JP4772333B2 - Water stop suction device - Google Patents

Description

  The present invention relates to a technique for performing a water stop treatment on an in-vehicle electric wire mounted on a vehicle.

  Some of the on-vehicle electric wires are required to have high waterproof properties. For example, a grounding wire for connecting an electric circuit provided in a vehicle or the like to a grounding terminal is connected to a suitable grounding part (for example, a vehicle body) with the grounding terminal fixed to the terminal exposed to the outside. Therefore, moisture easily enters from the terminal, and when the moisture enters the circuit through the inside of the covering material, there is a possibility that normal operation of the circuit is hindered.

Therefore, as a method for performing a water-stopping treatment for such an in-vehicle electric wire including the grounding electric wire, Patent Document 1 molds a high-viscosity sealing resin so as to cover the electric wire terminal to which the earth connection terminal is fixed. It is disclosed.
Japanese Patent Laying-Open No. 2001-167821 (page 4, FIG. 4)

  In the method of molding the resin around the wire terminal as described above, in addition to requiring labor and large equipment for the molding, the wire terminal is bulky, making wiring work difficult. For example, other ground connection terminals There is a drawback that it is impossible to superimpose.

  An object of this invention is to perform the water stop process of a vehicle-mounted electric wire reliably by simple operation, without significantly increasing the volume of an electric wire terminal part in view of such a situation.

  In order to solve the above problems, the present inventor supplies air to the other end of the in-vehicle electric wire by sucking and reducing the air inside the covering material of the in-vehicle electric wire from one end of the in-vehicle electric wire. The present inventors have conceived a water-stopping treatment method in which a water-stopping agent having fluidity is allowed to penetrate inside the coating material.

  According to this water-stopping treatment method, the water-stopping agent can be infiltrated into the inside of the covering material, so that the water channel inside the covering material of the in-vehicle electric wire can be surely changed without substantially changing the volume of the wire end portion. It is possible to prevent moisture from entering the on-vehicle circuit.

  However, during the pressure reducing operation as described above, it is necessary to adjust the suction pressure in order to adjust the penetration amount of the water-stopping agent according to the type (for example, cross-sectional area) of the in-vehicle electric wire. If the suction pressure is adjusted using a different suction source for each set pressure, the equipment cost becomes high.

Therefore, the present invention has a fluidity supplied to one end of the in-vehicle electric wire in order to perform a water stop treatment on the in-vehicle electric wire mounted on the vehicle, which is an electric wire having a coating material outside the conductor. A water-stop suction device that sucks the other end of the in-vehicle electric wire so that the water-stopping agent penetrates into the inside of the covering material and depressurizes the inside of the covering material, and the other end of the in-vehicle electric wire A water-stop suction tool that forms a plurality of decompression chambers that can be hermetically sealed, a suction source that is connected in common to each of the decompression chambers and that can decompress each decompression chamber, and the suction source and each decompression chamber And a pressure adjusting unit that individually adjusts the pressure in each decompression chamber when the air is sucked by the suction source for each decompression chamber . A base formed with a recess capable of accommodating the other end of the electric wire. A lid that forms the decompression chamber and the decompression chamber are formed by detachably closing the recess while sandwiching the middle portion of the in-vehicle electric wire in which the other terminal is accommodated in the recess. There is provided a water-stop suction device , comprising: a pressing unit that presses the lid body in a posture toward a base side .

  According to the present invention, the pressure adjustment unit provided between each of the plurality of decompression chambers and the suction source individually sets the set pressure for each decompression chamber while using a common suction source for each decompression chamber. Since it can be adjusted, the equipment can be simplified as compared with the case where a suction source is provided for each decompression chamber, thereby reducing the equipment cost.

  Furthermore, in the present invention, it is possible to simultaneously suck air from the other terminal of the plurality of in-vehicle electric wires sealed and held in the decompression chamber by decompressing each decompression chamber by the suction source, In this case, workability can be improved as compared with the case where a plurality of in-vehicle electric wires are individually decompressed.

  Therefore, in the water-stop suction device of the present invention, it is possible to perform a pressure reduction process under pressure reduction conditions suitable for a plurality of different types of vehicle-mounted electric wires while reducing the equipment cost.

