JP2002195465A - Hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a flow passage in a hose from completely being closed even if the hose is stepped on by vehicle wheels or a person, or the hose is bent in an acute angle. SOLUTION: At least a protrusion streak 12 is formed to extend to the axial direction on the inner wall of a hose body 11. It is recommended to form two or more streaks and to form the streaks to be at an equal angles from a center axis A as a center of the hose body 11, in order to implement the complete prevention of the closure of the flow passage. It is preferable that the protrusion steak 12 be formed integrally with the hose body 11 to enhance sticking strength, durability, and production efficiency, and it is preferable that the protrusion streak 12 be continuously formed to ensure the prevention of the closure of a hose 1. Preferably, a height h of the protrusion streak is within a range of 5-30% of the inner diameter of the hose body 11 to secure the smooth flow of fluid and to prevent the closure, and a shape of a cross section of the tip of the protrusion streak 12 is a circular arc to surely prevent the closure of the flow passage and prevent the damage of the inner wall when an external force is applied to the hose 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose for flowing a fluid such as water, oil or gas.

[0002]

2. Description of the Related Art Conventionally, hoses for flowing water, oil, and gas used in homes are generally made of a rubber body because of their easy handling and workability. Was crawling on the floor. Therefore, for example, as shown in FIG. 6, when the hose is stepped on by a person or a wheel (FIG. 6A), or when the hose is hooked on an object and bent at an acute angle (FIG. 6B), The flow path in the hose is blocked at that part, and water or gas leaks from the part where the water pressure or gas pressure can not withstand, for example, the connection part between the water faucet or gas supply port and the hose, or the hose comes off. There was a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and the flow path in the hose can be maintained even when stepped on a wheel or a person or bent at an acute angle. The aim is to provide a hose that does not completely block.

[0004]

In order to achieve the above object, the hose of the present invention has one or more ridges formed on the inner wall of the hose body in the axial direction.

Here, from the viewpoint of more completely preventing the passage from being blocked, it is recommended that two or more ridges are formed and are formed at an equal angle around the center axis of the hose body. You.

It is preferable that the ridge is formed integrally with the hose body from the viewpoints of fixing strength, durability and production efficiency.

[0007] In addition, from the viewpoint of further ensuring the blockage resistance of the hose, it is preferable that the ridge is formed continuously.

Further, from the viewpoint of ensuring smooth flow of the fluid and resistance to clogging, the height of the ridge is preferably in the range of 5 to 30% of the inner diameter of the hose body.

In order to reliably prevent the passage from being closed when an external force is applied to the hose and to prevent the inner wall from being damaged, it is desirable that the cross-sectional shape of the tip of the ridge is an arc shape.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The inventor of the present invention has made intensive studies to prevent the passage in the hose from being blocked even when the hose is stepped on by a wheel or a person or when the hose is bent at an acute angle. As a result of the superposition, the present inventors have found that a ridge may be formed on the inner wall of the hose body in the axial direction, and have accomplished the present invention.

That is, one of the great features of the hose of the present invention is that one or more ridges are formed on the inner wall of the hose body. With such a configuration, even if the hose is stepped on by a wheel or a person, or even when bent at an acute angle, it is possible to prevent the ridge formed on the inner wall of the hose main body from being in close contact with the opposing inner wall, The gap through which the fluid flows is secured.

Another major feature of the hose of the present invention is that the ridge is formed in the axial direction of the inner wall of the hose body. If you just want to prevent the hose from clogging,
For example, the object is achieved even if the ridge is formed in a spiral shape. However, since a hose is generally used as a flexible tube for connecting a water tap or a gas supply port to household appliances such as a shower head, a stove, and a gas stove, it is not usually fixed on the way. In such a hose use state, for example, when a hose having a spiral ridge formed on the inner wall is used, the fluid flowing in the hose flows helically along the ridge, so-called dance development of the hose occurs. Practical problems arise. On the other hand, if the ridge is formed in the axial direction, the fluid flowing in the hose flows along the ridge, that is, along the hose axis direction, so that the hose does not dance.

FIG. 1 is a perspective view showing an embodiment of the hose of the present invention. In the hose 1 of FIG.
Are formed integrally with the hose body 11 at equal angles about every 120 ° about the center axis of the hose body 11.
These ridges 12 are formed continuously in the axial direction. FIG. 2 is a cross-sectional view when an external force is applied to a portion of the hose 1 from above. In the hose of the present invention, even when an external force is applied, the ridge 12 formed on the inner wall abuts on the opposing inner wall, so that the flow path is secured and does not close.

