JP2004036846A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint with improved connecting strength against slip-off during use compared to conventional constitution. <P>SOLUTION: This pipe joint has a joint body part 1 for connecting piping, and a mounting part 2 fixed to an apparatus or the like.A mutual locking joint face 4 is formed at the outer periphery of the inner one and the inner periphery of the outer one between the joint body part 1 and the mounting part 2.The inner one is formed with a slit 6 from the open end side, and an insert 8 is inserted therein to suppress the deformation of the inner one.An engaging protrusion 14 is formed at the outer periphery of the inner one between the joint body part 1 and the mounting part 2, and a corresponding engaging groove 15 is formed at the inner periphery of the outer one.The engaging protrusion 14 and the engaging groove 15 form the locking joint face 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipe joint for connecting pipes.
[0002]
[Prior art]
Conventionally, pipe joints have been used for piping of fluids such as beer beverages and other liquids and gases.
[0003]
As shown in FIG. 20, this pipe joint comprises a joint body 32 for connecting a pipe 31 (tubes and hoses) and a mounting part 33 for fixing to a device or the like (for example, a ball server). The joint main body 32 and the mounting part 33 are fitted and connected to each other. An annular projection 34 is formed on the outer periphery of the joint body 32, and an annular engagement groove 35 is formed on the inner periphery of the mounting portion.
[0004]
However, when the annular projection 34 is fitted (forcibly fitted) into the annular engagement groove 35 at the time of assembling the pipe joint, the annular engagement groove 35 located on the outer side is temporarily deformed to increase in diameter. Since the height of the projection 34 and the depth of the engagement groove 35 (the coupling allowance between the joint main body 32 and the mounting portion 33) cannot be made so large, it is difficult to improve the coupling strength against disengagement during use. There was a problem.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pipe joint capable of improving the connection strength against disconnection during use as compared with the related art.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following technical means.
{Circle around (1)} The pipe joint of the present invention has a joint main body for connecting pipes and a mounting portion for fixing to a device or the like, and any one of the inner periphery and the outer one of the joint main body and the mounting portion. The inner peripheral surface of each is formed with a retaining joint surface between them, and a slit is formed on the inner side from the open end side, and an insert is inserted therein to suppress deformation of the inner side. In the pipe joint, a slit is formed on the inner side of the joint body and the mounting portion from the open end side, and an insert is inserted therein to suppress deformation on the inner side. When joining the retaining joint surfaces to each other during the assembly of the joint, the inside of the joint body and the mounting part where the slit is formed from the open end side is easily deformed inward, Even if the size of the surface is slightly larger, Bonds between each other are possible.
[0007]
In addition, as described above, the slit was formed, but the insert was inserted therein to suppress the deformation of the inner side of the joint body and the mounting portion, so that the inner inward deformation during use is suppressed. Thus, the joining state of the retaining joint surface can be suitably maintained. In addition, the slit may be provided at one location or at multiple locations.
{Circle around (2)} An engagement protrusion is formed on the inner periphery of any one of the joint body portion and the attachment portion, and a corresponding engagement groove is formed on the outer inner periphery. The retaining groove may be configured to form a retaining joint surface.
[0008]
With this configuration, when the engagement protrusion is fitted into the engagement groove at the time of assembling the pipe joint, the inner side of the joint body portion and the mounting portion where the slit is formed from the open end side is inward. The joint is easily deformed, and the coupling between the joint body and the mounting portion can be performed even if the height of the engaging protrusion and the depth of the engaging groove are slightly increased.
[0009]
In addition, as described above, the slit was formed, but the insert was inserted therein to suppress the deformation of the inner side of the joint body and the mounting portion, so that the inner inward deformation during use is suppressed. Thus, the engagement between the engagement protrusion and the engagement groove can be suitably maintained.
{Circle around (3)} A pair of a drop-off prevention projection and a drop-out prevention groove that engage with each other may be formed on the inner side where the slit is formed from the open end side and the insert.
[0010]
With this configuration, the drop-out prevention protrusion and the drop-out prevention groove that engage with each other are fitted into each other, so that the insert can be suitably prevented from coming off. The drop-off prevention protrusion and the drop-out prevention groove may be formed in an annular shape.
