JP2942456B2 - One-touch fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-touch joint. More specifically, the present invention relates to a one-touch joint for connecting various hoses and pipes while maintaining the sealing property, and which is detachable by a simple operation.

[0002]

2. Description of the Related Art When connecting hoses and pipes for a fluid of a certain high pressure to a cooler, an indoor cooler or a refrigerator for an automobile, a method of connecting a union screw and a union flange with a union nut has conventionally been used. Used. However, it is often very difficult to turn the union nut with a spanner or wrench when connecting and disconnecting in the engine room of a car or the housing of a cooler, and the connection is incomplete. There is a fear.

On the other hand, a one-touch joint 51 for high pressure as shown in FIG. 7 is also known. This one-touch joint 51
Is composed of a plug 52 and a socket 53,
A plurality of steel balls 54 which can partially enter and exit from the inner diameter side of the socket 53, and a cap 56 biased by a coil spring 55 to a position where the steel balls 54 are locked in a state where they are protruded inward. It has. On the other hand, a groove 57 with which the steel ball 54 is engaged is formed in the outer periphery of the plug 52.

When connecting the plug 52 to the socket 53, the plug 52 is first inserted into the socket 53 with the cap 56 moved in the direction of arrow A to free the rope 54. Then, when the cap 56 is returned to the original position (lock position) by the spring force, the rope 5
4 is locked while engaged with the groove 57 of the plug 52.

Reference numeral 58 denotes an O-ring for sealing.

[0006] Such a conventional one-touch joint 51 requires a large number of parts and requires high dimensional accuracy.
It will be expensive. In addition, since a steel ball is used for the lock, plastic deformation often occurs due to a large number of connections and separations, and play is likely to occur.

In order to facilitate attachment and detachment, the present applicant has previously disclosed FIGS. 8 and 9 (Japanese Patent Application No. Hei 6-11587).
No. 2), eccentric rings 62, 82 are provided on plugs 63, 83.

In FIG. 8, the one-touch joint 61 has an O-ring 65 attached to the outer peripheral surface near the tip of the plug 63, and is joined while maintaining the sealing property when the plug 63 is inserted into the inner diameter side of the socket 64. is there. An eccentric ring 62 urged by a coil spring 66 in a direction eccentric to the axis of the plug 63 and the socket 64 is loosely fitted near the root of the O-ring 65. The eccentric ring 62 is substantially immovable in the axial direction on the outer periphery of the insertion portion of the plug 63 by a guide ring 67 and a snap ring 68, and is movable in a direction biased by a coil spring 66. An eccentric groove 69 that is slightly eccentric with respect to the axis of the socket 64 and into which the eccentric ring 62 can be fitted is provided on the inner peripheral side of the socket 64.
Is engraved. Therefore, if the plug 63 and the socket 64 are fitted and the eccentric ring 62 and the eccentric groove 69 are engaged with each other, the two cannot be removed from each other. The through-hole 70 allows a pin to be inserted from the outside to press the eccentric ring 62 when the plug 63 is to be pulled out, whereby the engagement between the eccentric ring 62 and the eccentric groove 69 is released. Can be.

The one-touch joint 81 shown in FIG.
8, the configuration of the main part of the plug 83 is the same as that of the plug 63 of FIG. 8, and the eccentric ring 82 is urged by the coil spring 85 in the eccentric direction. An annular groove 86 is provided on the inner peripheral side of the socket 84 so that the eccentric ring 82
Can be engaged at any position in the circumferential direction. The eccentric ring 82 is pressed by inserting a pin into the through hole 87, the engagement between the eccentric ring 82 and the eccentric groove 86 is released, and the plug 83 can be removed.

[0010]

The one-touch joint 61 shown in FIG. 8 has a simple structure and can be manufactured at low cost, and does not cause backlash, but the eccentric ring 62 has an eccentric groove 69.
There is a problem that the circumferential positioning must be firm so as to engage with the.

That is, the eccentric ring 62 cannot be engaged with the inner peripheral surface other than the eccentric groove 69. If the eccentric ring 62 is displaced in the circumferential direction after fitting, the engaged state is released, and the socket 64 and the plug 6
3 comes off. Therefore, a projection 71 and a recess 72 are provided on the socket 64 and the plug 63 in order to prevent such a detachment, and seal the movement in the circumferential direction. Therefore, depending on the installation location, the hose may be twisted,
In order to absorb the torsion, the hose needs to have a certain length, and there is a problem that the piping layout is inflexible.

In the one-touch joint 81 shown in FIG. 9, the plug 83 can be freely rotated, so that the above-mentioned problem caused by the torsion of the hose can be solved. The eccentric ring 82 cannot be pressed properly unless the position of the marker M indicating the direction is aligned with the position of the through hole 87. Therefore, while watching the marker M, the plug 83
And the socket 84 are supported by both hands so as not to rotate, and the pin is inserted through the through-hole 87 so that the eccentric ring 82
The problem remains that pressing alone can force a difficult task.

