WO2016051772A1 - Steering wheel heater and production method therefor - Google Patents

Steering wheel heater and production method therefor Download PDF

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Publication number
WO2016051772A1
WO2016051772A1 PCT/JP2015/004942 JP2015004942W WO2016051772A1 WO 2016051772 A1 WO2016051772 A1 WO 2016051772A1 JP 2015004942 W JP2015004942 W JP 2015004942W WO 2016051772 A1 WO2016051772 A1 WO 2016051772A1
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Prior art keywords
electrode
heater
steering wheel
wire
wires
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PCT/JP2015/004942
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French (fr)
Japanese (ja)
Inventor
森　正裕
志朗 長谷川
香月　史朗
成利 日下
達也 飯島
Original Assignee
昭和電線デバイステクノロジー株式会社
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Publication of WO2016051772A1 publication Critical patent/WO2016051772A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/04—Hand wheels
    • B62D1/06—Rims, e.g. with heating means; Rim covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs

Definitions

  • the present invention relates to a heater for a steering wheel and a manufacturing method thereof.
  • a heater that warms the steering wheel has become widespread, especially in cold district specification cars.
  • This heater is attached to the rim portion of the steering wheel held by the driver's hand so as to cover the entire circumference.
  • the outer periphery of the heater is covered with a skin material such as leather. The driver can drive the automobile comfortably by gripping and driving the rim portion heated by the heater from the skin material.
  • a steering wheel heater there is known a structure in which electrodes are provided at both ends in one direction of a mesh heating element in which a plurality of heater wires are knitted in a mesh shape (for example, Patent Document 1). reference.). Since the heater body has a mesh structure, it can be attached to a rim having a complicated curved surface with sufficient adhesion, and there is an advantage that the shape of the heater during use is small.
  • this heater body part is comprised only by the heater wire, there was a case where this heater was disconnected when an excessively large force was applied instantaneously.
  • the use of only the heater wire leads to an increase in material cost and, in turn, an increase in product price, and there is a problem in terms of cost.
  • the product price has greatly increased.
  • the present invention has been made in response to the above problems of the prior art, and can suppress the occurrence of disconnection even when an excessively large force is momentarily applied, and also suppress the occurrence of temperature unevenness in the heater body.
  • An object of the present invention is to provide a steering wheel heater capable of reducing the cost and a method for manufacturing the same.
  • the present invention has the following embodiments [1] to [5].
  • [1] A heater attached to a rim portion of a steering wheel, a heater main body, a first electrode connected to one end in the longitudinal direction of the heater main body, and a second electrode connected to the other end
  • the heater body has a structure in which a plurality of non-conductive yarns and a plurality of heater wires that generate heat when energized are knitted in a mesh shape, and the heater wires in the heater body
  • the plurality of heater wires are soldered to the first electrode and the second electrode, and the plurality of non-conductive yarns are the first electrode and the second electrode.
  • a method for manufacturing a heater for a steering wheel [5] In the method for manufacturing a steering wheel heater according to [4], the cooling of the first electrode and the second electrode in the step (b) is performed on the heater body of the first electrode and the second electrode. The method for manufacturing a steering wheel heater according to [4], wherein the method is performed from a side edge to a portion of 1/5 to 4/5 of each width of the first electrode and the second electrode.
  • a heater for a steering wheel and a method for manufacturing the same are provided.
  • FIG. 3 is a sectional view taken along line II-II in FIG. 2. It is a top view explaining the connection method of the heater main-body part and 1st electrode (or 2nd electrode) in one Embodiment. It is a top view which shows the connection part of the heater main-body part at the time of connecting by the conventional method, and a 1st electrode (or 2nd electrode). It is a figure explaining the modification of one Embodiment of this invention. It is a figure which shows the example of application to the steering wheel of the heater for steering wheels of one Embodiment of this invention.
  • FIG. 1 is a plan view showing an embodiment of a steering wheel heater according to the present invention
  • FIG. 2 is a plan view showing the configuration of the main part thereof
  • FIG. 3 is a sectional view taken along the line II-II in FIG. .
  • the steering wheel heater 10 of this embodiment includes a heater body 1, a first electrode 2 ⁇ / b> A connected to one end of the heater body 1 in the longitudinal direction, and the other end.
  • a connected second electrode 2B, a lead wire 3 connected to the first electrode 2A and the second electrode 2B, and a connection terminal 4 for connecting the lead wire 3 to a power supply terminal (not shown) are provided.
  • the heater body 1 has a structure in which a plurality of heater wires 12 and a plurality of non-conductive yarns 14 that generate heat when energized are knitted in a mesh shape by, for example, knitting.
  • the heater wire 12 and the non-conductive yarn 14 are independently connected to the first electrode 2A and the second electrode 2B one by one. That is, if the mechanical entanglement due to the knitting is solved, the heater wire 12 and the non-conductive yarn 14 are arranged one by one, and the heater wire 12 forms a simple parallel circuit.
  • the heater wire 12 for example, a metal wire (bare wire) made of copper, copper-nickel alloy, copper-silver alloy, nickel-chromium alloy or the like is used. Moreover, the enameled wire which apply
  • a bare wire is used as the heater wire 12
  • an enameled wire is used as the heater wire 12 from the viewpoint of obtaining a stable resistance value.
  • Examples of the insulating paint to be applied and baked on the metal wire include those mainly composed of polyvinyl acetal resin, polyurethane resin, polyester resin, polyamideimide resin, polyimide resin and the like. Among these, polyurethane resins and polester resins are preferable in that they can be soldered relatively easily while having sufficient heat resistance.
  • the metal wire is preferably a copper-nickel alloy wire from the viewpoints of cost, ease of knitting, and long-term resistance stability.
  • non-conductive yarn 14 for example, a yarn made of a fiber such as polyester, rayon, nylon, aramid, cotton, hemp or the like is used.
  • heat resistance is relatively good, mechanical strength (especially tensile strength) is large, inexpensive, easy to obtain, and familiar with the metal wire or enamel wire used for the heater wire.
  • the heater wire 12 and the non-conductive yarn 14 have a diameter of 0.02 to 0.12 mm.
  • the range is preferable, the range of 0.04 to 0.10 mm is more preferable, and the range of 0.06 to 0.08 mm is even more preferable.
  • the wire diameter and thickness of the heater wire 12 and the non-conductive yarn 14 are not necessarily the same, but are preferably the same or substantially the same from the viewpoint of reducing surface irregularities.
  • the ratio of the heater wire 12 and the non-conductive yarn 14 in the heater body 1 is in the range of 1 to 2 for the non-conductive yarn 14 for the heater wire 12 for the braided number ratio. That is, the heater wire 12 and the non-conductive yarn 14 are knitted at equal intervals, and the knitting number ratio at this time is in the range of 1: 1 to 1: 2. If the ratio of the heater wires 12 is less than the above range, non-heated portions increase and temperature unevenness is likely to occur. Further, since heat is generated with a small number of heater wires, the temperature of each heater wire may become too high.
  • the ratio of the heater wires 12 exceeds the above range, the effect of suppressing the occurrence of disconnection of the heater wires when an excessively large force is instantaneously applied is reduced, and the effect of reducing the cost is also reduced.
  • “knitted at equal intervals” means that the intervals of the knitted materials are equal. For example, in FIG. 2, the distance between the leftmost heater wire (first heater wire) 12 and the non-conductive yarn 14 adjacent thereto, the non-conductive yarn 14 and the heater wire adjacent thereto (second wire). The heater wire 12 and the non-conductive yarn 14 are knitted so that the distance to the heater wire 12 is equal.
  • the arrangement method of the heater wire 12 and the non-conductive yarn 14 is not particularly limited. However, in order to suppress the occurrence of temperature unevenness, the heater wire 12 when an excessively large force is applied instantaneously is used. In order to suppress the occurrence of disconnection, it is preferable to arrange them as evenly as possible. Specifically, for example, as shown in FIG. 2, there is a method in which one heater wire 12 and one or two non-conductive yarns 14 are alternately arranged in the width direction of the heater body 1 and two For example, a heater wire 12 and 2 to 4 non-conductive yarns 14 may be alternately arranged. In the example of FIG. 2, one heater wire 12 and one nonconductive yarn 14 are alternately arranged.