Further, the water stop suction tool according to the present invention includes a base in which a concave portion capable of accommodating the other end of the in-vehicle electric wire is formed, and an intermediate portion of the in-vehicle electric wire in which the other end is accommodated in the concave portion. And a lid that forms the decompression chamber by detachably closing the recess while clamping the portion.

Therefore, since the decompression chamber can be formed by attaching a lid to the base, the water-stop suction tool can have a relatively simple configuration.

Furthermore, the suction tool for water stop according to the present invention includes pressing means for pressing the lid body in a posture to form the decompression chamber to the base side.

Therefore, since the base and the lid can be more reliably brought into close contact with each other by the pressing means, the airtight performance of the decompression chamber can be improved, thereby reducing the required power of the suction source.

  In addition, although the kind and arrangement | positioning location of the said vehicle-mounted electric wire are not specifically limited, As a preferable thing, the electric wire for earthing for connecting the circuit mounted in a vehicle to earth | ground is mentioned.

  According to this configuration, since the water stop treatment can be performed on the grounding wire, the ground is generally connected to the ground disposed at a location (for example, the body of the vehicle) that is easily affected by the external environment of the vehicle. It is possible to prevent moisture from entering from the terminal of the electric wire to the opposite terminal.

  However, the water-stop suction device according to the present invention is not limited to the grounding wire, and, for example, moisture can easily enter the coating material, such as a splice wire from which the coating material is peeled off in the middle of the wire. Even if the connector is provided with a waterproof function, the connector itself can be suitably used for a circuit connected to a circuit that requires a particularly high waterproof property.

  Preferably, the water stop suction device includes a plurality of water stop suction tools, and a decompression chamber is formed in each water stop suction tool.

  According to this configuration, when the water stop treatment is necessary in a plurality of processes in the manufacturing process, the water stop suction tool can be used properly for each process, and each of the decompression chambers of the water stop suction tool is provided. The pressure can be reduced with a common suction source.

  Moreover, in the said structure, since the suction tool for water stop can also be used properly according to the kind of vehicle-mounted electric wire, for example, in the state which matched the pressure reduction conditions corresponding to this kind of vehicle-mounted electric wire, and this kind reliably The decompression process can be executed by the operator.

  In the water stop suction device, it is preferable that a plurality of decompression chambers are formed in a common water stop suction tool.

  According to this configuration, since a plurality of types of in-vehicle electric wires can be depressurized using a common water stop suction tool, for example, a plurality of in-vehicle electric wires are pressure-bonded to a common terminal, so-called When pressure-reducing treatment is performed on a common crimping wire, a plurality of in-vehicle electric wires crimped to the common crimping wire can be decompressed at the same time. Can be further improved.

  In the water stop suction device, it is preferable that the water stop suction tool includes an electric wire detection means for detecting whether or not the in-vehicle electric wire is held in the decompression chamber.

  According to this configuration, since it is possible to detect whether or not the in-vehicle electric wire is held in the decompression chamber, it is possible to suppress the occurrence of idle operation due to forgetting to install the in-vehicle electric wire using this detection result. Can do.

  In the water stop suction device, it is preferable that the water stop suction tool includes pressure detection means for detecting a pressure in the decompression chamber.

  According to this configuration, since the pressure in the decompression chamber can be detected, the detection result is used to suppress the decompression process from being performed in a state where the decompression chamber is in an inappropriate pressure environment. Can do.

  According to the present invention, it is possible to reliably perform the water stop treatment of the in-vehicle electric wire by a simple operation without significantly increasing the volume of the electric wire terminal portion.

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

  As shown in FIGS. 2 and 3, the water-stop suction device of the present embodiment includes three water-stop suction tools 1, a control unit 20, a display unit 21, a suction pump P, and a regulator R. It is configured in combination with the control box 22 and is used to perform a water stop treatment of the grounding electric wire 40 as shown in FIGS.

  The grounding wire 40 is an insulated wire having a covering material 42 around a conductor 41, and a ground connection terminal 50 is fixed to one end of the conductor 41, and a connector connection terminal T (see FIG. 3) is fixed to the other end. Has been. The illustrated ground connection terminal 50 is formed of a single metal plate, and integrally includes a ground connection portion 51 connected to a vehicle body ground, a conductor barrel 52 and an insulation barrel 53. The ground connection portion 51 is provided with a bolt insertion hole 51a through which a bolt (not shown) can be inserted, and is electrically connected to the bolt (that is, connected to the body ground).

