JP2009272122A - Waterproof electric wire, manufacturing method thereof, and manufacturing device of the wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof electric wire capable of obtaining stable waterproofing performance. <P>SOLUTION: In this manufacturing method of the waterproof electric wire 1, constituted by a sealing agent dropping process S, where a fluid sealing agent 12 is dropped at one end of a coated electric wire 40, which is mounted with a crimp terminal 20 by crimping a barrel portion 30, and a sealing agent infiltrating process P where the fluid sealing agent 12 is made to infiltrate the inside 40a of coated electric wire 41, by causing a pressure difference between the peripheral pressure of the portion, where the fluent sealing agent 12 has been dropped and a pressure of the inside 40a of coated electric wire which is inside an insulating coating; the sealing agent infiltrating process P is carried out, after end of the sealing agent dropping process S, where dropping of a predetermined amount of fluid sealing agent 12 is finished, and these are alternately repeated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water stop electric wire provided with a water stop portion inside a covered electric wire used as an electric wire for a vehicle, for example.

  In a vehicle in which a plurality of electronic components are mounted, there is a vehicle wire connecting them that requires high waterproofness. Conventionally, various types of vehicle waterproof wires for waterproofing, that is, water stopping purposes, have been used. Manufacturing methods have been proposed. For example, Patent Document 1 describes a method of penetrating a water-stopping agent into the electric wire by sucking the inside of the electric wire from the other end while supplying (dropping) the water-stopping agent to one end of the covered electric wire.

  However, in the method described in Patent Document 1, since the water-stopping agent is supplied and sucked at the same time, the water-stopping agent is drawn into the coating material in a non-uniform distribution state in the radial cross section of the electric wire. Become.

  Thereby, for example, the water-stopping agent is biased toward the water-stopping agent supply side of the cross section in the radial direction of the electric wire, and the water-stopping agent does not spread sufficiently on the side away from the supply side, and the water-stopping performance cannot be stably obtained. There was a problem

Japanese Patent Laid-Open No. 2004-355851

  An object of this invention is to provide the water stop electric wire from which the stable water stop performance is obtained.

  The present invention relates to a covered electric wire in which a conductor portion constituted by a plurality of strands is covered with an insulating covering material, and a terminal is attached to at least one end by a barrel portion to be crimped, and the covered electric wire to which the terminal is attached A pressure difference between a water-stopping agent supplying step of supplying a water-stopping agent to one end, an ambient pressure of a portion to which the water-stopping agent is supplied, and a pressure inside the covered electric wire that is inside the insulating covering material; A method for producing a water-stopping electric wire comprising the step of infiltrating the water-stopping agent into the covered electric wire, wherein the water-stopping agent supplying step and the infiltration step are alternately repeated. To do.

  As an aspect of the present invention, the permeation step can be started after the water-stopping agent supply step, in which the supply of a predetermined amount of the water-stopping agent is ended in the water-stopping agent supply step.

  As an aspect of the present invention, in the infiltration step, the pressure difference generation timing for generating the pressure difference can be set after a predetermined time has elapsed since the water stop agent supply stop in the water stop agent supply step.

  Further, as an aspect of the present invention, the permeation step is performed until the water stop agent supplied in the immediately preceding water stop agent supply step completes permeation into the covered electric wire, or a predetermined time after the permeation completion. It can be continued until after elapse.

  Further, as an aspect of the present invention, in the water-stopping agent supply step after the permeation step, the supply start timing for supplying the water-stopping agent is set to a time after the elapse of a predetermined time after the end of the pressure difference generation in the previous permeation step. can do.

  Further, the present invention provides the one end of the covered electric wire produced by the method for producing a water-stopped electric wire, wherein the covered electric wire in which a conductor portion constituted by a plurality of strands is covered with an insulating covering material, and the barrel portion is crimped. It is the water stop electric wire comprised by the said terminal attached to and the water stop part formed in the said covered electric wire, It is characterized by the above-mentioned.

As an aspect of the present invention, the water stop portion can be formed of a water stop body having a predetermined length continuous in the longitudinal direction inside the covered electric wire.
In addition, as an aspect of the present invention, a plurality of the waterstops can be provided at appropriate intervals inside the covered electric wire.

