JPH0743593Y2 - Hose bend prevention tube for water stop bag - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a bend preventing pipe for protecting a flexible hose of a bag for a water shutoff device for temporarily shutting off fluid in the pipe of a water pipe.

[0002]

2. Description of the Related Art Conventionally, as a water stop device and its bag, there are Japanese Laid-Open Patent Publication No. 3-177697 and Japanese Utility Model Laid-Open No. 4-22691 proposed by the inventors of the present application. There was such a problem. That is, FIG. 3 shows a usage state of the above-mentioned bag, and the bag insertion hole 2 formed in the pipe 21 from within the water blocking device 22 attached to the pipe 21 of the pipe line.
A bag 24 in a contracted state is arranged in the tube 21 through the tube 3.

Then, air or water is supplied to the bag 24 from a rubber hose 25 connected to the bag 24 so that the bag 2
By inflating 4, the water flow resistance of the bag 24 due to the pressure of the water flowing in the pipe 21 is increased, and the bag 24 is strongly pushed to the downstream side of the pipe 21, so that the hose 25 is bent and pulled strongly. Under the force, hose 25
At the boundary portion 27 with the mouthpiece 26 provided at the tip of the above, a sharp bend was generated and damaged, leading to cutting.

Although the bent end of the hose 25 is slightly guided by the enlarged end portion 28 of the mouthpiece 26, the enlarged end portion 2 of the hose 25 is guided.
Since the width of 8 is small, it does not have the effect of preventing damage to the hose 25, and merely serves as an insertion guide for the hose 25.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, when the water blocking bag is inflated in the pipe, the hose connected to the bag is abrupt at the boundary with the mouthpiece even if it is strongly pushed by the water pressure of the pipe. (EN) Provided is a hose bending prevention tube which prevents damage and cutting due to bending.

[0006]

Therefore, according to the present invention, a bag insertion hole provided in a pipe is attached to a mouthpiece for attaching and inserting the other end of a flexible hose connected to a water stopping device bag. It is used by arranging it so that it faces the inside of the pipe, and a locking step part that can seat the enlarged end part of the mouthpiece is provided around the inner circumference of the adhered tube part, and is also a thicker tube than the adhered tube part. And the inner peripheral surface of the concentric tubular portion is formed into a gently curved surface facing outward, and the inner peripheral end interval of the retaining step is greater than the outer diameter of the hose. The configuration is a little larger.

[0007]

[Function] When the enlarged step of the base is inserted into the locking step and the adhered tube is attached to the base by caulking etc., it is contracted into the pipe through the bag insertion hole drilled in the pipe of the pipe line. When the air is introduced from the hose into the bag and the bag is inflated by arranging the bag in Fig. 1 and exposing the tubular part inside the tube, the water flow resistance of the bag due to the pressure inside the tube increases and The hose is strongly pushed to the downstream side, so that the hose receives a strong bending force and a pulling force, but the hose is gently bent along the inner curved surface of the tubular portion, so that a sharp bend is prevented.

That is, there is play in the hose because the distance between the inner peripheral ends of the locking step portions, and hence the inlet of the tubular tubular portion is larger than the outer diameter of the hose, and the inner peripheral curved surface of the tubular tubular portion is the enlarged end of the mouthpiece. By continuing to the inclined inner peripheral surface of the portion, the bent portion of the hose gradually becomes longer, so that the hose can be prevented from being damaged.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiments of the present invention will be described in detail below. 1 and 2 show a state in which the hose bending prevention tube 6 of this example is used, and 1 is a waterproof bag, which has airtightness and flexibility of rubber or the like, and is provided with a mounting opening 2 at one end. And a flexible hose 3 such as rubber is connected. Hose 3
A base 4 is fitted to the other end of the base 4, and a connecting nut 5 is rotatably attached to the outer periphery of the base 4.