  • Knitted knitting refers to a knitting method in which loops are continuously and planarly bound in the warp direction.
  • Tricot knitting refers to warp knitting. Among these, tricot knitting is preferable because it is flexible and excellent in stretchability and can be sufficiently adhered to a rim portion having a complicated curved surface.
  • both ends of the heater wire 12 and the nonconductive thread 14 are fixed to the first electrode 2A and the second electrode 2B by solder 16, respectively.
  • the first electrode 2A and the second electrode 2B are preliminarily cut into a rectangular shape having a predetermined width and length, and have a thickness of, for example, 0.01 to 0.5 mm, preferably 0.05 to 0.2 mm.
  • Consists of The metal foil preferably has excellent conductivity and corrosion resistance, such as copper foil plated with tin, solder, gold, etc., or gold, silver, nickel, etc. having conductivity and corrosion resistance itself.
  • the non-ferrous metal foil is preferably used.
  • solder one having a high flux content, good high temperature characteristics and excellent wettability is preferable, and lead-free solder is preferable from the viewpoint of environmental protection.
  • a tin-silver-copper system, a tin-silver-bismuth system, a tin-silver-copper-bismuth system, and the like are preferable.
  • the solder generally has a melting temperature of 200 ° C. or more. At this temperature, the non-conductive yarn 14 usually melts and disappears, or carbonizes and loses the wettability of the solder, and soldering becomes impossible. .
  • the non-conductive yarn 14 as well as the heater wire 12 is securely fixed to the electrodes 2A and 2B.
  • the ends of the heater wire 12 and the non-conductive yarn 14 are placed on the first electrode 2A (or the second electrode 2B), and the solder 16 is overlaid thereon. Then, the solder 16 is melted by the soldering iron, and spreads thinly (eg, 5 to 30 ⁇ m thick) and uniformly over substantially the entire surface of the first electrode 2A (or the second electrode 2B). At that time, a portion of the first electrode 2A (or the second electrode 2B) near the heater main body 42 is blown over a width A over which cold air is blown, a pipe through which cold water passes is brought into contact with the portion, or thermal conductivity. This is performed while cooling by a method such as bringing a metal jig that is high and advantageous for radiation into contact with the first electrode 2A (or the second electrode 2B).
  • the non-conductive yarn 14 located in the cooled portion 42 is melted or lost or carbonized. Is prevented and melted and fixed on the first electrode 2A (or the second electrode 2B) (that is, melted and fixed). Specifically, the end portion of the non-conductive yarn 14 is melted, and the melted portion is cooled and solidified to be fixed to the first electrode 2A. Since the temperature of the solder 16 of the cooled portion 42 is lower than that of the portion that has not been cooled, the nonconductive yarn 14 is fixed without melting and disappearing, and a sufficient mechanical connection strength is ensured.
  • the heater wire 12 is securely fixed by the complete solder 16 in a portion where the cooling is not performed. For this reason, the connection strength between the heater body 1 and the first electrode 2A (or the second electrode 2B) can be greatly improved as compared to the case where cooling is not performed as shown in FIG.
  • FIG. 5 shows an example of soldering without performing any cooling.
  • the heater wire 12 is fixed to the first electrode 2A (or the second electrode 2B) with solder, but the non-conductive yarn 14 melts and disappears, and the first electrode 2A (or the second electrode 2B). Not fixed to.
  • the non-conductive yarn 14 in the portion that has not been cooled is Although melted and disappeared, the non-conductive yarn 14 is fixed to the first electrode 2A (or the second electrode 2B) in the cooled portion 42.
  • the heater wire 12 is fixed to the first electrode 2A (or the second electrode 2B) by soldering as in the example of FIG. Therefore, the heater body 1 and the first electrode 2A (or the second electrode 2B) are connected with higher strength than in the example of FIG.
  • the width A of the portion 42 to be cooled can be 1/5 to 4/5 of the width W of the first electrode 2A (or the second electrode 2B).
  • the width is less than 1/5 of the width W of the first electrode 2A (or the second electrode 2B)
  • the connection strength of the non-conductive yarn 14 becomes insufficient.
  • the ratio exceeds 4/5
  • the soldering portion performed under normal conditions decreases, the connection strength of the heater wire 12 decreases, and the heater body 1 and the first electrode 2A (or second electrode 2B) 2
  • the width A is more preferably in the range of 1 ⁇ 4 to 3 of the width W of the first electrode 2A (or the second electrode 2B).
  • FIG. 6B shows the first electrode 2 ⁇ / b> A (or the second electrode 2 ⁇ / b> B) after being sandwiched between the insulating protective tapes 5.
  • the protective tape 5 it is preferable to use a non-woven fabric made of, for example, polyester fiber or aramid fiber, which is flexible, excellent in elasticity, and heat resistant.
  • a tape made of a nonwoven fabric that has been subjected to a flame retardant treatment is more preferred.
  • the material for the protective tape other than the nonwoven fabric include a polyimide tape, a fluororesin tape, and a vinyl chloride tape.
  • a silicone type, an acrylic type, a thermosetting rubber type, or the like is preferable from the viewpoints of flame retardancy and heat resistance.
  • FIG. 7 is a view showing an example of a steering wheel 70 equipped with the steering wheel heater 10 of the present embodiment.
  • the steering wheel 70 is arranged at a substantially central position of a rim portion 71 formed by covering the outer periphery of a reinforcing core member formed in an annular shape with a synthetic resin, and the annular rim portion 71.
  • the boss part 74 connected to the steering shaft 73 and the spoke part 75 that extends from the inner diameter side of the rim part 71 toward the boss part 74 and connects the rim part 71 and the boss part 74 are mainly configured. Yes.
  • the steering wheel heater 10 of the present embodiment covers the entire circumference of the annular rim portion 71, and the first electrode 2A and the second electrode 2B have a low probability that the driver of the rim portion 1 touches the hand, for example, When the traveling direction of the automobile is straight, the rim portion 1 is positioned so as to face each other at the lower position.
  • the steering wheel heater 10 is fixed to the rim 71 with a double-sided adhesive tape or an adhesive.
  • the lead wire 3 connected to the first electrode 2 ⁇ / b> A and the second electrode 2 ⁇ / b> B is connected along the inner diameter side surface of the rim portion 71 and then inserted into the spoke portion 75 and connected to the lead wire 3.
  • a terminal (not shown) is connected to a power supply terminal (not shown).
  • the steering wheel heater 10 fixed to the rim portion 71 is further covered with a skin material 76 such as leather.
  • the steering wheel 70 configured as described above, for example, when power is supplied from the power supply terminal to the first electrode 2A via the lead wire 3, the current is supplied from the plurality of heater wires of the heater body to the first electrode 2A.
  • the heater wire generates heat by this energization, and the steering wheel 70 is warmed. As a result, the driver can comfortably operate the steering wheel 70.
  • the heater main body has a structure in which a plurality of non-conductive yarns and a plurality of heater wires that generate heat when energized are knitted in a mesh shape, and the heater main body Since the ratio of the number of braids between the heater wire and the non-conductive yarn is in the range of 1: 1 to 1: 2, the heater wire is excessively instantaneously attached to the steering wheel. Even when a large force is applied, the occurrence of disconnection of the heater wire can be suppressed, and the occurrence of temperature unevenness in the heater body can also be suppressed.
  • the heater wire is fixed to the first electrode and the second electrode by solder and the non-conductive yarn is melted and fixed to the first electrode and the second electrode, the heater main body and the electrode are connected with high strength. be able to. Moreover, since it is easy to obtain and an inexpensive nonelectroconductive thread
  • Example 1 10 2UEW enameled wires (type 2 polyurethane copper wire) with a wire diameter of 0.075 mm, 20 75 denier polyester yarns, 1 enameled wire (type 2 polyurethane copper wire), and 2 polyester yarns alternately Then, a net-like heating element having a length of about 1100 mm and a width of about 80 mm was produced by knitting with knitting. Next, an electrode having a length of 81 mm, a width of 7 mm, and a thickness of 0.1 mm made from a tin-plated copper foil was described with reference to FIG. 4 using solder (lead-free) at both ends in the length direction of the heating element.
  • the steering wheel heater was manufactured according to the method, and the ratio of the number of braided enamel wires and polyester yarns in the heater main body was 1: 2. During soldering, the heating element side of the electrode was cooled over a width of 1/3. The cooling was performed using a special cooling jig. Moreover, the lead wire was also fixed to the electrode.
