JPH0596430U - Engine intake / exhaust pipe mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] A flange that connects the intake and exhaust pipes of the engine.
Prevents the operator from becoming an obstacle and makes it possible to easily check the gasket mounting state. [Structure] In a flange connecting an exhaust pipe 1 of an engine through a metal gasket 2 provided with a convex portion 2a on a part of an outer circumference sandwiched by flanges 3 and 4, a predetermined convex portion that overlaps with the convex portion 2a of the gasket 2 The portion 4a is provided on the side surface of the flange 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a flange for mounting an intake / exhaust pipe of an engine.

[0002]

[Prior Art]

 Gaskets are prevented by installing gaskets on the flanges of the manifolds, etc., which connect the intake and exhaust pipes of the engine. The thin metal gasket used as this gasket has poor visibility because it is often formed in the same color as the surrounding members, and a structure is required to prevent forgetting to assemble it. As disclosed in "NF6TA Engine Parts Catalog" issued by Diesel Sales Co., Ltd. (issued in January 1990), it is known to provide a convex portion on the outer periphery of a gasket so as to project outward from a flange such as a manifold. There is.

As shown in FIG. 3, the metal gasket 2 sandwiched between the flange 3 and the flange 40 is provided with a convex portion 2a protruding outward on a part of the outer periphery of the metal gasket 2 to improve the visibility after assembly. Confirmation is easy.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional structure, since the convex portion 2a of the gasket 2 projects from the outer periphery of the flange 3 and the flange 40, there is a problem that it is easy to catch clothes of an operator.

Therefore, an object of the present invention is to provide a structure for mounting an intake / exhaust pipe of an engine, which is capable of easily checking a gasket while preventing an obstacle to work.

[0006]

[Means for Solving the Problems]

 According to the present invention, the flange connecting the intake and exhaust pipes of the engine through a gasket provided with a convex portion on the outer periphery sandwiched between the first and second flanges is overlapped with the convex portion of the gasket. A predetermined convex portion larger than the convex portion of the gasket is provided on the side surface of the first or second flange.

Further, in a flange that connects an intake and exhaust pipe of an engine through a gasket sandwiched by the first and second flanges, a part of the gasket is provided on at least one side surface of the first or second flange. A predetermined concave portion for exposing is provided.

[0008]

[Action]

 If the gasket is attached, the convex portion of the gasket overlaps the inner side of the convex portion provided on either the first or second flange, so that it is possible to easily confirm the mounting state of the gasket. In addition, since the edge of the gasket does not project, even if an operator touches the gasket, clothes will not be caught.

Further, since the concave portion is provided on at least one side surface of the first or second flange, the gasket appears in the concave portion in a mounted state of the gasket for easy confirmation, and since there is no protruding portion. No clothes get caught.

[0010]

【Example】

 This embodiment shows an example in which the present invention is applied to a flange connected through a metal gasket in an engine exhaust pipe.

As shown in FIG. 1, a thin metal gasket 2 is sandwiched between the flange 3 and the flange 4, and the exhaust pipes 1, 1 are connected while maintaining airtightness.

The metal gasket 2 has a convex portion 2 a on a part of its outer periphery, and the convex portion 2 a is projected from the outer periphery of the flange 3.

On the outer peripheral side surface of the flange 4 from which the convex portion 2a of the metal gasket 2 projects, a convex portion 4a having the same or slightly larger cross-sectional shape as the convex portion 2a is provided, and the end of the convex portion 2a is a convex portion. The protrusions 2a are overlapped without protruding from 4a, and the displacement toward the flange 4 side is restricted.

With the above configuration, the operation will be described.

If the metal gasket 2 is mounted between the flanges 3 and 4, it can be easily confirmed by the convex portion 2a, and the edge of the outer periphery of the convex portion 2a of the gasket 2 is the convex portion 4a. Since it does not project from the inside, the worker's clothes or the like will not come into contact with the metal gasket 2.

FIG. 2 shows another embodiment. Instead of providing the metal gasket 2 of the first embodiment with the convex portion 2a, the side surface of the flange 30 for sandwiching the metal gasket 20 without the convex portion 2a. The semicircular concave portion 3a provided on the upper portion makes it possible to easily confirm the mounted state of the metal gasket 20.

The recess 3a exposes a predetermined range that does not exceed the seal line of the metal gasket 20, and since the flanges 30 and 40 and the metal gasket 20 do not have a protruding portion, the worker's clothes and the like are not caught.

The recess 3a in the second embodiment may be provided on both the flanges 30 and 40.

Further, although an example in which the present invention is applied to the exhaust pipe 1 is shown in the above embodiment, it may be applied to the connection of the intake pipe.

[0020]

[Effect of the device]

 As described above, according to the present invention, since the convex portion provided on the gasket overlaps the inner side that does not project from the convex portion provided on either one of the first and second flanges, the gasket can be easily mounted. This makes it possible to confirm that the worker is less likely to come into contact with the edge of the gasket and thus hinder work.

Further, since the concave portion is provided on at least one side surface of the first or second flange, the mounting state of the gasket can be easily confirmed by the concave portion, and since the gasket and the flange have no protruding portion, the operator can It will not get caught in your clothes and will not interfere with your work.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 2 Metal gasket 2a Convex part 3 Flange 4 Flange 4a Convex part

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Claims (2)

[Scope of utility model registration request] 1. A flange connecting an intake pipe and an exhaust pipe of an engine through a gasket provided with a convex portion on a part of an outer circumference sandwiched between the first and second flanges, at a position where the convex portion of the gasket overlaps with the flange. A mounting structure for an intake / exhaust pipe of an engine, wherein a predetermined convex portion larger than a convex portion of the gasket is provided on a side surface of the first or second flange. 2. A flange connecting an intake pipe and an exhaust pipe of an engine via a gasket sandwiched between first and second flanges, wherein a part of the gasket is provided on at least one side surface of the first or second flange. A structure for mounting an intake / exhaust pipe of an engine, characterized in that a predetermined concave portion for exposing is provided.