JP2005033931A - Corrugate tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugate tube whose diametrical dimensions can be adjusted according to a wire harness and which can keep its slit closed. <P>SOLUTION: For the corrugate tube 10, a press piece 21 is made at the internal perimeter 14A of an outer end 14, whereby a storage 16 is made of the press piece 21 and the outer end 14. An engaging means 17 is composed of a multistage catch 18 roughly saw-toothed in cross section which is provided at the internal perimeter 14A of the outer end 14 within this storage 16, and a detent which can lock itself to the multistage catch 18, being provided at the periphery 15A of an inner end 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a corrugated tube that covers a wire harness used for wiring an automobile or the like.

  A flexible corrugated tube is known to protect the wire harness (for example, Patent Document 1).

  The corrugated tube of Patent Document 1 has a cylindrical portion in which a large-diameter cylindrical portion and a small-diameter cylindrical portion are alternately arranged along the same axis, and a slit is formed along the longitudinal direction of the cylindrical portion to form a pair of edge portions. And projecting outwardly from each large-diameter cylindrical portion on one edge, and through-holes are formed in each large-diameter cylindrical portion on the other concave edge.

According to the corrugated tube, the protrusion is inserted into the through hole, and the tip of the protrusion protruding from the through hole is crushed by heat, so that the protrusion is locked to the through hole in a state where the pair of edges overlap each other. Close.
Thus, the wire harness accommodated in the corrugated tube can be protected by the corrugated tube by overlapping the pair of edge portions and closing the slit.

The corrugated tube is a long body in which large-diameter cylindrical portions and small-diameter cylindrical portions are alternately arranged along the same axis, and is a cylindrical body having continuity, and further cut at an arbitrary portion. Is possible.
Therefore, it can cut | disconnect and use it for free length according to the length of a wire harness.
JP 2000-261931 A (first page, FIG. 1)

By the way, in order to make it correspond to various uses, there exist several types of wire harnesses from which a diameter dimension differs. However, the corrugated tube of Patent Document 1 has a structure in which the slit can be fixed in a closed state, but does not have a function of adjusting the diameter.
Therefore, in order to cope with various types of wire harnesses having different diameter dimensions, it is necessary to prepare a plurality of types of corrugated tubes having different diameter diameter dimensions, which hinders cost reduction.

  The present invention has been made to satisfy the above-described demand, and an object of the present invention is to provide a corrugated tube capable of adjusting a diameter dimension corresponding to a wire harness and maintaining a slit in a closed state.

  In order to achieve the object described above, the present invention is provided with slits along a substantially cylindrical main body, and both ends in the circumferential direction of the main body become an outer end and an inner end, respectively. An overlap type corrugated tube that is laminated in such a manner that it is provided on one of the outer end and the inner end and accommodates the other of the outer end and the inner end. A multi-stage engaging means provided between the other of the outer end portion and the inner end portion and the inner surface of the housing portion is provided.

  In the corrugated tube configured as described above, a storage portion for storing the other end portion is provided at one end portion of the outer end portion and the inner end portion, and a multistage type is provided between the inner surface of the storage portion. Engagement means were provided. Therefore, it is possible to select any part of the multistage engaging means and engage the other end.

  In the present invention, the holding portion is provided by a pressing piece formed on the inner peripheral surface of the outer end portion, and the inner peripheral surface of the outer end portion and the outer periphery of the inner end portion in the receiving portion. A multi-stage locking portion having a substantially saw-toothed cross section provided on one of the surfaces, and the other of the inner peripheral surface of the outer end and the outer peripheral surface of the inner end in the storage portion. The engaging means is provided by a locking claw that can be locked to the multistage locking portion.

The engaging means for engaging the outer end portion and the inner end portion is constituted by a saw blade-like multi-stage engaging portion formed in the housing portion and an engaging claw engaging with the multi-stage engaging portion. It can be engaged by engaging the locking claw with the stopper.
Therefore, it can be easily locked in a state where the outer end portion and the inner end portion of the corrugated tube are overlapped, and can be easily removed from a state where the outer end portion and the inner end portion are overlapped.

  Furthermore, the present invention is characterized in that a thin hinge is provided along the bus of the main body.

By providing a thin hinge along the generatrix of the main body, the corrugated tube can be kept largely open by the thin hinge, so that extrusion molding becomes possible and the corrugated tube can be produced continuously.
In addition, by forming the corrugated tube by extrusion, the tip of the multistage locking portion and the locking claw can be formed while maintaining an acute angle.

As described above, according to the present invention, a storage portion for storing the other end portion is provided at one end portion of the outer end portion and the inner end portion, and a multistage type is provided between the inner end portion of the storage portion. The engagement means was provided. Therefore, it is possible to select any part of the multistage engaging means and engage the other end.
Thereby, the diameter dimension of a corrugated tube can be adjusted large according to the outer diameter of a wire harness, can be adjusted small, and a slit can be maintained in the closed state.

