JP5101844B2 - Coloring nozzle - Google Patents

Description

  The present invention relates to a coloring nozzle used when coloring an article such as an electric wire having a conductive core wire and an insulating covering portion covering the core wire.

  Various electronic devices are mounted on automobiles or the like as moving bodies. For this reason, the automobile or the like is wired with a wire harness in order to transmit electric power from a power source or the like or a control signal from a computer or the like to the electronic device. The wire harness includes a plurality of electric wires and a connector attached to an end portion of the electric wires.

  The electric wire has a conductive core wire and a covering portion made of an insulating synthetic resin that covers the core wire. The electric wire is a so-called covered electric wire. The connector has a terminal fitting and a connector housing that houses the terminal fitting. The terminal fitting is made of conductive sheet metal or the like and is attached to the end of the electric wire to be electrically connected to the core wire of the electric wire. The connector housing is made of an insulating synthetic resin and is formed in a box shape. In the wire harness, the connector housing is coupled to the above-described electronic device or the like, so that each electric wire is electrically connected to the above-described electronic device via the terminal fitting, and transmits desired power and signals to the above-described electronic device. .

  When assembling the wire harness, the electric wire is first cut to a predetermined length, and then the covering portion such as the end of the electric wire is removed (peeled), and the terminal fitting is attached. Connect wires as needed. Thereafter, the terminal fitting is inserted into the connector housing. Thus, the wire harness described above is assembled.

  The wires of the wire harness described above need to identify the size of the core wire, the material of the covering portion (change of the material depending on the presence or absence of heat resistance, etc.), the purpose of use, and the like. The purpose of use is, for example, an automobile system (system) in which electric signals such as airbags, ABS (Antilock Brake System) and vehicle speed information, and power transmission systems are used.

  Therefore, the electric wire used for the wire harness is mixed with a coloring material of a desired color into the synthetic resin constituting the covering portion when the above-described synthetic resin constituting the covering portion is extruded and coated around the core wire. The covering portion has been colored in a desired color (for example, see Patent Documents 1 to 3). In this case, when changing the color of the outer surface of an electric wire, it is necessary to stop the extrusion coating apparatus which performs the above-mentioned extrusion coating. In this case, it is necessary to stop the extrusion coating device every time the color of the electric wire is changed, and the time and labor required for the production of the electric wire increase, and the production efficiency of the electric wire tends to decrease.

  Alternatively, the color of the colorant mixed in the synthetic resin has been changed in a state where the extrusion coating apparatus performs extrusion coating. In this case, immediately after changing the color of the coloring material, the color of the synthetic resin constituting the covering portion is a color in which the color of the coloring material before the change of the covering portion and the color of the coloring material after the change are mixed. . For this reason, it was in the tendency for the material yield of an electric wire to fall.

In order to prevent the reduction in the productivity of the electric wires and the reduction in the material yield of the electric wires, the applicant of the present invention manufactured, for example, a monochromatic electric wire, and if necessary, the outer surface of the electric wire as an article It is proposed that the wire harness is assembled by coloring the desired color (see Patent Document 4). In addition, the applicant of the present invention, when coloring a monochromatic electric wire after manufacture, sprays a liquid coloring material by a certain amount toward the outer surface of the electric wire as an article, and drops the coloring material. Has proposed an electric wire coloring device for coloring an electric wire to a desired color by adhering to the outer surface of the electric wire (Patent Document 5).
reference). 9 and 10 are cross-sectional views showing the main part of the coloring nozzle of the coloring apparatus.

As shown in FIGS. 9 and 10, the coloring nozzle 254 has a first nozzle member 237 that is formed in a cylindrical shape and allows the coloring material to flow through the inner flow path 237 </ b> A, and closer to the electric wire side than the first nozzle member 237. The second nozzle member 250 is disposed, and a connection pipe 251 for connecting the nozzle members 237 and 250 is provided. The second nozzle member 250 has an inner diameter (about 100 μm) of the flow path 250 </ b> A smaller than the inner diameter of the flow path 237 </ b> A of the first nozzle member 237, and is along the longitudinal direction of the coloring nozzle 254. The length is about 0.5 mm. By forming in this way, the flow rate is increased when the colorant moves from the flow path 237A to the flow path 250A, so that the amount of the colorant sprayed can be adjusted and at the time of droplet spraying. The cutting of the coloring material can be improved.
Japanese Patent Laid-Open No. 5-111947 Japanese Patent Laid-Open No. 6-119833 JP-A-9-92056 International Publication No. 03/019580 Pamphlet Japanese Patent Application No. 2005-019081

  However, the coloring nozzle 254 of the conventional coloring apparatus has the following problems. That is, the coloring nozzle 254 is formed so that the flow rate of the coloring material increases when the coloring material moves from the flow path 237A to the flow path 250A for the above-described purpose. When the valve for feeding the colorant to the nozzle member 237 side is closed, the colorant whose flow rate is increased by the flow path 250A jumps out of the color nozzle 254 due to inertia (see FIG. 9), and the color nozzle. There was a phenomenon that bubbles would flow into the 254 channels 237A and 250A (see FIG. 10).

  Then, as described above, when the bubbles flow into the flow paths 237A and 250A of the coloring nozzle 254, the coloring material leaks from the coloring nozzle 254 even though no droplet signal is given to the coloring device. A dripping phenomenon occurs, or the colorant in the coloring nozzle 254 is dried and solidified by bubbles flowing into the flow paths 237A and 250A of the coloring nozzle 254, resulting in nozzle clogging, or coloring that has leaked from the coloring nozzle 254. The material adheres to the distal end surface 250b of the second nozzle member 250 near the electric wire, causing problems such as the unstable spraying direction of the coloring material.

  Therefore, the object of the present invention is to prevent dripping, nozzle clogging, defective spraying direction, etc. by preventing bubbles from flowing into the flow path of the coloring nozzle when the spraying of the coloring material is stopped. It is to provide a coloring nozzle.

In order to achieve the above-described object, the invention described in claim 1 is characterized in that a liquid colorant is sprayed by a certain amount toward the outer surface of the article, and the droplets of the colorant are discharged outside the article. In a coloring nozzle that attaches to the surface and colors the article, a storage portion that stores the coloring material, a cylindrical shape having a constant inner diameter over the entire length, and the coloring material flows inside, and the storage portion contains the coloring material. A first nozzle member communicating with the first nozzle member; and a first nozzle member formed in a cylindrical shape and disposed closer to the article than the first nozzle member and connected to the first nozzle member; 2 nozzle members, and the second nozzle member has a smaller diameter portion having an inner diameter smaller than that of the first nozzle member, and is disposed closer to the article than the smaller diameter portion and has an inner diameter larger than the smaller diameter portion. the first of the large-diameter portion larger, before Than the small-diameter portion disposed in said first nozzle member closer, and is configured to have a large diameter portion smaller in second than larger the first nozzle member than an inner diameter of the small diameter portion, wherein An end surface of the second nozzle member near the first nozzle member protrudes from the inner surface of the first nozzle member toward the inside of the first nozzle member .

