JP2015042041A - Exterior member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exterior member which allows for reduction of the load on a manufacturing worker.SOLUTION: An exterior member includes a body 23 for housing wires, and a mold 25 at a part of the body in the longitudinal direction. A first slit 27 is formed in the body over the longitudinal direction, and a second slit 29 interconnecting the first slit and the outside is formed in the mold over the longitudinal direction. The second slit has a first intersection 29B where a straight line L1 passing the center A of the body and the first slit crosses the center line L2.

Description

  The present invention relates to an exterior member.

  In a car or the like, a wire harness for transmitting electric power from a battery or the like or a control signal from a control device to various electronic devices to be mounted is routed. Some of such wire harnesses include various exterior members such as a straight tube and a corrugated tube in order to accommodate and protect an electric wire (see, for example, Patent Documents 1 and 2).

JP 2012-217295 A JP 2003-309919 A

  These exterior members are often provided with slits in the longitudinal direction so that they can be attached to the electric wires so that they can be covered. In this case, an electric wire may protrude from the slit after the wiring harness is routed. In particular, at the bent portion, there is a possibility that the slit is wide open and the electric wire is likely to protrude. If an electric wire protrudes from an exterior member, an electric wire may be damaged by the interference etc. which exist in a wiring location. Moreover, there is a possibility that foreign matter or the like enters the inside from the slit after the wiring harness is routed.

  Therefore, as described in Patent Document 2, it is assumed that the tape is wound around the outer surface of the exterior member after the electric wire is accommodated to prevent the electric wire from protruding and foreign matter from entering. However, this tape winding work may be a burden on the manufacturing worker.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the exterior member which can reduce the burden of a manufacturing operator.

In order to achieve the above-described object, the exterior member according to the present invention is characterized by the following points.
(1) A main body for accommodating an electric wire, which is formed in a cylindrical shape and has flexibility,
An exterior member comprising a mold part molded on at least a part of the outer peripheral side in the longitudinal direction of the main body part,
A first slit is formed in the main body portion along its longitudinal direction,
The mold part is formed with a second slit that communicates the first slit and the outside over the longitudinal direction thereof,
The second slit has a first intersecting portion where a center line and a straight line passing through the center of the main body portion and the first slit intersect when viewed from the longitudinal direction of the mold portion.

(2) The exterior member of (1) above,
The second slit further includes a second intersecting portion where a center line and a center line of the first intersecting portion intersect when viewed from the longitudinal direction of the mold portion.

(3) A main body for accommodating an electric wire, which is formed in a cylindrical shape and has flexibility,
An exterior member comprising a mold part molded on at least a part of the outer peripheral side in the longitudinal direction of the main body part,
A first slit is formed in the main body portion along its longitudinal direction,
The mold part is formed with a second slit that communicates the first slit and the outside over the longitudinal direction thereof,
One surface of the inner surface of the mold part that defines the second slit has a locking protrusion that protrudes toward the other surface, and the locking protrusion is engaged with the other surface. Having a locking recess to stop,
The locking projection and the locking recess transition between a locked state and a released state when the mold portion is deformed so that the one surface and the other surface approach and separate from each other.

In the exterior member of the above (1), when the electric wire accommodated in the main body portion tries to go out from the first slit, the electric wire interferes with the inner surface of the first intersecting portion of the second slit. Hard to go outside. This is a straight line that passes through the center of the main body (which can be regarded as the center of the electric wire accommodated in the main body) and the first slit, which is a trajectory that normally passes when the electric wire tries to go outside from the main body. This is because the center line of the first intersecting portion intersects with the inner surface of the first intersecting portion when the electric wire moves on the straight line. That is, when an electric wire moves in only one direction and tries to go outside, such as when the electric wire tries to go outside from the main body due to an undesired force acting after routing, The electric wire always contacts the inner surface of the first intersecting portion of the second slit. Thus, in the exterior member of the above (1), the electric wire accommodated in the main body part is difficult to go out. Further, according to the exterior member of the above (1), when a foreign object or the like tries to enter the inside, the foreign object or the like comes into contact with the inner surface of the first slit or the inner surface of the first intersecting portion. As in the case of exiting, it is difficult for foreign matter or the like to enter the interior. As a result, according to the exterior member of the above (1), the tape winding operation can be omitted or simplified, so that the exterior member capable of reducing the burden on the manufacturing operator can be provided.
In addition, according to the exterior member of the above (1), when an operator applies an artificial force when attaching the exterior member to the electric wire or removing the electric wire from the exterior member, Since the moving direction of the electric wire can be appropriately changed, even if the center line of the first intersecting portion of the second slit intersects with a straight line passing through the center of the main body, the electric wire extends in the direction corresponding to the shape of the first intersecting portion. If it is taken out, the attaching and detaching operations can be carried out easily.

