JP2014190298A - Joint for piping of engine - Google Patents

Abstract

An engine piping joint that can prevent a decrease in sealing performance between a gasket and an eye joint is provided.
An eye joint is provided with an eye joint, a hollow bolt, and an annular gasket. The eye joint is formed by projecting a pipe part from an outer peripheral wall of the ring part. The hollow bolt 2 is inserted into the bolt hole 8 formed in the wall 7 of the engine component 6, and the hollow bolt 2 is screw-fitted between the bolt head 9 of the hollow bolt 2 and the ring portion 3 of the eye joint 1. In the joint for an engine piping in which the gasket 10 is disposed, the gasket 10 is provided with a detent means 11 so that when the hollow bolt 2 is tightened, it is rotated by the bolt head 9 of the rotating hollow bolt 2. The gasket 10 is configured to be prevented from rotating with respect to the ring portion 3 of the eye joint 1 by the rotation stopping means 11.
[Selection] Figure 1

Description

  The present invention relates to an engine piping joint, and more particularly, to an engine piping joint that can prevent deterioration in sealing performance between a gasket and an eye joint.

Conventionally, there are the following piping joints for engines (see, for example, Patent Document 1).
The eye joint includes an eye joint, a hollow bolt, and an annular gasket. The eye joint is constructed by projecting a pipe portion from the outer peripheral wall of the ring portion, and a hollow bolt is inserted through the center of the ring portion, and is placed on the wall of the engine part. A joint for engine piping, in which a hollow bolt is screwed into a provided bolt hole, and a gasket is disposed between a bolt head portion of the hollow bolt and a ring portion of the eye joint.

  According to this type of joint for piping, there is an advantage that the piping can be easily connected to the engine component.

  However, this conventional technique has a problem because the gasket has no anti-rotation function.

JP 2012-41908 A (see FIG. 1)

<< Problem >> There is a possibility that the sealing performance between the gasket and the eye joint may be deteriorated.
Since the gasket has no anti-rotation function, when the hollow bolt is tightened, the gasket is rotated around the bolt head of the rotating hollow bolt, and the contact surface between the gasket and the ring part of the eye joint is rubbed. In this case, metal deposition occurs, and the sealing performance between them may be reduced.

  The subject of this invention is providing the coupling for engines piping which can prevent that the sealing performance between a gasket and an eye joint falls.

(Invention of Claim 1)
Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIGS. 1A to 1F, an eye joint (1), a hollow bolt (2), and an annular gasket (10) are provided.
The eye joint (1) is constructed by projecting a pipe part (5) from the outer peripheral wall (4) of the ring part (3),
A hollow bolt (2) is inserted through the center of the ring part (3), and the hollow bolt (2) is screwed into a bolt hole (8) provided in the wall (7) of the engine component (6). In the joint for engine piping, in which the gasket (10) is disposed between the bolt head (9) of (2) and the ring part (3) of the eye joint (1),
As illustrated in FIGS. 1 (A) (G) to 5 (A)-(C), the gasket (10) is provided with a detent means (11) and rotates when the hollow bolt (2) is tightened. The gasket (10) to be rotated by the bolt head (9) of the hollow bolt (2) is locked against the ring (3) of the eye joint (1) by the locking means (11). It is comprised in the coupling for engines piping characterized by the above-mentioned.

(Invention of Claim 6)
Invention specific matters of the invention according to claim 6 are as follows.
The joint for engine piping according to claim 1,
As illustrated in FIGS. 1 (A) (G) to 5 (A)-(C), instead of the gasket (10) being provided with the detent means (11),
As illustrated in FIGS. 6A to 6F, a gasket 10 having rubber elasticity is baked and fixed to the end face of the ring portion 3 of the eye joint 1.
When the hollow bolt (2) is tightened, the gasket (10) that is about to be rotated by the bolt head (9) of the rotating hollow bolt (2) is prevented from rotating around the ring (3) of the eye joint (1). It is comprised so that it may be, The coupling for piping of an engine characterized by the above-mentioned.

