JP3521943B2 - Flexible hose - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has flexibility for use in underdrain drainage pipes, water supply pipes, air ducts, etc. The present invention relates to a flexible hose which can be stretched from a state to a desired length and used.

[0002]

2. Description of the Related Art Conventionally, a tape material such as a cloth material coated with a synthetic resin, a synthetic resin sheet material, or a waterproof cloth is wound in a continuous spiral shape and the side ends are joined by fusion bonding or with an adhesive. The hose is mainly formed in a cylindrical shape by joining, and a hard synthetic resin reinforcing strip that holds the shape of the cylindrical hose is wrapped around the joining part of the tape material and integrally joined by fusion or adhesion. With a structure that prevents the flat hose from being flattened or a tape material cut into a length corresponding to the circumference of the hose is wound in advance into a cylindrical shape to form a plurality of cylindrical bodies and the cylindrical bodies are joined together. Then, a hose is constructed to have a structure in which a reinforcing strip is arranged in a circular shape on the outer circumference of the joint portion of the above-mentioned cylindrical body and joined.

[0003]

However, in the above-mentioned conventional hose, the total length of the hose is determined by the total width of the tape material between the reinforcing strips, and the tape materials are arranged while being fully extended. Since the hose length is constant, it cannot be used by extending it beyond the width of the tape material between the reinforcing strips.

On the other hand, in a flexible duct of an air conditioner, there is a bellows-shaped hose (hereinafter referred to as a bellows hose). However, since the bellows hose is bent into a W shape, the bent portion has a diameter. There is a problem that the diameter of the hose becomes large and bulky when the hose is enlarged and contracted. Also, since it is a hard hose made of plastic, it becomes a rigid cylinder with a cylindrical shape when it is contracted, and it is difficult to wind and store it. Good but
As a hose for drainage treatment over a long distance such as an underdrain pipe, it was not easy to carry.

The present invention has been made in view of the above-mentioned problems of the prior art, and has flexibility such that it can be wound up and conveyed in a contracted state, and can be stretched to a desired length before use. It is intended to provide a flexible hose capable of

[0006]

In order to achieve the above object, the present invention according to claim 1 provides a method in which side ends of a flexible tape material wound in a spiral shape are joined together to form a tubular shape. A flexible hose formed by spirally winding and joining a reinforcing strip around the outer periphery of the flexible tape material, wherein a central portion of the flexible tape material is provided with a foldable portion It is a flexible hose that is formed so as to be stretchable.

According to a second aspect of the present invention, a plurality of cylindrical bodies formed by winding flexible tape pieces are joined together to form a tubular shape, and a reinforcing strip is formed on the outer circumference of the joined portion of the cylindrical bodies. A flexible hose formed by winding it into a shape and joining the flexible tape hose, wherein the flexible tape piece has a central portion provided with a fold-back portion that can be stretched so as to be stretchable. Is.

That is, according to the first aspect of the invention, a long hose tape material is spirally wound to form a cylindrical hose, whereas in the second aspect , a tape piece previously cut into a predetermined length is used. A plurality of cylinders are wound to form a cylinder, and the cylinders are joined to form a hose. In addition, in the above flexible hose, the folded-back portion is folded back in a Z-shape or an S-shape, and may be double-folded or triple-folded instead of single-folded. The flexible sheet material or tape material is formed of a flexible flexible flexible sheet material such as a cloth material coated with a synthetic resin, a synthetic resin sheet material, or a waterproof cloth.

[0009]

Since the tubular portion made of the flexible sheet material between the reinforcing strips is folded into two or more layers, it can be greatly bent through the folded portion and can be wound. Not only can the handling be improved, but the hose can be made extremely long by pulling out the folded part in the lengthwise direction, and it can be greatly contracted by folding it backwards. it can.

Therefore, when the hose is short and sufficient, the folded portion is used as it is, and when the hose is not long enough to be used as an underdrain drainage pipe or an air duct, the above is used. By extending the folded part of the flexible tape material while rotating the hose, the hose length can be doubled or more, and the hose can be used in a state of sufficient length for the distance of the underdrain drainage pipe or air duct. Even in this case, it can be freely bent.

Further, in the invention described in claim 1 ,
Since it is configured by winding a flexible tape material in a spiral shape,
When manufacturing the hose, a flexible long tape material is previously folded back into a Z shape or an S shape at the center portion in the width direction, and the folded tape material is continuously wound in a spiral shape to form a hose. The body can be manufactured. Moreover, since the reinforcing strips are similarly arranged spirally along the joining portion of the tape material, the spiral winding of the tape material and the spiral winding of the reinforcing strip are simultaneously performed. It becomes possible to join and it can be formed with high productivity.

