JP2642897B2 - Rapid Pipe 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 pipe joint, and more particularly to a rapid pipe joint capable of connecting pipes quickly.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional pipe joint comprises two eccentrically rotatable cam levers for fixing a connecting head 2 on an outer peripheral surface of a hollow connecting body 1 to which the connecting head 2 is fitted. 3 are provided at opposing positions on the diameter. In this pipe joint, since the cam lever 3 is not provided with a latch member, the cam lever 3 to which the connecting head 2 should have been fixed often returns easily upward by external force and turns to loosen the connecting head 2. Problems arise. Therefore, as shown in FIG. 9, there has appeared a cam lever 3 which is locked by a locking ring 4 so that it cannot return and rotate. However, this joint also requires that the locking ring 4 be moved by hand when locking or unlocking the cam lever 3, which is inconvenient to operate and, at the same time, the cam lever 3 is provided bare. Therefore, it is likely to be deformed and damaged by the impact of another object.

[0003] For this reason, a kind of high-speed pipe joint has recently been seen, and one example thereof is Japanese Utility Model Application No. 5-31163 filed by the present applicant (ID No. 593111064) shown in FIG. This means that a cam lever 7 is pivotally supported by a bracket on each of opposite sides of the outer peripheral surface of the connecting body 5 with a bracket, and a lock seat 6 having an axially downward locking hole 6a at an intermediate portion of the lower portion of the bracket is provided. The cam lever 7 is provided with a lock pin 7a which is always urged upward by a spring 7b at an appropriate portion thereof, and a knob for rotating the cam lever 7 at the end of the lock pin 7a. A retaining ring 7c is attached. When the locking ring 7c is pulled downward, the lock pin 7a, which is inserted into the locking hole 6a and restricts the rotation of the cam lever 7, is separated from the locking hole 6a against the spring 7b. ing.

[0004]

In the pipe joint shown in FIG. 10, when the cam lever 7 is rotated so as to be close to the connecting main body 5 and the lock pin 7a is inserted into the locking hole 6a, the cam lever 7 is inserted. When the vicinity of the connecting body 5 receives an impact during use, the lock pin 7a and the locking hole 6a may be deformed or damaged by the impact since the vicinity where the lock pin 7a is provided is exposed to the outside. There is. Further, a connecting head (not shown) is inserted into the connecting main body 5 and the cam lever 7 is inserted.
During the rotation of the lock ring 7c, the lock pin 7a is held in a tensioned state by the lock ring 7c from the beginning, and after reaching the position corresponding to the lock hole 6a, the hand of the lock ring 7c can be released. In addition, since the same operation must be repeated on the opposite side, the operation is very troublesome.

The present invention has been made in view of the above-mentioned problems in the conventional pipe joint, and when the cam lever is rotated to an appropriate position, the connecting head is firmly held, and the cam lever is fixed by a lock pin. Of the lock pin and the slope of the upper end of the lock pin abuts against the arcuate surface of the lock seat and moves smoothly with the rotation of the cam lever. It is an object of the present invention to provide a slidable rapid pipe joint.

[0006]

In order to achieve the above object, according to the present invention, there is provided a connecting body in which a connecting seat for inserting the other end of a connecting head connected to a pipe is formed. Locking seats each having a fixing hole are provided protruding near the cam lever mounting locations on both sides facing each other in diameter, and a holding cylinder is provided on the inner surface of the cam lever facing the connecting body, and a lock pin is provided on the holding cylinder. When the convex pin at the upper end of the lock pin is inserted into the fixing hole, the protruding cam portion provided at the cam lever pivotal contact end enters the bearing seat to tighten and hold the connecting head. In the pipe joint formed as described above, a positioning block raised to a predetermined height is provided at a lower end edge of each lock seat on the outer peripheral surface of the contact seat, and on both sides of the lock seat, the entire side surface of the lock seat and the positioning block are respectively provided. Shield to lower side If a protection plate is formed and the holding cylinder of the cam lever is provided with a predetermined thickness, and the cam lever is rotated to bring the holding cylinder into contact with the side surface of the positioning block, the upper end of the lock pin becomes convex. The column is configured so that it can be accurately inserted into the fixing hole of the lock seat.

