JPH0524464Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flexible tube attachment jig used for attaching a flexible tube provided in a vehicle exhaust system or the like.

[Conventional technology]

In the exhaust system of a vehicle, a flexible tube for absorbing engine vibrations is provided between a front exhaust pipe fixed to the engine and a rear exhaust pipe fixed to the vehicle body. (For example, in 1987
−54614).

Such flexible tubes are generally installed using a flexible tube installation jig. To attach this flexible tube, positioning claws 19a and 19b are provided at both ends of the flexible tube B as shown in FIG. 6, and a flexible tube mounting jig A as shown in FIG. Horizontally long holes 2 of the engaging parts 15a and 15b protruding from both ends of the
1a and 21b to hold the unstable flexible tube B, and in this state, the flange part of the exhaust pipe and the flange part 18 of the flexible tube B are connected.
a and 18b are attached and fixed with bolts and nuts.

Incidentally, in general, in the flexible tube B, there is no phase difference between the upper and lower flanges 18a and 18b provided at both ends of the tube body 17, but depending on the vehicle model, the upper and lower flanges 18a and 18b, as shown in FIGS. Some flanges 18a and 18b have a phase difference of about 30°.

[The problem that the idea aims to solve]

However, when using the flexible tube mounting jig A described above, the engaging portions 15a at both ends,
In order to ensure a certain degree of strength of the engaging part 15b, a reinforcing member ₂₂ is provided on the inside as shown in FIG. , 15b has a relatively long width _L2 .

Therefore, when attaching the flexible tube B, there is a possibility that the bolt/nut 20 may interfere with the engaging portions 15a, 15b as shown in FIG. In order to avoid this interference, the engaging portions 15a and 15b may be positioned between both bolts and nuts 20, but as described above, in order to reinforce the elongated holes 21a and 21b, the engaging portions 15a and 15b Since the width l ₂ of 15b is increased, there is a possibility that the engaging portions 15a and 15b may interfere with the bolt nut 20.

Therefore, using another dedicated jig, the engaging portion 15 due to the phase difference between the upper and lower flange portions 18a and 18b is
A separate jig is required to forcibly correct the interference between a, 15b and the bolt/nut 20.

This invention was made to solve the above-mentioned drawbacks, and its purpose is to prevent the bolts and nuts from interfering with the jig when installing the flexible tube even if there is a phase difference between the upper and lower flanges of the flexible tube. An object of the present invention is to provide a flexible tube mounting jig.

[Means to solve the problem]

In order to achieve the above object, the present invention has a cylindrical jig body in which left and right opening/closing plates are provided via a hinge, and engaging parts protruding from both ends of the jig to engage with positioning claws provided on a flexible tube. In this flexible tube mounting jig, bag-shaped recesses are provided in the engaging portions protruding from both ends of the jig body.

[Effect]

Providing a bag-like recess in the engaging part increases the strength of the engaging part, and narrows the width between the bag-like recess and the edge of the engaging part to ensure strength, thereby reducing the overall strength of the engaging part. width becomes narrower. Therefore, the gap between the mounting position of the bolt nut and the engaging part is widened, and even if there is a phase difference between the upper and lower flange parts, interference between the bolt nut and the engaging part can be avoided.

〔Example〕

Hereinafter, one embodiment of the flexible tube mounting jig according to the present invention will be described with reference to FIGS. 1 to 5.

Reference numeral 10 denotes a cylindrical jig main body, which is composed of a hinge 11 and left and right opening/closing plates 12a and 12b rotatably provided via the hinge 11. Left and right opening/closing plates 1
A buckle 13 as shown in FIG. 2 is provided on the opposing edges of the opening/closing plates 12a, 12b, as shown in FIG. 3, which flaps when the opening and closing plates 12a, 12b are closed. The buckle 13 is the opening/closing plate 12 on one side.
The buckle receiver 13a is fixed to a or 12b, and the buckle hook part 1 is fixed to the opening/closing plate 12b or 12a on the other side.
3b is fixed, the buckle hook 13b is hooked onto the buckle receiver 13a, and the handle 14 of the buckle hook 13b is held horizontally so that both opening/closing plates 12a and 12b can be clamped. . At both ends of the jig main body 10, in this example, at both the upper and lower ends of the opening/closing plate 12b, engaging portions 15a and 15b that engage with positioning claws 19a and 19b of a flexible tube B, which will be described later, are provided protrudingly. As shown in FIGS. 4a and 4b, the engaging portions 15a and 15b are integrally provided with horizontally long bag-shaped recesses 16a and 16b at the center thereof, which directly engage with the positioning claws 19a and 19b. By providing the bag-like recesses 16a, 16b, the engaging portions 15a, 15b narrow the width _l1 between the bag-like recesses 16a, 16b and the edge of the engaging portion, thereby reducing the overall width of the engaging portions 16a, 16b. A given strength can be obtained even if L ₁ is sufficiently short.