  • the polyester yarn was not melted by solder, and all of the 2UEW enameled wires were fixed to the electrode, and the polyester yarn was all melt-fixed to the electrode.
  • the heater for the steering wheel was energized, no temperature unevenness that was a practical problem was found.
  • Example 2 The same as in Example 1, except that the number of 2UEW enameled wires and the number of polyester yarns were 15 respectively, and the enameled wires and the polyester yarns were alternately knitted with knitting to produce a mesh-like heating element.
  • a heater for a steering wheel in which the volume ratio of the enameled wire and the polyester yarn in the heater body was 1: 1 was manufactured.
  • Example 1 When the obtained heater for the steering wheel was observed, as in Example 1, the polyester yarn was not melted by soldering, and no temperature unevenness that was a practical problem due to energization was observed.
  • the number of 2UEW enameled wires and polyester yarns is 8 and 22, respectively, and these are knit so that one enameled wire, two polyester yarns, one enameled wire and three polyester yarns are repeated in the width direction.
  • a steering wheel heater was manufactured in the same manner as in Example 1 except that a net-like heating element was produced and a volume ratio of the enamel wire of the heater body to the polyester yarn was 2: 5.
  • Example 1 When the obtained heater for the steering wheel was observed, as in Example 1, the polyester yarn was not melted by soldering. However, when energized, more temperature unevenness was observed than in Example 1 and Example 2. It was.
  • SYMBOLS 1 Heater main-body part, 2A ... 1st electrode, 2B ... 2nd electrode, 3 ... Lead wire, 4 ... Connection terminal, 5 ... Insulating protective tape, 10 ... Steering wheel heater, 12 ... Heater wire, 14 ... Non Conductive thread, 16 ... solder, 70 ... steering wheel, 71 ... rim part.

Abstract

The heater (10) is to be mounted on the rim portion (71) of a steering wheel (70), and comprises a heater main body part (1), a first electrode (2A) connected to one extremity portion in the length direction of the heater main body part (2), and a second electrode (2B) connected to the other extremity portion. The heater main body part (1) has a structure wherein a plurality of heating wires (12), which generate heat upon electrification, and a plurality of electrically non-conductive wires (14) are woven into a mesh form. The proportion of the number of woven-in wires between the heating wires (12) and the electrically non-conductive wires (14) in the heater main body part (1) is in the range of 1:1 to 1:2.

Description

ステアリングホイール用ヒータおよびその製造方法Steering wheel heater and manufacturing method thereof
　本発明は、ステアリングホイール用ヒータ、およびその製造方法に関する。 The present invention relates to a heater for a steering wheel and a manufacturing method thereof.
　寒冷地仕様の自動車を中心に、ステアリングホイールを暖めるヒータが普及してきている。このヒータは、運転者の手によって握られるステアリングホイールのリム部に、その全周を覆うように取り付けられる。そして、そのヒータの外周には、皮革などの表皮材が被覆される。運転者は、ヒータで暖められたリム部を表皮材上から握って運転することで、快適に自動車を走行させることができる。 A heater that warms the steering wheel has become widespread, especially in cold district specification cars. This heater is attached to the rim portion of the steering wheel held by the driver's hand so as to cover the entire circumference. The outer periphery of the heater is covered with a skin material such as leather. The driver can drive the automobile comfortably by gripping and driving the rim portion heated by the heater from the skin material.
　このようなステアリングホイール用ヒータとして、複数のヒータ線が網目状に編まれた網目状発熱体の一方向の両端部に電極が設けられた構造のものが知られている（例えば、特許文献１参照。）。ヒータ本体部が網目構造であるため、複雑な曲面からなるリム部にも十分に密着させて装着することができ、また使用時の型崩れも少ないという利点を有する。 As such a steering wheel heater, there is known a structure in which electrodes are provided at both ends in one direction of a mesh heating element in which a plurality of heater wires are knitted in a mesh shape (for example, Patent Document 1). reference.). Since the heater body has a mesh structure, it can be attached to a rim having a complicated curved surface with sufficient adhesion, and there is an advantage that the shape of the heater during use is small.
　しかしながら、このヒータは、ヒータ本体部がヒータ線のみで構成されているため、瞬間的に過度の大きな力が加わった場合に断線することがあった。また、ヒータ線のみの使用は材料コストの上昇、ひいては製品価格の上昇に繋がり、コスト面でも問題があった。特に、リム部への密着性をより高めるため、柔軟な銀を含む合金をヒータ線材料に使用した場合には、製品価格は大きく上昇した。
　これらの問題に対し、例えば、ヒータ線の一部を安価な非導電性の糸で代替させることが考えられるが、ヒータ本体部に温度ムラを生じるおそれがある。 However, since this heater body part is comprised only by the heater wire, there was a case where this heater was disconnected when an excessively large force was applied instantaneously. In addition, the use of only the heater wire leads to an increase in material cost and, in turn, an increase in product price, and there is a problem in terms of cost. In particular, when an alloy containing soft silver is used for the heater wire material in order to further improve the adhesion to the rim portion, the product price has greatly increased.
To solve these problems, for example, it is conceivable to replace a part of the heater wire with an inexpensive non-conductive thread, but there is a possibility that temperature unevenness may occur in the heater body.
特開２００１－１１０５５５号公報Japanese Patent Laid-Open No. 2001-110555
　本発明は上記従来技術の課題に対処してなされたもので、瞬間的に過度の大きな力が加わった場合であっても断線の発生を抑制でき、またヒータ本体部の温度ムラの発生を抑制でき、かつコストの低減を図ることができるステアリングホイール用ヒータ、およびその製造方法を提供することを目的とする。 The present invention has been made in response to the above problems of the prior art, and can suppress the occurrence of disconnection even when an excessively large force is momentarily applied, and also suppress the occurrence of temperature unevenness in the heater body. An object of the present invention is to provide a steering wheel heater capable of reducing the cost and a method for manufacturing the same.
　上記目的を達成するため、本発明は下記［１］～［５］の実施形態を有する。
　［１］ステアリングホイールのリム部に取り付けられるヒータであって、ヒータ本体部と、前記ヒータ本体部の長手方向の一方の端部に接続した第１電極および他方の端部に接続した第２電極と、を備え、前記ヒータ本体部は、複数の非導電性糸と、通電時に発熱する複数のヒータ線と、が網目状に編まれた構造を有し、前記ヒータ本体部における前記ヒータ線と前記非導電性糸との編込み本数比率が１：１～１：２の範囲であることを特徴とするステアリングホイール用ヒータ。
　［２］［１］記載のステアリングホイール用ヒータにおいて、複数の前記ヒータ線は前記第１電極および前記第２電極に半田付けされており、複数の前記非導電性糸は前記第１電極および前記第２電極に溶融固着していることを特徴とする［１］記載のステアリングホイール用ヒータ。
　［３］［１］または［２］記載のステアリングホイール用ヒータにおいて、複数の前記非導電性糸は、ポリエステル糸、レーヨン糸およびナイロン糸から選ばれる少なくとも1種を含むことを特徴とするステアリングホイール用ヒータ。
　［４］［１］乃至［３］のいずれかのステアリングホイール用ヒータの製造方法であって、（ａ）前記ヒータ本体部の複数の前記非導電性糸および複数の前記ヒータ線それぞれの一方の端部を第１電極上に配置し、他方の端部を第２電極上に配置する工程と、（ｂ）前記第１電極および前記第２電極の前記ヒータ本体部寄りの部分を冷却しながら、複数の前記ヒータ線を前記第１電極および前記第２電極上に半田付けするとともに、複数の前記非導電性糸を前記第１電極および前記第２電極上に溶融固着する工程と、を含むことを特徴とするステアリングホイール用ヒータの製造方法。
　［５］［４］記載のステアリングホイール用ヒータの製造方法において、（ｂ）の工程における前記第１電極および前記第２電極に対する冷却は、前記第１電極および前記第２電極の前記ヒータ本体部側端縁から、前記第１電極および前記第２電極の各幅の１／５～４／５の部分に対し行われることを特徴とする［４］に記載のステアリングホイール用ヒータの製造方法。 In order to achieve the above object, the present invention has the following embodiments [1] to [5].
