JP3440689B2 - Pipe connection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a first tubular body and a second tubular body.
The present invention relates to a tubular body connection structure for connecting to a tubular body.

[0002]

2. Description of the Related Art Conventionally, in this type of pipe connecting structure,
The second tubular body is connected to the second tubular body through a connector, and the first tubular body is watertightly fixed at its end and the second tubular body is inserted into the connector. At this time, the connector prevents the inserted second tubular body from being pulled out in the axial direction, and
Watertightness is maintained at the outer circumference of the second pipe body by a ring or the like.

A specific configuration will be described as an example, with reference to FIG.
As shown in 0, the connector 10 has a first tubular body 14 watertightly fixed to the bamboo mouth 12 at one end thereof by a fastener not shown. In addition, the storage hole 1 of the connector 10
A second tubular body 18 is inserted in 6 and the second tubular body 18 is inserted.
The tubular body 18 is sealed by O-rings 20 and 22 embedded in the inner peripheral wall of the housing hole 16. Moreover, in the end-portion storage hole 24 of the connector 10, there is housed a tubular body removal stopper 26 having a bowl-like bottom shape and the peripheral wall of which is slit at an equal pitch. By engaging the expansion collar portion 28 provided on the pipe body 18, the second pipe body 18
Is being prevented. In addition, in general, the connector 1
0 is a resin with excellent mechanical strength (eg polyamide)
The first tubular body 14 is made of a resin (polyamide or the like) or rubber (ethylene / propylene / diene copolymer (EPDM) or the like) having a certain degree of flexibility, and the second tubular body 18 is a connector. Inserting into 10, expansion collar 2
It is formed of metal (iron, stainless steel, etc.) because the formation and strength of 8 are required. However, it goes without saying that the first tube body 14 may be made of metal.

[0004]

In such a tubular body connecting structure, the first tubular body 14 and the second tubular body 18 are connected by one operation of inserting the second tubular body 18 into the connector 10. Because it can be used, it is used for connecting pipes in various places. However, the rotation operation of the second tubular body 18 centering on the straight pipe path of the second tubular body 18 in the range inserted into the connector 10 is not restricted by the connector 10. Therefore, there is a possibility that the second tubular body 18 may rotate relative to the first tubular body 14, and thus the connector 10. For example, when the first pipe body 14 and the second pipe body 18 are fixed to a predetermined fixing structure after the first pipe body 14 and the second pipe body 18 are connected, these pipe bodies There is a case in which the second tube body 18 is relatively rotated as described above when it is fixed to the fixed structure. Further, even when both pipes are connected by the connector 10 after the pipes are fixed to the fixed structure, if any of the pipes moves following the unexpected movement of the fixed object, The second tubular body 18 may relatively rotate as described above. And
When the second tubular body 18 relatively rotates in this way,
O-rings 20, 2 in contact with the outer circumference of the second tubular body 18
2 causes wear or settling, which deteriorates the sealing property.

The present invention has been made to solve the above problems, and prevents relative rotation of both pipes when the first pipe and the second pipe are connected via a connector. The purpose is to do.

[0006]

[Means for Solving the Problem and Its Action / Effect] In order to solve such a problem, the pipe connecting structure of the present invention is a pipe connecting structure for connecting a first pipe and a second pipe. And the second pipe is watertightly fixed to the end of the first pipe body.
And a sealing means for contacting the outer circumference of the second pipe body to keep the pipe body watertight. a connector having, fixed to the connector, and a connector fixing member having an arm portion extending on a side of the second tube, said first
2 tubes are in the range plugged into the connector
It deviates from the extension of the trajectory of the straight pipe path of the second pipe body.
The curved path, the arm portion is
The second tubular body has an engaging portion that engages with the tubular path portion of the curved locus .

In the tubular body connecting structure of the present invention having the above-mentioned structure, when the second tubular body is inserted into the connector which is watertightly fixed to the end portion of the first tubular body, the second tubular body is The retaining means prevents the retaining mechanism in the axial direction, and the sealing means keeps it watertight. Therefore, the first and second pipe bodies are connected with the connector interposed.

