JP5288905B2 - Method for water stop treatment of wire bundle and wire harness - Google Patents

Description

  The present invention relates to a water-stop treatment method for a bundle of wires (wire harness) routed in an automobile or the like, and the wire harness.

  2. Description of the Related Art Conventionally, for example, when a wire 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.

  As an example of a method for water-stopping treatment of such a part, a method of filling a gap between electric wires with a sealing material by filling a grommet with a resin sealing material and solidifying it is well known. However, this method requires a large-scale device for filling the sealing material, and it is difficult to work so that the sealing material does not flow down. In addition, it is confirmed whether the gap between the wires is completely sealed. There is a problem that can not be done.

  Therefore, as a means to solve this problem, before installing the grommet, wrap a butyl rubber sheet (water-stopping material) having viscoelasticity around the outer periphery of the electric wire in a state where a plurality of electric wires are wired on the wiring tool. There has been proposed a method of compressing in a radial direction with a jig or the like, embedding an electric wire in the butyl rubber, and filling butyl rubber between the electric wires. In this method, after filling the butyl rubber between the wires, the wire bundle can be inserted into the grommet, and the water stop treatment portion can be positioned at the wire harness penetration portion, so that the appearance of the butyl rubber can be obtained without the grommet. There is an advantage that can be visually confirmed.

  However, even with this water stop treatment method, there is a problem that it is difficult to confirm the filling state of butyl rubber in the wire bundle, and the filling state of butyl rubber between the wires tends to vary. In particular, when the number of wires is large and the wire bundle diameter is large, there is a problem that the butyl rubber is not sufficiently filled between the wires, and there is a high possibility that the water stoppage is lowered.

Thus, Patent Document 1 proposes a new water stop treatment method. In this water stop treatment method, as shown in FIG. 3A, first, a plurality of electric wires Wa are placed on the first butyl rubber sheet 101 at intervals. Next, the second-layer butyl rubber sheet 103 is placed on the electric wire Wa, and the plurality of electric wires Wa of the next layer are placed on the butyl rubber sheet 103 at intervals. A third-layer butyl rubber sheet 105 is placed on the electric wire Wa. When the prescribed number of wires Wa are alternately arranged with the butyl rubber sheets 101, 103, 105, the butyl rubber sheets 105, 103, 101 are pressurized from above the uppermost butyl rubber sheet 105 with a jig (not shown). As a result, the electric wires Wa are embedded in the butyl rubber sheets 101, 103, and 105, and at the same time, the butyl rubber is filled between the electric wires Wa without any gap. For example, when attaching to a grommet, finally, the form of a wire harness is obtained by rounding the butyl rubber sheets 101, 103, and 105 into a circular cross section according to the shape of the wire harness penetration part of the grommet.
Japanese Patent Laid-Open No. 11-7842

  By the way, in the still water treatment method described in Patent Document 1, since the butyl rubber sheets and the electric wires are alternately stacked and then pressurized together, the number of stages is different when the number of stages to be stacked is different. It is necessary to manage the pressure value every time it changes, and the work is troublesome. In addition, when pressure is applied in a lump after stacking, since a load is easily applied to the electric wire portion, there is a problem that pressurization to butyl rubber (water-stopping material) becomes insufficient and the filling property is lowered. In addition, it is conceivable to pressurize each time one layer of the butyl rubber sheet and the electric wire is stacked, but in such a case, there is a problem that it is difficult to fill because the previously pressurized electric wire exists below.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a water-stop treatment method for wire bundles and a wire harness that are easy to work and can improve the filling property of a water-stop material between wires. Is to provide.

