JP4482290B2 - Coloring nozzle for electric wires - Google Patents

Description

【０１０５】
前述した表１に示した実験では、粘度が１０ｍＰａ・ｓ（ミリパスカル秒）程度の着色材を用い、第２のノズル部材５０をセラミックスから形成した。また、幅Ｗがｄ／８の比較例Ａと、幅Ｗがｄ／４の比較例Ｂと、幅Ｗがｄ／３の比較例Ｃを用いた。さらに、幅Ｗがｄ／７の本発明品Ａと、幅Ｗがｄ／６の本発明品Ｂと、幅Ｗがｄ／５の本発明品Ｃを用いた。
【０１０６】
表１によると、比較例Ａでは、第２のノズル部材５０に着色材が多少付着することが明らかとなった。比較例Ｂ及び比較例Ｃでは、第２のノズル部材５０に着色材が多々付着することが明らかとなった。これは、外周平坦面５３の幅Ｗが大きいためと考えられる。
【０１０７】
また、比較例Ａ、比較例Ｂ及び比較例Ｃでは、第２のノズル部材５０から滴射される着色材の液滴の量（体積）のばらつきが大きいことが明らかとなった。これは、前述したように、着色材が第２のノズル部材５０の特に外周平坦面５３に付着するためと考えられる。
【０１０８】
前述した比較例Ａ，Ｂ，Ｃに対し本発明品Ａ，Ｂ，Ｃでは、第２のノズル部材５０に着色材が殆ど付着しないことが明らかとなった。これは、外周平坦面５３の幅Ｗが十分に小さく、テーパ面５２により第２のノズル部材５０が徐々に先細に（徐々に細く）形成されているためと考えられる。
【０１０９】
また、本発明品Ａ，Ｂ，Ｃでは、第２のノズル部材５０から滴射される着色材の液滴の量（体積）のばらつきが殆どないことが明らかとなった。これは、前述したように、着色材が第２のノズル部材５０に殆ど付着しないためと考えられる。このため、本発明品Ａ，Ｂ，Ｃでは、第２のノズル部材５０から滴射される着色材の液滴がばらばらになることなく、該液滴の量（体積）のばらつきが殆どなくなることが明らかとなった。
【０１１０】
このように、表１に示す結果によれば、前述した式１を満たすことで、第２のノズル部材５０に着色材が殆ど付着しないとともに、滴射される着色材の液滴の量のばらつきが殆どないことが明らかとなった。したがって、式１を満たすことで、第１のノズル部材３７内から第２のノズル部材５０内に侵入すると、着色材は、打ち出されると液滴を保つように加圧されるとともに、所望の方向に向かって打ち出されるように加圧される。
【０１１１】
このため、着色材は、液滴の状態即ち滴の状態で電線３の外表面３ａに向かって確実に打ち出されるとともに電線３の外表面３ａの所望の位置に向かって確実に打ち出される。したがって、電線３の外表面３ａの所望の位置に向かって着色材を確実に一定量ずつ滴射することができ、電線３の外表面３ａの所望の位置を所望の色に着色できるとともに、着色した箇所即ち前述した点７を所望の面積（大きさ）に保つことができる。
【０１１２】
次に、前述した式１を満たす第２のノズル部材５０を種々の材質から構成したときの着色材の第２のノズル部材５０への付着状況及び滴射状況を確認した。結果を以下の表２に示す。
【表２】

【０１１３】
前述した表２に示した実験では、粘度が１０ｍＰａ・ｓ（ミリパスカル秒）程度の着色材を用い、外周平坦面５３の幅Ｗをｄ／６とした。また、第２のノズル部材５０がステンレス鋼からなる比較例Ｄと、第２のノズル部材５０がプラスチックからなる比較例Ｅと、第２のノズル部材５０がプラスチックからなる比較例Ｆを用いた。さらに、第２のノズル部材５０が前述したセラミックスからなる本発明品を用いた。
【０１１４】
表２によると、比較例Ｄ、比較例Ｅ及び比較例Ｆでは、第２のノズル部材５０に着色材が多々付着することが明らかとなった。さらに、比較例Ｄ、比較例Ｅ及び比較例Ｆでは、第２のノズル部材５０に着色材が多々付着するため、第２のノズル部材５０から滴射される着色材の液滴の量（体積）のばらつきが大きいことが明らかとなった。これらの比較例Ｄ，Ｅ，Ｆに対し本発明品では、第２のノズル部材５０に着色材が殆ど付着せずに、第２のノズル部材５０から滴射される着色材の液滴の量（体積）のばらつきが殆どないことが明らかとなった。
【０１１５】
このように、表２に示す結果によれば、第２のノズル部材５０をセラミックスから構成することで、第２のノズル部材５０に着色材が殆ど付着しないことが明らかとなった。第２のノズル部材５０をセラミックスから構成することで、第２のノズル部材５０に着色材が付着しにくくなっている。このため、勿論、第２のノズル部材５０などに付着した着色材が、滴射された着色材の滴射される方向に影響を与えることを防止できる。したがって、電線３の外表面３ａの所望の位置に向かって着色材を確実に一定量ずつ滴射することができ、電線３の外表面３ａの所望の位置を所望の色に着色できるとともに、着色した箇所即ち前述した点７を所望の面積（大きさ）に保つことができる。
【０１１６】
さらに、本発明では、着色液及び塗料として、アクリル系塗料、インク（染料系、顔料系）、ＵＶインクなどの種々のものを用いても良い。
【０１１７】
なお、前述した実施形態は本発明の代表的な形態を示したに過ぎず、本発明は、実施形態に限定されるものではない。即ち、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。
【０１１８】
【発明の効果】
以上説明したように請求項１に記載の本発明は、テーパ面即ちノズル部材に着色材が付着しにくくなっている。このように、着色材がノズル部材に付着することを防止できるので、ノズル部材から一定量ずつ確実に電線の外表面に向かって着色材を滴射できる。
【０１１９】
また、着色材がノズル部材に付着することを防止できるので、勿論、第２のノズル部材などに付着した着色材が、滴射された着色材の滴射される方向に影響を与えることを防止できる。したがって、電線の外表面の所望の位置に向かって着色材を確実に一定量ずつ滴射することができ、電線の外表面の所望の位置を所望の色に着色できるとともに、着色した箇所を所望の面積（大きさ）に保つことができる。
【０１２０】
テーパ面とノズル部材の開口部との間に着色材が流れる方向に対し直交する方向に平坦な外周平坦面を設けている。このため、ノズル部材を容易に加工でき、容易に製造できる。
【０１２１】
着色材が外周平坦面即ちノズル部材に付着しにくくなっている。このため、ノズル部材から一定量ずつ確実に電線の外表面に向かって着色材を滴射できる。したがって、電線の外表面の所望の位置に向かって着色材を確実に一定量ずつ滴射することができ、電線の外表面の所望の位置を所望の色に着色できるとともに、着色した箇所を所望の面積（大きさ）に保つことができる。
【０１２２】
請求項２に記載の本発明は、ノズル部材がセラミックスからなり、ノズル部材に着色材が付着しにくくなっている。このため、勿論、ノズル部材などに付着した着色材が、滴射された着色材の滴射される方向に影響を与えることを防止できる。したがって、電線の外表面の所望の位置に向かって着色材を確実に一定量ずつ滴射することができ、電線の外表面の所望の位置を所望の色に着色できるとともに、着色した箇所を所望の面積（大きさ）に保つことができる。
【図面の簡単な説明】
【図１】本発明の一実施形態にかかる電線の着色装置の構成を示す側面図である。
【図２】図１中のＩＩ−ＩＩ線に沿う電線の着色装置の着色ユニットの断面図である。
【図３】図２に示された着色ユニットの各着色ノズルと電線との位置関係を示す説明図である。
【図４】図２に示された着色ユニットの各着色ノズルの構成を示す断面図である。
【図５】図４に示された着色ノズルの第１のノズル部材と第２のノズル部材などを示す断面図である。
【図６】（ａ）は図１に示された電線の着色装置で着色された電線の斜視図である。
（ｂ）は図６（ａ）に示された電線の平面図である。
【図７】図４に示された着色ノズルから着色材が滴射される状態を説明する説明図である。
【符号の説明】
３ 電線
３ａ 外表面
３１ 電線用着色ノズル
３５ インサート部材（収容部）
５０ 第２のノズル部材（ノズル部材）
５０ｂ 先端部
５０ｃ 開口部
５２ テーパ面
５３ 外周平坦面
