JP2016006343A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint capable of preventing or suppressing generation of large wrinkling or cracking on a caulking portion, even when a hose having an outer diameter small with respect to an inner diameter of the caulking portion is fastened.SOLUTION: A joint 10 includes a joint body 12 to which an end inner side of a flexible hose 14 is inserted, and which includes a core portion 12A kept into contact with an inner peripheral face of the hose 14, and a metallic caulking portion 16 extended along the core portion 12A of the joint body 12. A pipe 18 is disposed between the hose 14 inserted to an outer peripheral side of the core portion 12A and the caulking portion 16. By caulking the caulking portion 16, the pipe 18 is caulked to a core portion 12A side with the caulking portion 16, and the hose 14 inserted to the outer peripheral side of the core portion 12A is fixed to the core portion 12A.

Description

  The present invention relates to a joint.

  Conventionally, a joint for fixing an end portion of a hose to a joint body by caulking is known.

  Patent Document 1 listed below discloses a joint provided with a hose connection part (core part) on one end side in the axial direction of the joint body and a fastener provided along the hose connection part on the outer peripheral side of the hose connection part. ing. In this joint, the hose is fixed to the hose connection part by inserting the hose between the hose connection part of the joint body and the fastener and crimping the fastener from the outer peripheral side of the fastener.

JP 2008-25762 A (for example, FIGS. 9 and 11)

  Conventionally, the combination of one joint for one hose was the basic. However, at present, in order to reduce the inventory of joints and improve costs, the consolidation of joints has progressed, and for the hoses with the same inner diameter among various hoses, the same joint as much as possible is often applied.

  At that time, there is almost no problem in the combination with a joint having a moderate inner diameter of the hose with respect to the outer diameter of the hose, but if the outer diameter of the hose is smaller than the inner diameter of the fastener, When the hose is crimped, the appearance and quality may be impaired.

  For example, in the joint disclosed in Patent Document 1, when a fastener having a large inner diameter is used for tightening a hose having a small outer diameter, the amount of tightening of the fastener is large, resulting in a large wrinkle on the surface of the fastener. And cracking may occur.

  The present invention has been made in view of the above-mentioned problems, and prevents a large wrinkle or crack from occurring in the caulking portion when a hose having a small outer diameter relative to the inner diameter of the caulking portion is tightened or It aims at providing the joint which can be suppressed.

  In order to solve the above problems, the joint according to the first aspect of the present invention is a joint body including a core part into which the inner side of the hose is in contact with the inner side of the end of the flexible hose. And a caulking part made of metal that is provided on the joint main body and extends along the core part, and fastens and fixes the hose inserted on the outer peripheral side of the core part to the core part side. And a filling member that is disposed between the crimped portion and the hose inserted on the outer peripheral side of the core portion and is crimped together with the crimped portion to the core portion side.

  According to invention of Claim 1, the inner peripheral surface of a hose contacts the core part of a joint main body because the edge part inner side of a flexible hose is inserted in the core part of a joint main body. The joint body is provided with a metal caulking portion extending along the core portion, and a filling member is disposed between the caulking portion and the hose inserted on the outer peripheral side of the core portion. Yes. In this state, the hose inserted on the outer peripheral side of the core portion is crimped to the core portion side by the metal crimping portion, so that the filling member is crimped to the core portion side together with the crimped portion. And a hose is fixed to a core part with a filling member.

  In this joint, since the filling member is disposed between the crimping portion and the hose inserted on the outer peripheral side of the core portion, when the hose is crimped by the crimping portion and the filling member, An increase in the tightening amount is suppressed. For this reason, even when the outer diameter of the hose is smaller than the inner diameter of the crimping portion, it is possible to prevent or suppress the occurrence of large wrinkles and cracks on the surface of the crimping portion.

  According to a second aspect of the present invention, in the joint according to the first aspect, the filling member has a length equal to or less than a length in an axial direction of a region in which the inner side of the end of the hose in the caulking portion is inserted. It is a set pipe.

