JP3318890B2 - Muffler attachment for both public roads and stadiums - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler attachment which can be applied to both general road driving and circuit / stadium driving of an automobile.

[0002]

2. Description of the Related Art Conventionally, in order to generate exhaust explosion noise when driving on a circuit or a stadium, a muffler of a standard type installed on a general public road is removed and replaced with a muffler for competition. Was being done. However, replacement at the site is an extremely troublesome task, and it is uneconomical to prepare separate mufflers.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and functions as an ordinary muffler in conformity with security standards on general public roads. An object of the present invention is to provide a muffler attachment for both a public road and a stadium, which can be instantaneously switched to a competition with the muffler attached (without replacement).

[0004]

To achieve the above object, the present invention relates to a muffler-3 connected to an outer end flange 2 of an exhaust pipe 1 of a vehicle body via a mounting flange 4 as shown in FIG. A muffler for both a public road and an athletic field, comprising a detachable insertion pipe 7 which is inserted into the muffler pipe 5 of the muffler 3 and cuts off the punching mesh 6 of the muffler pipe 5 to directly communicate with the exhaust pipe 1. Attachment.

[0005] In the above configuration, as shown in FIG. 2, the insertion pipe 7 is attached and detached when the abutting portion 5 a provided at the protruding end of the muffling pipe 5 and the abutting portion 7 a provided at the corresponding portion of the insertion pipe 7 are abutted. 2 is a muffler attachment for both a public road and an athletic field, which is carried out through a fastening bolt 8.

[0006]

Since the present invention is constructed as described above, on a general public road, the muffler-3 (that is, the installation muffler-3) is connected to the outer end flange 2 of the exhaust pipe 1 of the vehicle body via the mounting flange 4. After running on a standard muffler (FIG. 5) and approaching the stadium, the insertion pipe 7 is connected to the muffler.
(FIG. 4). Then, as shown in FIG. 4, the punching mesh 6 of the silencing pipe 5 is cut off by the outer wall of the inserting pipe 7, and the inserting pipe 7 and the exhaust pipe 1 are directly connected. Released directly to the outside.

The inserted insertion pipe 7 is inserted through the fastening bolt 8 in a state in which the abutting portion 5a provided at the protruding end of the silencing pipe 5 and the abutting portion 7a provided at a portion corresponding to the inserting pipe 7 abut against each other. By doing so, there is no danger of falling off during traveling. When the insertion pipe 7 is not used, it is stored in a trunk or the like.

[0008]

As described above, the present invention provides a single muffler.
By simply attaching the insertion pipe 7 to the base 3, it is possible to perform the dual role of running on a public road and running on a stadium. The insertion and removal of the insertion pipe 7 can be performed with a single touch via the tightening bolt 8. Since the structure of the muffler-3 itself is not significantly changed and only the insertion pipe 7 is added as an attachment, the production cost can be relatively low.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes an exhaust pipe of a vehicle body, and reference numeral 3 denotes a muffler connected to an outer end flange 2 of the exhaust pipe through a mounting flange 4. 7 is the muffler-3
The pipe is made of stainless steel and is inserted into the muffling pipe 5 to block the punching mesh 6 of the muffling pipe 5 and to directly communicate with the exhaust pipe 1. And FIG.
As shown in FIG. 3, a contact portion 7a provided at a corresponding portion of the insertion pipe 7 to a contact portion 5a provided at a projecting end of the silencing pipe 5.
In the state where a is abutted, it is tightened and fixed via the tightening bolt 8. To remove the insertion pipe 7, the fastening bolt 8 is loosened and inserted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which an insertion pipe 7 is removed.

FIG. 2 is a longitudinal sectional side view in a state where an insertion pipe 7 is inserted.

FIG. 3 is a plan view of the same.

FIG. 4 is a longitudinal sectional side view of a main part in a running state of a stadium.

FIG. 5 is a longitudinal sectional side view of a main part in a general public road driving state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exhaust pipe 2 Outer end flange 3 Muffler 4 Mounting flange 5 Silencer pipe 5a Butt contact part 6 Punching mesh 7 Insertion pipe 7a Butt part 8 Tightening bolt 9 Silencer

Claims (3)

(57) [Claims] 1. A muffler (3) connected to an outer end flange (2) of an exhaust pipe (1) of a vehicle body via a mounting flange (4), and a muffler pipe (5) for the muffler (3). A muffler attachment for both public roads and stadiums, comprising a detachable insertion pipe (7) which is inserted into the muffler pipe (5) and cuts off the punching mesh (6) of the muffler pipe (5) to directly communicate with the exhaust pipe (1). . 2. The mounting and dismounting of the insertion pipe (7) is performed by abutment of a butting portion (5a) provided at a protruding end of the silencing pipe (5) and a butting portion (7a) provided at a corresponding portion of the insertion pipe (7). 2. The muffler attachment according to claim 1, wherein the muffler is mounted on a public road and a stadium in a state. 3. The muffler attachment according to claim 1, wherein the insertion pipe (7) is made of stainless steel.