  Further, according to the present invention, the engaging means for engaging the outer end portion and the inner end portion is a saw blade-shaped multi-stage engaging portion formed in the housing portion, and the latch that is engaged with the multi-stage engaging portion. It is comprised with a nail | claw and can be engaged by meshing | engaging a latching claw with a multistage latching | locking part.

Therefore, it can be easily locked in a state where the outer end portion and the inner end portion of the corrugated tube are overlapped, and can be easily removed from a state where the outer end portion and the inner end portion are overlapped.
Thereby, the attachment work of a corrugated tube can be easily performed without taking time.

Further, according to the present invention, by providing the thin hinge along the generatrix of the main body, the corrugated tube can be kept largely open by the thin hinge, so that extrusion molding is possible. Thereby, since a corrugated tube can be produced continuously, productivity can be improved.
In addition, by extrusion molding the corrugated tube, it is possible to maintain the tip of the multistage locking part and the locking claw with an acute angle, and it is possible to securely lock the locking claw to the multistage locking part. Become.

Hereinafter, embodiments according to the present invention will be described in detail based on the drawings.
The corrugated tube 10 according to the first embodiment of the present invention shown in FIG. 1 is a long harness, is continuous, and can be freely cut at an arbitrary position so that the wire harness is routed to an automobile as an example. It is a protection member for wire harnesses which accommodates and protects inside.

  The corrugated tube 10 is provided with slits 12 along a long main body 11 formed in a substantially cylindrical shape, and both end portions in the circumferential direction of the main body 11 become an outer end portion 14 and an inner end portion 15, respectively. Are stacked (overlapped) as described above, and are provided on the outer end portion 14 to accommodate the inner end portion 15, and the multistage type provided between the inner end portion 15 and the inner surface of the accommodating portion 16. Engaging means 17.

Further, in the corrugated tube 10, the holding piece 16 is formed by the holding piece 21 and the outer end portion 14 by forming the holding piece 21 on the inner peripheral surface 14 </ b> A of the outer end portion 14. A multistage locking portion 18 having a substantially saw-toothed cross section provided on the inner peripheral surface 14A of the end portion 14 and a latch provided on the outer peripheral surface 15A of the inner end portion 15 and capable of locking to the multistage locking portion 18. The engaging means 17 is provided by the pawl 19.
In addition, the corrugated tube 10 is provided with a thin hinge 23 along a bus line of the main body 11 (that is, a line along the longitudinal direction on the outer periphery of the main body).

According to the corrugated tube 10, the inner end 15 is pushed into the accommodating portion 16 as indicated by an arrow, so that the multi-stage locking portion 18 of the accommodating portion 16 is connected to the inner end 15 as shown in FIG. 2. The locking claw 19 is locked so as to be engaged.
Here, since the multistage locking portion 18 and the locking claw 19 are formed in plural, even if a part of the locking claw 19 is locked to the multistage locking portion 18, The end 15 can be locked in an overlapped state.
Therefore, any part of the multistage locking part 18 can be selected and the locking claw 19 can be engaged. Therefore, the diameter dimension of the corrugated tube 10 can be adjusted to be large according to the outer diameter of the wire harness 25 or can be adjusted to be small.

Furthermore, since the latching claw 19 can be latched to the multistage latching portion 18 and the inner end 15 can be overlapped with the outer end 14, the slit 12 of the corrugated tube 10 (see FIG. 1). Can be kept closed.
Therefore, the wire harness 25 housed inside the corrugated tube 10 can be protected by the corrugated tube 10.

In addition, the multistage locking portion 18 formed in the accommodating portion 16 has a saw blade shape, and the locking claw 19 to be locked to the multistage locking portion 18 also has a saw blade shape so that the multistage locking portion 18 has a locking claw. The engagement claw 19 is easily engaged with the multistage engagement portion 18 simply by meshing the engagement 19.
Thus, the outer end 14 and the inner end 15 of the corrugated tube 10 can be easily engaged with each other.

Further, as shown in FIG. 3, by pressing the inner end 15 as indicated by an arrow from the outside, the inner end 15 is elastically deformed in the inner peripheral direction, and the pressing piece 21 is elastically deformed in the inner peripheral direction. Thus, the multistage locking portion 18 is separated from the locking claw 19 to release the engagement between the multistage locking portion 18 and the locking claw 19.
Thereby, it can remove easily from the state which the outer side edge part 14 and the inner side edge part 15 overlapped.