[1] A heater attached to a rim portion of a steering wheel, a heater main body, a first electrode connected to one end in the longitudinal direction of the heater main body, and a second electrode connected to the other end The heater body has a structure in which a plurality of non-conductive yarns and a plurality of heater wires that generate heat when energized are knitted in a mesh shape, and the heater wires in the heater body A heater for a steering wheel, wherein a ratio of the number of braids to the non-conductive yarn is in a range of 1: 1 to 1: 2.
[2] In the steering wheel heater according to [1], the plurality of heater wires are soldered to the first electrode and the second electrode, and the plurality of non-conductive yarns are the first electrode and the second electrode. The heater for a steering wheel according to [1], wherein the heater is melt-fixed to the second electrode.
[3] The steering wheel heater according to [1] or [2], wherein the plurality of non-conductive yarns include at least one selected from a polyester yarn, a rayon yarn, and a nylon yarn. Heater.
[4] A method for manufacturing a steering wheel heater according to any one of [1] to [3], wherein: (a) one of each of the plurality of non-conductive yarns and the plurality of heater wires of the heater main body. Disposing the end on the first electrode and disposing the other end on the second electrode; and (b) cooling the portion of the first electrode and the second electrode near the heater body. Soldering the plurality of heater wires onto the first electrode and the second electrode, and melting and fixing the plurality of non-conductive yarns onto the first electrode and the second electrode. A method for manufacturing a heater for a steering wheel.
[5] In the method for manufacturing a steering wheel heater according to [4], the cooling of the first electrode and the second electrode in the step (b) is performed on the heater body of the first electrode and the second electrode. The method for manufacturing a steering wheel heater according to [4], wherein the method is performed from a side edge to a portion of 1/5 to 4/5 of each width of the first electrode and the second electrode.
　本発明によれば、瞬間的に過度の大きな力が加わった場合であっても断線の発生を抑制でき、またヒータ本体部分の温度ムラの発生を抑制でき、かつコストの低減を図ることができるステアリングホイール用ヒータ、およびその製造方法が提供される。 According to the present invention, even when an excessively large force is momentarily applied, the occurrence of disconnection can be suppressed, the occurrence of temperature unevenness in the heater body portion can be suppressed, and the cost can be reduced. A heater for a steering wheel and a method for manufacturing the same are provided.
本発明のステアリングホイール用ヒータの一実施形態を示す平面図である。It is a top view which shows one Embodiment of the heater for steering wheels of this invention. 図１のステアリングホイール用ヒータの要部構成を示す平面図である。It is a top view which shows the principal part structure of the heater for steering wheels of FIG. 図２のII－II線に沿う断面図である。FIG. 3 is a sectional view taken along line II-II in FIG. 2. 一実施形態におけるヒータ本体部と第１電極（または第２電極）との接続方法を説明する平面図である。It is a top view explaining the connection method of the heater main-body part and 1st electrode (or 2nd electrode) in one Embodiment. 従来の方法で接続した場合のヒータ本体部と第１電極（または第２電極）の接続部分を示す平面図である。It is a top view which shows the connection part of the heater main-body part at the time of connecting by the conventional method, and a 1st electrode (or 2nd electrode). 本発明の一実施形態の変形例を説明する図である。It is a figure explaining the modification of one Embodiment of this invention. 本発明の一実施形態のステアリングホイール用ヒータのステアリングホイールへの適用例を示す図である。It is a figure which shows the example of application to the steering wheel of the heater for steering wheels of one Embodiment of this invention.
　以下、本発明の実施の形態を説明する。なお、説明は図面に基づいて行うが、それらの図面は単に図解のために提供されるものであって、本発明はそれらの図面により何ら限定されるものではない。また、各図において、共通する部分には同一符号を付している。 Hereinafter, embodiments of the present invention will be described. Although the description will be made based on the drawings, the drawings are provided for illustration only, and the present invention is not limited to the drawings. Moreover, in each figure, the same code | symbol is attached | subjected to the common part.
　図１は、本発明のステアリングホイール用ヒータの一実施形態を示す平面図、図２は、その要部構成を示す平面図、図３は、図２のII－II線に沿う断面図である。 FIG. 1 is a plan view showing an embodiment of a steering wheel heater according to the present invention, FIG. 2 is a plan view showing the configuration of the main part thereof, and FIG. 3 is a sectional view taken along the line II-II in FIG. .
　図１に示すように、本実施形態のステアリングホイール用ヒータ１０は、ヒータ本体部１と、前記ヒータ本体部１の長手方向の一方の端部に接続した第１電極２Ａおよび他方の端部に接続した第２電極２Ｂと、第１電極２Ａおよび第２電極２Ｂに接続されたリード線３と、リード線３を電源端子（図示なし）に接続するための接続端子４とを備えている。 As shown in FIG. 1, the steering wheel heater 10 of this embodiment includes a heater body 1, a first electrode 2 </ b> A connected to one end of the heater body 1 in the longitudinal direction, and the other end. A connected second electrode 2B, a lead wire 3 connected to the first electrode 2A and the second electrode 2B, and a connection terminal 4 for connecting the lead wire 3 to a power supply terminal (not shown) are provided.
　ヒータ本体部１は、図２に示すように、通電により発熱する複数のヒータ線１２と複数の非導電性糸１４とが、例えばメリヤス編みなどにより、網目状に編まれた構造を有する。そして、ヒータ線１２および非導電性糸１４は、１本ずつが独立して第１電極２Ａおよび第２電極２Ｂに接続されている。すなわち、編まれたことによる機械的な絡み合いを解けば、ヒータ線１２および非導電性糸１４は１本ずつが並列しており、ヒータ線１２は単純な並列回路を形成している。 As shown in FIG. 2, the heater body 1 has a structure in which a plurality of heater wires 12 and a plurality of non-conductive yarns 14 that generate heat when energized are knitted in a mesh shape by, for example, knitting. The heater wire 12 and the non-conductive yarn 14 are independently connected to the first electrode 2A and the second electrode 2B one by one. That is, if the mechanical entanglement due to the knitting is solved, the heater wire 12 and the non-conductive yarn 14 are arranged one by one, and the heater wire 12 forms a simple parallel circuit.
　上記ヒータ線１２としては、例えば、銅、銅－ニッケル合金、銅－銀合金、ニッケル－クロム合金などからなる金属線（裸線）が使用される。また、これらの金属線に、絶縁塗料を塗布焼付けたエナメル線を使用することもできる。ヒータ線１２として裸線を使用した場合、交点におけるヒータ線１２同士の接触状態によって抵抗変動が大きくなる可能性がある。そのため、安定した抵抗値を得るという観点から、ヒータ線１２として、エナメル線を使用することが好ましい。金属線に塗布焼付ける絶縁塗料としては、ポリビニルアセタール樹脂、ポリウレタン樹脂、ポリエステル樹脂、ポリアミドイミド樹脂、ポリイミド樹脂などを主成分とするものが挙げられる。これらのなかでも、ポリウレタン樹脂およびポルエステル樹脂は、十分な耐熱性を有しつつ比較的容易に半田付けを行うことができる点で好ましい。また、金属線としては、コスト面、編みやすさ、長期間の抵抗安定性などの点から、銅－ニッケル合金線が好ましい。 As the heater wire 12, for example, a metal wire (bare wire) made of copper, copper-nickel alloy, copper-silver alloy, nickel-chromium alloy or the like is used. Moreover, the enameled wire which apply | coated and baked the insulating paint to these metal wires can also be used. When a bare wire is used as the heater wire 12, there is a possibility that the resistance fluctuation becomes large depending on the contact state of the heater wires 12 at the intersection. Therefore, it is preferable to use an enameled wire as the heater wire 12 from the viewpoint of obtaining a stable resistance value. Examples of the insulating paint to be applied and baked on the metal wire include those mainly composed of polyvinyl acetal resin, polyurethane resin, polyester resin, polyamideimide resin, polyimide resin and the like. Among these, polyurethane resins and polester resins are preferable in that they can be soldered relatively easily while having sufficient heat resistance. The metal wire is preferably a copper-nickel alloy wire from the viewpoints of cost, ease of knitting, and long-term resistance stability.
