JPH0638957Y2 - Fume pipe joint structure for propulsion - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a joint structure of a fume pipe used as a propulsion pipe in civil works such as water supply and sewerage.

[Prior Art] This type of propulsion pipe includes standard type pipes, medium-press type pipes, embedded collar type standard pipes, etc. The former two of the above three types are connected by a color joint separate from the pipe. Is configured to
In the latter, the color joint is pre-installed integrally on the pipe end,
The other end of the pipe connected to this is connected by being fitted into the collar joint.

The conventional joint structure, in the case of the embedded collar type standard pipe, is connected to the inside of the cylindrical collar joint 2 embedded in one end of the fume pipe 1 as shown in FIG. It has a structure in which the small-diameter other end 3 of the tube 1 is fitted through a rubber ring.

However, in this one side embedded collar type, one side of the collar is formed integrally with the pipe so that watertightness is secured, but the other side to be connected is to be inserted and connected at the site. Therefore, there is a drawback that water will inevitably leak from the connection portion due to the turning of the rubber ring during construction.

Therefore, in the joint structure of standard type pipes and medium-press type pipes,
Japanese Utility Model Publication No. 57-147479 and Japanese Utility Model Publication No. 44-3029 shown in FIG.
As disclosed in Japanese Patent Publication No. 4, a through hole 4 is bored at the end of the pipe, that is, a stepped portion 2 formed at both ends of the propulsion pipe 1 is provided with tapered recesses 3 toward both ends. , The recess 3
It has been proposed to fit a rubber ring 5 therein, and then insert a joining ring 6 made of steel, and inject mortar 7 into the joining ring 6.

However, all of the above-mentioned devices have the problems that the quality is not preferable because the through hole 4 is opened in the tube body 1, and the product itself is special and cannot be diverted to another.

As a solution to such a problem, there is a device disclosed in Japanese Utility Model Publication No. 56-1031 as shown in FIG. This is because when the step portion 2 is provided at the end of the fume tube 1, the propulsion fume tube 1 in which two circumferential grooves 3 and 4 are provided at predetermined positions of the step portion 2 at a distance from each other, Gaskets 5 and 6 with different cross-section compressibility and hardness that fit into the circumferential grooves 3 and 4, and the circumferential grooves 3 and 4
And a cylindrical collar 7 which is inserted into the step portion 2 of the fume tube 1 via a partition wall 7b. The through hole 7a of the cylindrical collar 7 is formed from the through hole 7a. Gasket
The water blocking filler is injected into the gap 8 formed between the five and six.

[Problems to be solved by the invention]

However, as in the invention disclosed in Japanese Utility Model Publication No. 56-1031, it is not possible to perform the work of injecting the water blocking filler from the outside of the propulsion fume pipe 1 through the through hole 7a of the cylindrical collar 7 into the inside. However, it is almost impossible in actual construction.

The present invention has been made in order to solve various problems of the above-described conventional joint structure, and its gist is the end face of the fume pipe on the embedded collar joint side and the embedded collar joint. The end face of the fume pipe fitted inside by packing is butted against the end face of the fume pipe through an annular cushion material having a plurality of slits, and surrounded by both ends of the fume pipe, embedded collar joint, packing and cushion material. The joint structure of the propulsion fume pipe is characterized in that the waterproofing agent is injected into the gap formed from the cut portion.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is an exploded perspective view showing a joint structure of a propulsion fume pipe according to the present invention, FIG. 2 is a vertical cross-sectional side view of the joint structure, and FIG. 3 is a cushion member which is a constituent member of the joint structure in color. FIGS. 4 (A), (B), (C), and (D) are front views of a state in which the fitting is mounted on the joint side, and FIGS.

In the figure, reference numeral 1 is a propulsion fume tube having an embedded collar joint 2 at one end, and the other end 3 of the fume tube 1 is provided with two step portions 3a and 3b to obtain an outer diameter of the fume tube 1. A smaller diameter medium diameter portion 4a and a smaller diameter portion 4b are respectively formed.

The outer diameter of the embedded collar joint 2 is approximately equal to the outer diameter of the fume tube 1, and the inner diameter is formed slightly larger than the outer diameter of the middle diameter portion 4a of the fume tube 1. In addition,
In the figure, 1a is an end surface of the small diameter portion 4b of the fume tube 1, and 1b is an end surface of the fume tube 1 on the embedded collar joint 2 side.

5 is a water-proof packing made of rubber, which is fitted to the small-diameter portion 4b of the fume pipe 1 and retains the water-stopping effect when the medium-diameter portion 4a and the small-diameter portion 4b are inserted into the collar joint 2. It is for doing.

Reference numeral 6 denotes an annular cushion material formed of wood or a hard synthetic rubber agent, which is divided into four arc-shaped members 6a to 6d by a slit portion 7, and a double-sided adhesive tape (not shown) adhered to one side surface thereof. Due to this, the overall shape is retained in a ring shape, the outer diameter of which is approximately equal to the outer diameter of the small diameter portion 4b, and the inner diameter is formed slightly larger than the inner diameter of the fume tube 1. The cushion material 6 may be separated into arcuate members 6a to 6d.