{Circle around (4)} The insert may have a convex portion that fits into the slit from the open end side and fills the gap.
[0011]
With this configuration, it is possible to prevent the accumulation of fluid in the slit when supplying the fluid during use.
{Circle around (5)} An annular member may be attached to the outer periphery of one of the outer side of the joint body and the attachment portion.
[0012]
With this configuration, it is possible to prevent the outer diameter deformation of any one of the joint body and the mounting portion, thereby preventing an accidental rupture of the connection between the joint body and the mounting portion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIGS. 1 to 3, the pipe joint of this embodiment includes a joint main body 1 for connecting pipes (tubes and hoses, not shown) and equipment (eg, a beer server, not shown). And a mounting portion 2 for fixing the mounting portion 2 to 3 is a seal ring.
[0014]
Of the joint body 1 and the mounting portion 2, a retaining joint surface 4 is formed between the outer periphery of the joint body 1 on the inner side and the inner periphery of the mounting portion 2 on the outer side. I have. Slits 6 are formed in the joint body 1 at four places from the open end 5 side, and a cylindrical insert 8 having a flange 7 on the inner peripheral surface of the joint body 1 is inserted. The inward deformation of the joint body 1 is suppressed. An O-ring 9 is fitted around the outer periphery near the rear end of the insert 8.
[0015]
The material of the joint body 1, the mounting part 2, and the cylindrical insert 8 may be made of synthetic resin or metal. The material of the cylindrical insert 8 is preferably harder than the joint body 1 in which the slit 6 is formed.
[0016]
Next, a use state of the pipe joint of this embodiment will be described.
[0017]
In this pipe joint, a slit 6 is formed in the joint body 1 from the open end 5 side, and an insert 8 is inserted into the inner peripheral surface of the joint body 1 after the joint body 1 and the mounting part 2 are connected. As a result, the joint body 1 having the slit 6 formed from the open end 5 is inwardly joined when the joint surfaces 4 are joined to each other at the time of assembling the pipe joint. The joint body 1 and the mounting portion 2 can be connected to each other even if the size (engagement margin) of the retaining joint surface 4 is slightly increased.
[0018]
That is, even if the size of the retaining joint surface 4 is slightly increased, the coupling between the joint main body 1 and the mounting portion 2 can be performed by the slit 6 at the time of assembly, and the joining state of the retaining joint surface 4 is changed to the insert 8 at the time of use. Therefore, there is an advantage that the bonding strength against disconnection during use can be improved as compared with the related art.
[0019]
Although the slit 6 is formed as described above, the insert 8 is inserted into the joint body 1 after the coupling of the joint body 1 and the mounting part 2 to suppress deformation of the joint body 1, so that the joint body 1 is not used when used. Is prevented from deforming inward, and the joining state of the retaining joint surface 4 can be suitably maintained.
[0020]
Further, the joint body 1 is formed with a slit 6 from the open end 5 side so as to be easily deformed at the time of assembling, so that when the joint body 1 and the mounting part 2 are connected, the work is performed without being too hard to insert. There is also an advantage that it is easy. Since the insert 8 is inserted into the inner peripheral surface of the joint main body 1 to suppress the deformation of the joint main body 1, the inward deformation of the joint main body 1 is prevented during use, and the retaining joint surface is prevented. 4 can be suitably maintained.
(Embodiment 2)
Next, the second embodiment will be described focusing on differences from the first embodiment.
[0021]
As shown in FIGS. 4 and 5, the joint body 1 having the slits 6 formed at four places from the open end 5 side and the cylindrical insert 8 having the flange 7 are provided with an annular engagement with each other. A pair of a drop prevention protrusion 10 and a drop prevention groove 11 is formed. The annular drop-off prevention protrusion 10 is formed slightly inside the flange 7 of the cylindrical insert 8. The drop prevention groove 11 is formed on the inner peripheral surface near the tip of the slit 6.
[0022]
Further, since the falling-off preventing projections 10 and the falling-off preventing grooves 11 that engage with each other are fitted into each other, there is an advantage that the insert 8 can be suitably prevented from coming off.
(Embodiment 3)
Next, a third embodiment will be described focusing on differences from the above embodiment.
