JPH08270853A - Connecting coupling and hose with connecting coupling - Google Patents

Abstract

PURPOSE: To make a connecting coupling in a compact size, and to compose it at a low cost, by providing a circular projection and a sliding part at one side end of a tube main body, an insert end to allow the insertion of the hose end and a fixing part at the other side end, and a specific nut part to the intermediate part. CONSTITUTION: At one side end 11 in the axial direction of a tube main body 10, a circular projection 11a and a sliding part 11b are provided, the other side end 12 has the diameter less than the outer diameter of the sliding part 11b, while the intermediate part 13 has the first pair of opposing outer surfaces, and a nut part 13a inscribed to an imarginary specific cylinder with the diameter less than the outer diameter of the sliding part 11b, and larger than the outer diameter of the other side end 12. As a result, a tubular screw member 20 can be inserted from the other side end of the tube main body 10 up to the sliding part 11b, and the screw member 20 is made impossible to remove to the one end side by the circular projection 11a. After that, when the tubular sleeve 30 is inserted from the other end side and fixed to the fixing part 12b, the screw member 20 is made impossible to move to the other end side by the sleeve 30, and it is held impossible to remove between the circular projection 11a and the collar 31 of the sleeve 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting joint connected to one end of a flexible hose and a hose with the connecting joint having the connecting joint. More specifically, the present invention relates to an improvement relating to a connection joint having a rotatable tubular screw member for connecting to a mating member at one end in the axial direction.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a connection joint of this type and a hose with a connection joint using the same have an inner cylinder 60 having a nut portion 63 at the center and an annular shape at one end of the inner cylinder 60. A connection joint including a tubular screw member 70 rotatably held at one end 61 having a protrusion 61a, and a tubular sleeve 80 fixed to a fixed portion 62a of the other end 62 of the inner cylinder 60. 5, the hose insertion end 62b of the other end 62 of the connection joint 5, and the sleeve 80 arranged outside thereof.
There is known a flexible hose 8 made of rubber or the like having a connection joint 5 which is tightly fitted by inserting one end 9a between the hose 8 and the cylindrical part 81.

In the hose 8 having the connection joint 5, a cylindrical screw member 70 rotatably held at one end of the connection joint 5 is rotated so that the hose 8 can be connected to the mating member 90 by engaging it. Has been done.

At this time, a tool such as a spanner is engaged with the nut portion 63 so that the hose 9 does not rotate, and the screw member 70
Only rotate. In the inner cylinder 60 of the conventional connection joint 5 as described above, the diagonal distance of the nut portion 63 is larger than the outer diameters of the both end portions 61 and 62. Therefore, the screw member 70
It was troublesome to detachably hold the inner cylinder 60 at one end 61 of the inner cylinder 60.

That is, the cylindrical screw member 70 initially has a bottom portion 71.
The inner diameter of a is made larger than the outer diameter of the annular protrusion 61a, and is inserted from the one end 60a side of the inner cylinder 60, and once its bottom portion 71a is arranged closer to the nut portion 63 than the annular protrusion 61a. Unless the lower portion 71 of the screw member 70 is caulked in the centripetal direction, the screw member 70 cannot be held on the rotating portion 61b of the one end portion 61 of the inner cylinder 60.

Besides, in the conventional case, the size of the nut portion 63 is specific to one inner cylinder. On the other hand, from the user's point of view, various sizes of the nut part are required depending on the place of use, application, common use with tools used for nut parts of other parts, and the like.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention makes it possible to bring the bottom of a tubular screw member into contact with the annular projection at one end of the tubular body having the annular projection at one end. The main purpose of the present invention is to provide a connection joint that can be easily and rotatably held on one end side and a hose having this connection joint, and the other purpose is to provide a connection joint provided with nuts of various sizes. It is intended to be easily configured.

