JP3448668B2 - Repair device for exhaust stack of internal combustion engine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair device for an exhaust stack of an internal combustion engine.

[0002]

2. Description of the Related Art FIG. 9 shows a conventional repair device of this type. The figure shows an example in which the repair device A is used to prevent exhaust leakage from a locally damaged portion of an exhaust box 2 provided in an exhaust stack 1 of an internal combustion engine for an automobile.

In this conventional apparatus, a belt-shaped winding member 3 made of stainless steel having a heat-resistant gasket layer 4 formed of compressed asbestos fiber or the like laminated on the back surface, and a winding member 3 wound around an exhaust box 2 are exhausted. It has a tightening mechanism 5 for tightening against the box 2. The tightening mechanism 5 includes a locking member 6 fixed to one end of the winding member 3 by welding, and a locking member 7 fixed to a position near the other end of the winding member 3 by welding.
And a band member 8 locked to one locking member 6 and a tightening member 9 locked to the other locking member 7. Then, with the band member 8 inserted in the guide portion 9a of the tightening member 9, the tightening screw 9 attached to the tightening member 9 is inserted.
By rotating b, the strip 8 is guided by the guide portion 9a.
The wrapping member 3 is drawn into the exhaust box 2 and is fastened to the exhaust box 2.

According to this repairing device A, since the wrapping member 3 is fastened to the exhaust box 2 by the action of the tightening mechanism 5, the heat-resistant gasket layer 4 of the wrapping member 3 hermetically seals the damaged portion of the exhaust box 2. It is said that it is possible to prevent exhaust leaks by blocking it at the top.

[0005]

However, in the conventional repair device described with reference to FIG. 9, the tightening mechanism 5 has two locking members 6, 7, a band member 8 and a tightening member 9. The engaging portion 6 is composed of four parts and has a complicated shape for the locking members 6 and 7 to lock the strip 8 and the fastening member 9.
Since it is necessary to weld the locking members 6 and 7 to the wrapping member 3 as well as having the a and 7a,
There is a problem that the structure is complicated and the assembly is complicated and the cost is high. Further, there is a possibility that the engaging portion between the band member 8 and the engaging member 6 or the engaging portion between the tightening member 9 and the engaging member 7 may be deformed afterwards due to the influence of the tightening force. If the engaging portion is deformed, the tightening force may be loosened, and the exhaust gas may leak from the damaged portion. Furthermore, since the two locking members 6 and 7 are joined to the winding member 3 by welding, it is necessary to determine the welding joining points of the locking members 6 and 7 according to the outer diameter of the exhaust box to be mounted. For this reason, there is an inconvenience that a repair device dedicated to the exhaust boxes having different outer diameters is required individually.

The present invention has been made in view of the above problems and circumstances, and takes measures so that the number of parts for forming a tightening mechanism is small and the shape of each part is simpler than before. It is therefore an object of the present invention to provide a repair device for an internal combustion engine exhaust stack, the cost of which can be kept low.

Further, according to the present invention, although the price can be kept low, an exhaust pipe repairing device for an internal combustion engine is not likely to cause exhaust leakage due to a loose tightening force after the exhaust pipe is mounted. The purpose is to provide.

A further object of the present invention is to provide a repair device for an exhaust stack of an internal combustion engine which can be commonly used for exhaust boxes having different outer diameters.

[0009]

A device for repairing an exhaust pipe of an internal combustion engine according to the present invention comprises a metal band-shaped wrapping member having a heat resistant sealing material laminated on the back surface thereof, and a damaged portion of the exhaust pipe having the sealing member described above. And a tightening mechanism that tightens the winding member wound around the exhaust pipe so as to cover the exhaust pipe. This point is similar to the conventional example.

In the present invention, the above-mentioned tightening mechanism is provided with a band member having engaging grooves to be engaged with the thread of the tightening screw at a plurality of positions at equal pitches in the length direction, and the band member can be moved back and forth. And a tightening member provided with the above-mentioned tightening screw to be engaged with the engaging groove of the band member inserted into the guide, and can be connected to an arbitrary position of the winding member. And a connecting tool. The band member connected to the connecting tool is inserted into the guide portion of the tightening member connected to the end of the winding member, and the engaging groove is engaged with the thread of the tightening screw. In this state, by rotating the tightening screw, the band member can be drawn into the guide portion.

