JP5786677B2 - Corrugated tube with lock - Google Patents

Description

  The present invention relates to a technique for protecting a wire harness.

  A wire harness mounted on an automobile or the like may be routed in a routing route in a state where the wire harness is inserted through a corrugated tube as a protective material for protection from peripheral members. The corrugated tube may have a slit formed along the extending direction in a part of the circumferential direction in order to horizontally insert the wire harness (from a direction orthogonal to the extending direction).

  In the corrugated tube in which the slits are formed in this way, when bending, twisting, or the like occurs, the slits may open and the wire harness may be exposed or jumped outward.

  On the other hand, Patent Document 1 discloses a corrugated tube having a lock structure. This corrugated tube has a female side locking part formed continuously from the slit end on the one side of the peak part sandwiching the slit in the circumferential direction and a slit part on the other side of the peak part sandwiching the slit. And a male-side lock portion formed by continuously forming concave and convex portions for locking in the circumferential direction. And a corrugated tube can maintain a slit in a closed state by inserting a male side lock part in the inner surface side of a female side lock part, and fitting concave parts and convex parts.

JP-A-10-136531

  However, the corrugated tube according to the first embodiment of Patent Document 1 is fitted in a state where the insertion convex portion located at the tip of the female side lock portion overlaps the outer surface of the locking convex portion of the male side lock portion. Thus, the locked state is maintained. In other words, since the tip of the female lock part overlaps the outer surface of the male lock on the outer periphery of the corrugated tube, if an external force is applied to the tip of the female lock part, The part may come off from the male lock part, and the corrugated tube may open.

  Moreover, in the corrugated tube which concerns on 2nd Embodiment of patent document 1, the latching convex part of a female side lock part is covered by the latching convex part of a male side lock part, and the latching located in the front-end | tip of a female side lock part The locked state is maintained by the side wall of the convex portion being disposed in the locking concave portion of the male locking portion and locking to the outer surface of the side wall of the locking convex portion. In this shape, when an external force is applied in a direction in which the locking convex portion of the female side locking portion is disengaged from the locking convex portion of the male side locking portion, the side wall of the locking convex portion at the tip of the female side locking portion is locked to the male side locking. There is a possibility that the corrugated tube may be opened by releasing the engagement state of the male lock portion with respect to the engagement convex portion.

  Then, an object of this invention is to suppress opening of a slit more reliably.

A 1st aspect is a cylindrical corrugated tube with a lock | rock which has the slit formed in the circumferential direction part along the axial direction, Comprising: The convex peak part and concave valley which extend along the circumferential direction And a male lock part provided at one end of the main body part sandwiching the slit at the one end side of the main body part in the circumferential direction, and the other end side of the main body part. A locking structure portion having a female locking portion provided at the other end portion sandwiching the slit, and the male locking portion is recessed on the inner peripheral side from the peak portion on the slit side of the peak portion. A locking recess formed in a shape to be formed, and an inner locking projection formed continuously on the slit side of the locking recess, and the female lock portion is on the slit side of the peak portion. It is formed and can be fitted to the inner locking projection in a form in which the inner locking projection is arranged on the inner side. A has a outer locking recess and an end portion Bella extending along the circumferential direction in the slit side from the slit-side end of the outer locking recess, said end portion Vera, said outer locking recess In a state of being fitted to the inner locking projection, it is provided so as to be disposed in the locking recess, and the end spatula is set to have the same extension dimension as the circumferential dimension of the bottom of the locking recess. The outer locking recess moves to the outer peripheral side when a force is applied to release the state where the outer locking recess is engaged with the inner locking projection, and the tip of the end spatula is the peak of the locking recess. The contact state between the outer locking concave portion and the inner locking convex portion is maintained by contacting the side portion.

  A second aspect is a corrugated tube with a lock according to the first aspect, wherein the end spatula is formed in a shape extending from the inner peripheral side end of the outer locking recess to the slit side, The outer locking recess overlaps the bottom of the locking recess with the inner locking projection fitted.

