JP5074893B2 - Water stop member, wire harness having the water stop member, and water stop forming method using the water stop member - Google Patents

Description

  The present invention provides a water stop member that forms a water stop portion at a predetermined position of an electric wire bundle in which a plurality of covered electric wires are bundled, a wire harness including the water stop portion formed by the water stop member, and The present invention relates to a water stopping part forming method using a water stopping member. The “water stop” in the description of the present invention is not limited to preventing the entry of water, but means that it effectively acts on all liquids including water, oil, alcohol, etc. It will be explained using “stop water” widely used as the name.

  Conventionally, grommets have been used to wire a bundle of wires from the outside of an automobile to the inside of the room. The grommet 3 shown in FIG. 11 is fitted into a through hole 2a provided in the panel 2 that partitions the outside and the inside of the room, and allows the wire bundle 4 to pass through the through hole 2a while keeping the through hole 2a sealed. Is. The wire bundle 4 is configured by bundling a plurality of wires 41 each having a terminal attached to the terminal.

  The wire bundle 4 is formed with a water stop portion S1 at a position positioned in the grommet 3 of the wire bundle 4 because there is a possibility that the liquid transmitted between the wires 41 may enter the room due to a capillary phenomenon or the like. Is generally performed (see, for example, Patent Document 1). Moreover, the said wire harness 101 is comprised by the grommet 3 mentioned above, the electric wire bundle 4, and the water stop part S1.

The water stop portion S1 is formed by applying a semi-solid, liquid, or gel water stop material to the surface of the wire bundle 4, and winding the outer periphery of the wire bundle 4 with the sheet 102, thereby connecting the wires 41 to each other. The water stop material is infiltrated, and the sheet 102 and the wire bundle 4 are both fixed by the tape T1. And the electric wire bundle 4 in which the water stop part S1 was formed in this way passes through the grommet 3, and the location in which the water stop part S1 was formed is fixed in the grommet 3 by the tape T2 or the like.
JP 2005-129240 A

  In the conventional wire harness 101 described above, the wire bundle 4 is bent or twisted when transported to a vehicle assembly factory in a packaged state or assembled to a vehicle (as indicated by a dotted line in FIG. 11). As shown in the figure, there is a problem that a large external force is applied to the water-stopping portion S1 and the water-stopping material and the electric wire 41 may be peeled off. When the water-stopping material and the electric wire 41 are thus separated, a gap is generated in the water-stopping portion S1, so that there is a problem that the liquid transmitted between the electric wires 41 may enter the room.

  Therefore, the present invention provides a water stop member that can reliably stop water between wires, a wire harness in which a water stop portion is formed by the water stop member, and a water stop portion using the water stop member. An object is to provide a forming method.

In order to achieve the above object, the invention described in claim 1 is a water stop member that forms a water stop portion that stops water between the wires of a wire bundle, and includes a pair of box-like shapes having openings. A pair of cases, and an uncured gel-like water-stopping material injected into each of the pair of cases, and the pair of cases are disposed between each other in a direction in which the openings face each other. The wire bundle is sandwiched and fixed to the wire bundle, and the uncured water stop material penetrates between the wires and hardens to form the water stop portion, and the uncured water stop material is injected. The opening of the case is covered with a metal film, release paper, or plastic film, and the metal film, release paper, or plastic film is stored when the wire bundle is stopped. Removed and used A water-shutoff member, wherein.

According to a second aspect of the present invention, in the first aspect of the invention, the pair of cases are formed with an edge that contacts each other and shields the opening, and is recessed from the edge. A concave portion through which the wire bundle passes, and the concave portion of the case into which the uncured water-stopping material is injected is stored in a state covered with the metal film, the release paper, or the plastic film. It is characterized by.

The invention described in claim 3 is a tubular grommet attached to a through-hole provided in the panel, a wire bundle passed through the grommet, and a water stop portion that stops water between the wires of the wire bundle. And the water stop portion is formed by the water stop member according to claim 1 or 2 .

Invention of Claim 4 is the water stop part formation method which forms the water stop part which water-stopped between each electric wire of an electric wire bundle using the water stop member of Claim 1 or Claim 2, The step of peeling the metal film, the release paper or the plastic film from the case, and the pair of cases face each other with the openings facing each other, and the wire bundle between the pair of cases. A water-stopping member attaching step for sandwiching, and a water-stopping material hardening step for fixing the pair of cases to the wire bundle, while hardening the water-stopping material that has penetrated between the wires to stop the water between the wires. It is a water stop part formation method characterized by having sequentially.