[0023]
As shown in FIGS. 6 and 7, in this embodiment, unlike the second embodiment, the inner peripheral groove of the mounting portion has a structure in which it is simply a protrusion, and the structure is simple and has an advantage of good workability. There is.
(Embodiment 4)
Next, a fourth embodiment will be described focusing on differences from the above embodiment.
[0024]
As shown in FIGS. 8 to 10, the cylindrical insert 8 has a projecting portion 12 that fits into the slit 6 from the open end 5 side and fills the gap and protrudes from the outer peripheral surface. Therefore, since the convex portion 12 fills the gap between the slits 6, it is possible to prevent a fluid pool from being generated in the portion of the slit 6 when supplying a fluid during use. When the gap is eliminated as described above, it is possible to prevent the accumulation of fluid and the propagation of various germs, which is hygienic when handling food such as beer drinks.
(Embodiment 5)
As shown in FIGS. 11 to 13, the pipe joint of this embodiment has a joint main body 1 for connecting a pipe 13 (tubes and hoses) and an attachment for fixing to a device or the like (for example, a beer server, not shown). Part 2 (provided with a male screw part). 9 is an O-ring.
[0025]
An annular engagement projection 14 is formed on the outer periphery of the joint body portion 1 on the inner side of the joint body portion 1 and the mounting portion 2, and corresponds to the inner periphery of the mounting portion 2 on the outer side. An annular engagement groove 15 is formed. The engagement projection 14 and the engagement groove 15 constitute the retaining joint surface 4.
[0026]
The joint body 1 was formed with four slits 6 from the open end 5 side, and a cylindrical insert 8 was inserted into the inner peripheral surface of the joint body 1 to form the slit 6. The deformation of the joint body 1 is suppressed.
[0027]
The joint body 1 having the slit 6 formed therein and the tubular insert 8 are formed with a pair of annular drop-off prevention protrusions 10 and drop-off prevention grooves 11 that engage with each other. The annular drop-off prevention protrusion 10 is formed slightly inside the flange 7 of the cylindrical insert 8. The drop prevention groove 11 is formed on the inner peripheral surface near the tip of the slit 6.
[0028]
Next, a use state of the pipe joint of this embodiment will be described.
[0029]
In this pipe joint, a slit 6 is formed from the open end 5 side in the joint main body 1 on which the engagement projection 14 is formed, and after the joint main body 1 and the mounting part 2 are connected, the joint main body 1 Since the deformation of the joint body 1 is suppressed by inserting the cylindrical insert 8 into the inner peripheral surface, when fitting the engagement protrusion 14 to the engagement groove 15 at the time of assembling the pipe joint, the slit is required. The joint body 1 on which the joint 6 is formed is easily deformed inward. Even if the height of the engagement protrusion 14 or the depth of the engagement groove 15 is slightly increased, the joint body 1 is attached to the joint body 1. Coupling between the parts 2 is possible.
[0030]
Although the slit 6 is formed as described above, the insert 8 is inserted into the joint body 1 after the coupling of the joint body 1 and the mounting part 2 to suppress deformation of the joint body 1, so that the joint body 1 is not used when used. Is prevented from deforming inward, and the coupling state between the engagement protrusion 14 and the engagement groove 15 can be suitably maintained.
[0031]
That is, even if the height of the engagement protrusion 14 or the depth of the engagement groove 15 is slightly increased, the coupling between the joint body 1 and the mounting portion 2 is possible by the slit 6 during assembly, and the engagement protrusion 14 is used during use. Since the state of connection between the groove and the engagement groove 15 can be suitably maintained by the insert 8, there is an advantage that the strength of connection with respect to disengagement during use can be improved as compared with the related art.
[0032]
In addition, since the drop-off preventing protrusions 10 and the drop-off preventing grooves 11 that engage with each other are fitted to each other, there is an advantage that the insert 8 can be suitably prevented from coming off.
(Embodiment 6)
Next, a sixth embodiment will be described focusing on differences from the above-described embodiment.
[0033]
As shown in FIGS. 14 to 16, this embodiment is different from the fifth embodiment in that an O-ring is provided at each of the main body fitting portion and the mounting portion fitting portion of the insert. Fluid can be prevented from entering. Thereby, there is an advantage that the same effect as in the fourth embodiment is obtained.
