JPH07127111A - Connecting structure for drainage pipe - Google Patents

Abstract

PURPOSE:To make it possible to connect drainage pipes even in such a state that they are arranged not to be pulled out, and what is more, to prevent an adaptor pipe from being rotated when they are connected by eliminating an ear-shaped piece which is projecting installed to one drainage pipe when interconnecting drainage pipes in a prior art construction method and which is a constant trouble to the prior art construction method, since concrete chipping or the like is required again when the ear-shaped piece is damage after construction. CONSTITUTION:An engagement bolt 6, which can be further fastened at the outer peripheral surface of the other drainage pipe 2 when one drainage pipe 3 is connected to the other drainage pipe 2, is installed to one drainage pipe 3 to be connected while an engagement unit 5, which prevents the engagement bolt 6 from moving in the peripheral direction of the outer peripheal surface and inhibits one drainage pipe 3 from moving in the pulling out direction, is installed to the outer peripheral surface of the outer drainage pipe 2. One drainage pipe is connected to the other drainage pipe 2 in a rotation-impossible-state, and what is more, in a pulling-out-impossible-state by connecting one drainage pipe 3 to the other drainage pipe 2 with the engagement bolt 6 engaged with the engagement unit 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe connection structure.

[0002]

2. Description of the Related Art The present applicant has previously filed Japanese Patent Application No. 5-97212.
No. 3, discloses a structure for preventing the lateral branch pipe from coming off. FIG. 12 shows this slip-out prevention structure with reference to FIG. 1 of the same application. According to this slip-out prevention structure, the lateral branch pipe 50 connected by the one-touch packing method can be securely connected to the connection pipe portion 52 of the drainage pipe joint 51 in a state in which it does not slip off. The connection structure of the drain pipe such as the lateral branch pipe by the one-touch packing method is also disclosed in Japanese Patent Application No. 4-78233 filed by the present applicant.

[0003]

However, in the above-mentioned structure for preventing slipping off, the connecting pipe portion 52 has the ear-shaped pieces 52a, 52a.
This ear-shaped piece 52a
May be damaged as shown in FIG. 13, and if it is damaged, it is necessary to replace the entire drainage pipe joint 51. In order to replace the drainage pipe joint 51, it is necessary to redo various works such as chipping of the concrete slab S, which requires a great deal of labor, time and cost.

This point is not limited to the structure for preventing the drain pipe from coming off by the one-touch packing method described above.
The same applies to the drain pipe connection structure using the bolt connection method, which is a more general connection method, as shown in FIG. 3, and the ear-shaped piece 61 formed to project on the drain pipe 60 on the right side in the figure is missing and the work must be redone. was there.

Here, when connecting the lateral branch pipe to the connecting pipe portion of the drain pipe joint as described above, or when connecting the drain pipe and the drain pipe in general, when both drain pipes are not connected concentrically That is, when connecting both drain pipes at a right angle, such as when they are connected at a certain angle, or when they are connected in parallel at regular intervals, a pipe joint such as shown in FIG. , "Adapter tube") 70 is used. Using this adapter pipe 70, for example, a lateral branch pipe 73
Drain pipe (not shown) such as the connection pipe portion 7 of the drain pipe joint 71
In the case of connection to No. 2, a force F for rotating the adapter pipe 70 around the axis of the connecting pipe portion 72 acts by the own weight of the lateral branch pipe 73 as shown in FIG. Therefore, the adapter pipe 70 is fixed to the connection pipe portion 72 so as not to rotate around the axis of the connection pipe portion 72, or a separate holding means is provided to prevent the lateral branch pipe 73 from moving. I need to put it.

As described above, when connecting the lateral branch pipes 73 to the connecting pipe portion 72 via the adapter pipe 70 in a non-concentric manner, the adapter pipe 70 is not rotated around the axis of the connecting pipe portion 72. As a means for this, the ear-like piece as described above is provided so as to project from the connection pipe portion, and the adapter pipe is connected by the bolt connection method using this ear-like piece. , This adapter tube was fixed non-rotatably. Therefore, the connection of this adapter pipe also has a problem that the ear piece is damaged as described above.

