JP5896724B2 - Method and apparatus for manufacturing a handle - Google Patents

Description

  The present invention relates to a method for manufacturing a handle and a manufacturing apparatus therefor, which manufactures a handle provided in a grip portion that grips a heater wire that generates heat when energized.

  Conventionally, when starting and driving an automobile, which is a vehicle parked outdoors in winter, a heater device is installed on the steering wheel in order to reduce the difficulty of operation and discomfort caused by the cold steering wheel, that is, the steering wheel. There is a known construction that improves the comfort by warming the steering wheel even when various engines are not warmed up soon after being installed and started.

  As such a configuration, for example, a configuration is known in which a heater device in which a heater wire is sandwiched between two sheets is mounted on the surface of a steering wheel and the outside is covered with an epidermis (for example, Patent Document 1). reference.).

  However, such a heater device is not easily pasted on the curved surface of the steering wheel. That is, since this heater device is a flat body, when it is attached to the surface of an annular rim, the center portion is extended and the peripheral edge portion is staggered, causing wrinkles. Such wrinkles appear as irregularities on the epidermis and it is not easy to obtain a good appearance. In addition, since the heater wire is incorporated between the sheets, the heater device is difficult to obtain flexibility, and it is not easy to freely insert a cut or the like to follow the surface of the rim.

  Furthermore, a carrier such as a sheet that holds the heater wire in a predetermined shape has a shielding effect on the non-electric heating side, but the shielding action on the heating side (heating side) hinders improvement in heating performance. There is a fear. On the other hand, exposing the heater device to the surface of the steering wheel is not preferable in design. Therefore, although the design of the appearance is improved by using the epidermis, such an epidermis can inhibit the transmission of heat. As described above, in the above configuration, it is not easy to obtain sufficient heating performance, and a skin body such as synthetic leather or natural leather is required, so that material costs and attachment costs are required.

  Further, in the above configuration, the heater device is disposed at each of the left and right portions of the steering wheel (at 9 o'clock and 3 o'clock positions of the analog timepiece in front view). If the car only runs on a straight road, the driver will grip almost both sides of the steering wheel, but the steering wheel will not necessarily take into account the assumed driving operation, for example, the car goes out from the parking lot to the road after starting. In such a case, it is not easy to sufficiently warm the driver's hand with the heater device at one place on the left and right. Therefore, although it is considered preferable to incorporate the heater device over the entire circumference of the rim portion, when the heater device as described above is attached to the entire circumference of the rim portion, the problem of appearance and cost is further increased. .

  Moreover, the structure which formed the heater apparatus which braided the heater wire in the grid | lattice form in the annular | circular shape, and was wound around the outer periphery of the rim | limb part is known (for example, refer patent document 2). In the case of this configuration, the heater device can be arranged on the entire circumference of the rim portion, and the problem of unevenness appearing on the surface can be solved by making the heater wire thinner.

  However, even in the case of such a configuration, it is not possible to design the heater wire knitted body to be exposed to the rim portion, and it is necessary to cover the heater device and wrap the skin body. Therefore, even with such a configuration, the specification of the presence or absence of an epidermis cannot be arbitrarily created.

  In addition, in this configuration, there is a limit on the thickness of the heater wire to be adapted. For example, in the case of a fine wire having a wire diameter of about 0.05 to 0.1 mm, unevenness that is visually recognized on the epidermis is less likely to occur. In the case of a heater wire having a wire diameter exceeding the range, for example, a wire diameter of 0.5 mm or more, unevenness occurs in the epidermis. Therefore, in consideration of design, a thin heater wire must be used. In this case, for example, if the knitted body is pasted on the back side of the skin, the risk of disconnection of the heater wire is greatly reduced in the handling of subsequent processes, etc. Therefore, workability is not good.

  Further, the attachment of the knitted body to the rim portion is generally not suitable for automation, and requires an operation cost to prepare a knitted body attached to the skin. In addition, although a configuration in which synthetic resin such as polyurethane is insert-molded instead of the skin body is also conceivable, in this case, an operation of attaching the knitted body to the steering wheel base is required. Furthermore, although it may be possible to reduce the disconnection during work by attaching the knitted body to the stretchable carrier, a process of knitting the heater wire, a step of attaching the knitted body knitted with the heater wire to the carrier, etc. are separately required. The man-hour for handling the wire is accompanied by cost and risk of defects.

Japanese Patent Laid-Open No. 61-81272 (Page 2, FIGS. 1-5) JP 2002-96739 A (page 3-7, FIG. 1-5)

  In recent years, as part of efforts to protect the global environment and suppress the generation of greenhouse gases, electric vehicles (EV), which have a lower environmental impact than gasoline engine vehicles, have attracted attention.

