JP2689084B2 - Insulated hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a heat insulating hose for flowing a cooling fluid or the like.

[0002]

2. Description of the Related Art As this type of heat insulating hose, the one shown in FIG. 4 has been conventionally known, and its structure is as follows. A reinforcing wire 2 is spirally wound around the inner tube 1. A band-shaped heat insulating material 3 made of foamed resin is spirally wound around the inner tube 1 around which the wire 2 is wound, and an exterior tape 4 is wound on the heat insulating material 3 in the same spiral shape. Is wrapped around.

[0003]

In the conventional hose as described above, the wire 2, the heat insulating material 3 and the tape 4 are all wound around the inner tube 1 in a spiral shape. There has been a problem that the number of man-hours increases and the manufacturing cost increases correspondingly. Further, when the exterior tape 4 is torn and the heat insulating material 3 is exposed, and the exposed portion is cut off, the heat insulating material 3 comes off from the inner tube 1 so that the wound thread is unwound.
There was a problem that it would not function as a heat insulating hose.
Further, since the heat insulating material 3 is wound in a spiral shape, the surface of this hose becomes wavy and uneven. For that reason, for example, when trying to pass this hose through a narrow space, the bumps will get caught in various parts,
There were times when I couldn't pass the hose smoothly. Moreover, if the bumps were caught in various places, the places that were caught could be torn. An object of the present invention is to provide a heat-insulating hose which not only prevents the outer tube made of a heat insulating material from coming off from the inner tube but also reduces the manufacturing cost, and makes the surface of the outer tube flat.

[0004]

SUMMARY OF THE INVENTION A first invention is that a hard resin reinforcing material is spirally wound around the outer circumference of a soft resin inner tube, and a screw thread made of the reinforcing material is wound around the outer circumference of the inner tube. while forming a Rudake covered with the outer tube made of heat insulating material such as foamed resin on the outer periphery of the reinforcing member
And in the thread groove part formed by the reinforcing material,
To form a space sandwiched between the inner tube and the outer tube, these inner tube and Au
A joint is provided at the end of the
The receiving part is formed on the
The sleeve fits snugly, and the outer
It is characterized in that it covers the tip of the tube . According to a second aspect of the present invention, a joint is put on the tip of the inner tube to form a thread groove on the inner circumference of the joint, and the thread groove is configured to match a thread made of a reinforcing material. It has a feature in that it is screwed.

[0005]

[Action] first invention, since the lower back the outer tube of heat insulating material over the reinforcing material to form a thread, a space is threaded groove portion sandwiched between the inner tube and the outer tube forming This space functions as a heat insulating layer. And the inner tube is made of soft resin and reinforced
Since the material is made of hard resin, the flexibility of the entire hose is maintained.
While preventing the hose from bending sharply
Can be. In the second invention, the joint can be directly attached to the inner tube by screwing the thread groove formed on the inner circumference of the joint and the reinforcing material of the inner tube. And this outer tube is
Since it is the tube itself, its surface can be flattened.

[0006]

EXAMPLE The example shown in FIGS. 1 to 3 is based on the hose body a.
Is composed of an inner tube 11, a thread 12, a reinforcing material 13, and an outer tube 14. Moreover, the inner tube 11 is made of a soft resin, the reinforcing material 13 is made of a hard resin, and the outer tube 14 is made of a heat insulating material made of foamed resin. Then, a plurality of reinforcing threads 12 are laid along the longitudinal direction on the outer side of the inner tube 11 as described above, and the reinforcing material 13 is spirally wound on the threads 12. , Inner tube 1
A screw thread made of the reinforcing material 13 is formed on the outer periphery of 1.

The reinforcing material 13 is made of hard resin in order to prevent the hose body a from bending. That is, since the inner hose 11 made of soft resin is soft, if it is left as it is, the hose body a
Can easily bend. Therefore, if the inner tube 11 is made of a hard resin, then this hose may tend to lack flexibility as a hose. However, if the inner tube 11 is made of a soft resin and the hard resin reinforcing material 13 is wound around it in a spiral shape as described above,
It is possible to maintain the flexibility of the hose body a to some extent and prevent the hose body a from bending.

