JP2009289606A - Method of water stop processing of electric wire, apparatus of water stop processing of electric wire, and wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of water stop processing of an electric wire, which reliably seals a gap between electric wires, can show high water stop performance and can efficiently perform water stop processing of an electric wire bundle such as a wire harness, to provide an apparatus of water stop processing for performing the method, and to provide the wire harness including an electric wire bundle subjected to water stop processing by the apparatus of water stop processing. <P>SOLUTION: A basket-shaped portion 10, having a bird cage shape and including voids therein, is formed in the electric wire bundle WH by loosening each of a plurality of electric wires W composing the electric wire bundle WH to the outside in a radial direction of the electric wire bundle WH, a solid water stop material S is inserted into the void, and thereafter, by heating the water stop material S in the basket-shaped portion 10 to melt while converging the loosened portions of the plurality of electric wires W of the basket-shaped portion 10, the water stop material S is disposed between the converged electric wires W. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric wire water stop treatment method, an electric wire water stop treatment device used for carrying out the method, and a wire harness subjected to a water stop treatment by the electric wire water stop treatment device.

  For example, when a wiring harness is routed through a panel that partitions an engine room and a vehicle interior of an automobile, a grommet is attached to a portion where the wire harness penetrates the panel. This grommet seals the gap between the panel and the wire harness by fitting into the mounting hole of the panel, and a water-stop treatment is usually applied to the wire harness penetration part of the grommet.

  Patent Document 1 describes an example of this water stop treatment method. 3A to 3E are process explanatory views showing a conventional water-stop treatment method for a wire harness. FIG. 4 is a cross-sectional view showing a state where the wire harness is attached to the grommet. In the water stop treatment method of Patent Document 1, first, as shown in FIG. 3 (a), a wire bundle WH obtained by bundling wires W to be a wire harness is brazed into a wiring state on a vehicle. The water part forming jig 500 is supported. The water stop part forming jig 500 includes a plurality of support parts 501 erected on the water stop part forming jig 500 in order to support the wire bundle WH. Next, in the water-stop treatment method of Patent Document 1, as shown in FIG. 3B, a water-stop material is applied to the surface of the wire bundle WH in a state where the wire bundle WH is supported by the support portion 501. The non-solidified water-stopping material S is applied by the nozzle 505. Then, in the water stop processing method of patent document 1, as shown in FIG.3 (c), the part which apply | coated the water stop material S of the wire bundle WH is wrapped with the water stop sheet | seat 510. FIG.

  Next, in the water stop processing method of Patent Document 1, the wire bundle WH is removed from the support portion 501, the water stop sheet 510 is wound up, and the wire bundle WH is bound into a circular cross-section wire bundle. Furthermore, in the water stop processing method of Patent Document 1, as shown in FIGS. 3D and 3E, tape 512 is wound around both ends of the water stop sheet 510, and the cross-sectional shape of the wire bundle WH is shown in FIG. The grommet 600 is shaped into a cross-sectional shape that can be inserted into the wire harness penetration portion 602 of the grommet 600 shown in FIG. This completes the water stop structure. Reference numeral 601 denotes a grommet panel fitting portion.

Moreover, there exists the method of inject | pouring a water stop material in the state which passed the wire bundle through the grommet as another water stop processing method. That is, in that method, the wire bundle is inserted in advance through the wire harness penetration part of the grommet, and the gap between the grommet and the wire harness or the wire harness is filled by filling the inside of the wire harness penetration part in that state. Stops the gap between the wires that make up.
Japanese Patent Laying-Open No. 2005-71790 (FIGS. 4 and 5)

  By the way, in the conventional method shown to Fig.3 (a)-(e), since the water stop material S is apply | coated from the outside and the part is only wound up with the water stop sheet 510, the water stop material S is used. The fine gaps existing between the electric wires W are not sufficiently spread, so that the water stop treatment may be insufficient. Further, as shown in FIG. 4, there is a similar possibility in the case of the method of filling the water stop material after inserting the wire bundle through the grommet. Therefore, in the conventional wire harness manufacturing method, a wire harness that may not be sufficiently water-stopped can be manufactured. Therefore, a test for confirming the water-stop state of the wire harness must be performed, and the wire harness is manufactured. There was a problem that efficiency decreased.

