JP2013157244A - Fitting method for wire seal, and wire seal fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely fit even a wire seal such that a step on an outer peripheral surface is not distinct to an electric wire.SOLUTION: A wire seal holder 11 is prepared which has a housing hole 11a larger than an outer diameter of an electric wire 3 and has a holder-side step 11b formed so that a wire seal insertion side in the housing hole 11a is larger than the housing hole 11a, and is higher in rigidity than a wire seal 5. While a tip side of the wire seal 5 is inserted into the housing hole 11a and a first seal-side step 7 having a larger diameter than the tip side of the wire seal 5 is made to abut against the holder-side step 11b, a tip of a terminal part 3a of the electric wire 3 is pushed in relatively almost to nearby the tip of the wire seal 5, and the electric wire 3 is drawn back relatively from the wire seal holder 11 together with the wire seal 5 and inserted again relatively into the wire seal holder 11 so as to make the wire seal 5 abut against the holder-side step 11b at a tip part as compared with the first seal-side step 7.

Description

  The present invention relates to a wire seal attachment method and a wire seal attachment device, and more particularly to a technique for facilitating attachment of a wire seal to an insulated coated electric wire.

  For example, an electric wire connected to an automobile electrical component or the like is formed by covering the outer periphery of a core wire made of a plurality of copper wires with an insulating coating, and the terminal portion has the insulating coating removed by a predetermined length. A connection terminal is pressure-bonded to the core wire portion and the insulating coating portion, and a connector housing is attached so as to cover the connection terminal and the wire terminal portion.

  In this type of connector, particularly in the case where it is disposed in the engine room of an automobile, in order to prevent rainwater or the like from entering the inside of the connector, a wire is placed on the outer periphery of the insulation coating around the terminal portion of the wire. A seal is installed. The wire seal is made of rubber and has a substantially cylindrical shape, and its inner diameter is slightly smaller than the outer diameter of the electric wire. And when attaching a wire seal to an electric wire, an electric wire is inserted in a wire seal and the terminal part of an electric wire is made to protrude from the edge part of a wire seal only by a predetermined dimension. At that time, since the inner diameter of the wire seal is slightly smaller than the outer diameter of the electric wire, the wire seal is slightly elastically deformed in the radial direction. That is, the electric wire is inserted into the wire seal while expanding the inner diameter of the wire seal. When the electric wire is inserted in this manner, the insulation coating and the wire seal are brought into close contact with each other by the elastic force accompanying the elastic deformation in the radial direction of the wire seal so that the waterproof function is exhibited. However, when an electric wire is inserted into the wire seal, the wire seal is not only elastically deformed in the radial direction, but also due to insertion frictional resistance between the outer peripheral surface of the electric wire and the inner peripheral surface of the wire seal. The inner peripheral surface and its peripheral part will be slightly deformed in the direction of insertion of the electric wire. If this deformation exceeds the elastic region, this deformation will remain. When the inner peripheral surface of the wire seal and its peripheral portion are deformed in this way, a part of the inner peripheral surface of the wire seal is separated from the outer peripheral surface of the insulation coating, and sufficient elastic force is exhibited. The waterproof function will be reduced. In addition, when the wire seal is elastically deformed due to the insertion of the electric wire, if the clamp state of the electric wire and the wire seal is released after the electric wire is inserted, the elastic deformation of the wire seal is released, and accordingly the electric wire Since the attachment position of the wire seal is shifted, the wire seal cannot be attached at the optimum position, and this also causes a problem that the waterproof function of the wire seal is lowered.