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<< Effect >> It can prevent that the sealing performance between a gasket and an eye joint falls.
As illustrated in FIGS. 1 (A) (G) to 5 (A)-(C), the gasket (10) is provided with a detent means (11), and the hollow bolt (2 illustrated in FIG. ) Is tightened by the bolt head (9) of the rotating hollow bolt (2) and the ring (3) of the eye joint (1) is turned by the detent means (11). The friction of the contact surface between the gasket (10) and the ring part (3) of the eye joint (1) caused by the rotation of the gasket (10) It is possible to prevent the occurrence of metal vapor deposition on the contact surfaces of these and to prevent the sealing performance between them from deteriorating.

(Invention of Claim 2)
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> The anti-rotation means can be easily formed.
As illustrated in FIGS. 1 (G) and 2 (A)-(H), the detent means (11) is composed of a tongue piece (12) led out radially from the periphery of the gasket (10). Therefore, the rotation stop means (11) can be easily formed.

(Invention of Claim 3)
The invention according to claim 3 has the following effects.
<Effect> The anti-rotation means can be easily formed.
As illustrated in FIGS. 3 (A) to 3 (D), the anti-rotation means (11) is led out from the outer peripheral edge of the gasket (10) toward the ring portion (3) of the eye joint (1) (13 ), The anti-rotation means (11) can be easily formed.

(Invention of Claim 4)
The invention according to claim 4 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> High sealing performance of gasket.
As illustrated in FIGS. 4A to 4F, an annular bead (14) in which the detent means (11) protrudes from the surface of the gasket (10) toward the ring portion (3) of the eye joint (1). ), And the anti-rotation surface (15) is formed by retreating a part of the circumferential surface of the annular bead (14) into the annular bead (14). Due to the sealing function of the annular bead (14), the sealing performance of the gasket (10) is high.

(Invention according to claim 5)
The invention according to claim 5 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> High sealing performance of gasket.
As illustrated in FIGS. 5A to 5C, the anti-rotation means (11) has a protrusion (16) protruding from the surface of the gasket (10) toward the ring part (3) of the eye joint (1). Since the rubber elastic seal layer (17) provided on the surface of the gasket (10) is used, the gasket (10) has high sealing performance due to the sealing function of the rubber elastic seal layer (17).

(Invention of Claim 6)
<< Effect >> It can prevent that the sealing performance between a gasket and an eye joint falls.
As illustrated in FIGS. 6 (A)-(D), a rubber-elastic gasket (10) is baked and fixed to the end face of the ring portion (3) of the eye joint (1), and the hollow bolt (2) is tightened. At the time of insertion, the gasket (10) to be rotated by the bolt head (9) of the rotating hollow bolt (2) is configured to be locked to the ring part (3) of the eye joint (1). Therefore, the friction of the contact surface between the gasket (10) and the ring part (3) of the eye joint (1) due to the rotation of the gasket (10) and the occurrence of metal deposition on these contact surfaces are prevented. And it can prevent that the sealing performance between these falls.