  This invention is made | formed in view of the situation mentioned above, The objective can seal the space | interval between electric wires reliably and can exhibit high water stop performance, and it is efficient for electric wire bundles, such as a wire harness. Wire water stop treatment method capable of performing water stop treatment, wire water stop treatment device used for carrying out the method, and wire provided with a bundle of wires subjected to water stop treatment by the wire water stop treatment device To provide a harness.

In order to achieve the above-described object, the wire water stop treatment method according to the present invention is characterized by the following (1) to (3).
(1) A cage-shaped portion forming step of forming a bird cage-like cage-shaped portion having a cavity inside in the wire bundle by loosening a plurality of wires constituting the wire bundle outward in the radial direction of the wire bundle. When,
A solid water-stopping material insertion step of inserting a solid water-stopping material into the cavity inside the cage-shaped portion;
After the solid water blocking material insertion step, the loosened portions of the plurality of electric wires of the cage-shaped portion are converged, and the water-stopping material inside the cage-shaped portion is heated and melted to converge. A convergent heating step of interposing the water stop material between the wires;
Having
(2) In the wire water stop treatment method of (1) above,
In the basket-shaped portion forming step, the portions positioned on both sides in the length direction of the wire bundle are gripped with respect to the portion of the wire bundle scheduled to form the cage-shaped portion, and the gripped portions are the wire bundle. By moving in the direction of approaching each other along the length direction, the portions of the plurality of electric wires constituting the cage-shaped portion are respectively loosened outwardly in the radial direction of the wire bundle, thereby forming the cage-shaped portion. To do.
(3) In the electric wire water stoppage treatment method of (1) above,
In the basket-shaped portion forming step, the portions located on both sides in the length direction of the wire bundle are gripped with respect to the portions of the wire bundle that are to form the cage-shaped portion, and then the gripped portions are The wire bundle is twisted while the gripped portions are brought close to each other by rotating relative to each other in the opposite directions around the axis of the portion, and subsequently, the interval between the gripped portions is kept as it is. On the other hand, by returning the twist of the wire bundle, the portions of the plurality of electric wires constituting the cage-shaped portion are respectively loosened outward in the radial direction of the wire bundle to form the cage-shaped portion.

According to the wire water stop treatment method of (1) above, a solid water stop material is inserted into the cage-shaped portion formed in the wire bundle, and then the slack portion is converged and the solid water stop The material is heated to melt. Then, since the melted water-stopping material reaches the gaps between the plurality of electric wires while being pressed against the pressure of each electric wire to be converged, the water-stopping material can be reliably interposed in the gaps between the wires. Therefore, the gap between the electric wires can be reliably sealed, and high water stopping performance can be exhibited. Therefore, it is possible to omit the water stop test after the water stop treatment, the water stop treatment can be efficiently performed on the wire bundle provided in the wire harness or the like, and the manufacturing efficiency of the wire bundle can be improved. . Further, since the water-stopping material is inserted into the cavity inside the cage-shaped portion in a solid form, heating can be performed in a state where the water-stopping material is held in the cage-shaped portion of the wire bundle. It is easy to handle and improves workability.
According to the wire waterproofing method of (2) above, both sides of the wire bundle are gripped and moved in the direction in which the both sides in the length direction of the wire bundle approach each other with respect to the portion where the cage-shaped portion is to be formed. Thus, the cage-shaped portion is formed. In this way, a cage-shaped portion having a cavity inside the wire bundle can be created by a simple operation without requiring a jig or the like for adjusting the outer shape of the cage-shaped portion. Can be easily arranged at the center of the wire bundle.
According to the wire waterproofing method of (3) above, by gripping the portions located on both sides in the length direction of the wire bundle with respect to the portion where the cage-shaped portion is to be formed, and turning the gripped portion, A cage-shaped portion is formed by twisting the wire bundle and then returning the twist. If it carries out like this, the internal stress by the operation | movement twisted to each of several electric wires will arise, and an electric wire bundle can be slackened when each electric wire deform | transforms in a substantially equal direction. For this reason, it is possible to create a naturally shaped cavity inside the bundle of electric wires with a simple operation without the need for a separate jig or the like for adjusting the outer shape of the cage-shaped part, and a solid water-stopping material Can be easily arranged at the center of the wire bundle.