  Therefore, for example, as in Patent Document 1, a method of attaching a rubber plug is known in which a wire plug is inserted into a wire insertion hole of a cylindrical rubber plug and a rubber plug is attached to a specified position in the axial direction of the electric wire. Yes. In this attachment method, after executing the first relative movement step of moving the rubber plug relative to the electric wire so that the electric wire is inserted into the wire insertion hole of the rubber plug to a position exceeding the specified position, the electric wire is moved to at least the specified position. A second relative movement step of moving the rubber plug relative to the electric wire so as to be pulled back with respect to the rubber plug is executed, and then, the first relative movement step and the second relative movement step are further performed at least once in this order. A repetitive step is executed, and the relative movement of the rubber plug and the electric wire is stopped so that the rubber plug is positioned at a predetermined position at the end of the repetitive step.

JP 2007-317495 A

  In the method of attaching the wire seal of Patent Document 1, after the rubber stopper with the field pin inserted is accommodated in the accommodating space of the lower holder in the state where the upper and lower divided rubber stopper holders are opened up and down, the rubber stopper holder is removed. Then, the field pin is retracted and then the electric wire is inserted into the electric wire insertion hole, and the rubber plug is positioned at the specified position by repeating the insertion and pull-back operations at least twice.

  However, this method requires a space and a mechanism for opening and closing the rubber plug holder. Further, although it can be applied to a wire seal (rubber plug) having a clear outer peripheral surface step, there is a problem that the step is not clear and cannot be applied to a relatively thin and soft wire seal.

  That is, when a relatively thin and soft wire seal is used in the mounting method disclosed in Patent Document 1, an electric wire can be inserted into the wire seal, but there is only a slight step difference in the wire seal. However, at the step portion of the rubber plug holder, the rubber plug holder enters the small diameter portion of the rubber plug holder without being held.

  Next, even if the wire is pulled back, there is not enough space to pull back the wire seal until the large diameter part of the wire seal comes out into the large diameter part space of the rubber plug holder, so the large diameter part of the wire seal becomes the small diameter part of the rubber plug holder. Stays and the wire seal cannot be positioned accurately.

  Moreover, if the wire seal is moved back and forth while the wire seal large diameter portion remains in the small diameter portion of the rubber plug holder, a large load is applied to the thin wire seal, and the wire seal may be cracked.

  The present invention has been made in view of such a point, and an object of the present invention is to enable reliable positioning on an electric wire even with a highly flexible wire seal in which a step on an outer peripheral surface is not clear.

  In order to achieve the above object, in the present invention, the portions that are brought into contact with the step on the holder side are different before and after the insertion of the wire.

Specifically, in the first invention,
A wire seal mounting method for attaching a wire seal to the outer periphery of the insulation coating of the wire end portion by inserting the wire into a wire seal made of an elastic member having a wire insertion hole having a diameter smaller than the outer diameter of the insulation coated wire Assuming

And the mounting method is
A wire seal that has a housing hole larger than the outer diameter of the electric wire, and has a step on the holder side so that the wire seal insertion side in the housing hole is larger than the housing hole, and is more rigid than the wire seal. A preparation process for preparing a holder;
A seal supply step of inserting the wire seal so that the tip side of the wire seal is inserted into the housing hole and the seal side step having a larger diameter than the tip side of the wire seal does not exceed the holder side step;
A first insertion step of relatively pushing the tip of the end portion of the wire to the vicinity of the tip of the wire seal in a state where the seal-side step is in contact with the holder-side step;
A pulling back step of pulling the electric wire together with the wire seal from the wire seal holder;
A second insertion step in which the electric wire is inserted again into the wire seal holder again, and the wire seal is brought into contact with the holder-side step at a tip portion of the seal-side step.

