JP3088531U - Hose joint connection structure - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] In the present invention, when connecting one joint connected to one hose and the other joint, a high sealing property and a strong connection force can be obtained, and the fitting state is achieved. The connection structure of the hose joint which can hold firmly. SOLUTION: When connecting a first joint and a second joint connected to one hose H with a nut 4, one end of the hose H is fitted into an insert sleeve 10,
By sandwiching the front and rear portions of the portion radially swelled by the annular convex portion 12 between the front ring 6 and the back ring 8 in the radial direction or the axial direction, both dam portions dam the fluid flowing from the hose H side or the front side. It can be stopped, and high sealing performance and strong connection force can be obtained.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improvement in a hose joint connection structure used to connect one hose to a connection port of another hose or equipment.

[0002]

[Prior art]

 As is well known, in the field of handling various fluids, a hose joint is always used to connect one hose to the other hose or a connection port of the device.

In this case, it is extremely important to devise the structure of one and the other hoses connected to each other or the structure of the joint itself in order to ensure the reliability of the fluid seal and the ease of connection work. It is extremely important to devise the connection structure of the joint itself for the same reason as above.

Therefore, as a conventional connection structure between the hose and the joint, for example, as shown in Japanese Patent Laid-Open No. 143471/1982, the outer periphery of the end of one hose is supported. One joint connected to one hose connected to the other joint connected to the terminal of the other hose or the fluid connection port of the device, and one joint supported on one joint when one joint is connected to the other joint A hose having an insert sleeve inscribing the inner peripheral surface of the end of the hose and the inner peripheral surface of the other joint while inscribing the inner peripheral surface of the other joint has been proposed.

In such a connection structure between a hose and a joint, in order to securely connect the hose and the joint, the outer diameter of the joint is made as large as possible with respect to the inner diameter of the hose. Is good. In this case, the larger the outer diameter of the joint is, the more firmly the hose and the joint can be connected.

However, if the outer diameter of the joint is too large with respect to the inner diameter of the hose, it becomes difficult to fit the hose to the joint. When it fits into the joint, there was a limit to the strong connection to the joint.

In the connection structure of a hose and a joint proposed in the above-mentioned publication, an intermediate ring having a slope formed so that its outer diameter is gradually increased, and a pressure ring for tightening. The hose (pipe) is firmly connected by pressing the hose (pipe) against the slope of the intermediate ring with the pressure ring.

However, in this case, since the connection is made in a state where the hose (pipe) is not fitted to the thickest part of the intermediate ring, a strong connection force due to the fitting cannot be obtained, and the connection of the nut does not occur. If the tightening force is loose, there is a danger that the hose connection will be easily disconnected.

[0009] As a result, the applicants have conducted intensive studies, and as a result, the connection end of the hose 301 can be easily fitted into the thickest portion 306 by forming the inclined surface of the outer periphery of the insert sleeve 305 gently. The bulged portion 310 of the hose 301 bulged and deformed from the thickest portion 306 by fitting is tightened and clamped by nuts 314 from both sides in the axial direction via the buckling 312 so that the bulged portion 310 has a further diameter. A hose joint that can provide a strong connection force because it swells and deforms in the direction, and can form a dam-shaped 315 on one side of the gentle slope of the insert sleeve 306 can prevent leakage even when strong water pressure acts. It was developed and filed (Japanese Utility Model Publication No. 5-39252).

[0010]

[Problems to be solved by the invention]

 The applicant further studied and formed a thickest annular convex portion near one end where one hose of the insert sleeve was fitted to the outside, formed dam portions on both sides thereof, and formed an outer portion on the insert sleeve. By sandwiching the inner and outer peripheries on both sides bulged by the annular convex portion at the tip of the fitted hose, not only the sealing performance is further improved, but also by clamping both sides of the radially bulged and deformed part in the axial direction. They found that a strong connection was obtained, and developed and applied for a further improved hose joint.

Therefore, the object of the present invention is to provide a high sealing property and a strong connecting force when connecting one joint connected to one hose and the other joint, and firmly fit the fitting state. It is an object of the present invention to provide a connection structure of a hose joint that can hold a hose joint.