[0008]

The invention according to claim 1 is
A connection joint capable of connecting a hose end of a flexible hose, comprising a central hole, and having one end, the other end, and an intermediate portion located between the one end and the other end. A cylinder main body extending from one end in the axial direction to the other end; a cylindrical screw member rotatably inserted into the one end of the cylinder main body from the other end side of the cylinder main body; A tubular sleeve fixed to an end portion; and an annular projection portion, which is formed on the one end side and projects outward in the radial direction, at the one end portion of the tubular body, and the other end portion from the annular projection portion. Of the flexible hose having an outer diameter equal to or smaller than the outer diameter of the sliding portion, and a sliding portion having an outer peripheral surface for rotating the tubular screw member extending to the side. A first pair of pairs is provided at the intermediate portion, which has an insertion end portion into which the hose end portion can be inserted, and a fixation portion that is adjacent to the insertion end portion and that fixes the tubular sleeve. While having a nut portion having an outer surface and having a diameter smaller than the outer diameter of the sliding portion and having a diameter equal to or larger than the outer diameter of the other end portion, the tubular screw member has one end side. A threaded portion for connecting to a mating member and a bottom portion having a through hole inserted into the sliding portion on the other end side,
The cylindrical sleeve covers the outer periphery of a flange portion extending in the centripetal direction, which has a central hole that is inserted into and fixed to the fixing portion at one end side thereof, and the insertion end portion that extends from the collar portion to the other end side. And a tubular portion.

According to a second aspect of the present invention, a tubular nut having a fitting hole for fitting the nut portion and a second opposing outer surface on the outer periphery is fitted and attached to the outer periphery of the nut portion. It constitutes the adhesive joint according to claim 1.

[0010]

As described above, the present invention according to claim 1 provides an annular projection formed on one end side at one axial end of the cylinder body, and a slide extending from the root of the annular projection to the other end side. Part and
The other end has an outer diameter equal to or smaller than the sliding part, and an intermediate part between the one end and the other end has a first pair of opposing outer surfaces, and the outer diameter is smaller than the outer diameter of the sliding part. Since it has a nut part that is inscribed in a virtual constant cylinder having a diameter equal to or greater than the outer diameter of the other end, a tubular screw member can be inserted from the other end side of the tubular body toward the one end side up to the sliding part. The protrusion makes the screw member unremovable on one end side. After that, when the tubular sleeve is inserted from the other end side of the tubular body and fixed to the fixed portion of the other end, the tubular screw member cannot move to the other end side due to the sleeve, and the annular member It is held irremovably between the protrusion and the collar of the sleeve.

The connection joint thus constructed has the above-mentioned nut portion in the intermediate portion between one end and the other end of the cylinder body. Therefore, after inserting the end of the flexible hose between the insertion part formed on the other end of the cylinder body and the cylindrical part of the sleeve, the cylindrical part is caulked in the centripetal direction with respect to the insertion end. By doing so, the hose end of the flexible hose can be strongly clamped between the insertion end and the tubular part of the sleeve, and the hose having the above-described connection joint can be configured, and therefore, the connection joint can be provided. When connecting the hose to the mating member, while engaging and fixing a tool such as a spanner on the first pair of opposing outer surfaces of the nut portion, the tubular screw member is rotated without rotating the hose. The flexible hose can then be connected to the mating member.

According to the second aspect of the present invention, before fixing the sleeve to the outer periphery of the nut portion of the above-mentioned cylinder body, the nut is inserted from the other end side in the axial direction so as to be fitted to the nut portion. A nut having a second pair of opposing outer surfaces of the size is non-rotatably fitted. Therefore, it is possible to strongly rotate only the cylindrical screw member while engaging the spanner or the like with the second pair of opposed outer surfaces of the nut.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. (Embodiment 1) Embodiment 1 will be described with reference to FIGS. 2, 3, and 4.

In FIG. 3, reference numeral 10 denotes a cylinder body 10 made of a metal such as an aluminum alloy. The cylinder body 10 has a central hole 10a and extends from one end 10b in the axial direction to the other end 10c.
1 and the other end 12 are formed, the intermediate part 13 is provided between the one end 11 and the other end 12, and is formed by cold forging and rolling. A tubular screw member 20 is rotatably held at one axial end 11 and a tubular sleeve 30 is fixed to the outer circumference of the other end 12.

An end portion 11 of the cylinder body 10 has an annular projection 11a formed on the end 10b side and protruding radially outward.
And a sliding portion 11b extending from the base 11d of the annular protrusion 11a toward the other end 10c.

The sliding portion 11b is the other end 1 of the cylinder body 10.
The cylindrical screw member 20 made of an aluminum alloy is inserted from 0c toward the one end 10b, and the through hole 22a formed in the center-extending bottom portion 22 formed at the other end of the cylindrical screw member is small. Cylindrical screw member 2 that can be fitted with a gap
It has an outer peripheral surface that can rotate 0.

