Patent Publication Number: US-7905010-B2

Title: Wire and wire harness order reception and production system

Description:
TECHNICAL FIELD 
     The present invention relates to an order-receiving production method and system for producing a wire (i.e. an electric wire) for use in a wiring harness and so on arranged in a motor vehicle and so on as a mobile unit, an order-receiving production method and system for assembling a wiring harness with wires, and a wire-crosslinking device. 
     BACKGROUND ART 
     Various electronic devices are mounted on a motor vehicle as a mobile unit. Therefore, the motor vehicle is provided with a wiring harness for transmitting power from a power source and control signals from a computer to the electronic devices. The wiring harness includes a plurality of electric wires and connectors attached to an end of the wires. 
     The wire includes an electrically conductive core wire and an electrically insulating coating, which coats the core wire. The wire is a so-called coated wire. A connector includes a terminal fitting and an insulating connector housing. The terminal fitting is made of conductive sheet metal or the like. The connector housing is formed in a box-shape and receives the terminal fitting. The connector is joined to a connector in electronic equipment, thereby the wiring harness supplies necessary electric power and signals to the electronic equipment. 
     The wire of the wiring harness must be distinguished in terms of the size of the core wire, the material of the coating (concerning with alteration in the materials depending upon heat-resisting property), and a purpose of use. The purpose of use means, for example, an air bag, antilock brake system (ABS), control signal such as speed data, and system in a motor vehicle in which the wire is used, such as a power transmission system. 
     In order to distinguish the purpose of use (system) as described above, the wire of the wiring harness has been colored to various colors. Upon manufacturing a conventional wire, when the outer circumference of the core wire is extrusion-coated with an insulating synthetic resin, the wire is colored to the desired color by mixing coloring agent having the desired color into the synthetic resin. 
     As for the wire described above, usually, the conductor is continuously coated with the synthetic resin and a long-sized wire is produced to increase the productivity, and the number of times for changing colors is reduced as much as possible. Accordingly, usually, a long-sized wire having the same color is produced. As for a packing of the wire, usually, the packing is carried out with a large lot and a long-sized product and for example, in a stockroom of a wire company, a wire having a color which meets the demand of a customer is usually sold by the piece. A wiring harness for use in an electric circuit, in which there are many combination of colors, is used in a motor vehicle, appliance, aircraft, and electric machine. 
     Accordingly, in a conventional wire factory, a great deal of wires is produced per product number and stocked. Then, according to the needs of products using wires such as a wiring harness, the stoked wires are shipped to a factory of a wiring harness or the like. Therefore, in a wire factory or a wiring harness-assembling factory, a wide space is needed to stock a great deal of wires, resulting in that the time-consuming control of wires of various product numbers is inevitably required. 
     Further, when the wires described above is produced, a pellet of the synthetic resin for constituting the coating of a wire and an additive, such as plasticizer, to be added to the synthetic resin are conveyed from a wire maker to a compounder who mixes the pellet and the additive. The compounder first dissolves, the pellet and the additive, then mixes them and then, cures it before shipping it to the wire maker. In a wire factory, the mixture of the pellet and the additive is dissolved again, then a core wire is extrusion-coated with it. Further, the coating of the wire is crosslinked according to needs, thus the wire is produced. 
     Accordingly, since it takes a lot of time to produce a wire, that is, to produce a wiring harness, it is not a good way to start producing the wire after receiving an order of a wire or wiring harness. This is a reason why the wire maker produces and stocks a large amount of the wires per their product number prior to receiving an order, while anticipating an order. 
     A motor vehicle maker receives many different demands from the users. Electronic equipment to be mounted on the motor vehicle is varied depending on the users, resulting in that sizes of wires for use in a wiring harness and the outer color of the wires become various and that an amount of wires of a given product number to be used tends to decrease. Thus, generally, the production of the wires is required to be the production of a small amount per each of various product types. 
     However, if the wire is produced by the conventional method as described above, since the number of types of the wires to be produced increases, therefore a space for stocking the produced wires increases and the control of the wires becomes further time-consuming work. Moreover, since the amount of the wire of a given product number to be used decreases, period of time for stocking the wire tends to become longer. Thus, according to the conventional process for producing a wire, that is, for producing a wiring harness, the production cost tends to increase, causing increasing in the cost of the wire itself, that is, the cost of the wiring harness itself. 
     Furthermore, when a wire is crosslinked in the conventional wire factory, various devices for the crosslinking has been used. The device for the crosslinking includes: an enclosed box through which the wire passes; and an irradiation unit to irradiate an electron beam onto the wires which pass through the interior of the box. The box is covered with a material such as copper to prevent the electron beam from leaking out outside. 
     A plurality of the irradiation units are arranged in the circumferential direction of the wire and irradiate the electron beam onto the coating of the wire for its whole circumference. Thus, the coating of the wire is crosslinked for its whole circumference. A conventional device for the crosslinking tends to become large since it includes a plurality of the irradiation units. 
     DISCLOSURE OF INVENTION 
     It is therefore a first objective of the present invention to solve the above problem and to provide an order-receiving production method and system for producing a wire and a wiring harness, by which the cost of the wire and a product using the wire can be prevented from increasing and the resource-saving can be attained. It is a second objective of the present invention to provide a small-sized wire-crosslinking device. 
     In order to attain the first objective, the present invention is an order-receiving production method of a wire comprising the steps of: 
     collecting a necessary amount of pellets of synthetic resin for constituting a coating of the wire, a core wire, and an additive to be added into the synthetic resin after receiving an order of the wire; and 
     extruding a mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, thereby producing the wire having a necessary length. 
     In order to attain the first objective, the present invention is characterized in that an outer surface of the wire produced is monochromatic. 
     In order to attain the first objective, the present invention is characterized in that the outer surface of the wire produced is colored with a desired color. 
     In order to attain the first objective, the present invention in claim  4  is characterized in that the wire produced is further crosslinked. 
     In order to attain the first objective, the present invention is an order-receiving production method of a wiring harness comprising the steps of: 
     collecting a necessary amount of pellets of synthetic resin for constituting a coating of the wire of the wiring harness, a core wire, and an additive to be added into the synthetic resin after receiving an order of the wiring harness; 
     extruding a mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, thereby producing the wire having a necessary length; and 
     attaching specific components to the wire produced, thereby assembling the wiring harness. 
     In order to attain the first objective, the present invention is characterized in that an outer surface of the wire produced is monochromatic. 
     In order to attain the first objective, the present invention is characterized in that the outer surface of the wire produced is colored with a desired color. 
     In order to attain the first objective, the present invention is characterized in that the wire produced is further crosslinked. 
     In order to attain the first objective, the present invention is an order-receiving production system of a wire comprising: 
     a wire-producing department for producing the wire, 
     a production control department for controlling the wire-producing department and receiving an order of the wire; 
     a first producing department for producing a pellet; 
     a second producing department for producing a core wire; and 
     a third producing department for producing an additive, wherein the production control department: computes a first ordered quantity data indicating an amount of the pellet of synthetic resin for constituting a coating of the wire corresponding to the amount of the received order forwarded from an order-placing department and forwards the first ordered quantity data to the first producing department; computes a second ordered quantity data indicating an amount of the core wire corresponding to the amount of the received order forwarded from the order-placing department and forwards the second ordered quantity data to the second producing department; and computes a third ordered quantity data indicating an amount of the additive to be added to the synthetic resin corresponding to the amount of the received order forwarded from the order-placing department and forwards the third ordered quantity data to the third producing department, 
     the first, second and third producing departments produce the pellet, core wire and additive to the amount corresponding to the first, second and third ordered quantity data, respectively, and send the produced pellet, core wire and additive, respectively, to the wire-producing department, and 
     the wire-producing department extrudes a mixture of the pellets sent from the first producing department and the additive sent from the third producing department onto the circumference of the core wire sent from the second producing department while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, thereby producing the wire having a necessary length. 
     In order to attain the first objective, the present invention is characterized in that an outer surface of the wire produced is monochromatic. 
     In order to attain the first objective, the present invention is characterized in that the system further comprises a coloring device for coloring the outer surface of the wire produced with a desired color. 
     In order to attain the first objective, the present invention is characterized in that the system further comprises a wire-crosslinking device for crosslinking the wire produced. 
     In order to attain the first objective, the present invention is characterized in that the wire-crosslinking device comprises: 
     an enclosed box including a pair of wire-guiding parts through which the wire passes; 
     an irradiation unit for irradiating an electron beam onto the wires which pass through the interior of the box; and 
     a pair of rollers arranged having a distance therebetween disposed rotatably in the box, 
     wherein the wire is guided into the box through one wire-guiding part, in the box the wire comes in contact with an outer circumferential surface of one roller located near to the one wire-guiding part and comes in contact with an outer circumferential surface of an opposite roller, and the wire again comes in contact with an outer circumferential surface of the one roller, thereby the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up and the wire is guided out from the box through an opposite wire-guiding part, and 
     the irradiation unit irradiates an electron beam onto the wires situated at the center between the pair of the rollers. 