On the other hand, in the pipe body connecting structure of the present invention, the arm portion of the connector fixing body fixed to the connector extends to the second pipe body side from the connector, and the engaging portion of this arm portion. Is
At a position deviated from the extension of the trajectory of the straight line of the second pipe in the area plugged into the connector, a second tubular body Bay
Engages with a curved conduit . Therefore, even if a force that relatively rotates one of the first and second pipe bodies about the locus of the straight pipeline acts, the position at a position deviated from the extension of the straight trajectory the engagement of the second tube, the second
The tube body of this does not rotate under the force against this force . Moreover, such an engagement has a pipe line portion with a curved locus.
Since it is done by the second tube body itself, which requires a special member
However, it is advantageous in terms of cost.

[0009]

Other Embodiments of the Invention The present invention can also adopt the following other embodiments. In the first embodiment, the connector fixing body is a connector mounting recess that follows the external shape of the connector. Have.

In the first aspect, since the connector fixing body can be retrofitted so that the connector fits into the connector mounting recess, the existing pipe body in which the first and second pipe bodies are connected via the connector is provided. The connection structure can be easily modified to one in which relative rotation of the tube does not occur.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a pipe connecting structure according to the present invention will be described based on Examples. Figure 1
It is a schematic exploded perspective view of a pipe connection structure of an example. In addition,
In the following description, the same members as those in the above-described conventional pipe connection structure will be designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the tubular body connecting structure of the first embodiment connects the first tubular body 14 and the second tubular body 18 with the connector 10 interposed therebetween. Further, in addition to the first tube body 14, the second tube body 18, and the connector 10, there is a clip 30 to be attached and fixed to the connector later.

The clip 30 includes a flat upper plate 32, a pair of opposed plates 34 protruding downward from both side surfaces thereof, and a clip arm portion 36 provided downward at the center of one end side in the longitudinal direction thereof. Have. The center of the other end of the upper plate 32 in the longitudinal direction is a notch 38 having a width slightly wider than the outer diameter of the second tubular body 18. Further, the facing interval of the facing plate 34 is slightly narrower than the width dimension of the width across flats 11 formed on the outer periphery of the connector 10. Further, the effective diameter of the clip arm portion 36 is slightly smaller than the outer diameter of the small diameter portion 13 formed on the first tube body 14 side of the connector 10. The clip 30 having such a size and shape is molded by using a resin such as polyacetal having mechanical strength, and the facing plate 34 and the clip arm portion 36 are widened when the facing distance is widened or the diameter is expanded. Exhibits elasticity. As shown in the figure, in the clip 30, the clip arm portion 36 has the small diameter portion 1 in the connector 10.
3, the cutout 38 is mounted on the connector 10 from above as shown by the arrow in the direction such that the notch 38 is located on the side of the second tubular body 18 inserted into the connector 10. FIG. 2 shows a schematic cross section along the axial direction in a state where the clip 30 is assembled to the connector 10.

When the clip 30 is assembled in this way, as shown in FIG. 3 which is a sectional view taken along line 3-3 of FIG. Since the width 11 is held, the clip 30 and the connector 10 are integrated. In addition, the small diameter portion 1 is formed by the clip arm portion 36 whose effective diameter is smaller than the outer diameter of the small diameter portion 13.
Since 3 is gripped, the clip 30 is fixed to the connector 10. The cutout 38 of the clip 30 is shown in FIG.
As shown in FIG. 2 and FIG.
It is bent and inserted outside 0. In other words, the clip 30 is the second one within the range of being inserted into the connector 10.
The notch 38 engages with the second pipe 18 at a position deviated from the extension of the trajectory of the straight pipe path of the pipe of the pipe 18.

In the pipe connection structure of the embodiment described above,
The connector 10 itself includes a tube stopper 26 and a second tube 18
There is no difference from the conventional one in that the second tubular body 18 is prevented from coming off by the expansion collar portion 28 and that the second tubular body 18 is sealed by the O-rings 20 and 22. The first tubular body 14 and the second tubular body 18 are connected by the connector 10.
And connect.

On the other hand, in the pipe connection structure of this embodiment,
The clip 30 was integrated with the connector 10, and the second tubular body 18 was engaged with the clip 30 at a position deviated from the extension line of the trajectory of the straight pipeline inside the connector 10. Therefore, even if a force (rotational force) that relatively rotates one of the first tube body 14 and the second tube body 18 about the locus of this straight tube path,
Since the engagement position between the second tubular body 18 and the clip 30 deviates from the extension of the trajectory of the straight tubular path, the second tubular body 1
8 does not rotate under the force against this rotational force.