  In addition, the present invention provides the covered electric wire in which the terminal is attached in a covered electric wire in which a conductor portion constituted by a plurality of strands is covered with an insulating covering material and a terminal is attached to at least one end by a barrel portion to be crimped A water-stopping agent supplying means for supplying a predetermined amount of the water-stopping agent to the one end, an ambient pressure of a portion to which the water-stopping agent is supplied, and a pressure inside the covered electric wire inside the insulating covering material A pressure difference generating means for generating a pressure difference therebetween and allowing the water blocking agent to penetrate into the covered electric wire, wherein the pressure difference generating means supplies the water stopping agent. The pressure difference is generated after the supply of the water stop agent by means is stopped.

  As an aspect of the present invention, the pressure difference generation timing for generating the pressure difference by the pressure difference generating means can be set after a predetermined time has elapsed after the water stopping agent supply stop by the water stopping agent supply means.

  Further, as an aspect of the present invention, the pressure difference generating means is used until the water stopping agent supplied immediately before by the water stopping agent supplying means is completely penetrated into the covered electric wire or after the completion of the penetration. It can be operated until a predetermined time has elapsed.

  As an aspect of the present invention, the supply start timing of the water-stopping agent by the water-stopping agent supply unit can be set after the elapse of a predetermined time after the occurrence of the pressure difference by the immediately preceding pressure difference generation unit.

  The terminal includes a connection terminal including a barrel part and a terminal connection part such as a female connector, a male connector, or a screw insertion hole, or a connection terminal constituted only by the barrel part.

  The water-stopping agent includes, for example, a liquid water-stopping agent such as liquid silicone rubber, a soft paste-like or gel-like water-stopping agent, and a one-component curable type, a two-component curable type, or a non-curable type. Including being a water-stopper.

The pressure difference generating means is in a state where the pressure inside the covered electric wire is lower than the vicinity of the portion where the water-stopping agent is supplied by sealing and depressurizing the end opposite to that supplying the water-stopping agent In order to infiltrate the pressure difference generating means and the water-stopping agent between the strands constituting the conductor part inside the covered electric wire, pressurize the area around the portion where the water-stopping agent is supplied, and the pressure inside the covered electric wire The pressure difference generating means for making the pressure higher than that.
The predetermined amount refers to an amount that can cover the wire constituting the conductor portion over the entire circumference with the water-stopping agent.

  According to this invention, the water stop electric wire from which the stable water stop performance is obtained can be provided.

  The water stop electric wire 1 of the present invention shown in FIG. 1 includes one end of the covered electric wire 40 formed by crimping the covered electric wire 40 in which a conductor portion 42 constituted by a plurality of strands 42 a is covered with an insulating coating 41 and the barrel portion 30. The crimp terminal 20 is attached to the inner surface of the covered electric wire 40a and the seal portion 10 is formed in the covered electric wire 40a.

FIG. 1 is an explanatory diagram for explaining a water-stopping wire 1 to which a crimp terminal 20 is attached. FIG. 1 (a) shows an overall plan view of the water-stopping wire 1, and FIG. 1 is an enlarged plan view of one end side X of FIG. 1, FIG. 1C is an enlarged side view of one end side X of the water stopping wire 1, and FIG. The figure is shown.
The seal portion 10 is formed of a seal body 11 having a predetermined length L that is continuous in the longitudinal direction D in the covered electric wire inside 40a.

  The water stop electric wire 1 will be described in detail. The water stop electric wire 1 is formed by covering a conductor portion 42 constituted by a plurality of strands 42a with an insulation coating 41, and a part of the insulation coating 41 at both ends. The crimp terminal 20 is attached to a portion where the conductor portion 42 having an appropriate length is exposed, and the seal portion 10 is formed in the covered electric wire inside 40a.

  In addition, although the said water stop electric wire 1 is equipped with the crimp terminal 20 at both ends, the conductor part 42 of the both ends of the covered electric wire 40 may be exposed, and the crimp terminal 20 may be provided only in one edge part. The crimp terminal 20 may be provided by exposing only the conductor portion 42 on the side to which the terminal 20 is attached.

  The crimp terminal 20 includes an insertion connection portion 21 that allows insertion of a connection member (not shown) on the distal end side (left side in FIG. 1) in the longitudinal direction D, and the barrel portion 30 on the proximal end side (right side in FIG. 1). I have. However, the crimp terminal is not limited to the above configuration, and may be a crimp terminal configured by a terminal connection portion such as a female connector or a male connector and the barrel portion, or a crimp terminal configured only by the barrel portion.