  For example, a hybrid vehicle (HEV) that can generate electricity using an installed engine can generate electricity using appropriate engine power, and its exhaust heat can also be used for heating, etc. It is composed of a combination of a storage battery and a motor, and basically has to be replenished with energy from an external charger, and it is recognized that the cruising distance will be shortened if electric power is used for heating.

  Therefore, although it takes a lot of energy to raise the atmospheric temperature in the passenger compartment in winter, if the vehicle is warmed by the steering wheel that is directly touched by the driver, it is possible to feel the warmth even if the atmospheric temperature is suppressed. For this reason, it is considered to obtain a driver's comfort by attaching a heater device to the steering wheel.

  Therefore, in adopting a steering wheel equipped with a heater device for an electric vehicle, it is not easy to provide and disseminate an inexpensive electric vehicle unless there is an option other than a method of manufacturing by a handicraft operation. Therefore, it is desired that such a steering wheel can be manufactured while suppressing mass production costs.

  This invention is made in view of such a point, and it aims at providing the manufacturing method of the handle | steering-wheel which can attach a heater wire easily at low cost, and its manufacturing apparatus.

The method of manufacturing a handle according to claim 1 is a method of manufacturing a handle having a heater wire between an inner covering portion and an outer covering portion of a rim portion connected to a boss portion via a spoke portion, and comprising a cushion The heater wires are alternately hooked between a plurality of holding members sequentially arranged in a zigzag manner across a virtual line set on the upper surface of the body, and the heater wire crosses the virtual line on the upper surface of the cushion body. and subjected turning placing in a zigzag shape which, on both sides of the inner cover portion of the outer surface of the press with the said inner covering part said imaginary line by buried in the cushion body and a portion between the zigzag heater wire in which said heater wire is located to and a winding can included the step of Ru is deformed to engulf along the outer surface of the inner cover portion.

The handle manufacturing apparatus according to claim 2 is a handle manufacturing apparatus for manufacturing a handle having a heater wire between an inner covering portion and an outer covering portion of a rim portion connected to a boss portion through a spoke portion. there are a cushion body, and a plurality of retaining members which are sequentially arranged in a zigzag pattern across the imaginary line which is set on the upper surface of the cushion body, the heater wire, the holding member at the upper surface of the cushion body said inner cover by pushing the means for arranging the hook alternating zigzag crossing the imaginary line on the upper surface of the cushion body, the portion with the zigzag heater wire of the outer surface of the front Symbol inner cover portion Monodea that the heater wire has and means for deforming to engulf along the outer surface of the inner coating portion part is buried in the cushion body positioned on both sides of the imaginary line in .

A handle manufacturing apparatus according to a third aspect is the handle manufacturing apparatus according to the second aspect, wherein each holding member is movable between two positions away from the virtual line on both sides thereof .

Apparatus for manufacturing a steering wheel according to claim 4, wherein, in the apparatus for manufacturing a steering wheel according to claim 2, the inner portions positioned on both sides of the imaginary line of the heater wire by eccentric rotation with respect to the inner side covering portion A rotating body that is pressed along the outer surface of the covering portion is provided.

The manufacturing apparatus according to claim 5, wherein the handle, in the manufacturing apparatus of claims 2 to 4 of any one described handle, the inner cover portion, a portion even without least is provided in a circular arc shape, a circle of the inner cover portion A rotary device that rotates around the center of the arc-shaped portion as a rotation axis , and the cushion body presses the heater wire hooked in a zigzag manner on the holding member along the outer surface of the inner covering portion rotated by the rotary device. is there.

According to the production method of a handle according to claim 1, of the cushion body by hooking the heater wire alternately imaginary line which is set on the upper surface of the cushion body between a plurality of retaining members which are sequentially arranged in pressed Nde zigzag A heater wire is arranged on the upper surface in a zigzag shape intersecting the virtual line, and the inner cover portion is buried in the cushion body by pressing a part of the outer surface of the inner cover portion of the rim portion and the zigzag heater wire . By deforming the heater wires located on both sides of the wire so as to be wound along the outer surface of the inner covering portion, the heater wires can be easily attached at low cost without having a complicated configuration and process.

According to the manufacturing apparatus of a handle according to claim 2, the cushion body by hooking the heater wire Alternating between sequentially arrayed plurality of holding members in a zigzag shape across the imaginary line which is set on the upper surface of the cushion body top surface is arranged a heater wire in a zigzag shape that intersects the imaginary line, buried inside the coating portion to the cushion member by pressing and with the part and the zigzag heater wire of the outer surface of the inner cover portion of the Trim portion Since the heater wires located on both sides of the virtual wire are deformed so as to be wound around the outer surface of the inner covering portion, the heater wires can be easily attached at low cost without having a complicated configuration and process. it can.