  In the exterior member of the above (2), when the electric wire is about to go out from the main body, the electric wire easily comes into contact with the inner surface of the first intersecting portion of the second slit, and further, the center of the first intersecting portion Since it has the 2nd intersection part which a line and a center line cross, an electric wire tends to contact also the inner surface of a 2nd intersection part. For this reason, the electric wire accommodated in the main body is more difficult to come out. In addition, foreign matter or the like is less likely to enter the inside.

  In the exterior member of the above (3), when the exterior member is attached to the electric wire, the locking projection and the locking recess are released, and after the mounting of the exterior member, the locking projection and the locking recess are locked. Can be in a state. Therefore, it is possible to restrict the passage of the second slit such as the electric wire and the foreign matter as the locked state after the attachment while allowing the passage of the second slit of the wire as the released state at the time of attachment. As a result, according to the exterior member of the above (3), the tape winding operation can be omitted or simplified, so that the exterior member capable of reducing the burden on the manufacturing operator can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the exterior member which can reduce a burden of a manufacturing operator can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a perspective view showing the wire harness according to the first embodiment. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is an overall perspective view of the micro molding machine. FIG. 4 is a cross-sectional view showing the main body, the mold, and the core after clamping. FIG. 5 is a cross-sectional view showing an exterior member according to the second embodiment. FIG. 6 is a cross-sectional view showing an exterior member according to the third embodiment.

<First Embodiment>
Hereinafter, the wire harness according to the first embodiment will be described with reference to FIGS. 1 is a perspective view showing the wire harness according to the first embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  As shown in FIG. 1, the wire harness 1 according to the first embodiment includes an electric wire bundle 11 in which a plurality of electric wires 15 are bundled in a bundle, an exterior member 21 that covers a part of the electric wire bundle 11 in the longitudinal direction, It has.

  The electric wire bundle 11 is formed by converging electric wires 15 having a conductive core wire (not shown) and an insulating coating 13 made of a synthetic resin covering the outer periphery of the core wire into a bundle shape. . The wire bundle 11 is bound by an adhesive tape such as a wire harness tape (not shown). Note that the wire bundle 11 may be one in which a plurality of wires 15 are twisted and converged into a bundle shape. Further, a single wire may be used instead of the wire bundle 11.

  The exterior member 21 includes a cylindrical main body portion 23 having flexibility, and a mold portion 25 provided on the outer peripheral side of the main body portion 23.

  The main body portion 23 is a so-called corrugated tube having a cylindrical shape with both ends opened, and a convex portion 23a and a concave portion 23b provided alternately and repeatedly on the outer peripheral surface in the longitudinal direction. As shown in FIGS. 1 and 2, a first slit 27 is formed in the main body portion 23 along the longitudinal direction thereof. The wire bundle 11 is inserted into the main body portion 23 from the opening on the one end side in the longitudinal direction and the first slit 27. A part of the wire bundle 11 is accommodated in the main body 23. The main body portion 23 is made of a synthetic resin such as polypropylene, and is formed in a cylindrical shape and has flexibility.