[0007] An inclined surface is formed at the upper end of the convex pillar of the lock pin, and an arc surface on which the inclined surface can smoothly contact and move is formed on the surface of the lock seat corresponding to the inclined surface. The direction of movement is restricted, or a stop end of a predetermined length is extended at the lower end of the cam lever so that a predetermined distance is maintained between the stop end and the center line of the lock pin, and A lower end of the lock pin extending downward from the bottom surface of the holding cylinder is formed at a distal end provided with a deflected plane orthogonal to the restraining end, and a laterally long oval hole is formed in the distal end. At the same time, a ring-shaped pulling ring in which a flexible wire is wound tightly and with a predetermined diameter is hung on the oblong hole, and the circular surface of the pulling ring and the surface of the restricting end are spaced at a predetermined distance. So that the pull ring is pulled in a direction parallel to the stop end. However, a large amount of self-rotation around the axis of the lock pin is restrained by the restraining end, so that the slope at the upper end of the lock pin can always be smoothly contacted with the arc surface of the lock seat. It becomes even more preferable.

[0008]

According to the present invention having the above-described structure, the other end of the connecting head having one end connected to the pipe is fitted into the hollow inside of the connecting body, and when the cam lever is rotated to a predetermined position, the cam lever is rotated. The projecting edge of the protruding cam portion enters into the peripheral wall of the bearing seat of the connecting body, and can hold the connecting head from both sides. The pull ring attached to the lower end of the lock pin can be pulled and moved in the direction parallel to the stop end, but the width of the uneven plane of the lower end of the lock pin with respect to the distance between the lock pin and the side surface of the stop end, and the pull ring itself. Due to restrictions such as the outer diameter of the lock pin, it is not possible to make a large self-rotation around the axis of the lock pin, that is, the lock pin cannot also make a large self-rotation. It can be held movably in contact with the smooth state. In addition, since the protection plate is provided so as to cover the entire side surface of the lock seat and the side surface of the positioning block, and the cam lever shields both side surfaces of the holding cylinder when the connecting head is fixed, the lock pin axially inserted into the holding cylinder. Can be protected from external impact.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a rapid pipe joint according to the present invention is mainly constructed by combining a connecting body 20, a connecting head 30, both cam levers 40, and fixing means 50.

The connecting body 20 is provided at its one end with a contact seat 21 having a predetermined inner diameter, and on a peripheral wall of the contact seat 21 is formed a through groove 22 having a predetermined width that is diametrically opposed to each other. Protrusions 23 are provided on both sides of the groove 22 at predetermined intervals. Further, a lock seat 24 having a fixing hole 25 formed in a vertical direction is provided on a lower side between the two convex ears 23, and a circular arc surface 241 inclined obliquely inward at a lower end of an outer surface of the lock seat 24. In addition, a positioning block 26 is provided on the lower edge of the lock seat 24 and protrudes to a predetermined height and extends along the circumference of the outer peripheral surface of the contact seat 21.

As shown in FIGS. 2 and 3, the positioning block 2 in the cross section of the positioning block 26 is used.
A predetermined distance L ₁ is provided between an imaginary line extending downward from the lower end edge of the base 6 substantially parallel to the peripheral surface of the bearing seat 21 and the center line of the fixing hole 25. Protective plates 27 are provided on both sides of the lock seat 24, and the protective plate 27 is provided to project outward from the peripheral surface of the contact seat 21 so as to be higher than the top end surface of the lock seat 24 by a predetermined dimension. 24 and the lower end of the positioning block 26.

As shown in FIG. 1, the connecting head 30 has an annular shape and is axially fitted in the bearing seat 21 and has a circumferential surface corresponding to the two through grooves 22 of the connecting body 20 on the outer peripheral surface thereof. The annular neck portion 31 is recessed at a predetermined arc degree, and a screw 32 is engraved on its outer peripheral surface to form a pipe (or
(Hose connection fitting). This belongs to the prior art, and will not be discussed here.

