JP2022142067A - Tubular body connector - Google Patents

Abstract

To provide a tubular body connector capable of easily connecting a corrugated tube with another tubular body with a simple structure.SOLUTION: A tubular body connector 10 connects: a corrugated tube 2, into which an electric wire is inserted; and a hard tube 3. The tubular body connector comprises: a corrugated attachment part 20 attached to an end of the corrugated tube 2; and a tube external attachment part 30 attached either internally fitted into an end of the hard tube 3, or externally fitted onto outside the end of the hard tube 3. The corrugated tube 2 comprises protrusions 2a and recesses 2b alternately arranged. The corrugated attachment part 20 attached to the corrugated tube 2, comprises: a cylindrical attachment part body 21; and fit-in parts 22 that protrude in a radial direction from the attachment part body 21 so as to fit respectively into the recesses 2b or inner face sides of the protrusions 2a of the corrugated tube 2.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular body connector for connecting a corrugated tube through which electric wires such as a wire harness are inserted and another tubular body.

2. Description of the Related Art In general, corrugated tubes through which electric wires can be inserted are often used as exterior products for protecting electric wires such as wire harnesses.
Then, for example, the corrugated pipes are sometimes connected to each other by a connection structure disclosed in Patent Document 1 or the like.

Specifically, in the connection structure disclosed in Patent Document 1, two corrugated pipes are butted with packings attached, the outer peripheral surfaces of the packings are brought into contact with each other and pressed against each other, and a fixing member is attached to the outside of the connection portion. By tightening, a part of the packing is press-contacted to the ridges of the corrugated pipe and connected.
However, the connection structure described above is complicated in structure and requires time and effort for connection.

Further, a smooth tube called a hard tube is sometimes used as a tubular body different in kind from the corrugated tube as an exterior product for protecting electric wires.
For example, when wiring an electric wire on a substantially straight line, the electric wire is inserted through a smooth tube that is difficult to bend, and when wiring is bent, the electric wire is inserted through a flexible corrugated tube. Although there is a desire to connect these exterior products, the connection structure described above cannot connect exterior bodies of different types.

JP 2005-351456 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a tubular body connector that can easily connect a corrugated tube and another tubular body with a simple structure.

The present invention is a tubular body connecting tool for connecting a first tubular body through which an electric wire is inserted and a second tubular body, and is inserted by inserting it into the inside of an end portion of the first tubular body, or A first insertion portion that is inserted and attached to the outside of the end portion of the first tubular body, and an insertion portion that is inserted and attached to the inside of the end portion of the second tubular body or is attached to the outside of the end portion of the second tubular body. at least one of the first tubular body and the second tubular body is a corrugated tube in which unevenness is alternately arranged in the longitudinal direction; Among the first insertion portion and the second insertion portion, the corrugated pipe insertion portion that is inserted into the tubular body made of the corrugated pipe includes a tubular insertion portion main body and a diameter from the insertion portion main body. and a fitting part that protrudes in a direction and enters into the concave part of the corrugated tube.

The fitting portion may protrude radially inward from the insertion portion main body, or may protrude radially outward. The fitting portion protruding radially inward from the insertion portion main body enters the recess on the outer surface side of the corrugated tube, and the fitting portion protruding radially outward from the insertion portion main body is located on the inner surface side of the corrugated pipe. It will get into the recess.

At least one of the first tubular body and the second tubular body may be a corrugated tube in which irregularities are alternately arranged in the longitudinal direction, and the other may be a corrugated tube of the same type, a smooth tube, or the like. It may be a tubular body different in type from the corrugated tube of.
The electric wire may be, for example, a single electric wire such as a coated electric wire or a plurality of electric wires, or may be an integrated electric wire such as a pair of electric wires. Furthermore, a wire harness in which a plurality of electric wires are bundled may be used.

The insertion portion main body and the insertion portion that constitute the corrugated tube insertion portion described above may be integrated, or may be configured by assembling the insertion portion main body and the insertion portion that are separately configured.
The fitting portion may be continuous over the entire circumference, or may be arranged in plurality at predetermined intervals in the circumferential direction.

According to the present invention, it is possible to easily connect a corrugated pipe and another tubular body with a tubular body connector having a simple structure.
More specifically, the corrugated tube to be inserted into the tubular body composed of the corrugated tube, out of the first insertion portion and the second insertion portion of the tubular body connector for connecting the first tubular body and the second tubular body. Since the insertion part is provided with a tubular insertion part main body and a fitting part that protrudes radially from the insertion part main body and enters the recess of the corrugated tube, the tubular shape formed of the corrugated tube is provided. When the corrugated tube inserting part is inserted into the end of the body, the fitting part enters the recess of the corrugated tube, so that the tubular body connector can be firmly connected to the corrugated tube. By inserting the other insertion portion into the end portion of the other tubular body, the corrugated tube and the other tubular body can be connected via the tubular body connector.

As an aspect of the present invention, the insertion portion may be formed continuously in the circumferential direction of the insertion portion main body, and may be formed with a tapered cross-sectional shape that tapers from the insertion portion main body side toward the tip in the projecting direction. good.
According to this invention, it is possible to easily insert the corrugated pipe inserting portion into the end portion of the corrugated pipe by fitting the fitting portion into the concave portion of the corrugated pipe.

More specifically, since the fitting portion is formed continuously in the circumferential direction in the insertion portion main body, it is possible to insert the fitting portion into the concave portion to insert the corrugated tube fitting portion into the end portion of the corrugated pipe. There is a possibility that it may become difficult to insert due to the insertion resistance.

However, since the fitting portion has a tapered cross-sectional shape, the distal end side of the fitting portion is deformed when it is inserted into the end of the corrugated pipe, so that the insertion resistance when it is fitted into the end of the corrugated pipe can be reduced. , the corrugated tube inserting portion can be easily inserted into the end of the corrugated tube.

In addition, since the fitting portion is formed continuously in the circumferential direction in the insertion portion main body, water is stopped between the corrugated pipe and the corrugated pipe insertion portion in the inserted state in which the corrugated pipe is fitted into the concave portion of the corrugated pipe. be able to.

Further, as an aspect of the present invention, the insertion portion formed with a tapered cross-sectional shape has different inclination angles in the insertion direction so that it can be tilted rearward in the insertion direction when the insertion portion and the tubular body are inserted. It may be formed with a tapered cross-sectional shape.
According to the present invention, it becomes easier to insert and less likely to come off, and a stable connection state can be maintained.

More specifically, the insertion portion tilts rearward in the insertion direction during insertion, making it easier to attach. When the fitting portion is fitted into the concave portion of the corrugated tube, the angle of inclination of the tapered cross-sectional shape in the insertion direction is different. Careless extraction from the end of the corrugated pipe can be prevented. Therefore, the connection state can be stably maintained.

Further, as an aspect of the present invention, the first tubular body is composed of the corrugated tube, and the second tubular body is composed of a smooth tube having a smooth surface at least one of an inner surface and an outer surface, and the corrugated tube is the corrugated tube insertion portion, and the second insertion portion is inserted into the second tubular body made of a smooth tube. The fitting portion may be a smooth pipe fitting portion having the tubular fitting portion main body.
According to this invention, the corrugated tube and the smooth tube can be connected via the tubular body connector by inserting the smooth tube insertion portion into a smooth tube different in type from the corrugated tube.