The adapter pipe 70 illustrated in FIG. 15 is L-shaped and is used when the lateral branch pipe 73 is connected at a right angle to the connection pipe portion 72 of the drainage pipe joint 71. In addition to this, although not shown in the drawings, there is a substantially S-shaped type used when connecting a drain pipe and a drain pipe in parallel at a constant interval, and various adapter pipes suitable for other connection modes are conventionally used. More used. Since most of the connection methods for the adapter pipes of these various modes are based on the above-mentioned bolt connection method, the above-mentioned problems are common to the adapter tubes.

According to the present invention, the drainage pipe including the adapter pipe described above can be reliably connected to the drainage pipe in a state in which the drainage pipe is prevented from slipping out and prevented from rotating, without using a conventional ear piece. It is intended to provide a structure.

[0009]

Therefore, in the invention described in claim 1, when one drain pipe is connected to the other drain pipe, the other drain pipe is connected to the other drain pipe. A locking bolt is provided so that it can be tightened toward the outer peripheral surface, while the outer peripheral surface of the other drain pipe moves the locking bolt in the circumferential direction of the outer peripheral surface and pulls out the one drain pipe. By providing a locking portion for preventing movement in the direction, and connecting the one drain pipe and the other drain pipe in a state in which the locking bolt is locked to the locking portion, the one A drainage pipe connection structure was created, in which the drainage pipe is connected to the other drainage pipe in a non-rotatable and non-detachable state.

According to the second aspect of the present invention, one drainage pipe to be connected is provided with a support edge protruding laterally to the other drainage pipe when the one drainage pipe is connected to the other drainage pipe. , A locking bolt is provided on this support edge so that it can be tightened toward the other drainage pipe, and on the outer peripheral surface of the other drainage pipe, the locking bolt in the circumferential direction of the outer peripheral surface is provided. Provided with a locking groove portion for preventing movement and movement of the one drainage pipe in the pulling-out direction, the one drainage pipe and the one drainage pipe in the state where the tip end portion of the locking bolt is inserted into the locking groove portion. A drainage pipe connecting structure was created, in which the other drainage pipe is connected to the other drainage pipe in a non-rotatable and non-detachable state by connecting the other drainage pipe. .

According to the third aspect of the present invention, one drainage pipe to be connected is provided with a support edge that projects laterally from the other drainage pipe when the one drainage pipe is connected to the other drainage pipe. , A locking bolt is provided on this support edge so that it can be tightened toward the other drainage pipe, and on the outer peripheral surface of the other drainage pipe, the locking bolt in the circumferential direction of the outer peripheral surface is provided. Locking groove portions for preventing movement and movement of the one drainage pipe in the pulling-out direction are provided at a plurality of locations along the circumferential direction, and a tip end portion of the locking bolt is provided in the plurality of locking groove portions. By connecting the drain pipe of the one and the drain pipe of the other in a state of being inserted into the appropriately selected locking groove portion, the posture of the drain pipe of the one with respect to the drain pipe of the other is arbitrarily selected. It is connectable and one of the above The water tube was created a connection structure of the drain pipe, characterized in that the configuration of connecting nonrotatably, but missing a condition not to the other of the drain pipe.

[0012]

According to the structure of the first aspect, in the state where one drain pipe is connected to the other drain pipe, the locking bolt provided on one drain pipe is provided on the other drain pipe. The locking portion locks the other drainage pipe so that it cannot move in the circumferential direction of the outer peripheral surface and cannot move in the drainage direction of the other drainage pipe. Therefore, one drain pipe is connected to the other drain pipe in a non-rotatable and non-detachable state. As described above, since the other drain pipe is not provided with the protruding ear-shaped piece as in the prior art, there is no problem that the work such as chipping of concrete is forced to be redone.