Therefore, the outer diameters of the other end 12 and the intermediate portion 13 of the cylinder body 10 are set to be equal to or smaller than the diameter of the sliding portion 11b, and before the cylindrical sleeve 12 is fitted and fixed, the cylindrical screw member. It is necessary to insert 20.

The tubular screw member 20 has an inner peripheral surface on one end side,
Female screw 2 that can be screwed into the male screw part (not shown) of the mating member
A cylindrical screw portion 21 having 1a is formed. An annular recess 23 is formed between the bottom 22 and the female screw 21a to cover the annular protrusion 11a with a gap.

Therefore, from the other end 10c in the axial direction to the one end 10b.
The cylindrical screw member 20 inserted toward the
2 engages with the annular projection 11a of the cylinder body 10, while the through hole 22a formed in the bottom portion 22 engages with the outer peripheral surface of the sliding portion 11b, so that the cylindrical screw member 20 is rotatable. ing.

Thereafter, a tubular sleeve 30 made of an aluminum alloy is inserted from the other end 10c of the tubular body 10 toward the one end 10b, and is fixedly arranged on the outer periphery of the other end 12 of the tubular body 10. That is, the tubular sleeve 30 has a central hole 3 at one end.
A flange portion 31 having 1a, and an insertion end portion extending from the outer periphery of the flange portion 31 in the axial direction from the other end 10c of the tube body 10 toward the intermediate portion 13 side so that the end portion of the flexible hose can be inserted. 1
2a is provided with a tubular portion 32 that covers the outer circumference of the tubular hollow portion 5 with an annular hollow portion 5, while the tubular body 10 has the other end 12 and the other end 10c
From the insertion end 12a extending toward the intermediate portion 13 from the insertion end 12a and the intermediate portion 1 adjacent to the insertion end 12a.
3 and the fixing portion 12b formed in the annular concave portion, and the cylindrical sleeve 30 is inserted into the other end portion 12 of the cylinder main body 10 from the central hole 31a of the flange portion 31 formed at the other end. After arranging so that 31a is on the outer circumference of the fixing portion 12b, by caulking from the outer circumference of the collar portion 31 in the centripetal direction, the inner peripheral edge portion of the central hole 31a is caulked and fixed to the annular concave portion of the fixing portion 12b. The connection joint 100 is configured.

As shown in FIG. 4, the intermediate portion 13 of the cylinder body 10 has a first pair of opposing outer surfaces 13b, 13b,
A hexagonal nut portion 13a having a diameter smaller than the outer diameter of the sliding portion 11b and equal to or larger than the outer diameter of the other end portion 12 and inscribed in a virtual constant cylinder having a diameter 1 is formed.

Therefore, as shown in FIG. 2, the hollow portion 5 between the insertion end portion 12a of the connection joint 100 and the tubular portion 32 is formed.
And a reinforcing layer 1 such as a wire between the inner and outer rubber layers 1a and 1c.
Insert the hose end 2 of the flexible hose 21 having b,
By crimping the cylindrical portion 32 of the sleeve 30 in the centripetal direction (forming an extreme crimping portion 32a),
The hose end 2 of the hose 1 can be firmly and integrally fixed between the insertion end 12a and the tubular portion 32, and the hose 100 with a connection joint can be configured compactly. When screwing onto the male screw portion (not shown) of the member, by engaging a tool such as a spanner with the nut portion 13a, only the tubular screw member 20 can be rotated without rotating the flexible hose 1. The flexible hose can be easily connected to the mating member by rotating.

The hose end portion 2 of the flexible hose 1 is devised so that the outer rubber layer 1c is peeled off and can be firmly fixed to the connection joint 100.

According to this embodiment, the tubular screw member 20 can be inserted from the other end 10c of the tubular body 10 and can be held so as not to come into contact with the annular protrusion 11a formed on the one end 10b side. As in the conventional case, it is not necessary to reduce the diameter of the other end of the tubular screw member in order to lock it on the annular projection.