  FIGS. 1A and 1B show an example in which the grounding wire 40 and the ground connection terminal 50 are crimped in a one-to-one relationship. However, as shown in FIG. Also known is a so-called common crimp line in which a plurality (two in the figure) of grounding wires 40a and 40b are crimped to the connection terminal 50. It can be suitably used for water-stopping treatment of common crimping lines. In the illustrated common crimp line, the cross-sectional areas of the grounding wires 40a and 40b are set to different cross-sectional areas.

  As shown in FIGS. 2 to 5, each of the water stop suction tools 1 has a specific portion (FIG. 5) of one end of the grounding wires 40, 40 a, 40 b (hereinafter collectively referred to as a grounding wire 40). The other end of the grounding wire 40 is sucked in order to allow the water-stopping agent having fluidity supplied to the first A arrow portion) to penetrate inside the covering material 42.

  Specifically, each water-stop suction tool 1 forms one decompression chamber S between the base 2 and the lid 3, and two earthing wires 40 sealed in the decompression chamber S are provided. About the other terminal, the inside of the covering 42 is depressurized. In response to this pressure reduction, the water-stopping agent having fluidity supplied to the arrow A portion of the one end of each ground wire 40 permeates the inside of the covering material 42, and the water channel in each ground wire 40. Will be cut off.

  A common suction pump P is connected to each of the water stop suction tools 1 via an individual regulator R. As a result, the water-stop suction device can decompress the interior of each decompression chamber S with the common suction pump P after individually setting the suction pressure for each decompression chamber S with the regulator R.

  In this way, in the water stop suction device, since the pressure reducing conditions different for each pressure reducing chamber S can be set by the regulator R, a plurality of grounding wires 40 of different types (for example, cross-sectional areas) are decompressed. Even if it is a case, after setting it as the pressure reduction conditions suitable for the kind of the said electric wire 40 for earth | grounding, the three types of electric wires 40 for earthing | grounding can be collectively pressure-reduced.

  Specifically, the water-stop suction tool 1 includes a base 2 having a recess 4 that opens upward, a lid 3 having a surface area capable of closing the recess 4, and the lid 3 as a base 2. And a clamp (pressing means) 5 having a support shaft 5a that is supported so as to be swingable, and a closed position (the solid line in FIG. 2) closes the opening of the recess 4 in response to the swing operation of the clamp 5. 2) and the open position (indicated by a two-dot chain line in FIG. 2) where the recess 4 is opened, the lid 3 is swingable about the support shaft 5a.

  The base 2 includes a substantially rectangular main body block 6, a rubber packing (elastic member) 7 attached to the main body block 6, a holding portion 8, a pressure sensor (pressure detecting means) 9, and a port portion 10. Yes. In the following description, it is assumed that the side on which the holding portion 7 is disposed is assumed to be the front (side on which the operator is located).

  A pair of left and right accommodation holes 17 are formed in the main body block 6 so as to be inclined forward. Each accommodation hole 17 has a cross-sectional area and an opening shape into which the other end of the grounding wire 40 to which the connector connecting terminal T is crimped can be inserted one by one. In addition, since each housing hole 17 is inclined, when the grounding wire 40 is inserted into the housing hole 17 from the front, the grounding wire 40 is slid along the slope of each housing hole 17. And can be inserted smoothly.

  A rubber packing 7 is fixed to the upper surface of the main body block 6 so as to collectively surround the openings of the receiving holes 17 (see FIG. 5: in the region on the wall 18 between the receiving holes 17, The rubber packing 7 is not installed).

  The holding portion 8 includes a wire guide 11 having a pair of left and right slits 11a (see FIG. 3) capable of holding one middle portion of each grounding wire 40 in which a terminal is inserted into each receiving hole 17 one by one. A pair of left and right detection sensors (wire detection means) 12 disposed between the wire guide 11 and the main body block 6 are provided.

  As shown clearly in FIG. 3, each of the detection sensors 12 is formed in a gate shape that opens upward, and each of the grounding wires spanned between the body block 6 and the wire guide 11 (slit 11a). The middle part of 40 can be detected individually.

  A pair of the pressure sensors 9 are provided corresponding to the respective receiving holes 17, and the inside of each receiving hole 17 through a pair of holes 13 (one is shown in FIG. 2) formed in the main body block 6. Each pressure can be detected. In the present embodiment, a pair of pressure sensors 9 is provided, but either one of the pressure sensors 9 may be omitted.

