JP3378083B2 - Male body structure for fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for automobiles, construction machines, machine tools and the like, and more particularly to a male pipe joint structure suitable for connecting and separating pipes in a narrow space. It is related.

[0002]

2. Description of the Related Art In recent years, hydraulic control has been generally adopted as a control means for various machines, and accordingly, piping such as a hydraulic hose has been provided. Various joints for connecting these hoses have been proposed.

FIG. 1 shows a ball lock type joint which is a typical example of the joint. A male body (nose) 52 connected to a pipe (hose) 51 is fitted into a female body (body) 53, The structure is such that the steel balls 58 are inserted between the respective facing concave portions and are joined together and sealed by the O-ring 55. The steel balls 58 are brought into contact with the lower surface of the collar 54 inserted by compressing the color spring 56 and locked, and the collar 54 is locked to the body 53 by the stop ring 57.

Further, FIG. 2 was developed by the present inventors (Japanese Patent Application No. 4-
88026, etc.) is an example of a pipe joint
Grooves 63 and 64 are formed on the opposing surfaces of the nose 61 and the body 62, respectively, and an annular elastic ring 65, part of which is cut away, is fitted in the air space formed by these grooves. Then, an annular pressing piece 67 integrated with the annular cover 66 is inserted into the gap between the nose 61 and the body 62 and faces the annular elastic ring 65. Ring cover-6
Reference numeral 6 covers the spring 68 fitted around the outer circumference of the body 62 and is constantly elastically pressed in the axial direction of the pipe. A flange portion 69 is provided on the outer periphery of the nose 61, and the annular cover 66 is brought into contact with the flange portion 69 to elastically move.

When the two bodies are joined, the annular elastic ring 65 is inserted into the groove 6 by inserting the nose 61 into the tip side.
Groove 63 formed in the outer surface of the nose 61, which has been expanded in diameter
It will be reduced to the original diameter inside. on the other hand,
At the time of separation, the nose 61 is pushed toward the tip side, and the annular elastic ring 65 is expanded and pushed out into the groove 64. When the nose 61 is further pushed, the collar portion 69 of the nose 61 pushes the annular cover 66, and the annular pressing piece 67 integrated with this is also pushed to the tip side. And the annular elastic ring 6
5 and the nose 61, the annular elastic ring 65 is interrupted.
Will be held in the groove 64 in a state of being expanded in diameter. In this state, while pressing the annular cover 66 with a finger,
It is possible to separate the two by pulling out the gap 61 in the opposite direction.

[0006]

However, in the operation of connecting and disconnecting the nose and the body, it is usually necessary to support one or both of them with a hand or a jig, and to operate the work space. This will limit the use in places with narrow spaces. Moreover, automobiles and the like are becoming more and more compact, the work space as described above is narrowed, and the case and the body are less likely to be arranged on a straight line.
There are many examples where the head is bent 90 degrees with respect to the body.

Therefore, when connecting the nose and the body,
There are many cases where it is difficult to insert the insert straight and it is difficult to pull out even when separating. It is an object of the present invention to provide a nose structure for facilitating the binding / separation of the nose and body.

[0008]

In order to achieve the above object, the present invention provides a male body (nose) structure of a pipe joint. That is, the gist of the present invention is to insert and connect a male body (nose) into a female body (body), move the male body (nose) to the tip side, and push the annular cover of the female body (body). To move the male body (nose) to the tip side on the outer peripheral surface of the male joint (nose) that is separable from each other and is close to the fitted portion of the male body (nose). The structure of a male body (nose) for pipe joints that can be connected and separated, characterized in that a flange is formed on the outer periphery of the pressing protrusion in the opposite direction to the tip of the male body (nose). It is related to.

The pressing protrusion is welded to the outer peripheral surface of the nose, or a step is formed on the outer peripheral surface of the nose, and the pressing protrusion is fitted into this step. In the latter case, Alternatively, a retaining ring may be fitted into the step together with the pressing protrusion. Further, even when the step portion is formed by forming the base portion of the nose with a large diameter and the portion to be fitted into the body with a small diameter to form a step portion, a continuous or discontinuous protrusion is formed in the circumferential direction of the outer peripheral surface of the nose. Alternatively, the stepped portion may be separated from the fitted portion. Further, it is particularly preferable that the pressing protrusion is an annular protrusion and the plane of the pressing protrusion and the axis of the nose are orthogonal to each other.