A 3rd aspect is a corrugated tube with a lock | rock which concerns on a 1st aspect or a 2nd aspect , Comprising: The standing wall part orthogonal to the circumferential direction is provided in the side part of the said peak part of the said latching recessed part. Yes.

A 4th aspect is a corrugated tube with a lock | rock which concerns on a 3rd aspect, Comprising: The opposing standing wall part which opposes the said standing wall part is provided in the part by the side of the said slit of the latching recessed part.

  According to the corrugated tube with a lock according to the first aspect, the lock structure portion is in a state where the outer locking recess of the female locking portion is fitted to the inner locking projection of the male locking portion, and the slit side of the outer locking recess. An end spatula extending from the end toward the slit is disposed in the locking recess of the male lock. For this reason, it is possible to suppress the movement of the end portion on the slit side of the female lock portion in the locking recess of the male lock portion, and to suppress the turning of the end portion on the slit side of the female lock portion with respect to the male lock portion. Can do. Thereby, even if the external force of a twist or a bending direction acts, the opening of a slit can be suppressed more reliably.

  According to the corrugated tube with a lock according to the second aspect, the end spatula is formed in a shape extending from the inner peripheral side end of the outer locking recess to the slit side, and the outer locking recess is the inner locking projection. Since it overlaps with the bottom of the locking recess when fitted, the locking structure can be more reliably maintained in the locked state, and the opening of the slit can be more reliably suppressed.

According to the corrugated tube with a lock according to the first aspect, the end spatula is set to have the same extension dimension as the dimension in the circumferential direction of the bottom part of the locking recess, so that the female in the locking recess of the male locking part The movement of the end portion on the slit side of the lock portion can be more effectively suppressed, and the opening of the slit can be more reliably suppressed.

According to the lock corrugated tube with according to the third aspect, the portion of the mountain side of the engagement recess, since the vertical wall portion perpendicular to the circumferential direction is provided by the interference between the end portion Bella and vertical wall portion of the female locking portion Further, it is possible to more effectively suppress the slit side end portion of the female lock portion from slipping out of the locking recess.

According to the lock corrugated tube with the fourth aspect, the slit-side portion of the engagement recess, since the opposite wall part facing the vertical wall portion is provided, the slit-side end locking recess of the female locking portion Escape from the inside can be more effectively suppressed.

It is a perspective view of a corrugated tube with a lock. It is a top view of a corrugated tube with a lock | rock. It is the III-III sectional view taken on the line of FIG. It is a figure which shows the locked state of a lock | rock structure part. It is a figure which shows a locked state when external force is added to the direction where a slit opens.

  Hereinafter, the corrugated tube 10 with a lock according to the embodiment will be described (see FIGS. 1 and 2). This corrugated tube 10 with a lock is used to protect the wire harness 1 from the outside.

  Schematically, the corrugated tube 10 with a lock is a member formed in a cylindrical shape having a slit formed in a part of the circumferential direction along the axial direction. Here, the corrugated tube 10 with a lock is formed in a substantially cylindrical shape. And the corrugated tube 10 with a lock | rock can arrange | position the wire harness 1 inside through a slit, and protects the wire harness 1 in the state arrange | positioned inside. The corrugated tube 10 with a lock can be deformed into a closed state in which the slit is closed, and can be maintained in the closed state. Hereinafter, when simply describing the circumferential direction or the axial direction, the circumferential direction or the axial direction of the entire corrugated tube 10 with a lock is meant.

  The corrugated tube 10 with a lock includes a main body portion 20 and a lock structure portion 30. More specifically, the corrugated tube 10 with a lock has each part of the lock structure part 30 at both ends sandwiching the slit in the circumferential direction, and a main body part 20 having an arcuate cross section is formed between the parts.

  The main body 20 is formed in a shape in which convex ridges 22 and concave troughs 24 extending along the circumferential direction are provided alternately and continuously in the axial direction (see FIG. 2). That is, the main body 20 has a wave shape (substantially rectangular wave shape) in a cross-sectional view orthogonal to the circumferential direction. The mountain portion 22 and the valley portion 24 extend over the entire circumferential direction of the main body portion 20. And the main-body part 20 is bent in the form from which the peak parts 22 or the trough part 24 which are located in a line in the axial direction adjoin or separate.

