JPH0735192Y2 - Branch connection pipe fitting for ribbed pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a ribbed pipe branch connection pipe joint for connecting a branch pipe to a peripheral wall of a ribbed pipe having a large number of annular ribs on its outer peripheral surface.

(Prior Art) Conventionally, as a branch connection pipe joint of this type, for example, JP-A-
The one as seen in 60-151411 is known.

In this pipe joint, as shown in FIG. 21, a branch hole b is bored in a peripheral wall of a ribbed pipe a, and a base end portion of a branch pipe connecting portion c is inserted into the branch hole b and the base end portion is inserted. Of the ribs a of the ribbed pipe a. The saddle portion d protrudingly provided on the outer periphery of the ribbed pipe a is applied to the outer peripheral surface of the ribbed pipe a.
It is fitted in between and joined, thereby preventing a gap from being formed between the joint surface of the saddle portion d and the outer peripheral surface of the ribbed pipe a, and the branch connection pipe joint is firmly connected to the ribbed pipe. It is intended to be. Then, usually, a joining agent is applied between the joint surface of the saddle part d and the outer peripheral surface of the ribbed pipe a, or a number wire is wound from the outer peripheral surface of the saddle part d to strengthen the joint between them. It was

(Problems to be solved by the invention) However, in the above-mentioned branch connection pipe joint, the projections e protruding from the joint surface of the saddle part d and the shape of each rib f of the ribbed pipe a are completely formed. If the protrusions e are not formed so as to match the shape of each rib f, the outer peripheral surface of the ribbed tube a and the joint surface of the saddle portion d do not follow well, and therefore the adhesion between the two However, there was an inconvenience that the water level was lowered and the water stopping was incomplete. Further, even if the projections e ... Are formed in accordance with the shape of each rib f, the shape of the joint surface becomes complicated, which causes a problem that the manufacturing cost increases.

Further, if mud, sand, or the like adheres between the ribs f, the joint surface of the saddle portion d is lifted up, and it may not follow the outer peripheral surface of the ribbed pipe a.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a branch connection pipe joint for a ribbed pipe that can easily come into close contact with the ribbed pipe to obtain reliable water stoppage.

(Means for Solving the Problems) A branch connecting pipe joint for a pipe with ribs of the present invention is a pipe joint for connecting a branch pipe to a peripheral wall of a ribbed pipe having a large number of annular ribs on an outer peripheral surface, On the outer surface of the saddle portion that is curved so as to substantially follow the outer circumference of the rib of the attached pipe, a branch pipe connection portion that receives the end portion of the branch pipe is projected, and on the inner surface of the saddle portion, the diameter of the branch pipe connection portion The base end of the elastic tightening band, which is wide and is wound around the ribbed tube and press-contacts the entire circumference of the rib, is fixed, and the free end of this elastic tightening band is fixed to the saddle part. It is adapted to be locked at a proper place on the outer periphery by a locking means.

(Operation) The fixing to the ribbed pipe is performed by winding the free end side of the tightening band around the entire circumference of the ribbed pipe and pulling the free end of this tightening band to fix the free end to the outer surface of the saddle part. This is done by locking in place with locking means. At this time, since the tightening band has elasticity, tension is applied by pulling the tightening band, and this tension tightens the ribbed tube. At the same time, since the tightening band is pressed by the tension and adheres to the rib surface, the bonding surface between the saddle part and the ribbed tube and the outer peripheral part surrounding it are substantially sealed, increasing the sealing property. .

(Embodiment) [First Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a branch connection pipe joint for a pipe with ribs (hereinafter, simply referred to as pipe joint) 1 according to the present invention, FIG. 2 is the same front view, FIG. 3 is the same bottom view, and FIG. It is the same side view.

The pipe joint 1 includes a saddle portion 2 made of synthetic resin which is curved so as to substantially follow the outer circumference of the rib R of a ribbed pipe P (see FIG. 5), and a synthetic resin projecting from the outer surface of the saddle portion 2. And a elastic band 4 which is fixed to the inner surface of the saddle part 2 and is wound around the outer periphery of the rib R of the ribbed pipe P.