  A pair of the port portions 10 are provided corresponding to the respective accommodation holes 17, and one end portion thereof communicates with the inside of each accommodation hole 17 through a hole 14 formed in the main body block 6, and the other end portion thereof. The part is connected to the decompression pump P through a common regulator R (see FIG. 5). In the present embodiment, a pair of port portions 10 are provided, but either one of the port portions 10 may be omitted.

  On the other hand, the lid 3 includes a plate 15 whose back surface is attached to the clamp 5, and a rubber packing (elastic member) 16 fixed to the surface of the plate 15. When the lid 3 is in the closed position, the rubber packing 16 is in an airtight state between the rubber packing 7 and the rubber packing 7 while sandwiching the middle portion of each grounding wire 40 with the rubber packing 7. It comes to form. That is, the rubber packings 7 and 16 can be elastically deformed along the outer shape of the grounding wire 40 when the intermediate portion of the grounding wire 40 is clamped between the lid 3 and the base 2. Thus, for example, it is formed of a material having relatively high elasticity, such as urethane foam (where the bubble portions are discontinuous), silicone rubber, or silicone gel.

  The clamp 5 is a well-known clamp using a toggle mechanism, and is provided at a rear portion on the main body block 6.

  The clamp 5 further presses the lid 3 toward the main body block 6 when the lid 3 is swung to the closed position. The rubber packings 7 and 16 are elastically deformed and brought into close contact with each other according to the pressing force, whereby a decompression chamber S is defined between the lid 3 and the main body block 6 that are in the closed position. Specifically, the decompression chamber S is a space in both the accommodation holes 17 and the through holes 7a and is closed with the lid 3 as a top plate.

  Thus, in the water stop suction tool 1, the decompression chamber S can be partitioned by the swinging operation of the clamp 5, so that the workability of the water stop process for the ground wire 40 can be further improved.

  The pressure sensor 9, the detection sensor 12, the display unit 21, and the regulator R are electrically connected to the control unit 20 in the control box 22.

  The control unit 20 is a well-known unit including a CPU that executes various arithmetic processes, a ROM that stores initial settings and the like, a RAM that stores setting information and the like input by an input unit (not shown) so as to be overwritten. The input unit also has a function of inputting an instruction to start or stop decompression.

  The control unit 20 controls the driving of the suction pump P in response to the input of the decompression start instruction from the input unit, and starts or stops the decompression by the adjustment pressure of the regulator R. ing. The regulator R can adjust the suction pressure with respect to the decompression chamber S by the suction pump P by an adjustment knob (not shown).

  The control unit 20 detects the pressure in the decompression chamber S by the pressure sensor 12 and displays the detected value on the display unit 21.

  Therefore, for example, when the pressure in the decompression chamber S is higher than a preset reference negative pressure (positive pressure side), the operator checks the display unit 21 to check the negative pressure in the decompression chamber S. Therefore, it is possible to suppress the decompression process in the state where the decompression chamber S is in an inappropriate pressure environment.

  In addition, although the control part 20 of this embodiment displays the detection value by the said pressure sensor 12 on the display part 21, it calculates the difference of the said detection value and the said reference negative pressure, and this difference is beforehand calculated | required. When the reference value is larger than the set reference value, it is possible to notify the operator by a not-shown notification means (buzzer, lamp, etc.) or to stop the suction pump P, or the regulator corresponding to the difference It is also possible to feedback control the adjustment pressure of R. When executing this feedback control, for example, an electromagnetic valve may be employed for the regulator R.

  Further, based on the detection result of each detection sensor 12, the control unit 20 displays on the display unit 21 whether or not the grounding electric wire 40 is set in each accommodation hole 17.

  Therefore, for example, when only one grounding wire 40 is mounted (when the other grounding wire 40 is forgotten to be mounted), the operator checks the display unit 21 to It is possible to recognize that the number of the grounding wires 40 is insufficient, and thus it is possible to suppress the occurrence of an idle operation due to forgetting to attach the grounding wires 40.

  In addition, although the control part 20 of this embodiment displays the detection result of the said detection sensor 12 on the display part 21, when the shortage of the installation | attachment number of the grounding electric wires 40 is detected, the said input part Regardless of the operation, it is possible not to start the pressure reduction, or it is possible to notify the operator of the shortage of the number of the grounding wires 40 attached by a notifying means (buzzer, lamp, etc.) not shown.