  The colorant as used in the present specification is a liquid substance in which a colorant (industrial organic substance) is dissolved and dispersed in water or other solvent. Examples of organic substances include dyes and pigments (mostly organic substances and synthetic products). Sometimes dyes are used as pigments and pigments are used as dyes. As a more specific example, the coloring material referred to in the present specification indicates both a coloring liquid and a paint. The coloring liquid indicates that the dye is dissolved or dispersed in the solvent, and the paint indicates that the pigment is dispersed in the dispersion.

  For this reason, when the outer surface of the article is colored with the coloring liquid, the dye penetrates into the article, and when the outer surface of the article is colored with the paint, the pigment adheres to the outer surface without entering the article. That is, coloring the outer surface of an article in the present specification means that a part of the outer surface of the article is dyed with a dye and a pigment is applied to a part of the outer surface of the article.

  Further, the solvent and the dispersion are preferably those having an affinity for the synthetic resin constituting the article. In this case, the dye surely penetrates into the article or the pigment adheres securely to the outer surface of the article.

  According to the first aspect of the present invention, when the coloring material is sprayed, when the coloring material moves from the first nozzle member to the small diameter portion of the second nozzle member, the flow velocity is increased and the small diameter portion is increased. Since the droplets are sprayed from the end surface near the article, it is possible to adjust the spray amount of the coloring material and the like and to improve the cutting of the coloring material. When the spraying of the coloring material is stopped, the coloring material in a state where the flow velocity in the small diameter portion is increased moves into the first large diameter portion of the second nozzle member due to inertia, and the first large diameter portion is moved from the small diameter portion. By slowing down the flow velocity when moving to the diameter portion, the color material stops without jumping out of the coloring nozzle and where the liquid level is flush with the end surface of the first large diameter portion near the article. Thereafter, the coloring material is pushed back into the coloring nozzle by the atmospheric pressure, and the liquid level is flush with the end surface of the small diameter portion near the article. Accordingly, it is possible to provide a colored nozzle that can prevent bubbles from flowing into the flow path of the colored nozzle, thereby preventing dripping, clogging of the nozzle, defective droplet ejection direction, and the like. In addition, since nozzle clogging can be prevented, it is not necessary to discard the coloring material, which has been conventionally performed at the start of spraying of the coloring nozzle, and the amount of coloring material used can be reduced.

Moreover, according to this invention of Claim 1 , by providing the 2nd large diameter part between the 1st nozzle member and the small diameter part of the 2nd nozzle member, from the 1st nozzle member The inner diameter can be reduced stepwise toward the small diameter portion, and the flow rate of the coloring material flowing through these channels can be finely adjusted.

  Hereinafter, a coloring nozzle 31 according to an embodiment of the present invention will be described with reference to FIGS. The coloring nozzle 31 shown in FIGS. 3 and 4 constitutes an electric wire coloring device (hereinafter simply referred to as a coloring device) 1 for coloring the electric wire as the article shown in FIG. 1 (attached to the coloring device 1). The coloring apparatus 1 is an apparatus that cuts the electric wire 3 as an article into a predetermined length and forms a mark 6 on a part of the outer surface 3a of the electric wire 3 as the article. In other words, the coloring device 1 is a device that colors, that is, marks, the outer surface 3a of the electric wire 3 as an article.

  The electric wire 3 as an article constitutes a wire harness routed in an automobile as a moving body. The electric wire 3 has the electroconductive core wire 4 and the insulating coating | coated part 5 as shown to Fig.5 (a). The core wire 4 is formed by twisting a plurality of strands. The strand which comprises the core wire 4 consists of an electroconductive metal. Moreover, the core wire 4 may be comprised from one strand. The covering portion 5 is made of, for example, a synthetic resin such as polyvinyl chloride (PVC). The covering portion 5 covers the core wire 4. For this reason, the outer surface 3 a of the electric wire 3 forms the outer surface of the covering portion 5.

  The covering portion 5 is a single color P. In addition, a desired coloring material may be mixed in the synthetic resin constituting the covering portion 5 so that the outer surface 3a of the electric wire 3 may be a single color P without mixing the coloring material into the synthetic resin constituting the covering portion 5. The single color P may be the color of the synthetic resin itself. When the single color P is the color of the synthetic resin itself without mixing the coloring material in the synthetic resin constituting the covering portion 5, the covering portion 5, that is, the outer surface 3a of the electric wire 3, is said to be uncolored. As described above, the term “non-colored” indicates that the outer surface 3a of the electric wire 3 is the color of the synthetic resin itself without mixing the coloring material into the synthetic resin constituting the covering portion 5. The outer surface 3a of the electric wire 3 may be uncolored as described above, or may be a single color such as white.

  A mark 6 composed of a plurality of points 7 is formed on the outer surface 3 a of the electric wire 3. Point 7 is color B (indicated by parallel diagonal lines in FIG. 5). The color B is different from the single color P. The planar shape of the point 7 is a round shape as shown in FIG. A plurality of points 7 are provided, and are arranged along the longitudinal direction of the electric wire 3 according to a predetermined pattern. In the illustrated example, the points 7 are arranged at equal intervals along the longitudinal direction of the electric wire 3. Further, the distance between the centers of the adjacent points 7 is determined in advance.

  A plurality of electric wires 3 having the above-described configuration are bundled and a connector or the like is attached to an end portion or the like to constitute the above-described wire harness. The connector is connected to a connector of various electronic devices such as an automobile, and the wire harness, that is, the electric wire 3 transmits various signals and electric power to each electronic device.

  Moreover, the electric wires 3 can be identified by changing the color B of each point 7 of the mark 6 described above into various colors. In the illustrated example, the color B of all the points 7 is made the same, but the color B may be changed for each point 7 to make the color B different between the points 7 as necessary. The color B of each point 7 of the mark 6 is used for identifying the line type and system (system) of the electric wire 3 of the wire harness. That is, the color B of each point 7 of the mark 6 described above is used to identify the line type and purpose of use of each electric wire 3 of the wire harness.

  As shown in FIG. 1, the coloring apparatus 1 includes a frame 10, a guide roll 11, a delivery roll 12, a correction unit 13, a slack absorbing unit 14, a coloring unit 15, a duct 16, an encoder 17, A cutting mechanism 18 and a control device 19 are provided.