The number of ridges formed in the hose of the present invention is not particularly limited, and may be one, or two or more. It is estimated from which direction external force is applied to the hose. If this is not possible, it is preferable to form two or more ridges. There is no particular limitation on the inner circumferential position of the hose that forms the ridge, but it is preferable that the hose is equiangular with respect to the center axis of the hose body, and it is more preferable that another ridge be formed on the hose inner wall facing the formed ridge It is preferred that no is formed. For example, as shown in FIG. 3, three protruding ridges 12 are formed at 120 ° intervals about the center axis A of the hose body 11 (FIG. 3A). When five ridges 12 are formed, they are formed at 72 ° intervals about the center axis A (FIG. 6B).

The cross-sectional shape of the ridge to be formed is as follows.
There is no particular limitation as long as the flow path can be secured when an external force is applied. For example, as shown in FIG. 4, an arc-shaped tip (FIG. 4A), a square-shaped tip (FIG. 4B),
There are trapezoidal ones (FIG. (C)) and triangular ones (FIG. (D)). Among them, when an external force is applied to the hose and the ridge comes into pressure contact with the inner wall facing the other or another ridge, the force applied to the tip of the ridge is dispersed to suppress the deterioration of the ridge and to reduce the inner wall of the hose body. It is desirable that the cross-sectional shape of the tip of the ridge be arc-shaped from the viewpoint of preventing damage.

The height of the ridge to be formed is not particularly limited.
In order to secure a sufficient flow path even when external force is applied to the hose, the height of the ridge should be 5 to 30% of the inner diameter of the hose body.
It is preferred that The height of the ridge is 5 times the inner diameter of the hose body.
%, It may not be possible to secure a sufficient flow path when an external force is applied.
If it is higher, the ridge itself may hinder smooth flow in a normal state. A more preferred ridge height is 10 to 25% of the inner diameter of the hose body. The height of the ridge in the present invention refers to the height h from the inner wall of the hose body to the highest position of the ridge, as shown in FIG.

The ridge may be formed continuously on the inner wall of the hose body or may be formed intermittently. However, when the ridges are formed intermittently, as shown in FIG. 5, at least one ridge is formed in any of the hose cross sections perpendicular to the axis of the hose body. 12a, 12b, 12c). This is because, if there is a hose cross-section where no ridge is formed, the passage may be blocked when an external force is applied to that portion. In consideration of a later-described hose manufacturing process, it is preferable to form the ridge continuously.

The method for producing the hose of the present invention is not particularly limited, and the hose can be produced by a conventionally known method for producing a hose. Above all, it is preferable to produce the plastic melt that has been heated and plasticized by extruding it from a screw tip in an extruder, forming it into a constant sectional shape with a die, and continuously molding it, that is, extrusion molding. Here, in order to form the protrusions integrally with the hose on the inner wall of the hose, it is preferable to form in the cooling man drill for regulating the inner diameter of the pipe, a groove matching the protrusions to be formed in the axial direction. Of course, the hose main body and the ridge may be formed separately, and the ridge may be fixed to the hose main body. However, integral molding is desirable from the viewpoint of the fixing strength, durability, productivity, and the like.

Although the size of the hose of the present invention is not particularly limited, there are upper and lower limits due to the manufacturing method. According to the extrusion molding, a product having a diameter of about 5 mm to 1,000 mm can be manufactured. If a special die and a cooling mandrel are used, the diameter is 500mm ~ 3,000m
m large hoses can also be manufactured.

In the present invention, the materials of the hose body and the ridge are not particularly limited as long as they have elasticity. When the hose body and the ridge are integrally formed as described above, they are of the same material. . Such materials include, for example, styrene-butadiene rubber (SBR), nitrile rubber (NBR), ethylene-propylene rubber (EP
R), synthetic rubbers such as ethylene-propylene-diene-methylene-linkage (EPDM), butyl rubber (IIR), and fluoro rubber; polystyrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, and polyamide-based thermoplastics Elastomer; natural rubber. Among them, thermoplastic elastomers are preferable because they can be easily formed by a usual extrusion molding machine, and among them, polyolefin-based thermoplastic elastomers are more preferable in terms of processability, elasticity, hardness and the like.