Further, since the diameter of the virtual constant cylinder in which the hexagonal nut portion 13a is inscribed is formed to be equal to or smaller than the outer diameter of the sliding portion 11b, the joint fitting 10 can be made compact. In addition, a tubular screw member 2 having a bottom portion 21
0 can be held only by inserting it from the other end 10c of the cylinder body 10, and it is not necessary to crimp the bottom portion as in the conventional case.

Although the nut portion 13a has a hexagonal shape, it is not limited to the hexagonal shape, and it is not limited to a square shape, an octagonal shape, and a pair of first pair for engaging a spanner or the like. It suffices if the opposite outer surfaces 13b and 13b are provided.

(Embodiment 2) Next, claim 2 and claim 3
Embodiments according to the present invention will be described with reference to FIGS. 1, 5, 6, and 7. The same parts as those in the first embodiment will be described with the same reference numerals. As can be seen by comparing FIG. 1 and FIG.
The cylinder main body 10 shown in FIG. 2 is the same as the cylinder main body 10 of the first embodiment, and the cylindrical screw member 20 and the cylindrical sleeve 3 are provided.
0 is also the same as that in the first embodiment. However, in FIG. 1, a nut 40 having a fitting hole 41, which is shown in FIGS. 5 to 6, is provided between the tubular screw member 20 and the tubular sleeve 30 in the intermediate portion 13 of the tubular body 10 so as not to rotate. Is held.

More specifically, as described above, the nut portion 13a is inscribed in a virtual constant cylinder having a diameter smaller than the outer diameter of the sliding portion 11b and larger than the outer diameter of the other end portion 12. Therefore, the nut 40 has a hexagonal through-fitting hole 41 that fits into the hexagonal nut portion 13a, and also has a hexagonal outer periphery having a second pair of opposing outer surfaces 42, 42. The surface is formed.

Therefore, the nut 40 is inserted from the other end 10c of the cylinder body 10 to the position of the sliding portion 11b and then from the other end 10c to the one end 10b.
The hexagonal nut portion 13a formed on the intermediate portion 13 is fitted in a clearance fit state. Of course, it does not matter if they are fitted in a tight fit.

After that, the tubular sleeve 30 is used in the first embodiment.
Similarly to the above, the hollow portion 5 is formed on the outer periphery of the other end 12 of the cylinder body 10.
Is provided, and the flange portion 31 is caulked and fixed to the fixing portion 12b to form the connection joint 200.

In the annular hollow portion 5 formed between the insertion end 12a of the cylinder body 10 and the cylindrical sleeve 32, the reinforcing layer 1b is provided between the inner and outer rubber layers 1a and 1c as shown in FIG.
The hose end 2 of the flexible hose 1 having the above is inserted, and the hose end 2 of the flexible hose 1 is connected by caulking the tubular portion 32 in the centripetal direction with respect to the insertion end 12a.
0 is integrally fixed to 0 to form a hose with a connection joint.

According to such a hose with a fitting, when the flexible hose 1 is connected to the mating member, the second part of the nut 40 is used.
By engaging a tool such as a spanner that engages with the pair of opposing outer surfaces 42, 42, only the screw member 20 is rotated without screwing the hose 1 to be screwed into the screw portion of the mating member. The mating member and the flexible hose 1 can be strongly connected via the connection joint 200.

Therefore, according to this embodiment, the tubular screw member 20 can be inserted from the other end 10c of the tubular body 10 and abutted on the annular projection 11a. Of course, it is not necessary to insert the screw member from the side and crimp the other end of the screw member. Of course, for one type of cylinder main body 10, the second pair of facing surfaces 42, 42 required by the user.
The connection joint 200 having the nuts 40 of various sizes can be easily and inexpensively configured simply by appropriately preparing the nut 40 having the. A protruding portion 43 having a tapered surface 43a is formed on the other end of the nut 40 so that the nut 40 can easily rotate.

Further, in the above-mentioned tubular screw member 20, when the mating member is provided with a male screw, and the female screw 21a is formed on the inner peripheral surface, the mating member has a female screw. When applied, a cylindrical screw member having a male screw on the outer peripheral surface can be formed. Further, a concave tapered surface 11c that engages with the convex tapered surface of the mating member is formed at one end 10b of the cylinder body 10. However, when the mating member has a concave tapered surface, it is formed as the convex tapered surface. be able to.

