JPH1047543A - Columnar body fixing band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a assembly workability, reduce production men-hours and improve a beautiful sight and a strength by forming an engagingly bent part which can engage the inside of the periphery edge of other connection piece on the one side periphery edge of the connection piece formed on both ends of a cylindrical band main body. SOLUTION: When a fixing band is tightened to a muffler 53, a bush 58 is fitted externally to a bolt 56 and the screw part of the bolt 56 is tightened with a cap nut 57 by inserting to the bolt hole 6 of a connection piece 3 formed a reinforcement rib 4 on a base part and the hole 10 for bolt of a washer 9. When the connection piece 3 is approached mutually in a process in which this cap nut 57 is screwed to the bolt 56, one side connection piece 3b is entered inside the bent part 5 of the other side connection piece 3a and engaged and the shift is not occured by sliding the connection pieces 3 mutually. As the bent part 5 is formed along the entire periphery edge of the one side connection piece 3a, it acts as the reinforcement rib of the connection piece 3a and a deformation is prevented, even if the fixing band is composed of the low strength metal like aluminum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column fixing band (hereinafter simply referred to as a fixing band). More specifically, it is a band for fixing a cylindrical body (including a cylindrical body) whose appearance design affects the commercial value to another device such as a body frame, such as a muffler of a motorcycle. Further, the present invention relates to a fixing band that can be easily positioned at the time of mounting and that can prevent the appearance from being deteriorated due to a displacement caused by bolting.

[0002]

2. Description of the Related Art As shown in FIG. 7, an exhaust pipe 52 of an engine such as a motorcycle 51 or an automobile (not shown) is provided.
A silencer muffler 53 is attached to the tip of
Since this muffler 53 is generally larger in volume and heavier than the exhaust pipe 52, it is usually fixed by bolts 56 using a fixing band 55 or the like to another device such as the body frame 54 adjacent thereto. ing.

[0003] In the case of a motorcycle, since the muffler is exposed to the outside and a part of the external design is closed, the aesthetic appearance greatly affects the commercial value. Therefore, each motorcycle maker has an aesthetic design for the muffler fixing band. Such a muffler fixing band is also disclosed in Japanese Utility Model Publication No. 5-45768.

As shown in FIG. 7, the fixed band 55 is composed of a band main body 55a curved in a cylindrical shape and a band main body 5a.
5a and a connecting piece 55b formed continuously at both ends. A bolt fitting hole is formed in each of the connecting pieces 55b, and the connecting pieces 55b are pressed through the bolts 56 and fixed to the frame 54. Normally, the bottom portion of the band body 55a, that is, the portion opposite to the connecting piece 55b is fixed to the muffler by welding or rivets, but such fixing is not particularly performed when a motorcycle kit is sold.

[0005]

However, it is necessary to assemble and attach two plates, so that the assembling work is troublesome. Further, when the bolt 56 is fastened, the connecting pieces are displaced due to friction between the bolt head and the connecting piece and between the nut and the connecting piece. As a result, no matter how elaborate the fixed band is, the aesthetic appearance of the fixed band is degraded due to the positional deviation.

In order to solve such a problem, the present inventors proposed in Japanese Patent Laid-Open Publication No. Hei 8-109979 a fixing band in which an engaging projection is formed on one of the connecting pieces and an engaging recess is formed on the other. I have. The engagement protrusion and the engagement recess are configured as, for example, a washer having a boss, or as an engagement protrusion formed on one of the connection pieces and an engagement hole formed on the other.

The present invention is a further improvement of the above-mentioned technique proposed by the present inventors, and enables not only an improvement in assembling workability and a reduction in the number of manufacturing steps, but also a further improvement in aesthetics and strength. Things.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided an engagement bend in which one peripheral edge of a connecting piece formed at both ends of a cylindrical band main body can be engaged with the peripheral edge of the other connecting piece. The position of the connecting pieces is prevented by a simple configuration of forming a portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixed band according to the present invention comprises a band main body which is curved in a cylindrical shape, and a connecting piece formed so as to continuously protrude outward at both ends of the band main body. , At least part of the periphery of one connecting piece,
An engagement bent portion bent toward the other connecting piece is formed, and a peripheral edge of the other connecting piece can be engaged with the inside of the engaging bent portion.

Accordingly, when the connecting pieces are sandwiched by bolts, nuts, etc., and the fixing band is attached to the object to be fixed, the connecting pieces are engaged and positioned by merely overlapping the connecting pieces. Assembly becomes extremely easy. In addition, displacement of the connecting pieces (sliding parallel to each other) is also prevented when the bolts or the like are tightened. Therefore, the assembling workability is improved, and the aesthetic appearance of the columnar body, which is the fixed object integrated with the fixing band, is not impaired.

Further, with this configuration, the number of parts can be reduced, and not only the manufacturing cost but also the storage cost can be reduced.