  The barrel portion 30 is disposed via a wire barrel portion 31 that crimps and crimps the conductor portion 42, and a region 32 that exposes the conductor portion 42 and the insulating coating 41 at a predetermined length behind the wire barrel portion 31. An insulation barrel portion 33 that crimps the vicinity of the end portion of the insulating coating 41 and crimps is integrally formed in this order.

  The seal portion 10 is filled with a fluid fluidity sealant 12 having a water-stopping property between the strands 42a of the covered electric wire 40a without any gap and hardened, and the longitudinal direction from the end of the insulating coating 41 of the covered electric wire 40 The seal body 11 is formed with a predetermined length L toward the base end side of D.

  In addition, the sealing agent which comprises a sealing body is not limited to the fluid sealing agent 12, What is necessary is just to have fluidity | liquidity and a water stop, the sealing agent which does not harden | cure which have butyl rubber etc. as a main component, and a gel-like sealing agent It may be.

Next, the water stopping wire manufacturing unit 100 for manufacturing the water stopping wire 1 described above will be described with reference to FIG. 2 showing a schematic configuration diagram of the water stopping wire manufacturing unit 100.
The water stopping wire manufacturing unit 100 includes a sealing agent dropping device 110 that drops a predetermined amount of the fluid sealing agent 12 on one end side X of the covered electric wire 40 to which the crimp terminal 20 is attached by crimping the barrel portion 30, and a fluidity. Pressure that causes a pressure difference between the ambient pressure of the portion to which the sealing agent 12 is supplied and the pressure inside the covered electric wire 40a, which is inside the insulating coating material, so that the fluid sealing agent 12 penetrates into the covered electric wire. It is comprised with the difference generator 120.

  The pressure difference generator 120 is configured to generate a pressure difference after the supply of the fluid sealant 12 by the sealant dropping device 110 is stopped, and the fluidity sealant 12 dropped just before by the sealant dropping device 110. However, it is set to operate until it is drawn into the covered electric wire inside 40a.

  Describing in detail the configuration of the water blocking wire manufacturing unit 100, the water blocking wire manufacturing unit 100 includes a sealing agent dropping device 110, a pressure difference generating device 120, and a controller 101 for controlling them.

  The sealing agent dropping device 110 monitors the periphery of the dropping portion where the fluid sealing agent 12 is dropped from the dropping nozzle 113 and the dropping nozzle 113 for dropping the fluid sealing agent 12 on a predetermined portion of the covered electric wire 40. The liquid level sensor 112 that detects the liquid level and the sealant dropping valve 111 that restricts the dropping of the fluid sealant 12 from the dropping nozzle 113 are configured.

  In addition, the predetermined part of the covered electric wire 40 where the predetermined amount of the fluid sealing agent 12 is dropped by the dropping nozzle 113 is the wire barrel part 31 and the insulation barrel part on the one end side X to which the crimp terminal 20 of the covered electric wire 40 is attached. 33.

  Further, the amount of the fluid sealing agent 12 dropped from the dropping nozzle 113 is set to 1 ml or less per drop, and a predetermined amount, that is, the amount of the fluid sealing agent 12 that spreads evenly over the cross section of the conductor portion 42 is applied a plurality of times. Although it is set to drop, a configuration in which a predetermined amount of the fluid sealing agent 12 is dropped by one drop may be used.

  The pressure difference generator 120 includes an insertion port 121a that allows insertion of the other end Y, which is opposite to the one end X of the covered electric wire 40 forming the seal body 11, and keeps the inside in a sealed state. And a vacuum pump 122 for reducing the pressure inside the sealed box 121.

The controller 101 of the water blocking wire manufacturing unit 100 configured as described above controls the sealing agent dropping device 110 and the pressure difference generating device 120.
Specifically, the controller 101 opens the sealing agent dropping valve 111 to drop the fluid sealing agent 12 from the dropping nozzle 113, and senses the liquid level of the dropped fluid sealing agent 12 with the liquid level sensor 112. When the dropping of the predetermined amount of the fluid sealing agent 12 is detected, the sealing agent dropping valve 111 is closed to control the dropping of the fluid sealing agent 12 from the dropping nozzle 113.

  Further, the controller 101 controls the pressure difference generator 120 to generate the pressure difference by operating the vacuum pump 122 of the pressure difference generator 120 after the dropping of the fluid sealant 12 by the sealant dropping device 110 is stopped. The pressure difference generation timing T for generating the difference is set to be after the dropping of the fluid sealing agent 12 by the sealing agent dropping device 110 is stopped.

