JP4229657B2 - Flexible connection joints for sewer main and branch pipes - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a flexible joint for inserting and connecting a branch pipe into a side hole of a sewer main pipe such as an existing or new fume pipe or box culvert.
[0002]
[Prior art]
Conventionally, when connecting the branch pipe to the sewer mains format fried connection multi Komu fitted to the main pipe from the directly above or oblique mains as shown in FIG. 4, the branch pipe end hitting the the fitting of the main pipe Even if it protrudes to the inside, there was no problem with the flowing water function, but recently there has been a need for a branch pipe that connects the main pipes that are buried in parallel or in an interlaced manner. In many cases, the main pipe is fitted and connected to the inner surface of the bottom.
[0003]
[Problems to be solved by the invention]
In such fitting from below, when the branch end protrudes to the bottom inner surface of the sewer main, it becomes an obstacle to running water, and in addition, there is a problem that impurities in the running water get caught by the protruding part and accumulate and inhibit the running water function. is there.
[0004]
[Means for Solving the Problems]
In the present invention, a side hole 2 for fitting and connecting the end of a branch pipe 11 is provided in a sewer main pipe 1 made of a fume pipe, a box culvert, and the like, and a boring part 3 made of a rectangular metal plate is provided on the outer surface of the side hole 2. A mounting plate 4 is applied, an inner cylinder 6 fitted into the side hole 2 is welded to the inside from the boring part 3, and an outer cylinder 7 is welded to the outer side from the boring part 3. A stepped outer cylinder 9 is formed by connecting a U-shaped groove-shaped receiving surface 10 to the outer end of the outer cylinder, and the end of the branch pipe 11 is received by the receiving surface 10 so that the sewer main of the branch pipe 11 end. In addition to preventing the tube 1 from projecting inside, the diameter of the stepped outer cylinder 9 is made larger than the outer shape of the branch tube 11 to allow the inclination change of the end of the branch tube 11 due to vibration after insertion connection , thereby solving such a problem. I tried to do that.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hume pipe as shown in FIG. 1, a mounting plate 4 having a counterbore 3 in comprising at rectangular metal plate on the outer surface of the side Men'ana 2 parts of the sewer main pipe 1 made of box culverts at anchor 5 stop Attaching and fitting the inner cylinder 6 shorter than the pipe thickness of the main pipe 1 by welding to the inner side of the bore part 3 and fitting it so as to contact the side hole 2, The cylinder 7 is welded and attached , and a stepped outer cylinder 9 having a diameter larger than the outer shape of the insertion branch pipe 11 is formed by extending a U-shaped groove-shaped receiving surface 10 at the outer end of the outer cylinder 7.
[0006]
The end of the branch pipe 11 is fitted with a rubber ring 12 by tightening a band 13 and fitted into the step expansion cylinder 9 , and the end of the branch pipe 11 is received by the receiving surface 10, and the tip of the rubber ring 12 is connected to the step expansion outer cylinder. 9 is fitted on the outer surface and the band 13 is tightened to prevent water leakage. The branch pipe 11 is connected between the main pipe 1 and the main pipe 1 in addition to being connected to the main pipe 1 from the factory water distribution pipe and the household drainage collecting pipe. Since the end portion of the branch pipe 11 is received by the receiving surface 10 and does not protrude into the main pipe 1, it does not cause trouble in flowing water of the main pipe 1. The diameter of the stepped拡外cylinder 9 formed larger than the outer shape of the branch pipe 11 to be fitted, so that to allow such degree of branch pipe 11 inclined change due to vibration or the like after the insertion connection.
[0007]
2 shows the shape of the mounting plate 4 , (a) is an external view, (b) is the same internal view, FIG. 3 shows an example of the shape of a connection joint, and (a) is a book of a fume tube. Side view showing connecting joint in which mounting plate 4 is formed in an arc shape for mounting tube 1, (b) is a connection in which mounting plate 4 is formed in a flat shape for mounting main tube 1 of a box culvert having a flat wall surface. Side views of the joint, (c) and (d) are side views showing an example in which the stepped outer cylinder 9 is inclined in the vertical direction, and (e) and (f) are examples in which the same is inclined in the horizontal direction. FIG. Reference numeral 14 denotes a water-expandable rubber stretched around the inner cylinder 6 and on the back surface of the mounting plate 4. In addition, it may be set as the connection joint which provided the step-shaped outer cylinder of the same shape for square tube-shaped branch pipes.
[0008]
【The invention's effect】
The present invention provides a stepped outer cylinder that expands larger than the outer diameter of a branch pipe with a U-shaped groove-shaped receiving surface sandwiched between the outer cylinder after mounting applied to a side hole of a sewer main pipe made of a fume pipe or a box culvert. Because it was provided, when inserting and connecting the branch pipe end from below toward the bottom of the main pipe, the end of the branch pipe is received by the receiving surface, so it does not protrude into the bottom of the main pipe , Since the end of the branch pipe does not protrude from the inner surface of the bottom of the main pipe, there is no obstacle to running water, and there is an effect that the flow is smooth without being caught by impurities. Further, since the diameter of the stepped outer cylinder is made larger than the outer shape of the branch pipe, there is an effect that a certain degree of change in the inclination of the branch pipe due to vibration after fitting connection can be allowed.
[Brief description of the drawings]
FIG. 1 is a partially enlarged side view showing a state in which a branch pipe is connected to a main pipe of a fume pipe by the connecting joint of the present invention. FIG. 2A is an external view of the connecting joint, and FIG. 3 (a), (c) and (e) are connection joints for a main pipe of a fume pipe, (b), (d) and (f) are connection joints for a main pipe of a box culvert, (a) is a side view; ) Is a side view of an example in which the mounting plate is a flat surface, (c) and (d) are side views showing an example in which a stepped outer cylinder is mounted inclined in the vertical direction, and (e) and (f) are inclined in the horizontal direction. Plan view showing an example of mounting [Fig. 4] Conventional example [Explanation of symbols]
1 is a main pipe 2 is a side hole 3 is a boring part 4 is a mounting plate 5 is an anchor 6 is an inner cylinder 7 is an outer cylinder 9 is a stepped outer cylinder 10 is a U-shaped groove-shaped receiving surface 11 is a branch pipe 12 is a rubber Ring 13 is band 14 is water-expandable rubber

Claims (1)

A mounting plate having a side hole 2 for fitting and connecting the end of the branch pipe 11 to a sewer main pipe 1 made of a fume pipe, a box culvert, etc., and having a bore 3 made of a rectangular metal plate on the outer surface of the side hole 2 4, the inner cylinder 6 fitted into the side hole 2 is welded and attached to the inside from the boring part 3, and the outer cylinder 7 is welded and attached to the outside from the boring part 3. A step-expanding outer cylinder 9 is formed by connecting a U-shaped groove-shaped receiving surface 10 to the outer end, and the end of the branch pipe 11 is received by the receiving surface 10, whereby the inside of the sewer main pipe 1 at the end of the branch pipe 11 . A sewer main pipe characterized in that it is prevented from projecting and the diameter of the stepped outer cylinder 9 is made larger than the outer shape of the branch pipe 11 to allow the inclination change of the end of the branch pipe 11 due to vibration after fitting connection. And flexible joints for branch pipes.

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