　また、非導線性糸１４としては、例えば、ポリエステル、レーヨン、ナイロン、アラミド、綿、麻などの繊維からなる糸が使用される。これらのなかでも、耐熱性が比較的良好で、機械的強度(特に、引張強さ)が大きく、かつ安価で、入手しやすいうえ、ヒータ線の用いる金属線またはエナメル線となじみが良く網目状に編み込みやすい、ポリエステル、レーヨン、ナイロンからなる糸が好ましい。 Further, as the non-conductive yarn 14, for example, a yarn made of a fiber such as polyester, rayon, nylon, aramid, cotton, hemp or the like is used. Among these, heat resistance is relatively good, mechanical strength (especially tensile strength) is large, inexpensive, easy to obtain, and familiar with the metal wire or enamel wire used for the heater wire. A yarn made of polyester, rayon, or nylon, which is easy to weave, is preferred.
　これらのヒータ線１２および非導線性糸１４の線径乃至太さは、編みやすさ、リム部に対する密着性、機械的強度などを考慮すると、ヒータ線１２は、０．０２～０．１２ｍｍの範囲が好ましく、０．０４～０．１０ｍｍの範囲がより好ましく、０．０６～０．０８ｍｍの範囲がより一層好ましい。また、非導線性糸１４は、太さが３０～１５０デニールのものを使用することが好ましく、５０～１００デニールであるとより好ましく、５０～７５デニールであるとより一層好ましい。なお、ヒータ線１２と非導線性糸１４の線径、太さは、必ずしも同じである必要はないが、表面の凹凸を少なくする観点からは、同一乃至略同一であることが好ましい。 Considering ease of knitting, adhesion to the rim, mechanical strength, etc., the heater wire 12 and the non-conductive yarn 14 have a diameter of 0.02 to 0.12 mm. The range is preferable, the range of 0.04 to 0.10 mm is more preferable, and the range of 0.06 to 0.08 mm is even more preferable. Further, it is preferable to use a non-conducting yarn 14 having a thickness of 30 to 150 denier, more preferably 50 to 100 denier, and even more preferably 50 to 75 denier. The wire diameter and thickness of the heater wire 12 and the non-conductive yarn 14 are not necessarily the same, but are preferably the same or substantially the same from the viewpoint of reducing surface irregularities.
　本発明において、ヒータ本体部１におけるヒータ線１２と非導電性糸１４の割合は、編込み本数比率でヒータ線１２が１に対し非導電性糸１４が１～２の範囲である。すなわち、ヒータ線１２と非導電性糸１４は、均等な間隔で編み込まれており、このときの編込み本数比率は１：１～１：２の範囲とされている。ヒータ線１２の割合が前記範囲に満たないと、非加熱部分が多くなって温度ムラが生じやすくなる。また、少ないヒータ線で発熱させるため、個々のヒータ線の温度が高くなり過ぎるおそれがある。一方、ヒータ線１２の割合が前記範囲を超えると、瞬間的に過度の大きな力が加わった場合のヒータ線の断線の発生を抑制する効果が小さくなり、また、コスト低減に対する効果も小さくなる。ここで、「均等な間隔で編み込まれている」とは、編み込まれた物質の間隔が等しいことをいう。例えば図２においては、左端のヒータ線（第１のヒータ線）１２とこれに隣接する非導電性糸１４との距離と、この非導電性糸１４とこれに隣接するヒータ線（第２のヒータ線）１２との距離が等しくなるように、ヒータ線１２および非導電性糸１４が編み込まれている。 In the present invention, the ratio of the heater wire 12 and the non-conductive yarn 14 in the heater body 1 is in the range of 1 to 2 for the non-conductive yarn 14 for the heater wire 12 for the braided number ratio. That is, the heater wire 12 and the non-conductive yarn 14 are knitted at equal intervals, and the knitting number ratio at this time is in the range of 1: 1 to 1: 2. If the ratio of the heater wires 12 is less than the above range, non-heated portions increase and temperature unevenness is likely to occur. Further, since heat is generated with a small number of heater wires, the temperature of each heater wire may become too high. On the other hand, when the ratio of the heater wires 12 exceeds the above range, the effect of suppressing the occurrence of disconnection of the heater wires when an excessively large force is instantaneously applied is reduced, and the effect of reducing the cost is also reduced. Here, “knitted at equal intervals” means that the intervals of the knitted materials are equal. For example, in FIG. 2, the distance between the leftmost heater wire (first heater wire) 12 and the non-conductive yarn 14 adjacent thereto, the non-conductive yarn 14 and the heater wire adjacent thereto (second wire). The heater wire 12 and the non-conductive yarn 14 are knitted so that the distance to the heater wire 12 is equal.
　ヒータ線１２と非導電性糸１４の配置方法は、特に限定されるものではないが、温度ムラの発生を抑制するため、また、瞬間的に過度の大きな力が加わった場合のヒータ線１２の断線の発生を抑制するため、できるだけ均等に配置されるようにすることが好ましい。具体的には、例えば、図２に示すように、ヒータ本体部１の幅方向に、１本のヒータ線１２と１～２本の非導電性糸１４を交互に配置する方法、２本のヒータ線１２と２～４本の非導電性糸１４を交互に配置する方法などが挙げられる。図２の例では、１本のヒータ線１２と１本の非導電性糸１４が交互に配置されている。 The arrangement method of the heater wire 12 and the non-conductive yarn 14 is not particularly limited. However, in order to suppress the occurrence of temperature unevenness, the heater wire 12 when an excessively large force is applied instantaneously is used. In order to suppress the occurrence of disconnection, it is preferable to arrange them as evenly as possible. Specifically, for example, as shown in FIG. 2, there is a method in which one heater wire 12 and one or two non-conductive yarns 14 are alternately arranged in the width direction of the heater body 1 and two For example, a heater wire 12 and 2 to 4 non-conductive yarns 14 may be alternately arranged. In the example of FIG. 2, one heater wire 12 and one nonconductive yarn 14 are alternately arranged.
　また、ヒータ線１２と非導電性糸１４の編み方としては、メリヤス編みの他、トリコット編み等が挙げられる。メリヤス編みとは、ループを経方向に連続的、かつ平面的に綴る編み方をいう。また、トリコット編みとは、経編みメリヤスのことをいう。これらのなかでも、トリコット編みが、柔軟で伸縮性に優れており、複雑な曲面からなるリム部に対し十分に密着させることができることから好ましい。 Further, as a method of knitting the heater wire 12 and the non-conductive yarn 14, there are knitting, tricot knitting, and the like. Knitted knitting refers to a knitting method in which loops are continuously and planarly bound in the warp direction. Tricot knitting refers to warp knitting. Among these, tricot knitting is preferable because it is flexible and excellent in stretchability and can be sufficiently adhered to a rim portion having a complicated curved surface.
　本実施形態では、図３に示すように、ヒータ線１２と非導電性糸１４の両端部は第１電極２Ａおよび第２電極２Ｂにそれぞれ半田１６により固定されている。
　第１電極２Ａおよび第２電極２Ｂは、予め所定の幅、長さの矩形状に切断した、厚さが、例えば０．０１～０．５ｍｍ、好ましくは０．０５～０．２ｍｍの金属箔から構成される。金属箔としては、導電性および耐腐食性に優れるものが好ましく、銅箔に錫、半田、金などのめっきを施したものや、それ自体導電性および耐腐食性を有する金、銀、ニッケルなどの非鉄金属箔が好適に使用される。また、半田としては、フラックス含有量が多く、高温特性が良好で、かつ濡れ性に優れるものが好ましく、また、環境保全の観点から、鉛フリーの半田が好ましい。具体的には、錫－銀－銅系、錫－銀－ビスマス系、錫-銀-銅-ビスマス系などが好ましい。 In the present embodiment, as shown in FIG. 3, both ends of the heater wire 12 and the nonconductive thread 14 are fixed to the first electrode 2A and the second electrode 2B by solder 16, respectively.
The first electrode 2A and the second electrode 2B are preliminarily cut into a rectangular shape having a predetermined width and length, and have a thickness of, for example, 0.01 to 0.5 mm, preferably 0.05 to 0.2 mm. Consists of The metal foil preferably has excellent conductivity and corrosion resistance, such as copper foil plated with tin, solder, gold, etc., or gold, silver, nickel, etc. having conductivity and corrosion resistance itself. The non-ferrous metal foil is preferably used. Further, as the solder, one having a high flux content, good high temperature characteristics and excellent wettability is preferable, and lead-free solder is preferable from the viewpoint of environmental protection. Specifically, a tin-silver-copper system, a tin-silver-bismuth system, a tin-silver-copper-bismuth system, and the like are preferable.