  In addition, the controller 101 controls the vacuum pump 122 of the pressure difference generator 120 to operate until the fluid sealant 12 supplied immediately before by the sealant dropping device 110 has completely penetrated into the covered wire interior 40a. Yes.

  A manufacturing method for manufacturing the water-stopping wire 1 using the water-stopping wire manufacturing unit 100 controlled by the controller 101 in this manner will be described with reference to the timing chart shown in FIG.

  The water stop electric wire 1 of the present invention includes a sealing agent dropping step S for dropping the fluid sealing agent 12 on one end side X of the covered electric wire 40 to which the crimp terminal 20 is attached, and the fluid sealing agent 12 inside the covered electric wire 40a. And the sealing agent permeation step P that is permeated into the sealing agent, and the sealing agent dripping step S and the sealing agent permeation step P are alternately repeated.

  In addition, the sealing agent dripping process S is a process of dripping the fluid sealing agent 12 to the one end side X of the covered electric wire 40 using the above-described sealing agent dropping apparatus 110, and the sealing agent permeating process P is the pressure described above. Using the difference generator 120, a pressure difference is generated between the ambient pressure of the portion where the fluid sealing agent 12 is dropped and the pressure inside the covered electric wire 40 a, and the dropped fluid sealing agent 12 is placed inside the covered electric wire. This is a step of permeating into 40a, that is, drawing.

  The sealing agent permeation step P is set to be executed after the end of the sealing agent dropping step S in which the dropping of the predetermined amount of the fluid sealing agent 12 ends in the sealing agent dropping step S, and the immediately preceding sealing agent It is the structure which continues until the fluid sealing agent 12 dripped by dripping process S completes the penetration | invasion to the inside of a covered electric wire 40a.

  The manufacturing method of the water stop electric wire 1 will be described in detail. First, with a terminal mounting device (not shown), the barrel portion 30 is crimped to the end portion of the covered electric wire 40 from which the insulating coating 41 of a predetermined length is peeled, and the crimp terminal 20 is pressed. In the covered electric wire 40 to which the crimp terminal 20 is attached at the end, the one end side X forming the seal portion 10 is the sealing agent dropping device 110, and the other end side Y which is the opposite side is the pressure difference generating device 120. Insert and set inside sealed box 121.

  In this state, as shown in the timing chart of FIG. 3A, when the start switch (start SW) of the water stop wire manufacturing unit 100 is turned on, first, the controller 101 starts the sealing agent dropping valve of the sealing agent dropping device 110. 111 is opened and control is performed so that the fluid sealant 12 is dropped from the dropping nozzle 113 (start of the sealing agent dropping step S).

  3A to 3C are the timing charts in order from the top, the start SW of the water-stopping wire manufacturing unit 100, the dropping of the fluid sealant 12 by the dropping nozzle 113, and the vacuum pump 122 by the pressure difference generator 120. The operation of is shown.

  When the liquid level sensor 112 confirms that a predetermined amount of the fluid sealant 12 has been dropped, the controller 101 closes the sealant dropping valve 111 and stops dropping the fluid sealant 12 from the dropping nozzle 113. (End of sealant dropping step S).

  In this embodiment, the liquid level sensor 112 confirms the dripping of a predetermined amount of the fluid sealant 12 and stops dropping the fluid sealant 12 from the dripping nozzle 113. Even without using the sensor 112, the dropping amount of the fluid sealing agent 12 dropped from the dropping nozzle 113 is set in advance so as to be the above-mentioned predetermined amount, and the fluid sealing agent 12 of the set dropping amount is dropped. May be.

  The controller 101 that has controlled the dripping stop of the fluid sealant 12 operates the vacuum pump 122 of the pressure difference generator 120 to depressurize the inside of the sealed box 121, thereby the other end of the covered electric wire 40 inserted into the sealed box 121. The pressure inside the covered electric wire 40a is reduced by reducing the pressure inside the covered electric wire 40a communicating with the sealed box 121 through the end of the side Y (pressure difference generation timing T in the sealing agent permeation step P).

  In this way, the pressure inside the covered electric wire 40a is lower than the pressure around the one end X of the covered electric wire 40 to which the fluid sealing agent 12 is supplied due to the decrease in the pressure inside the covered electric wire 40a. The dropped fluid sealant 12 penetrates between the strands 42a and is drawn toward the other end Y.

