JPH07260049A - Manhole coupling for ribbed pipe - Google Patents

Abstract

PURPOSE:To easily and securely connect a riffed pipe to a side wall of a manhole or the like by a back-and-forth construction method. CONSTITUTION:A guide surface 32 enlarged in a tapered manner is disposed at one end of a short pipe 31, into which a pipe 1 with a rib is inserted. A saddle 33 to be connected to a side wall 2 such as a manhole is provided at the outer peripheral surface of the short pipe 31. Furthermore, an auxiliary member 35 having a guide surface 351 enlarged in a tapered manner toward an opening side is detachably disposed at the other end of the short pipe 31. Consequently, it is possible to easily and securely connect a riffed pipe to the side wall of the manhole or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole joint which can easily and reliably connect a ribbed pipe to a side wall of a manhole or the like.

[0002]

2. Description of the Related Art In the field of sewer pipes in which pipes are buried in the ground, ribbed pipes having a large number of ribs projecting from the outer peripheral surface at predetermined intervals in the pipe axial direction have been conventionally used. A manhole joint for connecting a pipe to a side wall of a manhole or the like is proposed in, for example, Japanese Utility Model Laid-Open No. 2-30593.

[0003]

However, in the case of this manhole joint, after inserting the end portion of the ribbed pipe into the hole formed in the side wall of the manhole, the outer periphery of the pipe end portion in which the hole and the rib protrude Since the mortar was filled in the gap between the surface and the surface, a large amount of mortar for backfilling was required, but there was a problem that sufficient watertightness could not be obtained.

That is, when the ribbed pipe is connected to the side wall of the manhole, a hole larger than the height of the rib must be formed as compared with the case of connecting the standard size pipe. A large amount of mortar must be filled in a wide gap between the outer peripheral surface of the pipe end and the ribs do not obstruct the filling of the mortar evenly, so sufficient watertightness is obtained. There was nothing. In addition, when the ribbed pipe is directly fixed to the side wall of the manhole with mortar, there is a problem that the end of the ribbed pipe inserted into the hole of the side wall is projected inside the manhole and then pulled back and cannot be carried out. It was

The present invention has been made to solve the above problems and provides a manhole joint in which a ribbed pipe can be simply and surely connected to a hole formed in a side wall of a manhole or the like by an exchange method.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a tapered guide surface is provided at one end of a short pipe into which a ribbed pipe is inserted, and a side wall such as a manhole is provided on the outer peripheral surface of the short pipe. Provide a saddle to be connected. Further, the other end of the short pipe is characterized in that an auxiliary member having a guide surface that expands in a tapered shape toward the opening side is detachably attached.

[0007]

Since the tapered guide surface is provided at one end of the short pipe, the ribbed pipe can be easily inserted into the short pipe. Further, since the auxiliary member having the tapered guide surface is detachably attached to the other end of the short pipe, when the ribbed pipe protruding to the other end of the short pipe is pulled back, the guide surface is You can easily pull it back as a guide.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a stage in which ribbed pipes are connected using a manhole joint showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a state where ribbed pipes are connected, and FIG. 3 is another example of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the manhole joint which shows an Example, In the figure, the code | symbol 1 is a pipe with a rib, 2 is a side wall of a manhole etc., 3 is a manhole joint.

The ribbed pipe 1 is a pipe made of a synthetic resin such as vinyl chloride resin or polyethylene, and a large number of ribs 11 are provided on the outer peripheral surface thereof at predetermined intervals in the axial direction of the pipe. A packing 12 is attached between the ribs 11 at the end of the ribbed pipe 1 so as to slightly project from the rib 11.