<Effect> High sealing performance of gasket.
As illustrated in FIGS. 6A and 6B, the rubber elastic gasket 10 is baked and fixed to the end face of the ring portion 3 of the eye joint 1 so that it has a rubber elastic sealing function. Therefore, the sealing performance of the gasket (10) is high.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the joint for piping of the engine which concerns on 1st Embodiment of this invention, FIG. 1 (A) is a vertical front view of a joint, FIG. 1 (B) is a front view of a joint, FIG. 1D is a plan view of the eye joint, FIG. 1E is a front view of the hollow bolt, FIG. 1F is a left side view of the hollow bolt, and FIG. 1G is a gasket. FIG. 1H is a cross-sectional view taken along line HH in FIG. It is explanatory drawing of the gasket used with the joint for piping of the engine which concerns on 2nd Embodiment group of this invention, FIG. 2 (A) is a left view of a basic example, FIG.2 (B) is B- of FIG. 2B is a left side view of the first modified example, FIG. 2D is a sectional view taken along the line DD of FIG. 2C, and FIG. 2E is the second modified example. 2F is a cross-sectional view taken along line FF of FIG. 2E, FIG. 2G is a left side view of the third modification, and FIG. 2H is FIG. 2G. It is a HH line sectional view. It is explanatory drawing of the gasket used with the joint for piping of the engine which concerns on 3rd Embodiment group of this invention, FIG. 3 (A) is a right view of a basic example, FIG.3 (B) is B- of FIG. FIG. 3C is a cross-sectional view taken along line B, FIG. 3C is a right side view of the modification, and FIG. 3D is a cross-sectional view taken along line DD in FIG. It is explanatory drawing of the gasket used with the joint for piping of the engine which concerns on 4th Embodiment group of this invention, FIG. 4 (A) is a right view of a basic example, FIG.4 (B) is B- of FIG.3 (A). 4B is a cross-sectional view taken along the line CC of FIG. 3A, FIG. 4D is a right side view of the modified example, and FIG. 4E is an E view of FIG. 4D. FIG. 4F is a cross-sectional view taken along line -E, and FIG. 4F is a cross-sectional view taken along line FF in FIG. It is explanatory drawing of the gasket used with the joint for piping of the engine which concerns on 5th Embodiment of this invention, FIG. 5 (A) is a right view, FIG.5 (B) is BB sectional drawing of FIG. 5 (A). FIG. 5C is a cross-sectional view taken along the line CC of FIG. It is a figure explaining the joint for piping of an engine concerning a 6th embodiment of the present invention, and Drawing 6 (A) is a longitudinal front view of a joint, Drawing 6 (B) is a front view of a joint, and Drawing 6 (C) is an eye. 6 (D) is a plan view of the eye joint, FIG. 6 (E) is a front view of the hollow bolt, and FIG. 6 (F) is a left side view of the hollow bolt. It is a figure explaining the usage example 1 which used the coupling which concerns on 1st Embodiment as a coupling for fuel piping of the fuel injection pump of a diesel engine, FIG. 7 (A) is a vertical front view, FIG.7 (B) is a left view. It is. It is a figure explaining the example 2 of use which used the coupling concerning a 1st embodiment as a coupling for fuel piping of a fuel filter of a diesel engine, and Drawing 8 (A) is a longitudinal front view, and Drawing 8 (B) is a left view. is there.

  1 is a first embodiment of the present invention, FIG. 2 is a second embodiment group, FIG. 3 is a third embodiment group, FIG. 4 is a fourth embodiment group, FIG. 5 is a fifth embodiment, and FIG. It is explanatory drawing of 6 embodiment and all are related with the coupling for external piping of an engine.

The joint according to the first embodiment will be described.
As shown to FIG. 1 (A)-(H), the eye joint (1), the hollow volt | bolt (2), and the annular | circular shaped gasket (10) are provided.
The eye joint (1) is configured by projecting a pipe portion (5) from an outer peripheral wall (4) of a ring portion (3).
A hollow bolt (2) is inserted in the center of the ring part (3) shown in FIG. 1 (A), and the hollow bolt (2) is inserted into a bolt hole (8) provided in the wall (7) of the engine component (6). The gasket (10) is disposed between the bolt head (9) of the hollow bolt (2) and the ring portion (3) of the eye joint (1).
A pipe (5) is connected to the pipe part (5), the fluid (20) passes through the eye joint (1) and the hollow bolt (2), and between the pipe (19) and the engine component (6). The fluid (20) is transferred.

As shown in FIGS. 1 (A)-(D), the ring portion (3) has a hexagonal ring shape and is provided with a circular ring groove (27) on the inner periphery. Bolt insertion holes (30) and (30) are provided at the center of both end walls of the ring portion (3). The pipe portion (5) has a cylindrical shape and is provided with one circular retaining protrusion (28) on the outer peripheral surface of the tip portion. The pipe portion (5) and the ring groove (27) communicate with each other.
As shown in FIGS. 1 (A), (B), (E), and (F), the hollow bolt (2) includes a bolt head (9) at the base end of the shaft (23), and the shaft (23) A male screw portion (25) is provided on the outer peripheral surface near the tip. A fluid relay hole (23a) is provided in the shaft portion (23), and a pair of communication ports (26, 26) facing each other are provided on the peripheral wall near the base end of the shaft portion (23). (26) (26) and the fluid relay hole (23a) communicate with each other.
As shown in FIG. 1A, the shaft portion (23) of the hollow bolt (2) is inserted into the bolt insertion holes (30), (30) of the ring portion (3), and the fluid inlets (26), (26) are inserted. It faces the ring groove (27).
Between the bolt head (9) and the ring part (3) of the hollow bolt (2) and between the ring part (3) and the wall (7) of the engine part (6), the gasket (10) ( 29) is sandwiched.
The gasket (10) is a gasket near the bolt head (9), and the gasket (29) is a gasket near the engine component (6).
The eye joint (1) is made of aluminum die casting. The hollow bolt (2) and the gaskets (10) and (29) are made of iron. Both gaskets (10) and (29) may be made of copper.