  Next, a method for applying a water stop treatment to the grounding wire 40 using the water stop suction device will be described.

  First, the operator adjusts each regulator R so that the suction pressure with respect to the decompression chamber S of each water stop suction tool 1 becomes the suction pressure corresponding to the type of the grounding electric wire 40 to be subjected to the water stop process. Operate a knob (not shown).

  Next, the other end (connector) of the grounding wire 40 in each housing hole 17 with the lid 3 in the open position (the position indicated by the two-dot chain line in FIG. 2) for each water-stop suction tool 1. Each of the terminals on the side to which the connection terminal T is connected is inserted. Next, midway portions of the grounding wires 40 are inserted into the slits 11 a, and the grounding wires 40 are fixed to the base 2.

  In this state, the lid 3 is set to the closed position (the position indicated by the solid line in FIG. 2), and by confirming whether or not each grounding wire 40 is set by checking the display unit 21, the input is performed. An instruction to start decompression is input by a unit (not shown).

  Next, the decompression in the decompression chamber S is started in response to the input of the decompression start instruction. As a result, the inner space of the covering material 42 in the grounding electric wire 40 inserted into each accommodation hole 17 is also decompressed simultaneously. Here, the operator can confirm whether or not the inside of the decompression chamber S is depressurized to a preset suction pressure by confirming the display unit 21.

  Then, in this state, the operator covers the one end of each ground wire 40 (the terminal on the side led out to the outside of the water stop suction tool 1), the arrow A portion of FIG. A water-stopping agent having fluidity is dropped onto a root portion of the conductor 41 exposed by peeling off the material 42 with a dispenser (not shown). In addition, this dripping position can be appropriately set according to the terminal structure.

  At the time of supplying such a water-stopping agent, the inner space of the covering material 42 is depressurized as described above. Therefore, even if the viscosity of the water-stopping agent is somewhat high, the water-stopping agent is surely covered The water stop structure which permeate | infiltrates inside and covers the water channel in the said covering material 42 is constructed | assembled.

  The water-stopping agent used here may be any one that has fluidity at least at the time of supply and has a certain viscosity when the electric wire is used. Therefore, this water-stopping agent may be one whose properties hardly change over time, but more preferably one that cures and increases its viscosity after being supplied.

  Specifically, if the initial viscosity is about 0.6 Pa · s, it is confirmed that it can penetrate into the coating material 42 by reducing the pressure for about 5 to 120 seconds at a pressure of about 10 kPa to 100 kPa. As the material, silicone resin, silicone rubber, grease, and other adhesives having viscosity and elasticity are suitable. The silicone resin can be used regardless of whether it is a two-component type (a type in which curing starts by mixing two components) or a one-component type (a type that spontaneously cures with only one component).

  As described above, according to the water stop suction device, the suction pump P common to each decompression chamber S is provided by the regulator R provided between each of the plurality of decompression chambers S and the suction pump P. Since the set pressure can be individually adjusted for each decompression chamber S while being used, the equipment can be simplified as compared with the case where the suction pump P is provided for each decompression chamber S. Cost can be reduced.

  Furthermore, according to the water stop suction device, the other end of each of the plurality of grounding wires 40 sealed in the decompression chamber S by decompressing the interior of each decompression chamber S by the suction pump P ( It is also possible to suck air simultaneously from the terminal on the side to which the terminal T is connected. In this case, workability can be improved as compared with the case where the plurality of grounding wires 40 are individually decompressed. .

  Therefore, in the water stop suction device, the pressure reduction process can be performed under the pressure reduction conditions suitable for the plurality of different types of grounding wires 40 while reducing the equipment cost.

  In particular, in the water stop suction device, even when the water stop treatment is performed on the common crimp wire (see FIG. 1 (c)), the grounding wires 40a and 40b are connected to different water stop suction tools 1 respectively. The inside of the covering material 42 of the grounding wires 40a and 40b can be decompressed by the individual suction pressure set for these water stop suction tools.

  According to the configuration in which the plurality of water-stopping suction devices 1 are provided and the decompression chamber S is formed in each water-stopping suction device 1 as in the above-described embodiment, When the water stop treatment is required, the water stop suction tool 1 can be properly used for each process, and the decompression chambers S of the water stop suction tools can be decompressed by a common suction pump.