Ｑ 着色材が流れる方向[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coloring nozzle for electric wires used when coloring an electric wire provided with a conductive core wire and an insulating covering portion covering the core wire.
[0002]
[Prior art]
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 connectors attached to ends of the electric wires.
[0003]
The electric wire includes 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 includes a terminal fitting and a connector housing that accommodates 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. .
[0004]
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.
[0005]
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.
[0006]
Therefore, when an electric wire used in a wire harness is extruded and coated around the core wire with the synthetic resin constituting the covering portion described above, a colorant of a desired color is mixed into the synthetic resin constituting the covering portion, 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.
[0007]
Alternatively, the color of the colorant mixed in the synthetic resin has been changed while the extrusion coating apparatus performs extrusion coating. In this case, after changing the color of the colorant, the color of the synthetic resin constituting the covering portion is a color in which the color of the colorant before the change of the covering portion and the color of the colorant after the change are mixed. Become. For this reason, it was in the tendency for the material yield of an electric wire to fall.
[0008]
In order to prevent the reduction in the productivity of the wires and the reduction in the material yield of the wires, the applicant of the present invention, for example, manufactures a single-color wire and, if necessary, the outer surface of the wire as desired. It has been proposed to assemble a wire harness by coloring it (see Patent Document 4). Further, 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, and drops the coloring material droplets on the electric wire. An electric wire coloring device for coloring an electric wire to a desired color by adhering to the outer surface has been proposed (see Patent Document 5).
[0009]
[Patent Document 1]
JP-A-5-111947 [Patent Document 2]
JP-A-6-198133 [Patent Document 3]
JP-A-9-92056 [Patent Document 4]
Japanese Patent Application No. 2001-256721 [Patent Document 5]
Japanese Patent Application No. 2002-233729 [0010]
[Problems to be solved by the invention]
The above-mentioned colorant that is sprayed by a certain amount toward the outer surface of the electric wire 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.
[0011]
For this reason, in the above-described proposed wire coloring device, when the above-described coloring material spraying from a coloring nozzle or the like is repeated, the above-described dye or pigment adheres to the nozzle, and the attached dye or pigment gradually decreases. It is possible to increase. If the coloring material adheres to the coloring nozzle, it is considered that it is difficult to spray the coloring material from the coloring nozzle in a desired direction and it is difficult to spray the coloring material by a certain amount.
[0012]
In this case, of course, it becomes difficult to color the desired position of the electric wire, and the area (size) of the portion where the coloring material of the electric wire adheres varies. As described above, it is considered that the above-described dye or pigment adheres to the nozzle, and it is difficult to reliably spray the coloring material by a certain amount toward a desired position on the outer surface of the electric wire.
