JP2012219659A - Conjugating tube - Google Patents

Abstract

A facing surface between a covering piece portion and a tube portion even in a joining tube in which the vertical positional relationship between a first mating surface portion of a first divided body and a second mating surface portion of a second divided body is reversed depending on an arrangement region. In the meantime, make sure that there are no areas where water easily accumulates, and that the deterioration with time due to water immersion does not occur.
In a first part A where a first mating surface portion 30 of a first divided body 28 is located vertically above a second mating surface portion 32 of a second divided body 22, a covering piece portion 36 is formed on the first divided body 28. On the other hand, in the second part B where the second mating surface portion 32 is located vertically above the first mating surface portion 30, the covering piece portion 38 is formed on the second divided body 22.
[Selection] Figure 1

Description

  The present invention relates to a joining pipe, and more particularly to a joining pipe that forms a pipe portion by joining two divided bodies applied to a resin intake pipe for an internal combustion engine.

  As a joining pipe applied to a resin intake pipe or the like, by joining a first mating surface portion (joining portion) formed in the first divided body and a second mating surface portion (joining portion) formed in the second divided body A tube portion is formed, and extends from one of the first divided body and the second divided body so as to straddle the joint portion between the first mating surface portion and the second mating surface portion, and the joint portion is externally provided. There is known a bonded tube in which a covering piece portion that is invisible, that is, hides the bonded portion, is formed along the extending direction of the bonded portion (for example, Patent Document 1).

JP 2009-2220 A

  Some intake pipes used in an internal combustion engine are curved in a C shape by using, for example, a saddle posture in order to obtain a required intake passage length in a small space. When the above-described joining pipe is applied to such an intake pipe, and the curved inner side is constituted by the first divided body and the curved outer side is constituted by the second divided body, the second mating surface portion is vertically above the first mating surface portion in the upper region. Since the first mating surface portion is positioned vertically above the second mating surface portion in the lower region, when the covering piece portion is provided on the first divided body over the entire area of the joining portion, the covering piece portion is The air-opening gap (gap) defined in a bag shape between the surfaces facing the pipe portion is a downward opening in the lower region, but is an upward opening in the upper region, and water tends to accumulate in the portion. On the contrary, when the covering piece portion is provided in the second divided body over the entire area of the joint portion, the above-described gap is an upward opening in the upper region, but an upward opening in the lower region. Water tends to accumulate.

  Such a pool of water may cause deterioration of the bonded pipe over time.

  The problem to be solved by the present invention is that even if the joining pipe portion has a shape in which the vertical positional relationship between the first mating surface portion of the first divided body and the second mating surface portion of the second divided body is reversed depending on the arrangement region, the covering piece portion It is to prevent a portion where water is likely to accumulate between the opposing surfaces (gap) of the tube portion and the pipe portion.

  The joining pipe | tube by this invention is a pipe part by joining the 1st mating surface part (30) formed in the 1st division body (28), and the 2nd mating surface part (32) formed in the 2nd division body (22). (14) is formed, and a joint portion between the first mating surface portion (30) and the second mating surface portion (32) from any one of the first segment (28) and the second segment (22). (34) is a joining pipe in which covering pieces (36, 38) extending outside the pipe so as to straddle the covering part (34) are formed along the extending direction of the joining part (34). The joining portion (34) includes a first portion (A) in which the first mating surface portion (30) is positioned vertically above the second mating surface portion (32), and the second mating surface portion (32) is the A second portion (B) positioned vertically above the first mating surface portion (30), and the covering piece portions (36, 38) are Wherein the first portion (A) formed on said first split body (28) is formed in the second portion (B) in the second split body (22).

  According to this configuration, in both the first part (A) and the second part (B), the covering piece portions (36, 38) are formed by the first divided body (28) or the second divided body (22). Since it extends downward, even if the covering pieces (36, 38) define a gap (40, 42) between the first divided body (28) or the second divided body (22), All of these gaps (40, 42) form a groove having a downward opening, and natural drainage is performed, so that water does not accumulate in these portions.

  In one embodiment of the joining pipe according to the present invention, the joining part (34) further extends in a substantially vertical direction between the first part (A) and the second part (B). 3 portions (C), and any one of the covering pieces (36, 38) formed in the first portion (A) and the second portion (B) is almost the entire area of the third portion. It extends over.

