JPH09306246A - Method and device for waterproofing wire bundle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate and ensure the waterproofing of a large number of wire bundles and enable the use quantity of a sealing agent to be reduced by impregnating a water resistance resin into the wire bundles and winding a non-water permeable sheet. SOLUTION: When a wire bundle B is set at a wire bundle stages 2 and 2' and moved in a direction in which both stages 2 and 2' are made close, the wire bundle B widens in a planar shape. With the wire bundle B expanded, a water resistance resin 5d is blown out to the wire bundle B from a resin supply part 5. At this time, the water resistance resin 5d is blown out to a non-water permeable sheet 7 pinched by a sheet pinch parts 1c and 1c'. Then, both stages 2 and 2' are moved in an away direction, the wire bundle B is collected. With the resin 5d impregnated to the inside of the wire bundle B, a sheet winding arm accompanied with a sheet stage 4 is rotationally moved and the wire bundle B collected from one end of the non-water permeable sheet 7 is wound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof technique for a wire bundle that connects an electric device in a non-waterproof area and an electric device in a waterproof area to each other at the boundary between the areas.

[0002]

2. Description of the Related Art It is not possible to connect electrical equipment in a non-waterproof area and electrical equipment in a waterproof area, such as inside and outside a building, or inside a vehicle and an engine room, by a bundle of electric wires. Often done. At this time, various proposals have been made to prevent water from penetrating through the gaps between the electric wire bundles and impairing the waterproof structure. As an example, JP-A-6-351
The technique indicated by No. 133 will be described with reference to FIG. As shown in FIG. 19 (a), this wire bundle α
A tube γ having a sealant supply port β therein is arranged such that the supply port β is located at the waterproof portion δ, and a fluid sealant ε is supplied from the tube γ to the wire bundle α.
To form a waterproof structure. However, in reality, as shown in FIG. 19B, the sealing material ε flows between the bundles in the lengthwise direction so that the waterproof structure is not formed, and the waterproof structure is formed. Therefore, a large amount of sealant is required, which is a waste. It should be noted that such a drawback was remarkable especially when trying to waterproof a wire bundle composed of a very large number of wires.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art and can easily and reliably waterproof a wire bundle composed of a very large number of wires and uses a sealant. An object of the present invention is to provide a method for waterproofing a bundle of electric wires that has a small amount.

[0004]

In order to solve the above-mentioned problems, the method for waterproofing a wire bundle according to the present invention comprises, as described in claim 1, impregnating the expanded wire bundle with a waterproof resin, It has a configuration in which a bundle of electric wires is bundled and then a water-impermeable sheet coated with the waterproof resin is wound around the bundle.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the step of expanding the electric wire bundle, that is, the step of expanding the electric wire bundle in a plane is required. This reduces the thickness of the wire bundle and increases the surface area as a bundle,
Moreover, since the gap between the electric wires can be widened, the inside of the electric wire bundle can be easily impregnated with the resin, and thus a completely waterproof structure can be obtained. By this development, good results can be obtained especially in the case of an electric wire bundle composed of a large number of electric wires of several tens or more. In order to deploy the electric wire bundle in this way, it is possible to adopt a method of arranging the electric wires one by one in a plane or several electric wires. If the gripping is performed and these gripping portions are brought close to each other or one of the gripping portions or the angle of at least one of the gripping portions is changed to expand the wire bundle,
It is very easy and efficient because it can be done quickly. According to the latter two methods, it is possible to easily perform waterproofing on an already bundled electric wire bundle, and at the same time, to bundle electric wires after resin impregnation. After impregnating the resin, it is necessary to bundle the wire bundle. Due to this focusing, air bubbles slightly remaining between the electric wires are squeezed out to the outside, so that a reliable waterproof structure can be obtained.

Further, the waterproof resin (hereinafter also referred to as "resin" or "adhesive") has fluidity such that it can easily enter the gap formed by a plurality of electric wires, and is relatively It is preferable to select one having a low viscosity.Specifically, it is desirable that the viscosity is 100 cP or more and 1500 cP or less.If it is less than 100 cP, the fluidity is too high and the fluid flows out without staying in the wire bundle. If it is more than 1500 cP, it will be difficult to penetrate into the wire bundle, and it will be difficult to obtain sufficient waterproof property, and if the viscosity is in the range of 500 cP or more and 1000 cP or less, optimum results will be obtained.