The fixed band of the present invention is not limited to the muffler of a motorcycle or a four-wheeled motor vehicle, but may be a cylindrical body (a cylindrical body having a perfect circular cross section, which is required to maintain other aesthetic appearances. It may be of course also applicable to an elliptical section.

[0013] In the fixing band, when the engaging bent portion is formed along substantially the entire periphery of one of the connecting pieces, not only the above-described action and effect can be obtained, but also Since the side surface of the overlapping portion of the connecting pieces is hidden by the bent portion, the appearance is further improved. That is, for example, in the case of a motorcycle or the like, if the connecting piece having the bent portion is incorporated so as to be on the outside of the vehicle body, the overlapping side surfaces of the connecting pieces are beautiful without being exposed. As described above, in order to hide the overlapping side surface, the width of the bent portion may be set to be equal to or greater than the thickness of the connecting piece. Further, since the bent portion of the entire periphery serves as a reinforcing rib of the connecting piece, even when the fixing band is formed from a low-strength metal such as aluminum, it is possible to effectively prevent the deformation of the connecting piece. Can be.

Further, in the case where the band body is provided with a lining made of an elastic body, when the fixed band is wound around the cylindrical body and bolted, the cylindrical body and the band main body are connected to each other. By increasing the frictional resistance during the period, the displacement of the band body with respect to the cylindrical body is prevented. Therefore, the aesthetic appearance of the cylinder as the fixed object is not impaired. Furthermore, while absorbing the vibration sound of the cylindrical body, it absorbs, for example, the so-called repelling sound of the heated gas passing through the inside of the exhaust pipe muffler and the like, and further, the generation of the vibration sound between the cylindrical body and the fixed band.

Further, a convex portion is formed on a surface of the lining facing the back surface of the band main body, and a window portion is formed in the band main body so that the convex portion is fitted to prevent sliding between the band main body and the lining. This is preferable in that the displacement between the lining and the band body is prevented. It should be noted that the phrase “curved into a cylindrical shape” in the claims does not particularly mean that one material is made into a cylindrical shape, but, for example, a combination of two semi-cylindrical members to form a “cylindrical shape”. "Also includes the band itself.

[0016]

Next, an embodiment of the fixing band of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing an embodiment of the fixing band of the present invention, FIG. 2 (a) is a front view of the fixing band of FIG. 1, and FIG. 2 (b) is II of FIG. 2 (a). FIG. 3 is a perspective view showing a use state of the fixing band of FIG. 1; FIG. 4 is a cutaway plan view of a main part showing a use state of the fixing band of FIG. 1;
FIGS. 5 (a) and 5 (b) are front views of main parts showing another embodiment of the fixing band of the present invention, and FIG. 6 is a cross-sectional view showing another embodiment of the fixing band of the present invention.

In FIG. 1, reference numeral 1 denotes a fixed band, which is a metal band (in this embodiment, an aluminum alloy plate is used).
2 shows a state in which a band main body 2 formed by bending a cylindrical shape is wound around the outer periphery of a muffler 53 of a motorcycle. Reference numeral 3 denotes a pair of connecting pieces formed at both ends of the band body 2 so as to be bent substantially radially outward. Connecting piece 3
Reinforcing ribs 4 are formed on each of the base portions (continuous portions with the band main body 2) so as to be bent outwardly in a convex shape. 2 and FIG. 3, it is clearer, but along the periphery of one connecting piece 3a, a bent portion 5 bent in the direction of the other connecting piece 3b is formed. . Both connecting pieces 3
Are formed so that the other connecting piece 3b is engaged with the inside of the bent portion 5 when they are overlapped. Further, both connecting pieces 3 are provided with corresponding bolt insertion holes (hereinafter referred to as bolt holes) 6. Reference numerals 7 and 8 denote windows formed to reduce the weight of the fixing band and to provide a design effect. Reference numeral 22 denotes a rubber lining described later. The bolt hole 6 of the connecting piece 3 is formed as an elongated hole in order to absorb an assembly dimensional error with the vehicle body frame. Note that FIG.
In (b), what is indicated by a two-dot chain line is a shape in a free state where no fastening force is applied.

Reference numeral 9 in FIG. 1 is a well-known washer.

Reference numeral 56 denotes a fixing bolt, and reference numeral 57 denotes a cap nut. 58 is a bush having a damper function to be fitted to the vehicle body frame.

When the fixing band 1 is fastened to the muffler 53, the bush 58 is externally inserted into the bolt 56, and the screw portion of the bolt 56 is connected to the bolt hole 6 of each of the connecting pieces 3 and the bolt of the washer 9. It fits into the hole 10 and is fastened with the cap nut 57. In the process of screwing the cap nut 57 onto the bolt 56, when the two connecting pieces 3 come close to each other, the other connecting piece 3b naturally enters and engages with the inside of the bent portion 5 of one of the connecting pieces 3a. Therefore, even if the cap nut 57 is tightened, the connecting pieces 3 do not slide and shift.

