JP2689243B2 - Manhole and pipe connecting method and connecting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting method and a connecting device for connecting a medium-diameter conduit end for accommodating a communication cable and the like to a manhole.

[0002]

2. Description of the Related Art The first method for connecting a conventional medium diameter conduit to a manhole M is to dispose cables in the manhole M as shown in FIG. For connecting to the inner diameter pipe line 9, the inner end of the plurality of inner pipes 14 and the cylindrical connecting pipe protruding and fixed to the outside of the inner diameter pipe line 9 by welding or the like. 30 is fixed to the manhole side wall 10 with protective concrete 12.

In the second method, as shown in FIG. 4, a mandrel side wall 10 is provided with a cylindrical joint 15 having a large size on the side of the manhole side wall 9 and a size of the medium diameter conduit 9 on the side of the manhole side wall 10. Insert it and fix it to the manhole side wall 10 with protective concrete 12, arrange an elastic body or sealing material 5 near the insertion port of the medium diameter pipe 9 of the cylindrical joint 15 and insert the medium diameter pipe 9 to connect To do.

In the third method, as shown in FIG. 5, the manhole side wall 10 side is a box type having a rectangular cross section, and the side into which the medium diameter conduit 9 is inserted is a cylindrical box type joint 16.
The box type joint 16 is provided with a manhole side wall 1
Insert the box-shaped part into 0 and fix it to the side wall with concrete as in the first and second methods.
Then, an elastic body or a sealing material 5 is provided on the cylindrical portion to insert and connect the medium diameter pipe line 9.

SUMMARY OF THE INVENTION The conventional method is as described above for assembling a formwork for concrete,
There is a drawback in that the construction period becomes long and the release of traffic is delayed because the complicated work of concrete pouring and the time required for the concrete to set. Also, manhole M and inner tube 1
4, cylindrical type joint 15, box type joint 16
The water blocking property for preventing water from entering through the gaps G1 and G2 at the connection portion with is often owed to the skill of the worker of the protective concrete 12, and there is a problem in securing stable water blocking.

Further, when connecting the cylindrical type joint 15 or the box type joint 16 to an existing manhole,
Since it was necessary to open the existing manhole side wall more than the diameter of the joint to be attached, there were drawbacks that the manhole needed to be reinforced strongly and that the work space for opening was required to be large. In addition, there is a problem that the shaping work after mounting becomes complicated. An object of the present invention is to provide a connection method and a connection device that eliminate the complicated work of solidifying the connection portion between the manhole and the medium-diameter pipe with protective concrete, make the construction easy and short-term, and improve the water stopping property. To do.

[0007]

A method for connecting a manhole and a pipe according to the present invention comprises a first step of closely inserting a cylindrical connecting attachment into a cylindrical joint so that the total length of both is minimized. A second step of carrying in, a third step of grasping the stopper of the cylindrical connecting attachment and inserting the connecting portion at the right end of the cylindrical connecting attachment into the annular step portion at the left end of the medium diameter pipe line for connection, and A cylindrical joint in which an annular mounting collar having an elastic body or a sealing material housed in an annular groove is integrally provided at one end of a cylindrical body is a sliding connection with a cylindrical connecting attachment, and the aforementioned annular collar for mounting is provided with an opening required in advance. And a fourth step of attaching the mounting annular collar portion to the side wall of the manhole with bolts. The connecting device of the present invention is a cylindrical joint that has an annular groove for attachment in which an elastic body or a sealing material is housed in an annular groove at one end of a cylindrical body, and a cylindrical joint that houses an elastic body by providing a groove on the inner peripheral surface of the other end. A stopper is provided on the outer peripheral surface of the cylindrical body, and a cylindrical connection attachment with the right side of the stopper as the insertion portion is provided, and one end of the cylindrical body of the cylindrical connection attachment is slid and inserted into the cylindrical body of the cylindrical joint. The connecting member is configured to constitute the connecting member, and the connecting member is disposed between the side wall provided with the opening in advance and the medium diameter pipe line buried in the excavation groove, and the inserting portion of the cylindrical body of the cylindrical connecting attachment is described above. It was inserted into the annular step of the medium diameter pipe, while the annular flange of the cylindrical joint was tightly joined at the surface where the elastic body or the sealing material was housed in the annular groove, and the side wall was attached by bolts to connect it. It is.