  The liquid level sensor 112 monitoring the penetration of the fluid sealant 12 detects that most of the fluid sealant 12 dropped in the immediately preceding sealant dropping step S has been drawn into the covered electric wire interior 40a. Then, the liquid level sensor 112 transmits detection result information to the controller 101, and the controller 101 that has received the detection result information stops the operation of the vacuum pump 122 of the pressure difference generator 120 (sealing agent permeation process P ends).

  In the present embodiment, the operation of the vacuum pump 122 of the pressure difference generator 120 is stopped by detecting the drawing of the fluid sealant 12 into the covered electric wire 40a by the liquid level sensor 112. The operation time of the vacuum pump 122 of the difference generator 120 may be set, and the vacuum pump 122 may be operated for the set operation time.

  The controller 101 that has stopped and controlled the pressure difference generator 120 controls the dropping of the fluid sealing agent 12 to the sealing agent dropping device 110 again, and repeats the sealing agent dropping step S and the sealing agent permeation step P. As shown to (d), the seal | sticker part 10 by the seal body 11 formed in predetermined length L with which it filled between the strands 42a in the covered electric wire inside 40a is formed.

  As shown in FIG. 3A, the operation time of the vacuum pump 122 in the second and subsequent sealing agent infiltration processes P is gradually increased because the pulling load increases as the length of the sealing body 11 to be pulled increases. It is getting longer.

  Thus, the sealant dropping step S for dropping the fluid sealing agent 12 on the one end side X of the covered electric wire 40 to which the crimp terminal 20 is attached in the terminal attachment step, and the portion where the fluid sealing agent 12 is dropped. A stop composed of a sealing agent permeation step P that creates a pressure difference between the ambient pressure and the pressure inside the covered electric wire 40a, which is inside the insulating coating 41, and allows the fluid sealant 12 to penetrate into the covered electric wire inside 40a. Since the sealing agent dropping step S and the sealing agent permeation step P are alternately repeated in the method for manufacturing the water electric wire 1 and the water blocking wire manufacturing unit 100 manufactured by the manufacturing method, between the strands 42a of the covered electric wire inside 40a. The sealing part 10 can be comprised with the filled sealing body 11, and the water stop electric wire 1 which has reliable water stop can be obtained.

  Further, in forming the seal portion 10, since the seal body 11 having a predetermined length L is formed by repeating the seal agent permeation process P and the seal agent dropping process S, excessive pressure in the seal agent permeation process P is formed. Without being added to the fluid sealant 12. For this reason, for example, the material separation of the fluid sealant 12 due to an excessive pressure difference and the generation of voids inside the seal body 11 can be prevented, and the denser and high water-stop seal portion 10 can be configured. it can.

  Moreover, since the sealing agent permeation step P is started after the end of the sealing agent dropping step S in which the dropping of the predetermined amount of the fluid sealing agent 12 ends in the sealing agent dropping step S, the fluid sealing agent 12 There is no pressure difference when dropped. That is, after the fluid sealant 12 uniformly permeates the radial cross section of the conductor portion 42 in the sealant dripping step S, a pressure difference is generated in the sealant permeation step P so that the fluid sealant 12 is placed inside the covered electric wire. Since it is drawn into 40a, the seal portion 10 having a uniform seal structure can be formed in the covered electric wire inside 40a. Thereby, the stable sealing performance is securable.

  Managing the time of the sealing agent penetration step P by continuing the sealing agent penetration step P until the fluid sealing agent 12 dropped in the immediately preceding sealing agent dropping step S has completely penetrated into the covered electric wire interior 40a. The process work can be made more efficient.

  More specifically, one end of the covered electric wire 40 is manufactured by the above-described method of manufacturing the water-stopping electric wire 1, the covered electric wire 40 is formed by covering the conductor portion 42 constituted by the plurality of strands 42 a with the insulating coating 41, and the barrel portion 30 is crimped. The water stop electric wire 1 provided with the crimp terminal 20 attached to and the seal portion 10 formed in the covered electric wire inside 40a can ensure stable sealing performance.

  Moreover, since the sealing part 10 is formed with the sealing body 11 having a predetermined length L continuous in the longitudinal direction D in the covered electric wire inside 40a, the water stopping electric wire 1 having a reliable sealing performance can be configured.