Moreover, in order to achieve the objective mentioned above, the electric wire water stop processing apparatus which concerns on this invention is characterized by the following (4).
(4) A bird cage-like cage-shaped portion having a cavity for inserting a solid water-stopping material therein by loosening a plurality of wires constituting the wire bundle outward in the radial direction of the wire bundle. A cage-shaped part forming device for forming a wire bundle on the wire bundle;
In the cage-shaped portion, the solid water-stopping material is pulled in opposite directions relative to the cage-shaped portion disposed in the cavity in the opposite direction. A converging device for converging slack portions of the plurality of electric wires;
A heating device that heats and melts the solid water-stopping material disposed in the cavity of the cage-shaped portion;
Having

In the water stop treatment device having the configuration of (4) above, a cage shape portion is formed on the wire bundle using a cage shape portion forming device, and a solid water stop material is inserted into the inside of the cage shape portion. The slack portion is converged by the converging device, and the solid water-stopping material is heated and melted using the heating device. According to such a configuration, the molten water-stopping material is spread over the gaps between the plurality of electric wires while being pressed against the pressure of each electric wire to be converged, so that the water-stopping material is surely inserted into the gaps between the electric wires. Can be interposed. Therefore, the gap between the electric wires can be reliably sealed, and high water stopping performance can be exhibited. Therefore, it is possible to omit the water stop test after the water stop treatment, the water stop treatment can be efficiently performed on the wire bundle provided in the wire harness or the like, and the manufacturing efficiency of the wire bundle can be improved. . Further, since the water-stopping material is inserted into the cavity inside the cage-shaped portion in a solid form, heating can be performed in a state where the water-stopping material is held in the cage-shaped portion of the wire bundle. It is easy to handle and improves workability.
The wire waterproofing device grips portions located on both sides in the length direction of the wire bundle with respect to a portion where the cage-shaped portion is to be formed by a movable clamp mechanism or the like, and the mechanism is moved in the length direction of the wire bundle. It is preferable to make it the structure which moves to the direction which mutually approaches along. In this way, the cage-shaped portion is formed by the above mechanism, so that there is no need for a jig or the like for adjusting the outer shape of the cage-shaped portion. And a solid water stop material can be easily placed at the center of the wire bundle.
The wire waterproofing device grips both sides of the wire bundle with a mechanism such as a movable clamp mechanism on portions located on both sides in the length direction of the wire bundle with respect to a portion where the cage-shaped portion is to be formed. It is preferable that the cage-shaped portion is formed by twisting the wire bundle by relative rotation and then rotating the wire bundle in the opposite direction to return the twist of the wire bundle. In this way, it is possible to create a naturally shaped cavity inside the wire bundle without the need for a jig or the like for adjusting the outer shape of the cage-shaped portion in order to form the cage-shaped portion, A solid water stop material can be easily disposed at the center of the wire bundle.

In order to achieve the above-described object, the wire harness according to the present invention is characterized by the following (5).
(5) The water stop material cured after being melted by the electric wire water treatment apparatus according to (4) includes an electric wire bundle interposed between the plurality of electric wires.

  According to the wire harness having the above configuration (5), the gap between the electric wires is reliably sealed in the water stop treatment portion, and high water stop performance can be exhibited. Therefore, it is possible to omit the water stop treatment and the water stop test after manufacture, and it is possible to provide a wire harness that is improved in manufacturing efficiency.