  The mold part 25 is made of a synthetic resin such as polypropylene, for example, and is fixed to the outer peripheral surface of the main body part 23 by low pressure injection molding (molding) using a micro molding machine, which will be described later, and is formed integrally with the main body part 23. . The mold part 25 has a uniform cross-sectional shape over the longitudinal direction. As shown in FIG.1 and FIG.2, the 2nd slit 29 is formed in the mold part 25 over the longitudinal direction. The second slit 29 communicates the first slit 27 with the outside.

  With reference to FIG. 2, the cross-sectional shape (namely, cross-sectional shape seen from the longitudinal direction of the mold part 25) of the mold part 25 is demonstrated. As shown in FIG. 2, the mold part 25 has an annular part that covers the main body part 23 and a square part that protrudes from the annular part. A second slit 29 is formed in the mold part 25 so as to communicate the first slit 27 and the outside. The second slit 29 includes a linear first portion 29A continuous to the first slit 27, and a linear second portion 29B (first intersecting portion) continuous to the first portion 29A and communicating with the outside. Have. The center line of the first portion 29 </ b> A overlaps a straight line L <b> 1 that passes through the center A of the main body 23 and the center B of the first slit 27. Center line L2 of second portion 29B intersects with straight line L1 (in other words, intersects).

  Next, with reference to FIG.3 and FIG.4, the manufacturing method of the exterior member 21 using a micro molding machine is demonstrated. FIG. 3 is an overall perspective view of the micro-molding machine, and FIG. 4 is a cross-sectional view showing the main body, the mold, and the core after mold clamping.

  The manufacturing method of the exterior member 21 according to the first embodiment includes a mold clamping step of clamping the molding die 43 so that the main body portion 23 is disposed inside, and defining a cavity 65 inside the molding die 43; And an injection step of injecting the molten synthetic resin into the cavity 65 at a low pressure. Further, after the synthetic resin injected and filled in the cavity 65 is cooled and solidified, the molded exterior member 21 is taken out from the molding die 43. The molding die 43 includes an upper die 61 and a lower die 63.

  As shown in FIG. 3, the micro molding machine 41 for integrally molding the mold part 25 on the main body part 23 is a molding machine that can be operated by one worker without external power such as an electric motor, and is made of a synthetic resin. The molding die 43, a clamping device (not shown), and a low-pressure injection device 45 that injects molten resin into the molding die 43 under pressure are configured.

  The low pressure injection device 45 includes a heating cylinder 47 provided with a heater for heating and melting synthetic resin such as nylon resin, a plunger 49 for injecting molten resin in the heating cylinder 47 from a nozzle (not shown), and a plunger 49. An apparatus column that has an injection cylinder 51 that moves forward, a handle 53 that drives the injection cylinder 51, and a temperature controller 55 that maintains the heating temperature of the heating cylinder 47 at a desired temperature, and these stand upright on a pedestal 57. 59.

  Note that the micro molding machine in this embodiment has a maximum amount of resin that can be molded by one injection molding of about 10 g, and when the mold 43 is clamped, an air cylinder or a link is used. It can be used manually. Therefore, the low pressure injection device 45 may drive the injection cylinder 51 by external power such as an electric motor or air. As the micro molding machine 41, for example, an injection molding apparatus disclosed in JP 2010-260297 A, JP 2012-30429 A, or the like can be used.

  As shown in FIG. 4, in the mold clamping process, the main body portion 23 is clamped by the molding die 43 with the core 71 inserted therein. As a result, a cavity 65 is defined inside the mold 43. The core 71 (mandrel) is formed in a solid cylindrical shape, and has an outer diameter that is substantially the same as the inner diameter of the recess 23 b of the main body 23. The core 71 prevents the main body 23 from being crushed and deformed during molding. The upper die 61 includes a gate 67 that allows the cavity 65 and the nozzle of the low-pressure injection device 45 to communicate with each other.

  In an injection process subsequent to the mold clamping process, molten synthetic resin (not shown) is injected from the gate 67 at a low pressure. Thereby, the molten resin is filled in the cavity 65. The exterior member 21 according to the first embodiment is manufactured by the manufacturing method including the steps described above.