[0013]
Therefore, the objective of this invention is providing the coloring nozzle for electric wires which can spray a coloring material reliably by a fixed amount toward a desired position of the outer surface of an electric wire.
[0014]
[Means for Solving the Problems]
In order to solve the problems and achieve the object, the coloring nozzle for electric wire according to the present invention according to claim 1, the liquid coloring material is sprayed by a certain amount toward the outer surface of the electric wire, and the coloring material. In the coloring nozzle for an electric wire, which attaches the liquid droplets to the outer surface of the electric wire and colors the electric wire, an accommodating portion that accommodates the coloring material, a cylindrical shape and the coloring material flows inside, and the accommodating A second nozzle member that is connected to the first nozzle member that communicates with the inside of the portion and has a constant inner diameter over the entire length; and a tip of the second nozzle member that is closer to the wire and is provided on the wire. A taper surface that gradually tapers the second nozzle member as it goes , and an outer periphery of the opening facing the electric wire of the second nozzle member and an inner periphery of the taper surface, The second nozzle part It includes an outer peripheral flat surface which is formed flat along an inner in the direction perpendicular to the flow direction the coloring material, and the inner diameter of the second nozzle member is d, the outer peripheral flat surface the second When the radial width of the nozzle member is W, d / 7 ≦ W ≦ d / 5 is satisfied .
[0017]
Electric wire coloring nozzle of the present invention described in claim 2 is the electric wire coloring nozzle according to claim 1, wherein the nozzle member is characterized in that it consists of ceramic.
The coloring nozzle for electric wires according to a third aspect of the present invention is the coloring nozzle for electric wires according to the first or second aspect, wherein the first nozzle member is formed in a cylindrical shape and the inner diameter is the second. And a step projecting inward from the inner surface of the first nozzle member is provided between the first nozzle member and the second nozzle member. It is characterized by having.
[0018]
According to the first aspect of the present invention, the tapered surface provided at the tip of the nozzle member gradually tapers (thinens) the nozzle member gradually toward the electric wire. For this reason, a coloring material becomes difficult to adhere to a taper surface.
[0019]
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 coating portion is colored with the coloring liquid, the dye penetrates into the coating portion, and when the outer surface of the coating portion is colored with the paint, the pigment adheres to the outer surface without penetrating into the coating portion. That is, to color the outer surface of the electric wire in this specification means to dye a part of the outer surface of the electric wire with a dye and to apply a pigment to a part of the outer surface of the electric wire.
[0020]
Further, the solvent and the dispersion liquid are preferably those having an affinity for the synthetic resin constituting the covering portion. In this case, the dye is surely soaked into the coating part, and the pigment is reliably adhered to the outer surface of the coating part.
[0021]
Further, the droplet ejection described in the present specification indicates that the liquid coloring material is urged and ejected toward the outer surface of the electric wire in a droplet state, that is, a droplet state, from the coloring nozzle. .
[0022]
Outer peripheral flat surface provided between the opening of the tape over tapered surface and the nozzle member is flat in the direction perpendicular to the direction in which the coloring material flows. For this reason, a nozzle member can be processed easily and can be manufactured easily.
[0023]
Width W of the outer peripheral flat surface, has a and a 1/5 1/7 more than the internal diameter d of the nozzle member. For this reason, it is difficult for the coloring material to adhere to the outer peripheral flat surface.
[0024]
According to the second aspect of the present invention, the nozzle member is made of ceramics. For this reason, it is difficult for the coloring material to adhere to the nozzle member.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
A wire coloring nozzle (hereinafter simply referred to as a coloring nozzle) 31 according to an embodiment of the present invention will be described below with reference to FIGS. The coloring nozzle 31 shown in FIG. 4 or the like constitutes an electric wire coloring device (hereinafter simply referred to as a coloring device) 1 shown in FIG. The coloring apparatus 1 is an apparatus that cuts the electric wire 3 into a predetermined length and forms a mark 6 on a part of the outer surface 3 a of the electric wire 3. That is, the coloring device 1 colors the outer surface 3a of the electric wire 3, that is, marks.
[0026]
The electric wire 3 constitutes a wire harness routed to an automobile as a moving body. As shown in FIG. 6A, the electric wire 3 includes a conductive core wire 4 and an insulating covering portion 5. The core wire 4 is formed by twisting a plurality of conductive wires. The conducting wire constituting the core wire 4 is made of a conductive metal.
[0027]
Moreover, the core wire 4 may be comprised from one conducting wire. 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.
[0028]
The covering portion 5 is a single color P. In addition, a desired colorant may be mixed into 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 colorant 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 colorant into 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” means that the outer surface 3a of the electric wire 3 is the color of the synthetic resin itself without mixing the colorant into the synthetic resin constituting the covering portion 5.
[0029]
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. 6). 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.
[0030]
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.
[0031]
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.
[0032]
As shown in FIG. 1, the coloring apparatus 1 includes a frame 10 as a main body of the apparatus, a guide roll 11, a feed roll 12 as a moving means, a correction unit 13 as a wire straightening means, and a slack as a slack absorbing means. An absorption unit 14, a coloring unit 15, a duct 16, an encoder 17 as measurement means, a cutting mechanism 18 as processing means, and a control device 19 as control means are provided.
[0033]
The frame 10 is installed on a floor of a factory or the like. The frame 10 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.
[0034]
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.
[0035]
The delivery roll 12 forms a pulling means that pulls and moves the electric wire 3 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 so that the coloring nozzle 31 described later of the coloring unit 15 and the electric wire 3 are relatively moved 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.