Action The present invention uses the cylindrical joint and the cylindrical connecting attachment of the present invention, so that a formwork for concrete is not required, the water stopping property of the connecting portion is improved, and the skill of hitting the protective concrete is improved. do not need. Connection work will be simple and the construction period will be shortened. Further, it is not necessary to reinforce the strength of the manhole.

[0009]

1 is a sectional view of an embodiment of a connecting device of the present invention, and FIG. 2 is a perspective view of a part of FIG. In the figure,
The same reference numerals as those in FIGS. 3, 4 and 5 indicate the same members and the same parts. 1 and 2, 1 is a cylindrical joint, 2 is a cylindrical connection attachment, 3 is an annular flange portion for mounting a cylindrical joint, 3-2 is a bolt hole, 4 is an elastic body or sealing material, and 5 is elastic. Ring , 6 is bolt,
Reference numeral 7 is a weight portion of the cylindrical joint and the cylindrical connection attachment, 8 is a cylindrical connection attachment insertion portion, 9 is a medium diameter pipe line, 10 is a side wall of a manhole, and 11 is a stopper.

The cylindrical joint 1 has an annular mounting flange 3 integrally formed at one end of the cylindrical body, and has an annular groove 1-1 near the inlet for inserting the cylindrical connecting attachment 2 on the inner peripheral side surface of the cylindrical body. And the annular elastic body 5 having a semicircular cross section is housed in the groove 1-1 with the protruding portion facing outward, and the mounting flange portion 3 is provided with the annular groove 3-1. An elastic body having a rectangular cross section or a sealing material 4 is housed therein, and a bolt hole 3-2 for mounting is provided on the same inner circumference. The size of the cylindrical body of the cylindrical connection attachment 2 is such that one end has an outer diameter that can be inserted into the cylindrical joint and the other end has an outer diameter that can be inserted into the annular step portion of the middle-diameter pipe 9, and an annular shape on the outer peripheral surface near the other end. The stopper 11 is integrally provided.

The connection method of the present invention will be described. The first step of closely inserting the cylindrical connecting attachment 2 into the cylindrical joint 1 so that the total length of the two is the minimum length, the second step of bringing the cylindrical connecting attachment 2 into the excavation groove, and the ring-shaped stopper 11 of the cylindrical connecting attachment 2. And the third step of connecting by inserting the insertion portion 8 at the right end of the cylindrical connection attachment 2 into the annular stepped portion 9-1 at the left end of the medium diameter conduit 9, and the cylindrical joint 1 By sliding with the mold connection attachment 2, the mounting annular collar portion 3 is joined to the side wall 10 of the manhole M provided with a necessary opening portion on the surface of the sealing material, and the bolt hole 3 formed in the mounting collar portion 3 The fourth step is to insert the bolt 6 into 2 and attach it to the manhole side wall 10.

Since the elastic member or the sealing material 4 is attached to the mounting flange portion 3 of the cylindrical joint, the infiltration of water from between the side wall 10 of the manhole and the cylindrical joint 1 results in the elastic body or the sealing material. Prevented by 4. Further, when the diameter of the medium diameter conduit 9 is different, by changing the type so as to have a right end portion which makes the mouth connected to the middle diameter conduit of the cylindrical connection attachment 2 different, various sizes can be obtained. It can also be used for medium diameter pipes.

According to the connection method of the present invention, the cylindrical joint 1 and the cylindrical connection attachment 2 are carried into the excavation groove with a minimum length, and various types of medium diameter conduits are also connected. Since it can be handled by changing, the workability is good, and since it can be easily attached to the manhole with bolts and the complicated work of protective concrete is eliminated, skill is not required compared with the conventional method. The stable water stop can be secured, the construction period can be shortened, and it is economically advantageous. The stopper 11 may have a rod shape other than the ring shape shown in FIG.