The function of connecting the one drain pipe to the non-rotatable one is that the one drain pipe is, for example, S-shaped or L-shaped.
This is meaningful when it is a V-shaped adapter tube. That is, when, for example, a horizontal branch pipe is connected to the connection pipe portion of the drainage pipe fitting in parallel at a constant interval or inclined upward at a constant angle using such an adapter pipe, Since the axial centers of the branch pipe and the connecting pipe portion do not coincide with each other, a force for rotating the adapter pipe around the axial center of the connecting pipe portion is applied by the weight of the lateral branch pipe. Therefore, in order to hold the lateral branch pipe at a fixed position, a separate holding means is required. According to the above configuration, the adapter pipe is non-rotatably connected to the connecting pipe portion. Therefore, the lateral branch pipe can be held at a fixed position without requiring such special means.

According to a second aspect of the present invention, the locking portion in the above-described configuration is a locking groove portion. According to this structure, the locking bolt is inserted into the locking groove portion. By connecting one drain pipe to the other drain pipe, the same operation as described above is obtained.

According to the third aspect of the invention, it is possible to connect one drain pipe to the other drain pipe by arbitrarily selecting the posture, and in each posture, one drain pipe is connected to the other drain pipe in the same manner as described above. It is connected to the drain pipe so that it cannot rotate and cannot be removed.

Since one drain pipe can be connected to the other drain pipe in a selected posture as described above, for example, an S-shaped or L-shaped adapter pipe is used as described above. When connecting the horizontal branch pipe parallel to the connection pipe part of the drainage pipe joint at a constant interval or in a state inclined upward at a constant angle, the horizontal branch pipe can be selected from any position that can be selected. Can be connected. According to this
The versatility of the drainage pipe joint can be increased for various types of pipe paths.

[0017]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a horizontal branch pipe 4 is connected to a connection pipe portion 2 of a drainage pipe joint 1 fixed to a concrete slab S via an adapter pipe 3. The adapter pipe 3 has a substantially S-shaped bent shape as shown in the drawing. With this adapter pipe 3, the lateral branch pipe 4 is connected to the connecting pipe portion 2
Are connected in parallel at regular intervals.

A plurality of engaging groove portions 5 to 5 are formed on the outer peripheral surface of the distal end of the connecting pipe portion 2 of the drainage pipe joint 1. The locking groove portions 5 to 5 correspond to the locking portion described in claim 1.
As shown in FIG. 2, each locking groove portion 5 has a pair of locking edges 5a formed on the outer peripheral surface of the connecting pipe portion 2 so as to be raised.
5a. That is, both locking edges 5a, 5
There is one locking groove portion 5 between a. Each locking edge 5a ~
5a is formed along the axial center of the connecting pipe portion 2, and therefore each locking groove portion 5 is also provided along the axial center of the connecting pipe portion 2. Both locking edges 5 that form one locking groove 5
The interval between a and 5a is slightly larger than the screw diameter of the locking bolt 6 described later, and is set to a necessary and sufficient interval for inserting this locking bolt 6.

As shown in FIG. 3 (a), the engaging groove portions 5 to 5 are provided at intervals of about 45 ° in the right half circumference of the connecting pipe portion 2. Therefore, the connecting pipe portion 2 is provided with locking groove portions 5 to 5 at a total of 5 positions at intervals of about 45 ° in the circumferential direction. As shown in FIG. 1, the front end side (the left end side in the drawing) of each locking groove portion 5 has locking edges 5a, 5a.
Are closed because they are formed in a U-shape. On the other hand, the rear end side (right side in the drawing) of the locking groove portion 5 is open.