  According to the above configuration, in the wire seal supply process, since no electric wire is inserted into the wire insertion hole, the outer diameter of the wire seal is not expanded, and the wire seal is not to exceed the holder side step. It is supplied into the accommodation hole of the wire seal holder. And in a 1st insertion process, the front end side enters a receiving hole rather than a seal | sticker side level | step difference. When the electric wire is inserted into the wire insertion hole in this state, the inner diameter of the wire insertion hole is smaller than the outer diameter of the electric wire, so that the electric wire is inserted into the wire seal while the wire seal is deformed. At this time, since the wire seal holder has higher rigidity than the wire seal, the wire seal cannot be expanded in the radial direction, and is bent in the length direction of the electric wire. Then, in the pulling back process, the wire seal is released from bending in the length direction, and the diameter is expanded in the radial direction. Then, in the next second insertion step, since the outer diameter of the wire seal holder is larger than that before inserting the electric wire, before the seal-side step comes into contact with the holder-side step, the tip portion is more than the seal-side step. The wire seal does not enter the housing hole by contacting the step on the holder side, and only the electric wire advances so as to slide through the housing hole, and the bending in the length direction of the wire seal is reduced.

In the second invention, in the first invention,
In the second insertion step, the tip of the wire seal is brought into contact with the step on the holder side.

  According to the above configuration, when only one step is provided on the outer periphery of the wire seal, the seal-side step contacts the holder-side step before inserting the wire, and in the second insertion step after inserting the wire, the wire is inserted. The tip of the wire seal swelled by this comes into contact with the step on the holder side. For this reason, the wire seal does not enter the housing hole more than necessary, and only the electric wire advances through the housing hole, and the wire seal slides to reduce the bending in the length direction. Even when a plurality of steps are provided on the outer periphery of the wire seal, the tip end of the wire seal swollen by inserting the electric wire may be brought into contact with the step on the holder side.

In the third invention, in the first invention,
In the second insertion step, a second seal side step having a smaller diameter than the seal side step of the wire seal is brought into contact with the holder side step.

  According to the above configuration, when a plurality of steps are provided on the outer periphery of the wire seal, the seal-side step contacts the holder-side step before inserting the wire, and the wire insertion is performed in the second insertion step after inserting the wire. The second seal side step swollen by the contact with the holder side step. For this reason, the wire seal does not enter the housing hole more than necessary, and only the electric wire advances through the housing hole, and the wire seal slides to reduce the bending in the length direction.

In a fourth invention, in any one of the first to third inventions,
After the second insertion step, the method includes an adjustment step of pulling back the electric wire and adjusting the wire seal to a specified position.

  According to the above configuration, accurate positioning is performed while preventing the wire seal from being bent by being finally adjusted to the specified position outside the wire seal holder in the adjustment step.

  In the fifth invention, in the adjustment step, the insertion step and the pulling back step may be repeated until the final positioning at the specified position, and the moving may be performed gradually at the specified position.

  According to said structure, by repeating the back-and-forth movement of an electric wire and moving to a regulation position little by little, the elastic deformation of a wire seal can be eliminated reliably and a wire seal can be attached in the optimal state.

  In the sixth invention, a wire seal attachment device for attaching a wire seal to a terminal portion of the electric wire by inserting the electric wire into a wire seal made of an elastic member having a wire insertion hole having a diameter smaller than the outer diameter of the electric wire. Assuming

And the mounting device is
A wire seal holder having a housing hole larger than the outer diameter of the electric wire, and a holder-side step formed so that the wire seal insertion side in the housing hole is larger than the housing hole;
The wire insertion hole is left hollow and the tip end side of the wire seal is inserted into the receiving hole, so that the seal side step having a larger diameter than the tip end side of the wire seal does not exceed the holder side step. A seal supply section for supplying the seal;
After pushing the tip of the end of the wire to the vicinity of the tip of the wire seal in a state where the step on the seal side is in contact with the step on the holder side, the wire is once pulled back from the wire seal holder together with the wire seal, It is set as the structure provided with the relative movement control part which inserts the said electric wire in the said wire seal holder again, and contact | abuts the said wire seal on the said holder side level | step difference.