According to the invention described in claim 1, the water-stop member is a pair of box-like cases having openings, and an uncured gel-like water-stop material injected into each of the pair of cases, The pair of cases sandwich the wire bundle between each other in a direction in which the openings face each other and are fixed to the wire bundle, and the uncured water stop material is interposed between the wires. Since the water stop part is formed by penetrating and curing, even if the bundle of wires is bent or twisted and a large external force is applied to the water stop part, the water stop material and the electric wire move so that they are mutually connected. Since it can prevent peeling, the water stop part which can prevent the penetration | invasion of a liquid reliably can be formed. Moreover, since the gel-like water stop material is applied to the wire bundle, the water stop material surely permeates between the wires. According to the invention described in claim 1, the opening of the case into which the uncured water-stopping material is injected is stored in a state of being covered with a metal film, a release paper, or a plastic film, And since the said metal film, the said release paper, or the said plastic film is peeled and used when water-stopping the said wire bundle, it can prevent that a foreign material mixes in a water stop material. Moreover, it can prevent that a water stop material absorbs moisture or oxidizes and deteriorates. Moreover, it can prevent that the volatile component in a water stop material evaporates. By these things, it can store in the state which poured the uncured water stop material in the case, and can transport this water stop member. Therefore, a water stop part can be formed in an electric wire bundle by using this component water stop member without using a water stop material applicator.

According to the invention described in claim 2, the pair of cases includes an edge portion that contacts each other and shields the opening portion, and a recessed portion that is formed as a recess from the edge portion and that passes the wire bundle. And the concave portion of the case into which the uncured waterproofing material is injected is stored in a state of being covered with the metal film, the release paper, or the plastic film. Can be prevented from leaking out.

According to the invention described in claim 3 , since the water stop portion is formed by the water stop member according to claim 1 or claim 2 , it is possible to reliably prevent liquid from entering. A wire harness having a water stop portion can be provided.

According to the water stop part forming method described in claim 4 , the water stop part that forms a water stop part that stops water between the wires of the wire bundle using the water stop member according to claim 1 or claim 2. A method of forming a portion, the step of peeling the metal film, the release paper or the plastic film from the case, and the pair of cases facing each other in a direction in which the openings face each other. A water stop member attaching step for sandwiching the wire bundle therebetween, the water stop material that has penetrated between the wires is cured to stop water between the wires, and the water stop member that fixes the pair of cases to the wire bundle. Since the material hardening step is sequentially included, the water stop portion that can reliably prevent the intrusion of liquid by the component water stop member without using the water stop material applicator can be easily integrated into the wire bundle. Can be formed That.

  Hereinafter, the wire harness which has the water stop member which concerns on the 1st Embodiment of this invention, and the water stop part formation method using the said water stop member are demonstrated using FIG. 1 thru | or FIG.

  FIG. 1 is a cross-sectional view showing a wire harness having a water stop member according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a case of the water stop member shown in FIG. 1. FIG. 3 is a plan view showing a state in which a water stop material is injected into the case of the water stop member shown in FIG. 1 and the opening of the case is covered with a plastic film. FIG. 4 is an explanatory view for explaining a water stop portion forming method using the water stop member shown in FIG. 1 and is a view showing the water stop member during storage. FIG. 5 is a view showing a state where the plastic film of the water-stopping member shown in FIG. 4 is peeled off. FIG. 6 is a view showing a state in which a pair of cases of the water blocking member shown in FIG. 5 are faced to each other. FIG. 7 is a diagram illustrating a state in which the wire bundle is sandwiched between the pair of cases of the water blocking member illustrated in FIG. 6 and the cases are fixed to each other. FIG. 8 is a view showing a state in which the water stop member and the electric wire bundle shown in FIG. 7 are both wound and fixed with tape. FIG. 9 is a diagram illustrating a state in which the wire bundle provided with the water stop portion illustrated in FIG. 8 is passed through the grommet.