Next, a flange portion 3a is formed at the end of the adapter pipe 3 on the side of connection to the connection pipe portion 2, and one supporting edge 3b is formed at the peripheral edge of the flange portion 3a. The support edge 3b is formed so as to project forward along the axis of the connection-side tip of the adapter tube 3,
When the adapter pipe 3 is connected to the connection pipe portion 2, the support edge 3b is formed on the side of the locking groove portion 5 described above.

A locking bolt 6 is attached to the support edge 3b thus formed so that it can be tightened. As described above, in the locking bolt 6, the support edge 3b has the locking groove portion 5
It is mounted so that when it is tightened in the state of being positioned on the side, the tip portion thereof projects into the locking groove portion 5. When the locking bolt 6 is tightened and the tip thereof is projected into the locking groove portion 5, in other words, the locking bolt 6 is located between both locking edges 5a, 5a forming one locking groove portion 5. When the locking bolt 6 is tightened to come into contact with the outer peripheral surface of the connecting pipe portion 2, the locking bolt 6 is prevented from moving in the detaching direction of the adapter pipe 3 by the tip closing portion of the locking groove portion 5, and The movement of the portion 2 in the circumferential direction is blocked by the locking edges 5a, 5a.

By adjusting the position of the adapter pipe 3 around the axis of the connecting pipe portion 2 and arbitrarily selecting the locking groove portion 5 into which the locking bolt 6 is tightened, from among the above-mentioned five positions. , The adapter pipe 3 as shown in FIG.
It is possible to arbitrarily select and connect five positions within a range of about 180 ° around the axis. That is, the adapter tube 3 is in the vertical position in FIG.
45 ° leaning posture of the left side, 45 ° leaning posture of the left side of FIG.
It can be connected to a total of five postures including the left and right lateral postures in the diagram (d).

Next, on the outer peripheral surface of the distal end portion of the adapter pipe 3 on the side to which the lateral branch pipe 4 is connected, the same engaging groove portion 7 as described above is provided.
~ 7 are provided. The locking groove portion 7 is used for connecting the lateral branch pipe 4 in a state in which it cannot rotate and is prevented from coming off. Therefore, although not shown in the drawings, a supporting edge similar to the above-mentioned supporting edge 3b is provided at the connecting-side tip of the lateral branch pipe 4,
A locking bolt is likewise attached to this support edge. That is, the connection structure of the adapter pipe 3 to the connection pipe portion 2 and the connection structure of the lateral branch pipe 4 to the adapter pipe 3 have the same configuration.

Although not shown, the adapter tube 3
The tip end of the flange 3a is inserted into the inner peripheral side of the connecting pipe 2, and between the end and the inner peripheral surface of the connecting pipe 2,
A packing for interposing a seal between the two is interposed.

According to the connection structure of the present embodiment constructed as described above, the adapter pipe 3 is connected to the connection pipe portion 2 of the drainage pipe joint 1 as follows. A packing is attached to the tip end portion of the adapter pipe 3 rather than the flange portion 3a, and the tip end portion is inserted into the inner peripheral side of the connection pipe portion 2. After that, adapter tube 3
Of the connecting postures (a) to (d) described above in a posture suitable for the pipe path of the lateral branch pipe 4, and in this state, tighten the locking bolt 6 until it comes into contact with the outer peripheral surface of the connecting pipe portion 2. Then, the tip of the locking bolt 6 is positioned in the locking groove portion 5, that is, between the locking edges 5a, 5a.

When the locking bolt 6 is tightened in this manner, the locking bolt 6 is moved in the circumferential direction of the connecting pipe portion 2 and the moving direction of the adapter pipe 3 in both locking edges 5a, 5a.
Since it is regulated by a and its end closed portion, the adapter pipe 3 is connected to the connection pipe portion 2 in a state in which it is not rotatable around its axis and is immovable in the removal direction, that is, is prevented from coming off. It From this, the adapter tube 3 can be connected to the connection tube portion 2 side in a state in which the adapter tube 3 cannot rotate around the axis of the connection tube portion 2 and is prevented from being detached, without providing a conventional ear-shaped piece. Therefore, the problem of re-doing the construction that occurs when the conventional ear piece is lost does not occur.

