JP4951329B2 - Hose fittings - Google Patents

Description

  The present invention relates to a hose coupling.

  As shown in FIG. 6, the hose joint A for connecting the high-pressure hoses is generally formed with a hose insertion part a1 into which the hose C is inserted at one end and connected to another hose joint B at the other end. A tubular core metal fitting a in which a nut c is arranged, and a fastener b for fastening the hose C to the hose insertion part a1.

  In the hose joint A, the hose C is fixed to the hose insertion part a1 by crimping the fastener b toward the center of the core metal a with the hose C inserted into the hose insertion part a1.

  However, if the nut c is rotated to connect the hose joint A to the hose joint B and screwed into the screw part e at the end of the hose joint B, not only the nut c but the entire hose joint A rotates. The hose C is twisted.

  As a hose joint that solves the problem that the hose C is twisted when the hose joint A and the hose joint B are connected, a wrench is hung on the portion between the fastener b and the nut c in the core metal a of the hose joint A. A hose joint having a form shown in FIG. 7 in which a wrench holding part a2 having a hexagonal cross section is bulged outward in the radial direction has been proposed (Patent Documents 1 to 3).

In the hose joint of the above-described form, when the nut c is rotated and screwed into the screw part e at the end of the hose joint B, the wrench holding part a2 is held with a wrench so that the core metal a does not rotate around the axis. By doing, the problem that the hose C twists can be suppressed.
JP 2006-112600 A JP 2003-278975 A JP-A-2005-273824

  However, if the core metal is inserted into the wrench grip and welded, or the core wrench is screwed into the wrench grip and the wrench grip is fixed to the core, the cost increases. .

  In addition, there is a problem that it takes too much man-hour to cut the hexagonal material having a hexagonal cross section to form the core metal fitting and the wrench gripping portion.

  The present invention has been made to solve the above-mentioned problem, and it has a bulging portion for gripping with a wrench when connecting to another hose joint, but it can be manufactured inexpensively with a small number of man-hours. The purpose is to provide joints.

In the hose joint according to the first aspect of the present invention, a hose insertion portion into which the hose is inserted is formed at one end portion, and a screw portion for connecting to another hose joint is formed at the other end portion. Or a tubular core fitting provided with a nut, and a hose insertion portion that is provided so as to surround the hose insertion portion and crimps toward the center of the core fitting with the hose inserted in the hose insertion portion The fastener for fastening the hose is attached by fitting to a position adjacent to the other end of the hose insertion portion in the core metal fitting, and a wrench is hung on the outer peripheral surface when connecting to another hose joint. The core metal fitting is formed with a hose insertion portion to be inserted into the hose, and an intermediate portion that is generally cylindrical to engage with the wrench gripping fitting. Is A pair of parallel surfaces having a two-surface width L is formed, and the wrench holding bracket is adjacent to the insertion hole into which the hose insertion portion of the core bracket is inserted and the upstream side in the insertion direction of the insertion hole. A fitting portion, which is a space in which the middle portion of the metal fitting is fitted, is formed, and the wall surface of the fitting portion has a two-surface width L ′ equal to a two-surface width L of a pair of parallel surfaces in the middle portion of the core metal fitting. A pair of parallel surfaces are formed .

  In the hose coupling according to the first aspect, the wrench holding fitting is fixed so as not to rotate with respect to the core fitting by crimping the fastener as described above.

  Therefore, when connecting the hose joint to another hose joint, the hose can be twisted because the core metal fitting is prevented from rotating around the axis by holding the wrench metal fitting with a wrench. Absent.

  In addition, the hose joint is manufactured by separately preparing a core metal fitting and a wrench holding metal fitting and fitting them together, so that the wrench holding metal fitting is attached to the core metal fitting. And can be manufactured at a low cost with fewer man-hours compared with the case where the wrench holding metal fitting and the core metal fitting are formed by cutting the hexagonal material.

