JP2003113980A - Swivel joint for lay-flat hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a swivel joint enabling to fasten a lay-flat hose. SOLUTION: A tapered shape barb part 2 and a thread part 3 connecting to the barb part 2 are formed on an outer circumference of one end side of a hollow hose coupling part 1. A hose fastening nut 13 is threadedly engaged with the thread part 3. A swivel part 11 is constructed on another end side of the hose coupling part 1. The swivel part 11 is comprised of a swivel nut 8 provided with an internal thread part 9 and flat packing 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a swivel joint capable of tightening a lay flat hose.

[0002]

2. Description of the Related Art Conventionally, a method in which a lay flat hose is deeply inserted into a coupling barb portion of a joint and tightened and fixed with a stainless steel hose band has been the mainstream. At this time, with a joint with a small diameter, only one hose band was required, but when using a hose with a large diameter such as 30 mm to 50 mm, two hose bands will be used, which makes it difficult to tighten and workability. Was also bad.

Further, since the lay flat hose is strongly and directly tightened, since the other end of the stainless steel hose band has an acute angle, the hose is damaged and the hose swells when the internal pressure rises when water is passed, and the hose band side end. It digs into the part and promotes scratches on the hose, causing partial cracking and water leakage. To prevent this, a short cut lay flat hose was placed on the part that touches the hose band (double protection). However, this work is very laborious, inefficient, requires more assembly steps, and requires labor costs. In addition, the separate tightening method requires a work of winding the copper wire with a uniform tension, which also requires skill and time.

The mainstream of these joints is the use of screws called so-called bamboo shoot joints, which involve twisting of the hose during continuation and untwisting work. The conventional product, which has many components, is inevitably expensive.

[0005]

SUMMARY OF THE INVENTION The swivel joint for a lay flat hose of the present invention eliminates the above-mentioned drawbacks and enables the installation to be completed easily in a short working time on site (farms, etc.) without using tools. , The lay flat hose continuation part and the swivel nut are integrated to obtain an epoch-making, convenient and inexpensive product.

[0006]

According to the swivel joint of claim 1 of the present invention, a tapered barb portion is formed on the outer periphery of one end of the hollow hose coupling portion, and a threaded portion connected to the barb portion. And a hose tightening nut is screwed into this screw part, and the swivel nut part on the other end side of the hose coupling part constitutes the two functions of the hose tightening nut and the swivel nut part. By integrally configuring the main part of the, it is possible to obtain an epoch-making product which is inexpensive, has high accuracy, has a small number of parts, and is easy to maintain.

According to the second aspect of the present invention, a trapezoidal screw is used for the screw portion and the female screw portion of the tightening nut screwed to the screw portion, and the screw portion and the tightening nut are used. By using a highly accurate trapezoidal screw, strong and even tightening can be performed with less rotation.

According to the swivel joint of the third aspect, the swivel nut is a swivel nut in which the hose untwisting unnecessary screw-type union function is provided in the swivel nut portion, and the swivel nut (union function) is used to start ( It is possible to set it easily without twisting the connection.

According to the fourth aspect of the present invention, the swivel nut forming the swivel nut portion has a female screw portion and a flat packing which cooperates with the female screw portion, thereby forming the female screw portion and the flat packing. And the mechanism is simple,
Moreover, it has excellent sealing properties.

According to the fifth aspect of the present invention, the hose coupling portion, the hose tightening nut, and the swivel nut are made of reinforced industrial synthetic resin, and are lightweight. This eliminates the need for expensive stainless steel hose bands and greatly reduces the work required to connect the hose to the coupling.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, in FIGS. 1 and 3, reference numeral 1 denotes a hollow hose coupling portion, a tapered barb portion 2 on the outer periphery at one end side thereof, and a screw portion 3 connected to the barb portion 2. Is formed, and the enlarged diameter portion 4 is connected to the threaded portion 3.
Is formed.

A groove portion 5 is formed at the other end of the hose coupling portion 1 so as to be continuous with the expanded diameter portion 4 and a projecting edge 6 which is continuous with the groove portion 5.
Is formed. A swivel nut 8 having a hanging edge 7 that is locked by the groove portion 5 and cannot be disengaged by the projecting edge 6 is provided with a female screw 9 that has a screw type single unit function that does not require hose untwisting, and A flat packing 10 is engaged with the female screw 9, and the swivel nut portion 1
1 is composed of a swivel nut 8 and a flat packing 10.

In the hose tightening nut 13 having the female screw portion 12 to be screwed into the screw portion 3 formed on one end side of the hollow hose coupling portion 1, the screw portion 3 and the female screw portion 12 are trapezoidal screws. When used, it has the effect of increasing the tightening strength of the layflat hose described below.