　なお、半田は一般に溶融温度が２００℃以上であり、この温度では、通常、非導電性糸１４は溶融して消失するか、または炭化して半田の濡れ性が喪失し、半田付けができなくなる。本実施形態においては、次のような方法を用いることにより、ヒータ線１２とともに、非導電性糸１４も各電極２Ａ、２Ｂに確実に固着している。 Note that the solder generally has a melting temperature of 200 ° C. or more. At this temperature, the non-conductive yarn 14 usually melts and disappears, or carbonizes and loses the wettability of the solder, and soldering becomes impossible. . In the present embodiment, by using the following method, the non-conductive yarn 14 as well as the heater wire 12 is securely fixed to the electrodes 2A and 2B.
　すなわち、図４に示すように、第１電極２Ａ（または第２電極２Ｂ）上に、網目状に編み込んだヒータ線１２と非導電性糸１４の端部を置き、その上に半田１６を重ね、半田ごてにより半田１６を溶融し、第１電極２Ａ（または第２電極２Ｂ）の略全面に薄く（例えば、５～３０μｍ厚）かつ一様に拡げる。その際、第１電極２Ａ（または第２電極２Ｂ）のヒータ本体部寄りの部分４２を幅Ａに亘って、冷風を吹き付ける、冷水を通したパイプを該部に当接する、または、熱伝導率が高くかつ放射に有利な金属治具を第１電極２Ａ（または第２電極２Ｂ）に接触させるなどの方法で冷却しながら行う。 That is, as shown in FIG. 4, the ends of the heater wire 12 and the non-conductive yarn 14 are placed on the first electrode 2A (or the second electrode 2B), and the solder 16 is overlaid thereon. Then, the solder 16 is melted by the soldering iron, and spreads thinly (eg, 5 to 30 μm thick) and uniformly over substantially the entire surface of the first electrode 2A (or the second electrode 2B). At that time, a portion of the first electrode 2A (or the second electrode 2B) near the heater main body 42 is blown over a width A over which cold air is blown, a pipe through which cold water passes is brought into contact with the portion, or thermal conductivity. This is performed while cooling by a method such as bringing a metal jig that is high and advantageous for radiation into contact with the first electrode 2A (or the second electrode 2B).
　このように第１電極２Ａ（または第２電極２Ｂ）のヒータ本体部寄りの部分４２を冷却しながら半田付けすることにより、冷却した部分４２に位置する非導電性糸１４の溶融消失、または炭化が防止され、第１電極２Ａ（または第２電極２Ｂ）上に溶融して固着（すなわち、溶融固着）される。具体的には、非導電性糸１４の端部が溶融し、溶融した部分が冷却固化して第１電極２Ａに固着される。冷却した部分４２の半田１６は、冷却を行わなかった部分に比べ温度が低いため、非導電性糸１４は溶融消失せずに固着し、機械的な接続強度としては十分な大きさが確保される。また、ヒータ線１２は、冷却を行わなかった部分の完全な半田１６によって確実に固定される。このため、図５に示すような、冷却を行わなかった場合に比べ、ヒータ本体部１と第１電極２Ａ（または第２電極２Ｂ）間の接続強度を大きく向上させることができる。 In this way, by melting and soldering the portion 42 of the first electrode 2A (or the second electrode 2B) near the heater body, the non-conductive yarn 14 located in the cooled portion 42 is melted or lost or carbonized. Is prevented and melted and fixed on the first electrode 2A (or the second electrode 2B) (that is, melted and fixed). Specifically, the end portion of the non-conductive yarn 14 is melted, and the melted portion is cooled and solidified to be fixed to the first electrode 2A. Since the temperature of the solder 16 of the cooled portion 42 is lower than that of the portion that has not been cooled, the nonconductive yarn 14 is fixed without melting and disappearing, and a sufficient mechanical connection strength is ensured. The Further, the heater wire 12 is securely fixed by the complete solder 16 in a portion where the cooling is not performed. For this reason, the connection strength between the heater body 1 and the first electrode 2A (or the second electrode 2B) can be greatly improved as compared to the case where cooling is not performed as shown in FIG.
　すなわち、図５は、冷却を全く行わずに半田付けした例を示している。この場合、ヒータ線１２は半田により第１電極２Ａ（または第２電極２Ｂ）に固定されているが、非導電性糸１４は溶融消失してしまい、第１電極２Ａ（または第２電極２Ｂ）に固定されていない。 That is, FIG. 5 shows an example of soldering without performing any cooling. In this case, the heater wire 12 is fixed to the first electrode 2A (or the second electrode 2B) with solder, but the non-conductive yarn 14 melts and disappears, and the first electrode 2A (or the second electrode 2B). Not fixed to.
　これに対し、第１電極２Ａ（または第２電極２Ｂ）のヒータ本体部寄りの部分４２を冷却しながら半田付けした図４の例では、冷却を行わなわなかった部分の非導電性糸１４は溶融消失してしまっているが、冷却した部分４２で、非導電性糸１４は第１電極２Ａ（または第２電極２Ｂ）に固着されている。さらに、ヒータ線１２は、図５の例と同様、半田により第１電極２Ａ（または第２電極２Ｂ）に固定されている。したがって、図５の例に比べてより高い強度でヒータ本体部１と第１電極２Ａ（または第２電極２Ｂ）が接続されている。 In contrast, in the example of FIG. 4 in which the portion 42 near the heater main body of the first electrode 2A (or the second electrode 2B) is soldered while being cooled, the non-conductive yarn 14 in the portion that has not been cooled is Although melted and disappeared, the non-conductive yarn 14 is fixed to the first electrode 2A (or the second electrode 2B) in the cooled portion 42. Furthermore, the heater wire 12 is fixed to the first electrode 2A (or the second electrode 2B) by soldering as in the example of FIG. Therefore, the heater body 1 and the first electrode 2A (or the second electrode 2B) are connected with higher strength than in the example of FIG.
　なお、冷却を行う部分４２の幅Ａは、第１電極２Ａ（または第２電極２Ｂ）の幅Ｗの１／５～４／５を用いることができる。第１電極２Ａ（または第２電極２Ｂ）の幅Ｗの１／５未満では、非導電性糸１４の接続強度が不十分となる。また４／５を超えると、通常の条件で行われる半田付け部分が少なくなって、ヒータ線１２の接続強度が低下し、ヒータ本体部１と第１電極２Ａ（または第２電極２Ｂ）２との接続強度も低下するおそれがあり、これを避けるため必要以上に幅を拡大した大きな電極が必要になってしまう。なお、電極の幅を抑制する観点からは、幅Ａは、第１電極２Ａ（または第２電極２Ｂ）の幅Ｗの１／４～１／３の範囲がより好ましい。 The width A of the portion 42 to be cooled can be 1/5 to 4/5 of the width W of the first electrode 2A (or the second electrode 2B). When the width is less than 1/5 of the width W of the first electrode 2A (or the second electrode 2B), the connection strength of the non-conductive yarn 14 becomes insufficient. On the other hand, if the ratio exceeds 4/5, the soldering portion performed under normal conditions decreases, the connection strength of the heater wire 12 decreases, and the heater body 1 and the first electrode 2A (or second electrode 2B) 2 In order to avoid this, a large electrode having a larger width than necessary is required. From the viewpoint of suppressing the width of the electrode, the width A is more preferably in the range of ¼ to ３ of the width W of the first electrode 2A (or the second electrode 2B).
　本発明においては、ヒータ本体部１と第１電極２Ａ（または第２電極２Ｂ）との接続強度をより信頼性の高いものにするため、図６（ａ）に示すように、絶縁性の保護テープ５で、ヒータ本体部１を接続した第１電極２Ａおよび第２電極２Ｂの表裏両面を保護するようにしてもよい。図６(ｂ)は、絶縁性の保護テープ５で挟み込んだ後の第１電極２Ａ（または第２電極２Ｂ）を示している。 In the present invention, in order to make the connection strength between the heater body 1 and the first electrode 2A (or the second electrode 2B) more reliable, as shown in FIG. The tape 5 may protect both the front and back surfaces of the first electrode 2A and the second electrode 2B to which the heater body 1 is connected. FIG. 6B shows the first electrode 2 </ b> A (or the second electrode 2 </ b> B) after being sandwiched between the insulating protective tapes 5.