  In addition, as shown in FIG.3 (b), the predetermined amount which the fluid sealing agent 12 dripping in the sealing agent dripping process S is increased (the dripping time of the fluid sealing agent 12 by the sealing agent dripping apparatus 110 is lengthened). As a result, the operating time of the vacuum pump 122 of the pressure difference generator 120 in the sealing agent permeation process P also becomes longer, whereby a more precise seal body 11 can be formed.

  In addition, as shown in FIG. 3 (c), in the sealing agent permeation process P, the pressure difference generation timing T for generating the pressure difference is set after a predetermined time has elapsed since the supply of the fluid sealing agent 12 was stopped in the sealing agent dripping process S. Can be set. That is, by setting the time lag R for a predetermined time after the dropping of the fluid sealing agent 12 in the sealing agent dropping step S, the fluid sealing agent 12 dropped on the conductor portion 42 penetrates into the strand 42a. The uniform sealing body 11 can be formed in the cross-sectional direction of the conductor portion 42.

  Specifically, by setting a time lag R of a predetermined time between the sealing agent dropping step S and the sealing agent permeation step P, a sufficient time for the fluid sealing agent 12 to permeate between the plurality of strands 42a is secured, and the flow The sealant 12 can penetrate uniformly in the radial cross section, and the seal portion 10 having a uniform seal structure can be formed in the covered electric wire inside 40a. Thereby, the more stable sealing performance is securable.

  It is particularly useful when using a highly viscous water-stopping agent. The time lag R is set within 30 seconds considering the curing time of the fluid sealant 12, and is preferably within 1 to 10 seconds from the viewpoint of shortening the process time.

  Further, as shown in FIG. 3D, after the sealing agent permeation step P is completed, that is, after the vacuum pump 122 is stopped, during the supply start timing T ′ of the fluid sealing agent 12 in the sealing agent dropping step S, A time lag R ′ may be set.

  In this way, after the vacuum pump 122 is stopped, the time lag R ′ is set before the dropping start timing T ′ of the fluid sealing agent 12 in the sealing agent dropping step S, that is, the dropping start timing T of the fluid sealing agent 12. 'By stopping the operation of the vacuum pump 122 earlier, it is possible to prevent an excessive suction state from occurring.

  Specifically, since the inside of the covered electric wire 40a does not recover to atmospheric pressure immediately after the vacuum pump 122 is stopped, the fluid sealant 12 may be excessively drawn into the covered electric wire inside 40a. By operating the pump 122 and then setting the time lag R ′, the dropped fluid sealant 12 can be drawn in a desired drawing state, and a more uniform and uniform sealing body 11 is formed in the cross-sectional direction. can do.

Furthermore, as shown to Fig.4 (a), you may comprise the seal | sticker part 10a with the seal body 11 arrange | positioned by the suitable space | interval d in the covered electric wire inside 40a.
In this case, the vacuum pump 122 is operated until the fluid sealing agent 12 supplied immediately before by the water-stopping agent supply means has completely penetrated into the covered electric wire inside 40a and a predetermined time has elapsed after completion of the penetration. Thus, it is possible to manufacture the water-stopping wire 1a provided with the seal portion 10a constituted by the plurality of seal bodies 11.

  FIG. 4 (a) showing a cross-sectional view of the water-stopping wire 1a, and FIG. 4 (b) showing a time chart produced by the water-stopping wire 1a, for the water-stopping wire 1a provided with the seal portion 10a constituted by a plurality of seal bodies 11. In detail, the water-stopping wire 1a forms a seal portion 10a with a plurality of seal bodies 11 arranged at an appropriate interval d in the covered wire inside 40a.

  As shown in the time chart of FIG. 4B, when the start switch (start SW) of the water stop wire manufacturing unit 100 is turned on, first, similarly to the manufacturing method for manufacturing the water stop wire 1 described above, the controller 101. Thus, the dropping of the fluid sealing agent 12 is started from the dropping nozzle 113 of the sealing agent dropping device 110. When the dropping of the predetermined amount of the fluid sealant 12 is completed, the vacuum pump 122 of the pressure difference generator 120 is operated. That is, after the sealing agent dropping step S is completed, the sealing agent penetration step P is started.