As shown in FIGS. 1 (A) and 1 (G), the gasket (10) is provided with anti-rotation means (11), and the bolt head (9) of the rotating hollow bolt (2) is rotated when the hollow bolt (2) is tightened. ) Is configured to be prevented from rotating with respect to the ring portion (3) of the eye joint (1) by the rotation stopping means (11).
To tighten the hollow bolt (2), turn the ring (3) of the eye joint (1) with a wrench or the like and tighten the hollow bolt (2) with a wrench.

As shown in FIG. 1 (G), the detent means (11) comprises a tongue piece (12) led out radially from the peripheral edge of the gasket (10), and rotates when the hollow bolt (2) is tightened. The rotating lower side edge (12a) of the tongue (12) of the gasket (10) to be rotated by the bolt head (9) of the hollow bolt (2) is the ring part (3) of the eye joint (1). ) And the gasket (10) is configured to be prevented from rotating with respect to the ring portion (3) of the eye joint (1).
The tongue piece (12) is formed in a rectangular shape and is led out from the outer peripheral edge of the gasket (10) in the outward radial direction. The rotating lower side edge (12a) is formed in the radial direction of the gasket (10). It is growing.

The joint of 2nd-5th embodiment group is demonstrated.
2 (A)-(H) to FIG. 5 (A)-(C), only the gasket (10) used in the joints of the second to fifth embodiments is shown. Elements other than the gasket (10) used in the second to fifth embodiment groups have the same shape and structure as the elements of the first embodiment shown in FIGS.

As shown in FIGS. 2 (A)-(H), the gasket (10) used in the second embodiment group has a tongue piece (12) having a shape different from that of the first embodiment as a detent means (11). ) Is used.
In the basic example shown in FIGS. 2A and 2B, the tongue piece 12 is formed in a claw shape, and only one piece is led out from the outer peripheral edge of the gasket 10 in the outward radial direction. (12a) extends in the radial direction of the gasket (10).
2 (C) and 2 (D), two same tongue pieces (12) as in the basic example are derived from the outer peripheral edge of the gasket (10) in the outward radial direction with a phase difference of 180 °. In the second modification of FIGS. 2E and 2F, four tongue pieces 12 that are the same as the basic example are derived with a phase difference of 90 °, and in the third modification of FIGS. Twelve tongue pieces (12) that are the same as the basic example are derived with a phase difference of 30 °.

As shown in FIGS. 3 (A)-(D), in the gasket (10) used in the third embodiment group, the detent means (11) is connected to the ring of the eye joint (1) from the outer peripheral edge of the gasket (10). The protrusion (13) led out toward the part (3) is formed by the gasket (10) with the tightening pressure of the hollow bolt (2) when the hollow bolt (2) shown in FIG. The protrusion (13) bites into the ring part (3) of the eye joint (1) and the gasket (10) is configured to be prevented from rotating with respect to the ring part (3) of the eye joint (1). In the basic example of FIGS. 3A and 3B, the protrusion 13 is formed continuously around the entire outer periphery of the gasket 10, and in the modified examples of FIGS. 10) is formed intermittently at four locations with a phase difference of 90 ° on the outer peripheral edge.

As shown in FIGS. 4 (A)-(F), in the gasket (10) used in the fourth embodiment group, the detent means (11) is connected to the ring portion of the eye joint (1) from the surface of the gasket (10). (3) It is comprised by the rotation stop surface (15) of the annular bead (14) which protrudes toward (3), and a rotation stop surface (15) makes a part of peripheral surface of an annular bead (14) an annular bead (14 ) Around the annular bead of the gasket (10) which is formed by retreating in the inside and is about to be rotated by the bolt head (9) of the rotating hollow bolt (2) when the hollow bolt (2) is tightened. The stop surface (15) bites into the surface of the ring part (3) of the eye joint (1) so that the gasket (10) is prevented from rotating with respect to the ring part (3).
In the basic example of FIGS. 4 (A), (B), and (C), the detent surface (15) is formed as a flat surface at two locations on the annular bead (14) with a phase difference of 180 °. In the modified examples of D), (E), and (F), the detent surface (15) is formed as an arc-shaped recessed surface at one location of the annular bead (14).