  According to the above configuration, when the wire seal is supplied to the wire seal holder by the seal supply unit, since the electric wire is not inserted into the wire insertion hole, the outer diameter of the wire seal is not expanded, and the step on the seal side is the holder. A wire seal is supplied into the receiving hole of the wire seal holder without exceeding the side step. When the relative movement control unit inserts the electric wire into the wire seal, since the inner diameter of the wire insertion hole is smaller than the outer diameter of the electric wire, the electric wire is inserted into the wire seal while the wire seal is deformed. At this time, since the wire seal holder has higher rigidity than the wire seal, the wire seal cannot be expanded in the radial direction, and is bent in the length direction of the electric wire. And once it moves in the direction which pulls back an electric wire and releases the bending of the length direction of a wire seal, a diameter will spread also to radial direction. Next, when the wire seal holder is inserted into the receiving hole, the outer diameter of the wire seal holder is larger than that before insertion of the electric wire. The wire seal does not enter the housing hole by abutting on the side step, and only the electric wire advances through the housing hole, and the bending of the wire seal in the length direction is reduced while the wire seal slides.

In a seventh invention, in the sixth invention,
The wire seal has a second seal-side step having a smaller diameter than the seal-side step, and the second seal-side step is larger in diameter than the holder-side step in a state where the electric wire is inserted into the wire seal. It is comprised so that it may become.

  According to the above configuration, when a plurality of steps are provided on the outer periphery of the wire seal, the state where the second seal side step enters the receiving hole and the seal side step contacts the holder side step before inserting the electric wire. When the electric wire is inserted and moved in the direction of pulling it back and then inserted into the wire seal holder again, the second seal-side step of the wire seal swollen by the electric wire insertion comes into contact with the holder-side step. For this reason, since the second seal-side step does not go deeper than the holder-side step, even if the electric wire is further inserted, only the electric wire advances through the accommodation hole, and the bending in the length direction of the wire seal is reduced.

In the eighth invention, in the sixth or seventh invention,
A stripped portion for stripping a predetermined length of the insulating coating on the tip side of the wire seal in a state where the wire seal is attached,
A terminal crimping portion for crimping the connection terminal to the exposed core of the electric wire and the insulating coating;

  According to said structure, since attachment of a wire seal and crimping | bonding of a connection terminal can be performed with one wire seal attachment apparatus, efficiency is good.

  As described above, according to the present invention, the tip end side of the wire seal is inserted into the receiving hole of the wire seal holder having a rigidity higher than that of the wire seal, and the seal-side step having a larger diameter than the tip end side of the wire seal is formed. Supply the wire seal in contact with the step on the holder side, push the tip of the end of the wire to the vicinity of the tip of the wire seal, and once move the wire in the direction of pulling it back together with the wire seal from the wire seal holder. Is inserted into the wire seal holder, and the wire seal is brought into contact with the holder-side step at the tip of the seal-side step, so that even a flexible wire seal with a clear outer peripheral step can be securely attached to the electric wire. Can do.

It is sectional drawing which shows the 1st insertion process of the attachment method of the wire seal which concerns on embodiment of this invention. It is a side view which shows the 1st insertion process of the attachment method of the wire seal which concerns on embodiment of this invention. It is sectional drawing which shows the state in which the wire seal was accommodated in the accommodation hole of the wire seal holder which concerns on embodiment of this invention. It is sectional drawing which shows the 1st pullback process of the attachment method of the wire seal which concerns on embodiment of this invention. It is sectional drawing which shows the 2nd insertion process of the attachment method of the wire seal which concerns on embodiment of this invention. It is sectional drawing which shows the 2nd pullback process of the attachment method of the wire seal which concerns on embodiment of this invention. It is an enlarged front view of a wire seal. It is an enlarged front view of the wire seal which concerns on other embodiment. It is sectional drawing which shows the 2nd insertion process of the attachment method of the wire seal which concerns on other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG.1 and FIG.2 shows the principal part of the attachment apparatus 10 of the wire seal 5 of embodiment of this invention, and this attachment apparatus 10 is provided in the wire processing apparatus (the whole is not shown). This attachment device 10 is controlled by a relative movement control unit (not shown), and a tube-like wire is connected to a terminal portion 3a of an insulating coated electric wire 3 in which an outer periphery of a core wire 1 made of a copper wire or the like is covered with an insulating coating 2 such as vinyl chloride. The seal 5 is configured to be attached.