  The lock structure portion 30 is provided in the circumferential direction at a male lock portion 32 provided at one end portion sandwiching the slit at one end side of the main body portion 20 and at the other end portion sandwiching the slit at the other end side of the main body portion 20. And a female lock portion 42 (see FIG. 3). The lock structure portion 30 is configured to be engageable with the male lock portion 32 in such a manner that the female lock portion 42 is overlapped on the outer peripheral side. And the lock | rock structure part 30 will be in the locked state which closed the slit of the corrugated tube 10 with a lock | rock in the state which the male locking part 32 and the female locking part 42 engaged (refer FIG. 4).

  The male lock portion 32 has a locking recess 34 and an inner locking projection 36.

  The locking recess 34 is a portion into which a slit side end portion of a female lock portion 42 described later is fitted. The locking recess 34 is provided on the slit side of the peak portion 22 on one end side in the circumferential direction of the main body portion 20. Further, the locking recess 34 is a portion that is formed in a shape that opens to the outer peripheral side and is concave to the inner peripheral side from the peak portion 22. More specifically, the locking recess 34 has a bottom portion on the same circumference as the inner circumferential side end portion of the peak portion 22 (on the same circumference of the valley portion 24). Further, the locking recess 34 is set such that the dimension in the circumferential direction of the bottom is larger than at least the thickness dimension of the corrugated tube 10 with a lock.

  In addition, a standing wall portion 35 that intersects in the circumferential direction is provided on a portion of the locking recess 34 on the mountain portion 22 side. Here, the locking recess 34 is formed continuously at one end in the circumferential direction of the peak portion 22. That is, the standing wall portion 35 is a portion that also serves as a wall portion at one end in the circumferential direction of the peak portion 22. More preferably, the standing wall portion 35 may be formed in a shape orthogonal to the circumferential direction when the lock structure portion 30 is locked. The term “perpendicular to the circumferential direction” includes a manufacturing error set at the time of design and a range of deformation error when the lock structure 30 is locked.

  In addition, an opposing standing wall portion 37 that is opposed to the standing wall portion 35 and is orthogonal to the circumferential direction is provided on the slit side portion of the locking recess 34. This opposed upright wall portion 37 is a portion that also serves as a wall portion of the end portion on the side of the peak portion 22 of the inner locking convex portion 36. Note that the standing wall portion 35 and the opposite standing wall portion 37 extend at regular intervals in the inner and outer directions from the viewpoint of making it difficult to pass through the slit side end portion of the female lock portion 42 (described later) fitted into the locking recess 34. It is more preferable.

  The inner locking convex portion 36 is a portion that fits into an outer locking concave portion 44 of the female lock portion 42 described later. More specifically, the inner locking convex portion 36 is formed in a convex shape that is continuous with the slit side of the locking concave portion 34 and protrudes toward the outer peripheral side. Here, the protrusion dimension of the inner locking protrusion 36 is set to be smaller than the protrusion dimension of the peak portion 22. Further, the inner locking projection 36 is set such that the axial dimension is smaller than the axial dimension of the peak portion 22. The inner locking projection 36 is provided at one end of the corrugated tube 10 with a lock with a slit in the circumferential direction.

  Further, in the male lock portion 32, an extension portion 38 is provided on the slit side of the valley portion 24. The extending portion 38 is formed in a flat shape extending from the valley portion 24 on the same circumference. Further, the extending portion 38 is located on the same circumference continuously from the bottom portion of the locking concave portion 34 and the inner peripheral side end portion of the inner locking convex portion 36.

  The female lock portion 42 has an outer locking recess 44 and an end spatula 46.