     In order to attain the first objective, the present invention is an order-receiving production system of a wiring harness comprising: 
     a wire-producing department for producing a wire; 
     a wiring harness-assembling department for assembling a wiring harness by using the wire produced by the wire-producing department; 
     a production control department for controlling the wire-producing department and the wiring harness-assembling department, and receiving an order of the wiring harness; 
     a first producing department for producing a pellet; 
     a second producing department for producing a core wire; and 
     a third producing department for producing an additive, 
     wherein the production control department: computes a first ordered quantity data indicating an amount of the pellet of synthetic resin for constituting a coating of the wire corresponding to the amount of the received order forwarded from an order-placing department and forwards the first ordered quantity data to the first producing department; computes a second ordered quantity data indicating an amount of the core wire corresponding to the amount of the received order forwarded from the order-placing department and forwards the second ordered quantity data to the second producing department; and computes a third ordered quantity data indicating an amount of the additive to be added to the synthetic resin corresponding to the amount of the received order forwarded from the order-placing department and forwards the third ordered quantity data to the third producing department, 
     the first, second and third producing departments produce the pellet, core wire and additive to the amount corresponding to the first, second and third ordered quantity data, respectively, and send the produced pellet, core wire and additive, respectively, to the wire-producing department, and 
     the wire-producing department extrudes a mixture of the pellets sent from the first producing department and the additive sent from the third producing department onto the circumference of the core wire sent from the second producing department while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, thereby producing the wire having a necessary length, and sends the wire produced to the wiring harness-assembling department, and 
     the wiring harness-assembling department attaches a desired component to the wire produced by the wire-producing department, thereby assembling a wiring harness. 
     In order to attain the first objective, the present invention is characterized in that an outer surface of the wire produced is monochromatic. 
     In order to attain the first objective, the present invention is characterized in that at least one of the wire-producing department and the wiring harness-assembling department comprises a coloring device for coloring the outer surface of the wire produced with a desired color. 
     In order to attain the first objective, the present invention is characterized in that at least one of the wire-producing department and the wiring harness-assembling department comprises a wire-crosslinking device for crosslinking the wire produced. 
     In order to attain the first objective, the present invention is characterized in that the wire-crosslinking device comprises: 
     an enclosed box including a pair of wire-guiding parts through which the wire passes; 
     an irradiation unit for irradiating an electron: beam onto the wires which pass through the interior of the box; and 
     a pair of rollers arranged having a distance therebetween disposed rotatably in the box, 
     wherein the wire is guided into the box through one wire-guiding part, in the box the wire comes in contact with an outer circumferential surface of one roller located near to the one wire-guiding part and comes in contact with an outer circumferential surface of an opposite roller, and the wire again comes in contact with an outer circumferential surface of the one roller, thereby the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up and the wire is guided out from the box through an opposite wire-guiding part, and 
     the irradiation unit irradiates an electron beam onto the wires situated at the center between the pair of the rollers. 
     In order to attain the second objective, the present invention is a wire-crosslinking device comprising: 
     an enclosed box including a pair of wire-guiding parts through which the wire passes; 
     an irradiation unit for irradiating an electron beam onto the wires which pass through the interior of the box; and 
     a pair of rollers arranged having a distance therebetween disposed rotatably in the box, 
     wherein the wire is guided into the box through one wire-guiding part, in the box the wire comes in contact with an outer circumferential surface of one roller located near to the one wire-guiding part and comes in contact with an outer circumferential surface of an opposite roller, and the wire again comes in contact with an outer circumferential surface of the one roller, thereby the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up and the wire is guided out from the box through an opposite wire-guiding part, and 
     the irradiation unit irradiates an electron beam onto the wires situated at the center between the pair of the rollers. 
     According to the invention since the mixture of the pellets and the additive is extruded onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wire, the wire can be produced in a desired period of time. Further, since the wire is produced after receiving an order of the wire, an amount of the wire to be stocked in advance can be controlled. 
     According to the invention since an outer surface of the wire, which is produced after receiving an order of the wire, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. The color of the outer surface of the wire to be produced is preferably a bright color such as white. The outer surface of the wire to be produced may be non-colored. 
     In this specification, “non-colored” means a state in which a coloring agent is not mixed into synthetic resin that constitutes the coating of the wire, that is, means the color of the synthetic resin itself, while “to color the wire” means to color the outer surface of the coating of the wire with a coloring agent having a desired color. 
     The coloring agent means a liquid substance, in which a coloring material (organic substance for use in industry) is dissolved and dispersed in water or other solvent. The organic substance described above is a dye or a pigment (mainly, organic substance and synthetic product). Sometimes, a dye is used as a pigment and a pigment is used as a dye. In this specification, as a substantial example, the coloring agent is a coloring liquid or coating material. 
     The coloring liquid is a liquid, in which a dye is dissolved or dispersed in a solvent. The coating material is a material, in which a pigment is dispersed in a liquid dispersion. When the outer surface of the wire is colored with a coloring liquid, the dye permeates into the coating. When the outer surface of the wire is colored with a coating material, the pigment adheres to the outer surface without permeating into the coating of the wire. In the specification, “to color the outer surface of the wire” means to dye a part of the outer surface of the wire with a dye or to coat a part of the outer surface of the wire with a pigment. 
     Preferably, the solvent and liquid dispersion have an affinity to the synthetic resin for constituting the coating of the wire in order to securely permeate the dye into the coating of the wire or to make the pigment securely adhere to the outer surface of the coating of the wire. 
     According to the present invention, the outer surface of the wire produced is colored with a desired color to obtain the wire having the desired color. 
     According to the present invention, the wire produced is further crosslinked so as to obtain the wire, the coating of which has a specific strength. 
     According to the present invention, since the mixture of the pellets and the additive is extruded onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wiring harness, the wire can be produced in a desired period of time so as to assemble the wiring harness. Further, since the wire is produced after receiving an order of the wiring harness, an amount of the wire to be stocked in advance can be controlled. 
     The part described in this specification means a known connector, tube for a harness, protector for a harness, grommet for a harness, and clip for wiring, which are attached to the wire as mentioned above when the wiring harness is assembled. 
     According to the present invention, since an outer surface of the wire, which is produced after receiving an order of the wiring harness, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. The color of the outer surface of the wire to be produced is preferably a bright color such as white. The outer surface of the wire to be produced may be non-colored. 
     According to the present invention, the outer surface of the wire produced is colored with a desired color to obtain the wire having the desired color. Then, the part is attached to the colored wire so as to assemble the wiring harness. Since the wire colored with various colors can be obtained, one wire can be distinguished from another wire, thereby preventing an error in wiring the wires from occurring. 
     According to the present invention, the wire produced is further crosslinked so as to obtain the wire, the coating of which has a specific strength. Therefore, the wire in the wiring harness can have a predetermined strength. 
     According to the present invention, the production control department forwards a first ordered quantity data indicating a necessary amount of the pellets, second ordered quantity data indicating a necessary amount of the core wire and third ordered quantity data indicating a necessary amount of the additive, each corresponding to the received order of the wire, to a first producing department, second producing department and third producing department, respectively. Therefore, after receiving the order of the wire, a necessary amount of the starting materials of the wire can securely be collected. 
     Further, since wire-producing department extrudes the mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wire, the wire can be produced in a desired period of time. Further, since the wire is produced after receiving an order of the wire, an amount of the wire to be stocked in advance can be controlled. 
     According to the present invention, since an outer surface of the wire, which is produced after receiving an order of the wire, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. The color of the outer surface of the wire to be produced is preferably a bright color such as white. The outer surface of the wire to be produced may be non-colored. 
     According to the present invention, the system further comprises a coloring device for coloring the outer surface of the wire produced with a desired color. Therefore, the wire having the desired color can be obtained. 
     According to the present invention, the system further comprises a crosslinking device for crosslinking the wire so as to obtain the wire, the coating of which has a specific strength. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire, that is, an electron beam can securely irradiated onto one face-side of the wire and onto an opposite face-side of the wire situated at the back side of the one face-side of the wire. 
     When the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up, preferably, the wire is guided through the upper side of one roller, then guided through the lower side of the opposite roller and then, guided again from the upper side of the opposite roller to the lower side of the one roller, thereby the wire is guided from the upper side of the one roller to the opposite wire-guiding part. 
     According to the present invention, the production control department forwards a first ordered quantity data indicating a necessary amount of the pellets, second ordered quantity data indicating a necessary amount of the core wire and third ordered quantity data indicating a necessary amount of the additive, each corresponding to the received order of the wire, to a first producing department; second producing department and third producing department, respectively. Therefore, after receiving the order of the wire, a necessary amount of the starting materials of the wire can securely be gathered. 
     Further, since wire-producing department extrudes the mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. The wiring harness-assembling department attaches a desired component to the wire produced by the wire-producing department, thereby assembling a wiring harness. 
     Therefore, even if the wire is produced after receiving an order of the wiring harness, the wire can be produced in a desired period of time so as to assemble the wiring harness. Further, since the wire is produced after receiving an order of the wiring harness, an amount of the wire to be stocked in advance can be controlled. 
     According to the present invention, since an outer surface of the wire, which is produced after receiving an order of the wiring harness, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. The color of the outer surface of the wire to be produced is preferably a bright color such as white. The outer surface of the wire to be produced may be non-colored. 
     According to the present invention, at least one of the wire-producing department and the wiring harness-assembling department comprises a coloring device for coloring the outer surface of the wire produced with a desired color. Therefore, the wire having the desired color can be obtained. Then, the part is attached to the colored wire so as to assemble the wiring harness. Since the wire colored with various colors can be obtained, one wire can be distinguished from another wire, thereby preventing an error in wiring the wires from occurring. 
     According to the present invention, the system further comprises a crosslinking device for crosslinking the wire so as to obtain the wire, the coating of which has a specific strength. Therefore, the wire in the wiring harness can have a predetermined strength. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. 