  The frame 10 is installed on a floor of a factory or the like and extends in the horizontal direction. The guide roll 11 is rotatably attached to one end of the frame 10. The guide roll 11 is wound with an electric wire 3 that is long and has no mark 6 formed thereon. The guide roll 11 sends the electric wire 3 in order to the correction unit 13, the slack absorbing unit 14, the coloring unit 15, the duct 16, the encoder 17, and the cutting mechanism 18.

  A pair of delivery rolls 12 is provided at the other end of the frame 10. The pair of delivery rolls 12 are rotatably supported by the frame 10 and are arranged along the vertical direction. The delivery roll 12 is rotated at the same rotational speed in opposite directions by a motor (not shown). The pair of delivery rolls 12 sandwich the electric wire 3 between each other and pull the guide roll 11 along the longitudinal direction of the electric wire 3. In this way, the delivery roll 12 moves the electric wire 3 along the longitudinal direction of the electric wire 3, thereby causing the coloring nozzle 31 (described later) of the coloring unit 15 and the electric wire 3 to move relative to each other along the longitudinal direction of the electric wire 3. Move. For this reason, the electric wire 3 moves along the arrow K in FIG. 1 from the guide roll 11 toward the delivery roll 12. An arrow K indicates the moving direction of the electric wire 3.

  The correction unit 13 is provided downstream of the guide roll 11 in the moving direction K of the electric wire 3 and upstream of the sending roll 12 in the moving direction K of the electric wire 3. The correction unit 13 has a plate-like unit body 20 fixed to the frame 10, a plurality of first rollers 21, and a plurality of second rollers 22.

  The first and second rollers 21 and 22 are respectively rotatably supported by the unit body 20. The plurality of first rollers 21 are arranged along the horizontal direction (the movement direction K described above) and are arranged above the electric wires 3. The plurality of second rollers 22 are arranged along the horizontal direction (the moving direction K described above) and are arranged below the electric wires 3. As shown in FIG. 1, the first roller 21 and the second roller 22 are arranged in a staggered manner.

  The correction unit 13 linearizes the electric wire 3 fed from the guide roll 11 by the feed roll 12 between the first roller 21 and the second roller 22. Further, the correction unit 13 applies a frictional force to the electric wire 3 by being sandwiched between the first roller 21 and the second roller 22. That is, the correction unit 13 applies a first biasing force H <b> 1 in the direction opposite to the direction in which the feed roll 12 pulls the electric wire 3 (the movement direction K described above) to the electric wire 3. The first urging force H1 is weaker than the force with which the feed roll 12 pulls the electric wire 3. For this reason, the correction unit 13 applies tension along the longitudinal direction to the electric wire 3.

  The slack absorbing unit 14 is provided downstream of the correction unit 13 in the moving direction K of the electric wire 3 and upstream of the feeding roll 12 in the moving direction K of the electric wire 3. The slack absorbing unit 14 is provided between the correction unit 13 and a coloring nozzle 31 described later of the coloring unit 15.

  As shown in FIG. 1, the slack absorbing unit 14 includes a pair of guide roller support frames 23 fixed to the frame 10 and arranged at intervals along the moving direction K of the electric wire 3, and the guide roller support frame 23. A pair of guide rollers 24 rotatably supported on the frame, a moving roller support frame 25 fixed between the frame 10 and provided between the pair of guide roller support frames 23, and a movement provided in the center between the guide rollers 24. A roller 26 and an air cylinder 27 are provided.

  The guide roller 24 is arranged below the electric wire 3 and guides the electric wire 3 so that the electric wire 3 does not fall out from the moving direction K by contacting the outer peripheral surface with the electric wire 3. For this reason, the guide roller 24 guides the moving direction K of the electric wire 3.

  The moving roller 26 is rotatably supported by the moving roller support frame 25 and is supported so as to be movable along the vertical direction. The moving roller 26 is disposed above the electric wire 3. The moving roller 26 is supported so as to be movable along a direction orthogonal (crossing) to the moving direction K of the electric wire 3 by being supported so as to be movable along the vertical direction.

  The air cylinder 27 has a cylinder main body 28 fixed to the moving roller support frame 25 and disposed above the electric wire 3, and a telescopic rod 29 that can extend and contract from the cylinder main body 28. The telescopic rod 29 extends from the cylinder body 28 in a direction approaching the electric wire 3. A movable roller 26 is attached to the telescopic rod 29. The air cylinder 27 is supplied with pressurized gas into the cylinder body 28, thereby causing the telescopic rod 29, that is, the moving roller 26 to intersect (cross) the moving direction K with a second urging force H 2 (shown in FIG. 1). ) Is urged downward, that is, in a direction approaching the electric wire 3. Further, the second urging force H2 is weaker than the first urging force H1.

  When a later-described pair of cutting blades 48 and 49 of the cutting mechanism 18 approach each other and the electric wire 3 stops once to cut the electric wire 3, the electric wire 3 advances along the arrow K due to inertia. Is loosened between the pair of guide rollers 24. At this time, in the slack absorbing unit 14 configured as described above, since the air cylinder 27 urges the moving roller 26 with the second urging force H2, the telescopic rod 29 of the air cylinder 27 expands, and the moving roller 26 Is displaced to a position indicated by a two-dot chain line in FIG. Then, the slack absorbing unit 14 urges the wire 3 slackened between the above-described guide rollers 24 along a direction orthogonal (crosses) to the moving direction K, absorbs the slack, and stretches the wire 3. Keep on.

  The coloring unit 15 is provided downstream of the slack absorbing unit 14 in the moving direction K of the electric wire 3 and upstream of the feeding roll 12 in the moving direction K of the electric wire 3. That is, the coloring unit 15, that is, a coloring nozzle 31 described later, is disposed between the feed roll 12 and the correction unit 13.

  As shown in FIG. 2, the coloring unit 15 includes a unit main body 30 fixed to the frame 10 and a plurality of coloring nozzles 31 supported by the unit main body 30. The coloring nozzle 31 sprays a liquid coloring material from a coloring material supply source 32, which will be described later, toward the outer surface 3a of the electric wire 3 by a predetermined amount to color at least a part of the outer surface 3a of the electric wire 3 (marking). ) The detailed configuration of the coloring nozzle 31 will be described later.

  A plurality of coloring nozzles 31 are arranged along the moving direction K of the electric wire 3. In the illustrated example, the unit main body 30 has five colored nozzles 31 arranged along the moving direction K of the electric wire 3. In addition, as shown in FIG. 3, each coloring nozzle 31 has an uppermost portion 3 b of the electric wire 3 positioned on an extension of an axis R (shown by a one-dot chain line in FIG. 3) of a first nozzle member 37 to be described later. In the state, it is supported by the unit main body 30. The coloring nozzle 31 sprays the coloring material along the axis R. For this reason, the coloring nozzle 31 sprays the coloring material by a certain amount toward the uppermost part 3 b of the electric wire 3.