  ADVANTAGE OF THE INVENTION According to this invention, the clearance gap between the electric wires in a water stop process part can be sealed reliably, and high water stop performance can be exhibited. Therefore, it is possible to omit the water stop test after the water stop treatment, and to improve the efficiency of the water stop treatment of the wire bundle and to improve the production efficiency of the wire harness including the wire bundle subjected to the water stop treatment. Can do.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

<First Embodiment>
Drawing 1 (a)-(c) is an outline perspective view for explaining a 1st embodiment of an electric wire water stop processing method and an electric wire water stop processing device concerning the present invention.

The wire waterproofing apparatus of this embodiment performs a waterproofing process on the wire bundle WH provided in a wire harness or the like. As shown in FIG. 1A, the wire bundle WH is configured by bundling a plurality of wires W. Hereinafter, in the description of the embodiment, an example in which water stopping treatment is performed on the wire bundle WH provided in the wire harness will be described. However, the wire bundle WH in the present invention is not limited to the wire harness, and other water stopping treatment is performed. It can be applied to a bundle of electric wires.
As shown in FIG.1 (b), an electric wire water stop processing apparatus loosens the some electric wire W which comprises the electric wire bundle WH to the radial direction outer side of the electric wire bundle WH, respectively, and is a solid water-stop material inside. By pulling both ends of the wire bundle WH in which a plurality of wires W are slackened, and the wire bundle WH, the cage-shaped portion forming device for forming the bird-shaped cage-shaped portion 10 having a cavity for inserting S And a convergence device for converging to the original state. Further, the wire water stop treatment device has a heating device 30 that heats and melts the solid water stop material S inserted into the cavity inside the cage-shaped portion 10. The configuration of the heating device 30 is not particularly limited as long as it can supply the amount of heat necessary for melting the solid water-stopping material S. For example, a device that blows warm air like a hair dryer is used. It can be adopted.

  As the solid water-stopping material S, a solid state is maintained at the time of insertion, and a heat-meltable water-stopping material is used. Note that the solid state includes a state in which a part thereof is non-solid as long as it does not fall from the cage shape portion 10 when inserted into the cage shape portion 10. The heat-meltable water-stopping material S is solidified (cured) again at room temperature after converging the wire bundle WH. In addition, the shape of the water blocking material S when solid is not particularly limited, and can be inserted from the gap between the electric wires W of the cage-shaped portion 10 and held in the cavity of the cage-shaped portion 10. As long as it is within the range, it can be changed as appropriate.

  In the present embodiment, a pair of portions that are positioned on both sides in the length direction of the wire bundle WH with respect to a portion that is to form the cage-shaped portion 10 and that is relatively movable in the length direction of the wire bundle WH. Movable clamp mechanisms 21 and 22 are provided. Moreover, in order to adjust the space | interval in the length direction of the wire bundle WH of a pair of movable clamp mechanisms 21 and 22, at least one movable clamp mechanism 21 and 22 is moved in parallel with respect to the length direction of the wire bundle WH. A linear movement mechanism 25 is provided. Further, a control device 26 that controls the movement of the linear movement mechanism 25 is provided. When forming the cage-shaped portion 10, the control device 26 controls the linear movement mechanism 25 so as to move in a direction approaching each other along the length direction of the wire bundle WH of the pair of movable clamp mechanisms 21 and 22. The positions of the pair of movable clamps 21 and 22 are adjusted. When the control device 26 converges the electric wire W, the control device 26 controls the linear movement mechanism 25 to move in a direction away from each other along the length direction of the electric wire bundle WH of the pair of movable clamp mechanisms 21 and 22. The positions of the clamp mechanisms 21 and 22 are adjusted. In the present embodiment, the pair of movable clamp mechanisms 21 and 22, the linear movement mechanism 25, and the control device 26 constitute a cage-shaped part forming device and a convergence device. The configuration of the pair of movable clamp mechanisms 21 and 22 can be changed as appropriate. For example, a pair of clamp mechanisms in which one is a movable side clamp and the other is a fixed side clamp. It is only necessary that the clamp can be controlled to move relative to the other fixed-side clamp.

