JPH09280450A - Hose coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a spring formed of a separately arranged member, and reduce assembly manhour and a cost by integrally arranging an elastic member to a claw member which exhibits the slipping off preventing function of a nipple by being brought into contact with a projection formed to the nipple, and applying the elastic force of this elastic member to a slide cover. SOLUTION: When a nipple 17 is inserted to a coupling main body, the projection 17 of the nipple 17 is brought into contact with the taper surface 12a side of an angle projected part 12, however, when the projection 17b gets over the angle projected part 12, the angle projected part 12 is recovered by the elastic force of an elastic part 11, and at this time, the taper surface 12b of the angle projected part 12 is matched to the taper surface 18b of an annular groove 18, thereby the nipple 17 is prevented from being slipped off. Also, when a slide cover (s) is moved against an elastic piece 14 from this condition, the pushing/pressing part 15 of the slide cover (s) and the projected part 12d are staggered, therefore the angle projected part 12 can escape from a projected hole 8. Therefore, when the nipple 17 is extracted, the angle projected part 12 is pushed up along the taper surface 18b, and the nipple 17 can be extracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint having a function of preventing a joint body and a nipple from coming off and easily separating them from each other as needed.

[0002]

2. Description of the Related Art As a hose joint of this kind, for example, Japanese Patent Publication No. 49-42094 and Japanese Patent Publication No. 63-2915.
The one described in Japanese Patent Publication No. 5 is conventionally known. Both of these are the same. Further, these conventional hose joints are provided with a pawl member provided on the joint body and a slide cover that presses the pawl member to prevent the nipple from coming off or separates from the pawl member to allow the nipple to come out. ing. Then, a spring is interposed between the joint body and the slide cover, and the spring force of the spring pushes the slide cover in the axial direction. That is, normally, the pressing portion provided on the slide cover presses the pawl member to prevent it from retracting, but by moving the slide cover against the spring force of the spring, the pressing portion and the pawl are stopped. The members disagree with each other so that the pawl member can be retracted.

When the pawl member is prevented from retreating, the pawl member firmly contacts the projection or recess formed on the nipple, so that the nipple cannot come off from the joint body. Further, if the nipple is forcibly pulled out from the joint body when the retraction of the pawl member is permitted, the pawl member retreats along the protrusion or the recess, so that the nipple can be pulled out. In any case, in this type of hose joint, the nipple is designed so as not to come off or easily come out.

[0004]

In the conventional hose joint as described above, the slide cover, the spring for exerting a spring force on the slide cover, and the pawl member for preventing the slide cover from retracting are provided. Since each of them is composed of a separate member, the number of parts increases. As the number of parts increases in this way,
Assembling man-hours also increase. Therefore, the conventional hose joint has a problem that the cost is inevitably high. An object of the present invention is to provide a hose joint in which the number of parts is reduced by integrally forming a pawl member and an elastic member that applies a force to a slide cover.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a joint body having a hose connected to one end side and an insertion cylinder into which the nipple is inserted at the other end side, a nipple inserted into the joint body, and a nipple insertion cylinder are provided. A claw member that protrudes in the direction of the nipple and exerts a retaining function of the nipple by hitting a stepped portion formed on the nipple, a slide cover that is axially movable on the outer circumference of the claw member, and is provided on the inner circumference of the slide cover, When the pressing portion is in contact with the pawl member, the pawl member is prevented from retracting to keep the nipple from coming off, and the pressing portion is separated from the pawl member. At this time, it is premised on a hose joint configured so that the pawl member can be elastically retracted to allow the nipple to be pulled out.

In the first aspect of the present invention, the elastic member is integrally provided on the pawl member, and the elastic force of the elastic member is applied to the slide cover so that the slide cover is provided. A feature is that the pressing force is applied to the slide cover in the direction of the position where the pressing portion contacts the pawl member. The second invention is characterized in that the elastic member formed integrally with the pawl member is constituted by an elastic piece.
The third invention is characterized in that the elastic member integrally formed with the pawl member is constituted by an elastic ring.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the first embodiment shown in FIGS. 1 to 7, a hose connecting cylinder 1 is formed at one end of a joint body h, and a lock nut 2 is put around the hose connecting cylinder 1. I have to. A sleeve 2a is provided in the lock nut 2, but a hose (not shown) is held between the sleeve 2a and the hose connecting tube 1. The large-diameter flange portion 3 and the small-diameter flange portion 4 are formed substantially at the center in the axial direction of the joint body h as described above. A nipple insertion cylinder 5 is formed on the opposite side of the hose connection cylinder 1 with the flanges 3 and 4 interposed therebetween. A large diameter portion 6 is formed at the end of the nipple insertion cylinder 5. There is.

A pair of guide pieces 7, 7 are formed on the outer periphery of the nipple insertion cylinder 5 in parallel with the axial direction. The pair of guide pieces 7, 7 configured in this manner is used for the nipple insertion tube 5
4 sets are formed by shifting the phase by 90 degrees in the circumferential direction.
One end of each of the guide pieces 7, 7 configured as described above is made to coincide with the large diameter portion 6 side, and the other end is kept spaced from the small diameter flange portion 4. A protruding hole 8 is formed between the pair of guide pieces 7, 7, and the protruding hole 8 is formed.
3 has a narrow axial direction and a wide circumferential direction, as shown in FIG. Further, the edges of the projecting hole 8 facing each other in the axial direction are tapered surfaces 8a and 8b. These tapered surfaces 8a, 8b
Makes the distance between them narrower toward the inside.

At a position facing the protruding hole 8 in the axial direction,
Moreover, a positioning recess 9 is formed at a position adjacent to the small-diameter flange portion 4. The seating portion 10 of the pawl member n shown in FIG. 6 is fitted into the concave portion 9, and the shape of the pawl member n is as follows. That is, the seat 10
The elastic portion 11 continuous with the elastic portion 11 is formed, and the chevron convex portion 12 is formed at the tip of the elastic portion 11. The tapered surfaces 12a and 12b of the chevron-shaped projection 12 maintain the same angle as the tapered surfaces 8a and 8b of the projecting hole 8. And
When the tapered surfaces 12a and 12b of the chevron convex portion 12 are exactly aligned with the tapered surfaces 8a and 8b of the projecting hole 8, the top portion 12c of the chevron projecting portion 12 is inserted into the nipple insertion tube 5 through the projecting hole 8. It is designed to project. Further, the protrusion 12d is formed on the mountain-shaped convex portion 12 on the side opposite to the top portion 12c.

In the pawl member n as described above, the standing piece 13 is formed at the end of the seat 10 at a right angle to the seat 10. Moreover, this standing piece 13
As shown in FIG. 6, an elastic piece 14, which is an elastic member of the present invention, is connected to this. The elastic piece 14 is formed along the circumferential direction of the nipple insertion cylinder 5, and the radius of curvature of the lower side 14a thereof is made equal to the radius of curvature of the outer circumference of the nipple insertion cylinder 5. Moreover, as shown in FIG. 6, the tip of the elastic piece 14 is biased to the left side so that the initial load can be maintained against the force in the direction of the arrow 25.
By mounting the seating portion 10 in the recessed portion 9, the standing piece 13 is brought into close contact with the small-diameter flange portion 4. This is done so that the pawl member n will not be twisted even if the elastic piece 14 keeps the initial load.

By fitting the seating portion 10 of the pawl member n into the positioning concave portion 9, the chevron-shaped convex portion 1 is formed.
2 is located between the pair of guide pieces 7, 7 and faces the projecting hole 8 so that the top portion 12c thereof projects from the projecting hole 8. In this way, the top portion 12c is projected from the projecting hole 8 so that both tapered surfaces 8a and 8b and 12a and 12b thereof are formed.
As shown in FIG. 4, the elastic portions 11 are slightly bent to exert an elastic force in a state where and are in close agreement.

After the pawl member n is set on the outer circumference of the nipple insertion cylinder 5 as described above, the cylindrical slide cover s is covered on the outer side thereof. Slide covers like this
Is slidable along the guide pieces 7, 7. The pressing portion 15 is provided on the inner circumference of the slide cover s.
4 are formed by shifting the phase by 90 degrees in the circumferential direction, and the respective pressing portions 15 are slidably fitted between the pair of guide pieces 7, 7. A step portion 16 is formed in the slide cover s on the side opposite to the pressing portion 15, and the tip of the elastic piece 14 of the pawl member n is brought into contact with the step portion 16. In this way, the tip of the elastic piece 14 is connected to the step 16
In the state of being brought into contact with the elastic piece 14, an initial load for pushing the slide cover s leftward in the drawing is generated on the elastic piece 14.

The nipple 17 is inserted into the joint body h as described above. The tip insertion portion 1 of the nipple 17 is inserted.
An annular groove 18 is formed in 7a, as shown in FIG. One wall surface of the annular groove 18, that is, the wall surface rearward in the insertion direction is a tapered surface 18a. Further, a taper surface 18b is also formed on the wall surface on the side opposite to the one wall surface, and the taper surface 18b is made equal to the inclination angle of the taper surface 12b of the chevron convex portion 12. In the figure, reference numeral 19 is a seal attached to the tip of the insertion portion 17a,
Reference numeral 0 is a taper surface formed at the tip of this seal. Further, the tapered surface 18a hits the step portion 22 formed on the insertion port 21 side of the joint body h, and the nipple 17
Is for positioning in the insertion direction of.

Next, the operation of the first embodiment will be described.
When the nipple 17 is not inserted in the joint body h, and when no external force is applied to the slide cover s, the slide cover s maintains the normal position shown in FIG. 3 by the spring force of the elastic piece 14. . In this normal position, the pressing portion 15 and the protruding portion 12 of the pawl member n are
matches d. When the nipple 17 is forcibly inserted from the above state, the protrusion 17b of the nipple 17 comes into contact with the one tapered surface 12a side of the mountain-shaped protrusion 12. However, at this time, since the chevron-shaped convex portion 12 is pressed by the pressing portion 15, it cannot be retracted. Therefore, as shown in FIG. 7, the mountain-shaped convex portion 12 rotates counterclockwise in the drawing while bending the elastic portion 11 with the corner portion of the protrusion 12d as a fulcrum.