Further, as an aspect of the present invention, a ring-shaped water stop ring is arranged between the insertion portion main body of the smooth tube insertion portion and the smooth surface of the second tubular body, and is in close contact with both to stop water. may be provided.
According to the present invention, a ring-shaped water stop ring is arranged between the insertion portion main body of the smooth tube insertion portion and the smooth surface of the second tubular body so as to be in close contact with both to stop water. Therefore, in the inserted state, water can be stopped between the smooth tube and the smooth tube insertion portion.

In addition, since the water stop ring disposed between the insertion portion main body and the smooth surface is in close contact with both, at least the frictional resistance between the smooth surface and the water stop ring causes the smooth pipe insertion portion to The inserted state with the smooth tube can be stably maintained.

Further, as an aspect of the present invention, the smooth tube insertion portion may be provided with a contact portion that protrudes radially from the insertion portion main body and is in close contact with the smooth surface of the second tubular body.
According to this aspect of the invention, since the contact portion provided on the insertion portion body of the smooth tube insertion portion is in close contact with the smooth surface of the second tubular body, the smooth tube and the smooth tube insertion portion are in contact with each other in the inserted state. It is possible to stop water between

Further, as an aspect of the present invention, both the first tubular body and the second tubular body are made of the corrugated tube, and both the first insertion section and the second insertion section are made of the corrugated tube. It may be the wearing part.
According to this invention, the corrugated pipes can be easily and reliably connected to each other.

Further, as an aspect of the present invention, the corrugated tube insertion portion is configured to be inserted into an end portion of the tubular body, and the insertion portion extends radially outward from the outer peripheral surface of the insertion portion main body. may protrude outward and enter the recess of the inner peripheral surface of the corrugated pipe.

According to this invention, by inserting the corrugated tube inserting portion from the end portion of the corrugated pipe into the interior, the fitting portion protruding radially outward from the outer peripheral surface of the inserting portion main body is formed on the inner peripheral surface of the corrugated pipe. The corrugated tube insertion part can be inserted into the end of the corrugated tube by entering the recess.

In addition, since the corrugated tube insertion portion is inserted inside from the end portion of the corrugated pipe, the corrugated pipe insertion portion can be inserted into the end portion of the corrugated pipe without enlarging the diameter of the corrugated pipe insertion portion. be able to.

Further, as an aspect of the present invention, the corrugated tube insertion portion is configured to be inserted by inserting the end portion of the tubular body thereinto, and the insertion portion extends radially from the inner peripheral surface of the insertion portion main body. It may protrude inward and enter the recess of the outer peripheral surface of the corrugated tube.

According to the present invention, by inserting the end portion of the corrugated tube into the corrugated tube inserting portion, the fitting portion protruding radially inward from the inner peripheral surface of the inserting portion main body extends from the outer peripheral surface of the corrugated tube. The corrugated tube inserting portion and the end portion of the corrugated tube can be inserted by entering the recess.
In addition, since the end of the corrugated tube is inserted into the corrugated tube insertion section, the corrugated tube insertion section and the end of the corrugated tube can be inserted without increasing the diameter of the corrugated tube. can be done.

ADVANTAGE OF THE INVENTION According to this invention, the tubular-body connection tool which can connect a corrugated pipe and another tubular body easily with a simple structure can be provided.

Explanatory drawing of the connection structure which connected the corrugated tube and the hard tube with the tubular-body connection tool. Sectional drawing of the connection structure which connected the corrugated tube and the hard tube with the tubular-body connection tool. Fig. 3 is an exploded perspective view of a connection structure that connects a corrugated tube and a hard tube with a tubular body connector; Explanatory drawing of the connection structure which connected the corrugated tube and the hard tube with another tubular-body connection tool. Sectional drawing of the connection structure which connected the corrugated tube and the hard tube with another tubular-body connection tool. FIG. 4 is an exploded perspective view of a connection structure that connects a corrugated tube and a hard tube with another tubular body connector; Explanatory drawing by sectional drawing of the connection structure which connected the corrugated tube and the hard tube with another tubular-body connection tool. Explanatory drawing by sectional drawing of the connection structure which connected the corrugated tube and the hard tube with another tubular-body connection tool. Explanatory drawing by sectional drawing of the connection structure which connected the corrugated pipe with another tubular body connection tool. Explanatory drawing by the exploded sectional view of a separate tubular body connection tool. Sectional drawing of the connection structure which connected the corrugated tube and the hard tube with the tubular-body connection tool of another aspect.

One embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1 shows an explanatory diagram of a connection structure 1a in which a corrugated tube 2 and a hard tube 3 are connected by a tubular body connector 10a, FIG. 2 shows a cross-sectional view of the connection structure 1a, and FIG. 3 shows the connection structure 1a. 1 shows an exploded perspective view of the.

1(a) is a perspective view of the connection structure 1a, and FIG. 1(b) is a partial cross-sectional perspective view in which a part of the front side of the connection structure 1a is notched.
Also, in FIG. 1, the longitudinal direction of the connection structure 1a is defined as the longitudinal direction L.

The connection structure 1 connects a corrugated tube 2 through which an electric wire 100 (not shown) is inserted and a hard tube 3 via a tubular body connector 10, and the electric wire 100 can be inserted through the whole.
A tubular body connection tool 10 that is inserted into each of the corrugated pipe 2 and the hard tube 3 to connect the corrugated pipe 2 and the hard tube 3 includes a corrugated insertion part 20 that is inserted into the end of the corrugated pipe 2. , and a tube inserting portion 30 that is inserted into the end of the hard tube 3 .

The electric wire 100 to be inserted through the connection structure 1 may be, for example, a single electric wire such as a coated electric wire or a plurality of electric wires, or may be an integrated electric wire such as a pair of electric wires. Furthermore, a wire harness in which a plurality of electric wires are bundled may be used.

The corrugated pipe 2 is a flexible cylindrical body in which convex portions 2a and concave portions 2b are alternately arranged in the longitudinal direction L. As shown in FIG.
The hard tube 3 has a smooth inner and outer peripheral surface, and is a cylindrical body that is less likely to bend than the flexible corrugated tube 2 . Therefore, for example, it is used in a place where the electric wire 100 to be inserted therein is to be routed in a substantially straight line.

The corrugated tube 2 and the hard tube 3 are formed with substantially the same inner diameter and outer diameter. Specifically, the outer peripheral surface of the convex portion 2a in the corrugated tube 2 in which the convex portions 2a and the concave portions 2b are alternately arranged in the longitudinal direction L and the outer peripheral surface of the hard tube 3 are formed with the same diameter, and the inner surface of the concave portion 2b is formed. The peripheral surface and the inner peripheral surface of the hard tube 3 are formed with the same diameter.

1 to 3, the tubular body connector 10a (10) is arranged between the corrugated tube 2 and the hard tube 3 arranged along the longitudinal direction L, and the corrugated tube 2 and the hard tube 3 are arranged. , and connects the corrugated tube 2 and the hard tube 3 .

A tubular body connector 10a that is inserted into each of the corrugated tube 2 and the hard tube 3 to connect the corrugated tube 2 and the hard tube 3 has an inserting part 20a inside the corrugated tube that is inserted into the end of the corrugated tube 2. (20), a tube extra-insertion attachment portion 30a (30) to be attached to the end of the hard tube 3, and the corrugated inner-insertion portion 20a and the tube extra-insertion attachment portion 30a. It has a connection portion 40a that connects the portion 20a and the tube external insertion/attachment portion 30a.

The corrugated inner insertion portion 20a has a structure in which it is inserted into the corrugated pipe 2 from its end and is inserted into the corrugated pipe. 2 recesses, that is, a fitting portion 22a that fits into the inner surface side of the projection 2a is provided.
The fitting portion 22a is formed continuously in the circumferential direction of the insertion portion main body 21a and has a tapered cross-sectional shape that tapers toward the tip in the projecting direction, that is, a triangular cross-sectional shape.

Further, the fitting portion 22a formed with a tapered cross-sectional shape has a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted rearward in the insertion direction when the corrugated inner insertion portion 20a and the corrugated pipe 2 are inserted. is formed by
Specifically, the fitting portion 22a having a triangular cross-section is formed to have a triangular cross-section that slopes from the tip of the insertion portion main body 21a toward the connecting portion 40a.

The tube external insertion attachment portion 30a to be attached to the end portion of the hard tube 3 includes a cylindrical insertion portion main body 31a to be fitted to the end portion of the hard tube 3. , a mounting groove 32 for mounting a water stop ring 33 is formed.

A connecting portion 40a which is arranged between the corrugated inner insertion portion 20a and the outer tube insertion portion 30a and which connects the inner corrugated insertion portion 20a and the outer tube insertion portion 30a has a diameter larger than the inner corrugated insertion portion 20a. In order to connect the large external tube insertion portion 30a and the corrugated internal insertion portion 20a, the diameter is gradually reduced from the external tube insertion portion 30a toward the internal corrugated insertion portion 20a.

In order to connect the corrugated tube 2 and the hard tube 3 using the tubular body connector 10a configured as described above, the tube extra-insertion attaching portion 30a having the waterproof ring 33 attached to the attachment groove 32 is attached to the hard tube 3. Insert so that it fits over the end.
In addition, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from the end portion so that the fitting portion 22a is inserted into the inner surface side of the convex portion 2a which is concave on the inner surface side of the corrugated pipe 2.

As described above, the inner corrugated insertion portion 20a is inserted inside from the end of the corrugated tube 2, and the outer tube insertion portion 30a is inserted so as to fit on the end of the hard tube 3. , the connecting structure 1a can be configured by connecting the corrugated tube 2 and the rigid tube 3 via the tubular body connector 10a.

Next, a connection structure 1b in which the corrugated tube 2 and the hard tube 3 are connected by the tubular body connector 10b will be described with reference to FIGS. 4 to 6. FIG.
FIG. 4 shows an explanatory diagram of a connection structure 1b in which the corrugated tube 2 and the hard tube 3 are connected by a tubular body connector 10b, FIG. 5 shows a cross-sectional view of the connection structure 1b, and FIG. 6 shows the connection structure 1b. 1 shows an exploded perspective view of the.

4(a) is a perspective view of the connection structure 1b, and FIG. 4(b) is a partial cross-sectional perspective view in which a part of the front side of the connection structure 1b is notched.

The tubular body connector 10b (10) is a tubular body in which an inner corrugated insertion portion 20a is inserted inside the corrugated tube 2 and an outer tube insertion portion 30a is inserted so as to fit on the end portion of the hard tube 3. Unlike the body connector 10a, there are a corrugated externally-inserted portion 20b (20) that is externally fitted to the end of the corrugated tube 2, and a tube externally-inserted portion 30a ( 30).

Specifically, the tubular body connector 10b is arranged between the corrugated outer insertion portion 20b, the tube outer insertion portion 30a, and the corrugated outer insertion portion 20b and the tube outer insertion portion 30a. It has a connection portion 40b that connects the attachment portion 20b and the tube extra-insertion attachment portion 30a.

The corrugated extra-insertion attachment portion 20b includes a cylindrical insertion portion main body 21b that is inserted so as to fit over the end portion of the corrugated pipe 2, and a cylindrical insertion portion main body 21b that protrudes radially inward from the insertion portion main body 21b and is formed in a concave portion of the corrugated pipe 2. , that is, a fitting portion 22b that fits into the recess 2b on the outer surface side of the corrugated pipe 2 is provided.
The fitting portion 22b has the same cross-sectional shape as the fitting portion 22a of the corrugated insertion portion 20a of the tubular body connector 10a described above, although the projecting direction in the radial direction is different.

The connecting portion 40b, which is arranged between the corrugated external insertion portion 20b and the tube external insertion portion 30a and connects the corrugated external insertion portion 20b and the tube external insertion portion 30a, is slightly larger than the tube external insertion portion 30a. In order to connect the corrugated outer insertion portion 20b and the tube outer insertion portion 30a, which are large in diameter, the diameter is gradually reduced from the corrugated outer insertion portion 20b toward the tube outer insertion portion 30a. .

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10b configured in this way, the tube extra-insertion attachment portion 30a having the waterproof ring 33 attached to the attachment groove 32 is attached to the hard tube 3. Insert so that it fits over the end.
In addition, the corrugated outer insertion portion 20b is fitted to the end portion of the corrugated pipe 2 so that the fitting portion 22b is fitted into the concave portion 2b formed on the outer surface side of the corrugated pipe 2. As shown in FIG.

As described above, the corrugated externally-inserted portion 20b is inserted so as to fit over the end of the corrugated tube 2, and the tube externally-inserted portion 30a is inserted so as to fit over the end of the hard tube 3. By doing so, the connection structure 1b(1) can be configured by connecting the corrugated tube 2 and the hard tube 3 via the tubular body connector 10b.

Next, connection structures 1c and 1d in which the corrugated tube 2 and the hard tube 3 are connected by tubular body connectors 10c and 10d will be described with reference to FIG.
FIG. 7 shows a cross-sectional explanatory view of connection structures 1c and 1d in which the corrugated tube 2 and the hard tube 3 are further connected by other tubular body connectors 10c and 10d. Specifically, FIG. 7(a) shows a sectional view of a connection structure 1c connected by a tubular body connector 10c, and FIG. 7(b) shows a sectional view of a connection structure 1d connected by a tubular body connector 10d. ing.

A tubular body connector 10c (10) that constitutes the connection structure 1c (1) shown in FIG. It is composed of an in-tube insertion portion 30c (30) and a connecting portion 40c that connects the in-tube insertion portion 20a and the in-tube insertion portion 30c.

The in-tube insertion portion 30c to be inserted into the end portion of the hard tube 3 has a structure in which a cylindrical insertion portion main body 31c is inserted into the hard tube 3 from the end portion thereof. A mounting groove 32 for mounting a water stop ring 33 is formed on the outer surface of the front end side of the mounting portion main body 31c.

Since the insertion portion main body 31c of the intra-tube insertion portion 30c and the insertion portion main body 21a of the intra-corrugated insertion portion 20a configured in this manner have substantially the same diameter, the intra-corrugated insertion portion 20a and the intra-tube insertion portion 20a have substantially the same diameter. A connecting portion 40c connecting with the portion 30c is formed in a substantially cylindrical shape.

In order to connect the corrugated tube 2 and the hard tube 3 using the tubular body connector 10c configured as described above, the tube inner insertion portion 30c having the waterproof ring 33 attached to the attachment groove 32 is inserted into the hard tube 3. It is inserted by inserting it inside from the end.
In addition, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from the end portion so that the fitting portion 22a is inserted into the inner surface side of the convex portion 2a which is concave on the inner surface side of the corrugated pipe 2.

As described above, by inserting the intra-corrugated insertion portion 20a from the end of the corrugated tube 2 into the interior and inserting the intra-tube insertion portion 30c from the end of the hard tube 3 into the interior, the tubular body The connection structure 1c can be configured by connecting the corrugated tube 2 and the rigid tube 3 via the connector 10c.

A tubular body connector 10d (10) constituting a connection structure 1d (1) shown in FIG. ), and a connecting portion 40d that connects the corrugated outer insertion portion 20b and the tube inner insertion portion 30c.

The outer corrugated insertion portion 20b is inserted so as to fit on the end portion of the corrugated pipe 2 from the insertion portion main body 31c of the tube inner insertion portion 30c which is inserted from the end portion of the hard tube 3 and inserted inside. The insertion portion main body 21b has a large diameter, and in the tubular body connector 10d, the connection portion 40d that connects the corrugated external insertion portion 20b and the tube-inside insertion portion 30c extends from the corrugated external insertion portion 20b into the tube. It is formed so that the diameter gradually decreases toward the insertion portion 30c.

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10d configured as described above, the tube inner insertion portion 30c having the waterproof ring 33 attached to the attachment groove 32 is inserted into the hard tube 3. It is inserted by inserting it inside from the end.
In addition, the corrugated outer insertion portion 20b is fitted to the end portion of the corrugated pipe 2 so that the fitting portion 22b is fitted into the concave portion 2b formed on the outer surface side of the corrugated pipe 2. As shown in FIG.

As described above, the corrugated outer insertion portion 20b is inserted so as to fit on the end of the corrugated tube 2, and the tube inner insertion portion 30c is inserted into the rigid tube 3 from the end. By doing so, the connection structure 1d can be configured by connecting the corrugated tube 2 and the hard tube 3 via the tubular body connector 10d.

Next, connection structures 1e to 1h in which the corrugated tube 2 and the hard tube 3 are connected by tubular body connectors 10e to 10h will be described with reference to FIG.
FIG. 8 shows a cross-sectional explanatory view of connection structures 1e to 1h in which the corrugated tube 2 and the hard tube 3 are connected by other tubular body connectors 10e to 10h. Specifically, FIG. 8(a) shows a sectional view of a connection structure 1e connected by a tubular body connector 10e, and FIG. 8(b) shows a sectional view of a connection structure 1f connected by a tubular body connector 10f. 8(c) shows a sectional view of a connection structure 1g connected by a tubular body connector 10g, and FIG. 8(d) shows a sectional view of a connection structure 1h connected by a tubular body connector 10h. .

As shown in FIG. 8(a), the tubular body connector 10e (10) includes the above-described corrugated inserting portion 20a (20) and an external tube inserting portion 30e ( 30) and a connecting portion 40e disposed between the corrugated inner insertion portion 20a and the outer tube insertion portion 30e for connecting the inner corrugated insertion portion 20a and the outer tube insertion portion 30e. .

The tube external insertion attachment portion 30e to be attached to the end portion of the hard tube 3 is provided with an attachment groove 32 on the inner surface on the distal end side, and differs from the tube insertion attachment portions 30a and 30c to which the water stop ring 33 is attached. It has a tubular inserting portion main body 31e that is fitted onto the end portion, and a contact piece 34 that protrudes radially inward from the inner surface of the inserting portion main body 31e.

Similar to the fitting portion 22a of the corrugated inner fitting portion 20a, the fitting piece 34 is continuously formed in the circumferential direction of the fitting portion main body 31e and has a tapered cross-sectional shape that tapers toward the tip in the projecting direction. It is formed in a triangular shape.

Further, the contact piece 34 formed with a tapered cross-sectional shape has a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted rearward in the insertion direction when the tube external insertion attachment portion 30e and the hard tube 3 are inserted. is formed by
Specifically, the contact piece 34 having a triangular cross-section is formed to have a triangular cross-section that slopes from the tip of the insertion portion main body 31e toward the connecting portion 40e. Therefore, the inclination directions of the contact piece 34 and the fitting portion 22a are opposite to each other in the longitudinal direction L. As shown in FIG.

A connecting portion 40e which is arranged between the corrugated inner insertion portion 20a and the outer tube insertion portion 30e and which connects the inner corrugated insertion portion 20a and the outer tube insertion portion 30e has a diameter larger than the inner corrugated insertion portion 20a. In order to connect the large external tube insertion portion 30e and the corrugated internal insertion portion 20a, the diameter is gradually reduced from the external tube insertion portion 30e toward the internal corrugated insertion portion 20a.

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10e configured in this way, the adhesive piece 34 formed on the inner surface of the insertion portion main body 31e is attached to the smooth outer peripheral surface of the hard tube 3. The outer tube insertion portion 30e is fitted on the end of the hard tube 3 while keeping it in close contact with the hard tube 3. As shown in FIG.
In addition, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from the end portion so that the fitting portion 22a is inserted into the inner surface side of the convex portion 2a which is concave on the inner surface side of the corrugated pipe 2.

As described above, the inner corrugated insertion portion 20a is inserted inside from the end of the corrugated tube 2, and the outer tube insertion portion 30e is inserted so as to fit on the end of the hard tube 3. , the connecting structure 1e (1) can be configured by connecting the corrugated tube 2 and the hard tube 3 via the tubular body connector 10e.

As shown in FIG. 8(b), the tubular body connector 10f (10) includes the above corrugated extra-insertion attachment portion 20b (20), the above-described extra tube insertion attachment portion 30e (30), and a corrugated extra-attachment attachment. A connecting portion 40f is disposed between the portion 20b and the tube extra-insertion attachment portion 30e and connects the corrugated extra-corrugated attachment portion 20b and the tube extra-insertion attachment portion 30e.

The connecting portion 40f, which is arranged between the corrugated external insertion portion 20b and the tube external insertion portion 30e and connects the corrugated external insertion portion 20b and the tube external insertion portion 30e, is slightly larger than the corrugated external insertion portion 20b. In order to connect the corrugated externally inserted portion 20b with the tube externally inserted portion 30e having a large diameter, the tube externally inserted portion 30e is gradually reduced in diameter toward the corrugated externally inserted portion 20b. .

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10f configured in this way, the adhesion piece 34 formed on the inner surface of the insertion portion main body 31e is attached to the smooth outer peripheral surface of the hard tube 3. The outer tube insertion portion 30e is fitted on the end of the hard tube 3 while keeping it in close contact with the hard tube 3. As shown in FIG.
In addition, the corrugated outer insertion portion 20b is fitted to the end portion of the corrugated pipe 2 so that the fitting portion 22b is fitted into the concave portion 2b formed on the outer surface side of the corrugated pipe 2. As shown in FIG.

As described above, the corrugated externally-inserted portion 20b is inserted so as to fit over the end of the corrugated tube 2, and the tube externally-inserted portion 30e is inserted so as to fit over the end of the hard tube 3. By doing so, the connection structure 1f(1) can be configured by connecting the corrugated tube 2 and the hard tube 3 via the tubular body connector 10f.

As shown in FIG. 8(c), the tubular body connector 10g (10) includes the above-described corrugated inserting portion 20a (20) and the tube inserting portion 20a (20) inserted inside the rigid tube 3 from the end thereof. an insertion portion 30g (30) and a connecting portion 40g disposed between the corrugated inner insertion portion 20a and the tube inner insertion portion 30g and connecting the corrugated inner insertion portion 20a and the tube inner insertion portion 30g; have.

The in-tube insertion portion 30g, which is inserted into the hard tube 3 from its end, is composed of a cylindrical insertion portion main body 31g which is inserted into the hard tube 3 from its end, and an insertion portion main body 31g. A contact piece 34g protrudes radially inward from the inner surface.

Similar to the fitting portion 22a of the corrugated inner fitting portion 20a, the fitting piece 34g is formed continuously in the circumferential direction in the fitting portion main body 31g and has a tapered cross-sectional shape that tapers toward the tip in the projecting direction. It is formed in a triangular shape.

Further, the contact piece 34g formed with a tapered cross-sectional shape has a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted rearward in the insertion direction when the in-tube insertion portion 30g and the hard tube 3 are inserted. is formed by

Specifically, the contact piece 34g having a triangular cross-section is formed to have a triangular cross-section that slopes from the tip of the insertion portion main body 31g toward the connecting portion 40 side. Therefore, the inclination direction of the contact piece 34g and the fitting portion 22a are opposite to each other in the longitudinal direction L. As shown in FIG.

A connecting portion 40g which is arranged between the corrugated insertion portion 20a and the tube inner insertion portion 30g and which connects the corrugated inner insertion portion 20a and the tube inner insertion portion 30g is an inner corrugated insertion portion having the same diameter. It is formed in a substantially cylindrical shape in order to connect 20a and the in-tube inserting portion 30g.

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10g configured in this way, the adhesive piece 34g formed on the outer surface of the insertion portion main body 31g is attached to the smooth inner circumference of the hard tube 3. The in-tube inserting portion 30g is inserted into the hard tube 3 from the end thereof while being brought into close contact with the surface.
In addition, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from the end portion so that the fitting portion 22a is inserted into the inner surface side of the convex portion 2a which is concave on the inner surface side of the corrugated pipe 2.

As described above, by inserting the intra-corrugated insertion portion 20a into the corrugated tube 2 from its end and inserting the intra-tube insertion portion 30g into the hard tube 3 from its end, the tubular body A connection structure 1g(1) can be configured by connecting the corrugated tube 2 and the hard tube 3 via the connector 10g.

As shown in FIG. 8(d), the tubular body connector 10h (10) includes the above corrugated extra-attachment portion 20b (20), the above-described inner tube insertion portion 30g (30), and the corrugated extra-attachment portion. A connecting portion 40h is disposed between the portion 20b and the tube-inserted portion 30g and connects the corrugated externally-inserted portion 20b and the tube-inserted portion 30g.

A connecting portion 40h that is arranged between the corrugated outer insertion portion 20b and the tube inner insertion portion 30g and connects the corrugated outer insertion portion 20b and the inner tube insertion portion 30g has a diameter larger than the inner tube insertion portion 30g. In order to connect the large corrugated outer insertion portion 20b and the tube inner insertion portion 30g, the corrugated outer insertion portion 20b is gradually tapered toward the tube inner insertion portion 30g.

In order to connect the corrugated tube 2 and the hard tube 3 by using the tubular body connector 10h configured in this way, the adhesive piece 34g formed on the outer surface of the insertion portion main body 31g is attached to the smooth inner circumference of the hard tube 3. The in-tube inserting portion 30g is inserted into the hard tube 3 from the end thereof while being brought into close contact with the surface.
In addition, the corrugated outer insertion portion 20b is fitted to the end portion of the corrugated pipe 2 so that the fitting portion 22b is fitted into the concave portion 2b formed on the outer surface side of the corrugated pipe 2. As shown in FIG.

As described above, the corrugated externally-inserted portion 20b is inserted so as to fit over the end of the corrugated tube 2, and the in-tube-inserted portion 30g is inserted into the hard tube 3 from its end. By attaching them, the corrugated tube 2 and the hard tube 3 can be connected via the tubular body connector 10h to configure the connecting structure 1h(1).

Next, connection structures 1i to 1k in which the corrugated tube 2 and the hard tube 3 are connected by tubular body connectors 10i to 10k will be described with reference to FIG.
FIG. 9 shows an explanatory diagram of cross-sectional views of connection structures 1i to 1k in which corrugated pipes 2 are connected to each other by different tubular body connectors 10i to 10k. Specifically, FIG. 9(a) shows a sectional view of a connection structure 1i connected by a tubular body connector 10i, and FIG. 9(b) shows a sectional view of a connection structure 1j connected by a tubular body connector 10j. , FIG. 9(c) shows a sectional view of a connecting structure 1k connected by a tubular body connector 10k.

The connection structures 1a to 1h described above are configured by connecting the corrugated tube 2 and the hard tube 3 with the tubular body connectors 10a to 10h. In addition, the corrugated tubes 2 are connected to each other by separate tubular body connectors 10i to 10k.

As shown in FIG. 9(a), in the tubular body connector 10i (10) for connecting the corrugated pipes 2, the above-described inner corrugated insertion portions 20a (20) are arranged symmetrically in the longitudinal direction L, They are connected at a connecting portion 40i.
A connecting portion 40i that is arranged between the corrugated insertion portions 20a and connects the corrugated insertion portions 20a is formed in a cylindrical shape.

In order to connect the corrugated pipes 2 using the tubular body connector 10i configured in this manner, the fitting portion 22a is fitted to the inner surface side of the convex portion 2a which is concave on the inner surface side of both corrugated pipes 2. The corrugated inner insertion portion 20a is inserted from the end portion of the corrugated pipe 2 into the corrugated pipe 2 as shown in FIG.
As described above, the corrugated pipes 2 are connected to each other via the tubular body connector 10i by inserting and inserting the corrugated inner insertion parts 20a from the ends of both corrugated pipes 2 into the connecting structure. Body 1i(1) can be constructed.

As shown in FIG. 9(b), the tubular body connector 10j (10) for connecting the corrugated pipes 2 has the corrugated extra-insertion attachment portions 20b (20) arranged symmetrically in the longitudinal direction L. They are connected at a connecting portion 40j.
A connecting portion 40j, which is arranged between the corrugated outer insertion portions 20b and connects the corrugated outer insertion portions 20b, is formed in a cylindrical shape.

In order to connect the corrugated pipes 2 using the tubular body connector 10j configured as described above, the outer corrugated pipes 2 are bent so that the fitting portion 22b is fitted into the concave portion 2b formed on the outer surface side of both the corrugated pipes 2. The insertion portion 20b is inserted so as to fit over the end portion of the corrugated pipe 2. As shown in FIG.

As described above, the corrugated pipes 2 are connected to each other via the tubular body connector 10j by inserting the corrugated extra-inserting parts 20b so as to fit over the ends of both the corrugated pipes 2, thereby connecting the corrugated pipes 2 together. A body 1j(1) can be constructed.

A tubular body connector 10k (10) for connecting the corrugated pipes 2 is, as shown in FIG. They are arranged symmetrically in the longitudinal direction L and are connected by a connecting portion 40k.

A connecting portion 40k which is arranged between the corrugated inner insertion portion 20a and the corrugated extra-inserted portion 20b and which connects the corrugated inner-inserted portion 20a and the corrugated extra-inserted portion 20b has a diameter larger than the corrugated outer insertion portion 20a. In order to connect the large external corrugated insertion portion 20b and the internal corrugated insertion portion 20a, the diameter is gradually reduced from the external corrugated insertion portion 20b toward the internal corrugated insertion portion 20a.

In order to connect the corrugated pipes 2 using the tubular body connector 10k configured in this manner, the fitting portion 22a is fitted into the inner surface side of the convex portion 2a which is concave on the inner surface side of the corrugated pipe 2. The corrugated inner insertion portion 20a is inserted into the interior from one end of the corrugated pipe 2 and attached.

In addition, the corrugated external insertion portion 20b is externally fitted to the end portion of the other corrugated pipe 2 so that the fitting portion 22b is fitted into the concave portion 2b on the outer surface side of the corrugated pipe 2.
As described above, the inner corrugated insertion portion 20a is inserted from the end portion of one corrugated pipe 2 and attached, and the outer corrugated insertion portion 20b is fitted to the other end portion of the corrugated pipe 2. By inserting them in such a manner, the connection structure 1k(1) can be configured by connecting the corrugated tubes 2 to each other via the tubular body connector 10k.

As described above, the tubular body connector 10 (10a to 10k) that configures the connection structure 1 (1a to 1k) by connecting the corrugated tube 2 through which the electric wire 100 is inserted and the hard tube 3 (corrugated tube 2). ) consists of a corrugated insertion part 20 inserted inside the end of the corrugated pipe 2 or externally inserted outside the end of the corrugated pipe 2, and a hard tube 3 (corrugated pipe 2) A tube inserting portion 30 (corrugated pipe inserting portion 20) is inserted and inserted inside the end of the hard tube 3 (corrugated pipe 2). The corrugated pipe 2 has convex portions 2a and concave portions 2b alternately arranged in the longitudinal direction L. A fitting portion 22 is provided that protrudes radially from the attachment portion main body 21 and enters the inner surface side of the convex portion 2a of the corrugated pipe 2 or the concave portion 2b.

Therefore, it is possible to easily connect the corrugated tube 2 and the hard tube 3 (corrugated tube 2) with the tubular body connector 10 (10a to 10k) having a simple structure.
More specifically, the corrugated insertion part 20 inserted into the corrugated pipe 2 in the tubular body connector 10 (10a to 10k) for connecting the corrugated pipe 2 and the hard tube 3 (corrugated pipe 2) has a tubular shape. A fitting portion 22 that protrudes radially from the insertion portion main body 21 and enters the inner surface side of the convex portion 2a or the concave portion 2b of the corrugated pipe 2 is provided. Therefore, when the corrugated insertion portion 20 is inserted into the end portion of the corrugated pipe 2, the fitting portion 22 enters the inner surface side of the convex portion 2a or the concave portion 2b of the corrugated pipe 2, and the tubular body connector 10 (10a to 10k) is inserted. It can be firmly connected to the corrugated pipe 2.

By inserting the tube inserting portion 30 (corrugated pipe inserting portion 20) into the end portion of the hard tube 3 (corrugated pipe 2), the corrugated pipe 2 is connected via the tubular body connector 10 (10a to 10k). A connection structure 1 (1a to 1k) can be configured by connecting with a hard tube 3. FIG.

The fitting portions 22 (22a, 22b) are continuously formed in the circumferential direction of the insertion portion main body 21 (21a, 21b), and are tapered from the side of the insertion portion main body 21 toward the distal end in the projecting direction. It is formed in a cross-sectional shape.
Therefore, the corrugated insertion portion 20 (20a, 20b) can be easily inserted into the end portion of the corrugated pipe 2 by fitting the fitting portion 22 into the inner surface side of the convex portion 2a or the concave portion 2b of the corrugated pipe 2. .

More specifically, since the fitting portion 22 is formed continuously in the circumferential direction of the fitting portion body 21 , the fitting portion 22 is fitted into the inner surface side of the projection 2 a or the recess 2 b to connect the corrugated fitting portion 20 to the corrugated pipe 2 . There is a possibility that it will become insertion resistance when it is inserted into the end of the connector, making it difficult to insert.

However, since the fitting portion 22 has a tapered cross-sectional shape, the distal end side of the fitting portion 22 is deformed when it is inserted into the end portion of the corrugated pipe 2, so that the insertion resistance when it is inserted into the end portion of the corrugated pipe 2 is reduced. It can be lowered, and the corrugated insertion part 20 can be easily inserted into the end of the corrugated pipe 2. - 特許庁

In addition, since the fitting portion 22 is formed continuously in the circumferential direction in the fitting portion main body 21, the connection structure 1 (1a to 1k) fitted into the inner surface side of the convex portion 2a or the recessed portion 2b of the corrugated pipe 2 is inserted. In this state, water can be stopped between the corrugated pipe 2 and the corrugated insertion portion 20 .

In addition, the fitting portion 22 formed with a tapered cross-sectional shape is formed with a tapered cross-sectional shape with different inclination angles in the insertion direction so that the corrugated insertion portion 20 can be tilted rearward in the insertion direction when the corrugated insertion portion 20 is inserted into the corrugated pipe 2. It is
Therefore, it becomes easier to insert and less likely to come off, and the connection state can be stably maintained.

More specifically, since the fitting portion 22 tilts rearward in the insertion direction during insertion, it is easier to mount. When the fitting portion 22 is fitted into the inner surface side of the convex portion 2a or the concave portion 2b of the corrugated pipe 2, the inclination angle of the insertion direction in the tapered cross-sectional shape is different. Therefore, the fitting portion 22 is difficult to deform in the extraction direction, and the corrugated insertion portion 20 in the inserted state can be prevented from being accidentally extracted from the end portion of the corrugated pipe 2 . Therefore, the connection state in connection structure 1 (1a to 1k) can be stably maintained.

The hard tube 3 is composed of a smooth tube having smooth inner and outer surfaces, and the tube inserting portion 30 to be inserted into the hard tube 3 has a tubular inserting portion main body 31. The connection structure 1 can be configured by inserting the tube insertion portion 30 into the hard tube 3 of a different type from 2 and connecting the corrugated tube 2 and the hard tube 3 via the tubular body connector 10. .

Further, in the connection structure 1 (1a, 1b, 1c, 1d) described above, the tube insertion portion 30 is arranged between the insertion portion main body 31 and the smooth surface of the hard tube 3, and is in close contact with both. Since the ring-shaped water stop ring 33 for stopping water is provided, the water stop ring is provided between the insertion portion body 31 of the tube insertion portion 30 and the smooth surface of the hard tube 3 and adheres to both. Since the water stop ring 33 is arranged, water can be stopped between the hard tube 3 and the tube insertion portion 30 in the inserted state.

Further, in the connection structure 1 (1a, 1b, 1c, 1d), the water stop ring 33 arranged between the insertion portion main body 21 (insertion portion main body 31) and the smooth surface is in close contact with both. At least the frictional resistance between the smooth surface and the water stop ring 33 can stably maintain the insertion state between the tube insertion portion 30 and the hard tube 3 .

Further, in the connection structure 1 (1e, 1f, 1g, 1h) described above, the tube insertion portion 30 protrudes radially from the insertion portion main body 31, and has a tight contact piece 34 that adheres tightly to the smooth surface of the hard tube 3. A contact piece 34 provided on the insertion portion main body 31 of the tube insertion portion 30 is in close contact with the smooth surface of the hard tube 3 , so that there is no gap between the hard tube 3 and the tube insertion portion 30 in the inserted state. water can be stopped.
Further, in the connection structure 1 (1i, 1j, 1k) described above, the corrugated pipes 2 can be easily and reliably connected to each other by the tubular body connector 10 (10i, 10j, 10k).

In addition, in the connection structure 1 (1a, 1c, 1e, 1g, 1i, 1j, 1k) described above, the corrugated insertion portion 20 is configured to be inserted into the end portion of the corrugated pipe 2. The fitting portion 22 protrudes radially outward from the outer peripheral surface of the insertion portion main body 21 and enters the inner surface side of the convex portion 2 a of the corrugated pipe 2 .

Therefore, by inserting the corrugated insertion portion 20 from the end portion of the corrugated pipe 2 into the inside, the fitting portion 22 protruding radially outward from the outer peripheral surface of the insertion portion main body 21 is aligned with the inner surface of the convex portion 2a of the corrugated pipe 2. The corrugated insertion part 20 can be inserted into the end of the corrugated pipe 2 by entering the side.

In addition, since the corrugated insertion portion 20 is inserted into the corrugated pipe 2 from the end thereof, the corrugated insertion portion 20 can be inserted into the corrugated pipe 2 without increasing the diameter of the corrugated pipe 20. be able to.

In addition, in the connection structure 1 (1b, 1d, 1f, 1h, 1k) described above, the corrugated extra-insertion attachment portion 20b has a configuration in which the end portion of the corrugated pipe 2 is inserted and attached. 22 protrudes radially inward from the inner peripheral surface of the insertion portion main body 21 and enters the concave portion 2b of the corrugated pipe 2 .

Therefore, by inserting the end portion of the corrugated tube 2 into the corrugated external insertion portion 20b, the fitting portion 22b protruding radially inward from the inner peripheral surface of the insertion portion main body 21b fits into the recessed portion 2b of the corrugated pipe 2. It is possible to insert the corrugated outer insertion portion 20b and the end portion of the corrugated pipe 2 by entering.
In addition, since the end of the corrugated pipe 2 is inserted into the outer corrugated pipe fitting portion 20b, the outer corrugated pipe fitting portion 20b and the end portion of the corrugated pipe 2 are inserted without enlarging the diameter of the corrugated pipe 2. can do.

In correspondence with the configuration of this invention and the above-described embodiments,
The first tubular body of the present invention corresponds to the corrugated pipe 2,
and so on,
The second tubular body corresponds to the corrugated tube 2 or the rigid tube 3,
The tubular body connector corresponds to the tubular body connector 10,
The first insertion portion corresponds to the corrugated insertion portion 20,
The second insertion portion corresponds to the tube insertion portion 30 or the corrugated insertion portion 20,
The corrugated pipe corresponds to the corrugated pipe 2,
The corrugated pipe insertion part corresponds to the corrugated pipe insertion part 20,
The insertion section main body corresponds to the insertion section main body 21 or the insertion section main body 31,
The concave portion corresponds to the inner surface side of the convex portion 2a or the concave portion 2b,
The fitting portion corresponds to the fitting portion 22,
The smooth tube corresponds to the hard tube 3,
The smooth tube insertion portion corresponds to the tube insertion portion 30,
The water stop ring corresponds to the water stop ring 33,
The contact portion corresponds to the contact piece 34,
The concave portion of the inner peripheral surface corresponds to the inner surface side of the convex portion 2a,
The recessed portion of the outer peripheral surface corresponds to the recessed portion 2b,
The invention is not limited to only the embodiments described above, but many embodiments can be obtained.

In the above description, the intra-corrugated insertion portion 20a of the tubular body connectors 10 to 10j has the insertion portion main body 21 and the insertion portion 22 integrally formed. The fitting portion 22 may be configured to be detachable from the portion body 21 . Separate tubular body connectors 10Xa to 10Xd in which the fitting portion 22 is detachably attached to the insertion portion main body 21 will be described below.

FIG. 10 shows an explanatory view of separate tubular body connectors 10Xa to 10Xd by exploded sectional views. Specifically, FIG. 10(a) shows a sectional view of a separate tubular body connector 10Xa, FIG. 10(b) shows a sectional view of a separate tubular body connector 10Xb, and FIG. A cross-sectional view of the body connector 10Xc is shown, and FIG. 10(d) shows a cross-sectional view of the separate tubular body connector 10Xd.

As shown in FIG. 10(a), the separate type tubular body connector 10Xa is a separate type of the tubular body connector 10, which is composed of an inner corrugated insertion portion 20a and an outer tube insertion portion 30a. The fitting portion 22a is fitted to the outer surface of the insertion portion main body 21a of the fitting portion 20a.
Specifically, a fitting groove 211a for fitting the fitting portion 22a is provided on the outer surface of the fitting portion main body 21a of the corrugated fitting portion 20a.

The fitting portion 22a fitted to the fitting portion main body 21 has a tubular fitting tubular portion 221a, and the fitting tubular portion 221a is provided with the fitting portion 22a on the outer surface thereof.
In the separate tubular body connector 10Xa configured as described above, the fitting tubular portion 221a is fitted into the fitting groove 211a provided on the outer surface of the fitting portion main body 21a to assemble the fitting portion 22a to the fitting portion main body 21a. It consists of

As shown in FIG. 10(b), the separate type tubular body connector 10Xb is a separate type of the tubular body connector 10b, which is composed of a corrugated externally inserted portion 20b and a tube externally inserted portion 30a. The fitting portion 22b is fitted to the inner surface of the insertion portion main body 21b of the fitting portion 20b.
Specifically, a fitting groove 211b for fitting the fitting portion 22b is provided on the inner surface of the fitting portion main body 21b of the external corrugated fitting portion 20b.

The fitting portion 22b fitted to the fitting portion main body 21b has a cylindrical fitting tube portion 221b, and the fitting portion 22b is provided on the outer surface of the fitting tube portion 221b.
In the separate tubular body connector 10Xb configured as described above, the fitting tubular portion 221b is fitted into the fitting groove 211b provided on the inner surface of the fitting portion main body 21b to assemble the fitting portion 22b to the fitting portion main body 21b. It consists of

As shown in FIG. 10(c), the separate type tubular body connector 10Xc is a separate type of the tubular body connector 10c composed of an inner corrugated insertion portion 20a and an outer tube insertion portion 30a. The fitting portion 22 is fitted to the outer surface of the insertion portion main body 21 of the fitting portion 20a.
Specifically, a fitting groove 211a for fitting the fitting portion 22a is provided on the outer surface of the fitting portion main body 21a of the corrugated fitting portion 20a.