  According to invention of Claim 2, a filling member is a pipe set to the length below the axial direction length of the area | region where the edge part inner side of the hose in a crimping part is inserted, and a crimping part And the hose can be tightened more effectively by the pipe. In addition, the pipe is set to a length that is less than or equal to the axial length of the region where the inside of the hose end is inserted in the caulking portion, thereby preventing the end of the pipe from being exposed from the caulking portion. Or suppressed. For this reason, an external appearance can be improved more reliably at the time of fastening of a crimping part.

  According to a third aspect of the present invention, in the joint according to the first or second aspect, a plurality of protrusions that protrude toward the hose side along the axial direction are formed on the inner surface of the caulking portion. .

  According to the third aspect of the present invention, the inner surface of the caulking portion is formed with a plurality of protrusions protruding toward the hose along the axial direction, and the hose can be tightened by the plurality of protrusions.

  According to a fourth aspect of the present invention, in the joint according to any one of the first to third aspects, the inner surface of the filling member has a plurality of protrusions protruding toward the hose side along the axial direction. The part is formed.

  According to the fourth aspect of the present invention, since the inner surface of the filling member is formed with a plurality of convex portions protruding toward the hose along the axial direction, the filling member is added to the hose side together with the crimped portion. When tightened, the plurality of convex portions of the filling member bite into the hose. For this reason, even when the joint is used at a high pressure, the tightening quality of the hose can be maintained by the plurality of convex portions of the filling member.

  The invention according to claim 5 is the joint according to claim 4, wherein the plurality of convex portions are inclined toward the insertion port side of the hose and projecting toward the hose side, A second inclined portion that inclines so as to recede from the top of the first inclined portion to the opposite side of the hose, and the angle of the first inclined portion with respect to the axial direction of the filling member is It is larger than the angle of the second inclined portion with respect to the axial direction.

  According to the fifth aspect of the present invention, the first inclined portion that inclines toward the hose insertion port side and protrudes toward the hose side, and retreats from the top of the first inclined portion to the opposite side of the hose. And an angle of the first inclined portion with respect to the axial direction of the filling member is larger than the angle of the second inclined portion. For this reason, when pressure is applied in the direction in which the hose is pulled out, the first inclined portion can more reliably suppress the hose from being pulled out.

  The invention according to claim 6 is the joint according to any one of claims 1 to 3, wherein the filling member is made of an aluminum alloy.

  According to the invention described in claim 6, since the filling member is formed of an aluminum alloy, it is relatively easy to plastically deform among metal materials. For this reason, when the crimping portion is crimped to the hose side, the filling member is easily plastically deformed according to the tightening of the crimping portion. Thereby, the tightening quality of the hose can be maintained without substantially impairing the internal shape of the crimped portion.

  According to a seventh aspect of the present invention, in the joint according to any one of the first to fifth aspects, the filling member is made of carbon steel.

  According to the seventh aspect of the present invention, the filling member is made of carbon steel, and thus has a higher strength than, for example, an aluminum alloy. Therefore, even when the joint is used at a high pressure, the tightening quality of the hose can be maintained by the filling member.

  According to the joint of the present invention, when a hose having a small outer diameter with respect to the inner diameter of the crimping portion is tightened, it is possible to prevent or suppress the occurrence of large wrinkles and cracks in the crimping portion.

FIG. 1 is a half cut sectional view showing a joint according to a first embodiment of the present invention. FIG. 2 is a half-cut sectional view showing a state in which the crimping portion and the pipe of the joint shown in FIG. 1 are crimped. FIG. 3 is a half cut sectional view showing a joint according to a second embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 shows a joint 10 according to a first embodiment of the present invention. As shown in FIG. 1, the joint 10 includes a metal joint body (metal body) 12 having a core 12 </ b> A into which the inner side of the end of the hose 14 is inserted on one end side in the axial direction, and the joint body. 12, and a metal caulking part (clamp) 16 that extends along the twelve core parts 12 </ b> A and is disposed outside the hose 14. Further, the joint 10 includes a pipe 18 as a filling member disposed between the caulking portion 16 and the hose 14 inserted on the outer peripheral side of the core portion 12A of the joint body 12.