  Most of the electric wire processing apparatus may be configured in the same manner as in the past, and detailed description is omitted. However, the electric wires 3 fed by a predetermined amount in a predetermined direction along the electric wire feeding line are cut and processed. Wire seals 5 are attached to the outer periphery of the insulation coating 2 of the terminal portion 3a of the electric wire 3, respectively. Then, after the wire seal 5 is attached by the stripping portion, the insulation coating 2 on the tip side from the mounting position of the wire seal 5 of each terminal portion 3a is stripped, and the coating stripping process for exposing the core wire 1 is performed. Then, the terminal crimping part crimps the connection terminal (not shown) to the covering stripped portion, and the harness in which the connection terminal is crimped is sequentially manufactured with the wire seal 5 attached. It is configured.

  Although not shown in detail, the seal supply unit that supplies the wire seal 5 is installed on a separate mounting base different from the main body base of the wire processing apparatus, and for example, a vibratory parts feeder that sequentially supplies and supplies the wire seal 5 It has. The wire seals 5 that are sequentially aligned and supplied from the parts feeder are supplied to the wire seal holder 11 by using compressed air.

  As shown in FIGS. 3 to 7, the wire seal 5 includes a wire insertion hole 6 having an inner diameter (D2) smaller than the outer diameter dimension (D1) of the portion covered with the insulating coating 2 of the insulating coated electric wire 3 ( D1> D2), for example, made of an elastic member such as silicon rubber. The wire seal 5 has, for example, a plurality of steps on the outer periphery, that is, a first seal-side step 7 formed on the distal end side of the largest outer diameter D3 portion, and an outer diameter D4 smaller than the first seal-side step 7. And a second seal side step 8 on the tip side of the portion (D4 <D3). As shown in FIG. 7, the first seal side step 7 is drawn so as to have a partly vertical surface, but the second seal side step 8 is formed in a step shape with a tapered outer diameter. Has been. Thus, in the present invention, the step may have not only a vertical surface but also an inclined surface without a vertical surface.

  As shown in FIG. 3, the wire seal holder 11 has a receiving hole 11a having an inner diameter D5 larger than the outer diameter D1 of the electric wire 3 (D5> D1), and the wire seal 5 is inserted into the receiving hole 11a. The inner diameter is large so that the holder-side step 11b is formed so that the side has a larger inner diameter D6 than the accommodation hole 11a. The dimensional relationship in this embodiment is D2 (inner diameter of the wire insertion hole 6) <D1 (outer diameter of the electric wire 3) <D4 (outer diameter of the second seal-side step 8 before insertion of the electric wire 3) ≦ D5 (accommodating hole) 11a) <D3 (outer diameter of first seal side step 7) <D6 (inner diameter of holder side step 11b). The wire seal holder 11 serves to hold the wire seal 5 when the insulation-coated electric wire 3 is inserted. The wire seal holder 11 preferably has a rigid structure made of a metal material such as aluminum alloy or iron, hard resin, rubber harder than the wire seal, etc., but is at least harder than the wire seal 5 and swells when the electric wire 3 is inserted. The wire seal 5 should be rigid so as not to be deformed.

  As shown in FIGS. 1 and 2, the attachment device 10 includes an electric wire guide 12 as a guide body that guides the electric wire 3 to the wire seal holder 11. The electric wire guide 12 includes an upper arm 12a and a lower arm 12b that can be moved up and down at least, and a guide recess 12c of the upper arm 12a and a guide recess 12c of the lower arm 12b. A guide hole is formed so as to enter the accommodation hole of the wire seal holder 11. Therefore, the inner diameter of the guide recess 12 c is equal to or larger than the outer diameter D1 of the electric wire 3.

  Next, the process of attaching the wire seal 5 to the electric wire 3 will be described with reference to the drawings.