     When the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up, preferably, the wire is guided through the upper side of one roller, then guided through the lower side of the opposite roller and then, guided from the upper side of the opposite roller to the lower side of the one roller, thereby the wire is guided from the upper side of the one roller to the opposite wire-guiding part. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. 
     When the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up, preferably, the wire is guided through the upper side of one roller, then guided through the lower side of the opposite roller and then, guided again from the upper side of the opposite roller to the lower side of the one roller, thereby the wire is guided from the upper side of the one roller to the opposite wire-guiding part. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a basic construction of an order-receiving production system of a wiring harness according to a preferred embodiment of the present invention; 
         FIG. 2  shows a basic construction of a production control section in the order-receiving production system of a wiring harness shown in  FIG. 1 ; 
         FIG. 3  is a flow chart illustrating a step flow for producing a wiring harness in the order-receiving production system of a wiring harness shown in  FIG. 1 ; 
         FIG. 4  is a perspective view illustrating an example of a wire produced in a wire-producing section in the order-receiving production system of a wiring harness shown in  FIG. 1 ; 
         FIG. 5  is a perspective view illustrating an example of an wiring harness assembled in a wiring harness-assembling section in the order-receiving production system of a wiring harness shown in  FIG. 1 ; 
         FIG. 6  shows a construction of a wire-producing section in the order-receiving production system of a wiring harness shown in  FIG. 1 ; 
         FIG. 7  shows a construction of a coloring device in the wire-producing department shown in  FIG. 6 ; 
         FIG. 8  is a longitudinal cross section illustrating a construction of a wire-crosslinking device in the wire-producing department shown in  FIG. 6 ; 
         FIG. 9  is a cross sectional view taken along IX-IX line in  FIG. 8 ; and 
         FIG. 10  shows a construction of a modified example of the wire-producing department shown in  FIG. 6 . 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     In the following, a preferred embodiment of the present invention will be explained with reference to  FIGS. 1-9 . An order-receiving production system  1  (shown in  FIG. 1 ) of a wiring harness according to the preferred embodiment of the present invention produces an electric wire  2  shown in  FIG. 4  and assembles a wiring harness  3  shown in  FIG. 5 . 
     The wires  2  constitute the wiring harness  3 . As shown in  FIG. 4 , the wire  2  includes an electrically conductive core wire  4  and an insulating coating  5 . The core wire  4  consists of a plurality of element wires twisted together. The element wire is made of conductive metal. The core wire  4  may consist of a single element wire. 
     The coating  5  is made of synthetic resin such as polyvinyl chloride (PVC). The core wire  4  is coated with the coating  5 . Therefore, an outer surface  5   a  of the coating  5  is an outer surface of the wire  2 . The outer surface  5   a  of the coating  5  is monochromatic with color P (hereinafter, monochrome P). A desired coloring agent such as a white coloring agent may be added to the synthetic resin of the coating  5  so as to make the outer surface  5   a  of the wire  2  monochromatic with color P or, alternatively, a coloring agent may not be added to the synthetic resin of the coating  5  so as to make the monochrome P be a color of the synthetic resin itself. 
     When the monochrome P is the color of the synthetic resin itself, the outer surface  5   a  of the wire  2  is called non-coloring in this specification. Therefore, in the present invention, the outer surface  5   a  of the wire  2  may be set non-coloring. 
     The outer surface  5   a  of the wire  2  is provided with a mark  7  consisting of a plurality of spots  6 . The spot  6  has a color B (shown by parallel diagonal lines in  FIG. 4 ). The color B is different from the monochrome P. The shape of the spot  6  is round. A plurality of spots  6  are provided and arranged in the longitudinal direction of the wire  2  according to a predetermined pattern. The distance between the centers of the adjacent spots  6  is predetermined. The diameter of the spot  6  is also predetermined. The distance, diameter and color B described above constitute a marking pattern on the outer surface  5   a  of the wire  2 . 
     The wire  2  of one product number is different from the wire  2  of another product number in terms of an outer diameter (hereinafter, wire diameter) of the core wire  4  and material of the coating. Further, The wire  2  of one product number is different from the wire  2  of another product number in terms of a pattern of the spots  6  to be formed on the outer surface  5   a  of the coating  5 , that is a marking pattern of the outer surface  5   a  of the wire  2 . Thus, the product number of the wire  2  indicates the diameter of the core wire  4 , i.e. of the wire  2 , the material of the coating  5 , and the marking pattern. Therefore, if the product numbers of two wires  2  are different from each other, at least one of the outer diameter, wire diameter and marking pattern is different from each other. 
     The color B of the marking pattern, i.e. of each spot  6  of the mark  7  is changed to various colors, thereby enabling to distinguish between the wires  2 . The color B of each spot  6  of the mark  7  is used to distinguish the types of the wire  2  of the wiring harness  3  and the systems to be used. That is, the color B of the outer surface  5   a  of the wire  2  obtained by the coloring is used to distinguish the purpose for use of the wire  2  of the wiring harness  3 . 
     A copper wire thicker than an element wire is formed thin by using a known die, thereby obtaining the element wire described above. The element wires are twisted with each other, thereby obtaining the core wire  4 , and synthetic resin or the like is extrusion-coated around the core wire  4 , thereby obtaining the wire  2 . At this time, granular pellets consisting of synthetic resin and the powdered or liquid additive such as a known plasticizer are mixed under heating. Then, the pellet melts, and the synthetic resin and the additive are well mixed with each other, and then it is extrusion-coated around the core wire  4 . Then, the coating  5  is cooled down, thereby the wire is produced. 
     In the wiring harness  3  as shown in  FIG. 5 , a plurality of thus constituted wire  2  are bundled up, and a connector  8 , tube  9  for a harness, protector  10  for a harness, grommet  11  for a harness, clip  12  for wiring and so on are mounted to specific portions of the wire  2 , and a tape  13  for a harness is wound up around specific portions of the wire  2 , thereby constructing the wiring harness  3 . The connector  8  is connected with a connector of various electronic equipment in a motor vehicle, thereby the wiring harness  3  is arranged in various devices such as a motor vehicle. 
     The wiring harness  3  (i.e. wires  2 ) transmits various signals and electric power to various electronic equipment to be mounted on a motor vehicle and so on. The connector  8 , tube  9  for a harness, protector  10  for a harness, grommet  11  for a harness, clip  12  for wiring are components described in this specification. The wiring harness  3  is a product using the wire  2 . 
     As shown in  FIG. 1 , the order-receiving production system  1  of a wiring harness includes a wire-producing department  14 , wiring harness-assembling department  15  and production control department  16 . The wire-producing department  14  produces the wire  2 . For example, wire-producing line in a wire-manufacturing plant is used as the wire-producing department  14 . As shown in  FIG. 6 , the wire-producing department  14  includes a core wire-supplying unit  17 , annealing unit  18 , extrusion-coating unit  19 , coloring device  20 , crosslinking unit  21 , and wire-cutting/terminal-crimp-contacting unit  22 . 
     When the wire-producing department  14  produces the wire  2 , the core wire  4  or the wire  2  is transferred through the core wire-supplying unit  17 , annealing unit  18 , extrusion-coating unit  19 , coloring device  20 , crosslinking unit  21 , and wire-cutting/terminal-crimp-contacting unit  22  in this sequence. The wire-producing department  14  includes a belt pulley (not shown in the figure) to transfer the core wire  4  or the wire  2 . 
     The core wire-supplying unit  17  supplies the wire  4  which is in a state that a plurality of the element wires are twisted together and the coating  5  is not applied yet. The annealing unit  18  heats up the core wire  4  and thereafter slowly cools it down to room temperature so as to remove the strain or the like generated in the core wire  4 . Thus the annealing unit  18  anneals the core wire  4 . 
     The extrusion-coating unit  19  includes a preblender  23 , kneader  24 , conveyer  25 , and extrusion head  26 . The preblender  23  is formed in a shape of a box having an upper opening and receives the pellets and additive described above. The preblender  23  has a vane wheel (not shown). The vane wheel rotates so as to crush and mix the pellets with the additive and conveys them to the kneader  24 . 
     The kneader  24  includes a cylindrical body  24   a , heating unit (not shown), and a vane wheel  24   b . The body  24   a  transfers the pellets and additive supplied from the preblender  23  thereinto. The heating unit heats up and melts specifically the pellets in the body  24   a . The vane wheel  24   b  rotates so as to mix the molten pellets and the additive in the body  24   a  and transfers them to the conveyer  25 . The kneader  24  heats up the pellets so as to melt them and thereafter mixes the molten pellet with the additive uniformly and thereafter transfers them to the conveyer  25 . 
     The conveyer  25  includes a cylindrical body  25   a , heating unit (not shown), and a vane wheel  25   b . The body  25   a  transfers the pellets and additive supplied from the kneader  24  thereinto. The heating unit specifically heats up the pellets to keep them in a molten state in the body  25   a . The vane wheel  25   b  rotates so as to transfer the molten pellets and the additive in the body  25   a  to the extrusion head  26 . The conveyer  25  transfers the mixed molten pellets and the additive to the extrusion head  26 . 
     The extrusion head  26  has a core wire-guiding part for guiding the core wire therethrough. The core wire  4  moves through the core wire-guiding part so that the extrusion head  26  extrusion-coats the core wire  4  with the mixed molten pellet and additive. Thus, the extrusion-coating unit  19  extrudes the mixture of the pellets and the additive onto the circumference of the core wire  4  while simultaneously mixing the pellets and the additive so that the core wire  4  is coated with the mixture, thereby forming the coating  5 . 