Further, it is necessary to select, as the above-mentioned resin, a resin which has good adhesiveness to the resin forming the coating layer of the electric wire and has water resistance and airtightness when cured. Here, if it is water-curable, it is easy to handle, and if it is left in the air, it absorbs the moisture and hardens,
No special treatment such as heating required with thermosetting resin is required, so there is no risk of adversely affecting the coating of electric wires, and there are obstacles such as deterioration in waterproofness due to bubbles generated by solvent volatilization type resin. Does not happen. Impregnation of such resin,
It is necessary to unfold the wire bundle as described above. It is preferable to impregnate the developed wire bundle with resin from both sides, since the reliability of waterproofing can be enhanced, and especially when the number of wires forming the wire bundle is very large. In order to impregnate from both sides like this,
For example, after applying one side of the expanded wire bundle, it is possible to take a means such as rotating the wire bundle a half turn and applying again, but it takes time and the viscosity is low as described above. When a resin is used, the resin is likely to be wasted due to washout. In order to prevent this, for example, a resin is applied in advance on a water-impermeable sheet, which will be described in detail later, by contacting one surface of the expanded electric wire bundle with the expanded electric wire. It is preferable to apply the resin again from the other surface of the bundle by means of dropping or the like because it can be easily carried out, the number of steps is reduced, and the waste resin is reduced.

For the purpose of the present invention, the sheet used for winding must be impermeable to water. If this sheet is a sheet made of isoprene rubber, the sheet layers formed when this sheet is wound are intimately adhered to each other due to the self-adhesiveness of the isoprene rubber itself and are very solid. The waterproof structure eliminates the need to apply an adhesive between the sheets. Also,
Even when inserting the grommet into the waterproof part where the isoprene rubber sheet is wrapped, either insert a slightly tighter grommet or / and from the top of the contact part between the grommet and the sheet after inserting the grommet. By taping, a complete waterproof structure without an adhesive is created, so a waterproof structure is formed not only between wires and wires and between wires and sheets, but also between sheets and between sheets and grommets. A waterproof structure can be easily obtained.

The water-impermeable sheet is required to be wrapped around the wire bundle after being coated with resin. The applied resin enters the resin-deficient portion slightly generated on the outer surface of the bundle of electric wires bundled after the impregnation, and ensures the waterproof between the electric wire bundle and the sheet. This application needs to be applied only to the place where the wire bundle impregnated with the resin (the waterproof part) is directly contacted, and the application to the part where the sheets contact each other after winding is carried out by the isoprene rubber. It is unnecessary due to the above properties.

Resins suitable for use in the present invention, that is, having a high impregnation property into the wire bundle and having a low viscosity, generally have a low tackiness. Therefore, when the non-water-permeable sheet is wrapped around the bundle of electric wires after being impregnated, in particular, when the machine is wrapped by an automated device or the like, the sheet is slipped between the electric wire during the winding, and the sheet is idly wound. Poor attachment is likely to occur.
Here, if an adhesive is applied to a part of the sheet, the electric wire and the sheet can be temporarily fixed by the adhesive force, and the above defects can be prevented. Note that if the adhesive is applied entirely to the water-impermeable sheet, the formation of a waterproof structure between the sheets due to the integration of the isoprene rubber sheet itself may be hindered, so it is necessary to study it in advance. There is.

In the present invention, when the water-impermeable sheet is wound around the wire bundle by applying tension, the waterproof performance becomes more reliable and the space between the wires forming the wire bundle becomes narrower. Therefore, the amount of adhesive required is reduced, which is economical. However, if the tension is too high, wrinkles may occur between the sheets and the waterproof structure may become incomplete, so
It is desirable to adjust so that the tension does not exceed a certain level. The amount of sheet winding is about two turns. If it is less than one and a half turns, it is easy to unwind, but two turns are enough. It is uneconomical because the effect does not change even if it winds over two laps.