[0036]
The correction unit 13 is provided on the delivery roll 12 side of the guide roll 11, and is provided between the guide roll 11 and the delivery roll 12. That is, the correction unit 13 is provided on the downstream side in the movement direction K of the electric wire 3 from the guide roll 11, and is provided on the upstream side in the movement direction K of the electric wire 3 from the delivery roll 12. The correction unit 13 includes a plate-like unit main body 20, a plurality of first rollers 21, and a plurality of second rollers 22. The unit main body 20 is fixed to the frame 10.
[0037]
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.
[0038]
The correction unit 13 sandwiches the electric wire 3 fed from the guide roll 11 by the feed roll 12 between the first roll 21 and the second roll 22. And the correction unit 13 makes the electric wire 3 linear. Further, the correction unit 13 imparts a frictional force to the electric wire 3 by being sandwiched between the first roll 21 and the second roll 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.
[0039]
The slack absorbing unit 14 is provided on the delivery roll 12 side of the correction unit 13, and is provided between the correction unit 13 and the delivery roll 12. That is, the slack absorbing unit 14 is provided downstream of the correction unit 13 in the movement direction K of the electric wire 3, and is provided upstream of the feeding roll 12 in the movement 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.
[0040]
As shown in FIG. 1, the slack absorbing unit 14 includes a pair of guide roller support frames 23, a pair of guide rollers 24, a move roller support frame 25, a move roller 26, and an air cylinder 27 as a biasing means. It has. The guide roller support frame 23 is fixed to the frame 10. The guide roller support frame 23 is erected upward from the frame 10. The pair of guide roller support frames 23 are arranged along the moving direction K of the electric wire 3 with a space therebetween.
[0041]
The pair of guide rollers 24 is rotatably supported by the guide roller support frame 23. 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.
[0042]
The moving roller support frame 25 is fixed to the frame 10. The moving roller support frame 25 is erected upward from the frame 10. The moving roller support frame 25 is provided between the pair of guide roller support frames 23.
[0043]
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 moving roller 26 is provided at the center between the guide rollers 24.
[0044]
The air cylinder 27 includes a cylinder body 28 and an extendable rod 29 that can be extended and retracted from the cylinder body 28. The cylinder body 28 is fixed to the moving roller support frame 25 and is disposed above the electric wire 3. The telescopic rod 29 extends downward from the cylinder body 28. That is, the telescopic rod 29 extends from the cylinder body 28 in a direction approaching the electric wire 3.
[0045]
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). ) Urge downward along the direction. For this reason, the air cylinder 27 urges the moving roller 26 in a direction approaching the electric wire 3 with the second urging force H2. The second urging force H2 is weaker than the first urging force H1.
[0046]
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 guide rollers 24 described above along the direction orthogonal (crossing) to the moving direction K, absorbs the slack, and stretches the wire 3. Keep on.
[0047]
The coloring unit 15 is provided on the feeding roll 12 side of the slack absorbing unit 14, and is provided between the slack absorbing unit 14 and the sending roll 12. That is, the coloring unit 15 is provided downstream of the slack absorbing unit 14 in the movement direction K of the electric wire 3, and is provided upstream of the feeding roll 12 in the movement direction K of the electric wire 3. For this reason, the coloring unit 15, that is, a coloring nozzle 31 described later, is disposed between the feed roll 12 and the correction unit 13.
[0048]
As shown in FIG. 2, the coloring unit 15 includes a unit main body 30, a plurality of coloring nozzles 31, and a plurality of coloring material supply sources 32 (only one is shown in the figure and the others are omitted). And a pressurized gas supply source 33. The unit main body 30 is fixed to the frame 10. The unit main body 30 supports a plurality of coloring nozzles 31.
[0049]
The coloring nozzle 31 having the above-described configuration drops a liquid coloring material from a coloring material supply source 32 (described later) toward the outer surface 3 a of the electric wire 3 by a predetermined amount. The coloring nozzle 31 attaches droplets of the sprayed coloring material to the outer surface 3a of the electric wire 3 to color (mark) at least a part of the outer surface 3a of the electric wire 3. The detailed configuration of the coloring nozzle 31 will be described later.
[0050]
Further, the coloring nozzles 31 are attached to the unit main body 30 and arranged in a plurality along the movement direction K of the electric wire 3 and are arranged in a plurality along the circumferential direction around 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. The unit main body 30 has three colored nozzles 31 arranged along the circumferential direction around the electric wire 3.
[0051]
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. The coloring nozzle 31 having the above-described configuration serves as a coloring means.
[0052]
The coloring material supply source 32 stores 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.
[0053]
The pressurized gas supply source 33 supplies the pressurized gas into the coloring material supply source 32. The pressurized gas supply source 33 supplies the pressurized gas into the coloring material supply source 32, so that when the valve body 44 of the coloring nozzle 31 is separated from the base end portion 37 a of the first nozzle member 37, The coloring material in the passage 39 is rapidly sprayed from the first nozzle member 37 and the second nozzle member 50.
[0054]
The coloring unit 15 having the above-described configuration is applied to the coil 40 of any coloring nozzle 31 based on a command from the control device 19, and the valve body 44 is separated from the base end portion 37 a of the first nozzle member 37. Then, the coloring unit 15 sprays a certain amount of the coloring material in the flow path 39 of the arbitrary coloring nozzle 31 toward the electric wire 3.
[0055]
In the present specification, a colorant having a viscosity of about 10 mPa · s (millipascal second) 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.
[0056]
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, the coloring unit 15 dyes a part of the outer surface 3 a of the electric wire 3 with a dye or applies a pigment to the outer surface 3 a of the electric wire 3. For this reason, 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. Show.