     A coloring device  20  marks a desired pattern on the outer surface  5   a  of the coating  5  of the wire  2 , the coating  5  of which is extrusion-coated by the extrusion-coating unit  19 . As shown in  FIG. 7 , the coloring device  20  includes a wire-forwarding unit  27 , a plurality of coloring units  28 , an encoder  29  as detection means, and controller  30 . 
     The wire-forwarding unit  27  has a pair of belt-forwarding units  31 . The belt-forwarding units  31  includes a drive pulley  32  rotated by a motor or the like, a plurality of idler pulleys  33 , and an endless belt  34  tied up to the pulleys  32  and  33 . The endless belt  34  rotates around the pulleys  32  and  33 . 
     The pair of belt-forwarding units  31  holds the wire  2  therebetween and rotates the drive pulley  32  synchronously so as to rotate the endless belt  34 , thereby forwarding the wire  2  by a specific length. At this time, the pair of belt-forwarding units  31  transfers the wire  2  along an arrow K shown in  FIGS. 6 and 7 , which is parallel to the longitudinal direction of the wire  2 . 
     In the figure, a pair of the coloring units  28  is provided. The pair of the coloring units  28  is arranged along the arrow K. Each coloring unit  28  has a nozzle  35  and valve  36 . The nozzle  35  faces the wire  2 , which is transferred along the arrow K by the pair of belt-forwarding units  31 ′. The coloring agent of the color B is supplied from a coloring agent supply source  37  (shown in  FIG. 7 ) into the nozzle  35  of the coloring unit  28 . 
     The valve  36  is connected to the nozzle  35 . The valve  36  is also connected to a pressurized gas supply source  38  (shown in  FIG. 7 ), which supplies pressurized gas to the nozzle  35  through the valve  36 . When the valve  36  is opened, by the pressurized gas supplied from the pressurized gas supply source  38 , the coloring agent in the nozzle  35  spouts out toward the outer surface  5   a  of the wire  2 . 
     When the valve  36  is closed, the coloring agent stops spouting. According the construction described above, the coloring unit  28  opens the valve  36  for a predetermined period of time by a signal from the controller  30  so that the specific amount of the coloring agent is spouted toward the outer surface  5   a  of the wire  2 . 
     The coloring agent means a liquid substance, in which a coloring material (organic substance for use in industry) is dissolved and dispersed in water or other solvent. The organic substance described above is a dye or a pigment (mainly, organic substance and synthetic product). Sometimes, a dye is used as a pigment and a pigment is used as a dye. As a substantial example, the coloring agent is a coloring liquid or coating material. 
     The coloring liquid is a liquid, in which a dye is dissolved or dispersed in a solvent. The coating material is a material, in which a pigment is dispersed in a liquid dispersion. When the coloring liquid adheres to the outer surface  5   a  of the wire  2 , the dye permeates into the coating  5 . When a coating material adheres to the outer surface  5   a  of the wire  2 , the pigment adheres to the outer surface  5   a  without permeating into the coating  5  of the wire  2 . 
     That is, the coloring unit  28  dyes a part of the outer surface  5   a  of the wire  2  with a dye or coats a part of the outer surface  5   a  of the wire  2  with a pigment. Accordingly, marking the outer surface  5   a  of the wire  2  means that a part of the outer surface  5   a  of the wire  2  is dyed with a dye and a part of the outer surface  5   a  of the wire  2  is coated with a pigment. 
     Preferably, the solvent and liquid dispersion have an affinity to the synthetic resin for constituting the coating  5  of the wire  2  in order to securely permeate the dye into the coating  5  of the wire  2  or to make the pigment securely adhere to the outer surface  5   a  of the coating  5  of the wire  2 . 
     Coloring the outer surface  5   a  of the wire  2  in this specification means either coloring the whole outer surface  5   a  or coloring a part of the outer surface  5   a . Accordingly, coloring the outer surface  5   a  of the wire  2  in this specification includes the marking on the outer surface  5   a  of the wire  2 . 
     The encoder  29  measures an amount of the movement of the wire  2  and information based on a speed of the movement and outputs them to the controller  30 . The controller  30  is a computer including known RAM, ROM, CPU and so on, and is connected to the encoder  29  and valve  36  in order to control the whole coloring device  20 . 
     The controller  30  memorizes the distance between the spots  6  formed on the outer surface  5   a  of the wire  2 , the diameter and the number of the spots  6 . The controller  30  memorizes many kinds of the mark  7  described above. That is, the controller  30  memorizes a plurality of patterns of the mark  7 . The controller  30  memorizes the distance between the nozzles  35  of the coloring unit  28 . 
     The controller  30  receives a first production data DT 1  explained later on. On the basis of the inputted first production data DT 1 , the information of the speed of the wire  2  from the encoder  29  and the distance between the nozzles  35 , the controller  30  controls each valve  36  and the pressurized gas supply source  38  so that the spots  6 , that is, the marks  7  are formed on the outer surface  5   a  of the wire  2  with a pattern which meets the first production data DT 1 . 
     When the coloring device  20  forms the spots  6  on the outer surface  5   a  of the wire  2 , that is, marks the outer surface  5   a  of the wire  2 , the pair of belt-forwarding units  31  transfers the wire  2  along the arrow K. Then, the controller  30  controls the valve  36  and so on so as to spout the specific amount of the coloring agent from the nozzle  35  of each coloring unit  28  toward the outer surface  5   a  of the wire  2 . The controller  30  forms the marks  7  on the outer surface  5   a  of the wire  2  with a pattern which meets the first production data DT 1 . 
     Thus, the coloring device  20  coats the outer surface  5   a  of the coating  5  of the wire  2  with coating medium or dyes the outer surface  5   a  of the coating  5  of the wire  2  with coloring liquid so as to mark the outer surface  5   a  of the wire  2  with a specific pattern (that is, so as to form the mark  7  of the color B in a desired shape). The coloring device  20  colors the outer surface  5   a  of the wire  2  so as to form the marking pattern described above. 
     The crosslinking unit  21  crosslinks the wires  2  which are colored in a specific pattern by the coloring device  20 . As shown in  FIG. 8 , the crosslinking unit  21  includes an enclosed box  39  the interior of which is sealed, a pair of rollers  40  and an electron gun  41  as irradiation means. The box  39  has a pair of guide holes  42  for guiding the wire  2  therethrough. The guide hole  42  corresponds to the wire-guiding part described in the claims. 
     The guide hole  42  penetrates through a wall  39   a  which constitutes the box  39 . One guide hole  42  faces the opposite guide hole  42  having a distance therebetween. One guide hole  42   a  situated at left in  FIG. 8  guides the wire  2  from the outside of the crosslinking unit  21 , that is, the outside of the box  39  into the crosslinking unit  21 , that is, into the box  39 . The opposite guide hole  42   b  situated at right in  FIG. 8  guides the wire  2  from the inside of the crosslinking unit  21 , that is, the inside of the box  39  to the outside of the crosslinking unit  21 , that is, to the outside of the box  39 . Thus, the guide holes  42   a  and  42   b  guide the wire  2  so that the wire  2  moves along the arrow K. An outer surface of the box  39  is covered with lead or the like so that the electron beam does not leak out to the outside. 
     A pair of rollers  40  is provided rotatably in the box  39 . The pair of the rollers  40  is arranged having a distance therebetween along the direction (the arrow K), in which the guide hole  42   a  faces the guide hole  42   b . The center of the rotation of the roller  40   a  is parallel to that of the roller  40   b  and crosses the arrow K at right angles. The pair of the rollers  40  ties up the wire  2  with the wire&#39;s sleeves tucked up and guides the wire  2  from one guide hole  42   a  toward an opposite guide hole  42   b.    
     In the figure, the wire  2  is guided through the upper of one roller  40   a  situated near to one guide hole  42   a  and made come in contact with the outer circumferential surface of the one roller  40   a  and thereafter, is guided through the lower of an opposite roller  40   b  situated near to an opposite guide hole  42   b  and made come in contact with the outer circumferential surface of the opposite roller  40   b . Thereafter, the wire  2  is guided through the upper of the opposite roller  40   b  and thereafter, guided again the lower of the one roller  40   a  and made come in contact with the outer circumferential surface of the one roller  40   a . Thereafter, the wire  2  is guided from the upper of the one roller  40   a  and guided through the opposite guide hole  42   b  so as to guide the wire  2  toward the outside of the box  39 . Thus, the pair of the rollers  40   a  and  40   b  ties up the wire  2  with the wire&#39;s sleeves tucked up. Therefore, as shown in  FIG. 8 , the wire  2  is tied up in a shape of a letter of “8” in a lateral view. 
     The electric gun  41  irradiates an electron beam toward the center shown with a dotted line in  FIG. 9  between the pair of the rollers  40   a  and  40   b . The electron gun  41  irradiates an electron beam onto a portion  2   a  where the wire  2  crosses each other between the pair of the rollers  40   a  and  40   b . That is, the electron gun  41  irradiates an electron beam onto both one surface side  2   b  shown in  FIG. 8  of the wire  2  and an opposite surface side  2   c  of the wire  2 , wherein the opposite surface side  2   c  is situated at the back of the one surface side  2   b.    