A hose joint according to a second aspect of the present invention is the hose joint according to the first aspect, wherein the end portion on the most upstream side with respect to the insertion direction a of the core metal of the fastening portion is along the radial direction. A flange portion that bulges inward is formed, and the wrench gripping bracket includes a wrench gripping portion on which a wrench is hung, a reduced diameter portion adjacent to the downstream side of the wrench gripping portion along the insertion direction a of the core bracket, The inner peripheral surface of the flange portion of the fastener is brought into close contact with the outer peripheral surface of the reduced diameter portion of the wrench gripping fitting when the upstream end portion in the insertion direction of the fastening portion is crimped. The hose joint according to the invention has two surfaces, the outer peripheral surface of the portion of the core metal fitting to which the wrench holding metal fitting is mounted and the inner peripheral surface of the wrench holding metal fitting according to claim 1 or 2. Parallel planes with the same width are formed And wherein the door.

  In the hose joint, as described above, since the parallel surface having the same two-surface width is formed on the outer peripheral surface of the core metal fitting and the inner peripheral surface of the wrench holding metal fitting, the core metal fitting is attached to the lumen of the wrench holding metal fitting. When inserted, the parallel surface formed on the outer peripheral surface of the core metal and the parallel surface formed on the inner peripheral surface of the wrench gripping metal are engaged with each other. As a result, the wrench gripping fitting is mounted so as not to rotate with respect to the core fitting.

  As described above, according to the present invention, there is provided a hose joint that can be manufactured inexpensively with a small number of man-hours, despite having a bulging portion for gripping with a wrench when connecting to another hose joint.

1. Embodiment 1

  Hereinafter, an example of the hose coupling according to the present invention will be described.

  In the hose joint 100 according to the embodiment, as shown in FIG. 1, a hose insertion portion 20 into which the high-pressure hose 10 is inserted is formed at one end portion, and a nut 8 for connecting to another hose joint is fitted. The core metal fitting 2, the fastener 4 inserted into the hose insertion part 20 in the core metal fitting 2, and the wrench grip metal fitting 6 attached by fitting to the position adjacent to the other end of the hose insertion part in the core metal fitting 2 With.

  As shown in FIG. 2, the core metal fitting 2 is tubular as a whole, and a lumen 21 having a circular cross section is formed inside. At the other end of the lumen 21, an enlarged portion 21A that is enlarged in a conical shape is formed.

  On the outer peripheral surface of the hose insertion portion 20 in the core metal fitting 2, a hose disconnection preventing projection 20 </ b> B is formed in a form in which a conical surface expanding along the direction in which the high-pressure hose 10 is inserted is continuous.

  An intermediate portion 24 is also formed in the core metal 2 adjacent to the hose insertion portion 20. A step 20A is formed between the intermediate portion 24 and the hose insertion portion 20. On the other end side of the intermediate portion 24, a nut receiving flange 22 that engages with the nut 8 and prevents the nut 8 from falling off bulges outward in the radial direction. A step 22 </ b> A is formed between the nut receiving flange 22 and the intermediate portion 24.

  2A is a partial cross-sectional view of the intermediate portion 24 cut along the axis of the core metal 2, and FIG. 2B is a cross-sectional view cut along the plane XX perpendicular to the axis. Show. As shown in FIGS. 2A and 2B, the intermediate portion 24 is formed with a pair of parallel surfaces 26 that are separated from each other by a two-surface width L.

  The wrench grip 6 is formed in a hexagonal nut shape as a whole as shown in FIG. 3A in a side view and a partial cross-sectional view, and in FIG. 3B in a front view. An insertion hole 60 through which is inserted is formed.

  A wrench holding part 6A is formed on the upstream side of the insertion direction of the core fitting 2 indicated by arrow a in FIG. A short cylindrical reduced diameter portion 6B having a diameter smaller than the two-surface width of the wrench grip portion 6A is formed adjacent to the downstream side of the wrench grip portion 6A. At the end of the reduced diameter portion 6B, an enlarged portion 6C having a disk shape or a short cylindrical shape is formed. Steps 6D and 6E are formed between the wrench grip portion 6A and the reduced diameter portion 6B, and between the reduced diameter portion 6B and the enlarged portion 6C, respectively.