  The joint body 12 is formed in a substantially cylindrical shape, and a flow path 12B through which a fluid (for example, a liquid) passes is formed. A protruding portion 12C having an outer diameter larger than the outer diameter of the core portion 12A is provided in an intermediate portion in the axial direction than the core portion 12A of the joint body 12. A groove 20 that is recessed radially inward is formed on the outer peripheral surface of the protrusion 12C. The caulking portion 16 is formed with a protruding portion 16A that protrudes radially inward on one end side in the axial direction, and the caulking portion 16 is engaged with the groove portion 20 of the joint body 12 by the protruding portion 16A. Attached to the protrusion 12C of the joint body 12.

  The inner peripheral surface of the hose 14 is in contact with the core 12 </ b> A of the joint body 12 by inserting the inside of the end of the flexible hose 14. The axial end of the core portion 12A of the joint body 12, that is, the insertion end side into the hose 14 is tapered, so that the inside of the hose 14 can be easily inserted into the core portion 12A. When the hose 14 is inserted between the core portion 12 </ b> A, the caulking portion 16, and the pipe 18, the hose 14 can be inserted until the tip end portion 14 </ b> A of the hose 14 contacts the side wall of the protrusion 12 </ b> C of the joint body 12.

  On the outer peripheral surface of the core portion 12A, a sawtooth portion 22 having a sawtooth shape in sectional view is formed. In the present embodiment, the tooth direction of the sawtooth portion 22 is formed such that the inclination angle in the pull-out direction of the hose 14 is larger than the inclination angle in the insertion direction of the hose 14 with respect to the axial direction of the core portion 12A. . That is, the direction of the teeth of the sawtooth portion 22 is configured such that resistance is generated against inadvertent disconnection of the hose 14 in a state where the inside of the hose 14 is inserted into the core portion 12A. In addition, you may change the angle of the tooth | gear of the sawtooth part 22 with respect to the axial direction of 12 A of core parts.

  On the opposite side of the caulking portion 16 from the protruding portion 16A, the outer diameter of the core portion 12A of the joint body 12 is arranged along the core portion 12A, and the outer diameter is larger than the outer diameter of the protruding portion 16A. A portion 16B is provided. A plurality of protrusions 24 are formed on the inner surface of the large-diameter portion 16B so as to protrude radially inward along the axial direction of the caulking portion 16. The plurality of protrusions 24 are formed from a first inclined portion 24A inclined toward the insertion port side of the hose 14 (the distal end side of the crimping portion 16) and protruding toward the hose 14, and from the top of the first inclined portion 24A. And a second inclined portion 24B that is inclined so as to retreat to the opposite side to the hose 14. In the present embodiment, the angle of the first inclined portion 24A with respect to the axial direction of the caulking portion 16 (the angle of the hose 14 in the removal direction) is the angle of the second inclined portion 24B with respect to the axial direction of the caulking portion 16 (of the hose 14). It is set larger than the angle in the insertion direction. Thereby, in the state which crimped the crimping part 16 with the pipe 18 to the hose 14 side, it is comprised so that resistance may arise with respect to the direction which the hose 14 pulls out by 24 A of 1st inclination parts. The angle of the first inclined portion 24A with respect to the axial direction of the caulking portion 16 and the angle of the second inclined portion 24B with respect to the axial direction of the caulking portion 16 may be changed.