  And this sealing agent penetration | infiltration process P, ie, the operating time of the vacuum pump 122 of the pressure difference generator 120, is set longer than the operating time in the case of the said water stop electric wire 1 (it shows with a dotted line in FIG.4 (b)). By doing so, all of the fluid sealing agent 12 dropped by a predetermined amount in the immediately preceding sealing agent dropping step S is drawn into the covered electric wire inside 40 a and further drawn into the other end Y of the covered electric wire 40.

  Thus, after completing the sealing agent penetration step P set longer than the sealing agent penetration step P of the above-described water-stopping wire 1, the sealing agent dropping step S is started again, and the sealing agent penetration step P set longer is performed. By repeating, the water stop electric wire 1a provided with the seal part 10a comprised by the some seal body 11 arrange | positioned at appropriate intervals d can be comprised.

In this way, the seal portion 10a includes a portion where the seal body 11 is not provided between the seal body 11 and the seal body 11, that is, a portion having an appropriate distance d in FIG. The vicinity of the end portion of the attached covered electric wire 40 may be bent by an external force that occurs unexpectedly, for example, when the crimp terminal 20 is attached to another component. Can prevent damage.
Moreover, the sealing performance of the seal part 10 can be compensated for by providing the plurality of seal bodies 11.

  Moreover, in the manufacturing method of the water stop electric wire 1a, the said fluid sealant 12 supplied by the said sealing agent dripping process S in the sealing agent penetration | infiltration process P completes osmosis | permeation in the said covered electric wire inside 40a, and the penetration | infiltration By continuing until a predetermined time has elapsed after completion, the seal body 11 in which an air layer is interposed between the seal body 11 and the fluid sealant 12 to be supplied next can be formed. For this reason, in the fluid sealing agent 12 that is cured by moisture in the air, the fluid sealing agent 12 is uniformly cured, and the water stopping wire 1a that can ensure stable sealing performance can be configured.

Here, the sealing agent penetration step P is performed by applying a vacuum with a vacuum pump 122 to a sealed box 121 in which the other end Y of the covered wire 40 is sealed, so that the covered wire 40 in which the fluid sealant 12 has been dropped. A configuration is shown in which a pressure difference is generated between the pressure around the one end side X and the pressure inside the covered electric wire 40a so that the fluid sealant 12 penetrates into the wire 42a without any gap. However, one end side X of the covered electric wire 40 is sealed, and the pressure around the covered electric wire inside 40a is generated by improving the surrounding pressure where the fluid sealing agent 12 is dropped. It may be configured to permeate.
Further, the closed box 121 in the pressure difference generator 120 may be provided with an open valve for restoring the atmospheric pressure in the closed box 121 to about atmospheric pressure at the same time as the operation of the vacuum pump 122 is stopped.

  Moreover, in the said Example, although it was the structure which detects the predetermined amount of the fluid sealing agent 12 dripped with the liquid level sensor 112 which is not shown in figure, per 1 drop of the fluid sealing agent 12 dripped from the dripping nozzle 113 The structure controlled by the amount of dripping and the number of times of dripping may be sufficient. In this case, it is not necessary to equip the liquid level sensor 112, and the apparatus cost can be reduced.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The insulating coating material of the present invention corresponds to the insulating coating 41,
Similarly,
The terminal corresponds to the crimp terminal 20,
The water-stop agent supply step corresponds to the sealant dropping step S,
The penetration process corresponds to the sealing agent penetration process P,
The water stop agent corresponds to the fluid sealant 12,
After a predetermined time of the supply stop of the water stop agent, it corresponds to the time lag R,
The water stop part corresponds to the seal part 10, 10a,
The waterstop corresponds to the seal body 11,
The appropriate interval corresponds to the interval d,
The water-stop agent supply means corresponds to the sealant dropping device 110,
The pressure difference generating means corresponds to the pressure difference generating device 120,
The manufacturing apparatus corresponds to the water stop wire manufacturing unit 100,
After a lapse of a predetermined time after the occurrence of the pressure difference, it corresponds to the time lag R ′,
Although the supply start timing is the dropping start timing T ′, the present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