     The crosslinking unit  21  guides the wire  2 , which is marked in a desired pattern by the coloring device  20 , through the one guide hole  42   a  and guides the wire  2  into the box  39 . The crosslinking unit  21  ties up the wire  2  to the pair of the rollers  40   a ,  40   b  with the wire&#39;s sleeves tucked up and guides the wire  2  through the opposite guide hole  42   b  so as to guide the wire  2  toward the outside of the box  39 . At this time, the crosslinking unit  21  makes the electron gun  41  irradiate an electron beam onto the portion  2   a  where the wire  2  crosses each other between the pair of the rollers  40   a  and  40   b , thereby crosslinking the coating  5  of the wire  2  so as to improve the mechanical strength of the coating  5 . The crosslinking unit  21  corresponds to the wire-crosslinking device described in the claims. 
     The wire-cutting/terminal-crimp-contacting unit  22  cuts the wire  2 , which is crosslinked by the crosslinking unit  21 , into a specific length and attaches a terminal fitting, which is received in a connector housing of the connector  8  described above, to an end of the cut wire  2 . 
     The first production data DT 1  explained later on is forwarded from a personal computer  16   a  explained later on of the production control department  16  to the wire-producing department  14 . The pellets which meets the first production data DT 1 , the core wire  4  which meets a second production data DT 2  explained later on and the additive which meets the third production data DT 3  explained later on are transferred from a resin-producing department  44 , core wire-producing department  45 , and additive-producing department, respectively, to the wire-producing department  14 . 
     Then, the wire-producing department  14  supplies the core wire  4  from the core wire-supplying unit  17  and puts the pellets and additive into the preblender  23  of the extrusion-coating unit  19 . Then, the extrusion-coating unit  19  extrudes the mixture of the pellets and the additive onto the circumference of the core wire  4  while simultaneously mixing the pellets and the additive so that the core wire  4  is coated with the mixture, thereby producing the wire  2 , the outer surface  5   a  of which is the monochrome P. 
     In the wire-producing department  14 , the coloring device  20  marks the produced wire  2  with a specific pattern and the crosslinking unit  21  carries out the crosslinking, thereby obtaining the wire  2  shown in  FIG. 4 . The wire-producing department  14  conveys the produced wire  2  to the wiring harness-assembling department  15 . When the wire-producing department  14  receives the first production data DT 1 , on the basis of the data DK 1 , DK 2 , DK 3  and so on, the department  14  computes a fourth confirmation data DK 4  (shown in  FIG. 2 ) indicating a date when the production of the wire  2  is finished for meeting the first production data DT 1  and so on. The wire-producing department  14  forwards the fourth confirmation data DK 4  to both the personal computer  16   a  of the production control department  16  and the wiring harness-assembling department  15 . 
     As the wiring harness-assembling department  15 , for example, a wiring harness-assembling line in a wiring harness plant is used. The wiring harness-assembling department  15  assembles a wiring harness  3  by using the wire  2  produced in the wire-producing department  14  and various components  8 ,  9 ,  10 ,  11  and  12  mentioned above. After the assembled wiring harness  3  is subjected to a continuity test, visual examination and so on, the wiring harness-assembling department  15  conveys the wiring harness  3  to a wiring harness order-placing department  43  shown in  FIG. 1 . 
     The second production data DT 2  is also forwarded from the production control department  16  to the wiring harness-assembling department  15 . The fourth confirmation data DK 4  is also forwarded from the wire-producing department  14  to the wiring harness-assembling department  15 . On the basis of the data DT 2  and DK 4 , the wiring harness-assembling department  15  computes a fifth confirmation data DK 5  (shown in  FIG. 2 ) indicating a date when the production of the wiring harness  3  is finished for meeting the second production data DT 2  and so on. The wiring harness-assembling department  15  forwards the fifth confirmation data DK 5  to the personal computer  16   a  of the production control department  16 . 
     Used as the production control department  16  is a supervision department for supervising a business section of the wiring harness  3  or a supervision department for supervising a production line of a product such as a wiring harness  3  to be produced from the wire  2 . As shown in  FIG. 1 , the production control department  16  has a portable computer  16   a  (hereinafter, personal computer) which includes a known RAM, ROM and CPU. 
     As shown in  FIG. 1 , the personal computer  16   a  of the production control department  16  is connected to a portable computer  43   a  (hereinafter, personal computer) of the wiring harness order-placing department  43 , a portable computer  44   a  (hereinafter, personal computer) of the resin-producing department  44  as a first producing department, a portable computer  45   a  (hereinafter, personal computer) of the core wire-producing department  45  as a second producing department, a portable computer  46   a  (hereinafter, personal computer) of the additive-producing department  46  as a third producing department, the wire-producing department  14 , and the wiring harness-assembling department  15  through a network or the like. The personal computer  16   a  of the production control department  16  controls these described above. The wiring harness order-placing department  43  belongs to the order-placing department. The production control department  16  controls the whole order-receiving production system  1  of a wiring harness. 
     For example, a resin-producing plant (resin maker) for producing synthetic resin for constituting the coating  5  is used as the resin-producing department  44 . The resin-producing department  44  has a personal computer  44   a  including a known RAM, ROM and CPU. Upon receiving a first ordered quantity data D 1  explained later on, the resin-producing department  44  produces the amount of the pellets, which meets the first ordered quantity data D 1 . The pellet consists of the synthetic resin for constituting the coating  5  of the wire  2  and is granular. The resin-producing department  44  transfers the produced pellets to the wire-producing department  14 . 
     When the personal computer  44   a  of the resin-producing department  44  receives the first ordered quantity data D 1 , the resin-producing department  44  produces the amount of the pellets which meets the first ordered quantity data D 1  and computes the first confirmation data DK 1  (shown in  FIG. 2 ) indicating a date when the produced pellets can be transferred to the wire-producing department  14  and so on. The personal computer  44   a  of the resin-producing department  44  forwards the first confirmation data DK 1  to both the personal computer  16   a  of the production control department  16  and the wire-producing department  14 . 
     As the core wire-producing department  45 , a core wire-production line in a wire-producing plant is used. The core wire-producing department  45  has a personal computer  45   a  including a known RAM, ROM and CPU. Upon receiving a second ordered quantity data D 2  from the production control department  16 , the core wire-producing department  45  produces the core wire  4  of the wire  2 . Upon receiving a second ordered quantity data D 2  from the production control department  16 , the personal computer  45   a  computes copper wire amount data DD (shown in  FIG. 2 ) indicating the amount of the copper wire, which meets the second ordered quantity data D 2 . The personal computer  45   a  forwards the copper wire amount data DD to a portable computer  47   a  (hereinafter, personal computer) of the copper wire-producing department  47 . 
     As the copper wire-producing department  47 , a copper wire-producing line in a wire-producing plant or a copper wire-producing line in a metal-producing plant (metal maker) is used. The copper wire-producing department  47  has a personal computer  47   a  including a known RAM, ROM and CPU. When the personal computer  47   a  receives the copper wire amount data DD, the copper wire-producing department  47  produces the amount of the copper wire, which meets the copper wire amount data DD, and transfers the produced copper wire to the copper wire-producing department  45 . The copper wire is made of electrically conductive metal similar to the element wire for constituting the core wire  4 , such as copper, and is thicker than the element wire. When the personal computer  47   a  receives the copper wire amount data DD, the copper wire-producing department  47  produces the amount of the copper wire, which meets the copper wire amount data DD, and forwards copper wire amount confirmation data DDK (shown in  FIG. 2 ) indicating a date when the produced copper wire can be transferred to the core wire-producing department  45  and so on to the personal computer  45   a  of the core wire-producing department  45 . 
     The core wire-producing department  45  forms the copper wire forwarded from the copper wire-producing department  47  thin by guiding it through a die, thereby producing an element wire. The core wire-producing department  45  twists the element wires so as to produce the core wire  4  and transfers the produced core wire  4  to the wire-producing department  14 . When the personal computer  45   a  receives the second ordered quantity data D 2 , on the basis of the copper wire amount confirmation data DDK and so on, the core wire-producing department  45  produces the amount of the core wire  4 , which meets the second ordered quantity data D 2 , and computes the second confirmation data DK 2  (shown in  FIG. 2 ) indicating a date when the produced core wire  4  can be transferred to the wire-producing department  14 . The personal computer  45   a  forwards the second confirmation data DK 2  to both the personal computer  16   a  of the production control department  16  and the wire-producing department  14 . 
     As the additive-producing department  46 , an additive-producing plant (additive maker) for producing an additive for adding into the synthetic resin for constituting the coating  5  of the wire  2  is used. As the additive, a plasticizer or various coloring agents can be used. The additive is a liquid or powder. The additive-producing department  46  has a personal computer  46   a  including a known RAM, ROM and CPU. 
     When the personal computer  46   a  receives a third ordered quantity data D 3 , the additive-producing department  46  produces the amount of the additive, which meets the third ordered quantity data D 3 , and transfers the produced additive to the wire-producing department  14 . When the personal computer  46   a  receives a third ordered quantity data D 3 , additive-producing department  46  produces the additive and the personal computer  46   a  computes third confirmation data DK 3  (shown in  FIG. 2 ) indicating a date when the produced additive can be transferred to the wire-producing department  14  and forwards the third confirmation data DK 3  to both the personal computer  16   a  of the production control department  16  and the wire-producing department  14 . 
     Ordered data D indicating the ordered quantity of the wiring harness  3 , i.e. the ordered quantity of the wire  2  is inputted from the personal computer  43   a  of the wiring harness order-placing department  43  to the personal computer  16   a  of the production control department  16 . The ordered data D indicates the product number and the number of the wiring harness  3 , the product number and the length of the wire  2  of the wiring harness  3  having each product number, and the product number and the number of the components  8 ,  9 ,  10 ,  11 , and  12  of the wiring harness having each product number. That is, the ordered data D indicates the ordered quantity of the wiring harness  3 , that is, the ordered quantity of the wire  2 . Thus, the production control department  16  receives the order of the wire  2 . 