  The pipe 18 is made of a substantially cylindrical member, and has an inner diameter and an outer diameter that are substantially uniform with respect to the axial direction of the pipe 18. When the outer diameter of the hose 14 is smaller than the inner diameter of the large-diameter portion 16B of the caulking portion 16, the pipe 18 is inserted into the outer peripheral side of the caulking portion 16 and the core portion 12A of the joint body 12. Is inserted (arranged) between.

  The pipe 18 is formed of a material that is relatively easily plastically deformed among metal materials, for example. In the present embodiment, the pipe 18 is made of an aluminum alloy. In addition, the pipe 18 is obtained by simply cutting a long pipe made of aluminum alloy in consideration of cost, tightening standards, and the like.

  The length of the pipe 18 in the axial direction is set to be shorter than the length in the axial direction of the region where the inside of the end of the hose 14 in the crimping portion 16 is inserted. Thereby, the pipe 18 is disposed between the crimping portion 16 and the hose 14 inserted on the outer peripheral side of the core portion 12A of the joint main body 12, and the tip of the crimping portion 16 (the insertion port of the hose 14). The end of the pipe 18 in the axial direction is not exposed from the side.

  As shown in FIG. 2, the large diameter portion 16 </ b> B of the crimping portion 16 is crimped from the outer peripheral side to the hose 14 side, whereby the pipe 18 is crimped together with the large diameter portion 16 </ b> B of the crimping portion 16. The hose 14 is pressed and fixed to the core 12 </ b> A of the joint body 12 by the portion 16 and the pipe 18. That is, when the outer diameter of the hose 14 is smaller than the inner diameter of the large-diameter portion 16B of the caulking portion 16, the pipe 18 is a part of the space between the large-diameter portion 16B of the caulking portion 16 and the hose 14. (See FIG. 1).

  In this embodiment, since the pipe 18 is made of an aluminum alloy, when the large-diameter portion 16B of the crimping portion 16 is crimped to the hose 14 side, the large-diameter portion 16B of the crimping portion 16 is tightened. The pipe 18 is easily plastically deformed. Accordingly, a plurality of protrusions (convex portions) are formed on the inner surface of the pipe 18 corresponding to the plurality of protrusions 24 of the large diameter portion 16B of the caulking portion 16. This joint 10 is suitable when the operating pressure is low (for example, 7 MPa or less).

  In addition, although illustration is abbreviate | omitted, the connection part to which another piping is connected is provided in the other end part (the side opposite to the crimping part 16) of the axial direction of the coupling main body 12. FIG. The configuration of the connection portion is not particularly limited, and for example, a male screw portion or a nut having a female screw portion can be applied.

  Next, the operation and effect of the joint 10 of the present embodiment will be described.

  As shown in FIG. 1, in the joint 10, the inner peripheral surface of the hose 14 is in contact with the core 12 </ b> A of the joint body 12 by inserting the inner end of the hose 14 into the core 12 </ b> A of the joint body 12. . In this joint 10, when the outer diameter of the hose 14 is smaller than the inner diameter of the large-diameter portion 16B of the caulking portion 16, the hose inserted on the outer peripheral side of the large-diameter portion 16B of the caulking portion 16 and the core portion 12A. The pipe 18 is inserted between the two.

  In this state, as shown in FIG. 2, the large diameter portion 16B of the crimping portion 16 is crimped from the outer peripheral side to the hose 14 side. As a result, the pipe 18 is crimped together with the large-diameter portion 16B of the crimping portion 16, and the hose 14 is pressed and fixed to the core portion 12A of the joint body 12 by the crimping portion 16 and the pipe 18.

  In this joint 10, the pipe 18 is disposed between the large diameter portion 16 </ b> B of the crimping portion 16 and the hose 14 inserted on the outer peripheral side of the core portion 12 </ b> A. It is suppressed that the tightening amount of the large-diameter portion 16B of the crimping portion 16 is increased when the crimping is performed. For this reason, when the outer diameter of the hose 14 is smaller than the inner diameter of the large-diameter portion 16B of the caulking portion 16, it is possible to prevent or suppress the occurrence of large wrinkles and cracks on the surface of the caulking portion 16. . Therefore, the external shape of the joint 10 can be improved after the large-diameter portion 16B of the caulking portion 16 is tightened.