According to the handle manufacturing apparatus of claim 3, in addition to the effect of the handle manufacturing apparatus of claim 2, each holding member can be moved between two positions away from the virtual line on both sides thereof. By doing so, the heater wire can be hooked in a zigzag shape more easily with respect to the holding member.

According to the handle manufacturing apparatus of the fourth aspect, in addition to the effect of the handle manufacturing apparatus of the second or third aspect, the rotating body eccentrically rotated with respect to the inner covering portion is provided on both sides of the virtual line of the heater wire. By pressing the positioned portion against the inner covering portion, the heater wire can be reliably wound by the inner covering portion with a simple configuration.

According to the manufacturing apparatus of a handle according to claim 5, in addition to claims 2 to 4 Effect of the handle of the manufacturing apparatus of any one described, this by rotary device an inner coating portion in which the part with the arcuate even without least By rotating the center of the arc-shaped part around the rotation axis and pressing the heater wire wound around the holding member along the outer surface of the inner covering portion by the cushion body, the heater wire can be placed inside by a simpler and space-saving configuration. It can be wound around the covering part.

It is sectional drawing which shows the pressing process and winding-in process of 1st Embodiment of the manufacturing method of the handle | steering_wheel of this invention in order of (a) and (b). It is a top view which shows the winding process of the manufacturing method of a handle same as the above in order of (a) and (b). It is sectional drawing which shows the winding process of the manufacturing method of a handle same as the above in order of (a) and (b). The holding member of the manufacturing apparatus of a handle | steering_wheel is shown, (a) is a top view which shows the state which latched the heater wire, (b) is a side view of (a). The holding member same as the above is shown, (a) is a plan view showing a state in which the heater wire is unlocked, and (b) is a side view of (a). The manufacturing method of the handle manufacturing method and the handle manufactured by the manufacturing apparatus are shown, (a) is a front view of a part of the handle, and (b) is an enlarged view showing a part of the handle gripping part. (C) is sectional drawing of the II equivalent position of (a). It is a side view which shows 2nd Embodiment of the holding member of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a side view which shows 3rd Embodiment of the holding member of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a top view which shows a part of 4th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a top view which shows a part of 5th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a side view which shows the holding member of 6th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a side view which shows 7th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is sectional drawing which shows a part of the pressing process of the manufacturing method of a handle | steering wheel, and a winding process. It is sectional drawing which shows a part of 8th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is sectional drawing which shows a part of 9th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a perspective view which shows a part of 10th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. The winding process of the manufacturing method of a handle | steering_wheel is shown, (a) is the sectional drawing, (b) is the top view. It is a top view which shows 11th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention, (a) And (b) shows a part of winding process of the manufacturing method of a handle | steering_wheel. It is a perspective view which shows a part of 12th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is sectional drawing which shows a part of manufacturing apparatus of a handle same as the above. It is a side view which shows typically a part of winding process of the manufacturing method of the handle of the manufacturing apparatus of a handle same as the above in order of (a) and (b). It is a top view which shows the state which formed the 1st surface with the manufacturing apparatus of the handle same as the above. It is sectional drawing which shows a part of entrainment process of the manufacturing method of a handle same as the above in order of (a) and (b). It is a perspective view which shows a part of 13th Embodiment of the manufacturing apparatus of the handle | steering_wheel of this invention. It is a top view which shows the winding process of the manufacturing method of a handle same as the above. It is a side view which shows the winding-in process of the manufacturing method of a handle same as the above.

  Hereinafter, a first embodiment of a handle manufacturing method and a manufacturing apparatus thereof according to the present invention will be described with reference to the drawings.

  6 (a) to 6 (c), reference numeral 10 denotes a steering wheel which is a steering wheel of an automobile as a vehicle, for example. The steering wheel 10 includes a steering wheel main body 11 which is a steering wheel main body and an occupant of the steering wheel main body 11. An airbag device (airbag module) which is a center pad as a pad body (not shown) mounted on the side, a switch module (not shown), and the like are provided. The steering wheel 10 is normally mounted on a steering shaft provided in the vehicle in an inclined state. Hereinafter, the passenger side of the airbag device, that is, the front side is the upper side, and the steering shaft side, that is, the rear side is the lower side. The front side of the vehicle, that is, the windshield side above the front side will be described as the front side, and the rear side of the vehicle, that is, the lower side of the rear side will be described as the rear side or the front side.