Next, the wire water stop processing method for the wire bundle of the wire harness performed using the wire water stop processing apparatus having the above configuration will be described.
Generally, when assembling a wire harness, for example, an operator attaches a plurality of electric wires on a predetermined assembly work table while referring to a design drawing or the like, and routes them in a predetermined shape. Further, for example, the worker assembles parts such as a protector, a resin tube, or a clip at a predetermined portion of the electric wire, or wraps a tape to form a wire harness having a predetermined shape.

The procedure of the water stop processing method which performs further a water stop process with respect to the wire bundle of this wire harness is demonstrated below.
First, a wire bundle WH as shown in FIG. 1 (a) is prepared, and then, as shown in FIG. 1 (b), a plurality of wires W constituting the wire bundle WH are respectively radially outward of the wire bundle WH. By slackening, a bird cage-like cage-shaped portion 10 having a cavity inside is formed (cage-shaped portion forming step).

  At this time, in the present embodiment, first, the wire bundle WH is gripped by the movable clamp mechanisms 21 and 22, respectively, at portions located on both sides in the length direction of the wire bundle with respect to the portion where the cage-shaped portion 10 is to be formed. To do. Then, the gripping movable clamp mechanisms 21 and 22 are moved in a direction (arrow F1 direction) approaching each other along the length direction of the wire bundle WH by driving the linear movement mechanism 25. Then, the plurality of electric wires W constituting the electric wire bundle WH are each loosened outward in the radial direction of the electric wire bundle WH, thereby forming the bird cage-like cage-shaped portion 10 having a cavity inside. At this time, by using the movable clamp mechanisms 21 and 22 and the linear movement mechanism 25, a jig or the like for adjusting the outer shape of the cage-shaped portion 10 to form the cage-shaped portion 10 is not required. A cage-shaped portion having a cavity inside the wire bundle WH can be created by a simple operation.

  Next, the solid water-stopping material S is inserted into the cavity inside the cage-shaped portion 10 (solid water-stopping material insertion step). Thereafter, by driving the linear movement mechanism 25, the movable clamp mechanisms 21 and 22 on both sides are moved in the opposite direction (arrow F2 direction), and the distance in the length direction of the wire bundle WH of both the movable clamp mechanisms 21 and 22 is reached. The positions of the pair of movable clamp mechanisms 21 and 22 are adjusted so that the distance increases. By carrying out like this, tension | pulling force is applied to each of the some electric wire W linearly, and the some electric wire W is converged by making each electric wire closely_contact | adhere. At the same time, the solid water-stopping material S inserted in the cavity inside the cage-shaped portion 10 is heated and melted by the heating device 30 to spread the water-stopping material S in the gaps between the converged electric wires W. (Convergence heating process). Then, since the melted water-stopping material S reaches the gaps between the plurality of electric wires W while being pressed against the pressure of each electric wire W to be converged, the water-stopping material S is reliably interposed in the gaps between the wires W. be able to. This wire bundle WH is inserted into the grommet in the same manner as shown in FIG. 4, and the water stop treatment portion SH of the wire bundle WH is crimped by the grommet, so that the water stop structure between the grommet and the wire bundle is obtained. Can be realized.

  According to the wire water stop treatment method of this embodiment, the solid water stop material S is inserted into the cage-shaped portion 10 formed in the wire bundle WH, and then the slack portion is converged and the solid water stop material is converged. The water stop material S is heated and melted. Since the melted water-stopping material S reaches the gaps between the plurality of electric wires W while being pressed against the pressure of each electric wire W to be converged, the water-stopping material can be reliably interposed in the gaps between the wires W. . Therefore, the clearance gap between the electric wires W can be sealed reliably, and high water stop performance can be exhibited. For this reason, it is possible to omit the water stop test after the water stop treatment, the water stop treatment can be efficiently performed on the wire bundle WH provided in the wire harness or the like, and the production efficiency of the wire bundle WH can be improved. Can be improved. In addition, since the water-stopping material S is inserted into the cavity inside the cage-shaped portion in a solid form, heating can be performed while the water-stopping material S is held in the cage-shaped portion 10 of the wire bundle WH. The water-stopping material S can be easily handled and workability can be improved.