The cam lever 40 is provided with a protruding cam portion 41 at one end corresponding to each of the through grooves 22, and the biconvex portion is positioned so that the protruding cam portion 41 is positioned within the through groove 22 of the contact seat 21. A holding cylinder 4 of a predetermined length, which is pivotally connected between the ears 23 and has a through hole at a middle portion of the side surface facing the connecting body 20.
2 is protruded, and a hollow space 43 is formed in one end face of the holding cylinder 42.
And extending downward from the holding cylinder 42 of the cam lever 40 to form a stopping end 44 having a predetermined length, and the lower part of the holding cylinder 42 from which the stopping end 44 extends becomes an open space.

The fixing means 50 is shown in FIGS.
As shown in FIG.
And a body thereof is formed on a lock pin 51 having a predetermined diameter, a ring-shaped neck portion 51a is protruded around the upper end of the lock pin 51, and the lower end of the lock pin 51 has a wide flat shape with a predetermined width. At the end 512 of the
12 is formed so as to be substantially perpendicular to the restraining end portion 44, and a horizontally long elliptical hole 513 is formed in the flat surface to extend from the upper end surface of the holding cylinder 42 to the upper end of the lock pin 51. The convex column 514 is extended, and an inclined surface 515 corresponding to the arc surface 241 of the lock seat 24 is formed on the upper end surface of the convex column 514.
Is formed. A spring 52 is provided around the circumference of the lock pin 51 so that one end of the spring 52 is in contact with the ring-shaped neck portion 51a, and a locking ring 53 is provided around the lock pin 51 below the spring 52 to form the recess space. 43, a flexible wire is wound closely to a predetermined diameter to form a ring-shaped pull ring 54, which is hooked on the oblong hole 513.

When assembling, first, the lock pin 51 is inserted into the holding cylinder 42, the spring 52 and the locking ring 53 are loosely fitted around the lock pin 51, and the locking ring 5
The lock pin 51 is fitted to the inner lower peripheral wall of the holding cylinder 42 by press-fitting and fixed to a rivet joint, and the lock pin 51 is pivotally mounted so as to be able to slide in and out of the locking ring 53. Thereafter, the lower end of the lock pin 51 is pressed to form the stop end 44.
End part 51 having a wide uneven plane whose direction is almost orthogonal to
2, and a laterally long elliptical hole 513 is formed in the distal end portion 512 so that a pull ring 54 formed by tightly winding a flexible wire into a predetermined diameter is engaged therewith.

As shown in FIGS. 1, 3 and 4, the hanging circular surface of the pull ring 54 and the side surface of the restraining end 44 are maintained at an appropriate interval substantially parallel to each other. Can be pulled in a direction parallel to the stop end 44 while the pull ring 54 is
Even if the rotation of the pull ring 54 is relatively large and the distance between the ring and the side surface of the stop end 44 is small, the rotation of the pull ring 54 is restricted by the stop end 46. Therefore, the lock pin 51 connected to the pull ring 54 cannot self-rotate significantly in the holding cylinder 42, and the lock pin 51 cannot be rotated. Appropriately and stably, the slope 515 of the convex column 514 at the upper end is regulated so as not to deviate from a predetermined direction, that is, the slope 515 can always always appropriately correspond to the arc surface 241 of the lock seat 24. .

Subsequently, as shown in FIG.
Of the projecting cam portion 41 between the two convex ears 23 of the seat 21
2, the double-hook 23 and the protruding cam portion 41 are axially inserted by a pin, so that the protruding cam portion 41 can eccentrically rotate the pin around the axis. When the cam lever 40 is eccentrically rotated so as to come into contact with the peripheral wall of the connecting body 20, the relatively protruding arc peripheral edge of the protruding cam portion 41 enters the receiving seat 21 through the through groove 22, and the annular neck portion is formed. The engaging head 31 is engaged with the connecting head 30 so that the connecting head 30 can be fixed.

When it is desired to hold down the connecting head 30 by pushing down the cam lever 40 of the present invention, as shown in FIGS. 5 and 6, the user directly pushes down the cam lever 40, Utilizing the fact that the slope 515 and the arc surface 241 of the lock seat 24 correspond to each other, the convex column 514 is used.
The inclined surface 515 of the lock seat 24 is securely inclined.
When the cam lever 40 is gradually depressed in a state in which the convex portion 514 is in contact with the inclined surface 515 and the arc surface 241 is properly contacted, the pressing force of the lock column 24 against the convex column 514 is further increased. An appropriate downward acting force along the axis is generated on the slope 515, and the lock pin 51 is moved downward by receiving the downward acting force along the axis, and the elastic return force is stored in the spring 52 from the downward movement of the lock pin 51. At the same time, the slope 515 at the upper end of the convex column 514 smoothly moves while abutting against the arc surface 241 of the lock seat 24 to form an action of moving the lock pin 51 in the axial direction with an appropriate force.