On the other hand, the manhole joint 3 is composed of a short tube 31 made of synthetic resin, a saddle 33 and an auxiliary member 35, and a guide surface 32 which is expanded in a tapered shape is provided at one end of the short tube 31. The inner diameter of the short pipe 31 is set to an intermediate value between the outer diameter of the rib 11 of the ribbed pipe 1 and the outer diameter of the packing 12, and when the end of the ribbed pipe 1 is fitted into the short pipe 31, The outer peripheral surface of the packing 12 is watertightly adhered to the inner peripheral surface of the short pipe 31. Further, a cylindrical body 34 having a saddle 33 is externally fixed to the outer peripheral surface of the short pipe 31, and a guide surface 351 which is expanded in a tapered shape toward the opening side is provided at the other end of the short pipe 31. The auxiliary member 35 has is detachably attached. The saddle 33 is a short pipe 3.
It may be integrally provided on the outer peripheral surface of 1.

A ribbed pipe 1 is attached to a side wall 2 such as a manhole.
First, a hole 21 that is slightly larger than the outer diameter of the short pipe 31 of the manhole joint 3 is bored in the side wall 2 before connecting to. Therefore, the end of the ribbed pipe 1 is inserted into the short pipe 31 of the manhole joint 3, and the packing 12 attached to the end is pushed along with the guide surface 32 of the short pipe 31 while reducing its diameter. Next, the other end of the short pipe 31 is inserted into the hole 21 formed in the side wall 2, and the ribbed pipe 1 protruding from the other end of the short pipe 31 by the exchange method as shown by the two-dot chain line in FIG. Of the short tube 31 is pulled back to match the end of the short tube 31.
At this time, since the packing 12 attached to the end portion of the ribbed pipe 1 is reduced in diameter along the guide surface 351 of the auxiliary member 35 attached to the other end portion of the short pipe 31, it is easy to pull back the ribbed pipe 1. You can do it.

In this way, after the ribbed pipe 1 and the manhole joint 3 are set at predetermined positions, the auxiliary member 35 is removed from the other end of the short pipe 31, and the saddle 33 of the manhole joint 3 as shown in FIG. A space between the side wall 2 such as a manhole and the hole 21 is filled with a binder 4 such as mortar for connection. Thus, the ribbed pipe 1 and the side wall 2 such as the manhole are firmly joined via the manhole joint 3.

In the manhole joint 3 shown in FIG. 3, when the manhole joint 3 and the side wall 2 such as a manhole are connected by using a bonding material 4 such as mortar, the auxiliary member 35 is embedded without being removed. It is a thing. When the auxiliary member 35 is not removed as in this embodiment,
Even after connecting the manhole joint 3 to the side wall 2 of the manhole or the like, the method of exchanging the ribbed pipe 1 can be easily performed.

[0014]

As described above in detail, since the present invention is provided with the guide surfaces at both ends of the short pipe, the connecting work for inserting the end of the ribbed pipe into the short pipe and the other end of the short pipe. The work of pulling back the end of the ribbed pipe protruding from the can be done easily.
Therefore, when the manhole joint of the present invention is used, the on-site exchange method can be easily performed, and the ribbed pipe can be connected to the side wall of the manhole or the like easily and securely.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in the middle of connecting ribbed pipes using a manhole joint showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which a pipe with ribs is connected to a side wall of a manhole or the like.

FIG. 3 is a sectional view of a manhole joint showing another embodiment of the present invention.

[Explanation of symbols]

 1 Pipe with rib 2 Side wall such as manhole 3 Manhole joint 4 Bonding material such as mortar 11 Rib 21 Hole 31 Short tube 32 Guide surface 33 Saddle 35 Auxiliary member

Claims (1)

[Claims] 1. A ribbed pipe (1) having a large number of ribs (11) projecting from the outer peripheral surface thereof at predetermined intervals in the axial direction of the pipe is connected to a hole (21) formed in a side wall (2) such as a manhole. A manhole joint (3) used in this case, in which a tapered guide surface (32) is provided at one end of a short pipe (31) into which the ribbed pipe (1) is inserted, and the short pipe is also provided. A saddle (33) connected to the side wall (2) such as a manhole is provided on the outer peripheral surface of (31), and a guide surface that tapers toward the opening side is provided at the other end of the short pipe (31). (3
A ribbed pipe manhole joint, wherein an auxiliary member (35) having 51) is detachably attached.