In order to achieve the above-described object, the water stop treatment method according to the present invention is characterized by the following (1) to (2).
(1) A plurality of electric wire positioning pins standing at a predetermined pitch interval have viscoelasticity in a region sandwiched between the front and rear two rows of electric wire positioning pins in the upper surface of the lower plate formed in two rows. A placing step for placing the sheet-like first waterstop material;
In order to arrange a plurality of electric wires without intersecting on the upper surface of the first water stop material, one electric wire is provided between each of adjacent electric wire positioning pins in the plurality of electric wire positioning pins in the two front and rear rows. An arrangement step of arranging the plurality of electric wires to enter;
An upper plate preparation step of preparing an upper plate on which a sheet-like second waterstop material having viscoelasticity is placed;
The lower plate and the upper so that the plurality of electric wires arranged on the upper surface of the first water stop material in the arranging step are sandwiched between the first water stop material and the second water stop material. A pressure is applied to the lower plate and the upper plate so that the first water stop material and the second water stop material are pressed against the plurality of electric wires, thereby arranging the plurality of electric wires. A first pressurizing step for producing a sub-wire bundle having a water stop treatment part in which the first water stop material and the second water stop material are spread in the gap of
A stacking step of stacking so as to stack a plurality of water-stopping portions of the bundle of sub-wires produced by the first pressurizing step;
A second pressurizing step of filling a gap between the water stop processing portions of each of the plurality of sub electric wire bundles by applying a pressure in the stacked direction from the outside to the water stop processing portions stacked in the stacking step. When,
Having
(2) It is a water stop processing method of the composition of the above (1),
In the laminating step, the sub electric wires are stacked so that the water stop portions of the sub electric wire bundles are laminated on the electric wire bundle receiving jig that receives the sub electric wire bundles every time the sub electric wire bundles are sequentially dropped. Stacking bundles,
about.

According to the water stop treatment method having the above configuration (1), the water stop material is pressurized with the lower plate and the upper plate to produce a sub-wire bundle with water stop treatment. Can be filled. In addition, since the upper plate and the lower plate are pivotably connected in the vertical direction by a hinge, sheet-like water-stopping materials are placed on both upper surfaces of the opened upper plate and lower plate, By closing the upper plate after arranging the electric wires on the water-stopping material, the electric wire can be sandwiched between the two sheet-like water-stopping materials. The water material can be pressurized. Therefore, the work can be facilitated. Furthermore, pressurize the water-stopping material for each sub-wire bundle and create a water-stop treatment section. After stacking the water-stop treatment sections, pressurize the whole to integrate the water-stop treatment sections of each sub-wire bundle. Therefore, it is possible to sufficiently fill the gap between the wires with the water-stopping material at the stage of individually producing the sub-wire bundle with the water-stopping treatment section, and pressurize the water-stopping material in a lump as before. Unlike the case where pressure is applied each time the electric wire and the water stop material are alternately stacked, the electric wire does not hinder the filling of the water stop material. Moreover, since pressurization can be performed under the same conditions for each sub-wire bundle, the trouble of pressurization management can be reduced.
In addition, according to the water stop treatment method of (2) above, after the water stop treatment of the sub-wire bundle, simply remove the water stop treatment part from the upper plate and the lower plate and drop it into the inside of the tower. Since the water stop treatment sections can be stacked on the tool, the water stop treatment sections can be stacked at the same position, so that the work efficiency can be improved and the quality can be stabilized. Moreover, the trouble of stacking work can be reduced.

In order to achieve the above-described object, the wire harness according to the present invention is characterized by the following (3).
(3) The electric wire bundle provided with the electric wire bundle that has been water-stopped by the water-stop treatment method for the electric wire bundle described in (1) or (2) above and that the water-stopping material has spread across the gaps between the plurality of electric wires.

  According to the water-stop treatment method and the wire harness of the present invention, the work including the pressure control can be easily performed, and the filling property of the water-stop material between the electric wires can be increased. Improvement can be achieved.

  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.

  1 (a) to 1 (e) are process diagrams showing a part of the procedure of a water stop treatment jig and a water stop treatment method using the same according to the embodiment, and FIG. 2 is a water stop treatment apparatus and a water stop using the same. It is process drawing which shows a part procedure of a processing method.