  Actually, since the corrugated tube 10 is a continuous long object, the engagement between the multistage locking portion 18 and the locking claw 19 is released even if the inner end 15 is pressed from one side as shown by an arrow. However, by pressing a plurality of inner end portions 15 along the slit 12 of the corrugated tube 10, the engagement between the multistage locking portion 18 and the locking claw 19 of the long corrugated tube 10 can be easily released. it can.

In addition, by providing the thin hinge 23 along the generatrix of the main body 11, the thin hinge 23 can be elastically deformed and the corrugated tube 10 can be kept largely open as shown in FIG.
In this way, the corrugated tube 10 can be continuously extruded from the extrusion port 31 of the die (extrusion mold) 30 by maintaining the main body 11 in a largely open state.

Since the corrugated tube 10 can be continuously produced, the productivity of the corrugated tube 10 can be increased.
Further, by extruding the corrugated tube 10, it is possible to form the multi-stage locking portion 18 and the locking claw 19 while maintaining the sharp-edged edge of the multi-stage locking portion 18 and the locking claw 19. The locking property can be further increased.

  On the other hand, when the corrugated tube 10 is molded by normal injection molding, multistage locking is performed in consideration of the case where the upper mold and the lower mold are opened or the corrugated tube 10 is released from the mold. It is necessary to round the saw blade tip of the portion 18 and the locking claw 19, which may impair the engagement of the multistage locking portion 18 and the locking claw 19.

  Next, 2nd-6th embodiment is described based on FIGS. In addition, in 2nd-6th embodiment, the same code | symbol is attached | subjected about the same member as 1st Embodiment, and description is abbreviate | omitted.

(Second Embodiment)
The corrugated tube 50 according to the second embodiment shown in FIG. 5 includes a multi-stage locking portion 52 having a substantially saw-toothed cross section provided on the outer peripheral surface 21A of the holding piece 21 in the housing portion 16, and the inner periphery of the inner end portion 15. The engaging means 51 is provided by a locking claw 53 that is provided on the surface 15B and can be locked to the multistage locking portion 52, and other configurations are the same as those of the corrugated tube 10 of the first embodiment. is there.
According to the corrugated tube 50 of 2nd Embodiment, the effect similar to the corrugated tube 10 of 1st Embodiment can be acquired.

(Third embodiment)
A corrugated tube 60 according to the third embodiment shown in FIG. 6 is provided between the inner end portion 15 and the inner surface of the accommodating portion 61 provided in the inner end portion 15 and accommodates the outer end portion 14. And multi-stage engaging means 62.
The corrugated tube 60 is provided with an accommodating portion 61 by a pressing piece 63 formed on the outer peripheral surface 15A of the inner end portion 15 and a cross section provided on the outer peripheral surface 15A of the inner end portion 15 in the accommodating portion 61. Engaging means 62 is provided by a substantially saw-toothed multistage locking portion 64 and a locking claw 65 provided on the inner peripheral surface 14A of the outer end portion 14 and capable of locking to the multistage locking portion 64. ing.

Other configurations of the corrugated tube 60 of the third embodiment are the same as those of the corrugated tube 10 of the first embodiment.
According to the corrugated tube 60 of the third embodiment, the same effect as the corrugated tube 10 of the first embodiment can be obtained.

(Fourth embodiment)
The corrugated tube 70 according to the fourth embodiment shown in FIG. 7 includes a multistage locking portion 72 having a substantially saw-toothed cross section provided on the inner peripheral surface 63A of the holding piece 63 in the housing portion 61 and the outer periphery of the outer end portion 14. The engaging means 71 is provided by a locking claw 73 provided on the surface 14B and capable of being locked to the multistage locking portion 72, and the other configuration is the same as that of the corrugated tube 60 of the third embodiment. is there.
According to the corrugated tube 70 of the fourth embodiment, the same effect as the corrugated tube 60 of the third embodiment can be obtained.

(Fifth embodiment)
The corrugated tube 80 of the fifth embodiment shown in FIGS. 8A and 8B is curved toward the holding piece 21 on the inner peripheral surface 15B of the inner end portion 15 constituting the corrugated tube 50 of the second embodiment. And a height H of the raised portion 81 is made the same as the thickness T of the pressing piece 21.

Therefore, as shown in (B), the maximum length L of the locking claw 53 is locked to the multistage locking portion 52, and the end portion 81A of the raised portion 81 is abutted against the end portion 21A of the pressing piece 21. Thus, the step between the pressing piece 21 and the inner end 15 can be eliminated.
Thereby, it can avoid having a bad influence on the coating | cover of the wire harness 25 accommodated in the corrugated tube 50. FIG.
In addition, according to the corrugated tube 80 of the fifth embodiment, the same effect as the corrugated tube 10 of the first embodiment can be obtained.

