JPH10257636A - Connector of flexible conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it convenient for the installation of electrical wirings and easy to collect the wirings together to insert the bundle of the collected wirings into a flexible conduit, protect the wirings from various damages caused by external troubles and safely and securely transmit electric power to an electric apparatus for a long term. SOLUTION: The outer surface part of the end part of a seamless tube 8 of a conduit is fixed to the inner wall of a flexible conduit connection metal fitting 5 by welding. The tip of one folded end part of the flexible conduit connection metal fitting 5 is inserted into a stepped part 3C with a packing therebetween. A brim provided on the outer surface of the middle part of the flexible conduit connection metal fitting 5 is tightened and fixed by screwing the inner screw of a box nut onto an outer screw, which is provided on the outer circumference part of the flexible conduit connection metal fitting 5 main part, so as to be pressed against the end edge part of the flexible conduit connection metal fitting 5 main part. An annular box nut 6 is screwed onto the outer screw with a rubber packing 7 therebetween. The tip part of a wire conduit is pressed against the stepped part 3C. The tip part of the wire conduit is tightened and fixed by a setting bolt 9, which is screwed through the cylinder wall of the flexible conduit connection metal fitting 5 main part at a position near the outer screw on the outer circumference and presses the outer wall of the wire conduit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a power distribution unit for an electric device, which is laid out on a floor as it is. Not only is it dangerous to get caught,
There was a risk of disconnection, and moreover, it was not unusual for accidents such as mechanical oil or moisture to drip onto the surface of the electric wires and become dirty, and to be broken by a rat or the like and become disconnected. The present invention is convenient and easy to install the electric wiring, collectively inserts and fixes a bundle of electric wires, and protects the above-mentioned various types of externally applied obstacles. The present invention relates to a flexible conduit connecting device for electric piping, which can safely and reliably transmit electricity for a long period of time.

[0002]

2. Description of the Related Art There are two kinds of flexible conduits of this kind, a flexible conduit and a plica tube. Among the conventional flexible conduits, a flexible conduit is JISC830.
As shown in FIG. 6, a cross-section of a conventional example is shown in FIG. 6, and the conduit pipe body 20 has a structure in which an S-shaped strip 18 having a flat cross section is meshed and connected to a spiral to maintain flexibility. Was.

[0003]

Conventionally, as a pipe connecting device for connecting the conduit 20 of this type, there is known a tube connecting device in which internal threads are provided at both ends of a cylindrical flexible connection fitting main body. This is achieved by screwing the end of the conduit 20 into a connection fitting 21 having a thread formed on the outer periphery, or by riveting 22, so that the conduits 20 or the conduit 20 and another conduit or the conduit 2
0 and the wall of the electrical equipment.

Therefore, in a conventional flexible conduit (flexible conduit) 20 of this kind, a steel strip 18 having a cross section formed into a flat S-shape as described above is sequentially meshed and wound into a cylindrical shape. Conduit 20
Are riveted to the connection fitting 21, or the ends of the conduit 20 are screwed into the connection fitting 21 and fixed by connecting with the flange of the connection fitting 21. , Water invades from seam 19,
There was a problem that the waterproof performance could not be maintained by nature and the sealing performance could not be expected.

[0005] Therefore, in connection with such a flexible conduit 20, in order to provide waterproof performance, the outer jacket is coated with a synthetic resin such as PVC, but such a coating is applied. In the event of a fire or other accident, there is a possibility that toxic gas will be generated in the structure, so there is a problem that it is not suitable for use in closed environments such as underground construction sites or in tunnels. For use in such an environment, the use of a synthetic resin such as PVC for the jacket has been demanded as an exclusion.

Accordingly, the present invention has been made in order to solve the problems which the conventional flexible conduit 20 has.
By improving the conventional engagement structure of the tube body 20, FIG.
As shown in FIG. 5, a metal plate of stainless steel or the like as a whole is formed as a bellows-shaped or spiral-sealed seamless tube 8 which is integrally molded so as to be flexibly bent. At the same time, a sealing property is provided, and a raised screw 5c provided on the inner wall 5b of the flexible connection fitting 5 is screwed into the outer surface concave portion of the seamless tube 8 to be fitted therein, and the seamless tube 8 is connected to the flexible connection fitting 5. With the structure of brazing and welding, the entire body, including the pipe body 8 and the conduit H, through which the electric wire is pushed, has waterproof, drip-proof and oil-resistant properties to protect the electric wire, Provide a flexible conduit 8 connection device that has a quality that is sufficiently compatible as a flexible conduit 8 and that can be firmly and reliably connected to the device 12. It is an.

[0007]

The structure of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The connecting device for a flexible conduit according to the first invention is a metal conduit. One end of a seamless tube 8 of a conduit formed integrally with a bellows or spiral and having flexibility is inserted into an inner hole 5e of a tubular flexible connection fitting 5, and the flexible connection fitting is inserted. 5 is screwed into the concave portion on the outer surface of the seamless tube 8 so as to be fitted therein, and one end of the flexible connection fitting 5 is protruded inward to come into contact with a protruding portion 5a shaped like an eaves. The inner wall 5b of the flexible connection fitting 5 and the outer surface of the seamless tube 8 are directly brazed and fixed, and the tip of the protruding portion 5a of the flexible connection fitting 5 is inserted into an insertion hole at one end of the pipe flexible connection fitting body 3. 3e And a flange 7 provided on the outer periphery of the middle abdomen of the flexible connection fitting 5 by contacting with a stepped portion 3c protruding from the inner surface of the pipe flexible connection fitting main body 3.
d is brought into contact with the edge of the pipe flexible connection metal fitting main body 3, and the inner screw 1 a of the helmet nut 1 is screwed and fixed to the outer screw 3 d provided on the outer peripheral surface of the end. External screw 3a provided on the outer surface of the other end of the connection fitting body 3
In addition, a ring-shaped owl nut 6 having an inner screw 6a is
The end of the conduit H is fitted into the inside diameter of the other end of the tube flexible connection main body 3 by being screwed through the rubber packing 2 which is fitted into and abutted on the end surface recess of the tube flexible connection main body 3.
The outer wall of the conduit tube H comes into contact with the stepped portion 3c of the pipe flexible connection main body 3, and the outer wall of the flexible connection main body 3 is screwed through the cylindrical wall 3b near the outer screw 3a and pressed. This is a connecting device for a flexible conduit having a structure that can be fastened and fixed by set bolts 9.

The connecting device for a bowl-shaped conduit according to the second invention is characterized in that one end of a seamless tube 8 of a conduit formed of metal and integrally formed in a bellows shape or spiral shape while maintaining flexibility is provided. Cylindrical flexible connection fitting 5
To the inner wall 5 of the flexible connection fitting 5.
b is provided on the seamless tube 8.
Screwed into the recess on the outer surface of the
One end of the flexible connection fitting 5 abuts on a protruding part 5a formed in an eaves shape, and the inner wall 5b of the flexible connection fitting 5 and the outer surface of the seamless tube 8 are directly brazed and fixed. The tip of the protruding portion 5a is inserted into the insertion hole 3'e at one end of the tube flexible connection fitting main body 3 'via the packing 7, and the stepped portion 3 protrudingly provided on the inner surface of the pipe flexible connection fitting main body 3'. The outer thread 3 provided on the outer peripheral surface of the end of the pipe flexible connection fitting main body 3 ′ by contacting a flange 5 d provided on the outer periphery of the middle abdomen of the flexible connection fitting 5, The inner screw 1a of the helmet nut 1 is screwed and fastened and fixed to the outer screw 3'a provided on the outer peripheral surface of the other end of the pipe flexible connection fitting main body 3 '. 'a
This is a connecting device for a flexible conduit having a structure in which a ring-shaped lock nut 11 having a structure can be screwed and fixed via the cushioning rubber packing 4 and the electric device mounting wall 12.

Further, the connecting device for a bowl-shaped conduit according to the third aspect of the present invention includes a bellows-shaped or spiral-shaped conduit made of metal and having one end of a seamless tube 8 formed by holding flexibility. Cylindrical flexible connection fitting 5
To the inner wall 5 of the flexible connection fitting 5.
b is provided on the seamless tube 8.
Screwed into the recess on the outer surface of the
One end of the flexible connection fitting 5 abuts on a protruding part 5a formed in an eaves shape, and the inner wall 5b of the flexible connection fitting 5 and the outer surface of the seamless tube 8 are directly brazed and fixed. The tip of the protruding portion 5a is inserted into the insertion hole 13e at one end of the curved pipe flexible connection fitting main body 13 through the packing 7, and is brought into contact with a step 13c protruding from the inner surface of the curved pipe flexible connection fitting main body 13. Contact, said flexible connection fitting 5
The flange 5d provided on the outer periphery of the middle abdomen abuts on the edge of the curved pipe flexible connection fitting main body 13, and the outer thread 13d provided on the outer peripheral surface of the end of the bent pipe flexible connection fitting main body 13 A ring-shaped lock having an internal screw 6a to be screwed into an external screw 13a provided on the outer peripheral surface of the other end portion of the bent pipe flexible connection fitting main body 13 by screwing the internal screw 1a. This is a connecting device for a flexible conduit having a structure in which the nut 11 can be screwed and fixed via the cushion rubber packing 4.

