JP2012083205A - Attachment for collecting exhaust gas and detachment method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment for collecting exhaust gas that is easy to handle and does not damage a muffler.
An exhaust gas collecting attachment 1 for collecting exhaust gas discharged from a muffler 6 of a vehicle, which is formed in a substantially conical shape from one end of a large diameter portion 2a and the other end of a small diameter portion 2b. A hollow elastic member 2 and a collecting pipe 3 into which the tip 3a is inserted from the large-diameter portion 2a of the elastic member 2 and the tip 3a is fitted to the small-diameter portion 2b without a gap are provided. The distal end portion 3a of the collection pipe 3 is fitted into the small diameter portion 2b without a gap without protruding from the small diameter portion 2b of the elastic member 2. The elastic member 2 is formed of a heat resistant rubber material.
[Selection] Figure 2

Description

  The present invention relates to an attachment for collecting exhaust gas for collecting exhaust gas discharged from a muffler of a vehicle, and a method for attaching and detaching the attachment.

  Conventionally, as an attachment for collecting exhaust gas by mounting on a muffler of a vehicle, as shown in FIG. 4, a solid rubber member 100 having a tapered side surface and a center of the rubber member 100 are provided. A collecting pipe 101 fitted in the through-hole with no gap and a clamping means 102 attached to the collecting pipe 101. After inserting and fitting the rubber member 100 into the muffler 103, the clamping means 102 and the rubber It is known that the muffler 103 is sandwiched between the members 100 and attached to the muffler 103.

In addition, as described in Patent Document 1, the main body portion is made of a flexible heat-resistant material, and an opening for fitting the outer wall surface of a two-wheeled vehicle muffler provided with an exhaust port at the tip is formed. An exhaust gas collecting adapter for a two-wheeled vehicle is known in which a hole for fitting a tip end portion of an exhaust gas collecting probe is provided at the rear end portion, and the vicinity of the opening portion of the main body portion is secured with a clip.

Japanese Patent Laid-Open No. 11-201878

However, the attachment comprising the solid rubber member 100, the collection pipe 101, and the clamp means 102 is heavy because it includes the solid rubber member 100 and the clamp means 102, and is attached to and removed from the muffler 103. The burden on workers is large. In addition, since the collection pipe 101 protrudes from the rubber member 100, there is a problem that the muffler 103 is damaged when attached to the muffler 103. Furthermore, since the structure is provided with the clamping means 102, it cannot cope with the muffler 103 having different inner diameters, and an attachment must be prepared for each model.

  The technique described in Patent Document 1 cannot be applied to an automobile in which the muffler does not protrude from the vehicle body because the main body cannot wrap the outer wall surface of the muffler.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is an attachment for collecting exhaust gas that is easy to handle and does not damage the muffler. And a method for attaching and detaching the same.

In order to solve the above-mentioned problem, the invention according to claim 1 is an exhaust gas collecting attachment for collecting exhaust gas discharged from a muffler of a vehicle, comprising: one end of a large diameter portion and the other end of a small diameter portion. A hollow elastic member formed in a substantially conical shape, and a collecting pipe into which a distal end portion is inserted from a large diameter portion of the elastic member and the distal end portion is fitted to the small diameter portion without a gap are provided.

  The tip of the collecting pipe can be fitted to the small diameter portion without any gap without protruding from the small diameter portion of the elastic member. The elastic member can be formed of a heat resistant rubber material.

The invention according to claim 4 is a method for attaching and detaching the exhaust gas collection attachment according to any one of claims 1 to 3 to the muffler, and when attaching the exhaust gas collection attachment to the muffler, an elastic member After inserting the small diameter part of the muffler into the muffler and pushing it, the elastic member is further pressed and twisted into the muffler, and when removing the exhaust gas collection attachment from the muffler, the elastic member is untwisted and pulled out from the muffler Is.

According to the invention which concerns on Claim 1, since weight reduction can be achieved by using a hollow elastic member, the burden on an operator is reduced and workability | operativity improves. Further, since the hollow elastic member formed in a substantially conical shape is deformed while being in close contact with the muffler when attached to the muffler, it is possible to cope with all models and reduce the cost.

In addition, if the tip of the collection pipe is fitted to the small diameter part without protruding from the small diameter part of the elastic member, the collection pipe will not damage the muffler when it is attached to the muffler. Can be prevented in advance. Further, if the elastic member is formed of a heat resistant rubber material, durability can be improved.

  According to the invention which concerns on Claim 4, when attaching the attachment for exhaust gas collection to a muffler, after inserting and abutting the small diameter part of an elastic member in a muffler, while pressing an elastic member further in a muffler, Since it is sufficient to twist, the attachment for collecting exhaust gas can be easily attached to the muffler. On the other hand, when the exhaust gas collection attachment is removed from the muffler, the exhaust member can be easily detached from the muffler because the elastic member is twisted and pulled out from the muffler.

