JPH0150762B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is for inserting and connecting a double pipe, which is constructed by arranging two round pipes of the same diameter in parallel, into an irregularly shaped pipe having an oval cross section. This connection tool is used, for example, when adjusting and connecting a ski carrier attached to the roof of a car according to various vehicle widths.

[Conventional Examples and Their Disadvantages] This type of double-pipe connection device used in ski carriers uses a tube at the open end of an irregularly shaped pipe with an oval cross section into which two round pipes of the same diameter are inserted in parallel. There is a device in which a shaped cap body is fitted onto the outside, and two round holes are formed in the wall portion of the end of the cap body that covers the open end, through which the round pipes pass through. It is already well known from the official gazette.
According to this, when connecting both pipes, the two round pipes are inserted through the round holes in the wall of the cylindrical cap body fitted over the open end of the irregularly shaped pipe, and the left and right sides of the bottom of the cylindrical cap body are connected. The tips of the screws, which are screwed together at symmetrical positions, pass through the irregularly shaped pipe and are brought into pressure contact with the outer circumferential surface of each of the round pipes. However, in this example, the tips of the screws are brought into direct pressure contact with the outer circumferential surface of each round pipe by screwing the respective screws, so that the outer circumferential surface of the round pipe may be damaged or unevenness may occur on the surface. As a result, not only does the aesthetic appearance on the surface of each round pipe deteriorate, but also the screw tightening of each screw becomes uneven and incomplete due to vibration, etc., and distortion is likely to occur when connecting irregularly shaped pipes to each round pipe. There are drawbacks.

In addition, since each screw is directly pressed against each outer peripheral surface of the round pipe, it is difficult to apply an average tightening amount to each round pipe due to dimensional errors and uneven tightening force of each connecting member. Not only does this increase imperfections in the connection, but it also requires screw holes and screws for each pipe, which leads to complicated work processes and increased costs.

[Object and structure of the present invention] The present invention solves the above-mentioned drawbacks, prevents the occurrence of scratches and unevenness on the outer peripheral surface of each round pipe due to pressure contact of the screw tips when connecting pipes, and also prevents the occurrence of scratches and unevenness on the outer circumferential surface of each round pipe. The object of the present invention is to provide a double pipe connecting tool for a ski carrier that can easily and quickly connect a deformed pipe and two round pipes of the same diameter.

Therefore, in the present invention, a cylindrical cap body made of synthetic resin is fitted onto the open end of an irregularly shaped pipe having an oval cross section into which two round pipes of the same diameter are inserted in a parallel arrangement, and a cap body made of synthetic resin is fitted onto the open end of the pipe to cover the open end. Two round holes are formed in the wall at the end of the cap body, through which the double round pipes pass, and extend from the inner surface of the wall to the internal space of the cap surrounded by the inner surface of the irregularly shaped pipe and the outer surface of the double round pipes. An elastic crimp piece is integrally formed, and a screw is provided at the center of the long side of the body of the cap body on the side where the elastic crimp piece is formed, the tip of which penetrates the irregularly shaped pipe and comes into contact with the outer surface of the elastic crimp piece. Constructed by screwing together.

[Operation of the present invention] Two round pipes of the same diameter inserted in parallel in a cylindrical cap body have an average pressure between the elastic crimp piece pushed up by screw tightening and the inner wall of the irregularly shaped pipe. A clamping force is applied and the screw is fixed at the same time by one crimp piece, and the tip of the screw penetrates through the cylindrical cap body body and the irregularly shaped pipe and comes into direct contact with the outer surface of the elastic crimp piece. Therefore, it does not come into direct contact with the outer peripheral surface of the round pipe.

[Example] An example in which the present invention is applied to a ski carrier will be described below with reference to FIGS. 1 to 4. In the figure, reference numeral 1 denotes a cylindrical cap body made of synthetic resin that forms the main body of the dual pipe connecting tool A, and is fitted onto the open end 2a of a deformed pipe 2 having an oval cross section. Also 3a, 3
b are two round pipes having the same diameter, forming a double pipe, and inserted into the irregularly shaped pipe 2 in a parallel arrangement. The wall 4 at the end of the cylindrical cap body 1 has two round holes 4 through which the round pipes 3a and 3b pass.
A and 4b have been established. Then, from the inner surface of the wall portion 4 to the inner surface of the irregularly shaped pipe 2 and the both round pipes 3
As clearly shown in FIG. 3, an elastic crimp piece 5 having a substantially trapezoidal cross section and a curved inclined surface is integrally formed in the interior space of the cap body 1 surrounded by the outer surfaces of the caps a and 3b. In this embodiment, the elastic crimp piece 5 extends from the central lower end of both round holes 4a, 4b.

Reference numeral 6 designates a notch with a rectangular cross section formed at the lower part of the elastic crimp piece 5 at the center of the inner bottom 1b of the cylindrical cap body 1, and a nut 7 with a square plan shape and a female thread 7a carved therein. has been inserted.

Reference numeral 8 denotes a screw screwed into the center of the long side of the body 1a of the cylindrical cap body 1, and its tip 8a is connected to the bottom 2 of the irregularly shaped pipe 2, as shown in FIGS. 2 and 3.
The elastic crimp piece 5 passes through the insertion hole 2c opened in b.
It is in contact with the outer surface of. The screw 8 passes through the body 1a of the cap body 1 and the bottom 2b of the irregularly shaped pipe, and the male thread 8a of the screw is finally screwed into the female thread 7a of the nut 7 inserted into the notch 6. be. Furthermore, 9a, 9b, and 10
Numerals a and 10b are hooks that are integrally formed on the outer periphery of the cylindrical cap body 1 in order to lock the rubber bands that tie the skis together, and hooks 11a and 11b are provided at the tips of both round pipes 3a and 3b, and are attached to the ends of the round pipes 3a and 3b. This is a mounting bracket for fixing to both sides of the roof.