[0012]

【Example】

[Electric wire bundle waterproofing apparatus A] The apparatus shown as A in FIG. 1 is an example of the electric wire bundle waterproofing apparatus according to the present invention. In the figure, reference numeral 1 is a rotating portion, and the wire bundle stages 2 and 2 ′ and the wire bundle holders 3 and 3 ′ are arranged on the left and right sides of the rotating portion 1.
Therefore, the stages 2 and 2'can move in the x direction, the y direction in the drawing, or directions opposite to these directions, and the wire bundle holders 3 and 3'can move in the y direction or the opposite direction.

FIG. 2 (a) shows a model view of each mechanism of the wire bundle waterproofing apparatus A shown in FIG. 1 when viewed from the right side as viewed from the front. The rotating part 1 is adapted to rotate counterclockwise in this figure. The rotating portion 1 has a sheet gripping base portion 1a having a mechanism for gripping a water impermeable sheet, to which sheet tension adjusting mechanisms 1b and 1b 'for adjusting the sheet tension by a spring are attached. Further, on the sheet gripping base 1a, the sheet gripping portions 1c, 1c 'and the sheet cutting blade 1d are provided.
There is. These rotate together with the rotation of the rotating unit 1.

Reference numeral 2 in the drawing denotes an electric wire bundle stage, to which an electric wire bundle gripping portion 2a and a spread width adjusting pin 2b are attached. Further, reference numeral 3 is a wire bundle retainer. As described above, this device has the wire bundle stage 2 ′ and the wire bundle retainer 3 ′, and the stage 2 ′ also has the wire bundle gripping portion 2a ′ and the expansion width adjusting pin 2b ′ like the stage 2. These operate in the same way as the stage 2, the wire bundle holder 3, the wire bundle gripping portion 2a, and the expansion width adjusting pin 2b, respectively, but operate symmetrically when viewed from the front of the device, so the description of the operation is omitted in principle below. .

Reference numeral 4 is a seat stage. A sheet winding arm 4a, which is a mechanism for winding a film around a bundle of electric wires, is attached to the sheet stage 4. The seat stage 4 can be retracted downward, and even if the rotating unit 1 rotates during the retract, it does not hinder the rotation. Reference numeral 5 is a resin supply unit, which is capable of discharging a fixed amount of resin. Since the resin used in this embodiment is a water-curable resin, the tip of the nozzle portion 5a of the resin supply portion 5 is protected by the hydrophobic nozzle protection liquid 5b (here, liquid paraffin). The resin supply unit 5 can be moved to the vicinity of the seat stage 4 by a resin supply unit drive mechanism (not shown).

A non-water permeable sheet 7 (isoprene rubber sheet) is wound around the sheet reel 6. As shown in FIG. 2B, an adhesive 7a is applied to a part of one side of the sheet 7, and since the sheet 7 has self-adhesiveness, it is wound around the sheet reel 6 together with the protective film 8. . The protective film 8 fed out as the water-impermeable sheet 7 is used is wound around the protective film take-up reel 9. In FIG. 2A, the end portion of the sheet 7 is already set on the sheet stage 4.

A method of waterproofing a bundle of electric wires using such a device will be described with reference to FIGS. First,
The wire bundle B is set on the wire bundle stage 2 as shown in FIG. A model perspective view of the state of the electric wire bundle B at this time is shown in FIG. In addition, the water impermeable sheet 7
Is gripped by the sheet gripping portions 1c and 1c ', and is cut by the sheet cutting blade 1d while leaving only a necessary amount. On the other hand, the resin supply unit 5 moves to the vicinity of the stage 4 for the sheet, and then moves in the left-right direction of the drawing as shown by the arrow, and the waterproof resin is placed on the impermeable sheet 7 set on the stage 4. Discharge 5d. In the present embodiment, the Konishi Bond Silex 100, which is a moisture-curable so-called silicone RTV, is used.
(Viscosity: 700 cP, curing time: 72 hours at room temperature) was used. After the waterproof resin 5d is applied to the sheet 7 in this way, the resin supply unit 5 returns to its original position as shown in FIG. 4A, and the nozzle unit 5a becomes the nozzle protection liquid 5b again. It is dipped and protected.

