JPS60200718A - Joint for wavy flexible tube - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a coupling used to connect corrugated flexible tubes to each other, and a coupling used to connect corrugated flexible tubes to each other. This invention relates to a joint for corrugated flexible pipes.

[Background technology]

Conventionally, there are joints for corrugated flexible pipes that have been generally used as shown in FIGS. 1(a), (b), and (c) and FIG. 2. Both are connectors. The joint shown in FIG. 1 has a cylindrical shape as a whole, with one end serving as a corrugated flexible tube connection part 1, and the other end serving as a box connection part 2. The connecting part l is divided into a distal end side and a proximal end side by sandwiching a groove 4 in the form of a notch, leaving a part of the whole part intact,
The ring at the tip end is partially opened 3 to form a flexible piece 1a whose diameter can be expanded or reduced. The flexible piece 1a expands when inserting the corrugated flexible tube to facilitate insertion, and contracts after insertion to tighten the flexible tube to prevent the flexible tube from coming off.

Tightening is performed by tightening the expelling portions 5a and 5b extending from both sides of the opening 3 of the mouth J flexible piece 1a with screws 8.

In the figure, 6 is a hole and 7 is a female threaded hole.A male thread (conduit thread) 9 is provided on the outer peripheral surface of the box connection portion 2.

@2 The joint shown in Figure 2 has two flexible pieces 1a at the corrugated flexible pipe connection part, and is designed to prevent the corrugated flexible pipe from being tightened at two places. It has the same structure as the one in Figure 1. In FIG. 2, the same numbers as in FIG. 1 refer to the same items.

The above-mentioned two-way joint had the following problems. That is, when the joint is embedded in concrete, there is a problem that fresh concrete (toro) may enter the inside through the opening 3 or the groove 4 and block the inside of the corrugated flexible pipe or the joint. Another problem is that when the joint is placed in a narrow space, it may not be possible to connect the corrugated flexible pipe because it is not possible to turn the tightening screw using a screwdriver.

[Purpose of the invention]

This invention was made in view of these circumstances,
Even when fittings are embedded in concrete,
The purpose of the present invention is to provide a joint for corrugated flexible pipes that can connect corrugated flexible pipes even when the joint is placed in a narrow space, without causing a small risk of fresh concrete entering the inside of the joint. It is said that

[Disclosure of the invention]

In order to achieve the above-mentioned object, the present invention
It includes a cylindrical connecting part connected to the flexible tube and a cylindrical tightening body externally fitted to the connecting part, and the connecting part has an outer circumferential surface that increases in diameter from the base to the tip. The clamping body has a tapered surface, and the peripheral wall is provided with a notch extending from the tip to the base, and the inner peripheral surface has a convex portion that fits into the corrugated recess on the outer peripheral surface of the flexible tube. A corrugated flexible pipe joint whose inner circumferential surface has a tapered surface that matches the tapered surface of the connecting portion, wherein one edge of the notch is provided with a cover that covers the notch. The gist of this invention is a corrugated flexible pipe joint that is characterized by the following characteristics. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The coupling according to the present invention consists of a cylindrical clamping body 12 (clamped by a sleeve) as shown in FIG. They each have two.

The connecting portion 10 has a tapered surface 10a whose outer peripheral surface increases in diameter from the base to the tip (insertion side), and at the tip i portion of the tapered surface 10a (near the position where the outer diameter is maximum),
The protrusions (protrusions) 10b extending along the circumferential direction are symmetrically arranged in two
Books provided. The protrusions 10b are used for fixing the fastening body, and the number thereof is not particularly limited. Four protrusions (protrusions) 10c for connecting the corrugated flexible tube extending along the circumferential direction are also provided at the tip of the inner surface of the connection part 1O, and the front wall has the diameter of the front part. L-shaped incisions lod and lOd' are provided so that the size can be changed. That is, the notch lod extends from the tip of the connecting portion IO toward the base, and another notch 10d' extends in the circumferential direction from the base side end. Cut l
'Q One edge of d has a covering (membrane) 13 that covers it.
is provided. Number of protrusions 10c and cut B H10d
The outer and inner circumferential surfaces of the two swords have an outward flange 14 and an inner circumferential surface. A flange (pipe stop) 15 is provided in each direction. The flange 14 serves as a flange for the clamping body 12, and the flange 15 serves as a means for positioning the corrugated flexible tube 16 inserted into the connecting portion 10. Tapered surface 10 of connecting portion 10
At the rear of a, there is a protrusion (
A convex portion) 17 is provided. The number of protrusions 17 is not particularly limited.