[0012]

[Means for solving the problem]

 In order to achieve the above object, the present invention has the following technical means. That is to say, using the reference numerals used in the accompanying drawings corresponding to the embodiments of the invention, in the connection structure between a hose and a joint which can be connected to and detachable from a hose joint, the one joint 1 A front ring 6 interposed between a nut 4 connected to the other joint 2, a female screw 4 </ b> A rear inner peripheral surface of the nut 4 and an outer peripheral surface of one end of the hose H, The back ring 8 interposed between the inner peripheral surface of the rear end of the nut 4 and the outer peripheral surface of the one hose H at a predetermined distance from the ring 6, and the one of the back rings 8 connected to the other joint 2. An insert sleeve fitted into the inner peripheral surface of the end of the hose and holding the inner and outer peripheral surface of the one end of the hose together with the front ring to the back ring; The other joint 1 is provided with a male screw 2A on which the nut 4 is screwed around one end opened to be connected to the one hose H, and a substantially intermediate portion of a communication hole through which a fluid passes. Is formed with a large-diameter stepped fitting hole 2C facing one end side, and an annular concave portion 2D formed at the opening end of the stepped fitting hole 2C. A fitting portion 6A for fitting into the annular concave portion 2D of the joint 2 is formed on the other end side, the inner diameter of the fitting portion 6A is substantially the same as the outer diameter of the one hose H, and the buckling 8 is One end is formed with an outer diameter that is substantially the same as the inner diameter of the flange 4B formed on the inner circumference of one end of the nut 4, and the inner diameter is formed with the same inner diameter as the outer diameter of the one hose H. A flange formed at one end of the nut 4 on the end side The insert sleeve 10 is provided with a flange 8A having a diameter larger than the inner diameter of the dice 4B, and the insert sleeve 10 has an annular protrusion formed so as to be gradually thicker from both sides near one end where the one hose H is externally fitted. In order to block the fluid flowing from the hose H side, a part of the outer periphery formed so as to be gradually thicker on both sides of the annular convex part 12 is annularly cut away to form a pair of steps. And a fitting cylindrical body 16 formed in a continuous manner with the annular convex portion 12 and formed at the other end thereof so as to fit in a liquid-tight manner into the stepped fitting hole 2C of the other joint 2. And an abutting step 15 formed between one end of the fitting cylindrical body 16 and a thinned portion 13C that becomes gradually thinner from the annular convex portion 12. The male screw portion of the other joint 2 is formed. By screwing 2A and the nut 4, the upper A hose joint connection structure characterized in that the inner peripheral surface and the outer peripheral surface of one end of the hose H fitted to the insert sleeve 10 are sandwiched and closely attached together with the front ring 6 to the back ring 8. is there. According to the above, when connecting the one joint and the other joint connected to one hose with the nut, the flange 4A of the nut 4 is engaged with the flange 8A of the buckling 8 and the back together with the nut 4 The ring 8 is inserted into the outer periphery of one of the hoses H and arranged rearward. Next, after the insert sleeve 10 is fitted into one end of the hose H, the fitting cylinder 16 of the insert sleeve 10 is fitted in the large-diameter stepped fitting hole 2C of the other joint 2 in a liquid-tight manner. The fitting portion of the front ring 6 fitted to the outer periphery of one hose H terminal is fitted to the annular concave portion 2C of the other joint 2. Then, the nut 4 arranged behind the one hose H is pulled out to the front end side together with the back ring 8, and the nut 4 is screwed into the male screw 2A of the other joint 2, so that the back ring 8 is connected to the front ring 6 side. The outer circumference of one of the hoses H fitted on both sides of the annular convex portion 12 formed so as to become gradually thicker is radially clamped by the front ring 6 or the back ring 8, and The portion that has swelled and deformed in the radial direction by the annular convex portion 12 is sandwiched in the axial direction by the front ring 6 or the back ring 8. Therefore, when one end of the hose H is fitted into the insert sleeve 10, the portion bulged in the radial direction by the annular convex portion 12 is clamped in the radial or axial direction together with the front ring 6 or the back ring 12. Thus, the dam portions 14A and 14B can block the fluid flowing from the hose H side or the front side, and can obtain a high sealing property and a strong connection force.