As described above, in the swivel joint for a layflat hose shown in FIGS. 1 to 3, the tightening mode of the layflat hose will be described with reference to FIGS. 4 to 6.

FIG. 4 shows a state in which the hose tightening nut 13 is fitted to the lay flat hose 14, and the hose coupling portion 1 is provided with a connecting portion 15 such as a valve socket separately from the hose coupling portion 1. The connecting portion 15 is a male screw portion 1 to be screwed into the female screw portion 9 of the swivel nut 8.
6 is provided.

In FIG. 5, the tip portion 17 of the lay flat hose 14 is inserted so as to follow the tapered shape of the barb portion 2. At this time, it is desirable to form a groove 18 between the barb portion 2 and the screw portion 3. That is, as shown by arrows F, F, the end portion of the lay flat hose 14 is inserted into the groove 18. In addition, this FIG.
In the swivel nut portion 11, the connecting portion 15 has its female screw portion 16 screwed into the female screw portion 12,
The tip of the connecting portion 15 is pressed against the flat packing 10.

In FIG. 6, by screwing the female thread portion 12 of the hose tightening nut 13 into the thread portion 3 of the hose coupling portion 1, the hose tightening nut 13 and the hose tightening nut 13 are formed along the tapered slope of the barb portion 2. The lay flat hose 14 can be firmly and evenly and tightly tightened with a small number of rotations between them.

[0018]

According to the present invention, the following effects can be achieved. (1) The swivel joint for a lay flat hose is inexpensive, highly accurate, has a low number of parts, and is easy to maintain and manage by integrally molding the two main functions, which consist of a tightening nut part and a swivel nut part. It is an epoch-making product. (2) By using a highly accurate trapezoidal screw for the thread portion of the tightening nut, it is possible to tighten firmly and evenly with less rotation. (3) If the inner diameter of the hose is the same, the threaded portion of the tightening nut moves on the slope of the barb and tightens.
Also compatible with relatively thick lay flat hoses. (4) The swivel nut (union function) makes it easy to set the start (removal) connection part without twisting. (5) The swivel nut section has a simple structure of the female thread section and the flat packing, and is excellent in sealing property. (6) Since an expensive stainless steel hose band is not necessary, the work of connecting the hose and the coupling can be greatly reduced. (7) Since the hose band is unnecessary, the biting margin of the hose is small and there is little loss. (8) Since the hose band is unnecessary, the hose will not be damaged. (9) Since the hose band is unnecessary, the tightening work can be done in a short time and can be firmly fixed.

[Brief description of drawings]

FIG. 1 is a side view showing a swivel joint for a lay flat hose of the present invention, divided into respective parts.

FIG. 2 is a sectional view of each part shown in FIG.

FIG. 3 is a cross-sectional view of a state in which a hose coupling portion in which a swivel nut portion is integrated and a hose tightening nut are screwed together.

FIG. 4 is a cross-sectional view showing a hose tightening nut screwed onto a lay flat hose, a hose coupling part including a swivel nut part, a valve socket and the like, and a connecting part.

FIG. 5 is a sectional view showing a state in which a lay flat hose is inserted into a hose coupling section.

FIG. 6 is a cross-sectional view showing a state where the end portion of the lay flat hose is fastened with a hose fastening screw.

[Explanation of symbols]

1 Hose coupling part 2 barbs 3 screw part 6 rim 8 swivel nut 9 female screw 10 flat packing 11 Swivel nut part 12 Female thread 13 Hose tightening nut 14 Ray Flat Horse 15 Connection part (valve socket, etc.)

Claims (5)

[Claims] 1. A hollow hose coupling portion is formed with a tapered barb portion on an outer periphery on one end side and a screw portion continuous with the barb portion, and a hose tightening nut is screwed into the screw portion, and A swivel joint for a layflat hose that has a swivel nut on the other end of the hose coupling. 2. The swivel joint for a lay flat hose according to claim 1, wherein a trapezoidal screw is adopted for the threaded portion and the female threaded portion of the tightening nut screwed to the threaded portion. 3. The swivel joint for a lay flat hose according to claim 1, wherein the swivel nut portion is a swivel nut having a screw type union function that does not require twisting back of the hose. 4. A swivel joint for a lay flat hose according to claim 1, which is composed of a swivel nut having the swivel nut portion teeth and an internal thread, and a flat packing that cooperates with the internal thread. 5. The swivel joint for a lay flat hose according to claim 1, wherein the hose coupling portion, the hose tightening nut, and the swivel nut are made of a reinforced industrial synthetic resin.