Next, the wire bundle B is gripped by the wire bundle gripping portions 2a and 2a 'as shown in FIG. 4B (perspective model view). Next, wire bundle stage 2 (and 2 ')
Move toward each other as indicated by the arrow in FIG. 5 (b). As a result, the wire bundle B expands as shown in the figure. The width of the expansion is regulated by the expansion width adjusting pins 2b and 2b '. In this state, the wire bundle holders 3 and 3 ′ come down from almost above and hold down the wire bundle B, so that the wire bundle is developed in a plane shape. If the expansion of the electric wire bundle B is incomplete in this step, the impregnation of the resin into the electric wire bundle B is likely to be incomplete, and a waterproof structure may not be obtained. Therefore, the number of electric wires in the electric wire bundle B, Adjust the conditions according to the wire bundle thickness, etc.

The electric wire bundle B thus developed is shown in FIG.
As indicated by the middle arrow, it moves in the direction of the rotating unit 1. FIG. 6 shows a side view (model diagram) of the vicinity of the rotating part when moved.
At this time, it is necessary to make the center of the wire bundle B near the rotation axis of the rotating unit 1.

Next, as shown by the arrow in FIG. 6, the sheet stage 4 moves up and the water-impermeable sheet placed on the stage 4 and the resin layer formed thereon are spread as described above. It is pressed against B from below. At this time, since the resin having a specific viscosity is used as described above, the resin permeates from below the electric wire bundle B into the electric wire bundle, and the electric wire bundle B is impregnated with the resin.

Further, the resin supply unit 5 is moved again to the vicinity of the sheet stage 4 by the function of a resin supply unit drive mechanism (not shown), and the resin is supplied onto the expanded wire bundle B. Cross-sectional view (model diagram) near stage 4 at this time
Is shown in FIG. The resin supply unit 5 moves on the wire bundle B while moving in the left-right direction of the drawing as shown by the arrow in FIG.
Discharge d. This resin 5d permeates between the wires from above the wire bundle B (see FIG. 8). That is, in this step, the resin 5d is impregnated into the inside of the wire bundle B from above. Next, the wire bundle stage 2 (and 2 ') is shown in FIG.
Move away from each other as indicated by the arrows.
As a result, the wire bundle B is focused as shown in the figure. At this time, the bubbles remaining in the wire bundle B are squeezed out to the outside. A cross-sectional view (model diagram) near the stage 4 at this time is shown in FIG.

Then, as shown in FIG. 10, the sheet winding arm 4a attached to the sheet stage 4 is rotated to wind one end of the impermeable sheet 7 around the electric wire bundle B. At this time, the resin with which the wire bundle B is impregnated has almost no adhesiveness because of its low viscosity, but the water-impermeable sheet 7 is temporarily fixed to the wire bundle B by the adhesive 7a applied as described above. To be done.

As shown in FIG. 11, the sheet winding arm 4
When a is restored, the seat stage 4 is retracted downward. Next, the rotating unit 1 rotates in the direction indicated by the arrow in FIG. 12, and the water impermeable sheet 7 is wound around the wire bundle B. The tension applied to the seat at this time is adjusted by the seat tension adjusting mechanisms 1b and 1b '. After one rotation, the rotation of the rotating unit 1 is completed (see FIG. 13), and the sheet gripping unit 1
c, 1c 'are opened. Next, as shown by the arrow in FIG. 14 (a), the wire bundle stages 2 and 2'are moved to the front side of the apparatus (left side in the drawing) to hold the wire bundle gripping portions 2a and 2a '.
The grip of the electric wire bundle B by is released. When this wire bundle is removed from the wire bundle gripping portions 2a and 2b, the end of the impermeable sheet 7 is wound around the wire bundle B, and all winding steps are completed (see FIG. 14 (b)).