When the cam lever 40 further rotates downward continuously, the lock pin 51 moves downward to continuously compress the spring 52 with the holding cylinder 42, and the convex column 514 also gradually sinks into the holding cylinder 42. The cam lever 40 further downwardly rotates downward until the slope 515 of the convex column 514 moves to the lower end surface of the circular arc surface 241, and the upper end of the convex column 514 gradually becomes the fixing hole. 25, the spring 52 pushes up the lock pin 51 by the action of the stored elastic return force, and the convex column 51
The upper end of 4 protrudes and is inserted into the fixing hole 25 to be engaged and fixed.

At this time, the holding cylinder 42 of the cam lever 40
The upper end of the side face facing the connecting body 20 is a positioning block.
Contacting the side surface of the lock 26, and
The distance between the sides of the positioning block 26 is L_TwoBecomes
Further, as described above, the center line and the position of the fixing hole 25 of the seat 21 are determined.
The distance between the sides of the positioning block 26 is L₁Being
Therefore, the present invention makes it easy to penetrate the holding cylinder 42 during processing.
Insertion hole center line (that is, the axis of the lock pin inserted through the holding cylinder)
Line) and the distance L between the side surfaces of the positioning block 26 _Twoas well as
Center line of fixing hole 25 of contact seat 21 and positioning block 2
6 distance L between sides₁Can be processed equally,
In other words, L₁And L_TwoAre precisely equalized by machining.
You can have.

As a result, the upper end of the holding cylinder 42 facing the connecting body 20 can be brought into contact with the side surface of the positioning block 26, so that the lock pin 51 is inserted into the holding cylinder 42 and the axis of the holding cylinder 42 is aligned with the axis thereof. The distance from the side surface of the positioning block 26 is equal to L ₁ , and the lock pin 51 can be accurately axially inserted into the fixing hole 25.

More importantly, since the holding cylinder 42 and the positioning block 26 are both rigid bodies, if the holding cylinder 42 of the cam lever 40 is fixed to the positioning block 26, it cannot be further compressed and approached. That is, L ₁ and L ₂ are always kept equal and the lock pin 51
The cam lever 40 of the present invention does not rotate excessively, and the lock pin 51 does not impact the peripheral surface of the fixing hole 25. The projection 514 and the fixing hole 25 are not deformed by the impact.

Further, the peripheral edge of the protection plate 27 is formed at a predetermined height from the top end surface of the lock seat 24, and
The protection plate 27 is provided on both sides of the holding cylinder 42 so as to cover the entire side surface of the positioning block 26 and the side surface of the positioning block 26, and shields the holding cylinder 42 and the convex pillar 514 of the lock pin 51 axially inserted into the holding cylinder 42. The convex column 514 is attached to the protection plate 2
7 can be prevented from being impacted by an object outside.

When the lock pin 51 inserted into the fixing hole 25 is detached from the fixing hole 25, the finger is hooked on the pull ring 54 as shown in FIG.
When the finger is outwardly pulled, the convex column 514 is disengaged from the fixing hole 25, and the cam lever 40 may be further turned upward. The wire ring of the ring 54 is concentrated at one end of the oblong hole 513, and the wire is flexible because the wire is flexible.
Is elastically deformed, the cam lever 40 is completely turned upward, and the hand is released from the pull ring 54. The wire rings of the pull ring 54 are arranged in contact with each other in the oblong hole 513 due to their elastic return, and The ring 54 naturally hangs down, making it easier for the user to hook.

[0025]

As described above, according to the present invention, when the cam lever is rotated to a predetermined position, the connecting head connected to the pipe is firmly held, and the cam lever is automatically fixed by the lock pin. At the same time, the protection pin prevents the impact from external force around the lock pin inserted into the fixing hole of the lock seat, thereby improving the service life.