  On the upstream side with respect to the insertion direction a of the insertion hole 60, a fitting portion 62 that is an enlarged portion to be fitted to the intermediate portion 24 of the core metal fitting 2 is formed. The fitting portion 62 is formed with a parallel surface 64 separated by a distance L ′ substantially equal to the two-surface width L of the parallel surface 26 formed in the intermediate portion 24 of the core metal fitting 2. The insertion hole 60 has an inner diameter equal to the interval L ′. A step 60 </ b> A is formed between the insertion hole 60 and the fitting portion 62.

  As shown in FIG. 4, the fastener 4 is formed in a cylindrical shape as a whole, and four protrusions 42 extending in the circumferential direction are provided on the inner peripheral surface 40. Each of the protrusions 42 has a triangular cross section that decreases toward the tip. A flange portion 44 that bulges inward along the radial direction is formed at an end portion on the most upstream side with respect to the insertion direction a of the core metal fitting 2 of the fastener 4, and the flange portion 44 and the inner peripheral surface 40 A step 40A is formed between them.

  As shown in FIG. 4, the nut 8 has an insertion hole 80 through which the core metal fitting 2 is inserted at the center. A female screw portion 82 that is screwed into a male screw portion formed at the end of another hose joint is formed on the upstream side with respect to the insertion direction a of the core metal fitting 2 in the insertion hole 80, and at the downstream end portion. A flange portion 84 bulging inward along the radial direction is formed. A step 80 </ b> A is formed between the flange portion 84 and the insertion hole 80.

  Hereinafter, the operation of the hose joint 100 will be described.

  As shown in FIG. 5A, the metal core 2 is inserted into the nut 8 along the insertion direction a so that the hose insertion portion 20 faces the downstream side in the insertion direction a. By engaging the step 80 </ b> A of the nut 8 and the step 22 </ b> A of the core metal 2, the nut 8 is held at the upstream end with respect to the insertion direction a of the core metal 2 by the nut receiving flange 22.

  When the metal core 2 is inserted into the nut 8, the metal core 2 is inserted into the insertion hole 60 of the wrench gripping metal 6 along the insertion direction a so that the hose insertion portion 20 faces the downstream side in the insertion direction a. When the core metal fitting 2 is inserted into the wrench holding metal fitting 6, the parallel surface 26 of the core metal fitting 2 and the parallel surface 64 of the wrench holding metal fitting 6 are engaged with each other. Thereby, the wrench gripping metal 6 is held without rotating with respect to the core metal 2. Further, when the step 20A of the core metal 2 and the step 60A of the wrench gripping metal 6 are engaged with each other, the relative position along the insertion direction a between the core metal 2 and the wrench gripping metal 6 is determined.

  Finally, the fastener 4 is inserted into the hose insertion part 20 of the core metal fitting 2 toward the upstream side with respect to the insertion direction a.

  When the core metal fitting 2 is inserted into the nut 8 and the wrench gripping metal fitting 6 and the fastener 4 is inserted into the hose insertion portion 20 of the core metal fitting 2, the insertion direction a in the fastener 4 as shown in FIG. Then, the upstream end portion is crimped with an appropriate crimping tool, in other words, pressed toward the center of the core metal fitting 2. As a result, the inner peripheral surface of the flange portion 44 of the fastener 4 is in close contact with the reduced diameter portion 6B of the wrench gripping bracket 6, and at the same time, the reduced diameter portion 6B is reduced in diameter so that the inner peripheral surface of the insertion hole 60 is the core metal fitting 2. The wrench gripping metal fitting 6 is fixed to the core metal fitting 2 in close contact with the outer peripheral surface.

  When the wrench grip 6 is fixed to the core 2, the hose insertion part 20 of the core 2 is inserted into the high-pressure hose 10 as shown in FIG. 5C, and the fastener 4 is crimped over the entire length. As a result, the four protrusions 42 of the fastener 4 bite into the outer peripheral surface of the high-pressure hose 10, and the hose removal prevention projections 20 </ b> B provided on the hose insertion part 20 bite into the inner surface of the high-pressure hose 10, Fastened to the metal fitting 2.