Below, the effect | action and effect of the exterior member 21 which concern on 1st Embodiment are demonstrated.
In the exterior member 21, when the electric wire bundle 11 accommodated in the main body portion 23 passes through the first slit 27 and the second slit 29 in order and comes to the outside, the electric wire bundle 11 is the second of the second slit 29. It is easy to come into contact with the inner surface of the portion 29B (first intersecting portion), and it is difficult to come out from the mold portion 25. This can be regarded as the center A of the main body part 23 (the center of the electric wire bundle 11 accommodated in the main body part 23), which is a trajectory that normally passes when the electric wire bundle 11 tries to go outside from the main body part 23. ) And the straight line L1 passing through the center B of the first slit 27 and the center line L2 of the second portion 29B intersect each other, so that when the wire bundle 11 moves on the straight line L1, the inner surface of the second portion 29B This is because they always come into contact.

  That is, an undesired force acts after routing (in other words, without applying artificial force), as in the case where the wire bundle 11 is about to go out of the main body 23. When the bundle 11 moves only in one direction (ie, moves upward in FIG. 2) and tries to come out, the wire bundle 11 always comes into contact with the inner surface of the second portion 29B.

  For this reason, in the exterior member 21, the occurrence of protrusion of the wire bundle 11 can be suppressed by the frictional force acting between the inner surface of the second portion 29 </ b> B and the wire bundle 11. Thus, in the exterior member 21, the wire bundle 11 accommodated in the main body portion 23 is difficult to come out. Further, according to the exterior member 21, when a foreign object or the like tries to enter the inside, the foreign object or the like comes into contact with the inner surface of the first slit 27 or the inner surface of the second portion 29B. As in the case of exiting, it is difficult for foreign matter or the like to enter the interior. As a result, according to the exterior member 21, the tape winding operation can be omitted or simplified, so that the exterior member capable of reducing the burden on the manufacturing operator can be provided.

Second Embodiment
Hereinafter, the exterior member according to the second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view showing an exterior member according to the second embodiment. As shown in FIG. 5, the exterior member 21 </ b> B according to the second embodiment is different from the exterior member 21 according to the first embodiment in the cross-sectional shape. Since the other points are the same as those of the exterior member 21, the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, the second slit 29 is continuous with the linear first portion 29 </ b> A continuous with the first slit 27, the linear second portion 29 </ b> B (first intersecting portion), and the second portion 29 </ b> B. And a third portion 29C (second intersecting portion) on a straight line communicating with the outside. The center line L2 of the second portion 29B intersects with the straight line L1 passing through the center A of the main body 23 and the center B of the first slit 27 (in other words, intersects), and the center of the third portion 29C. The line L3 intersects with the center line L2 of the second portion 29B (in other words, intersects).

  Therefore, in the exterior member 21 </ b> B, when the wire bundle 11 is about to go outside from the main body portion 23, the wire bundle 11 easily comes into contact with the inner surface of the second portion 29 </ b> B (first intersecting portion) of the second slit 29. Furthermore, since it has a third portion 29C (second intersecting portion) where the center line L2 of the second portion 29B and the center line L3 intersect, the wire bundle 11 also contacts the inner surface of the third portion 29C. It's easy to do. For this reason, the wire bundle 11 accommodated in the main body portion 23 is more difficult to come out. In addition, foreign matter or the like is less likely to enter the inside.

<Third Embodiment>
Hereinafter, the exterior member according to the third embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view showing an exterior member according to the third embodiment. As illustrated in FIG. 6, the exterior member 21 </ b> C according to the third embodiment is different from the exterior member 21 according to the first embodiment in the cross-sectional shape. Since the other points are the same as those of the exterior member 21, the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, in the exterior member 21 </ b> C, the inner surface 31 that is one of the inner surfaces 31 and 32 of the mold part 25 that defines the second slit 29 protrudes toward the other inner surface 32. A stop protrusion 33 is provided. The locking projection 33 has a locking portion 34 that is wider at the distal end side than at the proximal end side. Further, the inner surface 32 which is the other surface has a locking recess 37. Since the opening of the locking recess 37 is narrower than that of the locking portion 34, the locking portion 34 is caught in the opening when the locking portion 34 accommodated therein tries to exit from the opening. In this way, the locking projection 33 can be locked to the locking recess 37, and in FIG. 6, the locking projection 33 and the locking recess 37 are in a locked state.