  In addition, as in the present embodiment, when the cage-shaped portion 10 is formed by gripping both sides of the wire bundle WH and moving the gripped portions toward each other along the length direction of the wire bundle WH Since it is not necessary to separately use a jig or the like for adjusting the outer shape of the cage-shaped portion and a cavity can be created inside the wire bundle WH with a simple operation, the solid waterstop material S can be easily formed into a wire bundle. It can be placed in the center of WH.

Second Embodiment
Drawing 2 (a)-(e) is a figure explaining a 2nd embodiment of an electric wire water stop processing method and an electric wire water stop processing device concerning the present invention. In the embodiments described below, members having the same configuration / action as those already described are denoted by the same or corresponding reference numerals in the drawings, and description thereof is simplified or omitted.

  Similar to the configuration of the first embodiment, the wire waterproofing device of the present embodiment loosens the plurality of wires W constituting the wire bundle WH to the outside in the radial direction of the wire bundle WH, thereby fixing the inside. By pulling the both ends of the cage-shaped portion forming device for forming the cage-shaped cage-shaped portion 10 having a cavity for inserting the shape water-stopping material S, and the wire bundle WH loosened from the plurality of wires W And a converging device for converging the wire bundle WH to the original state, and a heating device 30 for heating and melting the solid waterstop material S inserted in the cavity inside the cage-shaped portion 10. Yes. As the heating device 30, for example, a device that blows warm air like a hair dryer can be adopted.

  Moreover, the electric wire waterproofing processing apparatus of this embodiment hold | grips the electric wire bundle WH on both sides of the location in which the cage shape part formation apparatus and the convergence apparatus form the cage shape part 10 similarly to the structure of 1st Embodiment. At the same time, a pair of movable clamp mechanisms 21 and 22 that can be relatively moved in the length direction of the wire bundle WH and can be relatively rotated around the axis of the wire bundle WH, and the pair of movable clamp mechanisms 21 and 22. In order to adjust the distance in the length direction of the wire bundle WH, the linear movement mechanism 25 that moves at least one of the movable clamp mechanisms 21 and 22 in the length direction of the wire bundle WH, and the linear movement mechanism 25 are controlled. And a control device 26. The wire waterproofing apparatus of the present embodiment further includes a rotation mechanism 27 that relatively rotates the pair of movable clamp mechanisms 21 and 22.

  The rotating mechanism 27 has a portion positioned on both sides in the length direction of the wire bundle WH with respect to a portion to be formed with the cage-shaped portion 10 held by the pair of movable clamp mechanisms 21 and 22, and the axis of the portion is It is the structure which carries out relative rotation in the opposite direction mutually centering | focusing on the center.

Next, the control system in the electric wire water stop processing apparatus of this embodiment is demonstrated.
First, when forming the cage-shaped portion 10, the control device 26 controls the rotation mechanism 27 as shown in FIG. By twisting in the direction of arrow F3, the wire bundle WH is twisted. At the same time, the control device 26 controls the linear movement mechanism 25 to allow a change in the position of the pair of movable clamp mechanisms 21 and 22 in the length direction of the wire bundle WH accompanying the twisting of the wire bundle WH. Here, the rotation operation period of the rotation mechanism 27 and the position change operation period of the movable clamp mechanisms 21 and 22 may be executed in the same period, or each operation period is independent, for example, a part of the period May be executed so as to overlap. Then, as a second operation, as shown in FIG. 2C, the rotation mechanism 27 is controlled in a state where the position of the pair of movable clamp mechanisms 21 and 22 is fixed to the linear movement mechanism 25, and the pair of The movable clamp mechanisms 21 and 22 are rotated relative to each other in the direction of the arrow F4 opposite to the direction of the arrow F3 in FIG. Then, as shown in FIG. 2 (d), the plurality of electric wires W constituting the electric wire bundle WH are loosened to the outside in the radial direction of the electric wire bundle WH, so that the bird cage-like cage-shaped portion 10 having a cavity inside is formed. Can be formed.