Since the bent portion 5 is formed along the entire periphery of one connecting piece 3a, it also functions as a reinforcing rib for the connecting piece 3a. Therefore, even a fixed band made of a low-strength metal such as aluminum is hardly deformed. Further, it can be understood that after the fastening, the other connecting piece 3b also functions as a reinforcing rib.

FIG. 3 and FIG. 4 show the state of the fastening. As shown, the other connecting piece 3b is fitted inside the bent portion 5 of one connecting piece 3a.
The width W of the bent portion 5 is larger than the thickness of the connecting piece 3. Therefore, when the two connecting pieces 3 are engaged, the overlapping interface and the side surface of the other connecting piece 3b are bent.
The inside is hidden and the appearance becomes beautiful. In the figure, reference numeral 11 denotes a joining portion provided with a rivet hole 11a for rivet joining with a muffler.

Note that instead of the washer 9 in this embodiment,
It is possible to use a washer with a long hole and a boss portion described in the above-mentioned Japanese Patent Application Laid-Open No. H8-109979.

Although the illustrated bent portion 5 is formed along the entire peripheral edge of the connecting piece 3a, the present invention is not limited to this, and the bent portion 5 is formed on the peripheral edge as shown in FIG. A bent portion with which the other connecting piece 3b can be engaged may be provided at a plurality of places or as shown in FIG. 5B.

The bent portion 5 is formed by press working or the like.

The fixed band 21 shown in FIG. 6 is provided with a rubber lining 22 on the back surface of the metal band main body 2.

The rubber lining 22 is fixed to the fixed band 2
When the bolt 1 is wound around the muffler 53 (FIG. 6) and tightened with bolts, the frictional resistance between the muffler and the band body 2 is increased, thereby displacing the band body 2 in position.
Consequently, displacement of the connecting pieces 3 is prevented. further,
This has the effect of absorbing so-called repelling noise due to rapid expansion of exhaust gas in the muffler during operation of the motorcycle, and absorbing resonance noise due to vibration of the muffler. Further, in the case of a muffler using an aluminum alloy for improving the commercial value by appearance, it is possible to prevent the outer surface of the muffler from being scratched when the fixing band is inserted. In this respect, workability is also improved. In addition, for a fixed band in which the band main body is not fixed to the muffler by rivets or welding, an effect of preventing a scratch on the outer surface of the muffler due to vibration between the muffler and the fixed band is also exerted.

As the rubber lining 22, a fluorine resin or the like having a thickness of about 2 mm is used in this embodiment. A plurality of projections 23 are formed on a surface of the rubber lining 22 that is opposed to the band body 2. This convex part 23
Has a shape that matches the circular window 7 of the band body 2 and a height slightly smaller than the thickness of the band body 2. When the rubber lining 22 is attached to the band main body 2 so that the projection 23 fits into the window 7 of the band main body 2, the fixed band 20 is attached to the muffler 53.
The rubber lining 22 is not greatly deformed and wrinkled when wound around, and does not protrude from the band body 2.

[0030]

According to the present invention, the positioning can be easily performed before the bolt is fastened, and the displacement of the connecting pieces due to the subsequent bolt tightening is prevented. Therefore,
Assembly workability is improved. Also, the number of parts can be reduced, and not only the manufacturing cost but also the storage cost can be reduced.

Further, in the case where the bent portion is formed along the entire peripheral edge of the connecting piece, not only the above-described effects can be obtained, but also the side surface of the overlapping portion of the connecting pieces is formed by the bent portion. Because it is concealed, the appearance is further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an essential part showing one embodiment of a fixing band of the present invention.

2 (a) is a front view of the fixing band of FIG. 1, FIG.
FIG. 2B is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a use state of the fixing band of FIG. 1;

4 is a cutaway plan view of a main part showing a use state of the fixing band of FIG. 1;

FIGS. 5 (a) and 5 (b) are front views of main parts showing another embodiment of the fixing band of the present invention.

FIG. 6 is a sectional view showing another embodiment of the fixing band of the present invention.

FIG. 7 is a perspective view showing a fixed band applied to a muffler of a motorcycle.

[Explanation of symbols]

 1, 21 ... fixed band 2 ... band body 3, 3a, 3b ... connecting piece 5 ... bent portion 6 ... bolt hole 7, 8 ... window 22 ... rubber Lining 53 ・ ・ ・ Muffler

Claims (3)

[Claims] 1. A band body which is curved in a cylindrical shape, and a connecting piece formed so as to continuously protrude outward from both ends of the band body, at least one of the peripheral edges of one of the connecting pieces. A column formed with an engaging bent portion bent toward the other connecting piece side, and configured so that a peripheral edge of the other connecting piece can be engaged with the inside of the engaging bent portion. Body fixing band. 2. The column fixing band according to claim 1, wherein the engaging bent portion is formed along substantially the entire periphery of one of the connecting pieces. 3. The column-body fixing band according to claim 1, wherein a lining made of an elastic body is applied to the inside of the band body.