Although the illustrated engaging groove portion 5 is provided in the range of a half circumference in the circumferential direction of the outer peripheral surface of the connecting pipe portion 2, the connecting pipe portion is provided as shown in FIG. 3 (b). It may be provided over the entire circumference of the second outer peripheral surface. Also,
This locking groove portion 5 is, for example, 3 apart from the exemplified 45 ° interval.
It can be set arbitrarily such as being provided at 0 ° intervals, and does not necessarily have to be even intervals.

Further, when the locking groove portion 5 is provided in the range over the entire circumference of the connection pipe portion 2, the support edge 3b provided on the adapter pipe 3 side is not provided at one place but at a plurality of places on the periphery of the flange portion 3a. Alternatively, the locking bolts 6 may be provided and mounted in the same state as described above. in this case,
It is desirable that the plurality of support edges 3b to 3b be arranged at positions that equally divide the peripheral edge of the flange portion 3a. According to this, the adapter pipe 3 can be connected more firmly. In this way, the disposition range, disposition number, etc. of the engaging portion (engagement groove portion 5) or the disposition position, disposition number, etc. of the support edge 3b and the engaging bolt 6 can be arbitrarily set.

Further, the locking portion for restricting the movement of the locking bolt 6 is not limited to the locking groove portion 5 illustrated, but may be, for example, FIG.
The locking recess 22a as shown in 0 may be used. This will be described in more detail.

In the embodiment described above, the case where the lateral branch pipe 4 is connected in parallel to the connecting pipe portion 2 of the drainage pipe joint 1 by using the S-shaped adapter pipe 3 has been described as an example. The connection structure of the present invention is not limited to this, but can be widely applied to various drain pipes connected in various modes as described below.

FIGS. 5 and 6 show a state in which the lateral branch pipe 15 is connected to the connecting pipe portion 11 of the drainage pipe joint 10 at a substantially right angle by using the L-shaped adapter pipe 12.
In this case as well, the tip outer peripheral surface of the connecting pipe portion 11 is
The locking groove portions 13 are provided at intervals of 45 ° in the range of the upper half thereof, that is, at a total of five positions. On the other hand, a flange portion 12a is provided near the tip of the adapter pipe 12 on the side connected to the connection pipe portion 11, and a similar support edge 12b is formed to extend at one location of the peripheral edge portion of the flange portion 12a. Locking bolts 14 are attached to the support edges 12b so as to be tightened toward the inside of the locking groove portions 13.

With this adapter pipe 12 as well, by tightening the locking bolt 14 into the locking groove portion 13 at a proper position, it is possible to connect to the connecting pipe portion 11 in a non-rotatable and non-removable manner. The adapter tube 12 can be connected by changing it to the above-mentioned five postures. 5 and 6,
The state in which the adapter tube 12 is connected to the above-described (c) left 45 ° inclined posture is shown. On the other hand, FIG. 7 shows a state in which the adapter tube 12 is connected in the vertical posture (a). However, in FIG. 7, the engaging groove portions 13 to 13 are formed in the range of the right half of the connecting pipe portion 11. A similar locking groove is also provided on the outer peripheral surface of the end of the adapter tube 12 on the side to which the lateral branch tube 15 is connected. This allows the lateral branch tube to be non-rotatable and prevented from coming off. The points that can be connected are the same.

FIG. 8 shows a state in which the lateral branch pipe 33 is connected to the connection pipe portion 32 of the drainage pipe joint 31 via the adapter pipe 30 which is bent in a substantially V shape. The adapter tube 30 is similar to the adapter tube 12 except that the bent shape is not L-shaped but substantially V-shaped. According to the substantially V-shaped adapter pipe 30, the lateral branch pipe 33 is connected while being inclined at about 45 ° with respect to the axis of the connecting pipe portion 32. The adapter tube 30 can be connected by arbitrarily selecting the above-mentioned postures (a) to (d), and the adapter pipe 30 can be connected in the postures (a) to (d). Since it is connected to the connection pipe portion 32 in a non-rotatable and non-pullable manner, the lateral branch pipe 33 is, for example, in the vertical posture shown in FIG.
It is securely held in the connected state in a posture inclined at °.