  The outer locking concave portion 44 is a portion that can be fitted (externally fitted) to the inner locking convex portion 36 in such a manner that the inner locking convex portion 36 is disposed inside (see FIG. 4). The outer locking recess 44 is provided on the slit side of the peak portion 22 on the other circumferential end side of the peak portion 22. Further, the outer locking concave portion 44 is formed in a concave shape that opens to the inner peripheral side (in other words, a convex shape that protrudes to the outer peripheral side). Here, the outer locking concave portion 44 is provided on the slit side with a concave portion opening on the outer peripheral side on the other end side in the circumferential direction of the peak portion 22. The outer locking recess 44 is set to have the same dimension as the mountain portion 22 in the axial direction. Further, the outer locking recess 44 is set so that the inner space is larger (slightly larger here) than the inner locking projection 36 in the axial direction in relation to the inner locking projection 36. Preferably, the outer locking recess 44 and the inner locking projection 36 can be fitted with no gap in the axial direction.

  Moreover, as for the outer side latching recessed part 44, the inner peripheral side edge part is set to the position of the outer peripheral side rather than the trough part 24 (refer FIG. 3). Here, the outer locking concave portion 44 protrudes from the valley portion 24 to the outer peripheral side from the position on the outer peripheral side by substantially the same dimension as the thickness dimension of each part of the corrugated tube 10 with lock in the inner and outer directions. The outer peripheral side end of the outer locking recess 44 is set substantially on the same circumference as the outer peripheral side end of the peak portion 22. That is, when the outer locking recess 44 is fitted on the inner locking projection 36, the inner peripheral side end thereof is disposed on the bottom and the extension 38 of the locking recess 34. Also, the outer peripheral side end portion is configured to be positioned substantially on the same circumference with respect to the crest portion 22 on one end side in the circumferential direction across the slit.

  The end spatula 46 is a part that extends from the slit-side end of the outer locking recess 44 to the slit side. The end spatula 46 is provided in the locking recess 34 so that the outer locking recess 44 is fitted in the inner locking projection 36 (in other words, can be fitted). More specifically, the end spatula 46 extends along the circumferential direction and extends over the entire axial direction. Here, the end spatula 46 is formed in a shape extending from the inner peripheral end of the outer locking recess 44 to the slit side. The end spatula 46 may be disposed on the bottom side of the locking recess 34 in a state where the outer locking recess 44 is fitted to the inner locking projection 36. It should be on the bottom. Here, overlapping with the bottom portion is not limited to the case where the bottom portion is entirely contacted, but may be a partial contact. Here, the end spatula 46 is provided on the inner peripheral side from the inner peripheral end of the outer locking recess 44 (see FIG. 3).

  The end spatula 46 is set to have an extension dimension that is the same as or smaller than the dimension in the circumferential direction of the bottom of the locking recess 34. The end spatula 46 is preferably set to have the same extension dimension as the dimension in the circumferential direction of the bottom of the locking recess 34. However, the same dimension in the circumferential direction of the bottom portion of the locking recess 34 is not limited to the case of exact matching, and includes a range of manufacturing errors set in advance at the design stage.

  An extension 48 is provided on the slit side of the valley 24 in the female lock 42. The extending portion 48 is formed in a flat shape extending from the outer peripheral side to the slit side from the valley portion 24. Further, the extending portion 48 is located on the same circumference continuously with the base end portion of the outer locking recess 44. Further, the extending portion 48 is located on the outer peripheral side from the end spatula 46.

  The corrugated tube 10 with a lock is formed as follows, for example. First, the molten synthetic resin material is extruded into a cylindrical shape using an extrusion mold. The extruded cylindrical body is brought into close contact with the mold by blow molding or vacuum molding to form a shape along the mold. And a slit is formed by cutting open the obtained cylindrical body along an axial direction in a part of circumferential direction. Here, the inner locking convex portion 36 of the male locking portion 32 and the end spatula 46 of the female locking portion 42 are molded into a cylindrical body that is continuous in the circumferential direction. The cylindrical body is cut open at the boundary portion.

  Next, the attachment method with respect to the wire harness 1 of the corrugated tube 10 with a lock | rock is demonstrated.

  First, the wire harness 1 is disposed inside the corrugated tube 10 with a lock through a slit, that is, a gap between the male lock portion 32 and the female lock portion 42 (see FIG. 3).