  According to this configuration, the entire area of the joint portion (34) in the third region (C) can be hidden by any one of the covering piece portions (36, 38), and the commercial quality of the joint tube is improved.

  In one embodiment of the joining pipe according to the present invention, the joining part (34) further extends in a substantially vertical direction between the first part (A) and the second part (B). 3 parts (C), and both of the covering pieces (36, 38) formed in the first part (A) and the second part (B) reach the third part (C). It is extended.

  According to this structure, the joint part (34) in a 3rd site | part (C) can be hidden by both the covering piece parts (36, 38), and the commercial property of a joining pipe | tube improves.

  In the joining pipe according to the present invention, preferably, the first divided body (28) and the second divided body (22) are resin molded products, and the first mating surface portion (30) and the second mating surface portion (32). ) And are joined by welding.

  According to this configuration, the structure in which water does not accumulate is highly useful for avoiding adverse effects on the resin product due to the water accumulation.

  The joining pipe | tube by this invention comprises the intake pipe used for an internal combustion engine as one embodiment.

  According to this configuration, accumulation of water is avoided in the intake pipe that is used in an environment where there is flooding such as rainwater.

  According to the joining pipe of the present invention, the covering piece portion extends below the first divided body or the second divided body in both the first portion and the second portion. Even if a gap is defined between the first divided body and the second divided body, all of these gaps become grooves of a downward opening, and natural drainage is performed, and water does not accumulate in these portions. Thereby, deterioration with time due to water immersion hardly occurs in the bonded pipe.

The side view which shows one Embodiment of the intake manifold for internal combustion engines by which the junction pipe by this invention was applied to the branch pipe part. The expansion perspective view of the principal part of the joining pipe by this embodiment. The expanded sectional view along line III-III of FIG. The expanded sectional view along line IV-IV of FIG. The side view which shows other embodiment of the intake manifold for internal combustion engines by which the junction pipe by this invention was applied to the branch pipe part.

  Hereinafter, an embodiment of an intake manifold for an internal combustion engine in which a joint pipe according to the present invention is applied to a branch pipe portion will be described with reference to the drawings.

  As shown in FIG. 1, the intake manifold 10 includes a collecting pipe portion 12 that takes air from an intake intake (not shown), and a branch pipe portion 14 that branches from the collecting pipe portion 12 by the number of cylinders of the internal combustion engine. And have. The branch pipe part 14 is curved in a C shape by using a saddle posture and is connected to the collecting pipe part 12 on the upstream end side. A horizontal pipe portion 16 extending horizontally is formed on the lower end side of the branch pipe portion 14. The horizontal portion 16 is fixed to a cylinder head of an internal combustion engine (not shown) by a connection flange portion 18 formed at the tip portion.

  The intake manifold 10 is a resin molded product made of polyamide resin or the like, and is constituted by a three-part assembly including a manifold body 24, a collecting pipe part cover 26, and a branch pipe part cover 28. The manifold main body 24 includes a collecting pipe component part 20 that constitutes most of the collecting pipe part 12, a half-shaped branch pipe component part 22 that forms a curved inner side of the branch pipe part 14, a horizontal part 16, and a connection flange part 18. And is integrally molded. The collecting pipe part cover 26 forms the remaining part of the collecting pipe part 12, and is welded to the collecting pipe constituting part 20 of the manifold body 24 by vibration welding or the like to complete the collecting pipe part 12. The branch pipe part cover 28 has a halved shape that forms the curved outer side of the branch pipe part 14, and is welded to the branch pipe component 22 by vibration welding or the like to complete the branch pipe part 14.

  In this embodiment, the branch pipe part cover 28 is a 1st division body, and the branch pipe component 22 is a 2nd division body. Next, details of the junction structure between the branch pipe component 22 and the branch pipe portion cover 28 will be described with reference to FIGS.

  A first mating surface portion 30 having a predetermined flange width is formed over the entire half-end surface portion of the branch pipe portion cover 28. A second mating surface portion 32 having a predetermined flange width is formed over the entire half-end surface portion of the branch pipe component 22. The branch pipe component 22 and the branch pipe portion cover 28 are hermetically coupled and closed inward by mutually welding the entire first mating surface portion 30 and second mating surface portion 32 to each other by vibration welding or the like. A cross-sectional intake passage is defined. 1 to 3, reference numeral 34 indicates a joint portion between the first mating portion 30 and the second mating portion 32 by welding.

  As shown in FIG. 3, the joint 34 has a first alignment as shown in FIG. 3 in the use of the saddle posture of the intake manifold 10 shown in FIG. 1 because the branch pipe portion 14 is curved in a C shape. The portion 30 has a first portion (upper curved portion) A positioned vertically above the second mating portion 32 in the upper region, and as shown in FIG. The second mating portion 32 has a second region (lower curved portion) B located vertically above the first mating portion 30 in the lower region. Further, the joining portion 34 extends a substantially vertical direction between the first part A and the second part B, and connects a third part (vertical straight part) C connecting the first part A and the second part B. Have.

  A skirt-shaped first covering piece portion 36 is provided on the outer side of the pipe at the half end surface portion of the branch pipe portion cover 28 from the first mating surface portion 30 over the entire area of the first portion A and the third portion C. It is formed along the extending direction of the joint 34. Further, a skirt-like second covering piece portion 38 extends from the second mating surface portion 32 to the outer side of the second mating surface portion 32 on the half end surface portion of the branch pipe component 22, and the joint portion 34 extends over the entire region of the second portion B. It is formed along the direction. As a result, the first covering piece 36 extends downward from the branch pipe cover 28 toward the branch pipe component 22 over the entire first part A, and the branch pipe part cover 28 at the third part C. It extends in the horizontal direction toward the branch pipe component 22. The second covering piece part 38 extends downward from the branch pipe component 22 toward the branch pipe part cover 28 over the entire region of the second part B.

  The first covering piece portion 36 and the second covering piece portion 38 are for aesthetically obscuring welding burrs generated in the joint portion 34 from the outside, and each of the first cover piece portion 36 and the second cover piece portion 38 has a predetermined interval on the outer side of the joint portion 34. It extends to the outside of the tube so as to straddle it and hides the joint 34.

  The first covering piece portion 36 and the second covering piece portion 38 are formed on the outer side of the pipe from the joint portion 34 so that the first covering piece portion 36 is an outer surface portion of the branch pipe component 22. An air gap 40 (see FIG. 3) with the tip side open to the atmosphere is formed between the second covering piece portion 38 and the outer surface portion 28A of the branch pipe portion cover 28, and a space with the tip side open to the atmosphere. 42 (see FIG. 4) is defined.

  In the first region A, as shown in FIG. 3, the first covering piece 36 extends downward from the branch pipe part cover 28 toward the branch pipe component 22, so that the gap 40 is at the lower side. It becomes an opening groove. On the other hand, in the second part B, as shown in FIG. 4, the second covering piece portion 38 extends downward from the branch pipe component 22 toward the branch pipe cover 28. The gap 42 also becomes a groove having a downward opening.

  Thus, even if the vertical positional relationship between the first mating surface portion 30 of the branch pipe portion cover 28 and the second mating surface portion 32 of the branch pipe component 22 is reversed between the first portion A and the second portion B, the first A gap 40 defined between the first covering piece 36 and the outer surface portion 22A of the branch pipe component 22 is defined between the second covering piece portion 38 and the outer surface portion 28A of the branch pipe portion cover 28. In any of the gaps 42, natural drainage is performed well, and rainwater or the like does not accumulate in any of the gaps 40, 42. As a result, the manifold main body 24 and the branch pipe portion cover 28 are unlikely to deteriorate with time due to water immersion.

  Further, since the first covering piece portion 36 is provided over almost the entire area of the section of the third portion C, the joint portion 34 in the third portion C is also almost formed by the first covering piece portion 36 of the branch pipe portion cover 28. The entire area is hidden, and the merchantability of the intake manifold 10 is improved. In the third portion C, the air gap 40 defined between the first covering piece 36 and the outer surface portion 22A of the branch pipe component 22 is a groove extending in the vertical direction, so that natural drainage is good. The water does not collect in the part.

  The third portion C is replaced by the second covering piece portion 38 by extending the second covering piece portion 38 of the branch pipe component 22 over almost the entire area of the third portion C instead of the first covering piece portion 36. Thus, it is possible to hide the substantially entire region of the joint portion 34 in the third portion C. Further, as shown in FIG. 5, by extending both the first covering piece portion 36 and the second covering piece portion 38 to the third portion C, the first covering piece portion 36 and the second covering piece. A configuration in which almost the entire region of the joint 34 in the third portion C is hidden by both the portions 38 can also be adopted.

  As shown in FIG. 2, the abutting portion between the first covering piece portion 36 and the second covering piece portion 38 is stopped in a small gap so as to make the joining portion 34 as invisible as possible from the outside. Or the structure which mutually contacts may be sufficient. Furthermore, the 1st coating piece part 36 and the 2nd coating piece part 38 may be the structure which overlaps with a space | gap in the piece thickness direction in a butt | matching part.

  Further, as shown in FIG. 3, the split end surface portion of the branch pipe portion cover 28 protrudes from the first mating surface portion 30 to the inside of the tube over the section of the first portion A and the third portion C. The piece 44 is integrally formed in parallel with the first covering piece 36 along the extending direction of the joint 34. The projecting piece 44 abuts on a step 46 formed along the extending direction of the joint 34 over the section of the first part A and the third part C of the half end face part of the branch pipe component 22. In the first part A and the third part C, the bonding portion 34 is positioned in the welding depth direction. Further, as shown in FIG. 4, the projecting piece 48 is joined to the halved end surface portion of the branch pipe component 22 on the inner side of the pipe from the second mating surface portion 30 over the section of the second portion B. It is integrally formed in parallel with the second covering piece portion 38 along the extending direction of the portion 34. The second projecting piece portion 48 abuts on a step portion 50 formed along the extending direction of the joint portion 34 in the section of the second portion B of the split end surface portion of the branch pipe portion cover 28, and the second portion B Positioning in the welding depth direction of the joint portion 34 is performed.

  As shown in FIG. 1, a covering piece portion 52 that conceals a welded portion (joint portion) between the collecting pipe portion cover 26 and the manifold body 24 is also integrally formed in the collecting pipe portion cover 26.

  In the above-described embodiment, the gaps 40 and 42 are provided. However, the gaps 40 and 42 are not essential, and the first covering piece portion 36 is in contact with the outer surface portion 22A of the branch pipe component 22, and the second covering is performed. The piece portion 38 may be in contact with the outer surface portion 28 </ b> A of the branch pipe portion cover 28. Further, the joint pipe according to the present invention is not limited to application to an intake manifold or intake pipe for an internal combustion engine, and can be applied to various pipe members. Moreover, the joining pipe | tube by this invention is not restricted to the thing made from resin, The casting-made or sheet-metal joining pipe | tube may be sufficient.

DESCRIPTION OF SYMBOLS 10 Intake manifold 12 Collecting pipe part 14 Branch pipe part 20 Collecting pipe component part 22 Branch pipe component part (2nd division body)
24 Manifold body 26 Collecting pipe part cover 28 Branch pipe part cover (first divided body)
30 First mating portion 32 Second mating portion 34 Joint portion 36 First covering piece portion 38 Second covering piece portion 40, 42 Gap

Claims (5)

A pipe part is formed by joining the first mating surface portion formed on the first divided body and the second mating surface portion formed on the second divided body, and either one of the first divided body and the second divided body is formed. A covering piece portion extending so as to straddle the joint portion between the first mating surface portion and the second mating surface portion and concealing the joint portion is formed along the extending direction of the joint portion. ,
The joint portion includes a first portion where the first mating surface portion is located vertically above the second mating surface portion, and a second portion where the second mating surface portion is located vertically above the first mating surface portion. ,
The said covering piece part is a joined pipe currently formed in the said 1st division body in the said 1st site | part, and is formed in the said 2nd division body in the said 2nd site | part. The joint has a third part extending in a substantially vertical direction between the first part and the second part,
The joining pipe according to claim 1, wherein any one of the covering piece portions formed in the first part and the second part extends over substantially the entire area of the third part. The joint has a third part extending in a substantially vertical direction between the first part and the second part,
The joining pipe according to claim 1, wherein both of the covering piece portions formed at the first part and the second part extend to the third part.   The said 1st division body and the said 2nd division body are resin molded products, The said 1st mating surface part and the said 2nd mating surface part are joined by welding, As described in any one of Claim 1 to 3 Joining tube.   The joining pipe according to any one of claims 1 to 4 which constitutes an intake pipe used for an internal combustion engine.

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