Further, in the connection structure illustrated above in FIG. 9, a bifurcated adapter pipe 35 having an L shape and capable of connecting two lateral branch pipes is connected to a connection pipe portion 37 of a drainage pipe joint 36. The case applied is shown. That is,
A plurality of locking groove portions 37a to 37a are formed on the outer peripheral surface of the distal end of the connecting pipe portion 37 in the range of the half circumference or the entire circumference,
A flange portion 35a is formed at an end portion on the connection side of the adapter pipe 35, and a supporting edge 35b is formed at an appropriate position in the circumferential direction of the flange portion 35a. A locking bolt 35c is provided on the supporting edge 35b. It is attached so that it can be tightened toward 37a. With the above configuration, the adapter pipe 35 is prevented from coming off from the connection pipe portion 37 and is connected to the connection pipe portion 37 so as not to be rotatable about the axis, and thus is held in the vertical position (a) shown in the drawing. In addition, the locking groove portion 3 at an appropriate position
Similarly, the connection postures (a) to (d) can be arbitrarily selected by selecting 7a. Also, the adapter tube 3
5, a similar locking groove is also formed on the outer peripheral surfaces of the tips of the bifurcated pipes 35d and 35e.
It is the same that 9 is connected to both bifurcated pipe portions 35d and 35e so as not to come off, and is non-rotatably connected around its axis.

Next, FIG. 10 shows a case where the connection structure of the present invention is applied to a case where the inspection window cover 20 is attached to the connection pipe portion 22 of the drainage pipe joint 21. The lid 20 with an inspection window is conventionally attached to a drain pipe joint or the like for the case of performing a full water test of the drain pipe. In the case of this example, the lid 20 corresponds to a drain pipe.

On the outer peripheral surface of the connecting pipe portion 22, the engaging recesses 22a to 22a are provided at a plurality of positions at appropriate intervals in the circumferential direction.
Is provided. Each locking recess 22a is connected to the connecting pipe portion 22.
A bottomed hole having a diameter into which a tip portion of a locking bolt 20c described below can be inserted is formed substantially in the center of a pedestal portion 22b in which the outer peripheral surface of the above is formed at an angle of about 45 ° in the circumferential direction. It is said that. On the other hand, the lid 20 has a flange portion 20.
a is formed, and one support edge 20b is integrally formed on the peripheral edge of the flange portion 20a, and the support bolt 20 is so formed that it can be tightened toward the engagement recess 22a.
0c is attached. A screw lid 20d for opening and closing the inspection window is detachably attached to the lid 20.

According to such a connecting structure, the lid 20 is attached to the connecting pipe portion 22 with the engaging bolt 20c inserted in the arbitrarily selected engaging recess 22a, so that the lid 20 is secured. Can be attached around the axis of the connecting pipe portion 22 in a state where it cannot rotate and is prevented from coming off. Lid 2
Since 0 is attached to the connecting pipe portion 22 so as not to rotate about the axis, the inspection window inclined obliquely upward in the drawing should always be maintained in a fixed direction without displacement. You can

As for the mounting structure (connection structure) of the lid 20 with the inspection window to the connecting pipe portion 22 as described above, the number of locking recesses or the like or the locking bolts 20c are as described above.
The number of arrangements, etc. can be set arbitrarily.