[0057]
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.
[0058]
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.
[0059]
The duct 16 is provided on the feeding roll 12 side of the coloring unit 15, and is provided between the coloring unit 15 and the sending roll 12. That is, the duct 16 is provided on the downstream side in the moving direction K of the electric wire 3 from the coloring unit 15, and is provided on the upstream side in the moving direction K of the electric wire 3 from the delivery roll 12. 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.
[0060]
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 includes 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.
[0061]
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.
[0062]
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 includes 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.
[0063]
The control device 19 is a computer including 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, and the like, and controls the entire coloring device 1 by controlling these operations.
[0064]
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. Based on the amount of movement of the electric wire 3 measured by the encoder 17, the control device 19 causes the coloring nozzle 31 to spray the coloring material by a certain amount.
[0065]
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.
[0066]
As shown in FIG. 4, the coloring nozzle 31 includes a cylindrical nozzle main body 34, an insert member 35 accommodated in the nozzle main body 34, an inflow pipe 36, a first nozzle member 37, and a valve mechanism 38. And a second nozzle member 50 as a nozzle member and a connection pipe 51.
[0067]
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 the coloring material supply source 32 or the like. 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.
[0068]
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 to the outside of the coloring nozzle 31. The inner diameter D 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.
[0069]
The valve mechanism 38 includes a coil 40, a valve 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. The coil 40 is applied from the outside. The valve main body 41 includes a conductive main body 43 and a valve body 44. The main body portion 43 is integrally provided with a cylindrical columnar portion 45 and a disk-shaped disc portion 46 connected to one end of the cylindrical portion 45.
[0070]
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 main body 34.
[0071]
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. The valve body 44 contacts and separates from the proximal end portion 37 a of the first nozzle member 37. In addition, approaching / separating means approaching or leaving.
[0072]
When the valve body 44 comes into contact with the base end portion 37 a of the first nozzle member 37, the valve body 44 is kept watertight between the base end portion 37 a and the coloring material in the flow path 39 enters the first nozzle member 37. To prevent. Further, when the valve body 44 is separated from the base end portion 37 a of the first nozzle member 37, the coloring material passes through the first nozzle member 37 and the second nozzle member 50 and faces the outer surface 3 a of the electric wire 3. It is allowed to be dripped.
[0073]
Thus, the valve body 44 contacts and separates from the proximal end portion 37a over the open position indicated by the two-dot chain line in FIG. 4 and the closed position indicated by the solid line in FIG. In the open position, the valve body 44 moves away 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.
[0074]
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.
[0075]
The second nozzle member 50 is formed in a cylindrical shape. The second nozzle member 50 is made of ceramics. The outer diameter of the second nozzle member 50 on the side away from the electric wire 3 (also referred to as the first nozzle member 37 side or the base end side) is equal to the outer diameter of the first nozzle member 37.
[0076]
Further, as shown in FIG. 5, the inner diameter d of the second nozzle member 50 is smaller than the inner diameter D of the first nozzle member 37, and is formed constant in the arrow Q direction. The second nozzle member 50 is arranged coaxially with the first nozzle member 37 and is connected to the first nozzle member 37. For this reason, the first nozzle member 50 communicates with the inside of the insert member 35, that is, the flow path 39 via the first nozzle member 37.
[0077]
The second nozzle member 50 is arranged closer to the electric wire 3 than 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. The arrow Q indicates the direction in which the coloring material flows.
[0078]
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. Further, the end face 50a is formed flat along a direction orthogonal (crossing) to the arrow Q. The end surface 50 a has a step, and is formed between the first nozzle member 37 and the second nozzle member 50.
[0079]
Further, as shown in FIG. 5, a tapered surface 52 is formed on the outer peripheral surface of the tip portion 50 b of the second nozzle member 50 near the electric wire 3, and the second nozzle member 50 is close to the electric wire 3. An outer peripheral flat surface 53 is provided at the tip 50b. That is, the second nozzle member 50 includes a tapered surface 52 and an outer peripheral flat surface 53.
[0080]
The tapered surface 52 gradually tapers (thinns) the second nozzle member 50 toward the electric wire 3, that is, the opening 50 c facing the electric wire 3 of the second nozzle member 50. The tapered surface 52 is provided over the entire periphery of the opening 50c. An angle θ (shown in FIG. 5) between the tapered surface 52 and the arrow Q is 45 degrees (degree) or more. The angle θ is inclined with respect to the outer peripheral flat surface 53 of the tapered surface 52.
[0081]
The outer peripheral flat surface 53 is opposed to the outer peripheral surface 3a of the electric wire 3 and is provided on the outer periphery of the opening 50c over the entire periphery. For this reason, the outer peripheral flat surface 53 is provided between the opening 50 c and the tapered surface 52. That is, the outer peripheral flat surface 53 is provided on the outer periphery of the opening 50 c and on the inner periphery of the tapered surface 52, and is continuous with both the inner surface of the second nozzle member 50 and the tapered surface 52. The outer peripheral flat surface 53 is formed in an annular shape. The outer peripheral flat surface 53 is formed flat along a direction orthogonal to the arrow Q. The opening 50c, the tapered surface 52, and the outer peripheral flat surface 53 are arranged coaxially with each other.
[0082]
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.
[0083]
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. In a state where the coil 40 is not applied, the biasing force of the coil spring 42 causes the valve body 44 to contact the proximal end portion 37 a of the first nozzle member 37, and the coloring material is positioned in the flow path 39. ing.