[Brief description of the drawings]

FIG. 1 is an exploded view of a relatively preferred embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an assembled sectional view of an embodiment of the present invention.

FIG. 4 is a view of FIG. 3 viewed from below.

FIG. 5 is a diagram illustrating a contact state between a slope of a lock pin and an arc surface of a lock seat according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a state in which a convex pillar of a lock pin is inserted into a fixing hole of a lock seat in the embodiment of the present invention.

FIG. 7 is a view showing a state in which the pull ring in the embodiment of the present invention is hooked on the oblong hole of the lower end of the lock pin.

FIG. 8 is a longitudinal sectional view of a conventional pipe joint.

FIG. 9 is a view showing a state in which a cam lever in a conventional pipe joint is locked by a locking ring.

FIG. 10 is a three-dimensional exploded view showing a conventional rapid pipe joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Connection body 24 ... Lock seat 25 ... Fixing hole 26 ... Positioning block 27 ... Protective plate 30 ... Connection head 40 ... Cam lever 41 ... Projection cam 42 ... Holding cylinder 44 ... Stopping end 51 ... Lock pin 54 ... Pull ring 241 ... Arc surface 512 ... End part 513 ... Oval hole 514 ... Convex column 515 ... Slope

Claims (3)

(57) [Claims] 1. A connecting seat (21), into which the other end of a connecting head (30) connected to a pipe is fitted, is formed on a connecting body (20), and the connecting seat (21) has a diameter on an outer peripheral surface thereof. Locking seats (24) each having a fixing hole (25) are protruded in the vicinity of the opposite mounting position of the cam lever (40), and are provided on the inner surface of the cam lever (40) facing the connecting body (20). When the holding cylinder (42) is provided, the lock pin (51) is loosely inserted into the holding cylinder (42), and the convex column (514) at the upper end of the lock pin (51) is inserted into the fixing hole (25).
The cam portion (4) provided at the pivot end of the cam lever (40).
1) enters the seat (21) and the connecting head (3)
0), a positioning block (26) raised to a predetermined height is provided at the lower edge of each lock seat (24) on the outer peripheral surface of the contact seat (21). On both sides of the lock seat (24), the entire side surface of the lock seat (24) and the positioning block (2), respectively.
6) forming a protective plate (27) for shielding up to the lower side surface;
Further, a holding cylinder (42) of the cam lever (40) is provided with a predetermined thickness, and the cam lever (40) is rotated to bring the holding cylinder (42) into contact with the side surface of the positioning block (26). For example, the convex pin (514) at the upper end of the lock pin (51)
Is a high-speed pipe joint which can be accurately inserted into the fixing hole (25) of the lock seat (24). 2. The convex pin (51) of the lock pin (51).
4) A slope (515) is formed at the upper end, and the slope (51) is formed.
The slope (5) is provided on the surface of the lock seat (24) corresponding to (5).
2. The rapid pipe joint according to claim 1, wherein the lock pin is formed so that the lock pin is movable in the axial direction. 3. A stop end (44) having a predetermined length is extended from a lower end of the cam lever (40), and the stop end (44) is extended.
A predetermined distance is maintained between the lock pin (51) and the center line of the lock pin (51), and the holding cylinder (4) of the lock pin (51) is held.
2) The lower end extending downward from the bottom surface is the stop end (44).
End portion (512) provided with a plane that is orthogonal to
And a laterally elongated oval hole (513) is formed in the end portion (512), and a flexible wire rod is wound tightly around the elongated oval hole (513) to a predetermined diameter. The pull ring (54) is engaged so that the circular surface of the pull ring (54) and the surface of the stop end (44) are substantially parallel to each other at a predetermined interval. Is the stop end (4
Even if the lock pin (51) can be pulled and moved in a direction parallel to the direction (4), a large self-rotation around the axis of the lock pin (51) is restrained by the stop end (44), and the upper end of the lock pin (51) The slope (515) of the lock seat (24) is always the arc surface (2) of the lock seat (24).
41. The rapid pipe joint according to claim 1, wherein the rapid pipe joint is capable of abuttingly moving in a smooth state.