The tightening body 12 has an inner peripheral surface that is a tapered surface 12a that matches the tapered surface 10a of the connecting portion 10, and has a tapered surface 12a that matches the tapered surface 10a of the connecting portion 10.
2a is provided with a guide groove 12b extending in the axial direction and having a rear end open to the outside from the middle part to the rear part, and two grooves (four parts) 12c symmetrically extending in the opening direction at the tip part. It is provided. The protrusion 17 of the connection part 10 is inserted into the groove 12b, and the protrusion 10b of the connection part 10 is inserted into the groove 12c.

The groove 12c is deeper at one end and gradually becomes shallower at the other end, and the protrusion 17 guides the clamping body 12 so that the protrusion 10b is inserted deep into the groove 12c, and the clamping body 12 moves forward. When the protrusion 10b is inserted into the groove 12c, it is removed from the groove 12b.

Here, the groove 12c is provided so that the depth is the same from one end to a length slightly longer than the length of the protrusion 10b, and the remaining depth gradually becomes shallower as it approaches the other end, and finally the depth becomes 0. [See Figure 4 (a)].

On the outer peripheral surface of the tightening body 12, there is a non-slip 12 made of unevenness.
d is provided.

This joint is connected to the corrugated flexible tube in the following manner. First, in order to reduce or eliminate the insertion resistance of the corrugated flexible tube 16 by retracting the clamping body 12 like the clamping body 12 on the right side shown in FIG.
[7] The diameter of the tip of the connecting portion 10 is increased. At this time, the guide protrusion 17 is fitted into the groove 12b. Thereafter, the corrugated flexible tube 16f is inserted from the opening at the tip of the connecting portion 10. Since the connecting portion 10 is provided with the notches 10d and 10d', even if the corrugated flexible tube 16 is somewhat thick, it can be easily inserted. Next, like the tightening body 12 on the left side, the tightening body 1? (a) in Figure 6.
As shown in FIG. 1, the projection 10a of the connecting portion 10 is inserted deep into the groove 12c of the fastening body 12, and the diameter of the tip of the connecting portion 10 is made small. Then,
The protrusion 10c of the connecting portion IO is inserted into an uneven recess 16a formed on the outer peripheral surface of the corrugated flexible tube 16. At the same time, as seen on the left side of the joint in FIG. 5, the groove 12b of the clamping body is disengaged from the protrusion 17 of the joint, and the clamping body 12 becomes rotatable. b), the clamping body 12 is rotated (9 in this example).
0'), so that the protrusion 10& is inserted into the shallow part of the groove 12c. Then, the corrugated flexible tube 16 is connected to the connecting portion 1o.
The protrusion 10 of the connecting part 1o is tightly tightened by the front part of the
c is deeply inserted into the recess 16a of the corrugated flexible tube 16, and is firmly connected to the connecting portion IO.

At this time, the cut 10d is covered by the cover 13.

Ridge 1: () may be made so that the notch 10d is closed when the tightening body 12 is moved forward by increasing the width of the ridge 1: However, the notch 10 may be blocked.
It is not necessarily necessary that d be completely covered by the cover 13, and there may be some gap.

In this way, the connection operation of the corrugated flexible tube 16 is performed using the clamping body 12.
All you have to do is move it forward and then rotate it, so there is no need to use tools such as a screwdriver.

Therefore, even if the joint is placed in a narrow space, it will not become impossible to connect the flexible tube. 1, when the flexible tube is connected, the notch 1
Since the entire area 0d is covered with the clamping body 12, there is no fear that the inside of the joint or flexible pipe will be blocked even when the joint is embedded in concrete.

When connecting the connecting part 10 of the corrugated flexible tube 16i, rotate the clamping body 12 in the opposite direction to when connecting, and then move it back to tighten the entire diameter of the tip of the connecting part 10, and then release the connection. and pull out the corrugated flexible tube 16.

Note that the guide protrusion on the connecting portion and the guide groove on the tightening body are not necessarily required. Also, the cut l
Od' is not necessarily required. The protrusion for fixing the clamping body at the connection part and the groove of the clamping body into which it is inserted are not necessarily required, and the clamping body into which the protrusion for fixing the clamping body at the connection part is inserted is not necessarily required. The body groove does not necessarily have to be deep at one end and gradually become shallower as it approaches the other end. In other words, the depth may be constant. In such a case, the corrugated flexible tube is connected to the connecting portion by advancing the clamping body. Therefore, there is no need to use tools such as a screwdriver, so even if the joint is placed in a narrow space, it will not be impossible to connect the corrugated flexible pipe.