An object of the present invention is to provide a one-touch joint in which such a disadvantage is solved and which is further improved.
In other words, the structure is simple, tough and low cost, and the plug can be rotated at the time of fitting,
Moreover, an object of the present invention is to provide a one-touch joint that can be easily detached.

[0014]

A one-touch joint according to the present invention comprises a plug having a substantially cylindrical shape, a socket for fitting the plug on the inner diameter side thereof, and the plug or the plug for sealing a joint between the plug and the socket. (A) providing an annular engagement groove on the outer periphery of the plug, (b) providing a mounting groove on the inner periphery of the socket, and (c) providing the mounting member. A hole is provided at the bottom of the groove in a radial direction; (d) a biasing means is provided at a position facing the hole of the mounting groove; (e) an inner diameter thereof is substantially equal to an outer diameter of the plug; An annular eccentric ring biased in a direction eccentric by means is provided in the mounting groove, and
And at least one of the sockets has its inner diameter passage closed
A closing membrane member for closing is formed.
While maintaining the inner diameter side passage of the above, the closing membrane member is destroyed.
Characterized in that it is provided with destruction means .

[0015]

[0016]

In the one-touch joint of the present invention, the plug is inserted into the socket by engaging an eccentric ring inside the socket, which can be biased by the biasing means, into an engagement groove provided on the outer periphery of the plug. It can be easily joined just by doing.

The engagement groove has an annular shape, and the eccentric ring can be engaged at any position in the circumferential direction, and the socket and the plug are rotatable when fitted. The eccentric ring is loosely fitted in a mounting groove having a biasing means provided on the inner periphery of the socket, a knockout pin is inserted into the through hole to press the eccentric ring, and the eccentric state is opposed to the biasing means. Release and unplug. Also, a closing membrane member and the closing membrane member
By providing destruction means for destroying
The internal fluid was filled in the pipe (the one with the closing membrane member)
Even if it is still connected, it can be easily connected without leaking to the outside.
I can.

[0018]

Next, a one-touch joint according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the one-touch joint of the present invention, FIG. 2 is an explanatory sectional view taken along line II-II of FIG. 1, and FIG. 3 is another embodiment of the one-touch joint of the present invention. 4 is a sectional view taken along a line corresponding to line III-III in FIG. 1, FIG. 4 is a sectional view before connection showing another embodiment of the one-touch joint of the present invention, and FIG. FIG. 6 is a perspective view showing one example of a cutter in the one-touch joint of FIG. 4.

As shown in FIG. 1, the one-touch joint 1 is
It comprises a plug 2 having a substantially cylindrical shape, and a socket 3 for fitting the plug 2 inside the plug 2. An O-ring 4 is provided on the outer periphery of the insertion portion of the plug 2,
The joint between the plug 2 and the socket 3 is sealed. As a sealing member that plays the role of such a seal, a donut plate-shaped gasket other than the O-ring is used.
Those affixed to, for example, can also be adopted. The number of O-rings 4 is not limited to one, and two or more O-rings can be provided as shown in FIG. The one-touch joint of the present invention is different from the one proposed earlier (see FIGS. 8 and 9) in that an eccentric ring 6 is provided on the socket 3 side, not on the plug 2 side.

The plug 2 has an insertion portion 8 inserted into the socket 3 and a connection portion 9 connected to a hose or a pipe (not shown), with a flange 7 formed at an intermediate portion of the outer peripheral surface of the plug 2 interposed therebetween. Are formed. An O-ring 4 is fitted on the outer periphery of the distal end side of the insertion portion 8, and an annular engagement groove 10 having the same center as the axis of the plug 2 is formed on the base side.

One end of the socket 3 is a fitting portion 11 into which the plug 2 is inserted, and the other end is a connecting portion 12 to which a hose or a pipe (not shown) is connected.
The inner diameter portion 11a of the fitting portion 11 is substantially equal to the outer diameter of the plug insertion portion 8, and is larger than the small diameter portion 12a of the connecting portion 12. The small diameter portion 12a of the connecting portion 12 is equal to the inner diameter of the plug 2 and is continuous with the inner diameter portion 11a so that the stepped surface 13 can be formed at a position where the tip 5 of the plug 2 reaches and contacts.
Thereby, the fluid smoothly moves between the inside of the plug 2 and the small diameter portion 12a of the socket 3.