  Moreover, in the said embodiment, since the water stop suction tool 1 can also be used properly according to the kind of the earthing | grounding electric wire 40, for example, the kind of earthing | grounding electric wire 40 and the pressure reduction conditions corresponding to this kind are match | combined reliably. In this state, the operator can execute the decompression process.

  According to the configuration in which the decompression chamber S is formed by attaching the lid 3 to the base 2 as in the embodiment, the water-stop suction tool 1 has a relatively simple configuration. be able to.

  According to the configuration in which the clamp 5 for pressing the lid 3 in the closed position against the base 2 side is provided in the water stop suction tool 1 as in the embodiment, the base 2 and the lid 3 are clamped by the clamp 5. Therefore, the airtight performance of the decompression chamber S can be further improved, and thus the required power of the suction pump P can be reduced.

  According to the configuration in which the detection sensor 12 is provided in the water stop suction tool 1 as in the embodiment, it can be detected whether or not the grounding wire 40 is held in the decompression chamber S. Generation | occurrence | production of the idle driving | running | working by forgetting installation of the electric wire 40 for earth | grounds can be suppressed.

  According to the configuration in which the pressure sensor 9 is provided in the water stop suction tool 1 as in the above embodiment, the pressure in the decompression chamber S can be detected. It is possible to suppress the decompression process from being performed in the state.

  In addition, in the said embodiment, although it is trying to attract | suck the two electric wires 40 for earth | ground simultaneously about the suction tool 1 for water stop, By changing the cross-sectional area or cross-sectional shape of the said recessed part 4, It is also possible to simultaneously perform the pressure reducing operation for three or more grounding wires 40.

  Further, in the waterstop suction tool 1 of the above embodiment, the recess 4 is partitioned into two housing holes 17 by the wall 18, but the wall 18 is omitted to form a housing hole that opens relatively large, You may make it accommodate one terminal of the some electric wire for earth | ground in this accommodation hole collectively.

  On the other hand, as shown in FIG. 6, the wall 18 is further provided with an extended portion 7b of the rubber packing 7, and a pair of openings 7c partitioned by the extended portion 7b and the receiving holes 17 The recess 4 may be formed. In this case, two decompression chambers S are formed for one water-stop suction tool 1 corresponding to each concave portion 4. It is preferable to provide individual regulators R for the respective port portions 10 communicating with each other.

  According to this configuration, the pair of left and right decompression chambers S can be formed by setting the lid 3 to the closed position, and the suction pressure in the decompression chambers S can be individually adjusted by the regulator R. Therefore, two types of grounding wires 40 can be sucked with different suction pressures in one water stop suction tool 1.

  And in the said structure, since the pressure reduction process of the multiple types of electric wire 40 for earth | grounds can be performed using the common water-stop suction tool 1, For example, when performing a pressure reduction process with respect to the said common crimping line, The plurality of grounding wires 40a and 40b crimped to the common crimping wire can be depressurized at the same time, and the water stop treatment can be completed for each common crimping wire. As a result, workability can be further improved.

  In each of the above-described embodiments, each housing hole 17 is formed in a cross-sectional area and a cross-sectional shape capable of housing the ground connection terminal 50. However, the present invention is not limited to this, and the housing hole 17 has at least a water stop What is necessary is just to be the magnitude | size which can accommodate the said other terminal of the electric wire 40 for earth | ground used as the object of a process.

  In the above embodiment, the pressure reduction start instruction is input by the input unit. However, the present invention is not limited to this. For example, the ON / OFF is linked with the swing operation of the clamp 5. A switch may be provided, and the pressure reduction may be started together with the swinging operation to the closed position by this switch.

  Furthermore, in the said embodiment, although the cover body 3 is made to rock | fluctuate with respect to the base 2 with the clamp 5, as a drive mechanism of the cover body 3, it is not limited to the clamp 5, The said base 2 Alternatively, an air cylinder that raises and lowers the lid 3 can be used.

  In the embodiment, the lid 3 and the base 2 are brought into close contact with each other by the pressing force of the clamp 5, but the pressing force required for this contact is not limited to the pressing force of the clamp 5, A force corresponding to a pressure difference between the pressing force by the air cylinder or the negative pressure by the suction pump P and the atmospheric pressure applied to the lid 3 can also be used.