[0084]
When the coloring nozzle 31 is applied to the coil 40, the valve body 44 attached to the disk portion 46 is against the biasing force of the coil spring 42 from the proximal end portion 37 a of the first nozzle member 37. The colorant in the flow path 39 is separated, and the inside of the first nozzle member 37 and the second nozzle member 50 is passed along the arrow Q. Then, the coloring nozzle 31 sprays the coloring material from the second nozzle member 50. Further, the coil 40 is applied for a predetermined time based on a command from the control device 19. For this reason, the coloring nozzle 31 sprays the coloring material toward the outer surface 3 a of the electric wire 3 by a certain amount.
[0085]
Further, in the coloring nozzle 31 described above, when the inner diameter of the second nozzle member 50 is d and the width of the outer peripheral flat surface 53 in the radial direction of the second nozzle member 50 is W, the relationship represented by the following formula 1 is satisfied. Meet.
d / 7 ≦ W ≦ d / 5 …… Equation 1
[0086]
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 is connected to each coloring nozzle 31. Further, the pressurized gas supply source 33 is connected to the coloring material supply source 32, and the gas in the duct 16 is sucked by the suction means.
[0087]
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.
[0088]
When a pulse 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.
[0089]
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.
[0090]
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.
[0091]
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. 6 and the like is obtained.
[0092]
Further, when the liquid colorant is sprayed from the coloring nozzle 31 described above toward the outer surface 3a of the electric wire 3 by a certain amount, the first nozzle member 37 and the second nozzle along the arrow Q along the axis R. A part of the coloring material flowing in the member 50 collides with the end surface 50 a of the second nozzle member 50. Then, a part of the coloring material colliding with the end face 50a generates a vortex indicated by an arrow S in FIG. 7 and stirs the coloring material. And the density | concentration of the coloring material in the 2nd nozzle member 50 is kept uniform.
[0093]
Further, when the liquid coloring material is sprayed from the coloring nozzle 31 to the outer surface 3a of the electric wire 3 by a certain amount, when the coloring material enters the first nozzle member 37 from the flow path 39, The pressure of the colorant increases. The pressure of the coloring material is substantially constant in the first nozzle member 37. When a part of the coloring material collides with the end face 50a, the pressure of the coloring material increases rapidly. And if it sprays toward the outer surface 3a etc. of the electric wire 3 from the 2nd nozzle member 50, the pressure of a coloring material will fall rapidly.
[0094]
Further, when the liquid coloring material is sprayed from the coloring nozzle 31 to the outer surface 3a of the electric wire 3 by a certain amount, when the coloring material enters the first nozzle member 37 from the flow path 39, The flow rate (speed) of the coloring material is lowered. The flow rate (speed) of the coloring material is substantially constant in the first nozzle member 37 and gradually decreases toward the second nozzle member 50.
[0095]
When a part of the coloring material collides with the end face 50a, the flow rate (speed) of the coloring material increases rapidly. When the droplets are sprayed from the second nozzle member 50 toward the outer surface 3a of the electric wire 3, the speed of the coloring material is kept high. As described above, when the coloring material enters the second nozzle member 50, the pressure and flow velocity (speed) of the coloring material are rapidly increased or increased. Then, the liquid coloring material having a high pressure and a high flow velocity is sprayed toward the outer surface 3 a of the electric wire 3.
[0096]
According to the present embodiment, the tapered surface 52 provided at the tip 50b of the second nozzle member 50 gradually tapers (thinens) the second nozzle member 50 toward the electric wire 3. . For this reason, it is difficult for the coloring material to adhere to the tapered surface 52, that is, the second nozzle member 50. As described above, since the coloring material can be prevented from adhering to the second nozzle member 50, the coloring material can be reliably sprayed from the second nozzle member 50 toward the outer surface of the electric wire by a certain amount.
[0097]
Further, since it is possible to prevent the coloring material from adhering to the second nozzle member 50, of course, the coloring material adhering to the second nozzle member 50 or the like has an influence on the direction in which the dropped coloring material is sprayed. Can be prevented. Accordingly, the coloring material can be reliably sprayed in a certain amount toward the desired position of the outer surface 3a of the electric wire 3, the desired position of the outer surface 3a of the electric wire 3 can be colored in a desired color, and coloring The location (corresponding to the point 7 described above) can be kept in a desired area (size).
[0098]
An outer peripheral flat surface 53 provided between the tapered surface 52 and the opening 50c of the second nozzle member 50 is flat in a direction orthogonal to the direction Q in which the coloring material flows. For this reason, the 2nd nozzle member 50 can be processed easily, and can be manufactured easily.
[0099]
The coloring material collides with the end face 50a of the second nozzle member 50 and is agitated. In addition, since the first nozzle member 37 and the second nozzle member 50 are arranged coaxially and the end face 50a is orthogonal (intersects) with respect to the arrow Q, the colorant is more reliably agitated. For this reason, the density | concentration of the dye or pigment in a coloring material is kept uniform. For this reason, it is possible to prevent the coloring material having an extremely high concentration from adhering to the coloring nozzle 50.
[0100]
Moreover, when it penetrates into the 2nd nozzle member 50 from the inside of the 1st nozzle member 37, a coloring material will be pressurized rapidly. For this reason, the coloring material sprayed from the second nozzle member 50 toward the outer surface 3 a of the electric wire 3 is vigorously driven toward the outer surface 3 a of the electric wire 3. For this reason, it is possible to prevent the coloring material from adhering to the second nozzle member 50.