  In this joint 10, the length of the pipe 18 in the axial direction is shorter than the length in the axial direction of the region where the inner side of the end of the hose 14 in the crimping portion 16 is inserted. For this reason, it is possible to prevent or suppress the end portion of the pipe 18 in the axial direction from being exposed from the tip of the crimping portion 16 (on the insertion port side of the hose 14) when the crimping portion 16 is tightened. For this reason, the external appearance of the joint 10 can be more reliably improved when the caulking portion 16 is tightened.

Furthermore, in this joint 10, the pipe 18 is formed of an aluminum alloy. For this reason, when the large diameter portion 16B of the crimping portion 16 is crimped to the hose 14 side, the pipe 18 is easily plastically deformed according to the tightening of the large diameter portion 16B of the crimping portion 16. For this reason, as shown in FIG. 2, the pipe 18 is deformed by being pushed by the plurality of protrusions 24 of the large-diameter portion 16 </ b> B of the caulking portion 16. Projections (convex parts) are formed. Thereby, the fastening quality of the hose 14 can be maintained without substantially impairing the internal shape of the large-diameter portion 16B of the crimping portion 16.
Such a joint 10 has a working pressure of, for example, 7 MPa or less and is suitable for a small lot quantity.

  According to the present embodiment, the consolidated joint 10 can be used as it is for various types of hoses having the same inner diameter. For this reason, the cost can be reduced and the management of the joint 10 is facilitated as compared with the case where various kinds of joints are prepared. In addition, the same die can be applied when the caulking portion 16 of the joint 10 and the hose are tightened.

[Second Embodiment]
Next, the joint 30 which is 2nd Embodiment of this invention is demonstrated using FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 3, the joint 30 includes a metal joint body 12 having a core portion 12 </ b> A into which the inner end of the hose 14 is inserted on one end side in the axial direction, and a core portion of the joint body 12. A metal caulking portion 16 that extends along 12A and is disposed outside the hose 14, and between the caulking portion 16 and the hose 14 that is inserted on the outer peripheral side of the core portion 12A of the joint body 12 And a pipe 32 serving as a filling member.

  When the outer diameter of the hose 14 is smaller than the inner diameter of the large diameter portion 16B of the caulking portion 16, the pipe 32 is inserted into the outer peripheral side of the caulking portion 16 and the core portion 12A of the joint body 12. Is inserted (arranged) between.

  The inner surface of the pipe 32 is processed into a shape simulating a plurality of protrusions 24 provided on the inner surface of the large diameter portion 16B of the caulking portion 16. More specifically, a plurality of convex portions 34 projecting radially inward along the axial direction of the pipe 32 are formed on the inner surface of the pipe 32. The plurality of convex portions 34 are directed to the insertion port side of the hose 14 (the distal end side of the crimping portion 16) and are inclined so as to protrude toward the hose 14, and the top portion of the first inclined portion 34A. And a second inclined portion 34B that is inclined so as to retreat to the opposite side to the hose 14. In the present embodiment, the angle of the first inclined portion 34A with respect to the axial direction of the pipe 32 (the angle of the hose 14 in the removal direction) is the angle of the second inclined portion 34B with respect to the axial direction of the pipe 32 (the angle of the insertion direction of the hose 14). ) Is set larger than. The angle of the first inclined portion 34A with respect to the axial direction of the pipe 32 and the angle of the second inclined portion 34B with respect to the axial direction of the pipe 32 may be changed.

  In such a pipe 32, the plurality of convex portions 34 bite into the outer peripheral surface of the hose 14 in a state where the crimping portion 16 and the pipe 32 are crimped to the hose 14 side. In that case, it is comprised by the 1st inclination part 34A of the some convex part 34 so that resistance may arise with respect to the direction which the hose 14 pulls out.