Next, an example of another embodiment will be described.
In the embodiment illustrated above, the supporting edge 3b (12b, 35b)
Was formed integrally with the adapter tube 3 (12, 35), but in the embodiment described below, when this support edge is formed in a connector separate from the adapter tube as shown in FIG. Is illustrated. This connecting tool 40 is mainly composed of semi-arcuate fixing members 41 and 42 which are wound around and attached to a drain pipe 45 by bolts 41a as shown in the figure. A support edge 43 is formed on the fixing member 41 on the upper side so as to extend along the axial direction of the drain pipe 45. A locking bolt 44 is similarly attached to the tip of the support edge 43 so that it can be tightened. On the other hand, locking groove portions 46a to 46a are formed on the outer peripheral surface of the distal end of the other drainage pipe 46 to which the drainage pipe 45 is connected, and this point is the same as the above-mentioned various examples.

According to the connecting tool 40 thus constructed, the drainage pipe 45 is connected to the other drainage pipe 46, and both fixing members 41 and 42 are wound around the drainage pipe 45 so as to form a support edge. The drain pipe 45 is attached to the other drain pipe 46 by placing 43 in a state of overhanging to the side of the lock groove portion 46a, then tightening the lock bolt 44 and positioning the tip end thereof in the lock groove portion 46a. On the other hand, it is prevented from coming off and is connected so as not to rotate around the axis. When the drain pipe 45 is, for example, the adapter pipe 3 (12, 30, 35) described above or the lid 20 with the inspection window, the position of the connector 40 in the circumferential direction is adjusted to select the locking groove portion 46a. This is the same in that the connection can be held in any connection postures (a) to (d).

In addition, FIG. 11 (a) shows that the connector 40 of the present example is a drain pipe 45 and a drain pipe 46 by a bolt connection method.
FIG. 6B shows a state in which the lateral branch pipe 47 is connected to the connection pipe portion 48a of the drainage pipe joint 48 by the one-touch packing method. As described above, the connection structure using the connection tool 40 of the present example is applicable to various types of connection methods, and in any of the methods, the drain pipe 45 (side branch pipe 47) is connected to the other drainage system. The pipe 46 (connection pipe portion 48a) can be prevented from coming off and can be connected in a non-rotatable state. Moreover, since the connecting tool 40 can be attached and detached even after the pipe construction, by using the connecting tool 40 as required, efficient piping work can be performed at low cost.

[0042]

According to the invention of claim 1 or 2,
One drain pipe is connected to the other drain pipe in a non-rotatable and non-removable manner without the conventional ear-like piece protrudingly provided on the drain pipe. Therefore, there is no problem in the related art such as the chipping of concrete and the redoing of the work due to the loss of the ear pieces.

According to the invention of claim 3, in addition to the effect obtained by the invention of claim 1 or 2, the versatility of the drainage pipe can be enhanced with respect to the various types of drainage pipe routes. it can.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention and showing a state in which a lateral branch pipe is connected to a drainage pipe joint by using an S-shaped adapter pipe.

FIG. 2 is a perspective view showing a state in which a locking bolt is locked in a locking groove portion.

3A and 3B are vertical cross-sectional views of a connecting pipe portion showing a range in which a locking groove portion is provided, where FIG. 3A is a sectional view taken along the line AA of FIG. 1 and FIG. The case where the locking groove is provided in the range over the entire circumference is shown.

4A and 4B show five connection postures of the adapter pipe with respect to the connection pipe portion. FIG. 4A is a vertical posture, FIG. 4B is a left tilted posture, and FIG. , (D) shows a lateral posture.

[Fig. 5] Left L-shaped adapter pipe is used as a drainage pipe fitting and left 45 °
It is a side view which shows the state connected in the inclination posture.

FIG. 6 is an L-shaped adapter pipe used as a drainage pipe fitting and left 45 °
It is a front view which shows the state connected in the inclination posture.

FIG. 7 is a side view showing a state in which an L-shaped adapter pipe is connected to a drain pipe joint in a vertical posture.

FIG. 8 is a side view showing a state in which a substantially V-shaped adapter pipe is connected to a drain pipe joint in a vertical posture.