As shown in FIGS. 5 (A)-(C), in the gasket (10) used in the fifth embodiment, the anti-rotation means (11) is shown in FIG. 1 (A) from the surface of the gasket (10). It is composed of a protrusion (16) projecting toward the ring part (3) of (1) and a rubber elastic seal layer (17) provided on the surface of the gasket (10), and is shown in FIG. When the bolt (2) is tightened, the protrusion (16) of the gasket (10) bites into the ring part (3) of the eye joint (1) with the tightening pressure of the hollow bolt (2) and the eye joint (1 The rubber elastic seal layer (17) is pressed against the ring portion (3) of the gasket (10) so that the gasket (10) is prevented from rotating with respect to the ring portion (3) of the eye joint (1). In addition, the rubber elastic seal layer (17) is used for the gasket (10) and the ring (3) of the eye joint (1). Is configured to seal is made between.
As shown in FIG. 5 (A), the protrusion (16) has a phase difference of 90 °, and is formed by half-piercing at four locations on the gasket (10). The rubber elastic seal layer (17) is formed by the gasket (10). Are formed on the surface of the eye joint (1) on the ring part (3) side. Another rubber elastic seal layer (18) is formed on the surface of the hollow bolt (2) on the bolt head (9) side of both surfaces of the gasket (10).

As shown in FIGS. 6 (A)-(F), in the gasket (10) used in the sixth embodiment, instead of the gasket (10) having the detent means (11), rubber elasticity is provided. The gasket (10) provided is baked and fixed on the end face of the ring part (3) of the eye joint (1), and the bolt head (9) of the rotating hollow bolt (2) is tightened when the hollow bolt (2) is tightened. The gasket (10) to be rotated is locked to the ring part (3) of the eye joint (1).
A gasket (29) having rubber elasticity is also baked and fixed to the other end surface of the ring portion (3) of the eye joint (1).

In the usage example 1 shown to FIG. 7 (A) (B), the coupling of 1st Embodiment is used as a coupling for fuel piping of the fuel injection pump (33) of a diesel engine.
The fuel injection pump (33) accommodates a sleeve (35) rotatably in a pump housing (34), and a plunger (36) slidably accommodated in the sleeve (35). A fuel reservoir (37) is provided in the periphery, a communication hole (38) is provided in the peripheral wall of the sleeve (35), and the inside of the sleeve (35) and the fuel reservoir (37) are communicated with each other through the communication hole (38). 37) and the fuel inlet (39) are communicated, the hollow bolt (2) of the joint of the first embodiment is screwed to the fuel inlet (39), and the eye joint (1) is connected to the wall of the pump housing (34). (8) is fixed.
Joints of the second to fifth embodiments in which the gasket (10) shown in FIGS. 2 (A)-(H) to FIGS. 5 (A)-(C) is used, and the joints shown in FIGS. 6 (A)-(F). The joint according to the sixth embodiment can also be used as a fuel pipe joint of a fuel injection pump (33) of a diesel engine.

In the usage example 2 shown to FIG. 8 (A), the joint of 1st Embodiment shown to FIG. 1 (A)-(G) is used as a joint for fuel piping of the fuel filter (31) of a diesel engine.
This fuel filter (31) has a filter element (41) attached to a filter mounting seat (40), the filter element (41) is covered with a filter case (42), and a fuel outlet (in the center of the filter mounting seat (40)) ( 43), the hollow bolt (2) of the joint of the first embodiment is screwed to fix the eye joint (1) to the wall (8) of the filter mounting seat (40).
Joints of the second to fifth embodiments in which the gasket (10) shown in FIGS. 2 (A)-(H) to FIGS. 5 (A)-(C) is used, and shown in FIGS. 6 (A)-(F). The joint of the sixth embodiment can also be used as a joint for fuel piping of a fuel filter (31) of a diesel engine.

  First to second couplings according to the first embodiment shown in FIGS. 1 (A) to 1 (G) and gaskets (10) shown in FIGS. 2 (A) to (H) to FIGS. 5 (A) to (C) are used. The joint of 5th Embodiment, the joint of 6th Embodiment shown to FIG. 6 (A)-(F) is a joint for lubricating oil piping of the supercharger bearing part of a diesel engine, and a joint for EGR piping of the intake passage of a diesel engine It can also be used as a joint for cooling water piping of a cylinder block of a diesel engine.