  Further, the control device 26 controls the linear movement mechanism 25 when converging the electric wire W, and the direction of the arrow F2 is set so that the distance in the length direction of the electric wire bundle WH of the pair of movable clamp mechanisms 21 and 22 is increased. The pair of movable clamp mechanisms 21 and 22 are controlled to move. And by pulling the part located in the length direction both sides of the wire bundle WH with respect to the cage-shaped portion 10 in which the solid water-stopping material S is disposed in the cavity, the wire bundle W is It can be converged to the original state.

Next, a procedure for applying a water stop treatment to the wire bundle using the wire water stop treatment apparatus having the above configuration will be described.
First, a wire bundle WH as shown in FIG. 2 (a) is prepared, and then, as shown in FIGS. 2 (b) to (d), a plurality of wires W constituting the wire bundle WH are respectively connected to the wire bundle WH. By slackening outward in the radial direction, a bird cage-like cage-shaped portion 10 having a cavity inside is formed (cage-shaped portion forming step).

  At this time, in the present embodiment, first, as shown in FIG. 2 (b), the portions located on both sides in the length direction of the wire bundle WH with respect to the portion where the cage-shaped portion 10 is to be formed are moved to the movable clamp mechanism 21. , 22. Then, the gripping movable clamp mechanisms 21 and 22 are first rotated relative to each other in the direction of the arrow F3 opposite to each other, so that the movable clamp mechanisms 21 and 22 on both sides are moved to each other by the arrow F1 while twisting the wire bundle WH. Move freely in the direction shown. Next, as shown in FIG. 2 (c), the distance between the movable clamp mechanisms 21 and 22 on both sides is kept unchanged, and the movable clamp mechanisms 21 and 22 are centered on the axis of the gripped portion. By turning in opposite directions (in the direction of arrow F4 in FIG. 2C), the wire bundle WH is untwisted. Then, as shown in FIG. 2 (d), the plurality of electric wires W constituting the electric wire bundle WH are loosened outward in the radial direction of the electric wire bundle WH, and the bird cage-like cage-shaped portion 10 having a cavity inside is formed. It is formed (cage shape portion forming step).

  Next, the solid water-stopping material S is inserted into the cavity inside the cage-shaped portion 10 (solid water-stopping material insertion step). Thereafter, as shown in FIG. 2 (e), by driving the linear movement mechanism 25, the movable clamp mechanisms 21 and 22 on both sides are moved in the opposite direction (arrow F2 direction), and both the movable clamp mechanisms 21 and 22 are moved. The position of the pair of movable clamp mechanisms 21 and 22 is adjusted so that the distance in the length direction of the electric wire bundle WH becomes larger, and the solid waterstop material S is arranged in the cavity with respect to the cage-shaped portion 10. The plurality of electric wires W are converged by pulling the portions located on both sides in the length direction of the wire bundle WH relatively in opposite directions. At the same time, the solid water-stopping material S inserted in the cavity inside the cage-shaped portion 10 is heated and melted by the heating device 30, so that the water-stopping material S is distributed in the gaps between the converged electric wires W. (Convergence heating process). Thereby, the wire harness which has the water stop process part SH is completed. This wire bundle WH is inserted into the grommet in the same manner as shown in FIG. 4, and the water stop treatment portion SH of the wire bundle WH is crimped by the grommet, so that the water stop structure between the grommet and the wire bundle is obtained. Can be realized.