[0101]
While the electric wire 3 and the coloring nozzle 31 are relatively moved along the longitudinal direction of the electric wire 3, the coloring nozzle 31 sprays the coloring material toward the electric wire 3 by a certain amount. Thus, the electric wire 3 is colored during the relative movement of the electric wire 3 and the coloring nozzle 31. For this reason, since it is not necessary to stop the electric wire 3 in order to color the electric wire 3, work efficiency is not reduced. Further, since the coloring material is sprayed by a certain amount toward the electric wire 3 during relative movement between the electric wire 3 and the coloring nozzle 31, any position of the electric wire 3 can be colored, and of course, the electric wire 3 is colored continuously. it can.
[0102]
The encoder 17 measures the movement amount of the electric wire 3, and the control device 19 controls the coloring nozzle 31 according to the movement amount of the electric wire 3. For this reason, when the moving speed of the electric wire 3 is increased, the interval at which the coloring material is sprayed can be shortened, and when the moving speed of the electric wire 3 is decreased, the interval at which the coloring material is sprayed can be increased. Thus, even if the moving speed of the electric wire 3 changes, the space | interval of the coloring material adhering to the outer surface 3a of the electric wire 3 can be kept constant.
[0103]
Therefore, even if the moving speed of the electric wire 3 changes, the coloring material can be attached to the outer surface 3a of the electric wire 3 according to a predetermined pattern. That is, even if the moving speed of the electric wire 3 changes, the electric wire 3 can be colored according to a predetermined pattern.
[0104]
Next, the inventors of the present invention actually confirmed the effect of the coloring nozzle 31 having the above-described configuration. First, the state of adhesion of the coloring material to the second nozzle member 50 and the state of droplet spraying when the width W of the outer peripheral flat surface 53 was varied were confirmed. The results are shown in Table 1 below.
[Table 1]

[0105]
In the experiment shown in Table 1 described above, the second nozzle member 50 was formed from ceramics using a coloring material having a viscosity of about 10 mPa · s (millipascal second). Further, Comparative Example A having a width W of d / 8, Comparative Example B having a width W of d / 4, and Comparative Example C having a width W of d / 3 were used. Furthermore, the present invention product A having a width W of d / 7, the present invention product B having a width W of d / 6, and the present invention product C having a width W of d / 5 were used.
[0106]
According to Table 1, in Comparative Example A, it became clear that the coloring material slightly adhered to the second nozzle member 50. In Comparative Example B and Comparative Example C, it became clear that a large amount of coloring material adhered to the second nozzle member 50. This is considered because the width W of the outer peripheral flat surface 53 is large.
[0107]
Further, in Comparative Example A, Comparative Example B, and Comparative Example C, it has been clarified that the variation in the amount (volume) of the colorant droplets sprayed from the second nozzle member 50 is large. This is considered because the coloring material adheres to the outer peripheral flat surface 53 of the second nozzle member 50 as described above.
[0108]
In contrast to the above-described Comparative Examples A, B, and C, it was found that the coloring materials hardly adhered to the second nozzle member 50 in the products A, B, and C of the present invention. This is presumably because the width W of the outer peripheral flat surface 53 is sufficiently small and the second nozzle member 50 is gradually tapered (gradually narrowed) by the tapered surface 52.
[0109]
In addition, in the products A, B, and C of the present invention, it has been clarified that there is almost no variation in the amount (volume) of the colorant droplets sprayed from the second nozzle member 50. This is considered because the coloring material hardly adheres to the second nozzle member 50 as described above. For this reason, in the products A, B, and C of the present invention, the droplets of the coloring material sprayed from the second nozzle member 50 are not separated, and there is almost no variation in the amount (volume) of the droplets. Became clear.
[0110]
As described above, according to the results shown in Table 1, when the above-described Expression 1 is satisfied, the coloring material hardly adheres to the second nozzle member 50, and the variation in the amount of droplets of the coloring material to be sprayed is obtained. It became clear that there was almost no. Therefore, by satisfying the expression 1, when entering the second nozzle member 50 from the first nozzle member 37, the colorant is pressurized so as to keep the droplets when ejected, and in a desired direction. Pressurized so as to be ejected toward.
[0111]
For this reason, the coloring material is reliably ejected toward the outer surface 3a of the electric wire 3 in a droplet state, that is, in a droplet state, and is reliably ejected toward a desired position on the outer surface 3a of the electric wire 3. Accordingly, the coloring material can be reliably sprayed in a certain amount toward the desired position of the outer surface 3a of the electric wire 3, the desired position of the outer surface 3a of the electric wire 3 can be colored in a desired color, and coloring Thus, the above-described point 7 can be maintained in a desired area (size).
[0112]
Next, the state of adhesion of the coloring material to the second nozzle member 50 and the state of droplet spraying when the second nozzle member 50 satisfying the above-described formula 1 was made of various materials were confirmed. The results are shown in Table 2 below.
[Table 2]

[0113]
In the experiment shown in Table 2 described above, a colorant having a viscosity of about 10 mPa · s (millipascal second) was used, and the width W of the outer peripheral flat surface 53 was set to d / 6. Further, Comparative Example D in which the second nozzle member 50 is made of stainless steel, Comparative Example E in which the second nozzle member 50 is made of plastic, and Comparative Example F in which the second nozzle member 50 is made of plastic were used. Furthermore, the product of the present invention in which the second nozzle member 50 is made of the ceramics described above was used.
[0114]
According to Table 2, in Comparative Example D, Comparative Example E, and Comparative Example F, it became clear that a large amount of coloring material adhered to the second nozzle member 50. Further, in Comparative Example D, Comparative Example E, and Comparative Example F, since a large amount of coloring material adheres to the second nozzle member 50, the amount (volume) of the coloring material droplets sprayed from the second nozzle member 50 is reduced. ) Was found to have a large variation. With respect to these comparative examples D, E, and F, in the product of the present invention, the amount of the coloring material droplets sprayed from the second nozzle member 50 with almost no coloring material adhering to the second nozzle member 50. It became clear that there was almost no variation in (volume).