Further, according to the present invention, the annular concave portion 2D formed at the opening end of the other joint 2 has a peripheral edge formed in an inverted taper 2E, and the fitting portion 6A of the front ring 6 has a fitting portion 6A. This is a hose joint connection structure formed to have a tapered shape. According to the above, when one joint 1 connected to one hose H and the other joint 2 are connected, the action of tightening the nut 4 causes an annular recess formed at the opening end of the other joint 2. 12, a reverse taper 2E and a tapered taper 6A of the front ring 6 are fitted to each other. Accordingly, a high sealing property can be obtained by the joint portion between the tapered surfaces 2E and 6A, and a strong connecting force can be obtained due to a wedge action between the tapered surfaces, whereby a tightening force is applied to the thick portion of one hose. .

[0014]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a half sectional view showing an embodiment of a hose joint connection structure of the present invention, FIG. 2 is a half sectional view showing an insert sleeve, FIG. 3 is a half sectional view showing the other joint, and FIG. 5 is a half sectional view showing a nut, and FIG. 6 is a half sectional view showing a buckling.

As shown in FIG. 1, the connecting structure of the hose joint of the present invention supports the outer periphery of the terminal H1 of one hose H, and connects the one joint 1 to which the one hose H is attached. The other hose 2 is connected to a terminal of the other hose or another joint 2 connected to a fluid connection port of a device or apparatus.

The hose H is formed by embedding a polyester fiber blade in a uniform mesh shape in an elastic vinyl tube, and has excellent pressure resistance.

In FIG. 1, reference numeral 1 denotes one joint (hereinafter, referred to as a first joint) used as a connection structure of the present invention, and the first joint 1 is connected to the other joint (hereinafter, a second joint 2). ), A front ring 6 disposed on the inner peripheral surface behind the female screw 4A of the nut 4 and interposed between the outer peripheral surface of one end of the hose 5, and a front ring 6. A back ring 8 interposed between the inner peripheral surface of the rear end of the nut 4 and the outer peripheral surface of one of the hoses 5 at a predetermined distance from the first joint; And an insert sleeve 10 which is fitted into the inner peripheral surface on the end side of the hose 5 and clamps the inner and outer peripheral surface on the one end side of the hose 5 together with the front ring 6 to the back ring 8. I have.

More specifically, the second joint 2 is configured as a nipple, and a male screw 2A into which the nut 4 is screwed is screwed around the outer periphery of one end opened to be connected to the one hose 5. On the other end side, a tapered male screw T is formed, and a large-diameter stepped fitting hole 2C facing one end side is formed at a substantially intermediate portion of the communication hole 2B through which the fluid passes. An annular concave portion 2D having substantially the same diameter as the outer diameter of one of the hoses 5 is formed at the open end of the fitting hole 2C, and the peripheral edge thereof is formed with an inverse taper described later.

Next, as shown in FIG. 1 and FIG. 4, the front ring 10 has a fitting portion that fits into a reverse taper 2E (see FIG. 3) around the annular recess 2D of the second joint 2. A tapered taper 6A is formed on the other end side, and the inner diameter 6B is formed to be substantially the same as the outer diameter of the one hose H.

As shown in FIGS. 1 and 6, one end of the buckling 8 has an outer diameter substantially equal to the inner diameter of a flange 4B formed on the inner periphery of one end of the nut 4 (see FIG. 5). A flange 8A whose inner diameter is substantially the same as the outer diameter of the one hose H, and whose other end is larger than the inner diameter of the flange 4B formed at one end of the nut 4 is provided. It is formed at the end.