  When connecting the hose joint 100 to which the high pressure hose 10 is fastened to another hose joint, the nut 8 is rotated by gripping the wrench grip 6 with a wrench so that the core metal and the high pressure hose 10 do not rotate. The hose joint 100 and the other hose joint can be connected without the high-pressure hose 10 being twisted.

  As mentioned above, although the example of the hose coupling by which the nut was arrange | positioned at the other end part of the core metal was demonstrated, the hose joint which formed the male screw part in the other end part of the core metal is also included by embodiment of this invention. .

FIG. 1 is a partial cross-sectional view showing a cross section of the hose joint according to the first embodiment cut along the axial direction. FIG. 2 is a partial cross-sectional view showing a cross section cut along the axial direction of the core fitting included in the hose joint shown in FIG. 1 and a cross-sectional view showing a cross section cut in a direction perpendicular to the axial line. 3 is a partial cross-sectional view cut along the axial direction showing the configuration of the wrench gripping fitting included in the hose joint shown in FIG. 1 and a cross-sectional view cut along the direction perpendicular to the axial line. FIG. 4 is a partial cross-sectional view showing a cross section cut along an axial direction showing assembly of a nut, a core metal fitting, a wrench gripping metal fitting, and a fastener included in the hose joint shown in FIG. 1. FIG. 5 is an explanatory view showing a procedure for assembling the hose joint shown in FIG. 1 and inserting the wrench gripping metal fitting into the core metal fitting and fastening the high-pressure hose. FIG. 6 is a partial cross-sectional view showing an example of a conventional hose joint. FIG. 7 is a partial cross-sectional view showing another example of a conventional hose coupling.

Explanation of symbols

2 core metal fittings 4 fastener 6 wrench grip metal fittings 6A wrench gripping part 6B reduced diameter part 6C enlarged part 6D step 8 nut 10 high pressure hose 20 hose insertion part 20A step 20B prevention protrusion 21 lumen 21A enlarged part 22 nut support flange 22A step 24 Intermediate part 26 Parallel surface 40 Inner peripheral surface 40A Step 42 Projection 44 Flange part 60 Insertion hole 60A Step 62 Fitting part 64 Parallel surface 80 Insertion hole 80A Step 82 Female screw part 84 Flange part 100 Hose joint

Claims (3)

A hose insertion portion into which a hose is inserted is formed at one end portion, and a screw portion for connecting to another hose joint is formed at the other end portion, or a tubular member in which a nut is disposed. Core metal fittings,
Fasteners that are provided so as to surround the hose insertion part, and fasten the hose by crimping toward the center of the core metal fitting with the hose inserted in the hose insertion part,
A wrench grip fitting that is attached by fitting at a position adjacent to the other end portion of the hose insertion portion in the core metal fitting, and a wrench is hung on the outer peripheral surface when connected to another hose joint,
The core metal part is formed with a hose insertion part to be inserted into the hose and an intermediate part which is cylindrical as a whole and engages with the wrench gripping metal part. Parallel planes are formed,
The wrench gripping fitting is a space that is adjacent to the insertion hole into which the hose insertion part of the core fitting is inserted and the upstream side in the insertion direction of the insertion hole and into which the middle part of the core fitting is fitted. The hose joint is formed with a pair of parallel surfaces having a two-surface width L ′ equal to the two-surface width L of the pair of parallel surfaces in the intermediate portion of the core metal. . A flange portion that bulges inward along the radial direction is formed at the most upstream end with respect to the insertion direction a of the core metal of the fastening portion,
  The wrench gripping bracket is formed with a wrench gripping portion on which a wrench is hung, and a reduced diameter portion adjacent to the downstream side of the wrench gripping portion along the insertion direction a of the core bracket,
  The hose joint according to claim 1, wherein when the end portion on the upstream side in the insertion direction of the fastening portion is crimped, the inner peripheral surface of the flange portion of the fastener comes into close contact with the outer peripheral surface of the reduced diameter portion of the wrench gripping fitting. The hose coupling according to claim 1 or 2 , wherein a hose disconnection preventing protrusion having a shape in which a conical surface expanding along a direction in which the hose is inserted is formed on an outer peripheral surface of the hose insertion portion in the core metal.

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