  Further, in the cross-sectional view of the joint 30, the plurality of convex portions 34 of the pipe 32 are preferably arranged in alignment with the plurality of protrusions 24 of the caulking portion 16 in the radial direction. As a result, when the crimping portion 16 is crimped to the hose 14 side, the plurality of protrusions 34 of the pipe 32 are easily bite into the outer peripheral surface of the hose 14 by being pushed by the plurality of protrusions 24 of the crimping portion 16. Become.

  The pipe 32 is made of, for example, carbon steel, for example, SC material (carbon steel for machine structure). Carbon steel has a higher strength than other metal materials and is suitable when high pressure acts on the joint 30. In the present embodiment, considering that the pipe 32 is used at a high pressure, for example, a pipe material corresponding to S10C to S20C is used. The numerical values of S10C and S20C indicate the carbon C content (C × 100 wt%).

  The length of the pipe 32 in the axial direction is set to be shorter than the length in the axial direction of the region where the inside of the end of the hose 14 in the crimping portion 16 is inserted. As a result, the pipe 32 is disposed between the caulking portion 16 and the hose 14 inserted on the outer peripheral side of the core portion 12A of the joint body 12, and the tip of the caulking portion 16 (the insertion port of the hose 14). The axial end of the pipe 32 is not exposed from the side.

  In such a joint 30, the large-diameter portion 16 </ b> B of the crimping portion 16 is crimped from the outer peripheral side to the hose 14 side, whereby the pipe 32 is crimped together with the large-diameter portion 16 </ b> B of the crimping portion 16. The hose 14 is pressed and fixed to the core 12 </ b> A of the joint body 12 by the pipe 16 and the pipe 32. In that case, since the some convex part 34 which protrudes in the hose 14 side is formed in the inner surface of the pipe 32, the some convex part 34 bites into the outer peripheral surface of the hose 14. Thereby, even if the coupling 30 is used at a high pressure, the tightening quality of the hose 14 can be maintained by the plurality of convex portions 34 of the pipe 32.

  Further, the angle of the first inclined portion 34A with respect to the axial direction of the pipe 32 is larger than the angle of the second inclined portion 34B with respect to the axial direction of the pipe 32. For this reason, when pressure is applied in the direction in which the hose 14 is pulled out, the first inclined portion 34A can more reliably suppress the hose 14 from being pulled out.

Furthermore, the pipe 32 is made of carbon steel, and has a higher strength than, for example, an aluminum alloy. For this reason, even if the joint 30 is used at a high pressure, the fastening quality of the pipe 32 to the hose 14 can be more reliably maintained.
This joint 30 is suitable for a small lot quantity when the working pressure is larger than 7 MPa, for example.

  According to the present embodiment, the aggregated joint 30 can be used as it is for various types of hoses having substantially the same inner diameter. For this reason, the cost can be reduced and the management of the joint 30 is facilitated as compared with the case where various kinds of joints are prepared. Further, the same die can be applied when fastening the crimping portion 16 of the joint 30 and the hose.

  In the first and second embodiments, the thickness of the hose, the thickness of the pipe, and the thickness of the large diameter portion 16B of the caulking portion 16 are not limited to the configuration of the embodiment, and can be changed. is there.

  Moreover, in 1st and 2nd embodiment, although a pipe is shorter than the axial length of the area | region where the edge part inner side of the hose in a crimping part is inserted, this invention is not limited to this. For example, the length of the pipe may be set to be substantially the same as the length in the axial direction of the region where the inside of the end portion of the hose in the caulking portion is inserted.

  Moreover, in 1st and 2nd embodiment, although the cylindrical pipe is arrange | positioned between a crimping part and a hose, this invention is not limited to a cylindrical pipe. For example, a member having another shape such as a member having a C-shaped cross-section with a part cut in the circumferential direction may be used. That is, the pipe of the present invention includes a member having a C-shaped cross section with a part of the circumferential direction cut away.