In the dual pipe connecting tool A constructed in this way, as shown in FIG.
The bottom part 2 of the irregularly shaped pipe 2 is located between the elastic crimp piece 5 integrally extended on the inner surface of the cap body 1 and the inner bottom 1b of the cap body 1.
A through hole 1 into which the distal end b is inserted, and an insertion hole 2c formed in the bottom 2b of the irregularly shaped pipe 2 is formed in the bottom 1c at the center of the long side of the cap body body 1a.
Stop at a position exactly above point d. Then, insert the screw 8 through the through hole 1d of the cap body bottom 1c, screw it into the female thread 7a of the nut 7, which has been placed in advance at a position corresponding to the through hole 1d inside the notch 6, and screw it into the tip 8a of the screw 8. is brought into contact with the outer surface 5a of the elastic crimp piece 5 located above it.

Next, two round pipes 3a and 3b of the same diameter to be connected to the irregularly shaped pipe 2 are inserted into the two round holes 4a and 4b opened in the wall 4 at the end of the cylindrical cap body 1, respectively.
The deformed pipe 2, which has already been stopped at a predetermined position inside the cap body 1, is stopped at a position where the desired length is obtained. At this time, as shown in FIG. 3, the central lower circumferential surface 3 of each round pipe 3a, 3b arranged in parallel
c, 3d, both left and right inclined curved surfaces 5b, 5b of the elastic crimp piece 5 are sandwiched between them.
confront each other.

Finally, when the screw 8 already screwed onto the bottom 1c of the cap body 1 is further screwed, the tip 8a of the screw 8 comes into pressure contact with the outer surface 5a of the crimp piece.
In order to gradually push it upward, the left and right inclined curved surfaces 5b, 5b of the elastic crimp piece 5 are crimped to the lower circumferential surfaces 3c, d of the opposing round pipes 3a, 3b, respectively, and ultimately each round pipe Outer peripheral surface 3 of 3a, 3b
e is pressed and fixed between the left and right inclined curved surfaces 5b, 5b of the crimp piece 5 and the inner wall 2d of the irregularly shaped pipe 2. For this reason, each round pipe 3a, 3b outer peripheral surface 3e
The tip 8a of the screw 8 will not come into direct pressure contact with the outer circumferential surface 3e and damage it. Also, as a result, each round pipe 3a, 3d is fixed to the inner wall 2d of the irregularly shaped pipe 2 with an average tightening amount by screwing only one screw 8, resulting in a structure of two round pipes arranged in parallel. It does not cause any distortion. Therefore, the inherent strong durability of the double pipe against external pressure can be maintained. In this way, the cylindrical cap body 1
Irregular pipe 2 that has already been fitted inside from the opposite direction
Round pipe 3 inserted through round holes 4a and 4b
a, 3b are pressed and fixed by the elastic crimp piece 5, and are firmly and integrally connected to the irregularly shaped pipe 2.

[Other Embodiments] FIG. 5 shows an embodiment in which the dual pipe connecting tool A according to the present invention is used in a hanger installation base. , two round pipes 3a and 3b of the same diameter
are inserted through round holes 4a and 4b formed in the wall portion 4, and the round pipe 3 is inserted through an elastic crimping piece (not shown) by a screw 8 passing through the irregularly shaped pipe 2.
a and 3b are integrally connected to the irregularly shaped pipe 2 inside the cap body 1.

[Effects of the present invention] As described through the above embodiments, according to the double pipe connecting tool of the present invention, when connecting irregularly shaped pipes, the outer circumferential surfaces of two round pipes of the same diameter are pressed by the tips of the screws. There are no scratches or irregularities, and there are no differences in the tightening amount due to uneven tightening force or dimensional errors between pipes, so the round pipe can be easily tightened inside the irregularly shaped pipe fitted inside the cylindrical pipe. As a result, it is possible to completely connect with irregularly shaped pipes, and it is also possible to simplify manufacturing by reducing the number of through holes and screw holes in each connecting member, and by reducing the number of screws.
It can also be done quickly.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
3 is an enlarged cross-sectional view of the main part, FIG. 4 is an exploded perspective view of the main part, and FIG. 5 is a perspective view showing another embodiment. 1... Cylindrical cap body, 1a... Body part, 1d...
...through hole, 2...unshaped pipe, 2a...open end,
2c...Insertion hole, 3a, 3b...Round pipe, 4...
... Wall portion, 4a, 4b ... Round hole, 5 ... Elastic crimp piece, 6 ... Notch, 7 ... Nut, 8 ... Screw, 8
a...(screw) tip, A...double pipe connection tool.

Claims (1)

[Claims] 1. A synthetic resin cylindrical cap body is externally fitted onto the open end of an abnormal pipe with an oval cross section into which two round pipes of the same diameter are inserted in a parallel arrangement, and the end of the cap body covers the open end. Two round holes are formed in the wall portion through which the double round pipes pass, and an elastic crimp piece is provided extending from the inner surface of the wall portion to the internal space of the cap surrounded by the inner surface of the irregularly shaped pipe and the outer surface of the double round pipes. A screw is screwed into the center of the long side of the body of the cap body on the side where the elastic crimp piece is formed, the tip of which penetrates the irregularly shaped pipe and comes into contact with the outer surface of the elastic crimp piece. A double pipe connecting tool characterized by: