Tubular body connector

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

[Technical field]

[0001] The present invention relates to a tubular body connector that connects a corrugated tube, through which electric wires of a wire harness or the like are inserted, to another tubular body. [Background technology]

[0002] 2. Description of the Related Art Generally, corrugated pipes through which electric wires can be inserted are widely used as exterior parts for protecting electric wires in wire harnesses and the like. For example, the corrugated pipes have been connected to each other using a connection structure disclosed in Patent Document 1.

[0003] Specifically, the connection structure disclosed in Patent Document 1 involves butting two corrugated pipes together with packings attached, bringing the outer surfaces of the packings into contact and pressing them against each other, attaching a fixing member to the outside of the connection portion, and tightening it, thereby pressing part of the packing against the ridges of the corrugated pipes to connect them. However, the above-mentioned connection structure is complicated and requires a lot of work to make the connection.

[0004] Furthermore, as an exterior product for protecting electric wires, a smooth tube called a hard tube may be used as a tubular body of a different kind from the corrugated tube. For example, when wiring an electric wire in a substantially straight line, the electric wire is inserted into a smooth tube which is less likely to bend, whereas when wiring the electric wire in a bent state, the electric wire is inserted into a flexible corrugated tube. Although there is a demand to connect these exterior components together, the above-mentioned connection structure was not able to connect different types of exterior bodies. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-351456 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a tubular body connector that can easily connect a corrugated pipe to another tubular body with a simple structure. [Means for solving the problem]

[0007] The present invention provides a tubular body connector for connecting a first tubular body and a second tubular body through which an electric wire is inserted, comprising: The above A first insertion part that is inserted into the inside of the end of the first tubular body or inserted outside the end of the first tubular body; The above and a second insertion part which is inserted inside the end of a second tubular body or 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 having projections and recesses arranged alternately in the longitudinal direction, and the corrugated tube insertion part of the first insertion part and the second insertion part which is inserted into the tubular body made of the corrugated tube is provided with a cylindrical insertion part main body and an insertion part which protrudes radially from the insertion part main body and fits into a recess of the corrugated tube. The fitting portion is formed continuously in the circumferential direction in the insertion portion main body, and is formed with a tapered cross-sectional shape that tapers from the insertion portion main body side toward the tip in the protruding direction, and the fitting portion formed with the tapered cross-sectional shape is formed with a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when the corrugated pipe insertion portion and the tubular body are inserted. It is characterized by:

[0008] The fitting portion may protrude radially inward from the insertion portion body or radially outward from the insertion portion body. The fitting portion protruding radially inward from the insertion portion body fits into a recess on the outer surface of the corrugated tube, and the fitting portion protruding radially outward from the insertion portion body fits into a recess on the inner surface of the corrugated tube.

[0009] At least one of the first tubular body and the second tubular body is a corrugated pipe having projections and recesses arranged alternately in the longitudinal direction, and the other may be a corrugated pipe of the same type, or may be a tubular body of a different type from the corrugated pipe, such as a smooth pipe. The electric wire may be, for example, a single electric wire such as a coated electric wire, or a plurality of electric wires integrated together such as a pair of electric wires.Furthermore, the electric wire may be a wire harness in which a plurality of electric wires are bundled together.

[0010] The insertion portion body and the fitting portion constituting the corrugated pipe insertion portion described above may be integral with each other, or the insertion portion body and the fitting portion may be constructed as separate bodies which are then assembled together. The fitting portion may be continuous around the entire circumference, or a plurality of fitting portions may be arranged at predetermined intervals in the circumferential direction.

[0011] According to the present invention, a corrugated pipe can be easily connected to another tubular body using a tubular body connector having a simple structure. In detail, the corrugated tube insertion part, which is inserted into the tubular body made of the corrugated tube among the first and second insertion parts of the tubular body connector connecting the first and second tubular bodies, has a cylindrical insertion part main body and an insertion part that protrudes radially from the insertion part main body and fits into a recess of the corrugated tube, so that when the corrugated tube insertion part is inserted into the end of the tubular body made of the corrugated tube, the insertion part fits into the recess of the corrugated tube, and the tubular body connector can be firmly connected to the corrugated tube. Then, by inserting the other insertion part into the end of the other tubular body, the corrugated tube and the other tubular body can be connected via the tubular body connector.

[0012] Also, The fitting portion is formed continuously in the circumferential direction of the insertion portion body, and is formed with a tapered cross-sectional shape that tapers from the insertion portion body side toward the tip in the protruding direction. Is . This means: The corrugated pipe insertion portion can be easily inserted into the end of the corrugated pipe by fitting the fitting portion into the recess of the corrugated pipe.

[0013] In detail, since the insertion portion is formed continuously in the circumferential direction on the insertion portion main body, there is a risk that there will be resistance to insertion when inserting the insertion portion into the recess and inserting the corrugated pipe insertion portion into the end of the corrugated pipe, making insertion difficult.

[0014] However, since the insertion portion has a tapered cross-sectional shape, the tip side of the insertion portion deforms when inserted into the end of the corrugated pipe, thereby reducing the insertion resistance when inserting it into the end of the corrugated pipe and making it easy to insert the corrugated pipe insertion portion into the end of the corrugated pipe.

[0015] Furthermore, since the fitting portion is formed continuously in the circumferential direction on the insertion portion main body, when the fitting portion is fitted into the recess of the corrugated pipe, water can be sealed between the corrugated pipe and the corrugated pipe insertion portion.

[0016] Furthermore, The insertion portion formed with a tapered cross-sectional shape is Corrugated Pipe The insertion portion is formed with a tapered cross-sectional shape having a different inclination angle in the insertion direction so that the insertion portion can be tilted backward in the insertion direction when the tubular body is inserted into the insertion portion. is. This means: This makes insertion easier and also makes it less likely to come loose, allowing the connection to be maintained stably.

[0017] More specifically, the fitting portion tilts backward in the insertion direction when it is inserted, making it easier to attach. When the fitting portion is fitted into the recess of the corrugated pipe, the inclination angle in the insertion direction of the tapered cross-sectional shape is different, so the fitting portion is less likely to deform in the removal direction, and the corrugated pipe insertion portion in the inserted state can be prevented from accidentally coming out of the end of the corrugated pipe. Therefore, the connection state can be stably maintained.

[0018] In another aspect of the present invention, the first tubular body may be made of the corrugated tube, and the second tubular body may be made of a smooth tube having at least one of its inner and outer surfaces being a smooth surface, the first insertion portion inserted into the first tubular body made of the corrugated tube may be the corrugated tube insertion portion, and the second insertion portion inserted into the second tubular body made of a smooth tube may be a smooth tube insertion portion having a cylindrical insertion portion main body. According to this invention, the smooth tube insertion portion can be inserted into a smooth tube which is a different type from the corrugated tube, and the corrugated tube and the smooth tube can be connected via the tubular body connector.

[0019] In addition, as an aspect of the present invention, a ring-shaped water-stopping ring may be provided, which is arranged between the insertion portion main body of the smooth tube insertion portion and the smooth surface of the second tubular body, and fits tightly to both to stop water passing through. According to this invention, a ring-shaped water-stopping ring is arranged between the insertion portion main body in the smooth tube insertion portion and the smooth surface of the second tubular body, and tightly adheres to both to stop water from entering, thereby making it possible to stop water from entering between the smooth tube and the smooth tube insertion portion when in the inserted state.

[0020] In addition, the water-stopping ring placed between the insertion portion main body and the smooth surface is in close contact with both, so that the insertion state between the smooth tube insertion portion and the smooth tube can be stably maintained at least by the frictional resistance between the smooth surface and the water-stopping ring.

[0021] As a further 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 that contacts closely with the smooth surface of the second tubular body. According to this invention, the adhesion portion provided on the insertion portion main body of the smooth tube insertion portion adheres to the smooth surface of the second tubular body, so that when inserted, water can be prevented from entering between the smooth tube and the smooth tube insertion portion.

[0022] As another aspect of the present invention, both the first tubular body and the second tubular body may be formed of the corrugated pipe, and both the first insertion portion and the second insertion portion may be the corrugated pipe insertion portion. According to the present invention, the corrugated pipes can be connected to each other easily and reliably.

[0023] In another aspect of the present invention, the corrugated pipe insertion portion is configured to be inserted into the inside of the end of the tubular body, and the fitting portion may protrude radially outward from the outer peripheral surface of the insertion portion main body and fit into the recess on the inner peripheral surface of the corrugated pipe.

[0024] According to this invention, by inserting the corrugated pipe insertion part into the inside from the end of the corrugated pipe, the fitting part protruding radially outward from the outer circumferential surface of the insertion part main body can enter the recess on the inner circumferential surface of the corrugated pipe, thereby allowing the corrugated pipe insertion part to be inserted into the end of the corrugated pipe.

[0025] Furthermore, since the corrugated pipe insertion portion is inserted into the inside of the corrugated pipe from the end thereof, the corrugated pipe insertion portion can be inserted into the end of the corrugated pipe without increasing the diameter of the corrugated pipe insertion portion.

[0026] In another aspect of the present invention, the corrugated pipe insertion portion is configured to insert and fasten the end of the tubular body therein, and the fitting portion protrudes radially inward from the inner surface of the insertion portion main body and fits into the recess on the outer surface of the corrugated pipe.

[0027] According to this invention, by inserting the end of the corrugated pipe into the inside of the corrugated pipe insertion portion, the fitting portion protruding radially inward from the inner surface of the insertion portion main body fits into the recess on the outer surface of the corrugated pipe, thereby inserting the corrugated pipe insertion portion and the end of the corrugated pipe. Furthermore, since the end of the corrugated tube is inserted into the inside of the corrugated tube insertion portion, the end of the corrugated tube can be inserted into the corrugated tube insertion portion without increasing the diameter of the corrugated tube. Effect of the Invention

[0028] According to the present invention, it is possible to provide a tubular body connector that can easily connect a corrugated pipe to another tubular body with a simple structure. [Brief description of the drawings]

[0029] [Figure 1] FIG. 13 is an explanatory diagram of a connection structure in which a corrugated pipe and a hard tube are connected with a tubular body connector. [Diagram 2] 4 is a cross-sectional view of a connection structure in which a corrugated pipe and a hard tube are connected with a tubular body connector. FIG. [Diagram 3] 4 is an exploded perspective view of a connection structure that connects a corrugated pipe and a hard tube with a tubular body connector. FIG. [Figure 4] FIG. 13 is an explanatory diagram of a connection structure in which a corrugated pipe and a hard tube are connected by another tubular body connector. [Diagram 5] 13 is a cross-sectional view of a connection structure in which a corrugated pipe and a hard tube are connected by another tubular body connector. FIG. [Figure 6] 13 is an exploded perspective view of a connection structure for connecting a corrugated pipe and a rigid tube with another tubular body connector. FIG. [Figure 7] FIG. 13 is an explanatory cross-sectional view of a connection structure in which a corrugated pipe and a hard tube are connected by yet another tubular body connector. [Figure 8] 13 is an explanatory cross-sectional view of a connection structure in which a corrugated pipe and a rigid tube are connected by another tubular body connector. FIG. [Figure 9] FIG. 13 is an explanatory cross-sectional view of a connection structure in which corrugated pipes are connected to each other using another tubular body connector. [Figure 10] FIG. 4 is an explanatory exploded cross-sectional view of a separate tubular body connector. [Figure 11] 13 is a cross-sectional view of a connection structure in which a corrugated pipe and a hard tube are connected by a tubular body connector of another embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] An 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 pipe 2 and a hard tube 3 are connected with a tubular body connector 10a, FIG. 2 shows a cross-sectional view of the connection structure 1a, and FIG. 3 shows an exploded oblique view of the connection structure 1a.

[0031] FIG. 1(a) is a perspective view of the connection structure 1a, and FIG. 1(b) is a partially cutaway perspective view of the connection structure 1a on the near side. In addition, the longitudinal direction of the connection structure 1a in FIG.

[0032] 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 allows the electric wire 100 to be inserted throughout the entire structure. The tubular body connector 10, which is inserted into the corrugated pipe 2 and the rigid tube 3 to connect the corrugated pipe 2 and the rigid tube 3, has a corrugated insertion portion 20 which is inserted into the end of the corrugated pipe 2, and a tube insertion portion 30 which is inserted into the end of the rigid tube 3.

[0033] The electric wire 100 inserted into the connection structure 1 may be a single or multiple electric wires such as a covered electric wire, or multiple electric wires integrated together such as a pair of electric wires.Furthermore, it may be a wire harness in which multiple electric wires are bundled together.

[0034] The corrugated pipe 2 is a flexible cylindrical body in which convex portions 2a and concave portions 2b are arranged alternately in the longitudinal direction L. The hard tube 3 is a cylindrical body having smooth inner and outer circumferential surfaces and is less likely to bend than the flexible corrugated tube 2. Therefore, it is used, for example, in locations where it is desired to route the electric wire 100 passing through the inside in a substantially straight line.

[0035] The corrugated pipe 2 and the rigid tube 3 are formed with approximately the same inner and outer diameters. In detail, the outer circumferential surfaces of the protruding portions 2a of the corrugated pipe 2, in which the protruding portions 2a and the recessed portions 2b are alternately arranged in the longitudinal direction L, are formed with the same diameter as the outer circumferential surface of the rigid tube 3, and the inner circumferential surface of the recessed portions 2b are formed with the same diameter as the inner circumferential surface of the rigid tube 3.

[0036] As shown in Figures 1 to 3, the tubular body connector 10a (10) is disposed between the corrugated tube 2 and the rigid tube 3 arranged along the longitudinal direction L, and is inserted into each of the corrugated tube 2 and the rigid tube 3 to connect the corrugated tube 2 and the rigid tube 3.

[0037] The tubular body connector 10a, which is inserted into the corrugated pipe 2 and the rigid tube 3 to connect the corrugated pipe 2 and the rigid tube 3, has a corrugated inner insertion portion 20a (20) that is inserted into the end of the corrugated pipe 2, a tube outer insertion portion 30a (30) that is inserted into the end of the rigid tube 3, and a connecting portion 40a that is disposed between the corrugated inner insertion portion 20a and the tube outer insertion portion 30a and connects the corrugated inner insertion portion 20a and the tube outer insertion portion 30a.

[0038] The corrugated inner insertion part 20a has a structure that is inserted into the interior from the end of the corrugated pipe 2, and is provided with a cylindrical insertion part main body 21a and an insertion part 22a that protrudes radially outward from the insertion part main body 21a and fits into the recess of the corrugated pipe 2, i.e., the inner side of the protrusion 2a. 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 protruding direction, that is, a triangular cross-sectional shape.

[0039] In addition, the insertion portion 22a, which is formed with a tapered cross-sectional shape, is formed with a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when inserting the corrugated tube inner insertion portion 20a and the corrugated tube 2. Specifically, the fitting portion 22a formed to have a triangular cross section is formed to have a triangular cross section that is inclined from the tip of the insertion portion main body 21a toward the connecting portion 40a.

[0040] The tube outer insertion part 30a, which is inserted into the end of the hard tube 3, has a cylindrical insertion part main body 31a that fits externally onto the end of the hard tube 3, and an attachment groove 32 for attaching a water stop ring 33 is formed on the inner surface at the tip side of the insertion part main body 31a.

[0041] The connecting portion 40a, which is disposed between the corrugated inner insertion portion 20a and the tube outer insertion portion 30a and connects the corrugated inner insertion portion 20a and the tube outer insertion portion 30a, is formed so as to gradually decrease in diameter from the tube outer insertion portion 30a toward the corrugated inner insertion portion 20a in order to connect the corrugated inner insertion portion 20a to the tube outer insertion portion 30a, which has a larger diameter than the corrugated inner insertion portion 20a.

[0042] To connect the corrugated pipe 2 and the rigid tube 3 using the tubular body connector 10a configured in this manner, the tube outer insertion portion 30a, having a water stop ring 33 attached to the mounting groove 32, is inserted so as to fit externally onto the end of the rigid tube 3. Also, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from its end portion so that the fitting portion 22a fits into the inner side of the protrusion 2a which is recessed on the inner side of the corrugated pipe 2.

[0043] As described above, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10a to form a connection structure 1a by inserting the corrugated pipe inner insertion portion 20a into the inside from the end of the corrugated pipe 2 and inserting the tube outer insertion portion 30a so as to fit onto the end of the rigid tube 3.

[0044] Next, a connection structure 1b in which a corrugated pipe 2 and a hard tube 3 are connected by a tubular body connector 10b will be described with reference to Figs. FIG. 4 shows an explanatory diagram of a connection structure 1b in which a corrugated pipe 2 and a hard tube 3 are connected with a tubular body connector 10b, FIG. 5 shows a cross-sectional view of the connection structure 1b, and FIG. 6 shows an exploded oblique view of the connection structure 1b.

[0045] FIG. 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 portion of the front side of the connection structure 1b is cut away.

[0046] Unlike the tubular body connector 10a, in which a corrugated inner insertion portion 20a is inserted into the inside of the corrugated pipe 2 and a tube outer insertion portion 30a is inserted so as to fit around the end of the rigid tube 3, the tubular body connector 10b (10) is equipped with a corrugated outer insertion portion 20b (20) that is inserted so as to fit around the end of the corrugated pipe 2, and a tube outer insertion portion 30a (30) that fits around the end of the rigid tube 3.

[0047] Specifically, the tubular body connector 10b has a corrugated outer fitting portion 20b, a tube outer fitting portion 30a, and a connecting portion 40b that is disposed between the corrugated outer fitting portion 20b and the tube outer fitting portion 30a and connects the corrugated outer fitting portion 20b and the tube outer fitting portion 30a.

[0048] The corrugated outer insertion part 20b has a cylindrical insertion part main body 21b that is inserted so as to fit onto the end of the corrugated pipe 2, and an insertion part 22b that protrudes radially inward from the insertion part main body 21b and fits into a recess in the corrugated pipe 2, i.e., into the recess 2b on the outer surface side of the corrugated pipe 2. Although the fitting portion 22b protrudes in a radial direction different from the fitting portion 22a of the corrugated inner insertion portion 20a of the above-mentioned tubular body connector 10a, the cross-sectional shape is the same, so a description thereof will be omitted.

[0049] The connecting portion 40b, which is disposed between the corrugated outer attachment portion 20b and the tube outer attachment portion 30a and connects the corrugated outer attachment portion 20b and the tube outer attachment portion 30a, is formed so as to gradually decrease in diameter from the corrugated outer attachment portion 20b toward the tube outer attachment portion 30a in order to connect the corrugated outer attachment portion 20b, which has a slightly larger diameter than the tube outer attachment portion 30a, to the tube outer attachment portion 30a.

[0050] To connect the corrugated pipe 2 and the rigid tube 3 using the tubular body connector 10b configured in this manner, the tube outer insertion portion 30a, having a water stop ring 33 attached to the mounting groove 32, is inserted so as to fit externally onto the end of the rigid tube 3. Also, the corrugated outer fitting portion 20b is fitted onto the end portion of the corrugated pipe 2 so that the fitting portion 22b fits into the recess 2b that is recessed on the outer surface side of the corrugated pipe 2.

[0051] As described above, by inserting the corrugated outer fitting portion 20b onto the end of the corrugated pipe 2 so as to fit externally, and by inserting the tube outer fitting portion 30a onto the end of the rigid tube 3 so as to fit externally, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10b to form the connection structure 1b(1).

[0052] Next, connection structures 1c and 1d in which a corrugated pipe 2 and a hard tube 3 are connected with tubular body connectors 10c and 10d will be described with reference to FIG. Fig. 7 shows explanatory diagrams in the form of cross-sectional views of connection structures 1c and 1d in which a corrugated pipe 2 and a hard tube 3 are connected with further tubular body connectors 10c and 10d. In detail, Fig. 7(a) shows a cross-sectional view of connection structure 1c connected with tubular body connector 10c, and Fig. 7(b) shows a cross-sectional view of connection structure 1d connected with tubular body connector 10d.

[0053] The tubular body connector 10c(10) constituting the connection structure 1c(1) shown in Figure 7(a) is composed of the above-mentioned corrugated inner insertion portion 20a(20), a tube inner insertion portion 30c(30) that is inserted into the end of the hard tube 3, and a connecting portion 40c that connects the corrugated inner insertion portion 20a and the tube inner insertion portion 30c.

[0054] The inner tube insertion part 30c, which is inserted into the end of the hard tube 3, has a structure in which a cylindrical insertion part main body 31c is inserted into the inside of the hard tube 3 from the end thereof, and an attachment groove 32 for attaching a water stop ring 33 is formed on the outer surface of the tip side of the cylindrical insertion part main body 31c.

[0055] Since the insertion portion body 31c of the tube inner insertion portion 30c configured in this manner and the insertion portion body 21a of the corrugated gate inner insertion portion 20a have approximately the same diameter, the connecting portion 40c connecting the corrugated gate inner insertion portion 20a and the tube inner insertion portion 30c is formed in an approximately cylindrical shape.

[0056] To connect the corrugated pipe 2 and the rigid tube 3 using the tubular body connector 10c configured in this manner, the tube inner insertion portion 30c having a water stop ring 33 attached to the mounting groove 32 is inserted into the interior of the rigid tube 3 from its end. Also, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from its end portion so that the fitting portion 22a fits into the inner side of the protrusion 2a which is recessed on the inner side of the corrugated pipe 2.

[0057] As described above, by inserting the corrugated pipe 2 from its end into the interior thereof and inserting the tube inner insertion portion 30c into the rigid tube 3 from its end into the interior thereof, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10c to form a connection structure 1c.

[0058] The tubular body connector 10d (10) constituting the connection structure 1d (1) shown in Figure 7 (b) is composed of the above-mentioned corrugated outer insertion portion 20b (20), the above-mentioned tube inner insertion portion 30c (30), and a connecting portion 40d that connects the corrugated outer insertion portion 20b and the tube inner insertion portion 30c.

[0059] The insertion part body 21b of the corrugated outer insertion part 20b, which is inserted so as to fit over the end of the corrugated pipe 2, has a larger diameter than the insertion part body 31c of the tube inner insertion part 30c, which is inserted into the inside from the end of the hard tube 3, and in the tubular body connector 10d, the connecting part 40d connecting the corrugated outer insertion part 20b and the tube inner insertion part 30c is formed so as to gradually decrease in diameter from the corrugated outer insertion part 20b toward the tube inner insertion part 30c.

[0060] To connect the corrugated pipe 2 and the rigid tube 3 using the tubular body connector 10d configured in this manner, the tube inner insertion portion 30c having a water stop ring 33 attached to the mounting groove 32 is inserted into the interior of the rigid tube 3 from its end. Also, the corrugated outer fitting portion 20b is fitted onto the end portion of the corrugated pipe 2 so that the fitting portion 22b fits into the recess 2b that is recessed on the outer surface side of the corrugated pipe 2.

[0061] As described above, the corrugated outer insertion portion 20b is inserted so as to fit externally onto the end of the corrugated pipe 2, and the tube inner insertion portion 30c is inserted into the inside of the end of the hard tube 3, thereby connecting the corrugated pipe 2 and the hard tube 3 via the tubular body connector 10d to form a connection structure 1d.

[0062] Next, connection structures 1e to 1h in which a corrugated pipe 2 and a hard tube 3 are connected with tubular body connectors 10e to 10h will be described with reference to FIG. Fig. 8 shows explanatory diagrams in the form of cross-sectional views of connection structures 1e to 1h in which a corrugated pipe 2 and a hard tube 3 are connected with yet another tubular body connector 10e to 10h. In detail, Fig. 8(a) shows a cross-sectional view of a connection structure 1e connected with a tubular body connector 10e, Fig. 8(b) shows a cross-sectional view of a connection structure 1f connected with a tubular body connector 10f, Fig. 8(c) shows a cross-sectional view of a connection structure 1g connected with a tubular body connector 10g, and Fig. 8(d) shows a cross-sectional view of a connection structure 1h connected with a tubular body connector 10h.

[0063] As shown in FIG. 8(a), the tubular body connector 10e(10) has the above-mentioned corrugated inner insertion portion 20a(20), a tube outer insertion portion 30e(30) that is inserted into the end of the hard tube 3, and a connecting portion 40e that is disposed between the corrugated inner insertion portion 20a and the tube outer insertion portion 30e and connects the corrugated inner insertion portion 20a and the tube outer insertion portion 30e.

[0064] The tube outer insertion part 30e that is inserted into the end of the hard tube 3 has an installation groove 32 on the inner surface at the tip side, and unlike the tube insertion parts 30a, 30c that are fitted with a water stop ring 33, it has a cylindrical insertion part main body 31e that fits externally onto the end of the hard tube 3, and an adhesion piece 34 that protrudes radially inward from the inner surface of the insertion part main body 31e.

[0065] Similar to the fitting portion 22a of the corrugated inner insertion portion 20a, the contact piece 34 is formed continuously in the circumferential direction in the insertion portion main body 31e and has a tapered cross-sectional shape that tapers toward the tip in the protruding direction, i.e., a triangular cross-sectional shape.

[0066] In addition, the contact piece 34, which is formed with a tapered cross-sectional shape, is formed with a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when inserting the tube outer insertion portion 30e and the hard tube 3. Specifically, the contact piece 34 is formed with a triangular cross section that is inclined 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.

[0067] The connecting portion 40e, which is disposed between the corrugated inner insertion portion 20a and the tube outer insertion portion 30e and connects the corrugated inner insertion portion 20a and the tube outer insertion portion 30e, is formed so as to gradually reduce in diameter from the tube outer insertion portion 30e toward the corrugated inner insertion portion 20a in order to connect the corrugated inner insertion portion 20a to the tube outer insertion portion 30e, which has a larger diameter than the corrugated inner insertion portion 20a.

[0068] To connect the corrugated pipe 2 and the hard tube 3 using the tubular body connector 10e configured in this manner, the tube outer insertion portion 30e is inserted so as to fit over the end of the hard tube 3 while the adhesion piece 34 formed on the inner surface of the insertion portion main body 31e is brought into close contact with the smooth outer peripheral surface of the hard tube 3. Also, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from its end portion so that the fitting portion 22a fits into the inner side of the protrusion 2a which is recessed on the inner side of the corrugated pipe 2.

[0069] As described above, by inserting the corrugated inner insertion portion 20a into the inside of the corrugated pipe 2 from its end and inserting the tube outer insertion portion 30e so as to fit onto the end of the rigid tube 3, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10e to form a connection structure 1e(1).

[0070] As shown in FIG. 8(b), the tubular body connector 10f(10) has the above-mentioned corrugated outer fitting portion 20b(20), the above-mentioned tube outer fitting portion 30e(30), and a connecting portion 40f that is disposed between the corrugated outer fitting portion 20b and the tube outer fitting portion 30e and connects the corrugated outer fitting portion 20b and the tube outer fitting portion 30e.

[0071] The connecting portion 40f, which is disposed between the corrugated outer fitting portion 20b and the tube outer fitting portion 30e and connects the corrugated outer fitting portion 20b and the tube outer fitting portion 30e, is formed so as to gradually decrease in diameter from the tube outer fitting portion 30e toward the corrugated outer fitting portion 20b in order to connect the corrugated outer fitting portion 20b to the tube outer fitting portion 30e, which has a diameter slightly larger than that of the corrugated outer fitting portion 20b.

[0072] To connect the corrugated pipe 2 and the hard tube 3 using the tubular body connector 10f configured in this manner, the tube outer insertion portion 30e is inserted so as to fit over the end of the hard tube 3 while the adhesion piece 34 formed on the inner surface of the insertion portion main body 31e is brought into close contact with the smooth outer peripheral surface of the hard tube 3. Also, the corrugated outer fitting portion 20b is fitted onto the end portion of the corrugated pipe 2 so that the fitting portion 22b fits into the recess 2b that is recessed on the outer surface side of the corrugated pipe 2.

[0073] As described above, by inserting the corrugated outer fitting portion 20b onto the end of the corrugated pipe 2 so as to fit externally, and by inserting the tube outer fitting portion 30e onto the end of the rigid tube 3 so as to fit externally, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10f to form a connection structure 1f(1).

[0074] As shown in FIG. 8(c), the tubular body connector 10g(10) has the above-mentioned corrugated inner insertion portion 20a(20), a tube inner insertion portion 30g(30) that is inserted into the inside of the hard tube 3 from its end, and a connecting portion 40g that is disposed between the corrugated inner insertion portion 20a and the tube inner insertion portion 30g and connects the corrugated inner insertion portion 20a and the tube inner insertion portion 30g.

[0075] The tube inner insertion portion 30g, which is inserted into the inside of the hard tube 3 from its end, comprises a cylindrical insertion portion main body 31g which is inserted into the inside of the hard tube 3 from its end, and a contact piece 34g which protrudes radially inward from the inner surface of the insertion portion main body 31g.

[0076] Similar to the fitting portion 22a of the corrugated inner insertion portion 20a, the contact piece 34g is formed continuously in the circumferential direction in the insertion portion main body 31g and has a tapered cross-sectional shape that tapers toward the tip in the protruding direction, i.e., a triangular cross-sectional shape.

[0077] In addition, the contact piece 34g, which is formed with a tapered cross-sectional shape, is formed with a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when inserting the tube inner insertion portion 30g and the hard tube 3.

[0078] Specifically, the contact piece 34g formed in a triangular cross section is formed in a triangular cross section that is inclined from the tip of the insertion portion main body 31g toward the connecting portion 40. Therefore, the inclination directions of the contact piece 34g and the fitting portion 22a are opposite to each other in the longitudinal direction L.

[0079] The connecting portion 40g, which is disposed between the corrugated gate inner insertion portion 20a and the tube inner insertion portion 30g and connects the corrugated gate inner insertion portion 20a and the tube inner insertion portion 30g, is formed in an approximately cylindrical shape in order to connect the corrugated gate inner insertion portion 20a and the tube inner insertion portion 30g, which have the same diameter.

[0080] To connect the corrugated pipe 2 and the hard tube 3 using the tubular body connector 10g configured in this manner, the inner-tube insertion portion 30g is inserted into the inside of the hard tube 3 from its end while the adhesion piece 34g formed on the outer surface of the insertion portion main body 31g is brought into close contact with the smooth inner peripheral surface of the hard tube 3. Also, the corrugated inner insertion portion 20a is inserted into the corrugated pipe 2 from its end portion so that the fitting portion 22a fits into the inner side of the protrusion 2a which is recessed on the inner side of the corrugated pipe 2.

[0081] As described above, by inserting the corrugated pipe 2 from its end into the interior thereof and inserting the tube inner insertion portion 30g into the rigid tube 3 from its end into the interior thereof, the corrugated pipe 2 and the rigid tube 3 can be connected via the tubular body connector 10g to form a connection structure 1g(1).

[0082] As shown in FIG. 8(d), the tubular body connector 10h(10) has the above-mentioned corrugated outer insertion portion 20b(20), the above-mentioned tube inner insertion portion 30g(30), and a connecting portion 40h that is disposed between the corrugated outer insertion portion 20b and the tube inner insertion portion 30g and connects the corrugated outer insertion portion 20b and the tube inner insertion portion 30g.

[0083] The connecting portion 40h, which is disposed between the corrugated outer insertion portion 20b and the tube inner insertion portion 30g and connects the corrugated outer insertion portion 20b and the tube inner insertion portion 30g, is formed so as to gradually reduce in diameter from the corrugated outer insertion portion 20b toward the tube inner insertion portion 30g in order to connect the corrugated outer insertion portion 20b, which has a larger diameter than the tube inner insertion portion 30g, to the tube inner insertion portion 30g.

[0084] To connect the corrugated pipe 2 and the hard tube 3 using the tubular body connector 10h configured in this manner, the inner-tube insertion portion 30g is inserted into the inside of the hard tube 3 from its end while the adhesion piece 34g formed on the outer surface of the insertion portion main body 31g is brought into close contact with the smooth inner peripheral surface of the hard tube 3. Also, the corrugated outer fitting portion 20b is fitted onto the end portion of the corrugated pipe 2 so that the fitting portion 22b fits into the recess 2b that is recessed on the outer surface side of the corrugated pipe 2.

[0085] As described above, by inserting the corrugated outer insertion portion 20b so as to fit externally onto the end of the corrugated pipe 2, and inserting the tube inner insertion portion 30g so as to be inserted into the inside from the end of the hard tube 3, the corrugated pipe 2 and the hard tube 3 can be connected via the tubular body connector 10h to form a connection structure 1h(1).

[0086] Next, connection structures 1i to 1k in which a corrugated pipe 2 and a hard tube 3 are connected with tubular body connectors 10i to 10k will be described with reference to FIG. Fig. 9 shows explanatory diagrams in the form of cross-sectional views of connection structures 1i to 1k in which corrugated tubes 2 are connected to one another with different tubular body connectors 10i to 10k. In detail, Fig. 9(a) shows a cross-sectional view of a connection structure 1i connected with a tubular body connector 10i, Fig. 9(b) shows a cross-sectional view of a connection structure 1j connected with a tubular body connector 10j, and Fig. 9(c) shows a cross-sectional view of a connection structure 1k connected with a tubular body connector 10k.

[0087] The above-mentioned connection structures 1a to 1h are configured by connecting the corrugated pipe 2 and the hard tube 3 with tubular body connectors 10a to 10h, but the connection structures 1i to 1k described below are configured by connecting the corrugated pipes 2 to each other with different tubular body connectors 10i to 10k, as shown in Figure 9.

[0088] As shown in FIG. 9(a), the tubular body connector 10i(10) that connects corrugated pipes 2 has the above-mentioned corrugated pipe inner insertion portions 20a(20) arranged symmetrically in the longitudinal direction L and connected by connecting portions 40i. The connecting portions 40i, which are disposed between the corrugated gate inner insertion portions 20a and connect the corrugated gate inner insertion portions 20a to each other, are formed in a cylindrical shape.

[0089] To connect corrugated pipes 2 using the tubular body connector 10i configured in this manner, the corrugated inner insertion portion 20a is inserted into the interior from the end of the corrugated pipe 2 so that the fitting portion 22a fits into the inner surface of the convex portion 2a, which is concave on the inner surface of both corrugated pipes 2. As described above, by inserting the corrugated inner insertion portion 20a into the interior from the ends of both corrugated pipes 2, the corrugated pipes 2 can be connected to each other via the tubular body connector 10i to form the connection structure 1i(1).

[0090] As shown in FIG. 9(b), the tubular body connector 10j(10) that connects corrugated pipes 2 has the above-mentioned corrugated outer insertion portions 20b(20) arranged symmetrically in the longitudinal direction L and connected by connecting portions 40j. The connecting portion 40j, which is disposed between the corrugated outer fitting portions 20b and connects the corrugated outer fitting portions 20b, is formed in a cylindrical shape.

[0091] To connect corrugated pipes 2 using the tubular body connector 10j configured in this manner, the corrugated outer fitting portion 20b is inserted and fitted onto the end of the corrugated pipe 2 so that the insertion portion 22b fits into the concave recess 2b on the outer surface side of both corrugated pipes 2.

[0092] As described above, by inserting the corrugated outer fitting portion 20b so as to fit onto the ends of both corrugated pipes 2, the corrugated pipes 2 can be connected to each other via the tubular body connector 10j to form a connection structure 1j(1).

[0093] As shown in FIG. 9(c), the tubular body connector 10k(10) that connects corrugated pipes 2 has the above-mentioned corrugated inner insertion portion 20a(20) and corrugated outer insertion portion 20b(20) arranged symmetrically in the longitudinal direction L and connected by a connecting portion 40k.

[0094] The connecting portion 40k, which is disposed between the corrugated inner insertion portion 20a and the corrugated outer insertion portion 20b and connects the corrugated inner insertion portion 20a and the corrugated outer insertion portion 20b, is formed so as to gradually decrease in diameter from the corrugated outer insertion portion 20b toward the corrugated inner insertion portion 20a in order to connect the corrugated outer insertion portion 20b, which has a larger diameter than the corrugated inner insertion portion 20a, to the corrugated inner insertion portion 20a.

[0095] To connect corrugated pipes 2 using the tubular body connector 10k configured in this manner, the corrugated inner insertion portion 20a is inserted into the inside from the end of one of the corrugated pipes 2 so that the fitting portion 22a fits into the inner surface of the convex portion 2a, which is concave on the inner surface side of the corrugated pipe 2.

[0096] Also, the corrugated outer fitting portion 20b is fitted onto the end portion of the other corrugated pipe 2 so that the fitting portion 22b fits into the recess 2b that is recessed on the outer surface side of the corrugated pipe 2. As described above, the corrugated inner insertion portion 20a is inserted into the inside of one corrugated pipe 2 from its end, and the corrugated outer insertion portion 20b is inserted so as to fit onto the end of the other corrugated pipe 2, thereby connecting the corrugated pipes 2 to each other via the tubular body connector 10k to form a connection structure 1k(1).

[0097] As described above, the tubular body connector 10 (10a to 10k) that connects the corrugated tube 2 through which the electric wire 100 is inserted and the hard tube 3 (corrugated tube 2) to form the connection structure 1 (1a to 1k) is made up of a corrugated tube insertion part 20 that is inserted inside the end of the corrugated tube 2 or inserted outside the end of the corrugated tube 2, and a corrugated tube insertion part 20 that is inserted inside the end of the hard tube 3 (corrugated tube 2) or inserted outside the end of the hard tube 3 (corrugated tube 2). The tube insertion portion 30 (corrugated insertion portion 20) is provided, which is inserted onto the outside of the end of the tube 3 (corrugated pipe 2), and the corrugated pipe 2 has convex portions 2a and concave portions 2b arranged alternately in the longitudinal direction L. The corrugated insertion portion 20, which is inserted into the corrugated insertion portion 20, is provided with a cylindrical insertion portion main body 21 and an insertion portion 22 which protrudes radially from the insertion portion main body 21 and fits into the inner surface of the convex portion 2a or the concave portion 2b of the corrugated pipe 2.

[0098] Therefore, the corrugated pipe 2 and the hard tube 3 (corrugated pipe 2) can be easily connected with the tubular body connector 10 (10a to 10k) having a simple structure. More specifically, the corrugated pipe insertion part 20 of the tubular body connector 10 (10a to 10k) that connects the corrugated pipe 2 and the hard tube 3 (corrugated pipe 2) is provided with a cylindrical insertion part main body 21 and an insertion part 22 that protrudes radially from the insertion part main body 21 and fits into the inner surface side of the convex part 2a or the concave part 2b of the corrugated pipe 2. Therefore, when the corrugated pipe insertion part 20 is inserted into the end of the corrugated pipe 2, the insertion part 22 fits into the inner surface side of the convex part 2a or the concave part 2b of the corrugated pipe 2, and the tubular body connector 10 (10a to 10k) can be firmly connected to the corrugated pipe 2.

[0099] Then, by inserting the tube insertion portion 30 (corrugated insertion portion 20) into the end of the hard tube 3 (corrugated pipe 2), the corrugated pipe 2 and the hard tube 3 can be connected via the tubular body connector 10 (10a to 10k) to form the connection structure 1 (1a to 1k).

[0100] The fitting portions 22 (22a, 22b) are formed continuously in the circumferential direction in the insertion portion main body 21 (21a, 21b), and are formed with a tapered cross-sectional shape that tapers from the insertion portion main body 21 side toward the tip in the protruding direction. Therefore, the corrugated pipe 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 protrusion 2a of the corrugated pipe 2 or into the recess 2b.

[0101] In detail, since the fitting portion 22 is continuously formed in the circumferential direction on the insertion portion main body 21, there is a risk that when the fitting portion 22 is fitted into the inner surface side of the convex portion 2a or the concave portion 2b to insert the corrugated insertion portion 20 into the end portion of the corrugated pipe 2, there will be resistance to insertion, making it difficult to insert.

[0102] However, since the insertion portion 22 has a tapered cross-sectional shape, the tip side of the insertion portion 22 deforms when inserted into the end of the corrugated pipe 2, which reduces the insertion resistance when inserting it into the end of the corrugated pipe 2, and makes it possible to easily insert the corrugated insertion portion 20 into the end of the corrugated pipe 2.

[0103] Furthermore, since the fitting portion 22 is continuously formed in the circumferential direction in the insertion portion main body 21, when the connection structure 1 (1a to 1k) is inserted into the inner surface side of the convex portion 2a or the concave portion 2b of the corrugated pipe 2, water can be prevented from flowing between the corrugated pipe 2 and the corrugated pipe insertion portion 20.

[0104] In addition, the insertion portion 22, which is formed with a tapered cross-sectional shape, is formed with a tapered cross-sectional shape with a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when inserting the corrugated tube insertion portion 20 into the corrugated tube 2. This makes it easier to insert and attach, and also makes it less likely to come loose, allowing the connection to be stably maintained.

[0105] More specifically, the fitting portion 22 is tilted backward in the insertion direction when being inserted, which makes it easier to attach. When the fitting portion 22 is fitted into the inner surface side of the protrusion 2a or the recess 2b of the corrugated pipe 2, the inclination angle in the insertion direction of the tapered cross-sectional shape is different. Therefore, the fitting portion 22 is unlikely to deform in the removal direction, and the corrugated pipe insertion portion 20 in the inserted state can be prevented from accidentally coming out of the end of the corrugated pipe 2. Therefore, the connection state of the connection structure 1 (1a to 1k) can be stably maintained.

[0106] In addition, the hard tube 3 is composed of a smooth tube whose inner and outer surfaces are smooth, and the tube insertion part 30 inserted into the hard tube 3 has a cylindrical insertion part main body 31. Therefore, the tube insertion part 30 can be inserted into a hard tube 3 of a different type from the corrugated tube 2, and the corrugated tube 2 and the hard tube 3 can be connected via the tubular body connector 10 to form the connection structure 1.

[0107] Furthermore, in the above-mentioned connection structure 1 (1a, 1b, 1c, 1d), a ring-shaped water-stopping ring 33 is provided, which is arranged between the insertion portion main body 31 in the tube insertion portion 30 and the smooth surface of the hard tube 3 and adheres closely to both to seal against water. Therefore, since a ring-shaped water-stopping ring 33 is arranged between the insertion portion main body 31 in the tube insertion portion 30 and the smooth surface of the hard tube 3, it is possible to seal against water between the hard tube 3 and the tube insertion portion 30 in the inserted state.

[0108] Furthermore, 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, so that the insertion state between the tube insertion portion 30 and the hard tube 3 can be stably maintained by at least the frictional resistance between the smooth surface and the water stop ring 33.

[0109] Furthermore, in the above-mentioned connection structure 1 (1e, 1f, 1g, 1h), the tube insertion portion 30 is provided with a contact piece 34 that protrudes radially from the insertion portion main body 31 and adheres closely to the smooth surface of the hard tube 3, and since the contact piece 34 provided on the insertion portion main body 31 of the tube insertion portion 30 adheres closely to the smooth surface of the hard tube 3, it is possible to seal against water between the hard tube 3 and the tube insertion portion 30 in the inserted state. Moreover, in the above-described connection structure 1 (1i, 1j, 1k), the corrugated pipes 2 can be easily and reliably connected to each other by the tubular body connectors 10 (10i, 10j, 10k).

[0110] In addition, in the above-mentioned connection structure 1 (1a, 1c, 1e, 1g, 1i, 1j, 1k), the corrugated insertion portion 20 is configured to be inserted into the inside of the end of the corrugated pipe 2, and the fitting portion 22 protrudes radially outward from the outer circumferential surface of the insertion portion main body 21 and penetrates into the inner surface of the convex portion 2a of the corrugated pipe 2.

[0111] Therefore, by inserting the corrugated insertion part 20 into the inside from the end of the corrugated pipe 2, the fitting part 22 protruding radially outward from the outer circumferential surface of the insertion part main body 21 penetrates into the inner surface of the convex part 2a of the corrugated pipe 2, thereby allowing the corrugated insertion part 20 to be inserted into the end of the corrugated pipe 2.

[0112] In addition, since the corrugated tube insertion portion 20 is inserted into the inside of the corrugated tube 2 from its end, the corrugated tube insertion portion 20 can be inserted into the end of the corrugated tube 2 without the corrugated tube insertion portion 20 becoming thicker in diameter.

[0113] In addition, in the above-mentioned connection structure 1 (1b, 1d, 1f, 1h, 1k), the corrugated outer insertion portion 20b is configured to be inserted and attached by inserting the end of the corrugated pipe 2 therein, and the insertion portion 22 protrudes radially inward from the inner surface of the insertion portion main body 21 and fits into the recess 2b of the corrugated pipe 2.

[0114] Therefore, by inserting the end of the corrugated pipe 2 into the inside of the corrugated outer insertion part 20b, the insertion part 22b protruding radially inward from the inner surface of the insertion part main body 21b enters the recess 2b of the corrugated pipe 2, thereby inserting the corrugated outer insertion part 20b and the end of the corrugated pipe 2. In addition, since the end of the corrugated tube 2 is inserted inside the corrugated outer fitting portion 20b, the end of the corrugated tube 2 can be inserted into the corrugated outer fitting portion 20b without increasing the diameter of the corrugated tube 2.

[0115] In the configuration of this invention and the correspondence with the above-mentioned embodiment, The first tubular body of the present invention corresponds to the corrugated pipe 2, Similarly, The second tubular body corresponds to a corrugated pipe 2 or a 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, Corrugated pipe corresponds to corrugated pipe 2, The corrugated pipe insertion part corresponds to the corrugated pipe insertion part 20, The insertion part body corresponds to the insertion part body 21 or the insertion part body 31, The recess corresponds to the inner surface side of the protrusion 2a or the recess 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 is compatible with water stop ring 33. The contact portion corresponds to the contact piece 34, The recessed portion of the inner peripheral surface corresponds to the inner surface side of the protruding portion 2a, The recess on the outer circumferential surface corresponds to the recess 2b. The present invention is not limited to the above-described embodiment, but may be embodied in many different ways.

[0116] In the above description, the corrugated inner insertion portion 20a in the tubular body connectors 10 to 10j is formed integrally with the insertion portion main body 21 and the fitting portion 22, but the fitting portion 22 may be configured to be detachable from the insertion portion main body 21 as shown in Fig. 10. Separate type tubular body connectors 10Xa to 10Xd in which the fitting portion 22 is configured to be detachable from the insertion portion main body 21 will be described below.

[0117] Fig. 10 shows explanatory exploded cross-sectional views of separate-type tubular body connectors 10Xa to 10Xd. In detail, Fig. 10(a) shows a cross-sectional view of separate-type tubular body connector 10Xa, Fig. 10(b) shows a cross-sectional view of separate-type tubular body connector 10Xb, Fig. 10(c) shows a cross-sectional view of separate-type tubular body connector 10Xc, and Fig. 10(d) shows a cross-sectional view of separate-type tubular body connector 10Xd.

[0118] As shown in Figure 10(a), the separate type tubular body connector 10Xa is a separate type of tubular body connector 10 consisting of a corrugated inner insertion portion 20a and a tube outer insertion portion 30a, and is configured so that the insertion portion 22a is fitted into the outer surface of the insertion portion main body 21a of the corrugated inner insertion portion 20a. Specifically, a fitting groove 211a into which the fitting portion 22a fits is provided on the outer surface of the insert portion body 21a of the corrugated inner insert portion 20a.

[0119] The fitting portion 22a that fits into the insertion portion main body 21 has a cylindrical fitting tube portion 221a, and the fitting portion 22a is provided on the outer surface of the fitting tube portion 221a. The separate type tubular body connector 10Xa thus constructed is constructed by fitting the fitting tube portion 221a into the fitting groove 211a provided on the outer surface of the insertion portion main body 21a, and assembling the fitting portion 22a to the insertion portion main body 21a.

[0120] As shown in Figure 10(b), the separate type tubular body connector 10Xb is a separate type of tubular body connector 10b consisting of a corrugated outer insertion portion 20b and a tube outer insertion portion 30a, and is configured so that the insertion portion 22b is fitted into the inner surface of the insertion portion main body 21b of the corrugated outer insertion portion 20b. Specifically, a fitting groove 211b into which the fitting portion 22b is fitted is provided on the inner surface of the fitting portion main body 21b of the corrugated outer fitting portion 20b.

[0121] The fitting portion 22b that fits into the insertion portion main body 21b has a cylindrical fitting tube portion 221b, and is provided with the fitting portion 22b on the outer surface of the fitting tube portion 221b. The separate-type tubular body connector 10Xb thus constructed is constructed by fitting the fitting tube portion 221b into the fitting groove 211b provided on the inner surface of the insertion portion main body 21b, and assembling the fitting portion 22b to the insertion portion main body 21b.

[0122] As shown in Figure 10(c), the separate type tubular body connector 10Xc is a separate type of tubular body connector 10c consisting of a corrugated inner insertion portion 20a and a tube outer insertion portion 30a, and is configured so that the insertion portion 22 is fitted into the outer surface of the insertion portion main body 21 of the corrugated inner insertion portion 20a. Specifically, a fitting groove 211a into which the fitting portion 22a fits is provided on the outer surface of the insert portion body 21a of the corrugated inner insert portion 20a.

[0123] The fitting portion 22a that fits into the insertion portion main body 21a has a cylindrical fitting tube portion 221a, and the fitting portion 22a is provided on the outer surface of the fitting tube portion 221a. The separate-type tubular body connector 10Xc thus constructed is constructed by fitting the fitting tube portion 221a into the fitting groove 211a provided on the outer surface of the insertion portion main body 21a, and assembling the fitting portion 22a to the insertion portion main body 21.

[0124] As shown in Figure 10(d), the separate type tubular body connector 10Xd is a separate type of tubular body connector 10d consisting of a corrugated outer insertion portion 20b and a tube inner insertion portion 30c, and is configured so that the insertion portion 22b is fitted into the inner surface of the insertion portion main body 21b of the corrugated outer insertion portion 20b. Specifically, a fitting groove 211b into which the fitting portion 22b is fitted is provided on the inner surface of the fitting portion main body 21b of the corrugated outer fitting portion 20b.

[0125] The fitting portion 22b that fits into the insertion portion main body 21b has a cylindrical fitting tube portion 221b, and is provided with the fitting portion 22b on the outer surface of the fitting tube portion 221b. The separate-type tubular body connector 10Xd thus constructed is constructed by fitting the fitting tube portion 221b into the fitting groove 211b provided on the inner surface of the insertion portion main body 21b, and assembling the fitting portion 22b to the insertion portion main body 21b.

[0126] As described above, the separate type tubular body connectors 10Xa-10Xd are configured by assembling the insertion portion main body 21 and the insertion portion 22 together, and the insertion portion main body 21 and the insertion portion 22 are configured separately.The insertion portion 22 that fits into the recess of the corrugated pipe 2 is configured from a material with high deformability different from the insertion portion main body 21, and the insertion portion 22 is configured from materials with suitable properties, respectively, to form a tubular body connector 10 that satisfies usability and required performance.

[0127] In the above description, the separate type tubular body connectors 10Xa to 10Xd, which are separate types of the tubular body connectors 10a to 10d, have been described. However, the above-described tubular body connectors 10e to 10j may also be configured as separate bodies in the same manner as the above-described separate structure.

[0128] In the above description, the tubular body connector 10 is used to connect the corrugated pipe 2 and the hard tube 3 or to connect the corrugated pipes 2 to each other to form a connection structure 1 through which the electric wire 100 can be inserted. However, as shown in FIG. 11, the connector may be configured to be inserted through a branch portion where a branch wire branches off from a trunk wire in the electric wire 100. FIG. 11 shows a cross-sectional view of a connection structure 1Yj in which a corrugated pipe 2 and a hard tube 3 are connected by a tubular body connector 10Yj of another embodiment.

[0129] In order to insert the branched portion of the electric wire 100, for example, a tubular body connector 10Yj is configured by providing a branch wire insertion portion 41 for inserting the branch wire into the coupling portion 40j in the above-mentioned tubular body connector 10j. A connection structure 1Yj in which a corrugated tube 2 is inserted into each of the corrugated inner insertion portions 20a of the tubular body connector 10Yj can be configured by inserting a trunk wire into the corrugated tube 2 across the tubular body connector 10Yj and drawing out the branch wire from the branch wire insertion portion 41. When the branch wire drawn out from the branch wire insertion portion 41 is inserted into the corrugated pipe 2 or the hard tube 3 , the branch wire insertion portion 41 may be constituted by the corrugated pipe insertion portion 20 or the tube insertion portion 30 .

[0130] In the above description, the corrugated pipe 2 and the rigid tube 3, or the corrugated pipes 2 themselves, connected via the tubular body connector 10 have approximately the same diameter, but they may have different diameters. In this case, the corrugated pipe inner insertion portion 20a and the tube insertion portion 30 are formed with diameters that fit the corrugated pipe 2 and the rigid tube 3, respectively, and the corrugated pipe inner insertion portion 20a and the tube insertion portion 30, which are formed according to their respective diameters, are connected by the connecting portion 40.

[0131] Furthermore, although the fitting portion 22 is continuous around the entire circumference of the insertion portion body 21, it may be divided at a predetermined interval in the circumferential direction. In this case, the watertightness of the fitting portion 22 or the fitting portion 22a is reduced, but the watertightness can be ensured by using the fitting portion 22 or the fitting portion 22a in combination with the watertight ring 33.

[0132] In addition, the insertion portion 22 is formed with a tapered cross-sectional shape having a different inclination angle in the insertion direction so that it can be tilted backward in the insertion direction when inserting the corrugated tube insertion portion 20 into the corrugated tube 2, but the cross-sectional shape may also be an isosceles triangle. [Explanation of symbols]

[0133] 2...Corrugated pipe 2a…Convex part 2b…Concave 3…Hard tube 10... Tubular body connector 20…Corrugated insert part 21...insertion part main body 22...Insertion part 30…Tube insertion part 31…insertion part body 32...Water stop ring 34…Adhesive piece 100...Electric wire

Claims

1. A tubular body connector that connects a first tubular body and a second tubular body through which an electric wire is inserted, a first insertion part that is inserted into the inside of the end of the first tubular body or inserted outside the end of the first tubular body; A second insertion part is provided which is inserted into the inside of the end of the second tubular body or 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 pipe having projections and recesses arranged alternately in a longitudinal direction, The corrugated tube insertion portion of the first insertion portion and the second insertion portion, which is inserted into the tubular body formed of the corrugated tube, A cylindrical insertion portion main body, a fitting portion that protrudes radially from the insertion portion body and fits into a recess of the corrugated pipe, The insertion portion is The insertion portion body is formed continuously in a circumferential direction, The insertion portion is formed with a tapered cross-sectional shape that tapers from the insertion portion body side toward the tip in the protruding direction, The insertion portion formed with a tapered cross-sectional shape is The corrugated pipe insertion portion is formed with a tapered cross-sectional shape having a different inclination angle in the insertion direction so that the corrugated pipe insertion portion can be tilted backward in the insertion direction when the corrugated pipe insertion portion and the tubular body are inserted. Tubular body connector.

2. The first tubular body is constituted by the corrugated pipe, the second tubular body is a smooth tube having at least one of an inner surface and an outer surface being a smooth surface, the first insertion portion that is inserted into the first tubular body formed of the corrugated pipe is the corrugated pipe insertion portion, The second insertion portion that is inserted into the second tubular body made of a smooth tube is a smooth tube insertion portion having a cylindrical insertion portion main body. The tubular body connector according to claim 1 .

3. A water-stopping ring is provided between the insertion part body of the smooth tube insertion part and the smooth surface of the second tubular body, and is in close contact with both of them to stop water. The tubular body connector according to claim 2 .

4. The smooth tube insertion portion is A contact portion is provided which protrudes radially from the insertion portion main body and contacts the smooth surface of the second tubular body. A tubular body connector according to claim 2 or claim 3.

5. Both the first tubular body and the second tubular body are formed of the corrugated pipe, Both the first and second insertion parts are the corrugated pipe insertion parts. The tubular body connector according to claim 1 .

6. The corrugated tube insertion portion is configured to be inserted into the end portion of the tubular body, The fitting portion protrudes radially outward from the outer circumferential surface of the insertion portion body and fits into the recess in the inner circumferential surface of the corrugated pipe. A tubular body connector according to any one of claims 1 to 5.

7. The corrugated tube insertion portion is configured to insert and attach an end portion of the tubular body therein, The fitting portion protrudes radially inward from the inner peripheral surface of the insertion portion body and fits into the recess in the outer peripheral surface of the corrugated pipe. A tubular body connector according to any one of claims 1 to 5.

Images