The connecting device for a bowl-shaped conduit according to a fourth aspect of the present invention is characterized in that one end of a seamless tube 8 of a conduit formed of metal and integrally formed to have flexibility in a bellows shape or spiral shape is provided. Cylindrical flexible connection fitting 5
To the inner wall 5 of the flexible connection fitting 5.
b is provided on the seamless tube 8.
Screwed into the recess on the outer surface of the
One end of the flexible connection fitting 5 abuts on a protruding part 5a formed in an eaves shape, and the inner wall 5b of the flexible connection fitting 5 and the outer surface of the seamless tube 8 are directly brazed and fixed. The tip of the protruding portion 5a is inserted into the insertion hole 23e at one end of the tube flexible connection main body 23 via the packing 7, and comes into contact with a step 23c protruding from the inner surface of the tube flexible connection main body 23. The flange 5d provided on the outer periphery of the middle abdomen of the flexible connection fitting 5 abuts on the edge of the pipe flexible connection fitting body 23, and the pipe flexible connection fitting body 2
The inner screw 1a of the helmet nut 1 is screwed and fastened to the outer screw 23d provided on the outer peripheral surface of the end portion of the end portion 3, and the inner screw 23a is provided on the inner surface of the other end portion of the pipe flexible connection fitting main body 23. This is a flexible conduit connection device having a structure in which a distal end portion of a conduit H ′ having an outer thread 29 screwed to the inner thread 23a on the inner diameter can be fitted and screwed together.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a longitudinal sectional view of a flexible conduit connecting device according to one embodiment of the first invention, and FIG. 2 is a flexible conduit connecting device according to another embodiment of the second invention. FIG. 3 is a longitudinal sectional view of a flexible conduit connecting device showing an application example of FIG. 2, and FIG. 4 is a flexible conduit showing an application example of FIG. 2 of the third invention, and a curved tube. FIG. 5 is a longitudinal sectional view of a connecting device for a flexible conduit showing one embodiment of the fourth invention of the present invention.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The connecting device for a flexible conduit according to the first invention is characterized in that: a cylindrical flexible connection fitting 5 is provided with a protruding portion 5a protruding inward in an eave shape at one end thereof;
A raised screw 5c is provided over the inner circumference of about 1 to 3/4.

One end of a seamless tube-like conduit 8 formed by integrally forming a metal plate such as stainless steel in a bellows shape or a spiral shape while maintaining flexibility is inserted into the inner hole 5 e of the flexible connection fitting 5. Then, the inner wall 5b of the flexible connection fitting 5 comes into contact with the protrusion 5a and fits into the protrusion 5a.
Is screwed into the concave portion on the outer surface of the seamless tube 8 to be fitted therein, and the inner wall 5b of the flexible connection fitting 5 and the outer surface portion of the seamless tube 8 are directly fixed by brazing.

A stepped portion 3c is provided so as to protrude from the inner surface of the tubular pipe flexible connection fitting main body 3, and an external thread 3d is provided on the outer periphery of the distal end portion. The distal end of one end protruding portion 5a of the flexible connection fitting 5 is inserted into the inner hole 3e at one end of the pipe flexible connection fitting main body 3 via the oil-resistant packing 7, and the distal end is connected to the pipe flexible connection fitting. While pressing against the stepped portion 3c protruding from the inner surface of the main body 3, the flange 5d provided on the outer periphery of the middle part of the flexible connection fitting 5 is brought into contact with the end edge of the pipe flexible connection fitting main body 3, and An inner screw 1a of the helmet nut 1 is screwed to an outer screw 3d provided on an outer peripheral surface of an end portion of the connection fitting main body 3, and is tightened and fixed via the flange 5d.