In the clip 30, the width across flats 11 of the connector 10 is fitted between the opposing plates 34 so that the connector 10 can be inserted.
It has the following advantages. Since the clip 30 can be fixed to the connector 10 after the second pipe 18 is inserted into the connector 10, it does not hinder the insertion work of the second pipe 18. The notch 38 of the clip 30 is engaged with the second tube body 18 itself bent outside the connector 10, so that no special member is required, which is advantageous in terms of cost. By simply replacing the existing connector 10 with a connector having the width across flats 11 and the small diameter portion 13, it is possible to easily remodel the tube connection structure in which the relative rotation of the second tube 18 does not occur. Since the second pipe body 18 may be bent outside the connector 10 only within the range in which the notch 38 engages, the connection target at the other end of the second pipe body 18 is a straight pipe inside the connector 10. There is no problem even if it is an extension of the path of the road. Specifically, as shown by the alternate long and short dash line in FIG.
It suffices if the second tubular body 18 is curved in a U-shape at the engagement position of 8.

Next, another embodiment will be described. In the following description of the embodiments, configurations different from those of the above embodiments will be described.

The pipe connecting structure of the second embodiment has a connector 10A which replaces the connector 10, as shown in the perspective view of FIG. 4 and the schematic cross section along the axial direction of FIG. The connector 10A has a protruding portion 40 having a curved cross section continuously at the insertion side end of the second tubular body 18. The center of the end of the protrusion 40 in the longitudinal direction is a notch 42 having a width slightly wider than the outer diameter of the second tubular body 18.

Also in the pipe connecting structure of the second embodiment, the second pipe 18 is bent and inserted into the notch 42 as shown in FIGS. 18 is a position deviated from the extension of the trajectory of the straight conduit inside the connector 10, and is engaged with the protrusion 40 by the notch 42. Therefore, the second tube body 18 is not relatively rotated even by the tube body connection structure of the second embodiment.
Further, in the pipe body connecting structure of the second embodiment, since the projecting portion 40 is integrated with the connector 10 from the beginning, it is preferable because parts management becomes easy. In this case, even if the projecting portion 40 is integrated with the connector 10, the second tubular body 18 can be bent and inserted into the notch 42 after the second tubular body 18 is inserted. It does not hinder the insertion work of 18. Of course, the protrusion 40 may be provided on the connector 10 in a flat plate cross section like the clip 30.

In the pipe body connecting structure of the third embodiment, as shown in FIG. 6 which is a schematic exploded perspective view thereof and FIG. 7 which is a schematic cross section taken along the axial direction in the assembled state, a clip 30A which replaces the clip 30 is shown. Have. This clip 30A
Has a flat plate-shaped upper plate 32A having a length sufficient to cover the connector 10 from its upper surface, has opposite plates 34 on both side surfaces thereof in the same manner as the clip 30, and has a center at one end side in the longitudinal direction. It has a clip arm 36. Further, at the center of the other end side in the longitudinal direction of the upper plate 32A, there is a tubular body engaging arm 44 below it. As shown in FIG. 8 which is an enlarged sectional view taken along line 8-8 of FIG. 7, the tubular body engaging arm 44 has a second tubular body 18 in cross section.
Has an arcuate curved cross section so as to hold the inner diameter of the second tubular body 18 is slightly larger than the outer diameter of the second tubular body 18. When the clip 30A is integrally fixed to the connector 10 by the facing plate 34 and the clip arm portion 36, the pipe body engaging arm 44 extends from the end portion of the connector 10 to the pipe of the second pipe body 18 as illustrated. A straight line portion extending along the road is formed to curve in the middle.

In the tube body connecting structure of the third embodiment, the tube body engaging arm 44 of the clip 30A is made to follow the path of the second body.
The tubular body 18 is bent and inserted. Therefore, even with the pipe connection structure of the third embodiment, the second pipe 18
Is engaged and gripped by the tubular body engaging arm 44 of the clip 30A at a position deviated from the extension of the trajectory of the straight pipeline inside the connector 10. Therefore, the second pipe body 18 is not relatively rotated even by the pipe body connecting structure of the third embodiment. In addition, the second tubular body 18 includes the tubular body engaging arm 44.
Is inserted into the straight line portion of the connector, then inserted into the connector 10, and then curved and engaged and gripped by the tubular body engaging arm 44.