  In the first and second embodiments, the caulking portion is provided with a plurality of protrusions 24 having the first inclined portion 24A and the second inclined portion 24B, but the present invention is limited to the shape of the protrusion 24. Not what you want. For example, a plurality of protrusions having substantially the same angle of the first inclined portion 24A and the second inclined portion 24B with respect to the axial direction of the caulking portion may be provided on the inner surface of the caulking portion, or with respect to the axial direction of the caulking portion. A plurality of protrusions having a larger angle of the second inclined portion 24B than the first inclined portion 24A may be provided. Further, for example, a plurality of protrusions (uneven shape) having various shapes such as a substantially rectangular shape or a substantially U shape may be provided on the inner surface of the crimped portion. At this time, the angles of the plurality of protrusions with respect to the axial direction of the caulking portion can also be set as appropriate.

  Moreover, in 2nd Embodiment, although the some convex part 34 which has 34 A of 1st inclined parts and the 2nd inclined part 34B is provided in the pipe, this invention is not limited to the shape of this convex part 34. Absent. For example, a plurality of convex portions having substantially the same angle between the first inclined portion 34A and the second inclined portion 34B with respect to the axial direction of the pipe may be provided on the inner surface of the pipe, or the first inclined portion 34A with respect to the axial direction of the pipe. Alternatively, a plurality of convex portions having a larger angle of the second inclined portion 34B may be provided. Further, for example, a plurality of convex portions (concave and convex shapes) of various shapes such as a substantially rectangular shape or a substantially U shape may be provided on the inner surface of a filling member such as a pipe. In that case, the angle of the some convex part with respect to the axial direction of a filling member can also be set suitably.

  Furthermore, in the first and second embodiments, the caulking portion is directly attached to the joint body by the locking structure, but the present invention is not limited to this. For example, a configuration in which a caulking portion is attached to the joint body via an intermediate ring, or a configuration in which the caulking portion is attached to the joint body by a fastening structure using screws may be used.

10 Joint 12 Joint Body 12A Core 14 Hose 14A Tip (End)
16 Caulking part 18 Pipe (filling member)
24 Projection 30 Joint 32 Pipe (filling member)
34 Convex part 34A 1st inclination part 34B 2nd inclination part

Claims (7)

A joint body provided with a core part into which the inner end of the flexible hose is inserted and the inner peripheral surface of the hose contacts;
A metal caulking portion that is provided on the joint body, extends along the core portion, and clamps and fixes the hose inserted on the outer peripheral side of the core portion to the core portion side;
A filling member disposed between the crimping portion and the hose inserted on the outer peripheral side of the core portion, and being crimped to the core portion side together with the crimping portion;
Fitting with   2. The joint according to claim 1, wherein the filling member is a pipe set to a length equal to or less than a length in an axial direction of a region in which the inner side of the end of the hose is inserted in the caulking portion.   The joint according to claim 1 or 2, wherein a plurality of protrusions that protrude toward the hose side along the axial direction are formed on an inner surface of the caulking portion.   The joint according to any one of claims 1 to 3, wherein a plurality of protrusions protruding toward the hose side along the axial direction are formed on the inner surface of the filling member. The plurality of convex portions are inclined toward the hose insertion port and projecting toward the hose, and retreat from the top of the first inclined portion to the opposite side of the hose. A second inclined portion that is inclined,
The joint according to claim 4, wherein an angle of the first inclined portion with respect to the axial direction of the filling member is larger than an angle of the second inclined portion with respect to the axial direction of the filling member.   The joint according to any one of claims 1 to 3, wherein the filling member is formed of an aluminum alloy.   The joint according to any one of claims 1 to 5, wherein the filling member is made of carbon steel.

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