  First, in carrying out this water stop treatment method, the water stop treatment jig 10 shown in FIG. 1 and the water stop treatment apparatus M shown in FIG. 2A including the water stop treatment jig 10 are used. .

  As shown in FIG. 2 (a), this water stop treatment device M is a sub-wire bundle W1 in which water stop treatment is applied to gaps between wires of a plurality of wires (hereinafter, water stop treatment on a plurality of wires is performed. The applied part may be referred to as a water-stop treatment part.) A water-stop treatment jig 10 capable of producing a water-stop treatment jig 10 and a gate-shaped tower that can drop a sub-wire bundle W1 with a water-stop treatment part inside. 30 and a Y-shaped wire bundle receiving jig 40 that is disposed inside the gate-shaped tower 30 and receives the dropped sub-wire bundle W1. The water-stopping jig 10 is detachably placed so as to hang over a jig receiving part 32 on the upper part of the pair of support columns 31 of the gate-shaped tower 30, and between the pair of jig receiving parts 32. In addition, an opening 33 is secured for dropping the manufactured sub-wire bundle W1 with the water-stopping treatment section.

  As shown in FIG. 1, the water stop processing jig 10 includes a lower plate 11 in which a necessary number of electric wire positioning pins 14 are erected in a comb shape, and an upper plate 12 that can be stacked on the lower plate 11. The electric wire positioning pins 14 are arranged in two rows at equal intervals in the longitudinal direction of the electric wire Wa to be routed on the lower plate 11. Preferably, the plurality of electric wire positioning pins 14 in each of the front and rear rows are erected so as to face each other in the front-rear direction. Further, the upper plate 12 and the lower plate 11 are placed on the upper plate 12 with respect to the lower plate 11 so that the upper surface of the lower plate 11 and one surface of the upper plate 12 face each other by a hinge 13 provided at one end of each plate. The upper plate 12 is pivotable relative to the lower plate 11 when the lower plate 11 is placed on the jig receiving portion 32 of the gate-shaped tower 30. It is comprised so that it may become.

Next, the procedure of the water stop treatment method will be described.
First, as shown in FIGS. 1 (a) and 1 (b), the upper plate 12 is opened, and viscoelastic sheet-like water-stopping materials 20 are placed on both upper surfaces of the upper plate 12 and the lower plate 11 one by one. Put it on. An example of the water blocking material 20 is butyl rubber. As the water blocking material 20, a viscoelastic material such as butyl rubber may be used, or a material having viscoelasticity in part may be used. On the lower plate 11, a water blocking material 20 is placed in a region sandwiched between two rows before and after the electric wire positioning pins 14 are erected. On the upper plate 12, the lower plate 11 when the upper plate 12 is rotated. The water-stopping material 20 is placed at a position facing the water-stopping material placed on the water.

  Next, as shown in FIG. 2A, the lower plate 11 of the water stop processing jig 10 is placed on the jig receiving portion 32 on the upper part of the gate-shaped tower 30. Then, on the gate-shaped tower 30, as shown in FIG. 1 (c), while positioning with the electric wire positioning pins 14 on the sheet-like water blocking material 20 on the lower plate 11, in each of the two front and rear rows A plurality of electric wires Wa are arranged at intervals from each other so that one electric wire Wa is arranged between one adjacent electric wire positioning pins 14.

  Next, as shown in FIG. 1 (d) and FIG. 2 (a), the electric wires arranged on the water stop material 20 of the lower plate 11 by rotating the upper plate 12 together with the sheet-like water stop material 20. A water blocking material 20 placed on the upper plate 12 is placed on Wa. In this state, by applying a tightening force from above the upper plate 12 and pressurizing the water stop material 20, the electric wire Wa is embedded in the water stop material 20 and the water stop material 20 is filled between the electric wires Wa. Let Thereby, sufficient pressurizing force can be transmitted to the water stop material 20, and the water stop material 20 can be filled in a sufficiently stable state between the electric wires Wa.