After the reinforcing material 13 is wound around the inner tube 11 as described above, this time, the inner tube 1 is wound.
1 is an outer tube 1 made of a heat insulating material such as foamed resin.
Cover with 4. In this way, a space 15 sandwiched between the inner tube 11 and the outer tube 14 is formed in the thread groove portion formed by the reinforcing material 13, and this space 15 functions as a heat insulating layer. A joint 16 is fitted to the tip of the hose body a. As shown in FIG. 1, the joint 16 has a joint port 16a at one end thereof and a cylindrical portion having a diameter larger than that of the joint port 16a. 16b and a cylindrical receiving portion 16c having a diameter larger than that of the cylindrical portion 16b.

Inside the tubular portion 16b, a thread groove 16d having the same pitch as the thread of the reinforcing member 13 is formed, and the inner diameter of the tubular portion 16b is set to a size in which the inner tube 11 fits snugly. . In addition, the receiving portion 16
The inner diameter of c is sized to fit the outer tube 14 snugly. The inner tube 11 is exposed from the outer tube 14 at the tip of the hose body a, that is, the tip on the side where the joint 16 is fitted, and this exposed portion is fitted into the tubular portion 16b of the joint 16.

In the heat insulating hose as described above, since the outer tube 14 made of the heat insulating material is covered on the reinforcing material 13, even if a part of the outer tube 14 is damaged, the conventional heat insulating material 3 is used. Like, it doesn't get loose. Further, since the space 15 sandwiched between the inner tube 11 and the outer tube 14 is formed in the thread groove portion of the reinforcing material 13, this space 15 functions as a heat insulating layer. Therefore, the space 15 and the outer tube 14 are combined to further improve the heat insulating effect.

Furthermore, since the inner tube 11 is made of a soft resin and the reinforcing material 13 made of a hard resin is wound around the inner tube 11, it is possible to prevent the hose from being bent at a steep angle. Moreover, since the reinforcing material 13 is spirally wound around the soft inner tube 11, the flexibility of the entire hose can be maintained even if the reinforcing material 13 is made of hard resin. In the joint 16 attached to the hose body a as described above, the thread groove 16d having the same pitch as the thread of the reinforcing member 13 is formed inside the cylindrical portion 16b, so that the joint 16 can be directly fixed to the inner tube 11.
That is, no special mechanism is required for attaching the joint 16 to the hose body a.

[0012]

According to the heat insulating hose of the first aspect of the present invention, the heat insulating hose is flexible.
The resin of the inner tube, wound only reinforcing member made of hard resin helically, it is only the outer tube causes turnip over the reinforcement wire as in the prior art 2, heat insulator 3 and the tape The manufacturing cost can be significantly reduced as compared with the case of winding all 4 in a spiral shape. In addition, since a space as a heat insulating layer is formed in the thread groove portion formed of the reinforcing material, the space, together with the outer tube made of the heat insulating material, further improves the heat insulating effect. Furthermore, since the outer tube surface can be flattened, this hose can be smoothly passed even in a narrow space, and the surface does not get caught in various places and break. And the flexibility of the whole hose
While maintaining flexibility, hose bends at a sharp angle
Can be prevented. According to the heat insulating hose of the second invention, since the joint can be directly attached to the inner tube, a special member for attaching the joint is not required, and the number of parts can be reduced and the number of assembling steps can be reduced. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a state in which a joint is attached to a hose body.

FIG. 2 is a perspective view showing a state in which an inner tube and an outer tube are separated.

FIG. 3 is a side view of an inner tube wound with a reinforcing material.

FIG. 4 is a perspective view showing a state in which a part of a conventional heat insulating hose is unwound.

[Sign]

 11 Inner tube 13 Reinforcement material 14 Outer tube 15 Space 16 Joint

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 27/12 B32B 27/12

Claims (2)

(57) [Claims] 1. A soft resin inner tube is helically wound around a hard resin reinforcing material to form a screw thread made of the reinforcing material on the outer circumference of the inner tube.
The only to the outer periphery of the reinforcing member Ru covered with the outer tube made of heat insulating material such as a foamed resin, and the screw groove portion formed by the reinforcing member, to form a space sandwiched between the inner tube and the outer tube ,these
At the tip of the inner tube and outer tube,
Mount the joint, and form the receiving part on this joint.
Set the inner diameter of the shank to fit the outer tube.
Cover the tip of the outer tube with this receiving part.
Insulation hose. 2. A covering the joint at the distal end of the inner tube, to form a screw groove in the joint in the circumferential, this screw groove, a configuration that matches the threads consisting of reinforcing material, screw and joint and the inner tube The insulated hose according to claim 1, which is bonded.