Explanatory drawing explaining the water stop electric wire to which the crimp terminal was attached. The schematic block diagram of a water stop electric wire manufacturing unit. The timing chart of the manufacturing method which manufactures a water stop electric wire manufacturing unit. Explanatory drawing about the water stop electric wire provided with the water stop part comprised with a some water stop body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a ... Water stop electric wire 10, 10a ... Seal part 11 ... Seal body 12 ... Fluid sealant 20 ... Crimp terminal 30 ... Barrel part 31 ... Wire barrel part 33 ... Insulation barrel part 40 ... Covered electric wire 40a ... Covered electric wire Inner 41 ... Insulation coating 42 ... Conductor portion 42a ... Wire 100 ... Water blocking wire manufacturing unit 110 ... Sealing agent dropping device 120 ... Pressure difference generator S ... Sealing agent dropping step P ... Sealing agent penetration step d ... Interval R, R '... Time lag X ... One end side D ... Longitudinal direction L ... Predetermined length T ... Pressure difference occurrence timing T' ... Drip start timing

Claims (12)

In a covered electric wire in which a conductor portion composed of a plurality of strands is covered with an insulating covering material and a terminal is attached to at least one end by a barrel portion to be crimped, water is stopped at the one end of the covered electric wire to which the terminal is attached. A water-stop agent supply process for supplying the agent;
A pressure difference is generated between the ambient pressure of the portion to which the water-stopping agent is supplied and the pressure inside the covered electric wire inside the insulating coating material, and the water-stopping agent penetrates into the inside of the covered electric wire. A method for producing a water-stop electric wire comprising an infiltration step,
The manufacturing method of the water stop electric wire which repeats the said water stop agent supply process and the said osmosis | permeation process alternately. The infiltration step,
The method for manufacturing an electric wire according to claim 1, wherein the method is started after the water-stopping agent supply step is completed, in which the supply of a predetermined amount of the water-stopping agent is ended in the water-stopping agent supply step. In the infiltration step, the pressure difference generation timing for generating the pressure difference is
The manufacturing method of the water stop electric wire of Claim 2 made it after the predetermined time progress of the supply stop of the said water stop agent in the said water stop agent supply process. The infiltration step,
The said water-stopping agent supplied in the immediately preceding water-stopper supplying step is continued until completion of penetration into the inside of the covered electric wire or after a predetermined time has elapsed after completion of the penetration. The manufacturing method of the water stop electric wire of description. In the water-stop agent supply step after the permeation step, supply start timing for supplying the water-stop agent,
The method for manufacturing a water stop electric wire according to any one of claims 1 to 4, wherein a predetermined time elapses after the end of the pressure difference generation in the immediately preceding infiltration step. Manufactured by the method for producing a water-stopped electric wire according to any one of claims 1 to 5,
The covered electric wire in which a conductor portion constituted by a plurality of strands is covered with an insulating covering material; and
The terminal attached to one end of the covered electric wire by crimping the barrel portion;
The water stop electric wire comprised with the water stop part formed in the said covered electric wire inside. The water stop part,
The water stop electric wire according to claim 6, which is formed of a water stop body having a predetermined length continuous in the longitudinal direction inside the covered electric wire. The waterstop,
The waterproof electric wire according to claim 7, wherein a plurality of the insulated electric wires are provided at an appropriate interval inside the covered electric wire. In a covered electric wire in which a conductor portion constituted by a plurality of strands is covered with an insulating covering material, and a terminal is attached to at least one end by a barrel portion to be crimped, a predetermined amount is applied to the one end of the covered electric wire to which the terminal is attached Water-stopping agent supplying means for supplying a water-stopping agent of
A pressure difference is generated between the ambient pressure of the portion to which the water-stopping agent is supplied and the pressure inside the covered electric wire inside the insulating coating material, and the water-stopping agent penetrates into the inside of the covered electric wire. A device for producing a water stop electric wire comprising a pressure difference generating means,
The pressure difference generating means is
An apparatus for manufacturing a water stop electric wire that generates the pressure difference after the supply of the water stop agent by the water stop agent supplying means is stopped. The pressure difference generation timing for generating the pressure difference by the pressure difference generating means,
The manufacturing apparatus of the water stop electric wire of Claim 9 set after progress for the predetermined time after the supply stop of the said water stop agent by the said water stop agent supply means. The pressure difference generating means;
11. The operation according to claim 9, wherein the water stopping agent supplied immediately before by the water stopping agent supplying means is operated until the penetration into the covered electric wire is completed, or until a predetermined time has elapsed after the completion of the penetration. Equipment for producing water-stopping electric wires. The supply start timing of the water stop agent by the water stop agent supplying means is
The method for producing a water stop electric wire according to claim 9, 10 or 11, wherein a predetermined time has elapsed after generation of the pressure difference by the immediately preceding pressure difference generating means.

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