On the other hand, a ring-shaped helmet nut 6 having an internal screw 6a to be screwed into an external thread 3a provided on the outer surface of the other end of the pipe flexible connection fitting main body 3 is provided. The distal end portion of the conduit tube H to be connected, which is screwed through the rubber packing 2 which is fitted into and abutted on the end surface recess, and which is fitted into the inside diameter of the other end of the tube flexible connection main body 3, The outer wall of the conduit tube H is disposed in contact with the stepped portion 3c, and the outer wall of the conduit tube H is fastened by a set bolt 9 which is screwed through the cylindrical wall 3b near the outer screw 3a on the outer peripheral surface of the flexible connection fitting body 3 and pressed. This is a connecting device for the flexible conduit 8 having a structure that can be fixed.

As described above, the connecting device for the flexible conduit 8 of the first invention is wound in a bellows shape or a spiral shape made of a metal such as a flexible stainless steel so as to maintain flexibility and be integrated. One end of the formed conduit 8 is inserted into the inner hole 5e of the flexible connection fitting 5, and the raised screw 5c provided on the inner wall 5b of the flexible connection fitting 5 is screwed into the outer surface recess of the seamless tube 8 and fitted. Since they have been joined and fixed by direct brazing, the connection between the two is firmly connected by the raised screw 5c and the recess of the conduit 8, and the conduit 8 and the inner wall 5b of the flexible connection fitting 5 are further placed thereon. Since the gap between the two is filled with solder and a double fixing means is taken, even if a large external force is applied, the connection can be strengthened while maintaining flexibility, and after installation, Even if a large external force is applied Also conduit 8 and flexible connection fitting 5
The connection with the wire does not come off, and the electric wire inside the conduit is protected.

In another embodiment of the second invention shown in FIGS. 2 and 3, an inner screw 11a screwed to an outer screw 3'a provided on the outer peripheral surface of the other end of the pipe flexible connection fitting body 3 'is provided. The ring-shaped lock nut 11 is a flexible conduit connecting device that can be screwed and fixed via the cushion rubber ring 4 and the electrical device mounting wall 12.

Therefore, the conduit portion 8 of the seamless tube is firmly fixed at the base of the pipe flexible connection fitting main body 3 ', and can maintain strict watertightness. It is completely shut off, eliminating the ingress of water like a conventional conduit. In addition, the conduit 8 of the present invention, as shown by a dashed line (virtual line) in the figure, maintains tight sealing,
Needless to say, it has the flexibility to bend freely according to the internal electric wire.

Further, the construction described above allows the connection with the conduit tube H or the connection to the mounting wall of the electric equipment to be performed in a short time and safely and reliably, thereby reducing the construction cost.

FIG. 4 shows a connecting device for a flexible conduit according to a third aspect of the present invention, wherein a curved conduit connection is provided between the flexible conduit 8 and a conduit (not shown) to be connected. An apparatus in which the apparatus main body 13 is arranged and combined, wherein an external screw 13a provided outside a curved flange 13b provided at an outer end of a curved distal end.
And the lock nut 11 via the buffer ring washer 4
This is an embodiment in which the inner screw 11a is screwed and tightened to connect and connect. The present invention can be effectively used as such an application example.

As shown in FIG. 5, the connecting device for the flexible conduit 8 of the fourth invention is provided on the inner thread 23a provided on the other end of the straight pipe flexible connection fitting main body 23 and on the conduit tube H '. This is a connection device for the flexible conduit 8 having a structure in which the external screw 19 is screwed and connected.

Therefore, the conduit portion 8 of the seamless tube is firmly fixed at the base of the pipe flexible connection fitting main body 23, and can maintain strict watertightness. It is completely shut off, and the intrusion of water like a conventional conduit is completely eliminated. The conduit 8 of the fourth invention is, as shown by a dashed line (virtual line) in the figure, flexible while keeping tightly sealed and freely bending according to the internal electric wire. Needless to say.

Further, with the above structure, the conduit tube H '
The connection with the cable can be performed safely and securely in a short time while maintaining the flexibility, so that the construction cost can be reduced.

The present invention also provides a flexible conduit of this type which eliminates the use of a synthetic resin material such as PVC which is structurally used for the outer cover, and has an inherent waterproof property. With this structure, it is possible to avoid the generation of toxic gas from the jacket, and it is possible to secure the waterproofness and flexibility of conventional flexible conduits, Even in a closed environment such as in a tunnel, the dangers of fires and other accidents and the generation of toxic gas have been eliminated, which has contributed to improving safety.

The flexible conduit connecting device according to the first and fourth aspects of the present invention connects the conduit 8 to separate conduits H and H 'by the structure described above. It is also possible to use a steel plate or the like in place of the stainless steel described above to form a seamless tube 8 of a conduit which is formed integrally with a bellows shape or spiral shape while maintaining flexibility.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be implemented with appropriate modifications within a range having the following effects.