  Furthermore, according to the water stop suction device, the display unit 21 displays whether or not the predetermined number (two in the embodiment) of the grounding electric wires 40 are attached to each water stop suction tool 1. As a result, it is possible to prevent the worker from forgetting to attach the grounding wire 40, and as a result, the decompression work can be reliably performed on the specified number of grounding wires 40.

  The water stop treatment was performed under the following conditions using the water stop suction device shown in FIGS.

Wire length: 0.5-3m
Wire cross-sectional area ... 0.5 to 1.25mm ²
Water-stop agent used: Silicone rubber (viscosity 0.6 Pa · s)
Water-stopping agent dripping amount: 5-20mg (about 1-4 drops)
Pressure during decompression: 60kPa for each decompression chamber S
Depressurization time: 10 to 60 s from the time when the water-stopper was supplied
As a result of performing such a water stop treatment, it was confirmed that the water stop agent permeates the inside of the covering material 42 over an area of 10 to 50 mm from the end of the electric wire. Furthermore, after conducting a cold endurance test over 1000 cycles in the temperature range of −40 ° C. to 80 ° C. and a high temperature standing test over 120 hours at a temperature of 120 ° C., the electric wire was pressurized to 30 kPa. It was confirmed that a sufficient water-stopping effect was exhibited.

  On the other hand, when pressure reduction of the inner space of the covering material 42 was not performed, only a region of about 3 to 10 mm from the end of the electric wire was recognized as the penetration portion of the water stop agent.

An example of the grounding electric wire used as the object of the water stop process by the water stop suction device which concerns on this invention is shown, (a) is a top view, (b) is a side view, (c) is an example of a common crimp line. FIG. It is a top view which shows roughly the whole structure of the suction apparatus for water stop which concerns on this invention. FIG. 3 is a side partial cross-sectional view schematically showing an overall configuration of the water stop suction device of FIG. 2. It is the IV-IV sectional view taken on the line of FIG. It is a top view of the suction tool for water stop of FIG. It is a top view which shows roughly the suction apparatus for water stop which concerns on another embodiment.

DESCRIPTION OF SYMBOLS 1 Suction tool for water stop 2 Base 3 Lid 4 Recessed part 5 Clamp 5a Support shaft 9 Pressure sensor (pressure detection means)
12 Detection sensor (wire detection means)
17 Housing hole 40 Grounding wire 41 Conductor 42 Coating material P Suction pump (suction source)
R regulator (pressure adjustment part)
S decompression chamber

Claims (6)

In order to water-stop an in-vehicle electric wire mounted on a vehicle, which is an electric wire having a coating material on the outside of the conductor, a fluid waterproofing agent supplied to one end of the in-vehicle electric wire is coated with the coating. A suction device for water stop that sucks the other end of the in-vehicle electric wire so as to penetrate inside the material and depressurizes the inside of the covering material,
A water-stop suction tool that forms a plurality of decompression chambers capable of sealingly holding the other end of the in-vehicle electric wire;
A suction source connected in common to each decompression chamber and capable of decompressing each decompression chamber;
A pressure adjusting unit that is provided between the suction source and each decompression chamber, and adjusts the pressure in each decompression chamber at the time of suction of air by the suction source, for each decompression chamber ;
The water-stop suction tool includes a base formed with a recess capable of accommodating the other end of the in-vehicle electric wire, and a middle portion of the in-vehicle electric wire in which the other end is accommodated in the recess. A lid that forms the decompression chamber by detachably closing the recess, and a pressing means that presses the lid in a posture to form the decompression chamber against the base side. Suction device for water stop.   The water stop suction device according to claim 1, wherein the in-vehicle electric wire is a grounding electric wire for connecting a circuit mounted on the vehicle to the ground.   3. The water stop suction device according to claim 1, further comprising a plurality of water stop suction tools, each of which has a decompression chamber formed therein. 4.   4. The water stop suction device according to claim 1, wherein a plurality of decompression chambers are formed in a common water stop suction tool. 5. The said water stop suction tool is equipped with the electric wire detection means which detects whether the vehicle-mounted electric wire is hold | maintained at the said decompression chamber, The any one of Claims 1-4 characterized by the above-mentioned. Suction device for water stop. The water stop suction device according to any one of claims 1 to 5, wherein the water stop suction tool includes pressure detection means for detecting a pressure in the decompression chamber.

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