  In the present specification, a coloring material having a viscosity of 10 mPa · s (millipascal second) or less is used. The colorant mentioned above is a liquid substance in which a colorant (industrial organic substance) is dissolved and dispersed in water or other solvent. Examples of organic substances include dyes and pigments (mostly organic substances and synthetic products). Sometimes dyes are used as pigments and pigments are used as dyes. As a more specific example, the colorant is a coloring liquid or a paint. The coloring liquid indicates that the dye is dissolved or dispersed in the solvent, and the paint indicates that the pigment is dispersed in the dispersion. For this reason, when the coloring liquid adheres to the outer surface 3 a of the electric wire 3, the dye penetrates into the covering portion 5, and when the paint adheres to the outer surface 3 a of the electric wire 3, the pigment does not penetrate into the outer covering portion 5. Adhere to 3a. That is, coloring the outer surface 3a of the electric wire 3 means dyeing (dying) a part of the outer surface 3a of the electric wire 3 and applying a pigment to a part of the outer surface 3a of the electric wire 3. ing. Further, the solvent and the dispersion are preferably those having an affinity for the synthetic resin constituting the covering portion 5. In this case, the dye is surely soaked into the covering portion 5, and the pigment is securely adhered to the outer surface 3a.

  Further, the above-described droplet spraying indicates that the liquid colorant is urged and ejected from the coloring nozzle 31 toward the outer surface 3a of the electric wire 3 in a droplet state, that is, a droplet state.

  The duct 16 is provided downstream of the coloring unit 15 in the movement direction K of the electric wire 3 and upstream of the feeding roll 12 in the movement direction K of the electric wire 3. The duct 16 is formed in a cylindrical shape and allows the electric wire 3 to pass inside. A suction means (not shown) such as a vacuum pump is connected to the duct 16. The suction means sucks the gas in the duct 16 and prevents the solvent, the dispersion liquid, and the like in the coloring material from being filled outside the coloring device 1.

  The encoder 17 is provided downstream of the feed roll 12 in the movement direction K of the electric wire 3. As shown in FIG. 1, the encoder 17 has a pair of rotors 47. The rotor 47 is supported so as to be rotatable around the axis. The outer peripheral surface of the rotor 47 is in contact with the outer surface 3 a of the electric wire 3 sandwiched between the pair of delivery rolls 12. The rotor 47 rotates as the core wire 4, that is, the electric wire 3 travels (moves) along the arrow K. That is, the rotor 47 rotates around the axial core as the core wire 4, that is, the electric wire 3 travels (moves) along the arrow K. Of course, the travel (movement) amount of the core wire 4, that is, the electric wire 3 along the arrow K is proportional to the rotational speed of the rotor 47.

  The encoder 17 is connected to the control device 19. The encoder 17 outputs a pulse signal to the control device 19 when the rotor 47 rotates by a predetermined angle. That is, the encoder 17 outputs information corresponding to the amount of movement of the electric wire 3 along the arrow K toward the control device 19. Thus, the encoder 17 measures information according to the amount of movement of the electric wire 3 and outputs information according to the amount of movement of the electric wire 3 toward the control device 19. The normal encoder 17 outputs a pulse signal corresponding to the amount of movement of the electric wire 3 due to the friction between the electric wire 3 and the rotor 47. However, when the amount of movement and the number of pulses do not necessarily match depending on the state of the outer surface 3a of the electric wire 3, speed information may be obtained at another location, the information may be fed back, and a comparison operation may be performed.

  The cutting mechanism 18 is disposed downstream of the pair of rotors 47 of the encoder 17 in the movement direction K of the electric wire 3. The cutting mechanism 18 has a pair of cutting blades 48 and 49. The pair of cutting blades 48 and 49 are arranged along the vertical direction. The pair of cutting blades 48 and 49 approach or separate from each other along the vertical direction. When the pair of cutting blades 48 and 49 come close to each other, the electric wire 3 fed by the pair of feeding rolls 12 is sandwiched between each other and cut. When the pair of cutting blades 48 and 49 are separated from each other, of course, they are separated from the electric wire 3.

The control device 19 is a computer having a known RAM, ROM, CPU and the like. The control device 19 is connected to the feed roll 12, the encoder 17, the cutting mechanism 18, the coloring nozzle 31, that is, the coloring unit 15, and the like. By controlling these operations, the entire coloring device 1 is controlled. Control.

  The control device 19 stores a pattern of the mark 6 in advance. When a predetermined pulse signal, that is, information corresponding to the amount of movement of the electric wire 3 is input from the encoder 17, the control device 19 applies a predetermined time to the coil 40 of the coloring nozzle 31 for a predetermined time. The coloring material is sprayed by a certain amount toward the electric wire 3. The control device 19 shortens the time interval for spraying the coloring material from the coloring nozzle 31 when the moving speed of the electric wire 3 increases according to the pattern of the mark 6 stored in advance, and the coloring nozzle 31 when the moving speed of the electric wire 3 decreases. Increase the time interval for spraying the colorant. Thus, the control device 19 colors the electric wire 3 according to a previously stored pattern. Moreover, if the control apparatus 19 determines with the information from the encoder 17 that the electric wire 3 moved a predetermined amount, after stopping the sending roll 12, the pair of cutting blades 48 and 49 are brought close to each other to cut the electric wire 3. Further, the control device 19 controls a later-described cleaning unit 64 of the coloring nozzle 31 that does not color the outer surface 3a of the electric wire 3 among the plurality of coloring nozzles 31, and causes the cleaning unit 64 to be arranged at predetermined time intervals. The nozzle 54 of the coloring nozzle 31 is washed.

  Subsequently, the above-described coloring nozzle 31 will be described in more detail. As shown in FIGS. 1 to 3, the coloring nozzle 31 includes a nozzle unit 52, a coloring material supply unit 53, and a cleaning unit 64. 4, the nozzle unit 52 includes a cylindrical nozzle body 34, an insert member 35 accommodated in the nozzle body 34, an inflow pipe 36, a nozzle 54, a valve mechanism 38, And a nozzle cover 55.

  The insert member 35 is formed in a cylindrical shape, and a flow path 39 through which a coloring material is passed is formed inside. The flow path 39 is filled with a coloring material supplied from a coloring material supply source 32 described later. The insert member 35 constitutes a housing portion that houses the liquid coloring material described in this specification. The inflow pipe 36 communicates with the flow path 39 and guides the coloring material from the coloring material supply source 32 into the flow path 39.