As shown in FIG. 6, B is a flexible tube that is installed, for example, in the middle of the exhaust system of a vehicle, and the bellows-shaped tube body 17 has flanges 18a and 18b provided at both ends to be attached to the upper and lower exhaust pipes. There is. These flange parts 18a, 18b
Due to the type of vehicle or engine, there is a phase difference of, for example, θ=30° between the upper and lower flange portions 18a and 18b, as shown in FIG. Furthermore, positioning claws 19a and 19b are provided at both ends of the tube body 17 for positioning during attachment.

Next, a procedure for attaching the flexible tube B to the exhaust pipe using the flexible tube attachment jig A will be described.

The flexible tube B shown in FIG. 6 is covered with the cylindrical jig body 10 of the flexible tube A, and the upper and lower positioning claws 19 of the tube body 17 are
a, 19b, the upper and lower engaging parts 15a of the jig main body 10,
The bag-shaped recesses 16a and 16b of the buckle 15b are engaged to clamp both the opening and closing plates 12a and 12b with the buckle 13. The unstable and wobbling flexible tube B is stably fixed to a predetermined length by this clamp. In this state, the flexible tube B and the upper and lower exhaust pipes are attached and fixed with bolts and nuts 20 as shown in FIG.

According to the flexible tube mounting jig A, the overall width _L1 of the engaging portions 15a and 15b is short;
As shown in the figure, the bolt nuts 20 are installed approximately in the center between adjacent bolt nuts 20 and the engaging portions 15a, 15b of the flexible tube attachment jig A are installed without interference. Therefore, reliable installation is expected. In addition, since the engaging portions 15a and 15b have the bag-like recesses 16a and 16b and are strong, there is no need for a separate reinforcing member to increase the strength.

In the above embodiment, the flexible tube B is provided with horizontally long positioning claws 19a, 19b, and the engaging portions 15a, 15b of the flexible tube mounting jig A are provided with horizontally long bag-shaped recesses 16a, 16b. , 19b and the bag-shaped recess 16
It goes without saying that a and 16b may have other shapes and arrangements compatible with each other.

Further, although the exhaust system of a vehicle is shown, the present invention is not limited to this, and can be applied to the case where the flexible tube is attached to other piping.

[Effect of idea]

As described above, according to the present invention, by providing the bag-shaped recesses in the engaging parts protruding from both ends of the jig main body,
Even if there is a phase difference between the upper and lower flange parts, interference between the bolt nut and the engaging part can be avoided, and good installation is expected.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of the flexible tube attachment jig according to the present invention, Figure 2 is a perspective view of the buckle in Figure 1, Figure 3 is a top view of the main parts of Figure 1, and Figure 4. 1 shows the engaging part of FIG. 1, a is a front view thereof, b is a sectional view of a, FIG. 5 is a front view showing a state in which the flexible tube is attached, and FIG. 6 is a perspective view of the flexible tube. Fig. 7 is a top view of Fig. 6, Fig. 8 is a perspective view of a conventional flexible tube mounting jig, and Fig. 9 shows the engaging part of Fig. 8, a is a front view thereof, and b is a FIG. 10 is a front view showing a state in which the tube is attached using a conventional flexible tube attachment jig. 10... Jig main body, 15a, 15b... Engaging portion, 16a, 16b... Bag-shaped recess, B... Flexible tube.

Claims (1)

[Scope of utility model registration request] In the flexible tube mounting jig, the jig has a cylindrical jig main body in which left and right opening/closing plates are provided via a hinge, and engagement parts protruding from both ends of the jig body to engage with positioning claws provided on the flexible tube. A flexible tube mounting jig characterized in that a bag-shaped recess is provided in the engaging portions protruding from both ends of the tool body.