The hose bending prevention tube 6 of this embodiment is such that the adhered tube portion 6
1 and a scooping tubular portion 63 having a thicker wall than that, a locking step portion 62 around which the enlarged end portion 41 of the mouthpiece 4 can be seated is provided around the inner circumference of the seated tubular portion 61. The inner peripheral surface of the tubular portion 63 is formed into a gentle inner curved surface 64 that extends outward, and the inner peripheral end spacing of the locking step portion 62 is set to be slightly larger than the outer diameter of the hose 3, so that the hose inside the concentric tubular portion 63. 3 has play.

Then, the enlarged step portion 41 of the mouthpiece 4 is inserted into the locking step portion 62, and the adhered cylinder portion 61 is mounted on the mouthpiece 4 by caulking or the like. The bag 1 in a contracted state is arranged in the tube 8 through the bag insertion hole 10 formed in the tube 8 from the inside of the device 9, and the concavity tubular portion 63 is exposed from the bag insertion hole 10 into the tube 8. use.

When air or water is supplied from the hose 3 into the bag 1 to inflate it, the bag 3 is strongly pushed to the downstream side of the pipe 8, and therefore the hose 3 receives strong bending force and tensile force. As a result of gentle bending along the inner curved surface 64 of the conical tubular portion 63, rapid bending is prevented.

That is, the inner curved surface 64 of the concentric tubular portion 63 is continuous with the inclined inner peripheral surface of the enlarged end portion 41 of the mouthpiece 4 to form a long gentle curved surface, and the inner peripheral end interval of the locking step portion 62 is That is, the hose 3 has some play because the inlet of the tubular portion 63 is larger than the outer diameter of the hose 3.
Is gently guided along a long and gently curved surface. This prevents the hose 3 from being damaged or cut.

According to this embodiment, the hose 3 is prevented from being damaged, and when the hose 3 is attached to the base 4, the bending base point of the hose 3 is not the inner peripheral base point of the support tubular portion 63 but the enlarged end portion 41 of the base 4. Since it becomes the base point portion 42, it is bent and guided long and gently, and the length of the concentric tubular portion 63 can be shortened. In this respect, it is sufficient to simply lengthen the conical tube portion, but in consideration of water pressure, the small hose bending prevention tube 6
Is what you want.

[0015]

As described above, according to the present invention, the inner curved surface of the concentric tubular portion is continuous with the slanted inner peripheral surface of the enlarged end portion of the mouthpiece to which a long gentle curved surface is extended and has a play gap. The hose is gently bent and guided, and the hose is damaged.
The effect of preventing cutting is great, and since it is continuous with the enlarged end portion of the die, it is possible to shorten the conical tube portion and form it in a small size.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view in a water-stop state using an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view in which a part of a main portion thereof is cut away.

FIG. 3 is a vertical cross-sectional view of a conventional example in use.

[Explanation of symbols]

 1 Bag 2 Mounting Port 3 Hose 4 Base 41 Enlarged End 42 Base Point of Enlarged End 6 Hose Bending Prevention Tube 61 Adhered Tube 62 Locking Step 63 Inner Curved Tube 64 Inner Curved Surface 8 Tube 10 For Bag Insertion Hole

Claims (1)

[Scope of utility model registration request] 1. The other end of a flexible hose 3 connected to a water stopping device bag 1 is attached to a base 4 to be attached and inserted,
It is arranged and used so as to face the inside of the tube through a bag insertion hole 10 provided in the tube 8, and a locking step portion 62 on which the enlarged end portion 41 of the mouthpiece 4 can be seated is provided around the inner periphery of the adhered tube portion 61. At the same time, a concentric tubular portion 63 thicker than the adhered tubular portion 61 is continuously provided from the locking stepped portion 62, and the inner peripheral surface of the concentric tubular portion 63 is formed into a gentle curved surface facing outward. A hose bend prevention tube for a water stopping device bag, characterized in that the distance between the inner peripheral ends of the locking step portions 62 is made slightly larger than the outer diameter of the hose 3.