  As illustrated in FIG. 6, the nozzle 54 includes a first nozzle member 37, a second nozzle member 50, and a connection pipe 51. The first nozzle member 37 is formed in a cylindrical shape and communicates with the inside of the flow path 39, and guides the coloring material in the flow path 39 toward the outside of the coloring nozzle 31. The inner diameter of the first nozzle member 37 is smaller than the inner diameter of the nozzle body 34, that is, the outer diameter of the flow path 39. The first nozzle member 37 is arranged coaxially with the nozzle body 34. The first nozzle member 37 is made of stainless steel.

  The second nozzle member 50 is disposed closer to the electric wire 3 than the first nozzle member 37 and is formed in a cylindrical shape. The second nozzle member 50 is made of polyetheretherketone (hereinafter referred to as PEEK). The outer diameter of the second nozzle member 50 is equal to the outer diameter of the first nozzle member 37. Thus, the nozzle 54 is formed in a cylindrical shape, and the coloring material flows inside and communicates with the insert member 35.

  The second nozzle member 50 is disposed closer to the electric wire 3 than the second large diameter portion 151 and the second large diameter portion 151 having an inner diameter smaller than that of the first nozzle member 37 and the second large diameter portion 151. The small-diameter portion 152 having an inner diameter smaller than the diameter portion 151 and the first large-diameter portion 153 disposed closer to the electric wire 3 than the small-diameter portion 152 and having an inner diameter larger than the small-diameter portion 152, The inner surface is formed in a stepped shape as shown in FIG. For this reason, the end surface 50 a of the second nozzle member 50 near the first nozzle member 37 protrudes from the inner surface of the first nozzle member 37 toward the inside of the first nozzle member 37. In the present embodiment, the inner diameter of the small diameter portion 152 is 90 μm, and the inner diameters of the second large diameter portion 151 and the first large diameter portion 153 are 125 μm. Moreover, the length along the longitudinal direction of the nozzle 54 of the small diameter part 152, the 2nd large diameter part 151, and the 1st large diameter part 153 is each formed in 0.5 mm. The second nozzle member 50 is arranged coaxially with the first nozzle member 37 and is connected to the first nozzle member 37.

  Further, the space between the first nozzle member 37 and the second nozzle member 50 is watertight. The coloring material flows through the second nozzle member 50 and the first nozzle member 37 along the arrow Q along the longitudinal direction of the first nozzle member 37 inside. That is, the small diameter portion 152, the second large diameter portion 151, and the first large diameter portion 153 constitute a flow path of the second nozzle member 50. An arrow Q indicates the direction in which the coloring material flows.

  The connection pipe 51 is made of a fluororesin and has a cylindrical shape. The inner diameter of the connection pipe 51 is substantially equal to the outer diameters of the first nozzle member 37 and the second nozzle member 50. The connection pipe 51 is fitted to the outside of both the first nozzle member 37 and the second nozzle member 50, and connects the first nozzle member 37 and the second nozzle member 50. Further, the connection pipe 51 makes the second nozzle member 50 detachable from the first nozzle member 37.

  The valve mechanism 38 includes a coil 40, a valve main body 41, and a coil spring 42. The coil 40 is provided outside the flow path 39 and is embedded in the insert member 35. A current is applied to the coil 40 from the outside. The valve main body 41 has a conductive main body 43 and a valve body 44. The main body 43 integrally includes a cylindrical columnar part 45 and a disk-shaped disk part 46 connected to one end of the cylindrical part 45.

  The main body 43 is accommodated in the flow path 39 with the disk portion 46 facing the proximal end portion 37 a of the first nozzle member 37 and the longitudinal direction of the cylindrical portion 45 being parallel to the longitudinal direction of the nozzle body 34. Has been. The main body 43, that is, the valve main body 41 is provided so as to be movable along the longitudinal direction of the cylindrical portion 45, that is, the longitudinal direction of the nozzle body 34.

  The valve body 44 is attached to the disc part 46 of the main body part 43. That is, the valve body 44 is accommodated in the insert member 35. The valve body 44 is opposed to the proximal end portion 37 a of the first nozzle member 37. Since the valve body 44 is attached to the disc portion 46 of the main body portion 43, the valve body 44 can be brought into contact with and separated from the base end portion 37 a of the first nozzle member 37. In addition, approaching / separating means approaching or leaving.

  The valve body 44 configured as described above contacts and separates from the base end portion 37a across an open position indicated by a two-dot chain line in FIG. 4 and a closed position indicated by a solid line in FIG. In the open position, the valve body 44 separates the coloring material from the base end portion 37 a and drops the coloring material toward the electric wire 3 through the first nozzle member 37 and the second nozzle member 50. In the closed position, the valve body 44 comes into contact with the base end portion 37 a and restricts the colorant from being sprayed toward the electric wire 3 through the first nozzle member 37 and the second nozzle member 50. In this way, the valve body 44 is brought into contact with and separated from the base end portion 37 a, thereby causing the coloring material to spray from the nozzle 54.

The coil spring 42 urges the disc portion 46 in a direction in which the valve body 44 approaches the proximal end portion 37 a of the first nozzle member 37.

  The nozzle cover 55 includes a cover main body 56 whose outer diameter is constant in the axial direction and whose inner diameter changes stepwise, and a nozzle fixing member 57. The cover main body 56 is attached to the unit main body 30. In the cover main body 56, the nozzle main body 34 of the nozzle unit 52 is positioned on a stepped surface 59 that changes the inner diameter stepwise, and the inflow pipe 36 of the nozzle unit 52 is positioned above and the nozzle members 37 and 50 are positioned below. The nozzle unit 52 is accommodated in the state.

  Further, the cover body 56 is provided with a packing 60 between the step surface 59 described above and the nozzle body 34 of the nozzle unit 52 so as to keep watertight between them. Further, a space 61 is provided between the cover main body 56 and the nozzle members 37 and 50, that is, the nozzles 54. The space 61 is open at the bottom. For this reason, the nozzle cover 55 does not prevent (allow) the colorant sprayed from the nozzle 54 from adhering to the electric wire 3. Further, the end surface 56 a of the cover main body 56 facing the electric wire 3 is positioned closer to the electric wire 3 of the distal end surface 50 b facing the electric wire 3 of the second nozzle member 50.

  As shown in FIG. 2, the nozzle fixing member 57 is attached to the cover main body 56, and fixes the nozzle unit 52 to the cover main body 56. The nozzle fixing member 57 keeps the cover main body 56 and the nozzle unit 52 coaxial.

  As shown in FIGS. 2 and 3, the coloring material supply unit 53 includes a plurality of coloring material supply sources 32 as coloring material supply means. The coloring material supply source 32 is a container that accommodates the coloring material, and supplies the coloring material into the inflow pipe 36 of the coloring nozzle 31. One coloring material supply source 32 corresponds to each coloring nozzle 31. The color B of the color material supplied from the color material supply source 32 to the color nozzle 31 may be different from each other or the same. The colorant supply source 32 is supplied with pressurized gas from a pressurized gas supply source 33 described later.