Further, as shown in FIGS. 1 and 2, the insert sleeve 10 is made of stainless steel, and is thickened from both sides near one end where the one hose H is externally fitted. At the approximate center of the curved slopes 13A and 13B, a gentle mountain-shaped annular convex portion 12 is formed, and the annular convex portion 12 is provided for damping the fluid flowing from the hose H side or the front side. A pair of dam portions 14A, 14B are formed on the outer periphery of the curved slopes 13A, 13B on both sides so as to form a step by partially cutting out a part thereof in a direction perpendicular to the axis.

The inner diameter of the insert sleeve 10 is formed to be substantially the same as the inner diameter of one of the hoses H, so that the fluid resistance is reduced when the one of the hoses H is inserted. Have been.

An O-ring groove 16A is provided in the middle of the second joint 2 at the other end so as to be liquid-tightly fitted in the stepped fitting hole 2C of the second joint 2. The fitting cylinder 16 provided is formed, and an abutting step is provided between one end of the fitting cylinder 16 and a thinned portion 13C which gradually becomes thinner from the curved slope 13B on one side of the annular projection 12. A portion 15 is formed.

Next, a connection procedure of the hose joint connection structure according to the present embodiment configured as described above will be described with reference to FIGS. FIG. 7 is an explanatory view showing an embodiment of the hose joint connection structure of the present invention, showing a state immediately before one joint is connected to the other joint.

First, in a state where the flange 8A of the back ring 8 is engaged with the flange 4B formed on the inner periphery of one end of the nut 4, the buck ring 8 is attached together with the nut 4 to the outer periphery of one hose H. And set it backward.

Next, after inserting the insert sleeve 10 into the end of one of the hoses H, an O-ring 18 is attached to an O-ring groove 16 A formed on the outer periphery of the fitting cylinder 16 of the insert sleeve 10. The fitting cylinder 16 is fitted in the large-diameter stepped fitting hole 2C of the second joint 2 in a liquid-tight manner, and the front ring 6 fitted on the outer periphery of one of the hoses H is the reverse of the periphery of the fitting portion 2D. The taper 2E is fitted to the taper 2E of the second joint 2.

Therefore, the nut 4 disposed behind one of the hoses H is pulled out toward the front end together with the back ring 8 engaged with each other, and the nut 4 is screwed into the male screw 2 A of the second joint 2. The back ring 8 is drawn to the front ring 6 side, and the outer periphery of one of the hoses H fitted to the annular convex portion 12 of the insert sleeve 10 or the two curved slopes 13A and 13B thereof is connected to the front ring 6 or the back ring. 8, the portion swelled and deformed in the radial direction by the annular convex portion 12 is firmly held in the radial direction by the front ring 6 or the back ring 8. By the way, when a hose made of a polyester fiber blade embedded in a uniform mesh shape is used as the hose H, when the hose H is firmly held in the radial direction by the front ring 6 and the back ring 8, the blade is firmly gripped. As a result, not only does the hose H come off, but also the blade does not come off, and in general there is no further water leakage.

By holding the one hose H in this way, the inner peripheral surface of the one hose H comes into close contact with the dam portions 14a and 14B, thereby damping the fluid flowing from the hose H side or the front side. It can be stopped, and high sealing performance and strong connection force can be obtained.

Further, the periphery of the annular concave portion 2D formed at the opening end of the second joint 2 is formed with an inverted taper 2E, and the fitting portion of the front ring 6 is formed with a tapered taper 6A. As a result, a high sealing property can be obtained by the joint between the tapered surfaces 2E and 6A, and the tightening force on the thick portion of one hose H is reduced by the wedge action between the tapered surfaces 2E and 6A. As a result, a strong connection force can be obtained.

[0030]

[Effect of the invention]

 As described in detail above, the present invention has the following effects.

That is, according to the first aspect, when one end of the hose is fitted into the insert sleeve, a portion of the portion bulged in the radial direction by the annular convex portion formed to be gradually thicker from both sides. By sandwiching the front and rear together with the front ring or the back ring in the radial or axial direction, the two dam portions can block the fluid flowing from the hose side or the front side, and provide high sealing performance and strong connection force. Obtainable.