As shown in FIG. 2, a mounting groove 14 is provided in the vicinity of the tip of the fitting portion 11 of the socket 3 by a method described later, and the eccentric ring 6 is loosely fitted therein. A biasing means 15 is provided in the mounting groove 14,
A through-hole 16 is formed at the bottom of the mounting groove 14 on the opposite side of the axis in the direction in which the biasing means 15 biases. When the lock-out pin 17 is inserted from the through hole 16 and the eccentric ring 6 is pressed, the eccentric ring 6 can be pressed against the urging force of the urging means 15, so that the eccentric state of the eccentric ring 6 can be released.

Next, the one-touch joint of the present invention will be described in more detail with reference to FIG. FIG. 3 shows a state in which the eccentric ring 6 loosely fitted in the mounting groove 14 is urged to the groove bottom 10 a of the engaging groove 10 of the plug 2, and the plug 2 is locked to the socket 3. The center O2 of the eccentric ring 6 is eccentric with respect to the axis O1 of the plug 2 and the socket 3. Since the groove bottom 10a of the engagement groove 10 provided on the outer periphery of the plug 2 is a circle centered on the axis O1, the plug 2 can rotate in the circumferential direction (arrow B). Therefore, after connecting the hose at a limited installation place, the operator can easily rotate the plug 2 to eliminate the twist even if the twist occurs. Therefore, it is possible to omit a hose having a certain length necessary for absorbing the twist, and to improve the flexibility of the piping layout.

The shape of the mounting groove 14 is preferably a land-like track having a semicircle having an inner diameter equal to the outer diameter of the eccentric ring 6. However, at least the distance required for the movement of the eccentric ring 6 may be a circle whose diameter is the length obtained by adding the outer diameter of the eccentric ring 6. Further, since it is sufficient that the eccentric ring 6 can be loosely fitted so as to be movable, other shapes such as an ellipse and a polygon can be used. Also, the socket 3 is usually formed by cutting a cylindrical one. In this case, since it is difficult to directly form a groove in the inner periphery like the mounting groove 14, as shown in FIG. 4, a cutting machine such as a drilling machine starts from the insertion side 3a of the plug 2 of the socket 3 as shown in FIG. The inner diameter portion 11a, the mounting groove 14 and the smaller hole are sequentially cut to form a hole 22 having a slightly larger inner diameter than the mounting groove 14 on the insertion side 3a.
Is easily fixed by a caulking, screwing or snap ring 24 to form the mounting groove 14, which is preferable from the viewpoint of cost. A chamfered portion 23a is formed at an inner diameter side end of the guide ring 23 in the insertion side 3a direction. The end of the plug 2 on the tip side is also chamfered 2a to facilitate the insertion of the plug.

The biasing means 15 is preferably a leaf spring as shown in FIG. 3 because it does not require a mounting space, is inexpensive, is easy to mount, and has a small height when compressed. However, a coil spring as shown in FIG. 1 may be used, and a leaf spring or an elastomer such as urethane rubber may be used. Further, it is preferable that the urging means 15 using a leaf spring is provided with small projections 18 and 19 at the bottom of the mounting groove 14 and fixed at both ends thereof so as to be hooked. Further, one end of the leaf spring may be attached to the groove bottom and fixed. In the biasing means 15 using a coil spring as shown in FIG. 1, it is preferable to provide a round small hole at the bottom of the groove, insert the spring, and attach it with an adhesive or the like. Instead of the small hole, a small projection may be used.

The through hole 16 is provided at the bottom of the mounting groove 14 so as to penetrate the outside in the radial direction. Further, it is formed just on the opposite side of the urging means 15 with respect to the axis O1. Therefore, if the knockout pin 17 is inserted into the through hole 16, the eccentric ring 6 can always be pressed against the urging force of the urging means. This eliminates the need for positioning the plurality of through holes 87 and the plugs 83 and the sockets 84 as in the conventional one-touch joint 81 shown in FIG.

The eccentric ring 6 has a circular shape in which the inner diameter 20 and the outer diameter 21 are concentric. The inner diameter 20 is formed slightly larger than the outer diameter of the insertion portion 8 of the plug 2 shown in FIG. Further, as shown in FIG. 4, it is preferable that a chamfer 6a is formed on the inner diameter side end of the insertion side 3a in order to insert the plug 2 smoothly.

The plug 2 and the socket 3 of the present invention
Is preferably made of a metal such as brass or aluminum in terms of strength and durability. However,
From the viewpoint of low cost, a synthetic resin can also be used.

Next, another embodiment of the one-touch joint of the present invention will be described with reference to FIG.

The one-touch joint 30 shown in FIG.
3 is provided with a cutter 31. The closing membrane member 29 enables the fluid to be retained inside a hose or a pipe (not shown) connected to the plug 2, and the cutter 31 breaks the closing membrane member 29 at the time of connection, and the fluid is discharged into the socket. It is made to be able to flow to the third side.