　保護テープ５には、柔軟で、伸縮性に優れ、かつ耐熱性を有する、例えば、ポリエステル繊維、アラミド繊維などからなる不織布の使用が好ましい。難燃化処理が施された不織布からなるテープはより好ましい。不織布以外の保護テープの材料としては、例えば、ポリイミドテープ、フッ素樹脂テープ、塩化ビニルテープなどが挙げられる。保護テープ５を第１電極２Ａ（または第２電極２Ｂ）に接着する接着剤としては、難燃性、耐熱性などの観点から、シリコーン系、アクリル系、熱硬化性ゴム系などが好ましい。 For the protective tape 5, it is preferable to use a non-woven fabric made of, for example, polyester fiber or aramid fiber, which is flexible, excellent in elasticity, and heat resistant. A tape made of a nonwoven fabric that has been subjected to a flame retardant treatment is more preferred. Examples of the material for the protective tape other than the nonwoven fabric include a polyimide tape, a fluororesin tape, and a vinyl chloride tape. As an adhesive for adhering the protective tape 5 to the first electrode 2A (or the second electrode 2B), a silicone type, an acrylic type, a thermosetting rubber type, or the like is preferable from the viewpoints of flame retardancy and heat resistance.
　図７は、本実施形態のステアリングホイール用ヒータ１０を装着したステアリングホイール７０の一例を示した図である。
　図７に示すように、このステアリングホイール７０は、環状に形成された補強用の芯材の外周を合成樹脂で覆って構成されるリム部７１と、環状のリム部７１のほぼ中心位置に配置され、ステアリングシャフト７３に接続されるボス部７４と、リム部７１の内径側からボス部７４に向かって延びてリム部７１とボス部７４とを結合するスポーク部７５とから主に構成されている。 FIG. 7 is a view showing an example of a steering wheel 70 equipped with the steering wheel heater 10 of the present embodiment.
As shown in FIG. 7, the steering wheel 70 is arranged at a substantially central position of a rim portion 71 formed by covering the outer periphery of a reinforcing core member formed in an annular shape with a synthetic resin, and the annular rim portion 71. The boss part 74 connected to the steering shaft 73 and the spoke part 75 that extends from the inner diameter side of the rim part 71 toward the boss part 74 and connects the rim part 71 and the boss part 74 are mainly configured. Yes.
　本実施形態のステアリングホイール用ヒータ１０は、環状のリム部７１の全周を覆うとともに、第１電極２Ａおよび第２電極２Ｂが、リム部１の運転者が手の触れる確率の低い部分、例えば、自動車の進行方向が直進の場合に下位に位置するリム部１の部分で対向するように配置される。ステアリングホイール用ヒータ１０のリム部７１への固定は、両面粘着テープや接着剤によって行われる。第１電極２Ａおよび第２電極２Ｂに接続されたリード線３は、リム部７１の内径側の表面に沿って配線された後、スポーク部７５内に挿入され、リード線３に接続された接続端子（図示なし）が、電源端子(図示なし)に接続される。そして、このようにリム部７１に固定されたステアリングホイール用ヒータ１０は、さらに皮革などの表皮材７６で覆われる。 The steering wheel heater 10 of the present embodiment covers the entire circumference of the annular rim portion 71, and the first electrode 2A and the second electrode 2B have a low probability that the driver of the rim portion 1 touches the hand, for example, When the traveling direction of the automobile is straight, the rim portion 1 is positioned so as to face each other at the lower position. The steering wheel heater 10 is fixed to the rim 71 with a double-sided adhesive tape or an adhesive. The lead wire 3 connected to the first electrode 2 </ b> A and the second electrode 2 </ b> B is connected along the inner diameter side surface of the rim portion 71 and then inserted into the spoke portion 75 and connected to the lead wire 3. A terminal (not shown) is connected to a power supply terminal (not shown). The steering wheel heater 10 fixed to the rim portion 71 is further covered with a skin material 76 such as leather.
　このように構成されるステアリングホイール７０においては、例えば、電源端子からリード線３を介して第１電極２Ａに電源が供給されると、電流はヒータ本体部の複数のヒータ線から第１電極２Ａへと流れ、この通電によってヒータ線が発熱し、ステアリングホイール７０が暖められる。これにより、運転者は快適にステアリングホイール７０を操作することができる。 In the steering wheel 70 configured as described above, for example, when power is supplied from the power supply terminal to the first electrode 2A via the lead wire 3, the current is supplied from the plurality of heater wires of the heater body to the first electrode 2A. The heater wire generates heat by this energization, and the steering wheel 70 is warmed. As a result, the driver can comfortably operate the steering wheel 70.
　本実施形態のステアリングホイール用ヒータにおいては、ヒータ本体部が、複数の非導電性糸と、通電時に発熱する複数のヒータ線と、が網目状に編まれた構造を有し、かつヒータ本体部におけるヒータ線と非導電性糸との編込み本数比率が１：１～１：２の範囲になるように構成されているので、ヒータのステアリングホイールへの取り付け時などにおいて、瞬間的に過度の大きな力が加わった場合であってもヒータ線の断線の発生を抑制でき、またヒータ本体部の温度ムラの発生も抑制できる。
　また、ヒータ線が第１電極および第２電極に半田により固定され、非導電性糸が第１電極および第２電極に溶融固着しているので、ヒータ本体部と電極とを高い強度で接続することができる。
　また、入手しやすく、かつ安価な非導電性糸を使用することができるため、コストの低減を図ることができる。 In the steering wheel heater of the present embodiment, the heater main body has a structure in which a plurality of non-conductive yarns and a plurality of heater wires that generate heat when energized are knitted in a mesh shape, and the heater main body Since the ratio of the number of braids between the heater wire and the non-conductive yarn is in the range of 1: 1 to 1: 2, the heater wire is excessively instantaneously attached to the steering wheel. Even when a large force is applied, the occurrence of disconnection of the heater wire can be suppressed, and the occurrence of temperature unevenness in the heater body can also be suppressed.
Further, since the heater wire is fixed to the first electrode and the second electrode by solder and the non-conductive yarn is melted and fixed to the first electrode and the second electrode, the heater main body and the electrode are connected with high strength. be able to.
Moreover, since it is easy to obtain and an inexpensive nonelectroconductive thread | yarn can be used, cost reduction can be aimed at.
　以上、本発明の一実施形態について説明したが、本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化することができることはいうまでもない。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage. Needless to say.
　次に、本発明を実施例によりさらに詳細に説明するが、本発明はこれらの実施例に何ら限定されるものではない。 Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
（実施例１）
　線径０．０７５ｍｍの２ＵＥＷエナメル線（２種ポリウレタン銅線）１０本と、７５デニールのポリエステル糸２０本を、エナメル線（２種ポリウレタン銅線）１本、ポリエステル糸２本が交互になるように、メリヤス編みで編み込んで、長さ約１１００ｍｍ、幅約８０ｍｍの網目状の発熱体を作製した。次いで、この発熱体の長さ方向両端部に、錫めっき銅箔から作製した長さ８１ｍｍ×幅７ｍｍ×厚さ０．１ｍｍの電極を、半田（鉛フリー）を用いて、図４で説明した方法にしたがって取り付け、ヒータ本体部のエナメル線とポリエステル糸との編込み本数比率が１：２のステアリングホイール用ヒータを製造した。なお、半田付けの際、電極の発熱体側を幅１／３に亘って冷却した。なお、冷却は専用の冷却治具を作製し、これを用いて行った。また電極には、リード線も併せ固定した。 (Example 1)
10 2UEW enameled wires (type 2 polyurethane copper wire) with a wire diameter of 0.075 mm, 20 75 denier polyester yarns, 1 enameled wire (type 2 polyurethane copper wire), and 2 polyester yarns alternately Then, a net-like heating element having a length of about 1100 mm and a width of about 80 mm was produced by knitting with knitting. Next, an electrode having a length of 81 mm, a width of 7 mm, and a thickness of 0.1 mm made from a tin-plated copper foil was described with reference to FIG. 4 using solder (lead-free) at both ends in the length direction of the heating element. The steering wheel heater was manufactured according to the method, and the ratio of the number of braided enamel wires and polyester yarns in the heater main body was 1: 2. During soldering, the heating element side of the electrode was cooled over a width of 1/3. The cooling was performed using a special cooling jig. Moreover, the lead wire was also fixed to the electrode.