According to the second aspect of the present invention, a plurality of cylindrical bodies formed by winding the flexible tape piece are provided with a folding portion at which the central portion of the flexible tape piece can be stretched so as to be stretchable. In addition, since the reinforcing strips are formed in a circular shape and arranged on the outer periphery of the joint portion of the cylindrical body, the folded portions of each cylindrical body can be independently stretched between the reinforcing strips, and the hose can be twisted or twisted. It is possible to extend the entire length of the hose to a desired length while keeping the diameter of the hose without turning.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. In FIG. 1, A denotes a flexible hose, which is a waterproof and flexible sheet material such as a synthetic resin-coated cloth material or a synthetic resin sheet material, or has a large number of small holes. Forming a flexible hose body A'in the shape of a long cylinder from a flexible sheet material to which water is given, and folding a predetermined length portion into a Z-shaped cross section with a certain length interval. the Yes forming a folded portion 2, 2 2, is made by fixing a reinforcing strip body 3 made of a hard synthetic resin on the outer peripheral surface of the single sheet portion between the folded portions 2 adjacent.

In the above flexible hose, the reinforcing strip 3 is spirally wound. In this case, the folded portion 2 is formed in a continuous spiral shape as shown in FIG. 2 and a single sheet between the folded portions 2 and 2 is formed. The reinforcing strip 3 is wound in a continuous spiral shape and fixed on the portion. However, as shown in FIGS. 3 and 4, the flexible hose main body A ′ is provided with a constant length portion at regular intervals. When the ring-shaped folded-back portions 2 and 2 are formed, the annular reinforcing strip 3 may be fixed onto the single sheet portion of the folded-back portions 2 and 2. Further, the folded-back portion 2 may have a form in which it is folded more than double.

[0015] Figure 5 shows an embodiment of a flexible hose A according to claim 1 of the present invention, a flexible tape material 1 long obtained by cutting the sheet material at a constant width, The central portion of the flexible tape material 1 is folded back into a Z shape to have a width of about 1 /
3, the folded portion 2 is formed, and the side edges of the flexible tape material facing each other are continuously spirally wound so as to be in an overlapping state as shown in FIG. By joining the edges integrally by fusion or adhesion, a cylindrical hose main body A'is formed, and the reinforcing strip 3 is spirally adhered on the overlapping end edge portion, Alternatively, they are integrally fixed by fusion.

That is, the reinforcing strips 3 are spirally arranged at a constant pitch with the folded-back portion 2 of the flexible tape material 1 sandwiched therebetween and integrated, and the folded-back portion of the flexible tape material 1 is integrated. When 2 is stretched, the pitch of the reinforcing strips 3 is expanded while the reinforcing strips 3 are swung, and the folded-back portion 2 of the flexible tape material 1 is stretched while narrowing the diameter of the spiral circle of the reinforcing strips 3. FIG. 7 shows a stretched state, in which all the folded-back portions 2 of the flexible tape material 1 are stretched to have a length about three times the length of the original hose body.

The folded back portion 2 of the flexible tape material 1 may be formed by folding back three or more layers such as S-shape as shown in FIG. Further, the reinforcing strip 3 protects the hose body made of the flexible tape material 1 so as not to be crushed by external pressure, and may be a composite of metal wire material and the like. First of all, such a hose is made of flexible tape material 1.
After being folded back in a Z-shape at the central portion in the width direction to form the folded-back portion 2, the flexible tape material 1 is continuously wound spirally on the rotational molding shaft to fuse the side end portions to each other. It can be easily manufactured by joining the reinforcing strips 3 along the surface of the joining portion of the tape material and integrally joining them by fusion while arranging them in a spiral shape at the same time as joining them with each other.

The flexible hose is usually wound and transported or packed while the folded-back portion 2 is folded back. When the hose is used, the folded-back portion 2 is stretched in accordance with the installation distance. The hose is extended to a desired length.