     When the personal computer  16   a  of the production control department  16  receives the order of the wiring harness  3 , that is, the order of the wire  2  from a wiring harness order-placing department  43 , the personal computer  16   a  makes each department  44 ,  45  and  46  produce the necessary amount of the pellet, core wire  4  and additive, respectively, and makes each department transfer the respective products to the wire-producing department  14 . Thereafter, the personal computer  16   a  makes the wire-producing department  14  produce the wire  2  by using the above products (the pellet, core wire  4  and additive) and transfer the produced wire  2  to the wiring harness-assembling department  15 . Thereafter, the personal computer  16   a  makes the wiring harness-assembling department  15  assemble the wiring harness  3  and transfer (ship) the assembled wiring harness  3  to the wiring harness order-placing department  43 . 
     At this time, the first, second and third confirmation data DK 1 , DK 2  and DK 3  are forwarded from the respective personal computers  44   a ,  45   a  and  46   a  of the respective departments  44 ,  45  and  46  to the personal computer  16   a  of the production control department  16 . Further, the fourth and fifth confirmation data DK 4  and DK 5  are forwarded from the wire-producing department  14  and the wiring harness-assembling department  15 , respectively, to the personal computer  16   a  of the production control department  16 . The personal computer  16   a  forwards the fifth confirmation data DK 5  to the personal computer  43   a  of the wiring harness order-placing department  43 . 
     The personal computer  16   a  is a control system including a sequence for supplying an information necessary to produce and assemble the wire  2  and wiring harness  3  (data D 1 , D 2 , D 3 , DT 1  and DT 2 ) to the respective departments, the wire-producing department  14  and wiring harness-assembling department  15 . A sequence carried out by the personal computer  16   a  explained later on may be carried out artificially or by using a device into which a machine and electrical information is installed. 
     As shown in  FIG. 2 , the personal computer  16   a  includes data-combining module  48 , first production data-forming module  49 , and second production data-forming module  50 . The data-combining module  48  is connected to the personal computer  43   a  of the wiring harness order-placing department  43 , personal computer  44   a  of the resin-producing department  44 , personal computer  45   a  of the core wire-producing department  45 , and personal computer  46   a  of the additive-producing department  46  through an input/output module  51 . The ordered data D is inputted into the data-combining module  48 . 
     The data-combining module  48  decodes the ordered data D on the basis of a program stored in a database  52 . The data-combining module  48  computes the first ordered quantity data D 1  (shown in  FIG. 1 ) indicating the product number of the pellet and the amount per the product number, which are necessary for the wire  2  in the ordered data D. The data-combining module  48  forwards the first ordered quantity data D 1  to the personal computer  44   a  of the resin-producing department  44  through the input/output module  51 . 
     The data-combining module  48  computes the second ordered quantity data D 2  (shown in  FIG. 1 ) indicating the product number of the core wire  4  and the amount per the product number, which are necessary for the wire  2  in the ordered data D. The data-combining module  48  forwards the second ordered quantity data D 2  to the personal computer  45   a  of the core wire-producing department  45  through the input/output module  51 . 
     The data-combining module  48  computes the third ordered quantity data D 3  (shown in  FIG. 1 ) indicating the product number of the additive and the amount per the product number, which are necessary for the wire  2  in the ordered data D. The data-combining module  48  forwards the third ordered quantity data D 3  to the personal computer  46   a  of the additive-producing department  46  through the input/output module  51 . Further, the data-combining module  48  forwards the ordered data D to both the first production data-forming module  49  and second production data-forming module  50 . 
     The data-combining module  48  is connected to the wire-producing department  14  and the wiring harness-producing department  15  through an input module  53 . The data-combining module  48  receives the fourth confirmation data DK 4  from the wire-producing department  14  and the fifth confirmation data DK 5  from the wiring harness-assembling department  15 . The data-combining module  48  forwards the fifth confirmation data DK 5  to the personal computer  43   a  of the wiring harness order-placing department  43  through the input/output module  51 . 
     The first production data-forming module  49  decodes the ordered data D on the basis of a program stored in the database  52  and computes the first production data DT 1  indicating the length per the product number of the wire  2  necessary for the ordered data D. The first production data-forming module  49  forwards the first production data DT 1  to the wire-producing department  14  through an output module  54 . 
     The second production data-forming module  50  decodes the ordered data D on the basis of a program stored in the database  52  and computes the second production data DT 2  indicating the number of the wiring harness per the product number necessary for the ordered data D. The second production data-forming module  50  forwards the second production data DT 2  to the wiring harness-assembling department  15  through the output module  54 . 
     The production control department  16  and the wire-producing department  14  constitute the order-receiving production system  1   a  of the wire. 
     When the wiring harness  3 , i.e. the wire  2  is produced by using the order-receiving production system  1  of the wiring harness, first, in step S 1  shown in  FIG. 3 , it is judged whether or not the order of the wiring harness  3 , i.e. wire  2  is received. If not received, step S 1  is repeated, and if received, the process advances to step S 2 . 
     In step S 2 , the personal computer  16   a  of the production control department  16  forwards the first production data DT 1  to the wire-producing department  14  and forwards the second production data DT 2  to the wiring harness-assembling department  15 . Further, the personal computer  16   a  forwards the respective ordered quantity data D 1 , D 2  and D 3  to the respective departments  44 ,  45  and  46 . Then, the respective departments  44 ,  45  and  46  forward the respective confirmation data DK 1 , DK 2  and DK 3  to both the personal computer  16   a  of the production control department  16  and the wire-producing department  14 . 
     Further, the wire-producing department  14  computes the fourth confirmation data DK 4  and forwards them to both the wiring harness-assembling department  15  and the personal computer  16   a  of the production control department  16 . The wiring harness-assembling department  15  computes the fifth confirmation data DK 5  on the basis of the fourth confirmation data DK 4  and the second production data DT 2  and forwards the fifth confirmation data DK 5  to the personal computer  16   a  of the production control department  16 . The personal computer  16   a  forwards the fifth confirmation data DK 5  to the personal computer  43   a  of the wiring harness order-placing department  43 . 
     The respective departments  44 ,  45  and  46  produce the amount of the pellet, core wire  4  and additive, which meet the first, second and third ordered quantity data D 1 , D 2  and D 3 , respectively, that is, the ordered data D. The core wire-producing department  45  forwards the copper wire ordered quantity data DD to the personal computer  47   a  of the copper wire-producing department  47 . The copper wire-producing department  47  produces the amount of the copper wire, which meets the copper wire ordered quantity data DD, and transfers it to the core wire-producing department  45 . The respective departments  44 - 45  and  46  transfer the amount of the pellet, core wire  4  and additive, which meet the first, second and third ordered quantity data D 1 , D 2  and D 3 , respectively, that is, the ordered data D, to the wire-producing department  14 . Thus, in step S 2 , the respective amount of the pellet, core wire  4  and additive necessary to produce the wire  2  are collected and thereafter, the process proceeds to step S 3 . 
     In step S 3 , the core wire  4  transferred from the core wire-producing department  45  is supplied from the core wire-supplying unit  17  of the wire-producing department  14 , and the pellets and additive are put into the preblender  23 . The kneader  24  in the extrusion-coating unit  19  mixes the pellets and additive while moving the core wire  4 , and the extrusion head  26  extrusion-coats the mixture around the core wire  4 . 
     Thus, in step S 3 , the mixture of the pellets and additive is applied around the core wire  4  by the extrusion method while simultaneously mixing the pellets and additive, thereby producing the wire  2 , the outer surface  5   a  of which has the monochrome P. Further, the wire-producing department  14  applies a specific marking onto the wire  2 , crosslinks the wires  2 , cuts the wire  2  into a specific length and attaches a terminal fitting to an end of the wire  2 . Thus, the wire-producing department  14  produces the wire  2  of the monochrome P having a necessary length. The wire-producing department  14  transfers the produced wire  2  to the wiring harness-assembling department  15 , then the process advances to step S 4 . 
     In step S 4 , the wiring harness-assembling department  15  bundles a plurality of the wires  2 , inserts the terminal fitting into a connector housing and attaches a tube  9  for a harness, protector  10  for a harness, grommet  11  for a harness and clip  12  for wiring to respective specific portions of the wire  2 . Further, a tape  13  for a harness is wound around a specific portion of the wire  2 , thereby assembling a wiring harness  3 , then the process advances to step S 5 . 
     In step S 5 , the wiring harness-assembling department  15  carries out a continuity test and visual examination for the assembled wiring harness  3 , then the process advances to step S 6 . In step S 6 , the wiring harness-assembling department  15  transfers the assembled wiring harness  3  to the wiring harness order-placing department  43 . 
     Thus, according to the above-described preferred embodiment of the order-receiving production system  1  of a wiring harness, an order-receiving production method of the wire  2  can be obtained, which is characterized in that after receiving an order of the wiring harness  3 , i.e. of the wire  2 , the pellet consisting of the synthetic resin, which constitutes the coating  5  of the wire  2  for constituting the wiring harness  3 , the core wire  4  and the additive for mixing into the synthetic resin are collected with the respective necessary amount, thereafter the mixture of the pellets and additive is extrusion-coated around the core wire  4  while simultaneously mixing the pellets and additive, thereby the wire  2  having a necessary length is produced. 