  As shown in FIG. 1, the wire harness 1 includes a grommet 3 attached to a through-hole 2 a provided in a panel 2 that partitions the exterior and interior of an automobile, and an electric wire bundle 4 passed through the inside of the grommet 3. And the water stop part S which stopped between each electric wire 41 of this electric wire bundle 4 is provided. Moreover, the water stop part S stops the part located in the grommet 3 of the wire bundle 4.

  In the description of the present invention, “water-stop” means not only preventing the ingress of water but also effectively acting on all liquids including water, oil, alcohol, etc. It will be explained using “stop water” widely used as the name.

  The grommet 3 is made of an elastic material such as rubber, and as shown in FIG. 1, a cylindrical main body 30 formed so that the outer diameter gradually decreases from one end to the other end, and the main body. A cylindrical cylindrical portion 33 connected to the other end of the portion 30. Further, the one end of the main body 30 is referred to as a large-diameter portion and is denoted by reference numeral 31. Further, the other end of the main body 30 is referred to as a small diameter portion, and is denoted by reference numeral 32. In addition, a groove 34 that is recessed from the outer surface of the main body 30 toward the inside is provided on the outer periphery of the large diameter portion 31 over the entire circumference of the large diameter portion 31. Such a grommet 3 is attached to the through hole 2a so that the groove 34 is in close contact with the through hole 2a of the panel 2. The wire bundle 4 is routed from the outside of the automobile to the room by passing through the inside of the grommet 3.

  The wire bundle 4 is formed by bundling a plurality of wires 41 having terminals attached to both ends. The electric wire 41 is a covered electric wire in which the outer periphery of the core wire 42 is covered with an insulating coating 43 (see FIG. 10).

  The water stop portion S is a portion that stops water between the electric wires 41 in the portion positioned in the cylindrical portion 33 of the wire bundle 4, and includes a first water stop member 7a, a second water stop member 7b, It is formed by the water stop member 8 comprised by these.

  The first water stop member 7a and the second water stop member 7b are made of synthetic resin and formed in the same shape as each other, and the water stop material 6 injected into each case 5 ,have.

  As shown in FIG. 2, the case 5 has a rectangular parallelepiped bottom wall 54 and side walls 50a, 50b, 50c, 50d erected from the outer edge of the bottom wall 54 in a rectangular parallelepiped box shape. Is formed. An opening 51 is provided on the surface facing the bottom wall 54. Moreover, the edge part which protruded in the direction away from the opposing side walls 50c and 50d is provided in the edge part on the side away from the bottom wall 54 of the mutually opposing side walls 50c and 50d. The surface on the side away from the bottom wall 54 of the collar is formed flat. In addition, in this specification, a plane on the side of the heel portion away from the bottom wall 54 and a flat end surface on the side of the side walls 50a and 50b on the side away from the bottom wall 54 are referred to as edges and are denoted by reference numeral 52.

  Further, the case 5 has a concave portion 53 through which the wire bundle 4 formed in a concave shape from the edge portion 52 toward the bottom wall 54 is passed. The inner surface of the recess 53 is formed in an arc shape along the outer periphery of the wire bundle 4.

  In such a case 5, the uncured and gel-like water-stopping material 6 is injected from the opening 51. Further, the water-stopping member 8 can be maintained in an uncured state by covering the case 5 into which the water-stopping material 6 is poured with the plastic film 10 shown in FIG. ing. In addition, the plastic film 10 is covered to prevent foreign matter from entering the water-stopping material 6, deterioration due to moisture absorption and oxidation of the water-stopping material 6, evaporation of volatile components in the water-stopping material 6, and the like.

  The plastic film 10 is made of a synthetic resin such as polyethylene and is formed in a thin sheet shape. The plastic film 10 includes a rectangular first portion 10a and a substantially semicircular second portion 10b connected to each of a pair of outer edges of the first portion 10a facing each other. Yes. That is, two second portions 10b are provided. The plastic film 10 is attached to the outer surface of the case 5 so that the first portion 10 a covers the opening 51 and the second portion 10 b covers the recess 53. That is, it adheres. At this time, the plastic film 10 can be attached by a known heat sealing method or ultrasonic sealing method, and the plastic film 10 attached to the outer surface of the case 5 can be easily peeled off by hand. .

  The water blocking material 6 is made of a synthetic resin mainly composed of silicone or urethane, and is a material that cures in response to moisture in the air at room temperature. Further, the waterstop material 6 has a viscosity of 10 Pa. When uncured. It is preferable to use a gel-like material having a degree of s and a plasticity of 100 to 130 (measured according to the measurement method specified in JIS K 6249).