[0010]

The structure of the pipe joint nose of the present invention has the above-mentioned structure, and its operation will be described in detail with reference to a preferred structure example thereof. The driver is pressed against the pressing (annular) protrusion toward the tip of the nose along the surface of the nose. Here, the tip of the driver and the pressing (annular) protrusion come into contact with each other, and by further pushing the driver, the nose moves to the tip side (body side), which facilitates coupling and separation of the two. In particular, in the case of a curved nose, the nose is pushed at a substantially right angle to the body, so that it is easy to connect and separate the two. At the time of contact between the driver and the pressing (annular) protrusion, since the flange opposite to the tip of the nose is formed especially around the pressing (annular) protrusion, the contact between the two becomes reliable. It is easy to combine and separate.

[0010]

The structure of the nose for a pipe joint of the present invention has the above-mentioned structure, and its operation will be described in detail with reference to a preferred structure example thereof. The driver is pressed against the pressing (annular) protrusion along the surface of the nose toward the tip of the nose. Here, the tip of the driver comes into contact with the annular protrusion, and by further pushing the driver, the nose moves to the tip side (body side), and it is easy to connect and separate the two. In particular, in the case of a curved nose, the nose is pushed almost at a right angle to the body, so that it is easy to connect and separate the two.
When the driver and the annular protrusion are brought into contact with each other, a flange opposite to the tip of the nose is formed especially around the annular protrusion so that the contact between the two becomes reliable and easier than coupling / separation. It will be.

[0011]

EXAMPLES The present invention will be described in more detail with reference to the preferred specific examples, but it goes without saying that the present invention is not limited to these examples. 3 is a partially cut side view of the pipe joint nose of the present invention having a structure that can be used for the pipe joint of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is an exploded view thereof. 6 is a plan view of the annular protrusion, and FIG. 7 is a plan view of the retaining ring.

In the figure, 41 is an annular protrusion and 42 is a C-shaped retaining ring. Bruno - 2 Part substrate 2 ₁ and the tip portion (the fitting portion)
2 ₂ has a base 2 ₁ having a large diameter and a tip 2 ₂ having a small diameter step 2 ₃
Forming a circumferential groove 2 ₄ wheel 42 fixed to the distal end portion 2 ₄ is fitted
Are formed.

[0013] Also, the annular projections 41 Bruno on its periphery - are those flange 41 ₁ of the opposite direction is formed and the distal end portion 2 ₂ 2, further bore to mate to the distal end portion 2 ₂ 41
₂ is formed. Then, first, the inner diameter portion 41 ₂ of the annular protrusion 41 is fitted to the tip portion 2 ₂ of the nose 2,
Then fitted retaining ring 42 to the circumferential groove 2 ₄ Bruno - and thus to fix the annular projections 41 in FIG. Of course, the annular protrusion 41
The flange 41 ₁ formed in the above is installed so as to project toward the base 2 ₁ side of the nose 2. By pushing a pressing body, for example, a minus driver 30 from the side of the base 2 ₁ of the nose 2 along the nose 2, the driver 30 and the annular protrusion 41 come into contact with each other, and the driver 30
The tip due to the presence of the flange 41 ₁ with the annular projections 41, even if a force, also the contact angle between them was slightly, but it is eliminated this is disengaged.

FIG. 8 is a side view of another example of the pipe joint nose of the present invention, FIG. 9 is a front view of FIG. 8, and FIG. 10 is a sectional view thereof. In this example, a non-annular pressing projection 41 is welded to the nose 2, and the nose 2 is welded as shown in the figure.
When the groove 2 is bent, the pressing protrusion 41 may be welded to the outer edge side thereof.

FIG. 11 is a partially cut sectional view of the pipe joint 1 when the nose 2 shown in FIG. 3 is connected to the body 3. Now, a nose 2 connected from a tubular body (not shown) is fitted in a similar body 3, and a taper-4 is formed on the outer peripheral surface of the tip of the nose 2 to form a tapered tip. ing. On the other hand, the inner peripheral surface of the body 3 is formed a groove 5, the rubber-like elastic consisting body O- ring 6 and the backup ring 6 ₁ shea between both bodies 2 and 3 is mounted in the groove 5 - Le is doing. Then, grooves 7 and 8 are formed on the facing surfaces of the two bodies 2 and 3, respectively.
The annular ring 9 made of an elastic body is fitted in the air space formed by the both grooves. The annular ring 9 is usually an elastic ring made of metal, a part of which is cut away.

The groove 7 provided in the nose 2 is a groove having a trapezoidal cross section, and tapers 10 and 11 are formed in the front and rear thereof.
The taper 10 is for moving the annular ring 9 at the time of separation, and the one taper 11 is a surface for supporting the annular ring 9 during use under high pressure.