When connecting the hose of the present invention to a household appliance and a fluid discharge port, it is preferable to process the end of the hose according to the shape of the connecting portion. For example, when connecting the hose of the present invention to a water tap, it is preferable to cut a ridge from the end of the hose to a predetermined length to eliminate irregularities on the inner wall of the hose.

The fluid flowing through the hose of the present invention is not particularly limited, but is preferably a liquid such as water, oil, or refined petroleum, and a gas such as propane gas or city gas, and more preferably water.

The hose of the present invention can be used mainly as a hose for flowing fluid, for example, a hose used at home such as a shower hose, a kerosene hose, a gas hose, and the like. Those without the addition of a plasticizer can also be used as medical tubes such as catheters. Of course, the hose of the present invention is not limited to these uses.

[0024]

EXAMPLES The present invention will be described more specifically with reference to the following examples. It should be noted that the following examples do not limit the present invention in any way, and modifications and implementations without departing from the spirit of the preceding and following are included in the technical scope of the present invention.

Example 1 A hose having a cross section shown in FIG. 3 (a) was produced by an extruder using a polyolefin elastomer as a material. The inner diameter of the hose is 10
mm, the thickness of the hose body is 1.5 mm, and the height of the ridge is 2
mm. 30mm from the opening at both ends of this hose
The ridge was scraped off to eliminate irregularities on the inner wall of the hose, a shower nozzle was attached to one end, and the other end was connected to a water tap. Then, open the tap and let the water flow through the hose.When the shower nozzle squeezed the floor with a person weighing 65 kg, the amount of water coming out of the shower nozzle was Although it fell slightly, the amount of water was sufficient for use. Even when the hose was bent at an acute angle, the shower nozzle provided a sufficient amount of water for use.

(Comparative Example 1) A hose similar to that of Example 1 was prepared except that no ridge was formed on the inner wall, and the same occlusion test as in Example 1 was performed. In both the case and the case where the hose was bent at an acute angle, the flow path in the hose was blocked at that portion, and no water came out of the shower nozzle.

[0027]

According to the hose of the present invention, one or two or more ridges are formed on the inner wall of the hose body in the axial direction, so that the hose can be stepped on by a wheel or a person, or bent at an acute angle. In addition, it is possible to prevent the flow path in the hose from being completely closed, so that the fluid does not leak out from the hose connection part and does not come off at the connection part.

Here, when two or more ridges are formed and the ridges are formed at an equal angle about the center axis of the hose body, the blockage of the flow path can be more completely prevented.

When the ridge is formed integrally with the hose body, excellent fixing strength, durability and production efficiency can be obtained.

Further, when the ridges are formed continuously, the plugging resistance of the hose can be further ensured.

Also, the height of the ridge is 5 to 5 times the inner diameter of the hose body.
When it is in the range of 30%, smooth flow of the fluid and blocking resistance can be ensured.

When the cross-sectional shape of the tip of the ridge is an arc,
Even when an external force is applied to the hose, the blockage of the flow path can be reliably prevented and the inner wall is not damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a hose of the present invention.

FIG. 2 is a sectional view when an external force is applied to the hose of FIG.

FIG. 3 is a cross-sectional view showing an example of a forming position of a ridge.

FIG. 4 is a cross-sectional view illustrating a cross-sectional shape of a ridge.

FIG. 5 is a perspective view showing another embodiment of the hose of the present invention.

FIG. 6 is a diagram showing a closed state of a flow path in a conventional hose.

[Explanation of symbols]

 1 Hose 11 Hose body 12, 12a, 12b, 12c Ridge A Center axis h Height of ridge

Claims (6)

[Claims] 1. A hose for flowing a fluid, wherein one or more ridges are formed on an inner wall of a hose body in an axial direction. 2. The hose according to claim 1, wherein the two or more projecting ridges are formed at an equal angle around a center axis of the hose body. 3. The hose according to claim 1, wherein the ridge is formed integrally with the hose body. 4. The hose according to claim 1, wherein the ridge is formed continuously. 5. The height of the ridge is 5 times the inner diameter of the hose body.
The hose according to any one of claims 1 to 4, which is in a range of 30% to 30%. 6. The hose according to claim 1, wherein a cross-sectional shape of a tip of the ridge is an arc.