[0115]
As described above, according to the results shown in Table 2, it has been clarified that the coloring material hardly adheres to the second nozzle member 50 by forming the second nozzle member 50 from ceramics. By forming the second nozzle member 50 from ceramics, it is difficult for the coloring material to adhere to the second nozzle member 50. For this reason, of course, it is possible to prevent the coloring material adhering to the second nozzle member 50 or the like from affecting the direction in which the dropped coloring material is sprayed. Accordingly, the coloring material can be reliably sprayed in a certain amount toward the desired position of the outer surface 3a of the electric wire 3, the desired position of the outer surface 3a of the electric wire 3 can be colored in a desired color, and coloring Thus, the above-described point 7 can be maintained in a desired area (size).
[0116]
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.
[0117]
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.
[0118]
【The invention's effect】
As described above, according to the first aspect of the present invention, the coloring material hardly adheres to the tapered surface, that is, the nozzle member. In this way, since the coloring material can be prevented from adhering to the nozzle member, the coloring material can be reliably sprayed from the nozzle member toward the outer surface of the electric wire by a certain amount.
[0119]
In addition, since the coloring material can be prevented from adhering to the nozzle member, of course, the coloring material adhering to the second nozzle member or the like is prevented from influencing the direction in which the colored material is sprayed. it can. Therefore, the coloring material can be reliably sprayed in a certain amount toward the desired position on the outer surface of the electric wire, the desired position on the outer surface of the electric wire can be colored in a desired color, and the colored portion can be desired. The area (size) can be maintained.
[0120]
It is provided a flat outer peripheral flat surface in a direction perpendicular to the direction in which the coloring material flows between the opening of the tape over tapered surface and the nozzle member. For this reason, a nozzle member can be processed easily and can be manufactured easily.
[0121]
Wear colorant is less likely to adhere to the outer circumferential flat surfaces or nozzle member. For this reason, the coloring material can be sprayed from the nozzle member reliably toward the outer surface of the electric wire by a certain amount. Therefore, the coloring material can be reliably sprayed in a certain amount toward the desired position on the outer surface of the electric wire, the desired position on the outer surface of the electric wire can be colored in a desired color, and the colored portion can be desired. The area (size) can be maintained.
[0122]
According to the second aspect of the present invention, the nozzle member is made of ceramics, and the coloring material is difficult to adhere to the nozzle member. For this reason, of course, it is possible to prevent the coloring material adhering to the nozzle member or the like from affecting the direction in which the dropped coloring material is sprayed. Therefore, the coloring material can be reliably sprayed in a certain amount toward the desired position on the outer surface of the electric wire, the desired position on the outer surface of the electric wire can be colored in a desired color, and the colored portion can be desired. The area (size) can be maintained.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of an electric wire coloring apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a coloring unit of the electric wire coloring apparatus along the line II-II in FIG. 1;
3 is an explanatory diagram showing a positional relationship between each coloring nozzle and an electric wire of the coloring unit shown in FIG. 2;
4 is a cross-sectional view showing a configuration of each coloring nozzle of the coloring unit shown in FIG. 2;
5 is a cross-sectional view showing a first nozzle member, a second nozzle member, and the like of the coloring nozzle shown in FIG. 4. FIG.
6A is a perspective view of an electric wire colored by the electric wire coloring apparatus shown in FIG. 1; FIG.
(B) is a top view of the electric wire shown by Fig.6 (a).
7 is an explanatory diagram for explaining a state in which a coloring material is sprayed from the coloring nozzle shown in FIG. 4;
[Explanation of symbols]
3 Electric wire 3a Outer surface 31 Colored nozzle 35 for electric wire Insert member (accommodating part)
50 Second nozzle member (nozzle member)
50b Tip portion 50c Opening portion 52 Tapered surface 53 Peripheral flat surface Q Direction in which the coloring material flows

Claims (3)

In a coloring nozzle for an electric wire that sprays a liquid coloring material by a certain amount toward the outer surface of an electric wire, and attaches the droplet of the coloring material to the outer surface of the electric wire to color the electric wire.
An accommodating portion for accommodating the coloring material;
A second nozzle member that is formed in a cylindrical shape and that is continuous with the first nozzle member that is in communication with the colorant on the inner side and that is in communication with the accommodating portion;
A tapered surface provided at the tip of the second nozzle member near the electric wire and gradually tapering the second nozzle member toward the electric wire;
A direction that is provided on the outer periphery of the opening of the second nozzle member facing the electric wire and on the inner periphery of the tapered surface, and is orthogonal to the direction in which the colorant flows in the second nozzle member An outer peripheral flat surface formed flat along
Equipped with a,
If the inner diameter of the second nozzle member is d and the radial width of the second nozzle member of the outer peripheral flat surface is W,
The coloring nozzle for electric wires characterized by satisfying d / 7 ≦ W ≦ d / 5 . The colored nozzle for electric wires according to claim 1, wherein the second nozzle member is made of ceramics. The first nozzle member is formed in a cylindrical shape and has an inner diameter larger than the inner diameter of the second nozzle member,
  The step which protruded toward the inner side from the inner surface of the said 1st nozzle member is provided between this 1st nozzle member and the said 2nd nozzle member, The Claim 1 or Claim 2 characterized by the above-mentioned. The coloring nozzle for electric wires as described in 2.

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