  Also, when releasing the locking of the locking projection 33 and the locking recess 37, such as during the work of removing the exterior member 21C, the operator makes the inner surface 31 and the inner surface 32 approach and separate. By deforming the mold portion 25, the locking portion 34 is extracted from the opening of the locking recess 37, the locking projection 33 and the locking recess 37 are unlocked, and the locking projection 33 is locked. The recess 37 can be released. Thus, in the exterior member 21 </ b> C, the locking protrusion 33 and the locking recess 37 can transition between the locked state and the released state.

  For this reason, according to the exterior member 21C, when the exterior member 21C is attached to the wire bundle 11, the locking projection 33 and the locking recess 37 are released, and after the installation of the exterior member 21C, the locking projection 33 and the locking recess 37 can be locked. Therefore, the passage of the second bundle 29 of the wire bundle 11 can be allowed in the released state at the time of attachment, while the passage of the second bundle 29 of the wire bundle 11 and foreign matters can be restricted after the attachment in the locked state.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the above embodiment, the main body portion 23 is a so-called corrugated tube, but it may be a straight tube having no irregularities on the surface.

  Moreover, in the said embodiment, although the mold part 25 was formed in the outer peripheral side of the linear part of the main-body part 23, depending on the installation location and use condition of the exterior members 21, 21B, and 21C, a main-body part 23 may be formed at a bent portion. Moreover, in the said embodiment, although the mold part 25 was formed in the outer peripheral side of a part in the longitudinal direction of the main-body part 23, you may form over the whole in the longitudinal direction of the main-body part 23.

  Moreover, in the said embodiment, although the mold part 25 was adhering to the main-body part 23, as long as it was engaged with the main-body part 23 in the state in which the movement to the longitudinal direction of the main-body part 23 was controlled, It does not necessarily have to be fixed to the main body 23. For example, the movement of the main body part 23 in the longitudinal direction is restricted by the hook-shaped locking part (or the convex part 23 a) projecting from the outer surface of the main body part 23, so that the mold part 25 becomes the main body part 23. To be engaged.

  Moreover, in the said embodiment, although the main-body part 23 and the mold part 25 were formed with the same material (polypropylene), you may form with a different material. For example, if the mold part 25 is formed of a material harder than the material of the main body part 23, the deformation of the main body part 23 can be restricted. When it is desired to firmly fix both members, it is preferable to form both members from a material having relatively high compatibility.

  In the first and second embodiments, the first portion 29A, the second portion 29B (first intersecting portion), and the third portion 29C (second intersecting portion) are all formed in a straight line. Other shapes may also be used. For example, the second portion 29B (first intersecting portion) and the third portion 29C (second intersecting portion) may be curved and continuous in an arc shape. In the first and second embodiments, the second portion 29B (first intersecting portion) has a center line L2 with respect to a straight line L1 that passes through the center A of the main body 23 and the center B of the first slit 27. However, the center line L2 may be formed so as to intersect the straight line L1 at an acute angle. In the case of crossing at an acute angle, the wire bundle 11 that is about to come out from the main body 23 abuts against the inner surface of the second portion 29B, so that it is more difficult to go out.

  Moreover, in the said 2nd Embodiment, the 2nd slit 29 is the 2nd part 29B (1st cross | intersection part) where a straight line L1 passing the center A of the main-body part 23 and the center B of the 1st slit 27 intersects. , The center line L2 of the second part 29B and the third part 29C (second intersecting part) where the center line L3 intersects, but the number of intersecting parts is not limited to this, for example, In addition, the center portion L3 of the third portion 29C may further include a fourth portion (third intersecting portion) where the center line intersects.

  Moreover, in the said 3rd Embodiment, although the latching protrusion 33 had the wide latching | locking part 34, the shape of the latching protrusion 33 can be latched with the latching recessed part 37, and. It only has to be present and is not limited to those exemplified.