     Further, an order-receiving production method of the wiring harness  3  can be obtained, which is characterized in that the desired components  8 ,  9 ,  10 ,  11  and  12  are attached to the produced wire  2  so as to assemble the wiring harness  3 , then the assembled wiring harness  3  is transferred to the wiring harness order-placing department  43 . 
     Further, an order-receiving production method of the wiring harness  3  can be obtained, which is characterized in that after receiving an order of the wiring harness  3 , i.e. of the wire  2 , the mixture of the pellets and additive is extrusion-coated around the core wire  4  while simultaneously mixing the pellets and additive, thereby the wire  2 , the outer-surface  5   a  of which has the monochrome P, is produced. 
     Further, an order-receiving production method of the wire  2  and an order-receiving production method of the wiring harness  3  can be obtained, each of which is characterized in that the outer surface  5   a  of the wire  2  having the monochrome P is colored with a desired color B. 
     Further, an order-receiving production method of the wire  2  and an order-receiving production method of the wiring harness  3  can be obtained, each of which is characterized in that after receiving an order of the wiring harness  3 , i.e. of the wire  2 , the mixture of the pellets and additive is extrusion-coated around the core wire  4  while simultaneously mixing the pellets and additive, thereby producing the wire  2 , and further the produced wires  2  are crosslinked. 
     Further, an order-receiving production system  1   a  of the wire  2  can be obtained, which is characterized in that the system  1   a  comprises: 
     the wire-producing department  14  for producing the wire  2 ; 
     the production control department  16  for controlling the wire-producing department  14  and receiving an order of the wire  2 ; 
     the resin-producing department  44  for producing a pellet; 
     the core wire-producing department  45  for producing the core wire  4 ; and 
     the additive-producing department  46  for producing the additive, wherein the production control department  16 : computes the first ordered quantity data D 1  indicating an amount of the pellet of synthetic resin for constituting the coating  5  of the wire  2  corresponding to the amount D of the wire  2  of the received order from the wiring harness order-placing department  43  and forwards the first ordered quantity data D 1  to the resin-producing department  44 ; computes the second ordered quantity data D 2  indicating an amount of the core wire  4  corresponding to the amount D of the wire  2  of the received order from the department  43  and forwards the second ordered quantity data D 2  to the core wire-producing department  45 ; and computes the third ordered quantity data D 3  indicating an amount of the additive to be added to the synthetic resin corresponding to the amount D of the wire  2  of the received order from the department  43  and forwards the third ordered quantity data D 3  to the additive-producing department  46 , 
     the producing departments  44 ,  45  and  46  produce the pellet, core wire  4  and additive to the amount corresponding to the first, second and third ordered quantity data D 1 , D 2  and D 3 , respectively, and send the produced pellet, core wire  4  and additive, respectively, to the wire-producing department  14 , and 
     the wire-producing department  14  extrudes a mixture of the pellets sent from the resin-producing department  44  and the additive sent from the additive-producing department  46  onto the circumference of the core wire  4  sent from the core wire-producing department  45  while simultaneously mixing the pellets and the additive so that the core wire  4  is coated with the mixture, thereby producing the wire  2  having a necessary length. 
     Further, an order-receiving production system  1  of the wiring harness  3  can be obtained, which is characterized in that the system  1  comprises: 
     the wire-producing department  14  for producing the wire  2 ; 
     the wiring harness-assembling department  15  for assembling the wiring harness  3  by using the wire  2  produced by the wire-producing department  14 ; 
     the production control department  16  for controlling the wire-producing department  14  and the wiring harness-assembling department  15 , and receiving an order of the wiring harness  3 ; 
     the resin-producing department  44  for producing a pellet; 
     the core wire-producing department  45  for producing the core wire  4 ; and 
     the additive-producing department  46  for producing the additive, wherein the production control department  16 : computes the first ordered quantity data D 1  indicating an amount of the pellet of synthetic resin for constituting the coating  5  of the wire  2  corresponding to the amount D of the wire  2  of the wiring harness  3  of the received order from the wiring harness order-placing department  43  and forwards the first ordered quantity data D 1  to the resin-producing department  44 ; computes the second ordered quantity data D 2  indicating an amount of the core wire  4  corresponding to the amount D of the wire  2  of the wiring harness  3  of the received order from the department  43  and forwards the second ordered quantity data D 2  to the core wire-producing department  45 ; and computes the third ordered quantity data D 3  indicating an amount of the additive to be added to the synthetic resin corresponding to the amount D of the wire  2  of the wiring harness  3  of the received order from the department  43  and forwards the third ordered quantity data D 3  to the additive-producing department  46 , 
     the producing departments  44 ,  45  and  46  produce the pellet, core wire  4  and additive to the amount corresponding to the first, second and third ordered quantity data D 1 , D 2  and D 3 , respectively, and send the produced pellet, core wire  4  and additive, respectively, to the wire-producing department  14 , 
     the wire-producing department  14  extrudes a mixture of the pellets sent from the resin-producing department  44  and the additive sent from the additive-producing department  46  onto the circumference of the core wire  4  sent from the core wire-producing department  45  while simultaneously mixing the pellets and the additive so that the core wire  4  is coated with the mixture, thereby producing the wire  2  having a necessary length, and sends the produced wire  2  to the wiring harness-assembling department  15 , and 
     the wiring harness-assembling department  15  attaches the desired components  8 ,  9 ,  10 ,  11  and  12  to the wire  2  produced by the wire-producing department  14 , thereby assembling the wiring harness  3 , and thereafter the assembled wiring harness  3  is transferred to the wiring harness order-placing department  43 . 
     According to the preferred embodiment, after receiving an order of the wiring harness  3 , i.e. of the wire  2 , the wire  2  of the monochrome P having a necessary length is produced. Therefore, the amount of the wire  2  to be stocked in advance can be reduced. Since the wire  2  having the monochrome P is used, the number of types (i.e. color) of the wire  2  to be stocked in advance can be reduced. 
     The production control department  16  forwards the data D 1 , D 2  and D 3  to the resin-producing department  44 , core wire-producing department  45  and additive-producing department  46 , respectively. Therefore, after receiving an order of the wiring harness  3 , i.e. of the wire  2 , the starting-material of the wire  2  can securely be collected. 
     Since the wire-producing department  14  extrusion-coats the mixture of the pellets and additive around the core wire  4  while simultaneously mixing the pellets and additive, a period of time required for the production of the wire  2  can be shortened compared to a case when the pellets and additive are mixed in a compounder. Therefore, even when the wire  2 , i.e. the wiring harness  3  is produced after receiving an order, the wire  2 , i.e. the wiring harness  3  can be produced in a desired period of time. Further, since the wire  2  is produced after receiving an order the amount of the wire  2  to be stocked in advance can be reduced. 
     Accordingly, a space for stocking the wire  2  in advance can be reduced and a space for temporarily stocking the wire  2  during the production can be reduced, thereby reducing the cost of the wire  2  or a product to be produced from the wire  2 , such as the wiring harness  3 . Since the wire  2  having a necessary length is produced after receiving an order of the wire  2 , thereby preventing the wire  2  from being produced excessively. 
     Since the outer surface  5   a  of the wire  2 , which is produced after receiving an order, has the monochrome P, thereby improving the production efficiency and reducing the number of the types (i.e. color) of the wire  2  to be stocked in advance. A space for stocking the wire  2  in advance can be reduced and a space for temporarily stocking the wire  2  during the production can be reduced, thereby reducing the cost of the wire  2  or a product to be produced from the wire  2 , such as the wiring harness  3 . 
     The wire-producing department  14  includes the coloring device  20  for marking the outer surface  5   a  of the wire  2  having the monochrome P. Therefore, the wire  2  colored with various colors B can be obtained. One wire can be distinguished from another wire, thereby preventing an error in wiring the wires  2  from occurring. Therefore, the quality of the wiring harness  3  can be prevented from deteriorating. 
     The wire-producing department  14  further includes the crosslinking unit  21  for crosslinking the wires  2 . Therefore, the wire  2 , the coating  5  of which has a specific strength can be obtained, thereby the wire  2  of the wiring harness  3  can have a predetermined strength. Therefore, the quality of the wiring harness  3  can be maintained. 
     In the wire-crosslinking device  21 , the wire  2  is tied up to the pair of the rollers  40   a  and  40   b  with the wire&#39;s sleeves tucked up inside the box  39  and an electron beam is irradiated onto the wires  2  situated at the center between the pair of the rollers  40   a  and  40   b . Therefore, by using only one electron gun  41 , an electron beam can securely be irradiated onto both sides  2   b  and  2   c  of the wire  2 . Accordingly, the size of the wire-crosslinking device  21  can be reduced and a space for installing the order-receiving production system  1  of the wiring harness  3  and a space for installing the order-receiving production system  1   a  of the wire  2  can be reduced. 
     If the wire  2  produced after receiving an order has non-color, the wire  2  can securely be colored with a desired color. 
     Further, the respective departments  44 ,  45  and  46  forward the respective first, second and third confirmation data DK 1 , DK 2  and DK 3  to the production control department  16 . The wire-producing department  14  forwards the fourth confirmation data DK 4  to the production control department  16 . The wiring harness-producing department  15  forwards the fifth confirmation data DK 5  to the production control department  16 . Therefore, the production control department  16  can have a clear grasp of the progress in the producing and assembling works of the wiring harness  3  or wire  2 . Since the production control department  16  forwards the data DK 5  to the wiring harness order-placing department  43 , the wiring harness order-placing department  43  can confirm the date of delivery and so on. 