According to this, the tightening mechanism can be composed of three parts, that is, the band member, the tightening member, and the connecting tool. Therefore, the number of parts is smaller than that of the conventional example, and the assembling is performed accordingly. Is also easier, which helps keep prices low. Further, since the connecting tool can be connected to an arbitrary position of the winding member, it is possible to arbitrarily adjust the connecting position of the connecting tool with respect to the winding member. It is possible to increase / decrease and adjust and to apply a sufficiently large tightening force to the winding member.

In the present invention, the connecting member is provided with a slit-shaped opening through which the winding member can be inserted, and the winding member inserted into the opening is bent so that the bent portion is located at the opening edge of the opening. It is possible to employ a configuration in which the coupling tool and the wrapping member are coupled by non-sliding engagement, and by doing so, welding or the like to the means for coupling the coupling tool and the wrapping member. Not only is it unnecessary to employ the troublesome means described above, but also it is not necessary to use a special component for connecting the two, so that the price can be further reduced.

In the present invention, it is desirable that the fastening member is connected to the end of the winding member by welding them. According to this, the repairing worker can handle the winding member and the tightening member as one component, and the work can be easily performed.

According to the present invention, the connecting member is provided with an engaging hole, and the connecting member and the band member are connected by bending the base portion of the band member inserted into the engaging hole into a folded shape. At the same time, it is preferable that a bending piece formed by bending the base portion of the band member be sandwiched by the winding member and the connecting tool inserted into the opening. According to this, it is not necessary to use an extra part for connecting the connecting tool and the band, and not only the price can be kept low, but also the bent piece of the band is inserted into the opening of the connecting tool. Since it is sandwiched between the winding member and the connecting tool, the situation in which the band member slips out from the engaging hole of the connecting tool and the tightening force is loosened after the repair device is attached to the exhaust pipe will not occur. Therefore, there is no possibility of exhaust leakage due to loose tightening force after mounting.

[0015]

1 to 3 are explanatory views showing a procedure of mounting a repair device according to the present invention on an exhaust pipe of an internal combustion engine, and FIG. 4 shows a procedure of connecting a connecting member to a winding member. It is explanatory drawing shown by the expanded sectional view of FIG. 5 to 8 show a modification of the connecting tool 71.

This embodiment relates to a repair device mounted on an internal combustion engine exhaust stack 10 for an automobile or a motorbike, and in FIGS. 1 to 3, the exhaust stack 11 of the exhaust stack 10 is shown in FIGS.
It shows the case of repairing the damaged parts such as holes and cracks existing in.

This repairing device comprises a strip-shaped winding member 20 made of stainless steel and a tightening mechanism 50. Figure 4 (A)
As shown in (B), the winding member 20 has a heat-resistant seal material 21 formed on its back surface with compressed asbestos fibers or the like.
Are laminated. The tightening mechanism 50 is a strip member 51 in which long engagement grooves 52 are formed in the width direction at a plurality of positions on the surface of a stainless steel strip at regular pitches in the length direction.
A fastening member 61 that rotatably includes a guide portion 62 and a fastening screw 63 that allow the band material 51 to be inserted and removed, and a coupling that includes a slit-shaped opening 72 elongated in the width direction and an engagement hole 73. It consists of three parts, the tool 71.

In order to repair the exhaust stack 10 using this repairing device, the strip 51 and the connecting member 71, the connecting member 71 and the winding member 20, and the tightening member 61 and the winding member 20 are connected to each other. Need to

The connection between the tightening member 61 and the winding member 20 is
A joining piece 64 is integrally formed on the fastening member 61 in advance, and the joining piece 64 is joined to the central portion of one side end of the winding member 20 by welding as shown in FIG. 1. Is possible. Since such a connecting work between the tightening member 61 and the winding member 20 involves a troublesome work such as welding, it is desirable to provide the joined parts in advance.

For connecting the band member 51 and the connecting tool 71,
After inserting the base portion of the band member 51 into the engagement hole 73 of the coupling tool 71, the bent piece 53 is formed by bending it in a folded shape, and the bent piece 53 is locked to the edge of the engagement hole 73. In addition to adopting the procedure of making
It is possible to adopt a procedure in which a folded-back bent piece 53 is formed in advance on the base of the above, and the bent piece 53 is inserted into the engaging hole 73 and locked at the hole edge. In addition, the work of connecting the band member 51 and the connecting tool 71 is performed by the exhaust stack 10.
The repair work may be performed at the same time, or a product in which the both are connected may be provided in advance.