Since the waterproof resin 5d, which is then immersed between the bundles of electric wires B, is water-curable as described above, this resin is hardened by the moisture in the air. In this curing process, bubbles are not generated, and the wire bundle and the waterproof between the wire bundle and the water impermeable sheet can be obtained. On the other hand, the non-permeable sheet layers are also integrated due to the self-adhesiveness of the butyl rubber sheet, resulting in a completely waterproof structure.

Furthermore, by setting a tight grommet on the butyl rubber sheet wrapped around the waterproof part, the butyl rubber sheet and the grommet are integrated, so that, for example, the inside of the grommet is filled with resin or the like. A good waterproof structure is formed without using other waterproofing means.

In the above example, the sheet stage 4, the resin supply unit 5 and the like form a sheet winding mechanism, and the wire bundle stages 2 and 2'and the wire bundle gripping units 2a and 2a 'form a developing mechanism and a focusing mechanism. The rotating unit 1 and the sheet gripping base 1a
The sheet tension adjusting mechanisms 1b and 1b ′, the sheet gripping portions 1c and 1c ′, and the like constitute a sheet winding mechanism.

[Waterproofing device A'between electric wires] In the waterproofing device A'between electric wires, a non-water-permeable sheet partially coated with an adhesive is used to prevent idle rotation of the sheet during winding. are doing. However, when the electric wire bundle is impregnated with a resin having an extremely low viscosity, the resin on the surface of the electric wire bundle may invalidate the temporary fixing of the sheet to the electric wire bundle by the adhesive agent, resulting in idle rotation. Here, an example of a gap reduction mechanism for surely preventing such idling will be described with reference to the drawings.

FIG. 15A is a cross-sectional model view of the vicinity of the sheet stage 4 of the wire bundle waterproofing apparatus A'in which the gap reducing mechanism is attached to the wire bundle waterproofing apparatus A as seen from the right side of the apparatus. . The state shown in this figure is the state immediately before the step shown in FIG. 10 is completed and the step shown in FIG. 11 is started (before the seat stage is retracted downward) in the above. On the sheet stage 4, there is a water-impermeable sheet 7 (isoprene rubber sheet) having self-adhesiveness. The water-impermeable sheet 7 is converged after resin is impregnated in the waterproofing required portion. There is a bundle of electric wires B. The water-impermeable sheet 7 wraps around the waterproofing required portion of the electric wire bundle, and one end 7b thereof is folded back onto the water-impermeable sheet 7.

At this time, if the gap between the overlapping sheets or the gap between the sheets and the waterproofing-required portion of the electric wire bundle is large, idle rotation occurs during winding and winding is possible. If it is not present or if the wound sheet is wrinkled, as a result, the waterproof performance is deteriorated, or the grommet cannot be inserted, resulting in a failure of a defective product. Therefore, to reduce these gaps,
The gap reduction mechanism functions as follows. That is, FIG.
As shown in (b), the gap reducing block 10 descends from near the folded-back end portion 7b of the sheet 7 and stops slightly above the sheet 7 (about 3 mm in this embodiment). The gap reducing block 10 is made of aluminum, and a polytetrafluoroethylene plate 10a is attached to the surface facing the electric wire bundle B.

Next, the gap reducing block 10 is shown in FIG.
5 (c) is moved in the direction of the arrow and pressed against the electric wire bundle B with the sheet 7 sandwiched therebetween. When the sheet 7 has wrinkles due to the movement of the gap reducing block 10, the sheet 7 hits the polytetrafluoroethylene plate 10a to eliminate the wrinkles, whereby the gap formed between the sheets 7 is reduced, and the sheet 7 and the wire bundle are also reduced. The gap formed with B is also reduced.
The length of the gap reducing block 10 in the width direction of the sheet 7 is longer than the width of the sheet 7. Therefore, the above effect can be obtained in the entire overlapped portion of the sheet 7. Sheet 7
Is a sheet made of isoprene rubber and has a tack in this embodiment, but since there is a polytetrafluoroethylene plate 10a on the side of the wire bundle of the gap reducing block 10, it is not affected by this tack. The sheet 7 can be handled.