When the protrusion 17b of the nipple 17 gets over the chevron protrusion 12, the chevron protrusion 12 is
The normal state is restored by the elastic force of the elastic portion 11.
In this normal state, the tapered surface 1 of the chevron convex portion 12 is formed.
2b closely matches the tapered surface 18b of the annular groove 18. In the above state, even if a force in the pulling direction is applied to the nipple 17, the mountain-shaped convex portion 12 is prevented from retreating by the pressing portion 15 and the tapered surface 8a of the projecting hole 8, so that the joint main body h
The nipple 17 does not come off from the. If the slide cover s is moved against the elastic force of the elastic piece 14 from the above state, the pressing portion 15 of the slide cover s and the protruding portion 12d of the chevron convex portion 12 disagree with each other. Can be retracted from the projecting hole 8. Therefore, if the nipple 17 is forcibly pulled out, the chevron-shaped protrusion 12 is pushed up along the tapered surface 18 b of the annular groove 18. If the chevron convex portion 12 retreats in this way, the nipple 17 can be easily pulled out.

Incidentally, one taper surface 12 of the mountain-shaped convex portion 12
The thickness on the a side is made thicker than the thickness on the other tapered surface 12b side for the following reason. That is, when a force in the pulling direction is applied to the nipple 17 with the nipple 17 fitted, as shown in FIG.
Loads in three directions act. Therefore, the thickness on the taper surface 12a side, which is the side on which the load acts, is made thick to maintain the strength.

The pressing portion 15 of the slide cover s is
It is located between the guide pieces 7, 7 of the joint body h, and functions to prevent the slide cover s from rotating and to smoothly move the slide cover s in the axial direction. First as above
According to the embodiment, in order to apply the elastic force to the slide cover s, there is no need for a spring or the like made of another member as in the conventional case. That is, in this first embodiment, the pawl member n
Since the elastic piece 14 and the elastic piece 14 are integrally formed, the number of parts can be reduced, and the number of assembling steps can be reduced accordingly, which contributes to cost reduction.

In the second embodiment shown in FIG. 8, the elastic member of the present invention is composed of an elastic ring 24. That is, the elastic ring 24 is integrally provided on the upright piece 13 of the pawl member n, and the elastic ring 24 is interposed between the small diameter flange portion 4 and the step portion 16 of the slide cover s. . Since the configuration other than the above is the same as that of the first embodiment, its details are omitted. However, in the case of the second embodiment, there is an advantage that the acting force on the slide cover s acts accurately in the axial direction.

[0019]

As described above, according to the hose joint of the present invention, in order to apply the elastic force to the slide cover, it is not necessary to use a spring as a separate member as in the prior art. That is, since the pawl member and the elastic member are integrally formed, the number of parts can be reduced, and the cost can be reduced including the reduction in the number of assembling steps.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a perspective view of a joint body.

FIG. 3 is a cross-sectional view of a joint body.

FIG. 4 is a cross-sectional view showing a state where a nipple is inserted in the joint body.

FIG. 5 is an enlarged perspective view of a main part.

FIG. 6 is a perspective view of a pawl member.

FIG. 7 is a partial explanatory view showing a process of inserting a nipple.

FIG. 8 is a perspective view of a pawl member of the second embodiment.

[Explanation of symbols]

 h Joint body 5 Nipple insertion tube n Pawl member 14 Elastic piece that is an elastic member s Slide cover 15 Pressing part 17 Nipple 17b Projection part 24 Elastic ring

Claims (3)

[Claims] 1. A joint main body having a hose connected to one end side and an insertion cylinder into which the nipple is inserted at the other end side, a nipple inserted into the joint main body, and a nipple that protrudes into the nipple insertion cylinder and is attached to the nipple. A pawl member that exerts a function of preventing the nipple from coming off by hitting the formed projection, a slide cover that is movable in the axial direction on the outer circumference of the pawl member, and a slide cover that is provided on the inner circumference of the slide cover and contacts or separates from the pawl member. When the pressing part is in contact with the pawl member, the pawl member is prevented from retracting to keep the nipple from coming off, and when the pressing part is separated from the pawl member, the pawl member is elastic. In the hose joint configured to be retractable to allow the nipple to be pulled out, the pawl member is integrally provided with an elastic member, and the elastic force of the elastic member is applied to the slide cap. A hose joint configured to act on a bar and to apply a force to the slide cover in a position direction in which a pressing portion provided on the slide cover contacts the pawl member. 2. The hose joint according to claim 1, wherein the elastic member formed integrally with the pawl member is composed of an elastic piece. 3. The hose joint according to claim 1, wherein the elastic member formed integrally with the pawl member is constituted by an elastic ring.