JP3428127B2 - Coupling structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling structure in which a pair of connecting bodies are fitted and engaged to form a sealed storage container.

[0002]

2. Description of the Related Art For example, in a water purifier coupling, one coupling body (first coupling body) on the receiving side and the other coupling body (second coupling body) on the insertion side. Is a structure in which a coupling structure is detachably and hermetically fitted, and a water inlet is provided in one of the connecting bodies, and a drain outlet is provided in the other connecting body, for purifying water in a storage container formed by connection. The filter is replaceably stored.

Conventionally, in a coupling structure such as such a water purification coupling, an O-ring for sealing is simply interposed at a coupling engaging portion, and a V-shaped band is wound around to be tightly fitted and hermetically engaged. Although it was a structure that was made, it was difficult to engage and disengage, and the manufacturing cost was high.

In view of the above situation, the present invention can firmly seal and engage by simply inserting the one connecting body into the other connecting body and rotating the connecting body, resulting in excellent operability and low manufacturing cost. The purpose is to provide an excellent detachable coupling structure.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

[0006] Of the pair of connecting bodies which are fitted and engaged to form a storage container, the inclination of the opening edge portion of the first connecting body 1 on the fitted side.
Forming a groove 3 to the oblique inner peripheral surface, and the inwardly projecting state to the recessed groove 3 is fitted an O-ring 4 having a flexible elastic, the second connecting member 2 of the opening edge portion of the side to be inserted On the inclined inner peripheral surface
A locking taper surface for locking is formed to form a pressing edge portion 5 for pressing and abutting the O-ring 4, and a predetermined thickness is formed inwardly on the inner peripheral surface of the opening edge portion of the first coupling body 1. A plurality of first engaging projections 6 are provided so as to be spaced apart from each other in the circumferential surface direction, an insertion gap 7 is formed between the first engaging projections 6, and the first engaging projections 6 and the recesses are formed. A rotary slide gap 8 is formed between the grooves 3, and the second connecting body 2 is inserted into the outer peripheral surface of the opening edge portion of the second connecting body 2 through the insertion gap 7 so that the second connecting body 2 is relatively opposed to the first connecting body 1. A plurality of second engaging protrusions 9 having a predetermined thickness, which are inserted into the rotating slide gap 8 by rotating and are slidable and superposed with the first engaging protrusion 6, are provided at intervals in the circumferential direction. Then, the guide taper surface 10 for guiding the sliding overlap is formed at the end of the first engaging projection 6 or the second engaging projection 9 in the circumferential surface direction. The thickness of the engaging projections 6 and 9 is adjusted so that the first and second engaging projections 6 and 9 slide and polymerize through the guiding taper surface 10 to form the first connecting body 1 and the second connecting body 2. when it is locked retaining engagement omission, the pressing edge portion 5 of the second coupling member 2 is set to O-ring 4 of the first coupling member 1 so as to press contact with the sealing structure, the first engaging Gototsutai 6 or the second engagement projection
Sliding and superimposing on the body 9 through the guide surface 10
A weight by which the first connecting body 1 and the second connecting body 2 are retained and locked.
A positioning recessed step portion 11 for positioning and locking the mating position is provided.
And a coupling structure characterized by:

The width of the first engaging protrusion 6 in the circumferential direction is set to be at least twice the width of the second engaging protrusion 9 in the circumferential direction. It relates to a coupling structure.

Further, the side wall of the concave groove 3 is formed as a taper wall 12 in which the opening width of the concave groove 3 is narrower than the depth of the groove, and the O-ring 4 is press-fitted into the concave groove 3. Characterizing
The present invention relates to the coupling structure according to any one of claims 1 and 2 .

[0009]

The relative rotational position of the second connecting body 2 with respect to the first connecting body 1 is adjusted so that each second engaging projection 9 can be inserted into each insertion gap 7 between the first engaging projections 6. Then, the second engaging convex body 9 is inserted into the insertion gap 7 and the second connecting body 2 is inserted into the first connecting body 1.

When the second connecting body 2 is rotated relative to the first connecting body 1 in this state, the second engaging convex body 9 causes the first engaging convex body 9 to rotate.
The first connecting body 1 and the second connecting body 2 are fitted and engaged with each other in a retaining state by laminating and superposing on the back side of the body 6 .

At this time, since the guiding taper surfaces 10 are provided at the ends of the first and second engaging projections 6 and 9, the first engaging projections 6 and the first engaging projections 6 are gradually guided while being guided by the guiding taper surface 10 . Second person
The combined convex body 9 is rubbed and polymerized. Therefore, the guiding taper surface 10 causes the pressing edge portion 5 of the second connecting body 2 to gradually press the O-ring 4 of the first connecting body 1.

When the first engaging convex body 6 and the second engaging convex body 9 are completely rubbed and superposed, the pressing edge portion 5 presses the O-ring 4 and is sealed, and the first engaging convex body 6 is sealed. The superposition state of the second engaging convex body 9 and the second engaging convex body 9 is positioned by fitting and engaging with the positioning concave step portion 11.