When the gap reducing block 10 reaches the electric wire bundle B as described above, the gap reducing block 10 further descends as shown in FIG. 15 (d) to press the overlapping portion of the sheet 7 against the sheet stage 4. By this operation, the overlapping portions of the sheet 7 are self-adhered by the tack. Finally, the gap reducing block 10 is retracted and moved to a position where it does not hinder the operation of the sheet winding mechanism. The subsequent operation of the apparatus A ′ proceeds in the same manner as the steps of the apparatus A from FIG. 11 to FIG. The gap reducing mechanism having the gap reducing block 10 reduces the gap between the overlapping portions of the sheet 7 and the gap between the sheet 7 and the electric wire bundle, and the winding is performed by the rotation of the rotating unit 1 in the subsequent step. There is no idling in attachment (see FIG. 12), no wrinkling occurs in the seat at that time, and finally, extremely good waterproofness can be obtained with good yield.

[Method of Deploying Electric Wire Bundle: Alternative Method 1] When deploying the electric wire bundle, the electric wire bundle developing mechanism of the inter-electric wire bundle waterproofing apparatus A may not be sufficiently impregnated with resin. That is, when the number of electric wires constituting the electric wire bundle is very large, both side portions of the waterproofing required portion of the electric wire bundle are grasped and the grasped portions are brought close to each other or one grasped portion to the other grasped portion. Even if the bundle is expanded, the expansion of the electric wire bundle may not be sufficient, and a large number of electric wires may locally collect.
The impregnation of the resin in such a place is likely to be incomplete, so that the waterproof performance becomes uncertain.

Such anxiety can be resolved as follows. That is, as shown in FIG. 16 (a), both side portions of the waterproofing-required portion of the wire bundle are gripped, and when these gripping portions are brought close to each other or one of the other gripping portions, a planar shape is obtained. The expansion portion of the electric wire bundle is pressed against the sheet stage 4 (see (1) and (2) in FIG. 16B) to promote the expansion of the electric wire bundle. Note that even in this state, if a large number of electric wires are locally gathered, pressing the expansion assist bar 12 from above (see (c) (1) and (2) in FIG. 16) cancels the local concentration. can do. At this time, it is more effective to press the expansion assisting bar 12 while vibrating or reciprocating it (note that the water impermeable sheet 7 is not shown in these figures).

[Expansion Method of Wire Bundle: Alternative Method 2] As an application of the above Alternative Method 1, the wire bundle B of FIG. 17A is shown in FIG.
As shown in FIG. 7 (b), both side portions of the wire bundle to be waterproofed are grasped, and these grasping portions are expanded with each other, or one of them is brought close to the other grasping portion, and the angles of both grasping portions are adjusted. By changing the plane wire bundle stage 4 which is changing or raising the wire bundle gripping portion, the wire bundle stage 4 is relatively raised and the wire bundle expanded as shown in FIG. 17C. By pressing down, the local concentration of the wire bundle can be released, and the resin can be completely impregnated between the wires (the water-impermeable sheet 7 is not shown in these figures).

[Expansion Method of Electric Wire Bundle: Alternative Method 3]
For example, as shown in FIG. 18, the wire bundle may be expanded by gripping both sides of the waterproofing required portion of the wire bundle and changing the angle of the gripping portion. In this case, since the wire bundle is developed in a flat shape only by changing the angle, there is no need for means for pressing the wire bundle to keep it in a flat shape.

[0036]

According to the method of waterproofing a wire bundle according to the present invention, it is possible to easily and completely waterproof a wire bundle composed of a large number of wires. is there. On the other hand, the wire bundle waterproofing apparatus according to the present invention is
Despite its simple structure, reliable waterproofing can be performed quickly. According to such a device, waterproofing can be easily performed even on a bundle of electric wires that have already been bundled (for example, a wire harness of an automobile before inspection after completion of assembly), so that the range of use is wide.

[Brief description of drawings]

FIG. 1 is a diagram showing an example A of an electric wire bundle waterproofing device according to the present invention.

2 (a) is a model diagram showing a side surface of the apparatus A. FIG. (B) is a perspective view showing a state of a sheet reel of a water impermeable sheet of the apparatus A.

