The position that can be reached in the standing work state of the worker who provides the first pipe connection mechanism is not limited to the height position exemplified as the above embodiment. The height position from the upper surface of concrete slab CS is 1000-1500 mm, Preferably it is 1100-1300 mm, More preferably, it is 1150-1250 mm.
Moreover, the form by which both a 1st pipe connection mechanism and a 2nd pipe connection mechanism are inserted and connected to a receptacle may be sufficient. For example, it is possible to reduce the number of types of constituent members if the upright pipe and the downstand pipe have the same length.

It is a side view of the drainage equipment which concerns on Embodiment 1, (A) is a figure which shows the state at the time of construction, (B) is a figure which shows the update method. It is a longitudinal cross-sectional view which expands and shows the part shown as II in FIG. 1 (A). (A) is a longitudinal cross-sectional view which expands and shows the part shown as III in FIG. 1 (A). (B) is a longitudinal cross-sectional view of the main body of the socket with a cleaning port which can be used as a 1st pipe connection mechanism with the drainage of Embodiment 1. FIG. It is a side view of the drainage equipment concerning Embodiment 2. It is a longitudinal cross-sectional view which expands and shows the part shown as V in FIG. It is a longitudinal cross-sectional view which expands and shows the part shown as VI in FIG. (A)-(C) are figures which show the update method of the drainage facility shown by FIG. (A), (B) is a side view which shows the update method of the drainage equipment which concerns on Embodiment 3. FIG. It is a side view of the drainage equipment which concerns on the example 1 of a change. It is a side view of the drainage equipment which concerns on the example 2 of a change. It is a top view of the control member used with the drainage of this invention. It is a top view of the control jig used with the drainage equipment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Drainage equipment 12 Drainage equipment 13 Drainage equipment 14 Drainage equipment 20 Drainage pipe joint 28 Drainage pipe joint 30 Drainage pipe joint 40 Drainage vertical pipe 42 Upper riser pipe 44 Lower riser pipe 46 Receptacle socket 64 Upper receptacle 80 Drainage pipe joint 88 Drooping pipe 90 Drainage Pipe joint 94 Upper body 96 Lower body 100 Drainage stack 102 Upper stand pipe 104 Lower stand pipe 106 Receiving socket 110 First pipe connecting mechanism 114 Upper receiving port 120 Second pipe connecting mechanism 170 Second pipe connecting mechanism CH Through-hole CS concrete slab

Claims (2)

A drainage pipe joint that passes through the concrete slab separating the upper floor and the lower floor and is fixed to each floor, and a drainage standpipe that is piped between the upper floor drainage pipe joint and the lower floor drainage pipe joint Drainage equipment,
In the lower part of the drainage pipe joint, a drooping pipe that is suspended from the concrete slab is integrally provided,
The drainage stack includes an upper stack and a lower stack, and the upper stack and the lower stack are at a position that can be reached by a worker in a standing work state via a first pipe connection mechanism. The upper end of the upper riser is connected so as to be able to be disconnected, and is connected to the hanging pipe of the drainage pipe joint on the upper floor via a second pipe connection mechanism so that the connection can be released, and the lower riser Is connected between the lower-floor drainage pipe joint and the lower-floor drainage pipe joint by being connected to the upper part of the lower-floor drainage pipe joint,
The second pipe connection mechanism is configured as a communicable connection configuration, and an upper end portion of the upper stand pipe is provided with a receiving opening having a tapered boundary widening portion that expands in diameter upward. The receiving port and the drooping pipe of the drainage pipe joint on the upper floor are further inserted and connected in a state where they can be inserted deeply until they abut against the tapered boundary expanding portion, and the connection of the first pipe connecting mechanism is made. And releasing the upper riser pipe upward to separate the upper riser pipe and the lower riser pipe while further inserting the hanging pipe of the drainage pipe joint on the upper floor into the receptacle. Removing at least one of the upper riser part and the lower riser part from the drainage pipe joint on the upper floor or the drainage pipe joint on the lower floor by tilting at least one of the pipe and the lower riser pipe Features that are possible Drainage to. The drainage facility according to claim 1,
The receptacle provided at the upper end of the upper riser is set as a receptacle socket which is a separate component from the upper riser, and the receptacle socket is connected and fixed to the upper end of the upper riser. Drainage equipment.

Images