Below, the exterior members 21, 21B, and 21C according to the embodiment will be briefly summarized.
(1) The exterior members 21, 21 </ b> B are formed in a cylindrical shape and have flexibility, a main body portion 23 for housing the electric wire bundle 11 (electric wires), and at least a part of the main body portion 23 in the longitudinal direction. And a mold part 25 molded on the outer peripheral side. A first slit 27 is formed in the main body portion 23 along the longitudinal direction thereof. The mold portion 25 is formed with a second slit 29 that communicates the first slit 27 and the outside along the longitudinal direction thereof. When viewed from the longitudinal direction of the mold portion 25, the second slit 29 is a second portion 29B (second portion) where the straight line L1 passing through the center A of the main body portion 23 and the first slit 27 intersects with the center line L2. 1 intersection portion).
(2) In the exterior member 21B, the second slit 29 intersects the center line L2 of the second portion 29B (first intersecting portion) and the center line L3 when viewed from the longitudinal direction of the mold portion 25. The third portion 29C (second intersecting portion) is further included.
(3) The exterior member 21 </ b> C is formed in a cylindrical shape and has flexibility, the main body 23 for housing the wire bundle 11 (electric wire), and at least a part of the outer peripheral side in the longitudinal direction of the main body 23. And a mold part 25 formed by molding. A first slit 27 is formed in the main body portion 23 along the longitudinal direction thereof. The mold portion 25 is formed with a second slit 29 that communicates the first slit 27 and the outside along the longitudinal direction thereof. One inner surface 31 of the inner surfaces of the mold part 25 that defines the second slit 29 has a locking projection 33 that protrudes toward the other inner surface 32, and the other inner surface 32 It has the latching recessed part 37 which the latching protrusion 33 latches. The locking projection 33 and the locking recess 37 are formed into a locked state and a released state when the mold portion 25 is deformed so that the one inner surface 31 and the other inner surface 32 approach and separate from each other. Transition to.

1 Wire harness 11 Wire bundle (electric wire)
13 Cover 15 Electric wire 21, 21B, 21C Exterior member 23 Body portion 23a Convex portion 23b Concave portion 25 Mold portion 27 First slit 29 Second slit 29A First portion 29B Second portion (first intersecting portion)
29C 3rd part (2nd intersection)
31 Inner surface (one surface)
32 Inner surface (the other surface)
33 Locking projection 34 Locking portion 37 Locking recess 41 Micro molding machine 43 Molding die 45 Low pressure injection device 61 Upper die 63 Lower die 65 Cavity 71 Core

Claims (3)

A main body for accommodating an electric wire, which is formed in a cylindrical shape and has flexibility;
An exterior member comprising a mold part molded on at least a part of the outer peripheral side in the longitudinal direction of the main body part,
A first slit is formed in the main body portion along its longitudinal direction,
The mold part is formed with a second slit that communicates the first slit and the outside over the longitudinal direction thereof,
The second slit, when viewed from the longitudinal direction of the mold portion, has a first intersecting portion where a center line and a straight line passing through the center of the main body portion and the first slit intersect.
The exterior member characterized by the above-mentioned. The second slit further has a second intersecting portion where a center line and a center line of the first intersecting portion intersect when viewed from the longitudinal direction of the mold part,
The exterior member according to claim 1. A main body for accommodating an electric wire, which is formed in a cylindrical shape and has flexibility;
An exterior member comprising a mold part molded on at least a part of the outer peripheral side in the longitudinal direction of the main body part,
A first slit is formed in the main body portion along its longitudinal direction,
The mold part is formed with a second slit that communicates the first slit and the outside over the longitudinal direction thereof,
One surface of the inner surface of the mold part that defines the second slit has a locking protrusion that protrudes toward the other surface, and the locking protrusion is engaged with the other surface. Having a locking recess to stop,
The locking protrusion and the locking recess transition between a locked state and a released state when the mold portion is deformed so that the one surface and the other surface approach and separate.
The exterior member characterized by the above-mentioned.

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