Further, the insertion end 12a of the barrel body 10 is provided with an annular recess 12c, but these are not restrictive, and the space between the insertion end 12a and the barrel 32 of the sleeve 30 is not limited thereto. It suffices if the end portion 2 of the flexible hose sandwiched between can be strongly engaged.

As described above, the present invention can of course be implemented in other forms and modes without departing from the spirit of the present invention.

[0037]

According to the present invention, in a connection joint in which a tubular screw member is rotatably held at one end of a tubular body and a tubular sleeve is fixed at the other end, a tubular screw is provided. The member can be inserted and held from the other end of the cylinder body, the screw member for holding the screw member does not need a caulking portion, and a tool such as a spanner for rotating only the cylindrical screw member can be engaged. The fitting nut portion can be made small, and the connection joint can be made compact and inexpensive.

Further, by simply fitting the nuts of various sizes having the fitting holes that fit into the nut portions, the connection joint equipped with the nuts of various sizes can be easily and inexpensively constructed.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a cross section of an upper half of a connection joint of a second embodiment of the present invention.

FIG. 2 is a half cross-sectional view showing the upper half of the hose having the connection joint of the first embodiment of the present invention in cross section.

FIG. 3 is a half cross-sectional view showing a cross section of an upper half of the connection joint according to the second embodiment in an assembled state.

4 is a cross-sectional view taken along line X, X of FIG.

5 is a half cross-sectional view showing a cross section of the upper half of the nut in FIG. 1. FIG.

6 is a cross-sectional view taken along the line Y, Y of FIG.

FIG. 7 is a half cross-sectional view showing an upper half of a hose having a connection joint of a second embodiment of the present invention in cross section.

FIG. 8 is a sectional view taken along the axis of a hose having a connection joint for explaining a conventional example.

[Explanation of symbols]

 10: Cylinder body 10a: Center hole 10b: One end 10c: Other end 11: One end 11a: Annular protrusion 11b: Sliding part 12: Other end 12a: Insertion end 12b: Fixed part 13: Intermediate part 13a: Nut Parts 13b and 13b: First pair of opposed outer surfaces 20: Cylindrical screw member 21: Screw part 21a: Female screw 22: Bottom part 22a: Through hole 30: Cylindrical sleeve 31: Collar part 31a: Central hole 32: Cylindrical portion 40: Nut 41: Fitting hole 42, 42: Second pair of opposing outer surfaces

Claims (3)

[Claims] 1. A connection joint capable of connecting a hose end of a flexible hose, which has a center hole and is located between one end and the other end and between the one end and the other end. A cylindrical body extending from one axial end to the other end having an intermediate portion; a cylindrical screw member rotatably inserted into the one end of the cylindrical main body from the other end side of the cylindrical main body; A cylindrical sleeve fixed to the other end of the cylinder main body; and an annular protrusion protruding outward in the radial direction on the one end of the cylinder main body and the annular protrusion. A sliding portion having an outer peripheral surface for rotating the tubular screw member extending from the portion to the other end side, and the other end portion having an outer diameter equal to or less than an outer diameter of the sliding portion. A flexible hose has an insertion end portion into which the hose end portion can be inserted, and a fixing portion which is adjacent to the insertion end portion and which fixes the tubular sleeve. 1 has a pair of opposing outer surface, a smaller diameter than the outer diameter of the sliding portion,
While having a nut portion inscribed in a virtual constant cylinder having a diameter equal to or larger than the outer diameter of the other end portion, the tubular screw member has a screw portion for connecting to a mating member at the one end side, and a tubular screw member at the other end side. A bottom portion having a through hole that is inserted into the sliding portion, the tubular sleeve having a central hole that is inserted into the fixing portion and fixed to the one end side, and a flange portion that extends in the centripetal direction; A connection joint comprising: a tubular portion that covers the outer periphery of the insertion end portion that extends from the flange portion to the other end side. 2. A fitting hole for fitting the nut portion,
A tubular nut having a second opposing outer surface on the outer periphery is fitted and attached to the outer periphery of the nut portion.
Connection joint described in. 3. A hose end portion of at least one end of the flexible hose is fitted and inserted in a gap between the insertion end portion according to claim 1 and the tubular portion of the tubular sleeve,
A hose with a connection joint, wherein the tubular portion is swaged in the centripetal direction, and a hose end portion is sandwiched between the insertion end portion and the tubular portion of the tubular sleeve.