The connecting work between the connecting member 71 and the winding member 20 is performed by inserting the other end of the winding member 20 through the slit-shaped opening 72 of the connecting member 71 as shown by the arrow a in FIG. The tool 71 is slid in the longitudinal direction of the wrapping member 20 to be aligned with the proper position as shown in FIG. 4 (A), and then the connecting tool 71 is attached to the wrapping member 20 with an arrow as shown in FIG. 4 (B). Make it fall toward the other end as shown in b. In this way, the opening edges 72a and 72b on both sides of the opening 72 press the winding member 20 in opposite directions, so that the winding member 20
Is bent, and the bent points 25a and 25b are opened 7
The connecting tool 71 and the wrapping member 20 are connected by non-slidingly engaging with the two opening edges 72a and 72b. The work of connecting the connecting tool 71 and the wrapping member 20 in this manner is performed even after the wrapping member 20 is loosely and roughly wound around the repair portion of the exhaust box 11 of the exhaust stack 10 as shown in FIG. Although it may be performed before such rough winding, if it is performed after the winding member 20 is loosely roughly wound around the repair portion of the exhaust box 11, the winding member 20 is connected in the longitudinal direction. There is an advantage that the work for appropriately determining the connecting position of the tool 71 can be easily performed.

Here, the strip material 51 connected to the connecting tool 71.
It is desirable that the bent piece 53 and the other end of the wrapping member 20 inserted into the opening 72 of the connecting tool 71 are arranged on the back surface side of the connecting tool 71. This point will be described later.

After the winding member 20 is roughly wound around the exhaust box 11 of the exhaust stack 10, the strip 51 is inserted into the guide portion 62 of the fastening member 61 as shown by an arrow c in FIG. The predetermined engaging groove 52 of the fastening member 51 is fitted with the fastening screw 6 of the fastening member 61.
3 is engaged with the thread (not shown), and the tightening screw 63 is rotated in the tightening direction from that state. By doing so, the threads of the tightening screw 63 are successively engaged with the other engaging grooves 52 of the strip 51, and the strip 51 is drawn into the guide portion 62. At this time, if the other end 20b of the wrapping member 20 is arranged so as to slip into the lower side of the one end 20a of the wrapping member 20, the strip 51 is drawn into the guide portion 62, whereby the wrapping member 20 is drawn. The other end 20b of the same goes into the lower side of the one end 20a as shown by the arrow d, the winding member 20 is fastened to the exhaust box 11, and the sealing material 21 (see FIG. 4) of the exhaust box 11 is attached. Airtightly close the damaged part. This completes the repair work. FIG. 3 shows a state where the repair work has been completed.

In the above description, the repair device according to the embodiment of the present invention is applied to the case where the exhaust box 11 of the exhaust stack 10 has holes or cracks. The same can be applied to the case where holes or cracks are formed in the cylinder 10 other than the exhaust box 11. In addition, it is possible to attach a repair device to the exhaust box 11 having no breakage in the same manner as described above, and in such a case, the exhaust box 11 may be directly rubbed against the ground or the like. Exhaust box 1
This repair device also serves as a protective member for preventing the damage of 1. Therefore, it is useful in terms of protecting the exhaust box 11 for an automobile or a motorbike where the distance between the exhaust box 11 and the ground is short. Further, it is possible to enhance fashionability by using a carbon material or other usable material for the wrapping member 20, and in such a case,
It will be useful as a dress-up part for automobiles and motorbikes.

In this embodiment, the bent piece 53 of the band member 51 connected to the connecting tool 71 and the other end of the wrapping member 20 inserted into the opening 72 of the connecting tool 71 are connected to the connecting tool 71. It is desirable to deploy it on the back side. In this way, when the bending piece 53 and the other end 20b of the winding member 20 are arranged on the back surface side of the connecting tool 71, when the repair device is attached to the exhaust box 11, the strip material 51 is removed. The bent piece 53 is sandwiched by the winding member 20 and the connecting tool 71. for that reason,
The situation in which the bending piece 53 extends due to the force that tightens the winding member 20 does not occur, and the band member 51 is connected to the connecting tool 71.
The situation in which the tightening force is loosened out of the engaging hole 73 does not occur, and the exhaust leakage due to the loosening of the tightening force after mounting does not occur.