  By carrying out like this, the sub electric wire bundle W1 with the water stop process part 21 can be produced. Thereafter, as shown in FIG. 1 (e), the upper plate 12 is opened, the lower plate 11 is removed, and the water stop treatment portion 21 of the sub wire bundle W 1 is removed from the water stop treatment jig 10. Then, the removed sub electric wire bundle W1 is dropped into the gate-shaped tower 30 and the dropped sub electric wire bundle W1 is received by the electric wire bundle receiving jig 40 as shown in FIG.

  By repeating the above operation, a plurality of sub-wire bundles W1 with a water stop treatment unit are produced. And the water stop processing part 21 formed in this sub electric wire bundle W1 is piled up, receiving the sub electric wire bundle W1 with these water stop processing parts with the electric wire bundle receiving jig 40. FIG. That is, every time the sub electric wire bundle W1 with a water stop treatment part is produced, the sub electric wire bundle W1 with the water stop treatment part is dropped into the gate-shaped tower 30, and the sub electric wire bundle W1 that has been sequentially dropped is dropped. The still water treatment unit 21 is stacked.

  Then, as shown in FIG. 2 (b), when the water stop treatment portions 21 of the predetermined number of sub-wire bundles W1 are stacked, the water stop treatment portion 21 is further added by a press in the direction in which the water stop treatment portions are stacked. By pressing, the water stop process part 21 of each sub electric wire bundle W1 is integrated. Thereby, the water stop process of a wire bundle is completed and the wire harness W with a water stop process part is completed. After that, when attaching to the grommet, the water stop treatment part is appropriately formed according to the shape of the water stop part of the grommet and attached to the grommet to complete the water stop structure. When the grommet is mounted, the water-stopping treatment unit 21 is inserted into the grommet without pressing the stacked water-stopping treatment unit 21 with a press machine, and the stoppage is caused by the elastic force acting in the inner diameter direction of the grommet. The structure which pressurizes the water treatment part 21 may be sufficient. In this configuration, the grommet also serves as a pressing mechanism.

  As described above, according to the water stop treatment method and the water stop treatment apparatus, the water stop treatment part 21 is produced by pressurizing the water stop material 20 for each sub wire bundle W1, and the water stop treatment part. After stacking 21, the whole is further pressurized to integrate the water stop processing part 21 of each sub electric wire bundle W 1, so in the stage of producing the sub electric wire bundle W 1 with the water stop processing part individually, The water-stopping material 20 can be sufficiently filled between the electric wires Wa, and when the water-stopping material is pressurized all at once or when the electric wire and the water-stopping material are alternately stacked, as in the past. On the other hand, the electric wires do not interfere with the filling of the water stop material. Moreover, since pressurization can be performed under the same conditions for each sub-wire bundle W1, the trouble of pressurization management can be reduced.

  In addition, each time a sub-wire bundle W1 with a water stop treatment part is manufactured on the gate-shaped tower 30, and the manufactured sub-wire bundle is dropped into the gate-shaped tower 30, the sub-wires are sequentially dropped. Since the water stop treatment sections 21 of the bundle W1 are stacked, the water stop treatment sections 21 can be stacked at the same position, so that the work efficiency can be improved and the quality can be stabilized.

  Further, each time a sub-wire bundle W1 with a water stop treatment part is produced by the water stop treatment jig 10 arranged on the gate-like tower 30 and is produced, the produced one is put inside the gate-like tower 40. Since it is dropped and received by the wire bundle receiving jig 40, the water stop processing portions 21 of the sub wire bundles W1 can be stacked in an orderly manner when received by the wire bundle receiving jig 40. , It takes less work.