On the other hand, the groove 8 on the body 3 side, that is, the small diameter circumferential groove 1
2 and a large-diameter peripheral groove 13 are formed to form a two-step peripheral groove. Particularly, a taper is provided at the front end of the small-diameter peripheral groove 12 and in the middle between the small-diameter peripheral groove 12 and the large-diameter peripheral groove 13. 14 and 15 are formed. This taper 14 is the same as the taper 1 described above.
1, and plays a role of sandwiching and supporting the annular ring 9.
On the other hand, the taper 15 is for moving the annular ring 9 between the small-diameter peripheral groove 12 and the large-diameter peripheral groove 13, that is, for smoothing the expansion and contraction of the annular ring 9.

An annular pressing piece 16 is inserted into the gap between the nose 2 and the body 3 from the front of the body 3 and the tip 1 thereof is inserted.
7 faces the annular ring 9. The rear end 18 of the annular pressing piece 16 is in the form of a flange having a folded back end and is engaged with the inner step portion 20 of the annular cover 19.
The annular pressing piece 16 may be formed by cutting a cylindrical member, but it is preferable that the annular pressing piece 16 is formed by press working because of its excellent cost. The annular cover 19 is usually a synthetic resin, and for example, an injection molded product of polyacetal resin is adopted.

A spring 21 is fitted on the front end side of the outer peripheral surface of the body 3. Then, the spring 21 is covered by the annular cover 19, and the inwardly projecting peripheral portion 22 formed at the rear end of the annular cover 19 and the projecting peripheral portion 23 formed at the outer peripheral surface of the body 3 are engaged with each other. Fixed by. When the spring 21 is brought into contact with the inner side of the annular cover 19, elastic force is always applied toward the front of the body 3. Therefore, the annular cover 19 can be elastically slid rearward of the body 3 in the axial direction, and the annular pressing piece 16 is also axially moved together with the sliding.

On the outer peripheral surface of the annular cover 19, however, an annular recessed groove 24 is formed which opens toward the front end side, that is, the insertion side of the nose 2, and the annular recessed groove 24 is formed. Ribs 25 are provided at four locations around the periphery.
The annular recessed groove 24 serves as an insertion portion for the driver 40.

Next, the connection and separation of the two bodies will be described in more detail with reference to the drawings. First, when joining the two bodies,
By inserting the nose 2 in the F direction, the taper 4 formed at the tip of the nose 2 is inserted with the annular ring 9 expanded from the inside. That is, the annular ring 9 is the large diameter circumferential groove 1
3, the diameter is gradually increased, and the diameter is reduced to the initial diameter in the groove 7 having a trapezoidal cross section formed on the outer peripheral surface of the nose 2 and is accommodated.

When the nose 2 is fitted in the F direction, the driver 30 abuts and presses the tip of the driver 30 against the annular protrusion 1 so that the work space is extremely narrow. Easier to join in place.

Next, at the time of separation, the nose 2 is further pushed in the direction F, whereby the nose 2 is brought into contact with the annular cover 19 and the annular cover 19 is pushed, and the annular cover 19 is integrated with the annular cover 19. The annular pressing piece 16 thus expanded is expanded in the large-diameter circumferential groove 13 to prevent the diameter from being reduced. At this time, in order to further push the nose 2 in the F direction, the annular protrusion 1 can be easily pushed by the driver 30.

In this state, while supporting the annular cover 19 by another driver 40, that is, the annular pressing piece 16
While supporting the annular ring 9 at the tip 17 of the
By pulling out in the opposite direction, it is possible to easily separate the two.

Of course, by removing the driver 40 holding the annular cover 19 from this state, the spring 2
By the elasticity of No. 1, the annular pressing piece 16 is returned to the initial position, the relationship between the annular ring 9 and the tip 17 of the annular pressing piece 16 is broken, and the annular ring 9 returns to the initial diameter.

In the movement of the nose 1 in the F direction, it is also true that the annular cover 19 can be pushed and moved in the F direction by the driver 40 using the annular recessed groove 24. , Even in a narrow work space where the annular cover 19 cannot be directly operated by a finger, it is possible to easily separate the two.
Together with the fact that the nose 2 need only be fitted into the body 3 at the time of connection, the connection and separation of the two are extremely simple.

Of course, the nose structure of the present invention can be applied to other pipe joints as well, and as shown in FIG.
It goes without saying that the structure of the present invention can also be applied to the nose of a le lock type pipe joint.