  As shown in FIG. 3, the cleaning unit 64 includes a cleaning liquid supply unit 65 and a cleaning liquid discharge unit 66. The cleaning liquid supply unit 65 includes a first container 67, a pressurized gas supply source 33, a first pipe 68, and a first valve 69.

  The first container 67 is a container for storing the cleaning liquid, and supplies the cleaning liquid into the space 61, that is, the nozzle cover 55 between the cover main body 56 and the nozzle 54 of the nozzle cover 55. One first container 67 may be provided corresponding to each of the coloring nozzles 31, or one corresponding to all the coloring nozzles 31, one for each of the plurality of coloring nozzles 31. It may be provided correspondingly. The cleaning liquid is a liquid such as a solvent or a dispersion that can dissolve and disperse the industrial organic material as the color material constituting the colorant. Furthermore, it is desirable that the cleaning liquid is a liquid that does not easily evaporate at room temperature.

The pressurized gas supply source 33 supplies the pressurized gas to both the colorant supply source 32 and the first container 67. The pressurized gas supply source 33 supplies the pressurized gas to both the colorant supply source 32 and the first container 67, thereby inserting the colorant supply source 32 and the insert members of the color nozzles 31. While pressurizing the coloring material in 35, the cleaning liquid in the first container 67 and the space 61 of each coloring nozzle 31 is pressurized.

  The pressurized gas supply source 33 pressurizes the coloring material in each coloring material supply source 32 and the insert member 35 of each coloring nozzle 31, so that the valve body 44 of the coloring nozzle 31 is based on the first nozzle member 37. When separated from the end portion 37 a, the coloring material in the flow path 39 is rapidly sprayed from the first nozzle member 37 and the second nozzle member 50.

  The first pipe 68 connects the pressurized gas supply source 33 and the first container 67 and communicates with the inside of the space 61 described above, that is, the nozzle cover 55. The first pipe 68 guides the cleaning liquid in the first container 67 into the space 61 described above, that is, into the nozzle cover 55.

  The first valve 69 is provided in a first pipe 68 positioned between the first container 67 and the nozzle cover 55 of each coloring nozzle 31. When the first valve 69 is opened, the cleaning liquid is supplied from the first container 67 into the space 61 in the space 61 described above, and when the first valve 69 is closed, the cleaning liquid is supplied from the first container 67 in the space 61 described above. The supply into the nozzle cover 55 is stopped. With the configuration described above, the cleaning liquid supply unit 65 supplies the cleaning liquid from the first container 67 into the nozzle cover 55.

  As shown in FIG. 3, the cleaning liquid discharge unit 66 includes a second container 70, a suction device 71, a second pipe 72, and a second valve 73.

  The second container 70 is a container that can store the cleaning liquid, and stores the cleaning liquid discharged from the nozzle 61 in the space 61 described above. One second container 70 may be provided corresponding to each coloring nozzle 31, or one second container 70 may be provided corresponding to all the coloring nozzles 31, one for each of the plurality of coloring nozzles 31. It may be provided correspondingly.

  The suction machine 71 is composed of, for example, a vacuum pump or a vacuum generator, and sucks the gas in the second container 70. The suction device 71 sucks the gas in the second container 70 to suck the cleaning liquid in the space 61 described above, that is, the nozzle cover 55 toward the second container 70.

  The second pipe 72 connects the suction device 71 and the second container 70 and communicates with the inside of the space 61 described above, that is, the nozzle cover 55. The second pipe 72 guides the cleaning liquid in the nozzle cover 55 in the space 61 described above into the second container 70.

  The second valve 73 is provided in the second pipe 72 located between the second container 70 and the nozzle cover 55 of each coloring nozzle 31. When the second valve 73 is opened, the cleaning liquid in the space 61, that is, the nozzle cover 55 is guided to the second container 70, and when the second valve 73 is closed, the cleaning liquid in the space 61, that is, the nozzle cover 55 is changed. The guiding into the second container 70 is stopped. With the above-described configuration, the cleaning liquid discharger 66 discharges the cleaning liquid in the space 61, that is, the nozzle cover 55 to the outside of the nozzle cover 55. The cleaning unit 64 configured as described above supplies a cleaning liquid into the nozzle cover 55 to clean at least the tip portion of the nozzle 54 on the electric wire 3 side.

  The coloring nozzle 31 having the above-described configuration guides the coloring material from the coloring material supply source 32 into the flow path 39 through the inflow pipe 36. When the coil 40 is not applied, the valve body 44 comes into contact with the proximal end portion 37 a of the first nozzle member 37 by the biasing force of the coil spring 42 to position the coloring material in the flow path 39. And when coloring the outer surface 3a of the electric wire 3, based on the command from the control apparatus 19, an electric current is applied to the coil 40 and it is attached to the disc part 46 against the biasing force of the coil spring 42. The valve body 44 is separated from the base end portion 37 a of the first nozzle member 37, and the coloring material in the flow path 39 is moved along the arrow Q between the first nozzle member 37 and the second nozzle member 50. Pass through. Then, the coloring nozzle 31 sprays the coloring material from the second nozzle member 50.

  In addition, when the coloring material is sprayed, a part of the coloring material that flows in the first nozzle member 37 and the second nozzle member 50 along the arrow Q along the axis R is part of the second nozzle member 50. Collides with the end face 50a. Then, a part of the coloring material colliding with the end face 50a generates a vortex and stirs the coloring material. And the density | concentration of the coloring material in the 2nd nozzle member 50 is kept uniform.

  Further, when the colorant is sprayed, the colorant flowing from the first nozzle member 37 toward the small diameter portion 152 of the second nozzle member 50 has a cross-sectional area of the flow path that is gradually reduced. When moving from the inside of the first nozzle member 37 to the second large diameter portion 151 of the second nozzle member 50, the flow velocity becomes faster, and when moving from the second large diameter portion 151 to the small diameter portion 152, The flow rate is even faster. Then, the liquid colorant having a high flow velocity is sprayed from the end surface 50 c of the small diameter portion 152 near the electric wire 3 toward the outer surface 3 a of the electric wire 3 or the like. In this way, the flow rate of the coloring material is gradually reduced from the first nozzle member 37 toward the small diameter portion 152 of the second nozzle member 50, so that the flow rate of the coloring material is adjusted to an optimum value for droplet ejection. At the same time, the spray amount of the coloring material is adjusted. In addition, the colorant is more easily cut by increasing the flow velocity.