In the pipe connecting structure of the fourth embodiment, a clip 50 shown in a schematic perspective view of FIG. 9 is used instead of the above-mentioned clips 30, 30A. The clip 50 is formed in a box shape having the upper plate 32 of the clip 30 as one wall surface. The clip 50 has a side plate 52 that replaces the facing plate 34, and the side plate 5 is covered by the lid 54.
It is configured to close the two openings. in this case,
The facing distance between the side plates 52 is made slightly wider than the width dimension of the width across flats 11 of the connector 10. The lid 54 is provided with an engaging arm 56 having a projection at its tip, and one side plate 52 is provided with an engaging portion 58 into which the engaging arm 56 is inserted and engaged. Clip 5 for reinforcement
A reinforcing plate 60 is provided at one end of 0, and an opening 62 into which the small-diameter portion 13 naturally enters is formed in the reinforcing plate 60.

In this clip 50, the side plate 5 is attached to the connector 10 with the lid 54 opened.
The connector 10 is housed in the clip 50 so that the width across flat 11 is sandwiched between the two. Then, when the lid 54 is closed, the clip 50 surrounds the connector 10 and is fixed integrally with the connector 10. Then, the second tubular body 18 is bent outside the connector 10 and the upper plate 32 is bent.
Is inserted into the notch 38 and engages with the upper plate 32 at a position deviated from the extension line of the trajectory of the straight conduit inside the connector 10. Therefore, the second pipe body 18 is not relatively rotated even by the pipe body connecting structure of the fourth embodiment.

The embodiment of the present invention has been described above.
The present invention is not limited to the above examples and embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

[0026]

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a pipe connection structure according to a first embodiment.

FIG. 2 is a schematic cross-sectional view taken along the axial direction in a state where the clip 30 is assembled to the connector 10.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a schematic perspective view of a pipe connection structure according to a second embodiment.

FIG. 5 is a connector 1 in the pipe connection structure of the second embodiment.
The schematic sectional drawing which shows 0A as a sectional view along the axial direction.

FIG. 6 is a schematic exploded perspective view of a pipe connection structure according to a third embodiment.

FIG. 7 is a schematic cross-sectional view taken along the axial direction with the clip 30A attached to the connector 10.

8 is an enlarged sectional view taken along line 8-8 of FIG.

FIG. 9 is a clip 5 in the pipe connecting structure of the fourth embodiment.
The schematic perspective view of 0.

FIG. 10 is a schematic cross-sectional view showing a connector in a conventional tubular body connecting structure in a sectional view along the axial direction thereof.

[Explanation of symbols]

10, 10A ... Connector 11 ... Width across flats 12 ... bamboo shoot 13 ... Small diameter part 14 ... First tube 16 ... Storage hole 18 ... Second tube 20,22 ... O-ring 24 ... Edge storage hole 26. Tubular retainer 28 ... Expansion collar part 30, 30A ... clip 32, 32A ... Upper plate 34 ... Facing plate 36 ... Clip arm 38 ... Notch 40 ... Projection 42 ... Notch 44 ... Tube engaging arm 50 ... clip 52 ... Side plate 54 ... Lid 56 ... Engaging arm 58 ... Engagement part 60 ... Reinforcing plate 62 ... Opening

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographical report 5-42886 (JP, U) Actual report 61-114190 (JP, U) Actual report 5-47347 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) F16L 17/03

Claims (4)

(57) [Claims] 1. A tubular body connecting structure for connecting a first tubular body and a second tubular body, wherein the second tubular body is watertightly fixed to an end portion of the first tubular body. A connector which is inserted and has a retaining means for preventing the inserted second tubular body from being axially removed, and a sealing means for contacting the outer periphery of the second tubular body and keeping the tubular body watertight; A connector fixing body fixed to the connector, the connector fixing body having an arm extending toward the second pipe body, wherein the second pipe body is within a range of being inserted into the connector.
From the extension of the trajectory of the straight pipe line of the second pipe body in
A tubular body connecting structure , comprising: a pipe path portion having a curved locus so that the arm portion has an engaging portion that engages with the pipe path portion having the curved locus of the second tubular body . 2. The tubular body connecting structure according to claim 1, wherein the connector fixing body has a connector mounting recess that follows the external shape of the connector, and is fitted into the connector at the connector mounting recess. Fixed tube connection structure. 3. The pipe connecting structure according to claim 1, wherein the arm portion of the connector fixing body projects from the connector and is integrated with the connector. 4. The pipe connecting structure according to claim 1, wherein the engaging portion of the arm portion has a notch or a second pipe into which the second pipe can be inserted. A tubular body connection structure having an arcuate curved cross-sectional shape capable of gripping a body.