[0028]

As described above, according to the present invention, not only the coupling as a pipe joint, but also the separation is easy, and the coupling / separation of the pipe joint can be easily performed even in a narrow working space. The restrictions have been lifted.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a conventional ball lock type pipe joint.

FIG. 2 is a partially cutaway side view showing a previously proposed pipe joint.

FIG. 3 is a side view, partly in section, of a nose for a pipe joint of the present invention having a structure that can be used for the pipe joint of FIG.

FIG. 4 is a sectional view taken along the line AA of the pipe joint nose of FIG.

5 is an exploded view of the pipe joint nose of FIG. 4. FIG.

FIG. 6 is a plan view of the annular protrusion of the tube joint nose of the present invention.

FIG. 7 is a plan view of a retaining ring.

FIG. 8 is a side view showing another example of the pipe joint nose of the present invention.

9 is a front view of the pipe joint nose of FIG. 8. FIG.

10 is a cross-sectional view of the main part of the pipe joint nose of FIG.

FIG. 11 is a partially cut sectional view of a pipe joint when the nose shown in FIG. 3 is connected to a body.

[Explanation of symbols]

1 ‥‥ fitting, 2 ‥‥ male body (Roh -'s), 2 ₁ ‥‥ male body of the substrate, 2 the tip portion of the ₂ ‥‥ male body (the fitting portion), 2 ₃ ‥‥ stepped portion of the male body , 2 ₄ ... peripheral groove of male body, 3 ... female body (body), 4 ... taper on outer peripheral surface of male body, 5 ... groove on inner peripheral surface of female body, 6 ... O-ring, 6 ₁ ... backup ring, 7 ... trapezoidal groove, 8 ... two-step circumferential groove, 9 ... annular ring, 10, 11 ... trapezoidal groove taper, 12 ... small diameter circumferential groove , 13 ... large-diameter circumferential groove, 14, 15 ... two-step circumferential groove taper, 16 ... annular pressing piece, 17 ... tip of annular pressing piece, 18 ... rear end of annular pressing piece, 19 ... Annular cover, 20 ... Inner step, 21 ... Spring, 22 ... Projection of inner peripheral surface, 23 ... Projection formed on outer peripheral surface of body, 24 ... Annular groove , 25 ... ribs, 30, 40 ... Driver, 41 ... pressing protrusion 41 ₁ ... pressing protrusion flange, 41 ₂ ... pressing protrusion inner diameter, 42 ... C-shaped retaining ring 51 ... hose, 52 ... Male body (nose), 53, female body, 54, collar, 55, O-ring, 56, color spring, 57, retaining ring, 58, steel ball, 61, male body (Nose), 62, female body, 63, 64, groove, 65, annular elastic ring, 66, annular cover, 67, annular pressing piece, 68, spring, 69.・ ・ ・ Tsubabe.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-25639 (JP, A) Actually opened 60-101284 (JP, U) Actually opened 55-132490 (JP, U) Actually opened 59- 183949 (JP, U) Actual public Hei 3-15907 (JP, Y2) Actual public Sho 63-4873 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 37/22

Claims (8)

(57) [Claims] 1. A male body in a pipe joint in which a male body is fitted into a female body and coupled, and the male body is moved to the tip side to push an annular cover of the female body so that these can be separated from each other. There is a pressing protrusion for moving the male body to the tip side on the outer peripheral surface close to the male fitting part, and a flange is provided on the outer periphery of the pressing protrusion in the direction opposite to the male body tip. A structure of a male body for pipe joints that can be joined and separated, characterized by being formed. 2. The structure of the male body for a pipe joint according to claim 1, wherein a pressing protrusion is welded to the outer peripheral surface of the male body. 3. The structure of the male body for a pipe joint according to claim 1, wherein a step portion is formed on the outer peripheral surface of the male body, and the pressing protrusion is fitted in the step portion. 4. The structure of the male body for a pipe joint according to claim 1, wherein a step portion is formed on the outer peripheral surface of the male body, and the pressing protrusion and the retaining ring are fitted in the step portion. 5. The steps of claim 3, wherein the base of the male body has a large diameter and the portion to be fitted into the female body has a small diameter to form the step portion.
The structure of the male body for pipe fittings according to the item. 6. The pipe joint according to claim 3, wherein a projection that is continuous or discontinuous in the circumferential direction is formed on the outer peripheral surface of the male body to define a stepped portion that is separated from the fitted portion. The structure of the male body. 7. The pressing protrusion is an annular protrusion.
The structure of the male body for pipe fittings according to the item. 8. The structure of the male body for a pipe joint according to claim 1, wherein the plane of the pressing protrusion and the axis of the male body are orthogonal to each other.