     The wire-producing department  14  receives the data DK 1 , DK 2  and DK 3 . Therefore, the wire-producing department  14  can securely compute the data DK 4 . Since the data DK 4  is forwarded to the wiring harness-assembling department  15 , the wiring harness-assembling department  15  can securely compute the data DK 5 . 
     In the preferred embodiment described above, the wire-producing department  14  is separated from the core wire-producing department  45 . However, as shown in  FIG. 10 , the wire-producing department  14  may be included in the core wire-producing department  45 . 
     The core wire-producing department  45  includes the copper wire-supplying unit  55  and thin wire/twisted wire unit  56 . The copper wire-supplying unit  55  supplies the copper wire transferred from the copper wire-producing department  47 . The thin wire/twisted wire unit  56  forms the copper wire supplied by the copper wire-supplying unit  55  thin, twists these thin copper wires so as to produce the core wire  4 , and transfers the twisted wires to the core wire-supplying unit  17 . Even in a case as shown in  FIG. 10 , the wire  2  is produced after receiving an order of the wiring harness  3 , i.e. of the wire  2 . In the case as shown in  FIG. 10 , the copper wire-producing department  47  corresponds to the second producing department and the copper wire amount data DD corresponds to the second ordered quantity data. 
     In the preferred embodiment described above, the coloring device  20  and the crosslinking unit  21  is included in the wire-producing department  14 . However, the coloring device  20  and the crosslinking unit  21  may be included in the wiring harness-assembling department  15 . Thus, in the present invention, the coloring device  20  and the crosslinking unit  21  may be included in at least one of the wire-producing department  14  and the wiring harness-assembling department  15 . 
     In the preferred embodiment described above, the coloring device  20  colors a part of the outer surface  5   a  of the wire  2  by spouting a coloring agent with a specific amount. However, instead, the wire  2  may be dipped in a coloring agent, or alternatively, a coloring agent may be sprayed onto the whole outer surface  5   a  of the wire  2  so as to color the whole outer surface  5   a.    
     In the preferred embodiment described above, the wire  2  of the wiring harness  3  to be arranged in a motor vehicle is described. However, the wire  2  to be produced by using the method according to the present invention can be applied not only to a motor vehicle but also to various electronic equipment such as a portable computer or various electric machines. 
     As the coloring means for coloring the wire  2 , various measures such as dipping, spraying, spouting, printing and transcribing may be used. As the coloring agent and coating formulations, various materials such as acrylic coating formulations, ink (dye ink or pigment ink) and ultraviolet ink may be used. 
     In the present invention, the production control department  16 , resin-producing department  44 , core wire-producing department  45 , additive-producing department  46 , copper wire-producing department  47 , wire-producing department  14  and wiring harness-assembling department  15  may belong to the same organization, or alternatively, may belong to the respective different organization. Alternatively, at least two departments of the production control department  16 , resin-producing department  44 , core wire-producing department  45 , additive-producing department  46 , copper wire-producing department  47 , wire-producing department  14  and wiring harness-assembling department  15  may belong to the same organization. That is, the order-receiving production system  1  of a wiring harness consisting of the production control department  16 , resin-producing department  44 , core wire-producing department  45 , additive-producing department  46 , copper wire-producing department  47 , wire-producing department  14  and wiring harness-assembling department  15  may belong to a plurality of organizations, or alternatively, may belong to one organization. 
     The aforementioned preferred embodiments are described to aid in understanding the present invention and variations may be made by one skilled in the art without departing from the spirit and scope of the present invention. 
     INDUSTRIAL APPLICABILITY 
     As explained above, according to the invention, since the mixture of the pellets and the additive is extruded onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wire, the wire can be produced in a desired period of time. Further, since the wire is produced after receiving an order of the wire, an amount of the wire to be stocked in advance can be controlled. 
     Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. Further, the wire having a necessary length is produced after receiving an order of the wire, therefore an excess portion of the wire is never produced, thereby the resource-saving can be attained. 
     According to the invention, since an outer surface of the wire, which is produced after receiving an order of the wire, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. 
     According to the present invention, the outer surface of the wire produced is colored with a desired color to obtain the wire having the desired color. 
     According to the present invention, the wire produced is further crosslinked so as to obtain the wire, the coating of which has a specific strength. 
     According to the present invention, since the mixture of the pellets and the additive is extruded onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wiring harness, the wire can be produced in a desired period of time so as to assemble the wiring harness. Further, since the wire is produced after receiving an order of the wiring harness, an amount of the wire to be stocked in advance can be controlled. 
     Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. Further, the wire having a necessary length is produced after receiving an order of the wire, therefore an excess portion of the wire is never produced, thereby the resource-saving can be attained. 
     According to the present invention, since an outer surface of the wire, which is produced after receiving an order of the wiring harness, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the wiring harness using the wire from increasing. 
     According to the present invention, the outer surface of the wire produced is colored with a desired color to obtain the wire having the desired color. Then, the part is attached to the colored wire so as to assemble the wiring harness. Since the wire colored with various colors can be obtained, one wire can be distinguished from another wire, thereby preventing an error in wiring the wires from occurring. Therefore, the quality of the wiring harness can be prevented from deteriorating. 
     According to the present invention, the wire produced is further crosslinked so as to obtain the wire, the coating of which has a specific strength. Therefore, the wire in the wiring harness can have a predetermined strength. Therefore, the quality of the wiring harness can be maintained. 
     According to the present invention, the production control department forwards a first ordered quantity data indicating a necessary amount of the pellets, second ordered quantity data indicating a necessary amount of the core wire and third ordered quantity data indicating a necessary amount of the additive, each corresponding to the received order of the wire, to a first producing department, second producing department and third producing department, respectively. Therefore, after receiving the order of the wire, a necessary amount of the starting materials of the wire can securely be gathered. 
     Further, since wire-producing department extrudes the mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. Therefore, even if the wire is produced after receiving an order of the wire, the wire can be produced in a desired period of time. Further, since the wire is produced after receiving an order of the wire, an amount of the wire to be stocked in advance can be controlled. 
     Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. Further, the wire having a necessary length is produced after receiving an order of the wire, therefore an excess portion of the wire is never produced, thereby the resource-saving can be attained. 
     According to the invention, since an outer surface of the wire, which is produced after receiving an order of the wire, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. 
     According to the present invention, the system further comprises a coloring device for coloring the outer surface of the wire produced with a desired color. Therefore, the wire having the desired color can be obtained. 
     According to the present invention, the system further comprises a crosslinking device for crosslinking the wire so as to obtain the wire, the coating of which has a specific strength. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. Accordingly, the size of the wire-crosslinking device can be reduced and a space for the order-receiving production system can be reduced. 
     According to the present invention, the production control department forwards a first ordered quantity data indicating a necessary amount of the pellets, second ordered quantity data indicating a necessary amount of the core wire and third ordered quantity data indicating a necessary amount of the additive, each corresponding to the received order of the wire, to a first producing department, second producing department and third producing department, respectively. Therefore, after receiving the order of the wire, a necessary amount of the starting materials of the wire can securely be gathered. 
     Further, since wire-producing department extrudes the mixture of the pellets and the additive onto the circumference of the core wire while simultaneously mixing the pellets and the additive so that the core wire is coated with the mixture, a period of time required to produce the wire can be shorter than that in a case in which the pellets and the additive are mixed by a compounder. The wiring harness-assembling department attaches a desired component to the wire produced by the wire-producing department, thereby assembling a wiring harness. 
     Therefore, even if the wire is produced after receiving an order of the wiring harness, the wire can be produced in a desired period of time so as to assemble the wiring harness. Further, since the wire is produced after receiving an order of the wiring harness, an amount of the wire to be stocked in advance can be controlled. 
     Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the product using the wire from increasing. Further, the wire having a necessary length is produced after receiving an order of the wire, therefore an excess portion of the wire is never produced, thereby the resource-saving can be attained. 
     According to the present invention, since an outer surface of the wire, which is produced after receiving an order of the wiring harness, is monochromatic, therefore the production efficiency of the wire can be prevented from deteriorating and the types (i.e. types in color) of the wire to be stocked in advance can be controlled. Therefore, a space for stocking the wires in advance can be reduced and a space for storing the wire during the production of the wire also can be reduced, thereby preventing the cost of the wire and the wiring harness using the wire from increasing. 
     According to the present invention, at least one of the wire-producing department and the wiring harness-assembling department comprises a coloring device for coloring the outer surface of the wire produced with a desired color. Therefore, the wire having the desired color can be obtained. Then, the part is attached to the colored wire so as to assemble the wiring harness. Since the wire colored with various colors can be obtained, one wire can be distinguished from another wire, thereby preventing an error in wiring the wires from occurring. Therefore, the quality of the wiring harness can be prevented from deteriorating. 
     According to the present invention, the system further comprises a crosslinking device for crosslinking the wire so as to obtain the wire, the coating of which has a specific strength. Therefore, the wire in the wiring harness can have a predetermined strength. Therefore, the quality of the wiring harness can be prevented from deteriorating. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. Accordingly, the size of the wire-crosslinking device can be reduced and a space for the order-receiving production system can be reduced. 
     According to the present invention, in the wire-crosslinking device, the wire is tied up to the pair of the rollers with the wire&#39;s sleeves tucked up inside the box and an electron beam is irradiated onto the wires situated at the center between the pair of the rollers. Therefore, by using only one irradiation unit, an electron beam can securely be irradiated onto both sides of the wire. Accordingly, the size of the wire-crosslinking device can be reduced.