  First, in the seal supply process, as shown in FIG. 3, the wire seal 5 that is sequentially aligned and supplied by the parts feeder is inserted into the accommodation hole 11 a by compressed air, and has a diameter larger than that of the tip side. The first seal side step 7 is accommodated in the accommodation hole 11a so as to contact the holder side step 11b. At this time, as shown in FIG. 3, the first seal-side step 7 may stop before contacting the holder-side step 11 b. In this seal supply process, since the electric wire 3 is not inserted into the wire insertion hole 6, the outer diameter of the wire seal 5 is not expanded, and the second seal-side step 8 enters the accommodation hole 11a.

  Next, in the first insertion step, the electric wire 3 held by the electric wire clamp (not shown) is guided by the electric wire guide 12 and inserted into the wire seal 5 accommodated in the accommodation hole of the wire seal holder 11. The As shown in FIG. 1, with the first seal-side step 7 in contact with the holder-side step 11 b, at least the end of the terminal portion 3 a of the electric wire 3 exceeds the second seal-side step 8 of the wire seal 5. Push in. At this time, the second seal-side step 8 enters the accommodation hole 11a, and the inner diameter D5 of the wire insertion hole 6 is smaller than the outer diameter D1 of the electric wire 3, so that the electric wire 3 is deformed while the wire seal 5 is deformed. It is inserted into the wire seal 5. However, since the wire seal holder 11 is higher in rigidity than the wire seal 5, the wire seal 5 can not spread in the radial direction and bends in the length direction of the electric wire 3. Since the first seal-side step 7 is in contact with the holder-side step 11b, the wire seal 5 does not enter the receiving hole 11a any more. Therefore, the difference between the outer diameter D3 of the first seal-side step 7 and the inner diameter D6 of the holder-side step 11b may be set so that the wire does not enter when the wire is inserted.

  Next, in the first pulling step, the wire 3 is once pulled back together with the wire seal 5 from the wire seal holder 11 while being guided by the wire guide 12. When the electric wire 3 is slightly pulled back, the terminal portion 3a of the electric wire 3 is inserted into the wire insertion hole 6 of the wire seal 5 in a slightly press-fitted state, and the wire seal 5 together with the electric wire 3 is also accommodated in the receiving hole 11a due to its frictional resistance. It is moved in the direction of more separation. Then, as shown in FIG. 4, the wire seal 5 is in contact with the peripheral edge of the guide recess 12 c of the wire guide 12. At this time, the bending in the length direction of the wire seal 5 is released so that the wire seal 5 slides on the insulating coating 2 and also spreads in the radial direction.

  Next, in the second insertion step, as shown in FIG. 5, the electric wire 3 is inserted again into the wire seal holder 11, and the wire seal 5 is brought into contact with the holder-side step 11 b at the tip portion of the first seal-side step 7. Let That is, since the outer diameter D4 of the wire seal 5 is larger than that before the electric wire 3 is inserted, before the first seal-side step 7 comes into contact with the holder-side step 11b, the outer end D4 is more distal than the first seal-side step 7. The second seal side step 8 contacts the holder side step 11b. And this 2nd seal | sticker side level | step difference 8 becomes a stopper with respect to the holder side level | step difference 11b, and since the 2nd seal | sticker side level | step difference 8 does not penetrate deeper than the holder side level | step difference 11b like at the time of a 1st insertion process, Proceeding to slide through the accommodation hole 11a, the bending of the wire seal 5 in the length direction is reduced. From this, the difference between the outer diameter D4 of the second seal side step 8 after insertion of the electric wire 3 and the inner diameter D6 of the holder side step 11b is set so that the electric wire 3 does not enter when the electric wire 3 is inserted for the second time. Good. At this time, the electric wire 3 is inserted up to a position exceeding a specified length with respect to the wire seal 5.