FIG. 3 (a) is a model diagram showing a state in which a wire bundle is set and resin is applied onto a sheet. It is a model perspective view which shows the state of the electric wire bundle in (b) and (a).

FIG. 4 (a) is a model diagram showing a state when a wire bundle is gripped. It is a model perspective view which shows the state of the electric wire bundle in (b) and (a).

FIG. 5 (a) is a model diagram showing a state when the electric wire bundle is expanded. It is a model perspective view which shows the state of the electric wire bundle in (b) and (a).

FIG. 6 is a model diagram showing a state when the wire bundle stage is moved to the rotating unit side.

FIG. 7 is a model diagram showing a step of impregnating a resin from above the electric wire bundle.

FIG. 8 is a model diagram showing a state after resin impregnation.

FIG. 9 (a) is a model diagram showing a state in which a wire bundle after resin impregnation is collected. It is a model perspective view which shows the state of the electric wire bundle in (b) and (a).

FIG. 10 is a model diagram showing the movement of the sheet winding arm.

FIG. 11 is a model diagram showing a state in which the seat stage is retracted downward.

FIG. 12 is a model diagram showing a state during sheet winding.

FIG. 13 is a model diagram showing a state after completion of sheet winding.

FIG. 14A is a model diagram showing a state immediately before the waterproofing of the electric wire bundle is completed. It is a model perspective view which shows the state of the electric wire bundle in (b) and (a).

FIG. 15 is a model diagram for explaining the operation of the gap reduction mechanism. (A) It is a model figure which shows the state folded back so that an electric wire bundle may be wrapped with a water impermeable sheet. (B) It is a model figure which shows the state which the block for gap reduction fell. (C) A model diagram showing a state in which the gap reducing block has moved until it comes into contact with the electric wire bundle. (D) It is a figure which shows the state which the block for gap reduction further descended, and pressed the overlapping water-impermeable sheet on the stage for sheets.

FIG. 16 is a diagram showing another example (alternate method 1) of the method for expanding the electric wire bundle according to the present invention. (A) A model diagram showing a state before deployment (a diagram viewed from above the device). (B) A model diagram showing a state in the middle of deployment ((1) and (2) are diagrams as seen from above and from the front of the device, respectively). (C) A model diagram showing the state at the end of deployment ((1) and (2) are diagrams as seen from above and from the front of the device, respectively).

FIG. 17 is a diagram showing another example (alternative method 2) of the method for expanding the electric wire bundle according to the present invention. (A) It is a model view (perspective view) showing a state before deployment. (B) A model diagram (perspective view) showing a state in the middle of deployment. (C) It is a model diagram (perspective view) showing a state at the end of deployment.

FIG. 18 is a diagram showing another example (Alternative method 3) of the method of deploying the wire bundle according to the present invention.

FIG. 19 (a) is a diagram showing a waterproofing method for an electric wire bundle according to a conventional technique. (B) It is a model figure which shows the fault of (a).

[Explanation of symbols]

 A Example of waterproofing device between electric wire bundles according to the present invention B Electric wire bundle 1 Rotating portion 1a Sheet gripping base portion 1b, 1b 'Sheet tension adjusting mechanism 1c, 1c' Sheet gripping portion 1d Sheet cutting blade 2, 2'For electric wire bundle Stage 2a, 2a 'Wire bundle gripping portion 2b, 2b' Deployment width adjusting pin 3, 3'Wire bundle holder 4 Sheet stage 4a Sheet winding arm 5 Resin supply portion 5a Resin nozzle 5b Nozzle protection liquid 5d Waterproof resin 6 sheet Reel 7 Water-impermeable sheet 7a Adhesive 8 Protective film 9 Protective film take-up reel 10 Gap reduction block 10a Polytetrafluoroethylene plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Tsubaki 252 Kawashimada, Gotemba, Shizuoka Prefecture Yazaki Parts Co., Ltd.