Although the saddle portion 2 is curved so as to substantially follow the outer circumference of the rib R as described above, the saddle portion 2 is in close contact with the rib R, and the rib R
It is desirable that the inner diameter of the rib R be the same as or slightly smaller than the outer diameter of the rib R so that water can be reliably stopped at the outer periphery. Also, this saddle part 2
As shown in FIGS. 1 and 2, hook-shaped engaging pieces 21, 21 are provided on the surface of the protrusion. These locking pieces 21, 21 are
It is provided at a position corresponding to the locking portions 41, 41 of the tightening band 4 described later.

The branch pipe connecting portion 3 is, as shown in FIGS. 1 to 4,
Socket part 31 whose one end receives the end of a branch pipe (not shown)
On the other hand, it is a short tubular shape in which the other end peripheral edge is formed in an arc shape having a curvature substantially equal to the inner diameter of the ribbed pipe P. The branch pipe connecting portion 3 thus configured is inserted and fixed in the opening 22 formed in the substantially central portion of the saddle portion 2. In addition, in the present embodiment, the branch pipe connecting portion 3 is formed separately from the saddle portion 2 and is inserted and fixed in the opening 22 of the saddle portion 2. However, it may be formed integrally with the saddle portion 2. Good.

As shown in FIG. 1 to FIG. 4, the tightening band 4 has two parallel ridges 42, 42 and both ridges 42, 42 except for both ends thereof. The belt-shaped portion 43 stretched between the 42 and the elastic member such as rubber, elastomer or soft plastic is integrally molded into a belt-shaped portion. That is, at both ends of the elastic band 4, the ridge portions 42, 42 are in a protruding state. Among the ridges 42, 42 protruding from both ends of the tightening band 4, the ridges 42, 42 on the free end side are provided with grooves 41a, 41a which can be engaged with the engaging pieces 21, 21, respectively. Is formed, whereby the ridge portions 42, 42 are configured as the locking portion 41. In addition, the ridges 42, 42 on the base end side are
Taper-shaped inclined surfaces 44a, 44a are formed so as to be smoothly wound around the ribbed pipe P, whereby the protrusions 42, 42 are configured as joint margins 44, 44.

Then, the tightening band 4 is fixed to the inner surface of the saddle part 2 such that only the joining margins 44, 44 extend from one of the side edge portions along the circumferential direction of the saddle part 2. Also,
The band 4 of the tightening band 4 is cut out so that the fixing surface of the tightening band 4 does not block the branch pipe connecting portion 3 when the tightening band 4 is fixed to the inner surface of the saddle portion 2. There is.

The tightening band 4 is not limited to the one formed integrally with only the elastic member, and the end portion of the tightening band 4 may be reinforced with a metal wire or other high-strength material.

The width of the ribs 42, 42 is substantially equal to or narrower than the interval between the ribs R of the ribbed pipe P, and the length of the ribs 42, 42 is the ribbed pipe P. Has a winding length around the entire circumference of. Further, since the thickness of the ridges 42, 42 is pressed by the tightening, it is preferable that the thickness is about 1.2 times the depth of the groove between the ribs R. Further, the interval between the ridges 42, 42 is longer than the diameter of the opening 22 so that the opening 22 of the saddle portion 2 is located between the ridges 42, 42.

Further, the strip-shaped portion 43 is a strip-shaped sheet having a thickness of about 2 to 5 mm, and the end portion on the side of the locking portion 41 has an adhesive portion 42a.
Is formed. The adhesive portion 42a has substantially the same thickness as the ridge portions 42, 42.

Next, a construction procedure of the pipe joint 1 described above will be described.

First, at a predetermined position of the ribbed pipe P, as shown in FIG.
A branch hole A having a diameter corresponding to the branch pipe connecting portion 3 of the pipe joint 1 is formed.

Subsequently, while aligning the branch hole A of the ribbed pipe P with the branch pipe connecting portion 3 of the pipe joint 1, the ribs R are attached to the ribs 42, 42 of the tightening band 4.
It is fitted in between and wound around the outer peripheral surface of the ribbed pipe P while pulling the locking portions 41, 41 of the elastic band 4. Then, the locking parts 41, 41 of the tightening band 4 are locked to the locking pieces 21, 21 of the saddle part 2, and the inner surface of the saddle part 2 is pressure-bonded to the outer circumference of the rib R or adhered via an adhesive. Is completed (see FIGS. 6 to 10). At this time, an adhesive is applied to the adhesive portion 42a of the elastic band 4 and the adhesive portion 42a is adhered to the surface of the saddle portion 2 to strengthen the bond between the elastic band 4 and the saddle portion 2. be able to. As a result, the saddle portion 2 is firmly attached to the ribbed pipe P by the tension of the elastic band 4. Further, the ridges 42, 42 of the tightening band 4 are pressed by the tension and fitted between the ribs R, and the overlapping portion of the tightening band 4 is smoothly wound by the joint margins 44, 44, and Since the strip-like portion 43 of the strip 4 is in close contact with the surface of the rib R, the close contact surface between the saddle portion 2 and the ribbed pipe P and the outer peripheral portion surrounding it are substantially sealed, and the sealing property is improved.