FIG. 9 is a side view showing a state in which a bifurcated adapter pipe is connected to a drain pipe joint in a vertical posture.

FIG. 10 is a side view showing a state in which a lid with an inspection window is attached to a connection pipe portion of a drainage pipe joint.

FIG. 11 is a diagram showing a connection structure using a connecting tool, which is separated (a).
Is a side view showing a case where a connecting tool is used for connecting a drainage pipe by a bolt connection method, and FIG. 6B is a side view showing a case where a connecting tool is used for connecting a lateral branch pipe according to a one-touch packing method. Is.

FIG. 12 is a partially cutaway side view of a horizontal branch pipe and a drainage pipe joint which are connected in a state in which they are prevented from coming off by a conventional connection structure.

FIG. 13 is a perspective view of the distal end portion of the drainage pipe showing a state in which the ear piece is missing.

FIG. 14 is a partially cutaway side view of a conventional drainage pipe connection structure, in which the drainage pipes are connected by a bolt connection method.

FIG. 15 shows a conventional connection structure having no detent function, and FIG. 15A is a front view of a drain pipe joint and an L-shaped adapter pipe connected to the drain pipe joint. Figure (b) is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drain pipe joint 2 ... Connection pipe part 3 ... S-shaped adapter pipe 4 ... Side branch pipe 5 ... Locking groove part (locking part) 5a ... Locking edge 6 ... Locking bolt 12 ... L-shaped Adapter tube 20 ... Lid with inspection window 30 ... V-shaped adapter tube 35 ... Bifurcated adapter tube 40 ... Connector 52a ... Ear-shaped piece

Claims (3)

[Claims] 1. One of the drain pipes to be connected is provided with a locking bolt that can be tightened toward the outer peripheral surface of the other drain pipe when the drain pipe is connected to the other drain pipe. A locking portion is provided on the outer peripheral surface of the other drain pipe to prevent movement of the locking bolt in the circumferential direction of the outer peripheral surface and movement of the one drain pipe in the removal direction. By connecting the one drain pipe and the other drain pipe in a state where the locking bolt is locked to the locking portion, the one drain pipe cannot rotate with respect to the other drain pipe. A drainage pipe connection structure characterized in that the connection is made in a state that cannot be pulled out. 2. One of the drain pipes to be connected is provided with a support edge that extends to the side of the other drain pipe when the one drain pipe is connected to the other drain pipe. A locking bolt is provided so that it can be tightened toward the other drain pipe, while the outer peripheral surface of the other drain pipe moves the locking bolt in the circumferential direction of the outer peripheral surface and the one drainage. A locking groove is provided to prevent the pipe from moving in the pulling direction, and the one drain pipe and the other drain pipe are connected in a state where the tip of the locking bolt is inserted into the locking groove. By doing so, the drainage pipe connection structure is characterized in that the one drainage pipe is connected to the other drainage pipe in a non-rotatable and non-pullable state. 3. One of the drain pipes to be connected is provided with a support edge that extends laterally to the other drain pipe when the one drain pipe is connected to the other drain pipe. A locking bolt is provided so that it can be tightened toward the other drain pipe, while the outer peripheral surface of the other drain pipe moves the locking bolt in the circumferential direction of the outer peripheral surface and the one drainage. Locking groove to prevent movement of the pipe in the pulling direction,
It is provided at a plurality of locations along the circumferential direction, and the one end of the drainage pipe and the other of the other one are provided in a state in which the tip end portion of the locking bolt is inserted into an appropriately selected locking groove portion of the plurality of locking groove portions. By connecting the drain pipe, it is possible to arbitrarily select and connect the posture of the one drain pipe with respect to the other drain pipe, and in one of the postures, the one drain pipe with respect to the other drain pipe. The drainage pipe connection structure is characterized in that it is connected so that it cannot rotate and cannot be pulled out.