[0013]

EXAMPLE In this example, the present invention is applied to the coupling for a water purifier described in the conventional example, each part is made of stainless steel, and the lost wax and NC cutting processes are reduced as much as possible, and the product is manufactured by press working and spin processing. However, NC processing is used for partial finishing.

In this embodiment, a projecting flange 13 which projects inward is formed slightly behind the opening edge of the first connecting body 1 which is the container on which the projecting flange 13 is fitted. The groove 3 is formed on the peripheral surface.

The opening width of the concave groove 3 is set to be slightly narrower than the rod diameter of the O-ring 4, and both side walls of the concave groove 3 are formed into tapered walls 12 which become wider toward the inner part of the groove. The O-ring 4 is press-fitted and fixed so that the inner peripheral portion of the O-ring 4 projects slightly inward.

By making the side wall of the concave groove 3 a taper wall 12, the O-ring 4 is prevented from easily coming off.

On the other hand, at the opening edge of the second connecting body 2 which is the container on the inserting side, the slanting inner peripheral surface of the projecting collar portion 13 is abutted and locked, and protrudes from the concave groove 3 of the slanting inner peripheral surface. The O-ring 4 is pressed to form a locking tapered surface that can crush the O-ring 4 to form the pressing edge portion 5.

Further, four inwardly projecting first engaging projections 6 having a predetermined thickness are provided on the inner peripheral surface of the opening edge of the first connecting body 1 at regular intervals in the peripheral surface direction. A predetermined interval is provided on the outer peripheral surface of the opening edge of the two connecting body 2 so that the second engaging projection 9 having a predetermined thickness can be inserted outward from the insertion gap 7 between the first engaging projections 6. And four are protruding.

Further, a rotary slide gap 8 into which the second engaging convex body 9 can be rotationally slid and inserted is formed between the first engaging convex body 6 and the protruding flange portion 13, and the first engaging convex body is formed. Each insertion gap between 6
The first connecting body 1 is fitted onto the second connecting body 2 so that the respective second engaging convex bodies 9 are inserted into the second connecting body 2, and the second connecting body 2 is relatively rotated in this state to make the first engagement. The convex body 6 and the second engaging convex body 9 are overlapped with each other to lock and prevent from falling off, and the pressing edge portion 5 presses the O-ring 4 to hermetically lock it.

In this case, in order to press the pressing edge portion 5 against the O-ring 4, the first connecting member 2 is pressed and inserted into the first connecting member 1 with a strong force so that this state is maintained. It is conceivable to rotate the two connecting bodies 2 relative to each other, but in this case, the second connecting body 2 must be strongly pushed and rotated as it is, and if the outer diameter of the second connecting body 2 becomes large. It is difficult to operate and the O-ring 4 cannot be pressed with strong adhesion.

Therefore, in this embodiment, the second connecting body 2 is used.
The pressing edge 5 presses the O-ring 4 by rotating it relative to the first connecting body 1, and this pressing force is gradually generated so that the turning operation can be further facilitated. As described above, the guiding taper surface 10 is formed on the first and second engaging convex bodies 6 and 9.

This guiding taper surface 10 is provided on both the first engaging projection 6 and the second engaging projection 9 in this embodiment.

Therefore, as shown in FIG. 4, the first engaging projection 6
Guide flat surface 14 is introduced to the end of the taper surface 10
Is formed, and a guide taper surface 10 that matches the guide taper surface 10 is also provided at the end of the second engaging convex body 9.

Therefore, the second engaging projection 9 is inserted through the insertion gap 7 between the first engaging projections 6, the second connecting body 2 is inserted into the first connecting body 1, and the second connecting body 2 is further inserted. When the second engaging convex body 9 is inserted into the rotary slide gap 8 by relatively rotating, the rear guiding taper surfaces 10 that are once guided by the flat guide portion 14 abut against each other and further rotate. Relatively second engaging convex body 9
Rides on the first engaging projection 6, and at this time, the pressing edge 5 gradually presses the O-ring 4 as described above, and the second engaging projection 6 is completely pushed onto the first engaging projection 6. When the body 9 climbs up and is laminated and polymerized, the O-ring 4 is crushed and hermetically fitted.

At this time, in this embodiment, the positioning concave step portion 11 is formed on the overlapping surface of the first engaging convex body 6, and the positioning concave step portion 11 is formed.
Although the second engaging projection 9 fits into 11 and the pressing force is slightly relaxed (designed so as to be allowed), this seal-overlapped sealed retaining fit state is maintained.

Further, in this embodiment, the width of the first engaging projection 6 is set to be approximately twice the width of the second engaging projection 9 and the engaging projections 6 and 9 are formed.
Introducing tapered surfaces 10 are provided at both ends of each of the first engaging projections 6
A wide positioning concave step portion 11 is formed on the second side so that even if the second connecting body 2 is turned to either side, the sealing slip-off prevention fitting can be performed at a slight turning angle.