The fitting portion 22a fitted to the fitting portion main body 21a has a tubular fitting tubular portion 221a, and the fitting tubular portion 221a is provided on the outer surface of the fitting tubular portion 221a.
In the separate tubular body connector 10Xc configured as described above, the fitting tubular portion 221a is fitted into the fitting groove 211a provided on the outer surface of the fitting portion main body 21a, and the fitting portion 22a is assembled to the fitting portion main body 21. It consists of

As shown in FIG. 10(d), the separate type tubular body connector 10Xd is a separate type of the tubular body connector 10d, which is composed of a corrugated outer insertion portion 20b and an inner tube insertion portion 30c. The fitting portion 22b is fitted to the inner surface of the insertion portion main body 21b of the fitting portion 20b.
Specifically, a fitting groove 211b for fitting the fitting portion 22b is provided on the inner surface of the fitting portion main body 21b of the external corrugated fitting portion 20b.

The fitting portion 22b fitted to the fitting portion main body 21b has a cylindrical fitting tube portion 221b, and the fitting portion 22b is provided on the outer surface of the fitting tube portion 221b.
In the separate tubular body connector 10Xd configured as described above, the fitting tubular portion 221b is fitted into the fitting groove 211b provided on the inner surface of the fitting portion main body 21b to assemble the fitting portion 22b to the fitting portion main body 21b. It consists of

As described above, the insertion portion main body 21 and the fitting portion 22 are configured separately, and the separate tubular body connectors 10Xa to 10Xd, which are configured by assembling the insertion portion main body 21 and the fitting portion 22, are composed of corrugated pipes 2 The insertion part main body 21 and the insertion part 22 are made of materials with suitable properties, for example, the insertion part 22 that fits into the concave part is made of a material that is highly deformable, unlike the insertion part main body 21. It is possible to configure the tubular body connector 10 that satisfies the required performance.

In the above description, the separate tubular body connectors 10Xa to 10Xd, which are separate types of the tubular body connectors 10a to 10d, are described. It may be configured separately in the same way as

In the above description, the corrugated tube 2 and the hard tube 3 or the corrugated tubes 2 are connected to each other by the tubular body connector 10 to form the connection structure 1 through which the electric wire 100 can be inserted. The electric wire 100 may be configured to pass through a branched portion where a branch line branches off from the main line.
Note that FIG. 11 shows a sectional view of a connection structure 1Yj in which the corrugated tube 2 and the hard tube 3 are connected by a tubular body connector 10Yj of another mode.

In order to insert the branched portion of the electric wire 100, for example, the tubular body connector 10Yj is provided with the branch wire insertion portion 41 for inserting the branch wire into the connecting portion 40j of the tubular body connector 10j. . Then, in the connection structure 1Yj in which the corrugated pipe 2 is inserted into each of the corrugated insertion portions 20a of the tubular body connector 10Yj, the main line is passed through the corrugated pipe 2 straddling the tubular body connector 10Yj, and the branch wire is inserted. It can be configured by drawing a branch line from the portion 41 .
When the branch wire pulled out from the branch wire insertion portion 41 is inserted through the corrugated pipe 2 or the hard tube 3, the branch wire insertion portion 41 may be configured by the corrugated insertion portion 20 or the tube insertion portion 30. .

In the above description, the corrugated tube 2 and the hard tube 3 connected via the tubular body connector 10, or the corrugated tubes 2, have substantially the same diameter, but they may have different diameters. The inner insertion portion 20a and the tube insertion portion 30 are formed to have diameters matching the corrugated tube 2 and the hard tube 3, respectively, and the inner corrugated insertion portion 20a and the tube insertion portion 20a are formed according to the respective diameters. It is only necessary to connect the portion 30 with the connecting portion 40 .

Furthermore, the fitting portion 22 is continuous along the entire circumference of the insertion portion main body 21, but may be divided at predetermined intervals in the circumferential direction. In this case, the water stopping performance of the fitting portion 22 or the fitting portion 22a is lowered, but by using the water stopping ring 33 together, the water stopping performance can be ensured.

The fitting portion 22 formed with a tapered cross-sectional shape has a tapered cross-sectional shape with different inclination angles in the insertion direction so that the fitting portion 22 can be tilted rearward in the insertion direction when the corrugated pipe 2 is inserted into the corrugated insertion portion 20. Although formed, it may have an isosceles triangular cross-section.

2 Corrugated tube 2a Convex portion 2b Concave portion 3 Hard tube 10 Tubular body connector 20 Corrugated insertion portion 21 Insertion portion main body 22 Insertion portion 30 Tube insertion portion 31 Insertion portion main body 32 ...Water stop ring 34...Adhesion piece 100...Electric wire

Claims (9)

A tubular body connector for connecting a first tubular body through which an electric wire is inserted and a second tubular body,
a first insertion portion that is inserted inside the end of the first tubular body or that is externally inserted outside the end of the first tubular body;
a second insertion part that is inserted inside the end of the second tubular body or that is externally inserted outside the end of the second tubular body,
At least one of the first tubular body and the second tubular body is a corrugated tube in which unevenness is alternately arranged in the longitudinal direction,
Among the first insertion portion and the second insertion portion, the corrugated pipe insertion portion that is inserted into the tubular body formed of the corrugated pipe is
a tubular insertion portion main body;
and a fitting portion projecting radially from the fitting portion main body and entering into the concave portion of the corrugated tube. The inset part is
Continuously formed in the circumferential direction in the insertion portion main body,
2. The connector for tubular body according to claim 1, which is formed in a tapered cross-sectional shape that tapers from the insertion portion main body side toward the tip in the projecting direction. The fitting portion formed with a tapered cross-sectional shape,
3. The fitting for connecting tubular bodies according to claim 2, wherein said insertion part and said tubular body are formed in a tapered cross-sectional shape with different inclination angles in the insertion direction so as to be tiltable rearward in the insertion direction. The first tubular body is composed of the corrugated tube,
The second tubular body is composed of a smooth tube having at least one of an inner surface and an outer surface that is smooth,
the corrugated pipe insertion portion is the first insertion portion that is inserted into the first tubular body formed of the corrugated pipe;
4. Among claims 1 to 3, wherein the second insertion section to be inserted into the second tubular body made of a smooth tube is a smooth tube insertion section having a tubular insertion section main body. The tubular body connection tool according to any one of the above. 4. A ring-shaped water stop ring is provided between the main body of the smooth tube insertion portion and the smooth surface of the second tubular body, and is in close contact with both to stop water. The tubular body connector according to . The smooth tube insertion portion is
6. The connector for tubular bodies according to claim 4, further comprising a contact portion protruding radially from said insertion portion main body and brought into close contact with a smooth surface of said second tubular body. Both the first tubular body and the second tubular body are composed of the corrugated tube,
4. The connector for tubular bodies according to claim 1, wherein both said first insertion portion and said second insertion portion are said corrugated tube insertion portion. The corrugated tube insertion portion is configured to be inserted by inserting into an end portion of the tubular body,
8. The connector for tubular bodies according to claim 1, wherein the fitting portion protrudes radially outward from the outer peripheral surface of the insertion portion main body and enters the concave portion of the inner peripheral surface of the corrugated tube. The corrugated tube insertion portion is configured to be inserted by inserting the end portion of the tubular body inside,
8. The connector for tubular bodies according to claim 1, wherein the fitting portion protrudes radially inward from the inner peripheral surface of the insertion portion main body and enters the concave portion of the outer peripheral surface of the corrugated tube.

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