(1) Eye joint
(2) Hollow bolt
(3) Ring part
(4) Outer wall
(5) Pipe section
(6) Engine parts
(7) Wall
(8) Bolt hole
(9) Bolt head
(10) Gasket
(11) Non-rotating means
(12) Tongue piece
(12a) Rotating lower side edge
(13) Protrusion
(14) Toroidal beads
(15) Anti-rotation surface
(16) Protrusion
(17) Rubber elastic sealing layer

Claims (6)

An eye joint (1), a hollow bolt (2) and an annular gasket (10);
The eye joint (1) is constructed by projecting a pipe part (5) from the outer peripheral wall (4) of the ring part (3),
A hollow bolt (2) is inserted through the center of the ring part (3), and the hollow bolt (2) is screwed into a bolt hole (8) provided in the wall (7) of the engine component (6). In the joint for engine piping, in which the gasket (10) is disposed between the bolt head (9) of (2) and the ring part (3) of the eye joint (1),
The gasket (10) is provided with a detent means (11), and when the hollow bolt (2) is tightened, the gasket (10) to be rotated by the bolt head (9) of the rotating hollow bolt (2) is provided. A joint for piping of an engine, characterized in that the anti-rotation means (11) is configured to prevent rotation with respect to the ring portion (3) of the eye joint (1). The detent means (11) comprises a tongue piece (12) led out radially from the periphery of the gasket (10),
When the hollow bolt (2) is tightened, the rotating lower edge (12a) of the tongue piece (12) of the gasket (10) which is about to be rotated by the bolt head (9) of the rotating hollow bolt (2) Is configured to bite into the surface of the ring part (3) of the eye joint (1) and the gasket (10) is prevented from rotating with respect to the ring part (3) of the eye joint (1). A characteristic joint for engine piping. The joint for engine piping according to claim 1,
The detent means (11) is constituted by a protrusion (13) led out from the outer peripheral edge of the gasket (10) toward the ring part (3) of the eye joint (1),
When the hollow bolt (2) is tightened, the protrusion (13) of the gasket (10) bites into the ring part (3) of the eye joint (1) by the tightening pressure of the hollow bolt (2), and the gasket (10 ) Is configured to be prevented from rotating with respect to the ring portion (3) of the eye joint (1). The joint for engine piping according to claim 1,
The anti-rotation means (11) is composed of an anti-rotation surface (15) of an annular bead (14) protruding from the surface of the gasket (10) toward the ring part (3) of the eye joint (1). (15) is formed by retreating a part of the circumferential surface of the annular bead (14) into the annular bead (14);
When the hollow bolt (2) is tightened, the non-rotating surface (15) of the annular bead of the gasket (10) that is to be rotated by the bolt head (9) of the rotating hollow bolt (2) is the eye joint ( An engine piping joint, wherein the gasket (10) is configured to bite into the ring part (3) of 1) and prevent the gasket (10) from rotating relative to the ring part (3). The joint for engine piping according to claim 1,
Non-rotating means (11) protrudes from the surface of the gasket (10) toward the ring part (3) of the eye joint (1), and a rubber elastic seal layer provided on the surface of the gasket (10) (17) and
When the hollow bolt (2) is tightened, the protrusion (16) of the gasket (10) bites into the ring part (3) of the eye joint (1) by the tightening pressure of the hollow bolt (2) and the eye joint ( The rubber elastic seal layer (17) is pressed against the ring part (3) of 1) so that the gasket (10) is prevented from rotating with respect to the ring part (3) of the eye joint (1). As well as
A joint for piping of an engine, characterized in that the rubber elastic seal layer (17) is configured to seal between the gasket (10) and the ring portion (3) of the eye joint (1). The joint for engine piping according to claim 1,
Instead of the gasket (10) having a detent means (11),
A gasket (10) having rubber elasticity is baked and fixed to the end face of the ring part (3) of the eye joint (1).
When the hollow bolt (2) is tightened, the gasket (10) that is about to be rotated by the bolt head (9) of the rotating hollow bolt (2) is prevented from rotating around the ring (3) of the eye joint (1). It is comprised so that it may be, The coupling for piping of an engine characterized by the above-mentioned.

Images