[0027]

Since the present invention is constructed as described above, a strong sealing engagement can be achieved simply by inserting the one connecting body into the other connecting body and rotating it, resulting in extremely excellent operability and manufacturing cost. It has an excellent and detachable coupling structure that does not cost much.

Moreover, in the present invention, the second connecting body is connected to the first connecting body.
Pushing against the locking taper surface by rotating relative to the body
The pressing edge presses against the O-ring provided on the inclined peripheral surface.
It is caused by making it easier to perform the turning operation.
First and second engagement to gradually generate this pressing force
Form a guiding taper on the convex body and insert it between the first engaging convex bodies.
Insert the second engaging convex body from the insertion gap and connect the second connecting convex body to the second connecting body.
Insert the union and then rotate the second union relatively to engage the second
When inserting the convex body into the rotary slide gap,
The second engaging projection relatively by rotating further by
The body gradually climbs onto the first engaging convex body, and at this time
The pressing edge, which is a tapered surface that locks to, gradually presses the O-ring.
Then, the second engaging convex body climbs up completely on the first engaging convex body.
The O-ring is crushed when sealed and polymerized.
To meet. Moreover, at this time, in the present invention, the weight of the first engaging convex body is increased.
A positioning concave step is formed on the mating surface, and this positioning concave step is
The second engaging convex body gets stuck, and the pressing force is slightly loosened (allowance
Although it is designed to be
The position of the seal stopper fitting position is maintained, so the second
When the unit is rotated, the locking taper surface gradually moves the O-ring
A tight sealing engagement can be achieved while pressing, and this sealed state
It can be held, is extremely easy to operate, and does not cost much to manufacture.
It has an excellent detachable coupling structure.

[Brief description of drawings]

FIG. 1 is an explanatory exploded perspective view of the present embodiment.

FIG. 2 is an explanatory sectional view in which a main part of this embodiment is cut away.

FIG. 3 is an explanatory front sectional view in which a main part of the present embodiment is cut away.

FIG. 4 is an enlarged explanatory view showing a relationship between a first engaging convex body and a second engaging convex body of the present embodiment.

FIG. 5 is an enlarged front cross-sectional view of a main part with a second connection body of the present embodiment inserted.

FIG. 6 is an enlarged front cross-sectional view of a main part in a hermetically sealed state by rotating after inserting the second connecting body of the present embodiment.

[Explanation of symbols]

1 first connection 2 Second connected body 3 concave groove 4 O-ring 5 pressing edge 6 First engaging convex body 7 Insertion gap 8 Rotating slide gap 9 Second engaging convex body 10 Induction taper surface 11 Positioning step 12 taper wall

Claims (3)

(57) [Claims] 1. A tilt of an opening edge portion of a first connecting body on a side to be fitted, of a pair of connecting bodies that are fitted and engaged to form a storage container.
Forming a groove on the swash inner peripheral surface, and the inwardly projecting state to the recessed groove fitted an O-ring having a flexible elastic, the opening edge portion of the second connecting member insertion sides, said inclined Lock on inner surface
A locking taper surface is formed to form a pressing edge portion for pressing and abutting the O-ring, and a first engaging convex body having a predetermined thickness is formed inwardly on the inner peripheral surface of the opening edge portion of the first connecting body. Are provided so as to be spaced apart from each other in the circumferential direction, and an insertion gap is formed between the first engaging projections, and a rotary slide gap is formed between the first engaging projections and the groove. A second connecting body is inserted into the outer peripheral surface of the opening edge portion of the second connecting body through the insertion gap, and the second connecting body is inserted into the rotary slide gap by rotating the second connecting body relative to the first connecting body; A plurality of second engaging protrusions having a predetermined thickness capable of sliding and superposing with the engaging protrusions are provided at intervals in the circumferential surface direction, and the peripheral surface of the first engaging protrusion or the second engaging protrusion. A guide taper surface for guiding the sliding overlap is formed at the end in the direction, and the thickness of each of the first and second engaging projections is set by the first and second engaging projections. When the first connecting member by sliding together polymerized via viewed tapered surface and the second connecting member is locked retaining engagement omission,
The pressing edge portion of the second connecting body is set so as to press and contact the O-ring of the first connecting body to form a sealed structure, and the first engagement
A guide surface is provided on the convex body or the second engaging convex body.
The first connecting body and the second connecting body are separated by sliding and superposing through
Positioning to lock overlapping position to be locked
Coupling structure characterized by having a concave step . 2. The coupling according to claim 1, wherein the circumferential width of the first engaging projection is set to be at least twice the circumferential width of the second engaging projection. Construction. 3. A process according to claim in which the opening width of the side wall of the groove groove is formed narrower tapered wall compared to Mizooku unit, characterized in that allowed press-fitting the O-ring in the groove One and two
The coupling structure according to any one of items .