  In this state, the lock structure 30 is brought into a locked state (see FIG. 4). That is, the female lock portion 42 is put on the male lock portion 32 while elastically deforming the corrugated tube 10 with a lock so as to reduce the diameter. More specifically, the inner latching convex portion 36 is fitted inside the outer latching concave portion 44, and both are fitted, and the end spatula 46 is fitted into the latching concave portion 34. Here, the end spatula 46 overlaps the outer peripheral side along the bottom of the locking recess 34. This state is a locked state of the lock structure portion 30.

  In the locked state, the corrugated tube 10 with the lock is configured so that the inner surface of the wall portion on the slit side of the outer locking recess 44 is opposed to the inner locking projection 36 due to the force of returning to the shape at the time of molding (unlocked). Locks to the standing wall portion 37. That is, the force for returning to the shape at the time of molding is a force for separating the male lock portion 32 and the female lock portion 42 in the circumferential direction so as to increase the diameter, and the inner surface of the outer locking recess 44 and the opposed vertical wall portion. 37 so that they abut against each other. Preferably, both wall portions are in surface contact with each other.

  In addition, when an external force in the twisting or bending direction acts on the corrugated tube 10 with a lock in the locked state, a force may act in a direction in which the locked state of the lock structure 30 is released (see FIG. 5). In other words, the force is a force in which the female lock portion 42 floats with respect to the male lock portion 32. Thus, roughly, a force toward the outer peripheral side and a circumferential force that attempts to return to the shape at the time of molding act on the male lock portion 32. Hereinafter, the state of the lock structure 30 when the external force is applied will be described.

  That is, the inner surface of the wall portion on the slit side of the outer locking concave portion 44 is more strongly pressed against the opposed standing wall portion 37 (particularly the tip portion) of the inner locking convex portion 36. Thereby, the base end side part of the outer side latching recessed part 44 tends to displace to the standing wall part 35 side. Then, the end spatula 46 is pressed against the standing wall 35. In other words, the distal end side portion of the female lock portion 42 is sandwiched between the standing wall portion 35 and the opposed standing wall portion 37 while being engaged.

  For this reason, the front end portion of the female lock portion 42 is difficult to come out between the upright wall portion 35 and the opposed upright wall portion 37, and is prevented from floating with respect to the male lock portion 32. That is, release of the locked state of the lock structure portion 30 is suppressed.

  According to the corrugated tube 10 with a lock according to the above-described embodiment, the lock structure portion 30 is in the state in which the outer engagement concave portion 44 of the female lock portion 42 is fitted to the inner engagement convex portion 36 of the male lock portion 32. An end spatula 46 extending from the slit-side end of the stop recess 44 toward the slit is disposed in the locking recess 34 of the male lock portion 32. Therefore, the movement of the slit-side end of the female lock portion 42 in the locking recess 34 of the male lock portion 32 can be suppressed, and the slit-side end portion of the female lock portion 42 with respect to the male lock portion 32 can be suppressed. Turn over can be suppressed. Thereby, even if the external force of a twist or a bending direction acts, the opening of a slit can be suppressed more reliably.

  Further, the end flat 46 is formed in a shape extending from the inner peripheral end of the outer locking recess 44 toward the slit, and the outer locking recess 44 is engaged with the inner locking projection 36. According to the configuration that overlaps the bottom of the stop recess 34, the lock structure 30 can be more reliably maintained in the locked state, and the opening of the slit can be more reliably suppressed.

  Further, according to the configuration in which the end spatula 46 is set to the same extension dimension as the dimension of the bottom of the locking recess 34 in the circumferential direction (can be fitted into the bottom side portion of the locking recess 34), the male lock The movement of the slit side end portion of the female lock portion 42 in the locking recess 34 of the portion 32 can be more effectively suppressed, and the opening of the slit can be more reliably suppressed.