  Moreover, since the water stop material 20 is pressurized by the water stop processing jig 10 having the lower plate 11 and the upper plate 12 to produce the sub wire bundle W1 with the water stop treatment, the water stop material 20 is sufficiently connected between the wires Wa. Can be filled. Further, after the water stop treatment of the sub wire bundle W1, the water stop treatment portion 21 is removed from the water stop treatment jig 10 and dropped into the gate-shaped tower 30 to stop the sub wire bundle W1 on the wire bundle receiving jig 40. Since the water treatment units 21 can be stacked, the trouble of stacking work can be reduced.

  Further, since the upper plate 12 and the lower plate 11 of the water stop processing jig 10 are connected to each other by a hinge 13 so as to be rotatable in the vertical direction, the upper plate 12 and the lower plate 11 in the opened state are sheet-like on both upper surfaces. The water blocking material 20 is placed on the lower plate 11 and the electric wires Wa are arranged on the lower plate 11, and then the upper plate 12 is closed so that the electric wire is interposed between the two sheet-shaped water blocking materials 20. Since Wa can be sandwiched, the water-stopping material 20 can be pressurized by applying a load to the upper plate 12 in this state, and the work can be facilitated.

  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)-(e) is process drawing which shows a partial procedure of the water stop processing jig of embodiment of this invention, and the water stop processing method using the same. It is process drawing which shows a partial procedure of the water stop processing apparatus and the water stop processing method using the same. It is explanatory drawing of the conventional water stop processing method, (a) is a state which only piled up, (b) is sectional drawing which each shows the state pressurized after the stacking.

Explanation of symbols

W Wire harness W1 Sub wire bundle Wa Electric wire M Water stop treatment device 10 Water stop treatment jig 11 Lower plate 12 Upper plate 13 Hinge 14 Electric wire positioning pin 20 Sheet-like water stop material 21 Water stop treatment portion 30 Gate-shaped tower 32 Jig receiving part 40 Electric wire bundle receiving jig

Claims (3)

A sheet-like sheet having viscoelasticity in a region sandwiched between the two front and rear electric wire positioning pins in the upper surface of the lower plate in which a plurality of electric wire positioning pins erected at a predetermined pitch interval is formed in two front and rear rows. A placing step for placing the first water stop material;
In order to arrange a plurality of electric wires without intersecting on the upper surface of the first water stop material, one electric wire is provided between each of adjacent electric wire positioning pins in the plurality of electric wire positioning pins in the two front and rear rows. An arrangement step of arranging the plurality of electric wires to enter;
An upper plate preparation step of preparing an upper plate on which a sheet-like second waterstop material having viscoelasticity is placed;
The lower plate and the upper so that the plurality of electric wires arranged on the upper surface of the first water stop material in the arranging step are sandwiched between the first water stop material and the second water stop material. A pressure is applied to the lower plate and the upper plate so that the first water stop material and the second water stop material are pressed against the plurality of electric wires, thereby arranging the plurality of electric wires. A first pressurizing step for producing a sub-wire bundle having a water stop treatment part in which the first water stop material and the second water stop material are spread in the gap of
A stacking step of stacking so as to stack a plurality of water-stopping portions of the bundle of sub-wires produced by the first pressurizing step;
A second pressurizing step of filling a gap between the water stop processing portions of each of the plurality of sub electric wire bundles by applying a pressure in the stacked direction from the outside to the water stop processing portions stacked in the stacking step. When,
A water-stopping method for a wire bundle, characterized by comprising: In the laminating step, the sub electric wires are stacked so that the water stop portions of the sub electric wire bundles are laminated on the electric wire bundle receiving jig that receives the sub electric wire bundles every time the sub electric wire bundles are sequentially dropped. Stacking bundles,
The water stop processing method of the wire bundle according to claim 1.   A wire harness comprising the wire bundle that has been water-stopped by the water-stop treatment method for an electric wire bundle according to claim 1, and wherein the water-stopping material has spread across the gaps between the plurality of electric wires.

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