JPH0671994U - Flexible Tube - Google Patents

Abstract

(57) [Abstract] [Purpose] The tube body and the blade are easy to manufacture and can be reliably and firmly joined to the tubular body such as a joint, and the tube body and the blade are inadvertently removed from the tubular body. The purpose is to provide a flexible tube that does not come off. A flexible tube body 1 having a straight tube portion 3 formed at an end thereof, a blade 4 externally fitted to the tube body 1, a tubular body having one end fitted and inserted into the tube body 1, It is characterized by comprising a pressing ring 13 for pressing and fixing the tube body 1 together with the blade 4 on the outer peripheral surface of the tubular body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a flexible tube used for general piping.

[0002]

[Prior art]

 In general, this kind of flexible tube has been widely used for various pipes because it can absorb bending and twisting during piping work easily and can perform piping work easily. For example, there are those as shown in FIG.

That is, in this conventional one, a large number of bulging portions 2a are formed in the flexible tube body 1a, and a protective blade 4a is externally fitted to the tube body 1a. The tube body 1a is joined to the pipe 16 by welding together with the ring 15 fitted on one end of the blade 4a.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the pipe 16 and the tube body 1a and the like are joined by welding, there is a problem in that the work is extremely complicated and the productivity is remarkably lacking. However, there is also a drawback that a high degree of skill is required for such welding work.

Further, since the position of the tube body 1a located in the vicinity of the welded portion A is hardened due to the influence of heat due to welding, when the tube main body 1a is vibrated due to the flow of fluid, the above-mentioned hardened portion is removed from the hardened portion. It also had the inconvenience that cracks tended to occur, and as a result the fluid leaked from these cracks.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and its manufacture is extremely easy, and the flexible tube body and the blade are securely and firmly formed into a tubular body such as a joint. The challenge is to provide a flexible tube with excellent durability that can be joined.

[0007]

[Means for Solving the Problems]

 That is, in order to solve the above problems, the present invention provides a flexible tube body 1 having a straight tube portion 3 formed at an end thereof, a blade 4 externally fitted to the tube body 1, and the tube body 1 described above. A flexible tube comprising a tubular body having one end fitted therein and a pressing ring 13 for pressing and fixing the tube body 1 together with the blade 4 on the outer peripheral surface of the tubular body.

[0008]

[Action]

 Therefore, in the flexible tube having the above-mentioned structure, since the straight tube portion 3 of the tube body 1 and the blade 4 are pressed and fixed to the outer peripheral surface of the tubular body 5 by the pressing ring 13, When the pressing ring 13 is attached, the tubular body 5 itself plays a role as a core material, so that the pressing ring 13 can be easily and surely attached, and as a result, the tube body 1 and the blade 4 are attached to the tubular body 5. It will be joined firmly.

[0009]

【Example】

 An embodiment of the flexible tube according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a flexible tube main body made of thin-walled stainless steel. A large number of bulging portions 2 are continuously provided on the peripheral surface of the tube main body 1, and both ends are directly connected to each other. Each of the tube portions 3 is formed.

Reference numeral 4 denotes a tubular blade that is externally fitted to the tube body 1, and is formed by knitting wire strands. As shown in FIG. 2, reference numeral 5 denotes a joint having a groove 7 formed on the outer peripheral surface on one end side to which a sealing O-ring 6 can be mounted, and a screw portion 8 is engraved on the outer peripheral surface on the other end side. On the outer peripheral surface at the inner position of the groove 7, a locking portion 9 formed of a groove is formed all around.

Reference numeral 10 denotes a short pipe connected to the other end of the tube body 1, and a concave groove 11 into which the O-ring 6 can be mounted is provided in the outer peripheral surface of the connecting end as shown in FIG. A locking portion 12 formed of a groove is formed on the outer peripheral surface of the groove 11 at an inner position.

Reference numeral 13 is a pressing ring for crimping the straight pipe portion 3 of the tube body 1 together with the blade 4 to one end side of the joint 5 or the short pipe 10 to press and fix the same, and the locking portion 9 of the joint 5 or the short pipe 10. A locking portion 14 is provided on the inner peripheral edge of one end of the pressing ring 13 so as to engage the first and second portions.