  According to the wire water stop treatment apparatus and the wire water stop treatment method of the present embodiment, the portion positioned on both sides in the length direction of the wire bundle WH is gripped and gripped with respect to the portion where the cage-shaped portion 10 is to be formed. By turning the portion, the wire bundle WH is once twisted, and then the twist is returned to form the cage-shaped portion 10. If it carries out like this, the internal stress by the operation | movement twisted to each of the some electric wire W will arise, and the electric wire bundle WH can be slackened when each electric wire deform | transforms in a substantially equal direction. For this reason, it is possible to create a naturally shaped cavity inside the wire bundle WH by a simple operation without requiring a separate jig or the like for adjusting the outer shape of the cage-shaped portion 10, thereby The water material S can be easily arranged at the center of the wire bundle.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

(A)-(c) is explanatory drawing of 1st Embodiment of the water stop processing method and water stop processing apparatus concerning this invention, Comprising: It is a schematic perspective view for demonstrating each process of water stop processing. . (A)-(e) is explanatory drawing of 2nd Embodiment of the water stop processing method and water stop processing apparatus concerning this invention, Comprising: It is a front view for demonstrating each process of water stop processing. (A)-(e) is process explanatory drawing of the water stop processing method of the conventional wire harness. It is sectional drawing which shows the state which mounted | wore the grommet with the wire harness processed by the water stop processing method of FIG.

Explanation of symbols

W Electric wire WH Electric wire bundle S Water stop material 10 Basket-shaped parts 21, 22 Movable clamp mechanism 25 Linear movement mechanism 26 Controller 27 Rotation mechanism

Claims (5)

A cage-shaped portion forming step of forming a bird cage-like cage-shaped portion having a cavity inside the wire bundle by slackening a plurality of wires constituting the wire bundle to the outside in the radial direction of the wire bundle, and
A solid water-stopping material insertion step of inserting a solid water-stopping material into the cavity inside the cage-shaped portion;
After the solid water blocking material insertion step, the loosened portions of the plurality of electric wires of the cage-shaped portion are converged, and the water-stopping material inside the cage-shaped portion is heated and melted to converge. A convergent heating step of interposing the water stop material between the wires;
An electric wire water-stop treatment method characterized by comprising:   In the basket-shaped portion forming step, the portions positioned on both sides in the length direction of the wire bundle are gripped with respect to the portion of the wire bundle scheduled to form the cage-shaped portion, and the gripped portions are the wire bundle. By moving in the direction of approaching each other along the length direction, the portions of the plurality of electric wires constituting the cage-shaped portion are respectively loosened outwardly in the radial direction of the wire bundle, thereby forming the cage-shaped portion. The wire water stop treatment method according to claim 1, wherein:   In the basket-shaped portion forming step, the portions located on both sides in the length direction of the wire bundle are gripped with respect to the portions of the wire bundle that are to form the cage-shaped portion, and then the gripped portions are The wire bundle is twisted while the gripped portions are brought close to each other by rotating relative to each other in the opposite directions around the axis of the portion, and subsequently, the interval between the gripped portions is kept as it is. While the twist of the electric wire bundle is returned, the portion of the plurality of electric wires constituting the cage-shaped portion is loosened outwardly in the radial direction of the electric wire bundle to form the cage-shaped portion. The wire water stop processing method according to claim 1. A plurality of electric wires constituting the electric wire bundle are respectively loosened outward in the radial direction of the electric wire bundle, whereby the bird cage-like cage-shaped portion having a cavity for inserting a solid water-stopping material therein is provided as the electric wire. A basket-shaped part forming device to be formed into a bundle;
In the cage-shaped portion, the solid water-stopping material is pulled in opposite directions relative to the cage-shaped portion disposed in the cavity in the opposite direction. A converging device for converging slack portions of the plurality of electric wires;
A heating device that heats and melts the solid water-stopping material disposed in the cavity of the cage-shaped portion;
An electric wire still water treatment apparatus characterized by comprising:   5. A wire harness comprising: a wire bundle in which the water stop material cured after being melted by the wire water stop treatment device according to claim 4 is interposed between the plurality of electric wires.

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