FIG. 9 shows a flexible hose A of the present invention according to claim 2. In the flexible hose main body A'shown in FIG. The flexible tape pieces 5 are sequentially joined in the length direction. That is, the central portion of the flexible tape piece 5 cut to an appropriate length is folded back into a Z shape to provide a fold-back portion 2, and each flexible tape piece 5 is bent into a cylindrical shape to form a plurality of circles. The ring 5a is formed, and this ring 5a
The open end portions of the above are overlapped with each other and joined by fusion or adhesion to form a long tubular hose body. A ring-shaped reinforcing strip 3 made of synthetic resin and having a substantially T-shaped cross section is fixed along the outer circumference of each joint of the annular body 5a by fusion bonding or adhesion.

That is, the reinforcing strips 3 are independently arranged at a constant pitch with the folded-back portion 2 of the flexible tape piece 5 sandwiched therebetween and integrated, and the folded-back portion of the flexible tape piece 5 is integrated. When 2 is stretched, the pitch between the reinforcing strips 3 is expanded, each flexible tape piece 5 is stretched, and the total length of the hose body is stretched about 3 times. In this case, since each of the reinforcing strips 3 is independent of each other, the hose can be used with its diameter changed to the diameter as it is. The flexible tape piece 5 and the reinforcing strip 3
The material of is formed in the same manner as the flexible tape material 1 and the reinforcing strip 3 of the previous embodiment, and the description thereof is omitted.

[0021]

As described above, according to the flexible hose of the present invention, the hose main body formed of a flexible sheet material in the shape of a long tube is provided with folding portions at regular intervals and extends. Since it is formed freely and the reinforcing strips are fixed between adjacent folded parts, it does not become rigid like a plastic bellows hose and the flexibility of the entire hose is improved by the folded parts. Is secured, and it is easy to take up and convey like a normal take-up hose.
Further, the folded portion can be stretched to be used in a desired length, and it has an effect that the length can be easily set as a flexible hose connecting a long distance such as an underdrain drainage pipe or an air duct. .

Further, according to the present invention of claim 1 , since the flexible tape material is spirally wound, the flexible tape material is preliminarily Z-shaped or S-shaped at the central portion in the width direction. The hose body can be manufactured by folding the tape material back into the mold and continuously winding the tape material in a spiral shape, and at the same time, arranging the reinforcing strip in a spiral shape along the joint portion of the tape material. The flexible hose which can be stretched can be formed with high productivity.

According to a second aspect of the present invention, a plurality of cylindrical bodies formed by winding flexible tape pieces are joined together to form a tubular shape, and a reinforcing strip is formed on the outer circumference of the joined portion of the cylindrical bodies. A flexible hose formed by winding it into a shape and joining the flexible tape hose, wherein the flexible tape piece has a central portion provided with a fold-back portion that can be stretched so as to be stretchable. Therefore, the flexibility of the entire hose is ensured, and it is easy to wind and convey as in the case of an ordinary winding type hose. The hose can be independently stretched, and the hose can be stretched to a desired length without changing the hose diameter without twisting or turning.

[Brief description of drawings]

FIG. 1 is a partial side view of a flexible hose,

FIG. 2 is a simplified enlarged vertical sectional side view,

FIG. 3 is a partial side view showing another structure of the flexible hose,

FIG. 4 is a simplified vertical sectional side view thereof,

FIG. 5 is a simplified vertical sectional side view of a flexible hose formed by spirally winding a flexible tape material.

FIG. 6 is an enlarged cross-sectional view of the joint portion,

FIG. 7 is a side view showing an extended state,

FIG. 8 is an enlarged cross-sectional view when a folded-back portion having three or more layers is formed,

FIG. 9 is a simplified vertical cross-sectional side view of a flexible hose formed of a piece of flexible tape in a ring shape.

[Explanation of symbols]

A flexible hose A'mainly hose 2 Folded part 3 Reinforcing strips

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 11/16 F16L 11/10 F16L 11/12

Claims (2)

(57) [Claims] 1. A spirally wound flexible tape material is joined at its side ends to form a tubular shape, and a reinforcing strip is spirally wound around the outer circumference of the joint portion of the flexible tape material. A flexible hose formed by joining the flexible tape members, wherein the flexible hose is formed so as to be stretchable by providing a fold-back portion that can be stretched at a central portion of the flexible tape material. 2. A plurality of cylindrical bodies formed by winding flexible tape pieces are joined together to form a tubular shape, and a reinforcing strip is wound around the outer circumference of the joined portion of the cylindrical bodies and joined together. A flexible hose comprising: a flexible tape piece, wherein the flexible tape piece is formed so as to be stretchable by providing a fold-back portion that can be stretched at a central portion of the flexible tape piece.