JP2552972B2 - Assembling method and assembling jig for internal structure of silencer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling method and an assembling jig for an internal structure of a muffler for an automobile engine, which is composed of a partition plate and a communicating pipe.

[0002]

2. Description of the Related Art In the conventional assembly of an internal structure, the contours of a plurality of partition plates are held at a localized value by a jig, and the communicating pipes are inserted into the burring holes for inserting the communicating pipes provided in each partition plate. It is done by welding. Since the outer shell of this conventional silencer is generally circular or elliptical, it is relatively easy to manufacture a jig that matches the contour of the partition plate.

In recent years, however, the size and shape of the underfloor space of the vehicle body are often restricted, and the outer shape of the muffler often has to be irregular. In addition, the shape of the silencer depends on the vehicle type. Are also diverse.

For example, the internal structure a shown in FIG. 1 comprises three partition plates b and several communicating pipes c, and the internal structure a is housed in an outer cylinder d to form a silencer. But the partition plate b
The outer shape of Fig. 2 (a) (b) (c) differs depending on the vehicle type.
Various shapes as shown as b ₁ , b ₂ or b ₃ . Several circles indicated by reference numeral h in the drawing are communication pipe insertion holes, and a double circle P indicates a short communication pipe that has been assembled in advance.

Then, such a partition plate b ₁ , b ₂ or b
_If a jig corresponding to the contour of the partition plate is individually prepared for each muffler that uses ₃ , not only will the cost increase, but positioning will be inaccurate if the holding position is inappropriate.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to an internal structure assembling method and an assembling jig capable of holding a partition plate regardless of the contour of the partition plate and adapting to changes in the distance between the partition plates. The challenge is to obtain.

[0007]

A method for assembling an internal structure according to the present invention is a method for assembling an internal structure of a silencer, in which a plurality of communicating pipes are integrally assembled to a plurality of partition plates. A plurality of recesses in the plate thickness direction are formed at the localization value inside the contour of the contour, and each partition plate is positioned according to the positioning projections of the jig that has the localization value and communicates with each partition plate. The tube is inserted and welded to form the internal component.

The jig used for assembling this is
A plurality of bay-shaped portions that open toward one side, positioning protrusions that are provided on the plate surface along the bay-shaped portions, and partition plate clampers that are disposed near the positioning protrusions It is characterized in that the jig plate is attached to a plurality of columns provided upright on the substrate via spacers.

[0009]

According to the assembling method of the present invention, since the partition plate is positioned by the recess provided in the plate surface, the partition plate is positioned without holding the contour.

Further, according to the assembly jig of the present invention, the partition plate can be held irrespective of the contour thereof, and the number of the jig plates and the spacers provided between the plates can be changed so that the silencer of different standards can be obtained. Can be used.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The partition plate for carrying out the present invention is shown in FIG.
_{Although the} outer shape and the arrangement position of the communication pipe are different as exemplified by ₁ , b ₂ or b ₃ , in each case, the three concave portions f are formed in a constant position in the part without holes in each partition plate in the plate thickness direction. Has been formed. Further, as shown in FIG. 3, if the jig is provided with a projection that engages with each recess f, each partition plate can be positioned.

4 to 6, reference numeral 1 denotes a jig of the present invention for positioning the partition plate. The jig 1 has two columns 3 standing on a substrate 2 and three jigs of the same shape. Ingredient plates 4a, 4b,
4c is held at predetermined intervals via spacers 5, 6, 7 (FIG. 6) having a U-shaped cross section, and is fixed by a washer 8 and a nut 9 fitted to the screw 3a at the upper end of the column 3. .

Each jig plate 4a-4c is provided with a bay-shaped portion 10 notched from one side so as to surround the location of the hole for the communicating pipe shown in FIG. 2 (FIGS. 4 and 6). Three positioning protrusions 11 are planted at positions along the shaped portion 10.

A clamper 12 is provided near each positioning protrusion 11, and the clamper 12 is shown in FIG.
As shown in FIG. 5, the intermediate portion of the clamp arm 12c is connected to the fulcrum 12a by the link 12b, and the rod 12e of the hydraulic or pneumatic cylinder 12d attached to the lower surface of the jig plate 4a is connected to the outer end of the clamp arm 12c. With a structure in which the inner end of the clamp arm 12c is a two-forked 12f (FIG. 6),
It is common to each jig plate, and is pressed from the outside of the recess f by the forked portion 12f.

For example, a case of setting three partition plates having the same shape as the partition plate b ₁ shown in FIG. 2A will be described. As shown in FIG. 5, each of the jig plates 4a, 4b and 4c is set. If the partition plates b ₁₁ , b ₁₂ , and b ₁₃ are placed on the positioning protrusions 11 and the recesses f are engaged with the positioning protrusions 11 and the cylinders 12d are actuated simultaneously, the clamp arms 12c are divided into two forks 12.
The partition plate is pushed by f, and each concave portion f is pressed against the positioning projection 11 to maintain the localization value.

In this case, the short communicating pipes P ₁ , P ₂ , P ₃ provided on the partition plates b ₁₁ , b ₁₂ of FIG. 5 are attached in advance. Then, an internal structure can be obtained by inserting a communication pipe passing through each of the partition plates b ₁₁ , b ₁₂ , and b ₁₃ after setting the partition plate and welding the penetrating portion. When the cylinder 12 is deenergized, it can be taken out, and the communication pipe part escapes from the opening of the bay-shaped part 10.

In the above embodiment, three positioning projections 11 are provided, but the number of the projections may be four or more, or two if the means for horizontally holding the partition plate is used. Good.

[0018]

As described above, according to the method of the present invention, the partition plate is positioned by the recess provided on the plate surface of the partition plate in the plate thickness direction. Therefore, the partition plate is placed at an accurate position regardless of the outer shape of the partition plate. It can be held, and by welding the communication pipe to this, an effect of obtaining a highly accurate internal structure is obtained. Therefore, there is an advantage that the silencer can be extremely easily formed by fitting the outer cylinder to the inner structure.

Further, since the jig of the present invention can deal with products having different distances between partition plates only by exchanging spacers between jig plates, so long as the cross-sectional area of the silencer is not so different. Since most models can be processed with the same jig, the jig cost is extremely low.

[Brief description of drawings]

FIG. 1 Schematic diagram of silencer

FIG. 2 Plan views of various partition plates

[Fig. 3] Enlarged view of the positioning unit

FIG. 4 is a perspective view of an embodiment of a jig of the present invention.

[Fig. 5] Front view of the above

FIG. 6 Same as above

FIG. 7: Side view of the clamp

[Explanation of symbols]

1 jig 2 post 4a, 4b, 4c jig plate 5, 6, 7 spacer 11 positioning protrusion 12 clamper b _11, b _12, b ₁₃ partition plate

Claims (2)

(57) [Claims] 1. A method of assembling an internal structure of a silencer, wherein a plurality of connecting pipes are integrally assembled to a plurality of partition plates,
A plurality of recesses in the plate thickness direction are formed at the localization values inside the contour of each partition plate, and each partition plate is positioned according to the positioning projections of the jigs that are provided at the localization values. A method for assembling an internal structure of a muffler, characterized in that a communication pipe is inserted into a plate and welded to form an internal component. 2. A bay-shaped portion opening toward one side, a positioning protrusion provided on the plate surface along the bay-shaped portion, and a partition plate clamper provided in the vicinity of the positioning protrusion. A jig for assembling an internal structure of a silencer, characterized in that a plurality of jig plates each having the above are attached to a plurality of pillars erected on a substrate via a spacer.