In the connecting device of the present invention, the cylindrical joint and the cylindrical connecting attachment are each formed of a cylindrical body, and the cylindrical body of the cylindrical connecting attachment is connected to the cylindrical body of the cylindrical connecting attachment. It is configured so that it can be inserted tightly through the elastic ring housed in the groove on the peripheral surface and slidably coupled, and at one end of the cylindrical body of the cylindrical joint, there is an attachment connecting brim that houses the elastic body or sealing material in the annular groove. The cylindrical body of the cylindrical connection attachment is made by integrally connecting one end of the cylindrical body of the cylindrical connection attachment with the elastic ring to the portion where the elastic ring is provided in the groove on the inner peripheral surface of the cylindrical joint of the cylindrical joint. A stopper is formed on the outer peripheral surface of the other end of the, and the part on the right side of the stopper is the insertion part, and the insertion part is inserted into the annular step of the medium-diameter pipe line and connected. The only connection flange portion for connecting the elastic body or medium caliber pipe and the side wall of the manhole by the surface of the sealing member to tightly bind the joining bolt to the side wall of the manhole.

[0015]

According to the present invention, since the cylindrical joint having the above-mentioned structure and the cylindrical connection attachment are provided for connection, there is no protective concrete pouring work, so that the working environment on site can be improved. Since the time to assemble the formwork and to solidify the concrete is eliminated, the construction period can be shortened and early traffic can be released. Also, the period of noise and obstacles to the surrounding residents will be shortened.

Since the connecting device of the present invention comprises the above-mentioned components, it is possible to secure stable water shutoff of the connecting portion between the manhole and the medium-diameter conduit. Therefore, in a manhole that accommodates communication cables and the like, the effects of preventing rusting of metal objects in the manhole and reducing drainage work in the manhole are produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connection device for connecting a manhole and a medium diameter pipe according to the present invention.

FIG. 2 is a cross-sectional perspective view of the cylindrical joint and the cylindrical connection attachment of the present invention.

FIG. 3 is a cross-sectional view of a conventional connection device using protective concrete.

FIG. 4 is a cross-sectional view of a conventional connecting device using a cylindrical joint.

FIG. 5 is a cross-sectional view of a conventional box-type connecting device.

[Explanation of symbols]

 1 Cylindrical Joint 2 Cylindrical Connection Attachment 3 Ring Flange for Mounting 4 Elastic Body or Sealing Material 5 Elastic Ring 6 Bolt 7 Cylindrical Joint / Short Pipe Weight 8 Cylindrical Connection Attachment 9 Medium Diameter Pipeline 10 Manhole Side Wall 11 Stopper

Claims (2)

(57) [Claims] 1. A cylindrical type in which one end of a cylindrical body is integrally formed with an attachment connecting flange portion in which an elastic body or a sealing material is housed in an annular groove, and an elastic ring is housed in an inner peripheral surface groove of the other end. The first step of closely inserting the cylindrical body of the cylindrical connection attachment into the cylindrical body of the joint where the elastic ring of the joint is housed via the elastic ring, the combined cylindrical joint and cylindrical connection attachment in the excavation groove. The second step of carrying in, holding the stopper integrally configured on the outer peripheral surface of the cylindrical body of the cylindrical connection attachment and inserting the insertion portion of the cylindrical body of the cylindrical connection attachment into the annular step portion of the medium diameter to connect. Step 3, and slide the cylindrical joint with respect to the cylindrical connection attachment to house the mounting annular collar on the side wall of the manhole and the elastic body or sealing material in the annular groove. A method of connecting a manhole and a pipe, which comprises a fourth step of closely joining the surfaces and attaching them to the side wall of the manhole with a fixing member. 2. A cylindrical joint and a cylindrical body, wherein one end of the cylindrical body is integrally formed with an annular ring portion for mounting in which an elastic body or a sealing material is housed in an annular groove, and an elastic ring is housed in an inner peripheral surface groove of the other end. A stopper is provided on the outer peripheral surface of the cylindrical joint, and a cylindrical connection attachment having the right side of the stopper as a insertion portion is provided, and a cylindrical body of the cylindrical connection attachment is attached to a cylindrical body in which an elastic ring is housed in an inner peripheral groove of the cylindrical joint. One end of the is connected by sliding, it is tightly inserted through an elastic ring to form a connecting member, and the connecting member is arranged between the side wall provided with an opening in advance and the medium diameter conduit embedded in the excavation groove. The insertion portion of the cylindrical body of the cylindrical connection attachment is inserted into the annular step portion of the medium diameter pipe, while the annular flange portion of the cylindrical joint is housed in the annular groove for the elastic body or the sealing material. A connection device for connecting manholes and pipes that are tightly joined at the surface and are attached to the side wall with bolts.