In the above embodiments, the case of a coupling has been described, but the present invention can be practiced with other types of joints.

FIG. 7 shows a cylindrical body of a connector which is another embodiment of the joint according to the present invention. This cylindrical main body 18 has one end serving as a connecting portion 10 of the corrugated flexible tube, and the other end serving as a connecting portion 19 of the box.

The structure of the connecting part 10 is the same as that of the aforementioned coupling, and the same fastening body arranged on the aforementioned coupling is externally fitted therein. The inner peripheral surface of the connecting portion 19 is provided with a female thread 20 that is screwed into a nipple or the like. In the figure, the same numbers as in FIG. 3 indicate the same things.

A corrugated flexible tube is connected to the connecting portion 19 of this connector in the same manner as the coupling, and this connector also provides the same effect as the coupling.

〔Effect of the invention〕

Since the corrugated flexible pipe joint according to the present invention is constructed as described above, even when it is embedded in concrete, there is little risk of fresh concrete getting into the inside of the joint, and when it is placed in a narrow place. However, it does not occur that it becomes impossible to connect the corrugated flexible tube.

[Brief explanation of the drawing]

6) in Figure 1 is a front view of a conventionally used joint, (b) is a partially cutaway side view of the joint, (c) is a bottom view of the joint, and Figure 2 is a conventional joint. FIG. 3(a) is a front view of the cylindrical body of one embodiment of the joint according to the present invention, and FIG. 3(b) is a longitudinal sectional view of the cylindrical body; 4(c) is a bottom view of the cylindrical body, FIG. 4(a) is a front view of the clamping body of the joint, FIG. 6(a) and 6(b) are explanatory views of the operation of the joint according to the present invention, and FIG. 7(a) is a longitudinal sectional view of the cylindrical body of another embodiment of the joint according to the present invention.
(b) is a bottom view of the cylindrical main body. 10... Cylindrical connection part 10a... Taber surface 10c.
・Protrusions (protrusions) for connecting corrugated flexible pipes 10d, lOd'・
... Notch 12 ... Tubular clamping body 12a ... Taber surface 13 ... Covering agent Patent attorney Takehiko Matsumoto (a) Figure 3 Figure 6 Figure 7

Claims (5)

[Claims] (1) A cylindrical connection part connected to the corrugated flexible tube is provided, and a cylindrical clamping body is externally fitted to the connection part, and the outer circumferential surface of the connection part extends from the base part to the tip end. The flexible tube has a tapered surface that increases in diameter toward the flexible tube, and the peripheral wall is provided with a notch extending from the tip to the base, and the inner peripheral surface has a convex portion that fits into the corrugated recess on the outer peripheral surface of the flexible tube, and on the other hand, The supply body is a corrugated flexible pipe joint whose inner circumferential surface has a tapered surface that matches the tapered surface of the connection portion, and one end edge of the cut has a cover that covers the cut. A joint for a corrugated flexible pipe, characterized in that it is provided with a corrugated flexible pipe. (2) The corrugated flexible pipe joint according to claim 1, wherein the notch also extends in the circumferential direction from the base side end. (3) A convex part for fixing the delivery body is provided on the tapered surface of the connection part, and a concave part is provided on the tapered surface of the clamping body, and when the clamping body is moved toward the tip of the connection part, the connection is made. The corrugated flexible pipe joint according to claim 1 or g62, wherein the convex part of the part is inserted into the concave part of the clamping body to prevent the supply body from retreating. (4) The corrugated flexible pipe joint according to claim 3, wherein the concave portion of the supply body is a groove that is deep at one end and gradually becomes shallower as it approaches the other end. (5) A convex portion is provided at the rear of the tapered connection portion to guide the movement of the clamping body, and the convex portion extends in the axial direction and is open at the rear end, and the convex portion serves as a guide for the connection portion. A kite groove is provided in which the part is inserted, and when the clamping body moves toward the tip of the connection part after moving onto the convex part that serves as a guide, the convex part for fixing the clamping body of the connection part is inserted into the clamping body. 5. The corrugated flexible pipe joint according to claim 4, which is adapted to be inserted deep into a groove.