  Note that when the coloring nozzle 31 colors the outer surface 3a of the electric wire 3, both the first valve 69 and the second valve 73 are closed, and the nozzle cover 55 is filled with the cleaning liquid. Absent.

  Further, the coloring nozzle 31 described above is applied to the coil 40 based on a command from the control device 19 when stopping the coloring of the outer surface 3a of the electric wire 3, that is, when stopping the spraying of the coloring material. Is stopped, and the valve body 44 is brought into contact with the proximal end portion 37 a of the first nozzle member 37. Then, as shown in FIG. 7, the coloring material in an increased flow rate positioned in the second large diameter portion 151 and the small diameter portion 152 of the second nozzle member 50 causes the second nozzle member 50 due to inertia. Move toward the electric wire 3 side, that is, into the first large-diameter portion 153. At this time, the colorant moves to the first large-diameter portion 153 having an inner diameter larger than that of the small-diameter portion 152, so that the flow rate of the colorant is delayed. The colorant whose flow rate has been slowed down in this way stops when the liquid level is flush with the tip surface 50b of the second nozzle member 50, and the colorant is prevented from jumping out of the second nozzle member 50.

  It should be noted that the amount of the coloring material accommodated in the nozzle 54 at the time when the spraying of the coloring material is stopped is such that the liquid surface of the coloring material is flush with the end face 50c of the small diameter portion 152 in a state where inertia does not act on the coloring material. Amount. That is, the coloring material that has moved from the second large diameter portion 151 and the small diameter portion 152 to the electric wire 3 side due to inertia is temporarily accommodated in the first large diameter portion 153.

  Then, as described above, when the flow rate of the coloring material is suppressed (delayed) and the liquid level is flush with the tip surface 50b of the second nozzle member 50, the color material moves into the first large diameter portion 153. The coloring material is pushed back to the small diameter portion 152 side by atmospheric pressure. The colorant pushed back in this way stops when the liquid level is flush with the end surface 50c of the small diameter portion 152 as shown in FIG. In this state, only the liquid surface of the colorant that is flush with the end surface 50c of the small-diameter portion 152 touches the air, and there is a bubble in the nozzle 54, that is, on the first nozzle member 37 side from the end surface 50c. Is prevented from flowing in.

  Further, in the coloring nozzle 31 described above, when the valve body 44 is positioned at the closed position and the spraying of the coloring material is stopped, both the first valve 69 and the second valve 73 are opened and suction is performed. The machine 71 sucks the gas in the second container 70, and the pressurized gas supply source 33 supplies the pressurized gas into the first container 67. Then, the cleaning liquid is supplied from the first container 67 into the space 61 described above, that is, into the nozzle cover 55. The cleaning liquid supplied into the space 61 is gradually filled between the nozzle 54 and the cover main body 56 without leaking out of the cover main body 56 from below due to the surface tension of the cleaning liquid itself. Then, when the cleaning liquid is filled in the space 61 described above, the cleaning liquid is guided to the second container 70.

  The coloring nozzle 31 opens the valves 69 and 73 for a predetermined time previously stored in the control device 19 such as 10 to 20 seconds, and supplies the cleaning liquid from the first container 67 into the space 61 described above. The cleaning liquid in the space 61 described above is accommodated in the second container 70. Thus, the coloring nozzle 31 rinses the tip of the nozzle 54 in the nozzle cover 55 on the wire 3 side with the cleaning liquid.

  Thereafter, the coloring nozzle 31 simultaneously closes the valves 69 and 73 based on a command from the control device 19. Then, the coloring nozzle 31 opens the first valve 69 for a very short second predetermined time stored in advance in the control device 19 such as 10 milliseconds, and then closes again based on a command from the control device 19. . Then, the liquid surface (also referred to as an interface) of the cleaning liquid in the space 61 described above is flush with the end surface 56a of the cover main body 56 of the nozzle cover 55 described above. Thereafter, the coloring nozzle 31 maintains this state for a third predetermined time stored in advance in the control device 19 based on a command from the control device 19. Further, at this time, after the second predetermined time has elapsed since the coloring nozzle 31 closed the second valve 73 instead of simultaneously closing the valves 69 and 73 based on a command from the control device 19, The first valve 69 may be closed.

  Then, the cleaning liquid dissolves or disperses the coloring material of the coloring material attached to the tip portion of the nozzle 54 of the coloring nozzle 31 on the electric wire 3 side, and removes it from the tip portion of the nozzle 54. Thus, the cleaning liquid removes the coloring material attached to the nozzle 54 from the nozzle 54 and cleans the nozzle 54.

The coloring nozzle 31 opens the second valve 73 in a state where the first valve 69 is closed based on a command from the control device 19, and the suction machine 71 removes the gas in the second container 70. Suction. Then, the cleaning liquid in the space 61, that is, the nozzle cover 55 described above is guided into the second container 70. Then, as shown in FIG. 9, the cleaning liquid in the space 61, that is, the nozzle cover 55 described above is discharged out of the nozzle cover 55. In this way, the cleaning unit 64 has the nozzle cover 55.
The tip portion on the wire 3 side of the nozzle 54 of the colored nozzle 31 is washed. When the discharge of the cleaning liquid in the space 61 is finished, the coloring nozzle 31 closes the second valve 73 described above. Then, the coloring nozzle 31 is cleaned with the cleaning liquid every fourth predetermined time stored in the control device 19 such as for 2 minutes until the outer surface 3a of the electric wire 3 is colored. Wash.

  When forming the mark 6 on the outer surface 3a of the electric wire 3 with the coloring apparatus 1 having the above-described configuration, that is, when coloring the outer surface 3a of the electric wire 3, the guide roll 11 is first attached to the frame 10. The pair of cutting blades 48 and 49 are separated from each other, and the electric wire 3 wound around the guide roll 11 is passed through the correction unit 13, the slack absorbing unit 14, the coloring unit 15, and the duct 16 in this order, and between the pair of delivery rolls 12. Between. And the coloring nozzle 31 is attached to the predetermined location of the unit main body 30 of the coloring unit 15, and the coloring material supply source 32 and the first container 67 are connected to each coloring nozzle 31. Further, the pressurized gas supply source 33 is connected to both the coloring material supply source 32 and the first container 67, and the gas in the duct 16 is sucked by the suction means.

  Then, the feed roll 12 is driven to rotate, the electric wire 3 is pulled from the guide roll 11 and moved along the longitudinal direction of the electric wire 3, and the frictional force of the first urging force H1 is applied to the electric wire 3 by the correction unit 13. And the electric wire 3 is stretched. The moving roller 26, that is, the electric wire 3 is urged by the air cylinder 27 with the second urging force H2. Further, as described above, the coloring material is supplied from the coloring material supply source 32 into the flow path 39 of the coloring nozzle 31, and the cleaning liquid is supplied from the first container 67 into the space 61 as described above.