  As shown in FIG. 3, such a waterstop material 6 is injected up to the upper surface of the case 5, and the uncured state is maintained by covering the case 5 with the plastic film 10 immediately after the injection. Then, when the water stop portion S is formed, the plastic film 10 is peeled off from the case 5 to start the curing reaction. Moreover, this water-stopping material 6 is prevented from flowing out from the recess 53 when being injected into the case 5 by using a material having the above-mentioned viscosity and plasticity range.

  Moreover, in this embodiment, the water stop material 6 is inject | poured to the upper surface of the case 5, and when the case 5 covers the plastic film 10, this water stop material 6 is interrupted | blocked with external air, ie, air, and an unhardened state is maintained. However, in the present invention, it is also possible to reduce the injection amount of the water blocking material 6 by replacing the air in the case 5 with nitrogen or in a vacuum state.

  The water-stop member 8 having the above-described configuration is such that the case 5 of the first water-stop member 7a and the second water-stop member 7b is oriented so that the openings 51 face each other with the plastic film 10 removed. By sandwiching the wire bundle 4 between each other, the gel-like water blocking material 6 in the case 5 penetrates between the wires 41 and is cured. Further, the cases 5 of the first water stop member 7a and the second water stop member 7b are in the state in which the wire bundle 4 is sandwiched between them, that is, the wire bundle 4 is positioned in the recess 53. 52 abut each other to shield the opening 51. Moreover, the edge parts 52 are adhere | attached by apply | coating the adhesive agent 11 (refer FIG. 6) between these edge parts 52. FIG. That is, the cases 5 are fixed to each other. The pair of cases 5 are fixed to the wire bundle 4 by hardening the water stop material 6. Further, in order to prevent the water blocking material 6 from leaking out of the recess 53 until it is cured, the outer periphery of the wire bundle 4 and the outer periphery of the case 5 that are positioned outside the case 5 through the recess 53 are provided. The tape 91 is wound so as to shield the recess 53. In this way, the water stop part S is formed by the water stop material 6 that stops water between the electric wires 41 and the pair of cases 5 attached around the water stop material 6.

  Further, in the present invention, since the uncured gel-like water-stopping material 6 is used, the gel-like water-stopping material 6 sufficiently permeates the details between the electric wires 41, so that a gap is formed between the electric wires 41. Without making, water between the electric wires 41 can be surely stopped.

  Moreover, in this invention, since the recessed part 53 which lets the electric wire bundle 4 pass is provided in side wall 50a, 50b of case 5, since the edge parts 52 of a pair of case 5 can be contacted, edge parts 52 It is possible to prevent the uncured water-stopping material 6 from leaking out from between the wires, and thus the water between the wires 41 can be reliably stopped. Further, the edge portions 52 are bonded to each other without any gap by the adhesive 11 so that the pair of cases 5 are fixed to each other, and the tape 91 is wound around the outer periphery of the wire bundle 4 and the outer periphery of the case 5 so as to shield the recess 53. Therefore, it is possible to reliably prevent the uncured waterstop material 6 from leaking between the edge portions 52 and from the concave portion 53.

  As described above, the wire bundle 4 in which the water stop portion S is formed in a predetermined portion is passed through the grommet 3, and the cylindrical portion 33 is in a state where the outer surface of the case 5 is in close contact with the inner peripheral surface of the cylindrical portion 33. 1 and the outer periphery of the wire bundle 4 are both taped by a tape 92 to form the wire harness 1 shown in FIG.

  In such a wire harness 1, the outer surface of the grommet 3 is in close contact with the inner peripheral surface of the through hole 2 a, and the outer surface of the case 5 is in close contact with the inner peripheral surface of the cylindrical portion 33 of the grommet 3. Since the space between the wires 41 of the wire bundle 4 positioned at is stopped by the water blocking material 6, liquid such as water can be prevented from entering the room from the outside of the automobile.

  Furthermore, even if the wire bundle 4 is bent or twisted and a large external force is applied to the water stop portion S, the wire harness 1 is provided with the wire bundle 4 and the water stop material 6 positioned inside the case 5. Since it does not move, the electric wire 41 and the water stop material 6 do not peel off from each other, so that it is possible to reliably prevent liquid from entering and to maintain this good water stop for a long period of time.