(Sixth embodiment)
In the corrugated tube 90 of the sixth embodiment shown in FIGS. 9A and 9B, the end of the holding piece 21 constituting the corrugated tube 50 of the second embodiment extends along the inner peripheral surface 15 </ b> B of the inner end 15. And an extending portion 91 extending in a tapered shape.
According to the corrugated tube 90 of the sixth embodiment, as shown in FIG. 9A, even in a state where the locking claw 53 is locked halfway to the multistage locking portion 52, the pressing piece and the inner end portion Can be eliminated.
Thereby, it can avoid having a bad influence on the coating | cover of the wire harness 25 accommodated in the corrugated tube 50. FIG.

Furthermore, as shown in FIG. 9B, even when the maximum length of the locking claw 53 is locked to the multistage locking portion 52, of course, the step between the pressing piece 21 and the inner end portion 15 is eliminated. Thus, the covering of the wire harness 25 can be prevented from being adversely affected.
Therefore, according to the corrugated tube 90, the covering of the wire harness 25 housed in the corrugated tube 90 can be protected without being influenced by the meshing amount of the multistage locking portion 52 and the locking claw 53.

Further, according to the corrugated tube 90 of the sixth embodiment, since the end portion of the holding piece 21 is provided with the extending portion 91 extending toward the inner peripheral surface 15B of the inner end portion 15, the inner end portion 15. Can be easily inserted into the housing portion 16 by the extension portion 91 guiding the inner end portion 15.
In addition, according to the corrugated tube 90 of the sixth embodiment, the same effect as the corrugated tube 10 of the first embodiment can be obtained.

  The corrugated tube of the present invention is not limited to the above-described embodiments. For example, the main body, the outer end portion, the inner end portion, the accommodating portion, the engaging means, the multistage locking portion, and the engagement illustrated in each embodiment. The material, shape, dimensions, form, number, arrangement, and the like of the pawl and thin-walled hinge are arbitrary and are not limited as long as the present invention can be achieved.

  Moreover, the corrugated tube of this invention is not limited to the corrugated tube which coat | covers the wire harness used, for example in a motor vehicle, for example, It is used also for the corrugated tube for wire harnesses used with other apparatuses.

It is a front view which shows the state which opened the upper side edge part and inner side edge part of the corrugated tube (1st Embodiment) which concerns on this invention. It is a front view which shows the state which overlapped and closed the upper side edge part and lower side edge part of 1st Embodiment which concern on this invention. It is explanatory drawing which shows the example which cancels | releases the engagement state of the upper side edge part and lower side edge part of 1st Embodiment which concerns on this invention. It is a figure explaining the manufacturing method of a 1st embodiment concerning the present invention. It is a front view which shows the corrugated tube (2nd Embodiment) which concerns on this invention. It is a front view which shows the corrugated tube (3rd Embodiment) which concerns on this invention. It is a front view which shows the corrugated tube (4th Embodiment) which concerns on this invention. (A), (B) is an enlarged view which shows the principal part of the corrugated tube (5th Embodiment) which concerns on this invention. (A), (B) is an enlarged view which shows the principal part of the corrugated tube (6th Embodiment) which concerns on this invention.

Explanation of symbols

10, 50, 60, 70, 80, 90 Corrugated tube 11 Main body 12 Slit 14 Outer end 14B Outer end inner peripheral surface 15 Inner end 15A Inner end outer peripheral surface 16, 61 Accommodating portion 17, 51, 62 , 71 Multi-stage type engagement means 18, 52, 64, 71 Multi-stage locking part 19, 52, 65, 73 Locking claw 21, 63 Presser piece 21A Inner surface 23 of the accommodating part 23 Thin hinge

Claims (3)

An overlap type corrugated tube in which slits are provided along a substantially cylindrical main body, and the main body is laminated so that both end portions in the circumferential direction become an outer end portion and an inner end portion, respectively. ,
An accommodating portion provided on one of the outer end portion and the inner end portion and accommodating the other of the outer end portion and the inner end portion;
A corrugated tube comprising: a multi-stage engaging means provided between the other of the outer end portion and the inner end portion and an inner surface of the housing portion. While the accommodating portion is provided by a pressing piece formed on the inner peripheral surface of the outer end,
A multi-stage locking portion having a substantially saw-toothed cross section provided on one of the inner peripheral surface of the outer end portion and the outer peripheral surface of the inner end portion in the accommodating portion;
The engaging means is provided with a locking claw provided on the other of the inner peripheral surface of the outer end portion and the outer peripheral surface of the inner end portion in the storage portion and capable of locking to the multistage locking portion. The corrugated tube according to claim 1, wherein the corrugated tube is provided.   The corrugated tube according to any one of claims 1 and 2, wherein a thin-walled hinge is provided along a generatrix of the main body.

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