5 to 8 show various modifications of the connector 71. The connecting tool 71 of FIGS. 5A and 5B is an example in which a bulging rib 74 is formed and reinforced at a portion between the engagement hole 73 and the opening 72 and an outer portion of the opening 72. Figure 6
In the connector 71 of (A) and (B), the engagement hole is omitted and a welding surface 75 is formed in that portion so that the end of the strip can be connected to the welding surface 75 by welding. The other configurations are the same as those in FIGS. 5A and 5B. The connector 71 of FIGS. 7A and 7B is an example in which the outer edge of the connector 71 is raised to form the rib 76, and other configurations are the same as those of FIGS. 5A and 5B. FIG. 8 (A)
The connector 71 of (B) has a bulged rib 7 formed in a portion between the engagement hole 73 and the opening 72 and an outer portion of the opening 72.
4 is an example in which 4 is extended to the location where the engagement hole 73 is formed. Other configurations are similar to those in FIGS. 5A and 5B.

[0027]

As described above, in the repair device of the present invention, the number of parts for constructing the tightening mechanism is small, and the shape of each part is simpler than the conventional example. Not only can the price be kept low compared to, but even if the outer diameter of the exhaust box of the exhaust stack is different, it is possible to secure a sufficiently large tightening force for the wrapping member wrapped around the exhaust box. It has the advantage of being possible. Also,
It is possible to eliminate the risk of exhaust leakage due to loose tightening force after mounting on the exhaust stack.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first stage of mounting a repair device according to the present invention on an exhaust pipe of an internal combustion engine.

FIG. 2 is an explanatory view showing an intermediate stage of mounting the repair device on an exhaust pipe of an internal combustion engine.

FIG. 3 is an explanatory diagram showing a state in which the repair device is mounted on an exhaust pipe of an internal combustion engine.

FIG. 4 (A) is an explanatory view showing an enlarged cross-sectional view of an essential part of a stage in which the connecting tool is arranged at an appropriate position on the winding member, and FIG. 4 (B) is a diagram showing the connecting member connected to the winding member. It is explanatory drawing which showed the principal part with the expanded sectional view.

FIG. 5 (A) is a front view of a connector according to a modification, (B).
FIG. 7A is an enlarged cross-sectional view taken along line VB-VB of (A).

FIG. 6A is a front view of a connector according to another modification,
(B) is a VIB-VIB line enlarged sectional view of (A).

FIG. 7A is a front view of a connector according to still another modification, and FIG. 7B is an enlarged sectional view taken along line VIIB-VIIB of FIG.

FIG. 8A is a front view of a connector according to still another modification, and FIG. 8B is an enlarged sectional view taken along line VIIIB-VIIIB of FIG.

FIG. 9 is an explanatory diagram of a usage state of a conventional example.

[Explanation of symbols]

10 Exhaust stack 20 Wrapping member 25a, 25b Bent points 21 Seal material 50 tightening mechanism 51 strips 52 engagement groove 53 bent pieces 61 Tightening member 62 Guide 63 Tightening screw 71 Connector 72 openings 72a, 72b Opening edge 73 Engagement hole

Claims (4)

(57) [Claims] 1. A metal strip-shaped wrapping member having a heat-resistant sealing material laminated on the back surface, and the wrapping member wound around the exhaust pipe so that the seal member covers a damaged portion of the exhaust pipe. In a repair device for an internal combustion engine exhaust pipe having a tightening mechanism for tightening against a cylinder, the tightening mechanism has engaging grooves engaged with the threads of a tightening screw at a plurality of positions at regular pitches in the length direction. And a fastening member having a guide portion that can be inserted into and removed from the belt material and the fastening screw that is engaged with the engagement groove of the belt material that is inserted into the guide portion. And a connecting tool that can be connected to an arbitrary position of the winding member, and the guide of the tightening member that connects the strip material connected to the connecting tool to an end of the winding member. State where the engaging groove is engaged with the screw thread of the tightening screw. Repair apparatus for an internal combustion engine exhaust pipe, characterized in that it can now be drawn into the guide portion the strip by rotating the screw tightening. 2. The connecting member is provided with a slit-shaped opening through which the winding member can be inserted, and the winding member inserted through the opening is bent so that the bent portion cannot slide on the opening edge of the opening. The exhaust pipe repair device according to claim 1, wherein the connecting member and the winding member are connected by engaging with each other. 3. A repair device for an internal combustion engine exhaust stack according to claim 1, wherein the fastening member is welded to an end portion of the winding member so that the two members are connected to each other. 4. The coupling tool is provided with an engagement hole, and the coupling tool and the strip material are coupled by bending the base portion of the strip material inserted in the engagement hole into a folded shape. The bending piece formed by bending the base portion of the band member is sandwiched by the winding member and the connector inserted through the opening. An internal-combustion-engine exhaust stack repair device as described above.