  Then, the method to form the water stop part S in the wire bundle 4 of the wire harness 1 using the water stop member 8 of the structure mentioned above is demonstrated.

  First, as shown in FIG. 4, a water-stop material 6 is injected into the case 5 and a first water-stop member 7 a and a second water-stop member 7 b covered with a plastic film 10, that is, the water-stop member 8, Is prepared in advance.

  Then, as shown in FIG. 5, the plastic film 10 is peeled off from the case 5, and as shown in FIG. 6, the adhesive 11 is applied to the edge 52 of the case 5 of the first water stop member 7a.

  Then, the first water stop member 7a and the second water stop member 7b face each other in a direction in which the openings 51 face each other, and the wire bundle 4 is positioned in the concave portion 53 of the case 5. , The first water stop member 7a and the second water stop member 7b are brought close to each other, and as shown in FIG. 7, the first water stop member 7a and the second water stop member 7b The wire bundle 4 is sandwiched between the pair of cases 5. Moreover, by this, the edge parts 52 of the case 5 piled up mutually are adhere | attached, and the cases 5 are mutually fixed (equivalent to the water stop member attachment process in a claim).

  In this case, that is, in the state shown in FIG. 6, the opening 51 of the second water-stop member 7 b is directed downward, that is, vertically downward, but the viscosity and surface tension of the water-stop material 6. As a result, the water-stopping material 6 does not drip rapidly from the opening 51 of the case 5 of the second water-stopping member 7b. Similarly to this, the water stop material 6 does not leak rapidly from the recess 53 of the case 5 of the first water stop member 7a and the second water stop member 7b.

  Then, as shown in FIG. 8, the tape 91 is wound around the outer periphery of the wire bundle 4 and the outer periphery of the case 5 that are positioned outside the case 5 through the recess 53 so as to shield the recess 53.

  In this state, by setting a predetermined time, the water blocking material 6 in the case 5 slowly penetrates between the electric wires 41, and the water blocking material 6 that has penetrated between the electric wires 41 is cured as time passes. Moreover, when the water stop material 6 hardens | cures, a pair of case 5 is fixed to the wire bundle 4 (it corresponds to the water stop material hardening process in a claim). Thus, the water stop portion S is formed at a predetermined position of the wire bundle 4 by the water stop member 8.

  Then, as shown in FIG. 9, the wire bundle 4 in which the water stop portion S is formed is passed through the grommet 3, and the portion in which the water stop portion S is formed is pushed into the cylindrical portion 33 of the grommet 3, and the case 5 A tape 92 is wound around the outer periphery of the cylindrical portion 33 and the outer periphery of the wire bundle 4 drawn from the cylindrical portion 33 to the outside of the grommet 3. 4 and grommet 3 are fixed to each other. Thus, the wire harness 1 shown in FIG. 1 is assembled.

  As described above, according to the method for forming a water stop portion of the present invention, the water stop member 8 made into a component can be used without using the water stop material coating apparatus that is necessary for the water stop treatment of the conventional wire bundle 4. And the water stop part S can be easily formed in the wire bundle 4 in a short time.

  Next, a water stop member according to a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is a cross-sectional view showing a water stop member according to the second embodiment of the present invention. Also, in the figure, the same components as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  The water stop member 18 of this embodiment forms a water stop part in the wire bundle 4 of a wire harness similarly to the water stop member 8 of 1st Embodiment mentioned above (refer FIG. 1). The water stop member 18 includes a first water stop member 17a and a second water stop member 17b.

  The first water stop member 17a and the second water stop member 17b are made of synthetic resin and are injected into a pair of cases 15a and 15b formed in the same shape, and the respective cases 15a and 15b. And a water stop material 6.

  The pair of cases 15a and 15b have locking portions 55 and 56 that lock each other and fix the cases 15a and 15b with the wire bundle 4 sandwiched therebetween. That is, one case 15 a has a protruding portion 55 as a locking portion protruding from the edge portion 52, and the other case 15 b is formed in a concave shape from the edge portion 52 and is locked to the protruding portion 55. It has a hole 56 as a possible locking part. Further, the pair of cases 15 a and 15 b have the same configuration as the pair of cases 5 of the first embodiment except for the protrusion 55 and the hole 56.