Side view of the cross section of the main part of the attachment for collecting exhaust gas according to the present invention Action explanation applied to a straight pipe muffler Action explanation diagram applied to the muffler of the curved pipe Side view of the main part of a conventional exhaust gas collection attachment

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the exhaust gas collecting attachment 1 according to the present invention includes a hollow elastic member 2 formed in a substantially conical shape from one end of a large diameter portion 2a and the other end of a small diameter portion 2b. A tip 3a is inserted from the large-diameter portion 2a of the member 2, and the tip 3a is provided with a collecting pipe 3 that fits with the small-diameter portion 2b without a gap.

  Moreover, the front-end | tip part 3a of the collection pipe 3 is fitted into the small diameter part 2b without a gap without protruding from the small diameter part 2b of the elastic member 2. The tip portion 3a and the small diameter portion 2b can be joined using an adhesive. Further, the elastic member 2 is formed of a heat-resistant rubber material, and the side portion 2c connecting the large diameter portion 2a and the small diameter portion 2b is formed with a thickness that can exhibit a desired elastic force and rigidity when being attached to and detached from the muffler. .

Further, the rear end portion 3b of the collecting pipe 3 protruding from the large diameter portion 2a of the elastic member 2 is connected to a hose 5 for introducing exhaust gas to an exhaust gas analyzer (not shown) by a rubber joint member 4. . By such a rubber joint member 4, the exhaust gas collecting attachment 1 is twistably connected to the hose 5.

An operation of the exhaust gas collecting attachment 1 according to the present invention configured as described above and a method for attaching and detaching the same will be described. When attaching the exhaust gas collecting attachment 1 to the straight pipe muffler 6, as shown in FIG. 2, the operator first holds the joint member 4, and the elastic member 2 has the small diameter portion 2 b and the side portion 2 c of the muffler. Insert into the muffler 6 until it hits 6.

Next, the elastic member 2 is pressed toward the inside of the muffler 6, and the collection pipe 3 side of the joint member 4 is gripped and twisted leftward or rightward with the collection pipe 3 as a center. Then, due to the twisting of the elastic member 2 made of rubber, the side portion 2c is firmly adhered to the muffler 6 while being elastically deformed. The exhaust gas collecting attachment 1 is easily attached to the muffler 6 without a gap by the elastic force accompanying the twisting of the elastic member 2.

  On the other hand, when the exhaust gas collecting attachment 1 is removed from the muffler 6, after the elastic member 2 is gripped and the elastic member 2 is untwisted, the elastic member 2 is pulled out from the muffler 6, and the exhaust gas collecting attachment 1 is removed. 1 can be easily removed from the muffler 6.

Here, since the collection pipe 3 and the hose 5 are connected by the rubber joint member 4, the resistance of the hose 5 to the twist of the elastic member 2 is alleviated. Therefore, the twisting operation of the elastic member 2 can be performed smoothly.

Thus, by the twisting operation of the hollow elastic member 2 formed in a substantially conical shape, the exhaust gas collecting attachment 1 can be easily attached to and detached from the muffler 6 without requiring a conventional clamping means.

  Further, as shown in FIG. 3, the exhaust gas collecting attachment 1 is inserted into the muffler 7 until the side portion 2 c hits the muffler 7 and the elastic member 2 is twisted to form the muffler 7. Since it can be attached, it can correspond to the muffler 7 of such a curved pipe.

According to the present invention, it is possible to provide an attachment for collecting exhaust gas that can be easily attached to and detached from the muffler and that does not damage the muffler when attaching and detaching, and a method for attaching and detaching the attachment. I can plan.

DESCRIPTION OF SYMBOLS 1 ... Attachment for exhaust gas collection, 2 ... Elastic member, 2a ... Large diameter part, 2b ... Small diameter part, 2c ... Side part, 3 ... Collection pipe, 3a ... Tip part, 3b ... Rear end part, 4 ... Joint member 5 ... hose, 6 ... straight pipe muffler, 7 ... curved pipe muffler.

Claims (4)

An exhaust gas collecting attachment for collecting exhaust gas discharged from a vehicle muffler, a hollow elastic member formed in a substantially conical shape from one end of a large diameter portion and the other end of a small diameter portion, An exhaust gas collecting attachment, comprising a collection pipe into which a distal end portion is inserted from a large diameter portion of an elastic member, and the distal end portion is fitted to the small diameter portion without a gap. The exhaust gas collection attachment according to claim 1, wherein a tip end portion of the collection pipe is fitted into the small diameter portion without a gap without protruding from the small diameter portion of the elastic member. Attachment for. The exhaust gas collection attachment according to claim 1 or 2, wherein the elastic member is made of a heat-resistant rubber material. A method for attaching and detaching an exhaust gas collection attachment according to any one of claims 1 to 3, wherein when attaching the exhaust gas collection attachment to the muffler, a small diameter portion of an elastic member is inserted into the muffler. Then, the elastic member is further pressed and twisted into the muffler, and when the exhaust gas collection attachment is removed from the muffler, the elastic member is untwisted and pulled out from the muffler. How to attach and detach attachments.

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