The present embodiment is configured as described above, and such a flexible tube is used as a hydraulic pipe in a press machine or the like in which a fluid having a flow velocity flows. Since the end portion is to be fixed by caulking the pressing ring 13 in a state of being fitted onto one end side of the joint 5 or the short pipe 10, when the pressing ring 13 is mounted, the joint 5 and the short pipe 10 themselves are Each of them plays a role as a core material, so that there is an advantage that the caulking work can be performed very easily and surely.

As a result, the tube body 1 and the blade 4 are firmly pressed and fixed by the pressing ring 13, and the locking portion 14 provided on the pressing ring 13 and the locking portions 9 of the joint 5 and the short pipe 10 are provided. 12 and 12 are engaged with each other, and the pressing ring 13 is prevented from being accidentally disengaged.

Therefore, even if the tube body 1 receives vibration or the like due to the flow of the fluid, the tube body 1 and the blade 4 will not be pulled out from the joint 5 and the short tube 10, and the tube can be used for a long period of time. It will have durability.

Further, since the flexible tube according to the present embodiment has a very simple structure, it has an advantage that it can be manufactured easily and at low cost.

In the embodiment described above, the engaging portions 9 and 12 formed of the concave grooves formed on the outer peripheral surfaces of the joint 5 and the short pipe 10 are provided with the engaging portions 14 provided on the inner peripheral edge of the pressing ring 13. The engagement of the locking ring 9 prevents the pressing ring 13 from coming off and prevents the tube body 1 and the blade 4 from being accidentally pulled out from the joint 5 and the short tube 10. It is not always necessary to provide the recessed groove as 12,12 or the locking portion 14.

When the locking portions 9 and 12 are provided on the tubular body, for example, instead of the concave groove, a projection capable of engaging with the locking portion 14 of the pressing ring 13 may be provided. The specific configuration of the locking portions 9, 12 does not matter.

Further, in this embodiment, the joint 5 was connected to one end of the tube body 1 and the blade 4 and the short pipe 10 was connected to the other end, but the tubular body is not limited to these. Instead, the present invention can be applied to the case where the tube body 1 is connected to a flange or the like.

In addition, the specific configuration of the blade 4 can be arbitrarily changed in design within the scope intended by the present invention.

[0022]

[Effect of device]

 As described above, the present invention does not join the tube body and the tubular body by welding as in the past, but merely presses and fixes the tube body together with the blade on the outer peripheral surface of the tubular body by the pressing ring. Therefore, the joining work can be performed extremely easily, and the productivity is greatly improved.

Further, since it is not affected by heat due to welding as in the conventional case, even if the tube body receives an external force such as bending or vibration, the tube body is not cracked. There is also an effect.

Moreover, when the pressing ring is attached, the tubular body itself plays a role as a core material, so that the pressing ring can be attached very easily and reliably. There is also an advantage that the joint with the tubular body becomes strong.

[Brief description of drawings]

FIG. 1 is a half-cut sectional view showing an embodiment of a flexible tube according to the present invention.

FIG. 2 is an enlarged half-cut sectional view of the same main part.

FIG. 3 is an enlarged half-cut sectional view of the same main part.

FIG. 4 is a half-cut sectional view showing a conventional example.

[Explanation of symbols]

 1 ... Flexible tube main body 3 ... Straight tube part 4 ... Blade 6 ... Seal member 13 ... Pressing ring 14 ... Locking part

Claims (3)

[Scope of utility model registration request] 1. A flexible tube body (1) having a straight tube portion (3) formed at an end thereof, a blade (4) externally fitted to the tube body (1), and the tube body (1). A tubular body having one end inserted into the tubular body, and the blade on the outer peripheral surface of the tubular body.
A flexible tube comprising (4) and a pressing ring (13) for pressing and fixing the tube body (1). 2. The flexible tube according to claim 1, wherein a concave groove into which an annular seal member (6) can be mounted is formed in an outer peripheral surface on one end side of the tubular body in a circumferential direction. 3. A pressing ring (13) is provided on the outer peripheral surface of the tubular body.
The flexible tube according to claim 1 or 2, wherein a locking portion with which the locking portion (14) formed on the inner peripheral edge of the is engaged.