  According to the water stop member 18 described above, the cases 15 a and 15 b can be fixed to each other without applying the adhesive 11 to the edge 52.

  In the first embodiment described above, an example in which the film attached to the case 5 is the plastic film 10 has been described. However, in the present invention, a metal film made of aluminum or the like, a release paper, or the like is used as the plastic film 10. It is also possible to use instead of.

  In the first and second embodiments described above, the example using the water stop material 6 that cures in response to moisture in the air has been described. However, in the present invention, other water stop materials, for example, liquid A It is also possible to use a two-component water-stopping material that cures by mixing the B and the B solution. In that case, the liquid A may be injected into one of the pair of cases 5, 15a, 15b, and the liquid B may be injected into the other.

  In the first and second embodiments described above, the example in which the pair of cases 5, 15 a, and 15 b are fixed to each other by the adhesive 11 or the protruding portion 55 and the hole portion 56 has been described. In addition, for example, the pair of cases 5, 15 a, and 15 b may be fixed by welding the edges 52 using a heat sealing method.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is sectional drawing which shows the wire harness which has the water stop member concerning the 1st Embodiment of this invention. It is a perspective view which shows the case of the water stop member shown by FIG. It is a top view which shows the state by which the water stop material was inject | poured into the case of the water stop member shown by FIG. 1, and the opening part of this case was covered with the plastic film. It is explanatory drawing explaining the water stop part formation method using the water stop member shown by FIG. 1, and is a figure which shows the water stop member at the time of storage. It is a figure which shows the state from which the plastic film of the water stop member shown by FIG. 4 was peeled off. It is a figure which shows the state by which a pair of case of the water stop member shown by FIG. 5 was faced. It is a figure which shows the state by which the wire bundle was pinched | interposed between a pair of cases of the water stop member shown by FIG. 6, and cases were mutually fixed. It is a figure which shows the state by which the water stop member shown by FIG. 7 and the electric wire bundle were wound together with the tape, and were fixed. It is a figure which shows the state in which the wire bundle provided with the water stop part shown in FIG. 8 passes a grommet. It is sectional drawing which shows the water stop member concerning the 2nd Embodiment of this invention. It is sectional drawing which shows the conventional wire harness.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Panel 2a Through-hole 3 Grommet 4 Electric wire bundle 5, 15a, 15b Case 6 Water stop material 8, 18 Water stop member 10 Plastic film 41 Electric wire 51 Opening part 52 Edge part 53 Concave part 55 Protrusion part (locking part)
56 hole (locking part)
S water stop

Claims (4)

A water stop member that forms a water stop portion that stops water between the wires of the wire bundle,
A pair of box-shaped cases having openings, and an uncured gel-like water-stopping material injected into each of the pair of cases,
The pair of cases sandwich the wire bundle between each other in a direction in which the openings face each other and are fixed to the wire bundle, and the uncured water stop material penetrates between the wires. To form the water stop portion by curing,
The opening of the case filled with the uncured water-stopping material is stored in a state covered with a metal film, a release paper or a plastic film, and the metal film is used when the wire bundle is water-stopped. , waterproofing member, characterized in that use said stripped the release paper or the plastic film. The pair of cases has an edge part that abuts against each other and shields the opening, and a recessed part that is formed concavely from the edge part and that passes the wire bundle ,
The said recessed part of the said case where the said uncured water stop material was inject | poured is stored in the state covered with the said metal film, the said release paper, or the said plastic film, The stop of Claim 1 characterized by the above-mentioned. Water member. A wire harness having a cylindrical grommet attached to a through-hole provided in a panel, a wire bundle passed through the grommet, and a water stop portion that stops water between the wires of the wire bundle,
The said water stop part is formed of the water stop member of Claim 1 or Claim 2. The wire harness characterized by the above-mentioned. A water stop part forming method for forming a water stop part that stops water between each wire of a wire bundle using the water stop member according to claim 1 or 2 ,
Peeling the metal film, the release paper or the plastic film from the case;
The pair of cases face each other in a direction in which the openings face each other, and a water-stopping member attaching step of sandwiching the wire bundle between the pair of cases,
A water stopping material curing step for curing the water stopping material that has permeated between the wires to stop water between the wires, and fixing the pair of cases to the wire bundle;
The waterstop part forming method characterized by having sequentially.

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