  Then, when a pulse-like signal in a predetermined order is input from the encoder 17 to the control device 19, the control device 19 applies a predetermined time to the coil 40 of the coloring nozzle 31 at predetermined intervals. Then, the coloring nozzle 31 sprays the coloring material toward the outer surface 3a of the electric wire 3 by a certain amount. And the solvent or dispersion liquid mentioned above evaporates from the coloring material adhering to the outer surface 3a of the electric wire 3, and the outer surface 3a of the electric wire 3 is dyed with a dye, or a pigment is applied to the outer surface 3a. The solvent or dispersion evaporated from the coloring material attached to the outer surface 3 a of the electric wire 3 is sucked into the suction means from the duct 16. Thus, the outer surface 3a of the electric wire 3 is colored. Thereafter, the inside of the nozzle cover 55 is cleaned through the above-described order.

  When the control device 19 determines that the electric wire 3 having a predetermined length has been sent out based on information from the encoder 17 or the like, the control device 19 stops the sending roll 12. Then, in particular, the electric wire 3 is loosened between the pair of guide rollers 24 of the slack absorbing unit 14, and the moving roller 26 urged by the second urging force H2 is displaced to a position indicated by a two-dot chain line in FIG. . Then, the telescopic rod 29 of the air cylinder 27 of the slack absorbing unit 14 extends. The slack absorbing unit 14 absorbs slack in the electric wire 3.

  Then, the pair of cutting blades 48 and 49 approach each other, and the electric wire 3 is sandwiched between the cutting blades 48 and 49 and cut. In this way, the electric wire 3 in which the mark 6 is formed on the outer surface 3a shown in FIG.

  According to the present embodiment, when the coloring material is sprayed, when the coloring material moves from the first nozzle member 37 to the small diameter portion 152 of the second nozzle member 50, the flow velocity is increased, and the small diameter portion 152. Since the droplets are sprayed from the end face 50c near the electric wire 3, it is possible to adjust the spray amount of the coloring material and the like, and to improve the cutting of the coloring material. At the time of stopping the spraying of the coloring material, the coloring material in the state where the flow velocity in the small diameter portion 152 is increased moves into the first large diameter portion 153 due to inertia, and from the small diameter portion 152 to the first large diameter portion 153. The flow rate of the coloring material is slowed down when moving to a position where the liquid surface of the colorant is flush with the end surface of the first large diameter portion 153 closer to the article, that is, the front end surface 50b of the second nozzle member. Stop. Thereafter, the coloring material is pushed back to the small diameter portion 152 side by the atmospheric pressure, and stops at a position where the liquid level is flush with the end surface 50 c of the small diameter portion 152. Therefore, it is possible to prevent bubbles from flowing into the coloring nozzle 31, that is, the first nozzle member 37 side from the end face 50c, and therefore, the coloring nozzle 31 that can prevent dripping, nozzle clogging, defective droplet ejection direction, and the like. Can be provided.

In the embodiment described above, the first nozzle member 37 and the second nozzle member 50 are separated from each other. However, in the present invention, the first nozzle member 37 and the second nozzle member 50 may be integrated. In the above-described embodiment, the second nozzle member 50 is formed by one member, but may be formed by combining a plurality of members having different inner diameters. Further, in the above-described embodiment, the inner surface of the second nozzle member 50 is formed in a stepped shape, but in the present invention, the inner diameter is changed by forming the inner surface of the second nozzle member 50 in a tapered shape. You may make it let it .

  Furthermore, in this invention, you may use various things, such as an acrylic type coating material, ink (dye type | system | group, pigment type), and UV ink, as a coloring liquid and a coating material.

Furthermore, in embodiment mentioned above, it has described regarding the electric wire 3 which comprises the wire harness routed to a motor vehicle. However, in the present invention, it is needless to say that the electric wire 3 may be used not only for automobiles but also for various electronic devices such as portable computers and various electric machines.

  In the above-described embodiment, the coloring nozzle 31 that colors the outer surface 3a of the electric wire 3 is shown. However, the coloring nozzle 31 of the present invention may color various things in addition to the electric wire 3.

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

It is a side view which shows the structure of the coloring device of the electric wire which has the coloring nozzle concerning one Embodiment of this invention. It is sectional drawing of the coloring unit of the coloring device of the electric wire in alignment with the II-II line in FIG. It is explanatory drawing which shows the positional relationship of each coloring nozzle and electric wire of the coloring unit shown by FIG. It is sectional drawing which shows the structure of the nozzle unit of each coloring nozzle of the coloring unit shown by FIG. (A) is a perspective view of the electric wire colored with the electric wire coloring apparatus shown by FIG. (B) is a top view of the electric wire shown by Fig.5 (a). It is sectional drawing which expands and shows the principal part of the coloring nozzle shown by FIG. It is sectional drawing which shows the state of the coloring material at the time of the droplet spraying stop of the coloring nozzle shown by FIG. It is sectional drawing which shows the state by which the coloring material at the time of dripping stop was pushed back in the coloring nozzle from the state shown in FIG. It is sectional drawing which shows the state of the coloring material at the time of the dripping stop of the conventional coloring nozzle. FIG. 10 is a cross-sectional view illustrating a state in which bubbles have flowed into the flow path of the coloring nozzle in the state illustrated in FIG. 9.

Explanation of symbols

3 Electric wires (goods)
3a Outer surface 31 Colored nozzle 35 Insert member (accommodating part)
37 1st nozzle member 50 2nd nozzle member 151 2nd large diameter part 152 Small diameter part 153 1st large diameter part

Claims (1)

In a coloring nozzle that sprays a liquid coloring material by a certain amount toward the outer surface of the article, and attaches droplets of the coloring material to the outer surface of the article to color the article.
An accommodating portion for accommodating the coloring material;
A first nozzle member that is formed in a cylindrical shape having a constant inner diameter over its entire length, and that the coloring material flows inside and communicates with the housing portion;
And a second nozzle member that is formed in a cylindrical shape and is arranged closer to the article than the first nozzle member and connected to the first nozzle member, and the colorant flows inside. ,
The second nozzle member has a small-diameter portion having an inner diameter smaller than that of the first nozzle member, and a first large-diameter portion that is disposed closer to the article than the small-diameter portion and has an inner diameter larger than the small-diameter portion; A second large-diameter portion that is disposed closer to the first nozzle member than the small-diameter portion, and has an inner diameter larger than the small-diameter portion and smaller than the first nozzle member ,
The coloring nozzle , wherein an end surface of the second nozzle member near the first nozzle member protrudes from the inner surface of the first nozzle member toward the inside of the first nozzle member .

Images