  Next, in the second pull back step, the wire 3 is pulled back from the wire seal holder 11 together with the wire seal 5 by the wire guide 12. And the state which the wire seal 5 contact | abutted to the recessed part 12c for guides of the electric wire guide 12 again is obtained.

  Next, in the adjusting step, as shown in FIG. 6, the movement of the wire seal 5 is restricted by further pulling back the electric wire 3 while the wire seal 5 is in contact with the periphery of the guide recess 12c. In this state, the electric wire 3 is pulled back, and the mounting position of the wire seal 5 is adjusted. Thereby, the state by which the wire seal 5 was mounted | worn in the defined position corresponding to the defined length position as a product of the terminal part 3a of the electric wire 3 is obtained. In this adjustment step, the positioning is finally performed outside the wire seal holder 11 so that accurate positioning is performed while preventing the wire seal 5 from being bent. For example, in this adjustment step, a timer may be provided to stop and the deformation of the wire seal 5 may be recovered by its elasticity.

  In the above adjustment process, as the process of positioning to the final specified position, the insertion process and the pull-back process of FIG. 5 and FIG. 6 are moved back and forth in a plurality of times and moved gradually to be positioned at the specified position. You may make it do. By carrying out like this, the elastic deformation of the wire seal 5 can be eliminated, and the wire seal 5 can be attached in an optimal state.

  Next, in the stripping step, the insulating coating 2 on the tip side of the wire seal 5 is stripped by a predetermined length with the wire seal 5 attached.

  Next, in the terminal crimping step, the connection terminal is crimped to the exposed core wire 1 and insulating coating 2 of the electric wire 3. Thus, the attachment of the wire seal 5 and the crimping of the connection terminal can be performed by the single wire seal attachment device 10.

  Therefore, according to the attachment method of the wire seal according to this embodiment, even a highly flexible wire seal in which the step on the outer peripheral surface is not clear can be reliably attached to the electric wire 3.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above embodiment, the second seal-side step 8 is provided on the distal end side of the wire seal 5, but it is not always necessary to provide this step. As shown in FIG. Only 107 may be provided. In this case, for example, the outer diameter D4 equivalent to the second seal-side step 8 of the above embodiment may be maintained up to the tip side. As described above, when only one step is provided on the outer periphery of the wire seal 5, in the first insertion step, the first seal-side step 7 contacts the holder-side step 11b as in the above embodiment, and the second insertion is performed. In the process, as shown in FIG. 9, the tip 108 swelled by the insertion of the electric wire 3 comes into contact with the holder-side step 11b. For this reason, the wire seal 105 does not enter the housing hole 11a any more and only the electric wire 3 advances through the housing hole 11a, and the bending of the wire seal 105 in the length direction is reduced. In this way, the difference between the outer diameter D4 of the tip 108 after insertion of the electric wire 3 and the inner diameter D6 of the holder-side step 11b may be set so that the electric wire 3 does not enter when the electric wire 3 is inserted for the second time.

  Moreover, in the said embodiment, although the wire seal holder 11 is not made into the up-and-down division type, it is good also as an up-and-down division type. Further, in order to form the holder-side step 11b of the wire seal holder 11, a collar having the same inner diameter as the accommodation hole 11a is fitted into the wire seal holder 11, and the holder-side step 11b is formed at the end of this collar. Good.

  Moreover, in the said embodiment, although the electric wire 3 moves and is inserted in the wire seal 5 with respect to the wire seal holder 11, the wire seal holder 11 moves with respect to the electric wire 3, and inserts in the electric wire 3. It does not matter as long as it can be inserted by relative movement.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for the wire seal attachment method and the wire seal attachment device.