According to the second aspect, a high sealing property can be obtained by joining the tapered surfaces to each other, and a tightening force against the thick portion of one of the hoses is generated due to the wedge action of the tapered surfaces. Connection strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an embodiment of a hose joint connection structure of the present invention.

FIG. 2 is a half sectional view showing an insert sleeve.

FIG. 3 is a half sectional view showing the other joint.

FIG. 4 is a half sectional view showing a front ring.

FIG. 5 is a half sectional view showing a nut.

FIG. 6 is a half sectional view showing a buckling.

FIG. 7 is an explanatory view showing one embodiment of the hose joint connection structure of the present invention, showing a state immediately before one joint is connected to the other joint.

FIG. 8 is a half sectional view showing a connection structure of a conventional hose joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st joint (one joint) 2 2nd joint (the other joint) 2A male screw 2B communication hole 2C stepped fitting hole 2D annular concave part 2E reverse taper 4 nut 4A female screw 5 one hose 6 front ring 6A taper taper (Fitting part) 6B inner diameter 8 buckling 8A flange 10 insert sleeve 12 annular convex part 13A, 13B curved slope 13C thin part 14A, 14B dam part 15 butting step part 16 fitting cylindrical body 16A O-ring groove 18 O-ring H One H1 end T taper male thread

Claims (2)

[Utility model registration claims] In a connection structure between a hose and a joint, which is capable of connecting and disconnecting a hose joint, the one joint 1 includes a nut 4 connected to the other joint 2 and a nut 4 connected to the other joint 2. A front ring 6 disposed on the rear inner peripheral surface of the female screw 4A and interposed between the front ring 6 and the outer peripheral surface of the tip of one of the hoses H; A buckling 8 interposed between the first hose H and the outer peripheral surface of the one hose H is fitted into the inner peripheral surface on the end side of the one hose H in a state of being connected to the other joint 2. An insert sleeve 10 for holding the inner and outer peripheral surfaces on the H end side together with the front ring 6 to the back ring 8, and the other joint 1 is opened to be connected to one hose H. The nut 4 together with the screwed male thread 2A is screwed to Tangaishu, substantially intermediate portion of the communication hole through which fluid passes, stepped fitting hole 2C of the large diameter facing the one end
Is formed, and an annular concave portion 2D is formed at the open end of the stepped fitting hole 2C. The front ring 6 has a fitting portion 6A fitted to the annular concave portion 2D of the other joint 2. The back ring 8 is formed on the other end side, and has an inner diameter substantially equal to the outer diameter of the one hose H. The back ring 8 has a flange 4 B formed on one end inner circumference of the nut 4. Is formed with an outer diameter substantially the same as the inner diameter of the one hose H
The insert sleeve 10 is formed with substantially the same inner diameter as the outer diameter of the insert sleeve 10 and has a flange 8A having a diameter larger than the inner diameter of the flange 4B formed at one end of the nut 4 at the other end. An annular convex portion 12 formed gradually thicker from both sides near one end where the hose H is externally fitted, and an annular convex portion 12 on both sides of the annular convex portion 12 for blocking fluid flowing from the hose H side. A pair of dam portions 14A, 14B, which form a step by cutting out a part of the outer periphery formed so as to become gradually thicker, and the annular convex portion 12 are connected to each other, and the other joint is provided at the other end. A fitting cylindrical body 16 formed so as to be fitted in a liquid-tight manner into the stepped fitting hole 2C, a thin portion 13C that gradually becomes thinner from one end side of the fitting cylindrical body 16 and the annular convex portion 12; From the abutting step 15 formed between The external thread 2A of the other joint 2 and the nut 4
And the inner peripheral surface and the outer peripheral surface of one end of the hose H fitted to the insert sleeve 10 together with the front ring 6 to the back ring 8 so as to be in close contact with each other. Hose joint connection structure. 2. The annular concave portion 2D formed at the opening end of the other joint 2 has a peripheral edge formed as a reverse taper 2E, and a fitting portion of the front ring 6 has a tapered taper 6A. 2. The method of claim 1, wherein
The connection structure of the hose joint described in 1.