Therefore, when connecting the pair of fume tubes 1 and 1, a release paper (not shown) is peeled off from one side surface of the cushion material 6 and the end surface 1a or 1b of either one of the fume tubes 1 is removed.
Adhere and fix to.

Next, release paper (not shown) from the other side of the cushion material 6
After peeling off, the water blocking packing 5 is fitted on the outside of the small diameter portion 4b of the fume pipe 1 to be connected, and the medium diameter portion 4a and the small diameter portion are
When 4b is pushed into the collar joint 2 of the other fume tube 1, the other side surface of the cushion material 6 is bonded to the other end surface 1b or 1a of the fume tube 1, and both end surfaces 1 of the fume tubes 1 and 1 are bonded.
When a and 1b are butted against each other via the bonded cushion material 6, the watertightness of the joint portion is further secured by the water blocking packing 5.

If water leaks from the joints of the fume pipes 1 or 1 during the propulsion work or after the completion of the propulsion work, or if there is a concern about the water leak, FIG. 4 (A) (B)
(C) (D) As shown in FIG.
From the end face 1b of the fume tube 1, the small diameter portion 4b, the cushion material 6,
A water stop agent 9 is injected into a space 8 surrounded by the water stop packing 5 and the collar joint 2.

That is, first, as shown in FIG. 4 (A), among the slits 7 of the cushion material 6, the slits 7 located at the bottom or slightly above the bottom are provided on the pipe 10 from the inner peripheral surface 6a side of the cushion material 6. Insert one end of.

Then, as shown in FIG. 3B, after filling the joint material 12 into the joint portion 11 excluding the portion corresponding to the uppermost cut portion 7, the pipe 10 is expanded into the gap 8 at a low expansion rate. Inject the mold waterproofing agent 9.

Then, as shown in FIG. 4 (C), the gap 8 is sequentially filled from the lower side to the upper side by the waterproofing agent 9. At this time, the slit portion 7 located at the uppermost side is vented to prevent the waterproofing agent. The entire gap 8 is filled with the water blocking agent 9 without air being mixed into the space 9.

Then, the filling state of the waterproofing agent 9 is confirmed through the upper cut portion 7, and when the filling is completed, the pipe 10 is pulled out from the cut portion 7, and as shown in FIG.
Finish with 12. As the joint material 12, a quick-setting cement, a sealing material or the like is used, and as the water blocking agent 14, a low expansion type water blocking agent (W conquer) is used.

In the above embodiment, as the cushion member 6, four arc-shaped members 6a to 6d are formed by adhesive tapes.
Although it has been described that the cut portion 7 is provided between 6d to 6d to form a ring shape, it is of course possible to use the arcuate members 6a to 6d separated from each other. In this case, By setting the cut width of the cut portion 7 to be large, the water blocking agent 9 of high clay can also be injected.

[Effect of device]

As described above, the joint structure of the fume pipe for propulsion according to the present invention comprises: It is configured to butt through an annular cushion material having a plurality of slits, and to inject the waterproofing agent from the slits into a gap surrounded by both ends of the fume tube, the embedded collar joint, the packing and the cushion. Therefore, if the water blocking effect of the joint is improved, the quality is not deteriorated because the fume tube is not processed such as boring.

Also, since the cushion material has a plurality of slits, it is possible to inject the waterproofing agent from the inside of the fume tube through the slits in the cushion material, which makes the work easier. Since the cushion material is arranged between the end surfaces of the fume tube, the propulsive load can be evenly distributed, and there are various effects that the tube end portion of the fume tube is not damaged during the propulsion work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a joint structure of a propulsion fume pipe according to the present invention, FIG. 2 is a vertical sectional side view of the joint structure, and FIG.
The figure is a front view of a state in which a cushion material, which is a component of the joint structure, is mounted on the collar joint side, and FIGS. 4 (A) and 4 (B).
(C) and (D) are explanatory views showing a water blocking agent filling method in the joint structure, and FIGS. 5 to 7 are vertical sectional views showing a main part of a conventional propulsion fume pipe. 1 ... Hume pipe, 1a, 1b ... end face of pipe, 2 ... embedded collar joint, 5 ... waterproof packing, 6 ... cushion material, 6e ... inner peripheral surface, 7 ... cut portion, 8 ... Gap, 9
…… Waterstop, 11 …… Joint, 12 …… Joint material.

Claims (1)

[Scope of utility model registration request] 1. An end face of a fume tube on the side of a buried collar joint,
The end surface of the fume tube fitted into the embedded collar joint via packing is butted against the end surface of the fume tube through an annular cushion material having a plurality of cut portions, and both ends of the fume tube and the embedded collar joint and packing and A joint structure for a propulsion fume pipe, characterized in that a water blocking agent is injected into the gap surrounded by a cushion material from the cut portion.