Claims (20)

[Claims] 1. An electric wire bundle characterized by impregnating a developed electric wire bundle with a waterproof resin, collecting the electric wire bundle, and then winding a water-impermeable sheet coated with the waterproof resin on the bundle. Waterproofing method. 2. The waterproofing method for an electric wire bundle according to claim 1, wherein a waterproof resin is impregnated into both surfaces of the expanded electric wire bundle. 3. The method for waterproofing a wire bundle according to claim 1, wherein tension is applied when the water-impermeable sheet is wound around the wire bundle. 4. The method for waterproofing an electric wire bundle according to claim 1, wherein the water-impermeable sheet is made of isoprene rubber. 5. The waterproofing method for an electric wire bundle according to claim 1, wherein an adhesive is applied to at least a part of the water-impermeable sheet. 6. A non-water-permeable sheet is folded at the time of winding the sheet to wrap around the waterproof portion of the electric wire bundle, and a gap is formed between the overlapping sheets and between the sheet and the waterproof portion of the electric wire bundle. The method for waterproofing an electric wire bundle according to claim 1, wherein the water-impermeable sheet is wound after the gap is reduced. 7. A step of unfolding the wire bundle by gripping both sides of a waterproofing required portion of the wire bundle and bringing these gripping parts close to each other or one gripping part to the other gripping part The method for waterproofing an electric wire bundle according to any one of claims 1 to 6. 8. An electric wire bundle is unfolded by gripping both sides of a waterproofing required portion of the wire bundle, and bringing these gripping parts close to each other or one gripping part to the other gripping part. The method for waterproofing a bundle of electric wires according to claim 7, further comprising a step of pressing the vicinity of the expanded portion so as to be flat. 9. A wire bundle is spread on a plate-like object by gripping both sides of a waterproofing required portion of the wire bundle and bringing these gripping parts close to each other or one gripping part to the other gripping part,
The waterproofing method for the electric wire bundle according to claim 7, further comprising a step of changing an angle of gripping of both gripping parts while pressing a developed portion on the plate-shaped object. 10. The wire bundle is developed by gripping both sides of a waterproofing required portion of the wire bundle and changing the angle of at least one of the gripping portions. 7. The waterproofing method for the electric wire bundle according to any one of 6 above. 11. The waterproofing method for an electric wire bundle according to claim 1, wherein the waterproofing resin is water-curable. 12. The waterproofing method for an electric wire bundle according to claim 1, wherein a viscosity of the waterproofing resin before curing is 100 cP or more and 1500 cP or less. 13. A resin impregnation mechanism for impregnating a developed electric wire bundle with a waterproof resin, a converging mechanism for converging the electric wire bundle,
A sheet winding mechanism for winding a water-impermeable sheet coated with a waterproof resin around an electric wire bundle. 14. The inter-wire bundle waterproofing device according to claim 13, wherein the sheet winding mechanism includes a tension adjusting mechanism that applies tension to the sheet when the sheet is wound around the electric wire bundle. 15. A non-water-permeable sheet is wrapped around a portion of a wire bundle requiring waterproofing when the sheet is wound, and is folded, and a gap is formed between the overlapping sheets and between the sheet and the portion of the wire bundle requiring waterproofing. The inter-wire bundle waterproofing device according to claim 13 or 14, further comprising a gap reducing mechanism for reducing the gap. 16. An electric wire bundle unfolding mechanism for expanding the electric wire bundle by gripping both sides of a waterproofing required portion of the electric wire bundle and bringing at least one of the gripping portions close to the other gripping portion. The wire bundle waterproofing device according to any one of claims 13 to 15. 17. The wire bundle waterproofing device according to claim 16, wherein the wire bundle expanding mechanism has a mechanism for expanding the wire bundle while pressing the wire bundle onto a flat surface. 18. The wire bundle unfolding mechanism comprises a mechanism for changing the angle of the wire bundle gripping portion while pushing the unfolded portion against the plate-like object after the wire bundle is unfolded. The electric wire bundle waterproofing device described in. 19. The wire bundle is developed by gripping both sides of a waterproofing required portion of the wire bundle and changing the angle of at least one of the gripping portions. The waterproofing apparatus for wire bundles according to any one of 1. 20. A waterproof structure for an electric wire bundle, wherein a sheet made of butyl rubber is arranged directly between the electric wire bundle filled with a waterproof resin between the wires and the grommet.