[Second Embodiment] This embodiment is shown in FIGS. 11 to 20, wherein FIG. 11 is a plan view of the pipe joint 1, FIG. 12 is the same front view, FIG. 13 is the same bottom view, and FIG. The same side view, FIG. 15 is a front view showing a construction procedure, FIG. 16 is the same side view, FIG. 17 is a front view showing a state after construction, FIG. 18 is the same side view, and FIG. 19 is FIG. III-III line sectional view in
20 is a sectional view taken along line IV-IV in FIG.

In this example, only the shape of the tightening band 4 is different from that of the above-described first example, and therefore only the difference will be described here, and the other description will be omitted. The same components as those of the first embodiment are designated by the same reference numerals.

In the tightening band 4 in this example, the ridge portions 42, 42 and the adhesive portion 42a having the same thickness as the ridge portions 42, 42 are removed to form only the band portion 43. By using only the strip-like portion 43 in this way,
The tightening band 4 adheres to the entire surface of the rib of the ribbed pipe P,
The tension applied to the tightening band 4 can be equalized as compared with that of the first embodiment.

(Effects of the Invention) As described above, according to the present invention, the ribbed tube is tightened by the tension acting on the tightening band, and at the same time, the tightness between the saddle portion and the ribbed tube and the outer circumference surrounding the saddle portion Since the sealing property can be increased by keeping the portion substantially sealed, a reliable water blocking effect can be obtained. Further, since the saddle portion is fixed by the tightening band, it is possible to easily carry out the mounting work without the need for winding wire or the like for bonding the saddle portion as in the conventional case.

[Brief description of drawings]

1 to 10 show a first embodiment of a ribbed pipe branch connection pipe joint according to the present invention, FIG. 1 is a plan view showing the ribbed pipe branch connection pipe joint, and FIG. 2 is a front view of the same. FIG. 3 is a bottom view of the same, FIG. 4 is a side view of the same, FIG. 5 is a front view showing a construction procedure, FIG. 6 is a side view of the same, and FIG. 7 is a front view showing a state after construction. 8 is the same side view, and FIG. 9 is I in FIG.
-I line sectional view, Fig. 10 is a II-II line sectional view in Fig. 8, and Figs. 11 to 20 show a second embodiment of the branch connection pipe joint for a ribbed pipe according to the present invention. Figure is a plan view of the pipe joint, Figure 12 is the same front view, Figure 13 is the same bottom view, Figure 14 is the same side view, Figure 15 is a front view showing the construction procedure, and Figure 16 is the same side view. FIG. 17 is a front view showing a state after construction, FIG. 18 is a side view of the same, FIG. 19 is a sectional view taken along line III-III in FIG.
20 is a sectional view taken along line IV-IV in FIG. 18, and FIG. 21 is a sectional view showing a conventional example. 1 …… Branch connection pipe joint for ribbed pipe 2 …… Saddle part 21 …… Locking piece 3 …… Spring pipe connection part 4 …… Tightening band 41 …… Locking part 44 …… Joining margin R …… Rib P …… Ribbed tube

Claims (1)

[Scope of utility model registration request] 1. A pipe joint for connecting a branch pipe to a peripheral wall of a ribbed pipe having a large number of annular ribs on an outer peripheral surface, the saddle part being curved so as to substantially follow the rib outer periphery of the ribbed pipe. A branch pipe connecting portion that receives the end portion of the branch pipe is projected on the outer surface, and the inner surface of the saddle portion is wider than the diameter of the branch pipe connecting portion and is wound around the ribbed pipe so that the entire rib outer circumference is formed. The base end of the elastic band which is pressed against the circumference is fixed, and the free end of the elastic band is locked by the locking means at a proper position on the outer circumference of the saddle. Branch connection pipe joint for pipes with ribs.