It is also possible to attach the cutter 31 to the plug 2 and the closing film member 29 to the socket 3.
However, from the viewpoint of safety, it is preferable to attach the cutter 31 to the socket 3 so as to hold the cutter 31 inside. Furthermore, it is also possible to attach a closing membrane member to both the plug 2 and the socket 3, and it is also possible to attach a valve system or the like that is easy to reseal when the joint is removed.

The closing film member 29 in this embodiment is made of a highly malleable metal such as brass, for example, and has a bottomed cylindrical shape as shown in FIG. Thin enough to be destroyed by Then, the cylindrical portion 29b of the closing membrane member 29 is inserted from the tip of the plug 2 to the inner diameter side thereof and fixed by brazing.

On the other hand, as shown in FIG. 6, the cutter 31 is made of a high-strength metal such as stainless steel, has a cylindrical shape, and has a flange portion 32 formed at an intermediate portion of its outer peripheral surface. . The cylindrical portion on one side of the flange 32 is a socket 3
Is a portion to be press-fitted into the small-diameter portion 12a (see FIG. 4) on the inner diameter side, and its outer peripheral surface is subjected to knurling R. The tip of the cylindrical portion on the other side of the flange portion 32 is cut obliquely to form a blade portion 31a.

The one-touch joint constructed as described above can be suitably used for a refrigerator or a cooling machine. That is, the plug sealed by the closing film member is attached to a pipe such as a refrigerant tank filled with the refrigerant, and the socket is attached to the pipe to be connected.

[0036] In this case, it is possible to pre-fill the refrigerant into the refrigerator or the like.
The last piping operation allows the refrigerant to easily spread to the necessary parts. In addition, the refrigerant does not leak when the joint is connected. Therefore, transportation, assembly, and installation work of the refrigerator and the like become extremely easy.

[0037]

According to the present invention, pipes and hoses can be easily and reliably connected and disconnected even if the pipes are for high-pressure fluid, and the sealing function is sufficiently exhibited.
Moreover, since the structure is simple, it is strong and inexpensive.

Further, since the eccentric ring provided on the inner periphery of the socket is engaged with the annular engaging groove provided on the outer periphery of the plug, the socket and the plug can be relatively rotated. Flexibility in the layout of the piping can be improved. Further, an eccentric ring is loosely fitted by providing a biasing means in a mounting groove provided on the inner periphery of the socket, but a through hole is also provided in the mounting groove, and a pin is inserted into this through hole to allow eccentricity. By simply pressing the ring, the plug can be easily pulled out of the socket without any need for alignment between the plug and the socket. In addition, the closing membrane member
Even if the piping with the inner fluid is still filled,
Connection work can be easily performed without leakage to the outside.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of a one-touch joint of the present invention.

FIG. 2 is an explanatory sectional view taken along line II-II of FIG.

FIG. 3 is a view of another embodiment of the one-touch joint of the present invention, and is a cross-sectional view taken along a line corresponding to line III-III in FIG.

FIG. 4 is a sectional view showing another embodiment of the one-touch joint according to the present invention before connection.

FIG. 5 is a perspective view showing an example of a closing film member in the one-touch joint of FIG. 3;

FIG. 6 is a perspective view showing an example of a cutter in the one-touch joint of FIG.

FIG. 7 is a sectional view of a main part showing an example of a conventional one-touch joint.

FIG. 8 is a partially cutaway perspective view showing another example of a conventional one-touch joint before assembly.

FIG. 9 is a partially cutaway perspective view before assembling showing still another example of the conventional one-touch joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30 One-touch joint 2 Plug 3 Socket 4 O-ring 6 Eccentric ring 10 Engagement groove 14 Mounting groove 15 Energizing means 16 Through hole 29 Closing membrane member 31 Cutter

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-47219 (JP, A) JP-A 50-2716 (JP, U) JP-A 51-91324 (JP, U) JP-A 51-913 6522 (JP, U) JP 46-37557 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 37/00-37/28

Claims (1)

(57) [Claims] 1. A one-touch joint comprising a plug having a substantially cylindrical shape, a socket for fitting the plug on the inner diameter side thereof, and a seal member provided on the plug or the socket for sealing a joint between the plugs. (A) providing an annular engagement groove on the outer periphery of the plug; (b) providing a mounting groove on the inner periphery of the socket; (c) a hole penetrating radially through the bottom of the mounting groove. (D) a biasing means is provided at a position facing the hole of the mounting groove; and (e) an inner diameter thereof is substantially equal to an outer diameter of the plug, and the plug is biased in an eccentric direction by the biasing means. An annular eccentric ring is provided in the mounting groove, and at least one of the plug and the socket has an inner diameter.
A closing membrane member for closing the side passage is formed,
On the other hand, while holding the inner diameter side passage, the closing membrane member is
A one-touch joint comprising a destruction means for destruction .