[0027]

As is clear from the above description, since the flexible conduit connecting device of the present invention is formed as an integral bellows-like or spiral-shaped seamless tube as a whole, it is flexible. And the end of the seamless tube is screwed into the outer surface recess of the seamless tube 8 by screwing a raised screw 5c provided on the inner wall 5b of the flexible connection fitting 5 into the flexible connection fitting 5, Since the outer surface is directly brazed and fixed, the flexible connection fitting 5 and the seamless tube 8 are firmly connected to each other, and can maintain strict watertightness.
The inside and outside of the conduit are completely shut off, and a tight seal can be maintained.

Further, the above-mentioned structure enables labor saving at the time of construction, and the use of a metal fitting structure and a connecting device for connecting to a thick steel conduit without a thick steel screw makes it possible to achieve a special skill, It has a remarkable effect that requires no special tools and can perform safe and secure construction in a short time, which cannot be expected from the conventional one.

At the time of construction, there are many cases in which both wiring conduit receptacles are not always in a straight line.
Further, even when the mounting angles are steeply opposed to each other, in the flexible conduit connecting device of the present invention, flexibility is required to push and protect the wires inside. This makes it easy to insert and tighten the wires, etc., or after installation, the sealed structure prevents accidents on the outer sheath of the wires, fires, etc., oil droplets or moisture, and erosion. This has eliminated the danger of generating toxic gases and has the potential to contribute to improving safety.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a flexible conduit connecting device according to the first invention.

FIG. 2 is a longitudinal sectional view of a connecting device for a flexible conduit showing an embodiment of the second invention.

FIG. 3 is a longitudinal sectional view of a flexible conduit connecting device showing an application example of FIG. 2;

FIG. 4 shows a flexible conduit showing an application example of the third invention,
The longitudinal section of the connecting device with the curved pipe connecting device main part.

FIG. 5 is a longitudinal sectional view of a flexible conduit connecting device according to a fourth invention.

FIG. 6 is a longitudinal sectional end view of a conventional example.

[Description of Signs] 1 Float nut 1a Internal screw 2 Rubber packing 3, 3 'Pipe connection device main body 3a External screw 3b Cylindrical wall 3c Step 3d External screw 3e Internal hole 4 Buffer ring 5 Flexible connection fitting 5a Bend 5b Inner wall 5c Raised screw 5d Flange 5e Inner hole 6 Float nut, 6a Inner screw 7 Packing 8 Conduit (seamless tube) 9 Set bolt 11 Lock nut 12 Mounting wall of electrical equipment 13 Curved pipe connection device body 13a, 13d Outer screw 13b Flange 13c Step 13e Inner hole 18 Conventional flat S-shaped strip steel 19 Seam 20 Conventional conduit 23 Pipe connection device main body 23a Inner screw 23c Flange 23d Outer screw 23e Inner hole 29 Outer screw H, H 'Conduit tube

Claims (4)