  Further, according to the configuration in which the standing wall portion 35 orthogonal to the circumferential direction is provided on the mountain side portion of the locking recess 34, the female locking portion 42 is caused by the interference between the end spatula 46 and the standing wall 35 of the female locking portion 42. It can suppress more effectively that the slit side edge part of 42 slips out from the inside of the latching recessed part 34. FIG.

  Further, according to the configuration in which the opposing standing wall portion 37 that is opposed to the standing wall portion 35 and is orthogonal to the circumferential direction is provided in the slit side portion of the locking recess portion 34, the slit side end portion of the female locking portion 42 is the locking recess portion. It is possible to more effectively suppress the escape from the inside.

  So far, in the lock structure portion 30, the male lock portion 32 is formed in a shape in which the locking recess 34 and the inner locking projection 36 are continuously extended from the peak portion 22, and the female lock portion 42 is extended from the peak portion 22. Although the example in which the outer locking recess 44 is formed in a continuously extending shape has been described, the present invention is not limited to this shape. For example, the lock structure portion may have a plurality of concave and convex portions for fitting, in which the male lock portion and the female lock portion have more shapes than those described above. Also in this case, it is preferable that the end spatula 46 of the female lock portion is arranged at the bottom of the locking recess 34.

  Further, instead of the standing wall portion 35 and the opposed standing wall portion 37, a wall portion that is inclined (not orthogonal) with respect to the circumferential direction may be provided. However, from the viewpoint of preventing the female lock portion 42 from being pulled out from the locking recess 34 at the distal end portion, it is preferable that the standing wall portion 35 and the opposed standing wall portion 37 are provided.

  As mentioned above, although the corrugated tube 10 with a lock | rock was demonstrated in detail, above-described description is an illustration in all the phases, Comprising: This invention is not limited to it. The various modifications described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Corrugated tube with a lock | rock 20 Main part 22 Peak part 24 Valley part 30 Lock structure part 32 Male lock part 34 Locking recessed part 35 Standing wall part 36 Inner side locking convex part 37 Opposite standing wall part 42 Female locking part 44 Outer side locking Recess 46 End Bella

Claims (4)

A corrugated tube with a cylindrical lock having a slit formed in the circumferential direction part along the axial direction,
A main body provided with convex peaks and concave valleys extending along the circumferential direction alternately and continuously in the axial direction;
In the circumferential direction, a male lock portion provided at one end of the main body portion sandwiching the slit and a female lock portion provided at the other end of the main body portion sandwiching the slit. Having a lock structure;
With
The male locking portion includes a locking recess formed in a shape that is recessed on the inner peripheral side of the peak portion on the slit side of the peak portion, and an inner side formed continuously on the slit side of the locking recess portion. A locking projection,
The female locking portion is formed on the slit side of the peak portion, and has an outer locking recess that can be fitted to the inner locking projection in a form in which the inner locking projection is disposed on the inner side, and the outer side An end spatula extending along the circumferential direction from the slit side end of the locking recess to the slit side;
The end spatula is provided so that it can be disposed in the locking recess, with the outer locking recess fitted into the inner locking projection .
The end spatula is set to an extension dimension that is the same as the dimension in the circumferential direction of the bottom of the locking recess, and a force is applied to release the state where the outer locking recess is engaged with the inner locking protrusion. Sometimes moved to the outer peripheral side, and the tip end portion of the end spatula comes into contact with the portion on the peak portion side of the locking recess, thereby bringing the outer locking recess and the inner locking projection into a fitted state. Maintain corrugated tube with lock. The corrugated tube with a lock according to claim 1,
The end spatula is formed in a shape extending from the inner peripheral side end of the outer locking recess to the slit side, and the outer locking recess is fitted to the inner locking projection, Corrugated tube with lock that overlaps the bottom of the locking recess. It is a corrugated tube with a lock according to claim 1 or 2,
A corrugated tube with a lock, wherein a standing wall portion orthogonal to the circumferential direction is provided in a portion on the mountain portion side of the locking recess . It is a corrugated tube with a lock according to claim 3,
A corrugated tube with a lock , wherein a portion of the locking recess on the slit side is provided with an opposing standing wall portion that faces the standing wall portion .

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