(Embodiment 7)
Next, a seventh embodiment will be described focusing on differences from the above-described embodiment.
[0034]
As shown in FIGS. 17 to 19, a rigid annular member 16 (metal ring) having a substantially L-shaped cross section is attached to the outer periphery of the outer attaching portion 2.
[0035]
Therefore, there is an advantage that the stiffness of the metal ring can prevent the attachment portion 2 from expanding and deforming in diameter, thereby avoiding an accidental rupture of the connection between the joint body 1 and the attachment portion 2.
[0036]
【The invention's effect】
The present invention is configured as described above and has the following effects.
[0037]
Even if the size of the retaining joint surface is slightly increased, the joint body and the mounting portion can be connected to each other by the slit at the time of assembling, and the joining state of the retaining joint surface can be suitably maintained by the insert during use. Thus, it is possible to provide a pipe joint capable of improving the connection strength against disconnection during use.
[Brief description of the drawings]
FIG. 1 is a half sectional view illustrating a first embodiment of a pipe joint according to the present invention.
FIG. 2 is a half sectional view for explaining a separated state of the pipe joint of the pipe joint of FIG. 1;
FIG. 3 is a view of the pipe joint of FIG.
FIG. 4 is a half sectional view for explaining a pipe joint according to a second embodiment of the present invention;
FIG. 5 is a half sectional view illustrating a separated state of the pipe joint of the pipe joint of FIG. 4;
FIG. 6 is a half sectional view illustrating Embodiment 3 of the pipe joint of the present invention.
FIG. 7 is a half sectional view illustrating a separated state of the pipe joint of the pipe joint of FIG. 6;
FIG. 8 is a half sectional view illustrating Embodiment 4 of the pipe joint of the present invention.
FIG. 9 is a half sectional view for explaining a separated state of the pipe joint of the pipe joint of FIG. 8;
FIG. 10 is a view of the pipe joint of FIG. 8 taken along line BB.
FIG. 11 is a half sectional view illustrating Embodiment 5 of the pipe joint of the present invention.
FIG. 12 is a half sectional view illustrating a separated state of the pipe joint of the pipe joint of FIG. 11;
FIG. 13 is a view of the pipe joint of FIG. 11 taken along line CC.
FIG. 14 is a half sectional view illustrating Embodiment 6 of the pipe joint of the present invention.
FIG. 15 is a half cross-sectional view illustrating a separated state of the pipe joint of the pipe joint of FIG. 14;
FIG. 16 is a view of the pipe joint in FIG. 14 taken along the line DD.
FIG. 17 is a half sectional view illustrating Embodiment 7 of the pipe joint of the present invention.
FIG. 18 is a half sectional view for explaining a separated state of the pipe joint of the pipe joint of FIG. 17;
FIG. 19 is a view of the pipe joint of FIG. 17 taken along the line DD.
FIG. 20 is a half sectional view illustrating a conventional pipe joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Joint main body part 2 Attachment part 4 Prevention joining surface 5 Open end 6 Slit 8 Insert 10 Drop prevention protrusion 11 Drop prevention groove 12 Convex part, engagement protrusion, engagement groove, annular member

Claims (5)

It has a joint body for connecting pipes and a mounting portion for fixing to a device or the like, and the inside of the outer periphery and the inner periphery of the outer one of the joint body and the mounting portion are non-removable joints. A pipe joint, wherein a surface is formed, and a slit is formed on the inner side from the open end side, and an insert is inserted therein to suppress deformation on the inner side. An engagement protrusion is formed on an inner periphery of any one of the joint body portion and the mounting portion, and a corresponding engagement groove is formed on an outer inner periphery, and the engagement protrusion and the engagement groove are formed. The pipe joint according to claim 1, wherein the retaining joint surface is configured by: 3. The pipe joint according to claim 1, wherein a pair of a drop-off prevention protrusion and a drop-out prevention groove that engage with each other is formed on an inner side where the slit is formed from the open end side and the insert. 4. 4. The pipe joint according to claim 1, wherein the insert has a convex portion that fits into a slit from the open end side and fills the gap. 5. The pipe joint according to any one of claims 1 to 4, wherein an annular member is attached to an outer periphery of one of the outer side of the joint body and the attachment portion.

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