1 core wire
2 Insulation coating
3 Insulated wire
3a terminal
5 Wire seal
6 Wire insertion hole
7 First seal side step
8 Second seal side step
10 Wire seal mounting device
11 Wire seal holder
11a accommodation hole
11b Step on the holder side
12 Electric wire guide (guide body)
12a Upper arm
12b Lower arm
12c Guide recess 105 Wire seal 107 First seal side step 108 Tip

Claims (8)

A wire seal mounting method for attaching a wire seal to the outer periphery of the insulation coating of the wire end portion by inserting the wire into a wire seal made of an elastic member having a wire insertion hole having a diameter smaller than the outer diameter of the insulation coated wire In
A wire seal that has a housing hole larger than the outer diameter of the electric wire, and has a step on the holder side so that the wire seal insertion side in the housing hole is larger than the housing hole, and is more rigid than the wire seal. A preparation process for preparing a holder;
A seal supply step of inserting the wire seal so that the tip side of the wire seal is inserted into the housing hole and the seal side step having a larger diameter than the tip side of the wire seal does not exceed the holder side step;
A first insertion step of relatively pushing the tip of the end portion of the wire to the vicinity of the tip of the wire seal in a state where the seal-side step is in contact with the holder-side step;
A pulling back step of pulling the electric wire together with the wire seal from the wire seal holder;
And a second insertion step of inserting the wire again into the wire seal holder and bringing the wire seal into contact with the holder-side step at a tip portion of the seal-side step. How to install the seal. The wire seal attachment method according to claim 1,
A wire seal attachment method, wherein the tip of the wire seal is brought into contact with the step on the holder side in the second insertion step. The wire seal attachment method according to claim 1,
A method of attaching a wire seal, wherein, in the second insertion step, a second seal side step having a smaller diameter than the seal side step of the wire seal is brought into contact with the holder side step. In the attachment method of the wire seal as described in any one of Claims 1 thru | or 3,
After the electric wire is inserted to a position exceeding the specified position in the second insertion step, the electric wire is moved in the direction of pulling back the wire seal together with the wire seal, and the wire seal is guided in the vicinity of the accommodation hole of the wire seal holder. A method of attaching a wire seal, comprising an adjustment step of adjusting the position to a specified position by contacting the body and retracting the electric wire. In the attachment method of the wire seal of Claim 4,
The wire is characterized in that the adjusting step gradually positions the wire seal at a specified position by repeating the insertion step of bringing the wire seal into contact with the holder step and the pulling back step of contacting the guide body a plurality of times. How to install the seal. A wire seal attachment device for attaching a wire seal to the outer periphery of the insulation coating of the terminal portion of the electric wire by inserting the electric wire into a wire seal made of an elastic member having a wire insertion hole having a diameter smaller than the outer diameter of the insulation coated electric wire In
A wire seal that has a housing hole larger than the outer diameter of the electric wire, and has a step on the holder side so that the wire seal insertion side in the housing hole is larger than the housing hole, and is more rigid than the wire seal. A holder,
The wire seal is inserted so that the tip end side of the wire seal is inserted into the receiving hole while the wire insertion hole remains hollow, and the seal-side step larger in diameter than the tip end side of the wire seal does not exceed the holder-side step. A seal supply section for supplying
A direction in which the end of the end of the electric wire is pushed to the vicinity of the end of the wire seal in a state where the step on the seal side is in contact with the step on the holder side, and then the electric wire is pulled back from the wire seal holder together with the wire seal. And a relative movement control unit that reinserts the electric wire into the wire seal holder and abuts the wire seal on the holder side step at a tip portion of the seal side step. Wire seal attachment device. In the wire seal attachment apparatus according to claim 6,
The wire seal has a second seal-side step having a smaller diameter than the seal-side step, and the second seal-side step is larger in diameter than the holder-side step in a state where the electric wire is inserted into the wire seal. It is comprised so that it may become. The wire seal attachment apparatus characterized by the above-mentioned. The wire seal attachment device according to claim 6 or 7,
A stripped portion for stripping a predetermined length of the insulating coating on the tip side of the wire seal in a state where the wire seal is attached,
A wire seal mounting apparatus comprising: a terminal crimping portion for crimping a connection terminal to the exposed core of the electric wire and the insulating coating.

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