JPH0436012A - Method of fixing protector to exhaust pipe for automobile - Google Patents

Abstract

PURPOSE:To reduce the thickness of a band plate to decrease the weight and lower cost by pulling the band plate in the direction of securing a protector at the other end side of a sealing material, and securing a protector to an exhaust pipe by the band plate. CONSTITUTION:After one end part 1a of a band plate 1 is inserted into a sealing material 2, the band plate is wrapped around the outside peripheral surface of a protector 4. When the band plate 1 is strongly pulled at the other end 2b side of the sealing material 2, an engaging part 5 is engaged with one end 2a side of the sealing material 2, and the band plate 1 firmly secures the protector to the exhaust pipe 3. When the sealing material 2 caulked in this state, the band plate 1 is fixed to the sealing material 2. Thereafter, the outside part of the band plate 1 is cut off at the other end 2b side of the sealing material 2. As a result, the protector 4 is completely secured to the exhaust pipe 3. Thus, the band plate has good operating performance even in a narrow space, and it is lightweight and low in cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for fixing a protector for an automobile exhaust pipe.

[Prior Art] Conventionally, methods for fixing a protector to an automobile exhaust pipe include (a) wrapping a ring-shaped clamp having a connecting end around the protector and tightening the connecting end with a bolt or nut;

(b) Method of caulking the protector itself and fixing it to the exhaust pipe.

There is. One thing to be careful of when doing this is (a)
The parts used must have versatility regardless of the size of the exhaust pipe (b) The parts used must be usable even in narrow spaces (c) The parts used must be lightweight and inexpensive, etc. It is.

Regarding (a) above, method (a) requires making individual clamps depending on the size of the exhaust pipe, which increases the number of types of clamps. In other words, the clamp is not versatile. or(
In method b>, the size of the clamp changes depending on the size of the exhaust pipe, and a caulking machine is required for each route of the exhaust pipe, resulting in poor work efficiency.

Regarding (b), method (a) may be difficult to work with due to interference with other parts depending on the tightening area, and it is necessary to take sufficient precautions in advance from the design stage.

Regarding (c), method (a) requires more clamps, bolts, and nuts, resulting in higher costs, and method (b) requires more types of crimping machines, resulting in higher costs.

[Problems to be Solved by the Invention] An object of the present invention is to provide a lightweight and inexpensive method for fixing a protector for an automobile exhaust pipe, which is not affected by the size of the exhaust pipe, has good workability even in a narrow space, and is lightweight and inexpensive. do.

[Technical Means for Solving the Problems] In order to solve the above problems, this invention inserts a cylindrical sealing material having a substantially rectangular cross section into a heat-resistant metal band plate, Wrap it all around the outer circumferential surface of the protector fitted to the outer circumferential surface of an automobile exhaust pipe, pass it through the sealing material inside the band inside the sealing material, and then bend one end to attach one end of the sealing material. the protector is tightened by the band plate by pulling the outer band plate on the other end of the sealing material in the direction that tightens the protector, then caulking the sealing material to fix it to the band plate, and then tightening the sealing material. The method includes a step of cutting the outer strip at the other end.

[Function] Wrap one end of the heat-resistant band plate with the sealing material inserted around the entire outer circumference of the exhaust pipe protector, and when the sealing material is penetrated inside the band plate inside the sealing material, the band creates a loop. is formed. When one end of the bent strip is locked to one end of the sealing material and the other end of the sealing material is pulled in a direction to tighten the protector, the protector is tightened to the exhaust pipe by the strip. After this, the sealing material is fixed to the band plate by caulking, and then the outer band plate is cut at the other end of the sealing material, thereby completing the fixing of the protector to the exhaust pipe.

[Example] The present invention will be described below with reference to FIGS. 1 to 7 showing examples. A cylindrical sealing material 2 having a substantially rectangular cross section is inserted into a rolled band plate 1 made of a heat-resistant metal such as stainless steel or steel. As shown in FIG. 3, one end portion 1a of the strip plate 1 is inserted through a sealing material 2, and then wrapped around the outer circumferential surface of two semicircular protectors 4 fitted to the outer circumferential surface of an exhaust pipe 3 of an automobile. is passed around the protector 4 and passes through the sealing material 2 again along the inner surface 1b side of the strip plate 1 within the sealing material 2,
The locking portion 5 is formed by folding inward approximately 180 degrees. Here, when the outer strip plate of the strip plate 1, which has double inner and outer layers near the sealing material 2, is pulled strongly in the direction of the arrow on the other end 2b side of the sealing material 2, as shown in FIG. 4, it is locked. The portion 5 is locked to the one end 2a side of the sealing material 2, and at the same time, the band plate 1 strongly tightens the protector 4 to the exhaust pipe 3. In this state, when the sealing material 2 is caulked as shown in Fig. 5.6, the band plate 1 will be attached to the sealing material 2.
Fixed. After this, a fifth
Cut the outer strip 1 as shown in the figure. As a result, the seventh
As shown in the figure, the protector 4 is completely tightened to the exhaust pipe 3 by the band plate 1 and the sealing material 2.

[Effects] Since the present invention includes the steps described above, it has the following excellent effects.

(a) Since the protector is directly fastened to the exhaust pipe by the band plate, the thickness of the band plate is thinner than that of the conventional clamp type, resulting in lighter weight and lower costs.

(b) Since bolts and nuts are not used and the sealing material is along the circumferential direction of the protector, the tightening mechanism is compact and can be used even in narrow spaces.

(c) Unlike conventional fixing means, even if the size of the exhaust pipe changes, only the length (amount used) of the strip changes, so the strip is highly versatile without being affected by the size of the exhaust pipe. There is.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of the sealing material, and FIG. 2 shows a sectional view of the sealing material. Figures 3.4.5 respectively show the initial, middle and final stages of the assembly process. FIG. 6 shows a perspective view of a state in which the sealing material is caulked. FIG. 7 shows the completed tightened protector. 1... Band plate 2... Seal material 3... Exhaust pipe 4... Protector 5... Locking part

Claims (1)

[Claims] A cylindrical sealing material with a substantially rectangular cross section is inserted into a heat-resistant metal band plate, and one end of the band plate is wrapped around the entire outer circumference of a protector fitted to the outer circumference of an automobile exhaust pipe. Penetrate the inside of the sealing material inside the band plate inside the sealing material, then bend one end and lock it on one end side of the sealing material, then attach the outer band plate to the protector with the other end of the sealing material. An automobile exhaust pipe characterized in that the protector is tightened by the band plate by pulling it in the tightening direction, the sealing material is caulked and fixed to the band plate, and then the outer band plate is cut at the other end of the sealing material. How to fix the protector.