　得られたステアリングホイール用ヒータを観察したところ、ポリエステル糸の半田による溶断は見られず、２ＵＥＷエナメル線の全てが電極に固定され、ポリエステル糸も全て電極に溶融固着されていた。また、ステアリングホイール用ヒータに通電したところ、実用上問題となる温度ムラは認められなかった。 When the obtained heater for the steering wheel was observed, the polyester yarn was not melted by solder, and all of the 2UEW enameled wires were fixed to the electrode, and the polyester yarn was all melt-fixed to the electrode. In addition, when the heater for the steering wheel was energized, no temperature unevenness that was a practical problem was found.
（実施例２）
　２ＵＥＷエナメル線およびポリエステル糸の数をそれぞれ１５本とし、エナメル線と、ポリエステル糸が交互になるように、メリヤス編みで編み込んで、網目状の発熱体を作製した以外は、実施例１と同様にして、ヒータ本体部のエナメル線とポリエステル糸の体積比が１：１のステアリングホイール用ヒータを製造した。 (Example 2)
The same as in Example 1, except that the number of 2UEW enameled wires and the number of polyester yarns were 15 respectively, and the enameled wires and the polyester yarns were alternately knitted with knitting to produce a mesh-like heating element. Thus, a heater for a steering wheel in which the volume ratio of the enameled wire and the polyester yarn in the heater body was 1: 1 was manufactured.
　得られたステアリングホイール用ヒータを観察したところ、実施例１と同様、ポリエステル糸の半田による溶断は見られず、通電による、実用上問題となる温度ムラも認められなかった。 When the obtained heater for the steering wheel was observed, as in Example 1, the polyester yarn was not melted by soldering, and no temperature unevenness that was a practical problem due to energization was observed.
（比較例）
　２ＵＥＷエナメル線およびポリエステル糸の数をそれぞれ８本および２２本とし、これらを、幅方向にエナメル線１本、ポリエステル糸２本、エナメル線１本、ポリエステル糸３本が繰り返されるように、メリヤス編みで編み込んで、網目状の発熱体を作製した以外は、実施例１と同様にして、ヒータ本体部のエナメル線とポリエステル糸の体積比が２：５のステアリングホイール用ヒータを製造した。 (Comparative example)
The number of 2UEW enameled wires and polyester yarns is 8 and 22, respectively, and these are knit so that one enameled wire, two polyester yarns, one enameled wire and three polyester yarns are repeated in the width direction. A steering wheel heater was manufactured in the same manner as in Example 1 except that a net-like heating element was produced and a volume ratio of the enamel wire of the heater body to the polyester yarn was 2: 5.
　得られたステアリングホイール用ヒータを観察したところ、実施例１と同様、ポリエステル糸の半田による溶断は見られなかったが、通電では、実施例１および実施例２よりも多くの温度ムラが認められた。 When the obtained heater for the steering wheel was observed, as in Example 1, the polyester yarn was not melted by soldering. However, when energized, more temperature unevenness was observed than in Example 1 and Example 2. It was.
　１…ヒータ本体部、２Ａ…第１電極、２Ｂ…第２電極、３…リード線、４…接続端子、５…絶縁性保護テープ、１０…ステアリングホイール用ヒータ、１２…ヒータ線、１４…非導電性糸、１６…半田、７０…ステアリングホイール、７１…リム部。 DESCRIPTION OF SYMBOLS 1 ... Heater main-body part, 2A ... 1st electrode, 2B ... 2nd electrode, 3 ... Lead wire, 4 ... Connection terminal, 5 ... Insulating protective tape, 10 ... Steering wheel heater, 12 ... Heater wire, 14 ... Non Conductive thread, 16 ... solder, 70 ... steering wheel, 71 ... rim part.

Claims (5)

  1. 　ステアリングホイールのリム部に取り付けられるヒータであって、
    　ヒータ本体部と、前記ヒータ本体部の長手方向の一方の端部に接続した第１電極および他方の端部に接続した第２電極と、を備え、
    　前記ヒータ本体部は、複数の非導電性糸と、通電時に発熱する複数のヒータ線と、が網目状に編まれた構造を有し、前記ヒータ本体部における前記ヒータ線と前記非導電性糸との編込み本数比率が１：１～１：２の範囲であることを特徴とするステアリングホイール用ヒータ。     A heater attached to the rim of the steering wheel,
    A heater main body, and a first electrode connected to one end in the longitudinal direction of the heater main body and a second electrode connected to the other end,
    The heater body portion has a structure in which a plurality of non-conductive yarns and a plurality of heater wires that generate heat when energized are knitted in a mesh shape, and the heater wires and the non-conductive yarns in the heater body portion The steering wheel heater is characterized in that the ratio of the number of braids is 1: 1 to 1: 2.
  2. 　複数の前記ヒータ線は前記第１電極および前記第２電極に半田付けされており、複数の前記非導電性糸は前記第１電極および前記第２電極に溶融固着していることを特徴とする請求項１記載のステアリングホイール用ヒータ。 The plurality of heater wires are soldered to the first electrode and the second electrode, and the plurality of nonconductive yarns are fused and fixed to the first electrode and the second electrode. The heater for a steering wheel according to claim 1.
  3. 　複数の前記非導電性糸は、ポリエステル糸、レーヨン糸およびナイロン糸から選ばれる少なくとも1種を含むことを特徴とする請求項１または２記載のステアリングホイール用ヒータ。 3. The steering wheel heater according to claim 1 or 2, wherein the plurality of non-conductive yarns include at least one selected from polyester yarns, rayon yarns, and nylon yarns.
  4. 　請求項１乃至３のいずれか１項記載のステアリングホイール用ヒータを製造する方法であって、
    　（ａ）前記ヒータ本体部の複数の前記非導電性糸および複数の前記ヒータ線それぞれの一方の端部を第１電極上に配置し、他方の端部を第２電極上に配置する工程と、
    　（ｂ）前記第１電極および前記第２電極の前記ヒータ本体部寄りの部分を冷却しながら、複数の前記ヒータ線を前記第１電極および前記第２電極上に半田付けするとともに、複数の前記非導電性糸を前記第１電極および前記第２電極上に溶融固着する工程と
    　を含むことを特徴とするステアリングホイール用ヒータの製造方法。     A method for manufacturing a steering wheel heater according to any one of claims 1 to 3,
    (A) placing one end of each of the plurality of non-conductive yarns and the plurality of heater wires of the heater body on the first electrode, and placing the other end on the second electrode; ,
    (B) While cooling a portion of the first electrode and the second electrode near the heater main body, soldering the plurality of heater wires onto the first electrode and the second electrode, A method for manufacturing a steering wheel heater, comprising: fusing and fixing a non-conductive yarn on the first electrode and the second electrode.
  5. 　（ｂ）の工程における前記第１電極および前記第２電極に対する冷却は、前記第１電極および前記第２電極の前記ヒータ本体部側端縁から、前記第１電極および前記第２電極の各幅の１／５～４／５の部分に対し行われることを特徴とする請求項４に記載のステアリングホイール用ヒータの製造方法。 In the step (b), the first electrode and the second electrode are cooled from the heater body side edge of the first electrode and the second electrode, respectively, with the widths of the first electrode and the second electrode. 5. The method for manufacturing a steering wheel heater according to claim 4, wherein the method is performed for a portion of 1/5 to 4/5.
PCT/JP2015/004942 2014-09-30 2015-09-29 Steering wheel heater and production method therefor WO2016051772A1 (en)

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JP7223495B2 (en) * 2017-11-14 2023-02-16 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社 heater and steering wheel
CN112640573B (en) * 2018-08-29 2023-05-02 琳得科株式会社 Sheet heating element and heating device
CN112602376B (en) * 2018-08-29 2023-04-07 琳得科株式会社 Sheet-like conductive member

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US11072358B2 (en) * 2018-02-06 2021-07-27 Nihon Plast Co., Ltd. Steering wheel covering member, steering wheel, and method for manufacturing steering wheel

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