[Claims] An end of a seamless tube (8) of a conduit formed of metal and integrally formed in a bellows shape or a spiral shape while maintaining flexibility is connected to an inner hole of a tubular flexible connection fitting (5). (5e), the flexible connection fitting (5)
Screw the protruding screw (5c) provided on the inner wall (5b) into the concave part on the outer surface of the seamless tube (8), and project one end of the flexible connection fitting (5) inward to form an eaves-like shape. The inner wall (5b) of the flexible connection fitting (5)
And the outer surface of the seamless tube (8) are directly brazed and fixed, and the tip of the protrusion (5a) of the flexible connection fitting (5) is
Insert the flexible tube fitting (3) into the insertion hole (3e) at one end of the flexible tube fitting (3) via the packing (7).
The flange (5d) provided on the outer periphery of the middle abdomen of the flexible connection fitting (5) is brought into contact with the step (3c) protruding from the inner surface of the The outer screw (3d) provided on the outer peripheral surface of the end
(1a) is screwed and fixed, and an inner screw is attached to an outer screw (3a) provided on the outer surface of the other end of the pipe flexible connection fitting main body (3).
A ring-shaped fukuro nut (6) provided with (6a) is screwed through a rubber packing (2) which is fitted into and abutted on an end face concave portion of the pipe flexible connection fitting body (3), and is connected to the pipe flexible connection fitting body. The distal end of the conduit (H) is fitted into the inside diameter of the other end of (3), and abuts against the step (3c) of the tube flexible connection fitting main body (3), thereby removing the outer wall of the conduit (H). A flexible structure having a structure such that the outer wall of the flexible connection fitting body (3) can be fixed by being tightened and fixed by a set bolt (9) which is screwed through the cylindrical wall (3b) near the outer screw (3a) and pressed. Sex conduit connection device. 2. One end of a seamless tube (8) of a conduit formed of metal and integrally formed in a bellows shape or spiral shape while maintaining flexibility is connected to an inner hole of a tubular flexible connection fitting (5). (5e), the flexible connection fitting (5)
Screw the protruding screw (5c) provided on the inner wall (5b) into the concave part on the outer surface of the seamless tube (8), and project one end of the flexible connection fitting (5) inward to form an eaves-like shape. The inner wall (5b) of the flexible connection fitting (5)
And the outer surface of the seamless tube (8) are directly brazed and fixed, and the tip of the protrusion (5a) of the flexible connection fitting (5) is
Insert through the packing (7) into the insertion hole (3'e) at one end of the pipe flexible connection fitting body (3 '), and
The flange (5d) provided on the outer periphery of the middle abdomen of the flexible connection fitting (5) is brought into contact with the step (3'c) protruding from the inner surface of the (3 '), and the pipe flexible connection fitting body (3 A), the inner screw (1a) of the helmet nut (1) is screwed into the outer screw (3'd) provided on the outer peripheral surface of the end, and tightened and fixed. To the external screw (3'a) provided on the outer peripheral surface of the other end of the connection fitting body (3 '),
A ring-shaped lock nut (11) with an internal screw (11a) to be screwed into
(12) A connecting device for a flexible conduit having a structure capable of being screwed and fixed through (12). 3. An end of a seamless tube (8) of a conduit formed of metal and integrally formed in a bellows shape or spiral shape while maintaining flexibility, is connected to an inner hole of a tubular flexible connection fitting (5). (5e), the flexible connection fitting (5)
Screw the protruding screw (5c) provided on the inner wall (5b) into the concave part on the outer surface of the seamless tube (8), and project one end of the flexible connection fitting (5) inward to form an eaves-like shape. The inner wall (5b) of the flexible connection fitting (5)
And the outer surface of the seamless tube (8) are directly brazed and fixed, and the tip of the protrusion (5a) of the flexible connection fitting (5) is
A step (13c) that is inserted into the insertion hole (13e) at one end of the curved pipe flexible connection main body (13) through the packing (7) and protrudes from the inner surface of the curved pipe flexible connection main body (13). ),
A flange (5d) provided on the outer periphery of the middle abdomen of the flexible connection fitting (5),
Abutting against the edge of the curved pipe flexible connection fitting body (13),
An inner screw (1a) of a sash nut (1) is screwed and fixed to an external screw (13d) provided on an outer peripheral surface of an end portion of the curved pipe flexible connection fitting body (13). Body (13)
A ring-shaped lock nut (11) provided with an internal screw (11a) to be screwed into an external screw (13a) provided on the outer peripheral surface of the other end of the screw nut via a cushion rubber packing (4). A flexible conduit connecting device structured so that it can be fixed. 4. An end of a seamless tube (8) of a conduit formed of metal and integrally formed in a bellows shape or spiral shape while maintaining flexibility, is connected to an inner hole of a cylindrical flexible connection fitting (5). (5e), the flexible connection fitting (5)
Screw the protruding screw (5c) provided on the inner wall (5b) into the concave part on the outer surface of the seamless tube (8), and project one end of the flexible connection fitting (5) inward to form an eaves-like shape. The inner wall (5b) of the flexible connection fitting (5)
And the outer surface of the seamless tube (8) are directly brazed and fixed, and the tip of the protrusion (5a) of the flexible connection fitting (5) is
Insert through the packing (7) into the insertion hole (23e) at one end of the pipe flexible connection fitting body (23), and
The flange (5d) provided on the outer periphery of the middle abdomen of the flexible connection fitting (5) is brought into contact with the step (23c) projecting from the inner surface of the (23), and the end of the pipe flexible connection fitting body (23). An external screw provided on the outer peripheral surface of the end of the pipe flexible connection fitting main body (23) in contact with the edge.
(23d), screw and fix the inner screw (1a) of the owl nut (1) by screwing it in. A flexible conduit having a structure in which a distal end portion of a conduit (H ′) provided with an external screw (29) screwed to the internal screw (23a) is fitted, screwed and connected. apparatus.