JPH061448U - Structure for connecting manhole and connecting pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that the manhole and connection pipe can be connected with a simple structure. [Structure] A flange-shaped ring 9 divided in the circumferential direction is externally fitted and fixed to the outer periphery of the end portion of a connecting pipe 7 connected to a manhole 1. The end portion of the connecting pipe 7 including the ring 9 is embedded in the side wall 5 of the manhole 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joint structure of a manhole and a connecting pipe.

[0002]

[Prior art]

 When connecting a conduit to a manhole provided in the ground, a short pipe for connection is fixed integrally with this manhole, and the pipe constituting the conduit is fixed to the short pipe for connection. It is common to connect. The manhole is usually made of concrete, and the short pipe is made of cast iron pipe.

[0003]

[Problems to be solved by the device]

 However, since it is generally difficult to integrate the manhole and the pipe body made of different materials in this way, there are problems such as the need for a complicated joint structure to secure the connection. is there. In addition, it is often necessary to adjust the dimensions of the manhole and pipes at the construction site due to cutting pipes, etc., which requires time and labor for cutting pipes and modifying the structure of the pipe end after cutting pipes.

Therefore, the present invention solves such a problem, and makes it possible to securely connect the manhole and the connecting pipe with a simple structure, and also to facilitate the dimension adjustment work by the cutting pipe. With the goal.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a flange-shaped ring, which is split in the circumferential direction, is externally fitted and fixed to the outer periphery of the end of the connecting pipe connected to the manhole, and the end of the connecting pipe including this ring is fixed. The part is embedded in the wall of the manhole.

[0006]

[Action]

 According to this structure, the ring is fitted to the outer periphery of the end of the connecting pipe and fixed, and then that part is embedded in the wall of the manhole. The competition will be ensured. When the connecting pipe is cut to adjust its dimensions, the ring is similarly fitted to the end of the cutting pipe by external fitting so that the connection can be done without requiring any troublesome work.

[0007]

【Example】

 In FIG. 5, reference numeral 1 is a manhole installed in the ground, which is a box-shaped body 2 made of concrete, a manhole cover 3 made of cast iron on the surface of the earth, and a body 2 for supporting the manhole cover 3. It has a receiving seat 4 made of cast iron provided at the upper end. The main body 2 has a side wall 5 and a bottom wall 6, and a connecting pipe 7 is connected to the side wall 5.

FIG. 1 and FIG. 2 show an example of a joint structure of a side wall 5 and a connecting pipe 7 according to the present invention. As shown in the drawing, an annular groove 8 having a predetermined width is formed on the outer periphery of the tip portion of the connecting pipe 7, and a flange-shaped ring 9 that is circumferentially divided is fitted in the annular groove 8. . A slit 10 is formed in a divided portion of the ring 9, and brackets 13 are attached to both side surfaces of both divided end portions 11 and 12 forming the slit 10. Then, between the brackets 13 facing each other in the circumferential direction, these brackets 13 are brought close to each other to apply a reducing force to the ring 9, thereby tightening the ring 9 into the annular groove 8. It has been passed.

The tip portion of the connecting pipe 7 to which the ring 9 is attached in this way is embedded inside the side wall 5 as shown in the drawing, and the opening 15 at the end portion of the connecting pipe 7 is inside the manhole 1. Is in communication with.

With such a configuration, at the time of piping work, by fitting the ring 9 from the tip of the connecting pipe 7 to fit the ring 9 in the annular groove 8 and tightening the bolts and nuts 14. The ring 9 is fixed in the annular groove 8. Then, concrete is cast around this portion so that this portion is embedded in the side wall 5 of the manhole 1.

As a result, the connection between the manhole 1 and the connecting pipe 7 is completed, but the flange-shaped ring 9 fitted and fixed in the annular groove 8 of the connecting pipe 7 ensures reliable connection. . In addition, the ring 9 is fixed to the connecting pipe 7 by a simple construction that only tightens the bolts and nuts 14, so there is no need to fix it by a labor-intensive work such as welding, and welding work at a piping site is unnecessary. There are advantages. Moreover, when adjusting the dimensions at the construction site, it is only necessary to cut the connecting pipe 7 into a required length and cut the annular groove 8 to perform the work easily.

FIG. 3 and FIG. 4 show another example of the connecting structure of the side wall 5 and the connecting pipe 7 according to the present invention. Here, brackets 13 are attached to the outer peripheral surfaces of the split ends 11 and 12 of the ring 9, respectively, and bolts and nuts 14 are provided between the brackets 13. With such a configuration, the number of fastening parts for fixing the ring 9 can be reduced by half as compared with the case of FIGS. 1 and 2.

[0013]

[Effect of device]

 As described above, according to the present invention, the manhole has a simple structure in which the ring is fitted to the outer periphery of the end portion of the connecting pipe and fixed, and then that portion is embedded in the manhole wall. Can be reliably engaged with the connecting pipe, and even if the connecting pipe is cut for adjustment, it is just like fitting the ring on the cutting pipe and fixing it. You can make a deal without needing to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a joint structure of a manhole and a connecting pipe according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the portion shown in FIG.

FIG. 3 is a cross-sectional view showing a joint structure of a manhole and a connecting pipe according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of the portion shown in FIG.

FIG. 5 is a cross-sectional view showing the overall structure of the manhole.

[Explanation of symbols]

 1 Manhole 5 Side wall 7 Connection pipe 9 Ring 14 Bolt / nut

Claims (1)

[Scope of utility model registration request] 1. A flange-shaped ring divided in the circumferential direction is externally fitted and fixed to the outer periphery of the end portion of the connecting pipe connected to the manhole, and the end portion of the connecting pipe including the ring is fixed to the wall of the manhole. It is a joint structure of a manhole and connecting pipe, which is characterized by being embedded in.