  The steering wheel main body 11 is connected to the rim portion (ring portion) 15 as an annular gripping portion, the boss portion 16 located inside the rim portion 15, and the rim portion 15 and the boss portion 16. A plurality of spoke portions 17 are formed in the present embodiment. In addition, a substantially cylindrical boss 18 having a serration structure that meshes with the steering shaft is provided at a lower portion on the vehicle body side of the boss portion 16, and a core body also called a hub core is formed on the boss 18 The boss plate 19 is integrally fixed by molding, for example, a magnesium alloy by a gravity casting method, an injection molding method, or the like. Further, a resin lower cover (not shown) called a back cover or a body cover is attached to the boss portion 16 to cover the lower side portion of the boss portion 16. Then, the metal core 17a of the spoke portion 17 is integrally extended from the boss plate 19 or fixed by welding or the like. Further, the core metal 15a of the rim part 15 is fixed to the core metal 17a of the spoke part 17 by welding or the like.

  Further, on the surface side of the entire circumference of the core metal 15a of the rim part 15 and the surface side of the spoke part 17 on the rim part 15 side of the core metal 17a, there are planned gripping parts made of soft synthetic resin or the like. An inner covering portion 20 that is the core covering portion is formed. A groove portion 21 is provided on the surface of the inner covering portion 20, and a heater wire 22 that generates heat when energized is disposed along the groove portion 21. Further, the inner covering portion 20 and the heater wire 22 are covered with an outer covering portion 23 that is a thin top covering portion.

  In the present embodiment, for example, a soft foamed polyurethane resin that is finely foamed is used as the inner covering portion 20, but it may be formed of a soft foamed polyethylene block body or the like. That is, the inner covering portion 20 can be a block body having the shape of the inner covering portion 20 by being divided into an inner peripheral side and an outer peripheral side or upper and lower sides and combined with each other. Further, as the inner covering portion 20, foamed polystyrene or the like can be used in place of the foamed polyethylene. In this case, a resin material (for example, a reaction for polyurethane molding) constituting the outer covering portion 23 that is molded and integrated in a later process. It is preferable to form a thin film that protects the surface so as not to be attacked by a liquid or the like.

  Further, the groove portion 21 of the inner covering portion 20 is U-shaped (V-shaped) on the front side of the inner covering portion 20, and is continuous with each other on the back side of the inner covering portion 20, for example, 0.3 mm Has a depth of about.

  The heater wire 22 is provided with an insulating film on the surface of the core wire that generates heat when energized. In the present embodiment, for example, the wire diameter (diameter) is set to about 0.5 mm. In other words, the heater wire 22 has a wire diameter that slightly protrudes from the groove 21. The heater wire 22 is connected to a control circuit (not shown) and is configured to generate heat when energized by the control circuit.

  Further, the outer covering portion 23 is insert-molded (overmolded) on the surface of the inner covering portion 20 so that the heater wire 22 is buried. As the material of the outer covering portion 23, in the present embodiment, for example, a material obtained by finely foaming a soft polyurethane resin (low yellowing type or non-yellowing type polyurethane) that is not discolored by ultraviolet rays or the like can be used. . For example, the outer covering portion 23 inserts a base body (inner covering portion 20) in a state where the heater wires 22 are arranged into a molding die (not shown), and reacts the reaction mixture liquid which becomes polyurethane into a molding die (RIM type). It is molded by being injected into the mold and foamed in a mold, and is formed to a thickness of about 1.0 to 2.0 mm, for example. That is, the outer covering portion 23 is formed slightly thicker than the wire diameter of the heater wire 22. Therefore, the steering wheel 10 is a polyurethane steering wheel that has good surface temperature rise and tactile sensation, and that the heater wire 22 is not incorporated from the appearance (it is difficult to understand). In addition, when the above-described polyurethane resin is not used as the material of the outer covering portion 23, a concealing coating (barrier coat) is applied to the surface of the outer covering portion 23 as a measure for preventing discoloration over time. This concealing coating may be performed by spraying (after-coating) after taking out from the mold, or spraying concealing paint on the surface of the mold including the periphery of the molded product cavity. You may use the in-mold coating method etc. which are made to invert and adhere to the surface of a molded article.

  The airbag device also includes a bag-shaped airbag, a resin cover that covers the folded airbag, an inflator that injects gas, and the like. The airbag is rapidly inflated, folded and stored in an air bag, the cover body is rapidly inflated, the air bag is inflated and deployed on the front side of the occupant, and the occupant is protected. The airbag device may be integrated with a horn switch mechanism as a switch device.

  Next, the manufacturing apparatus 31 for the steering wheel 10 will be described.

  The manufacturing apparatus 31 shown in FIGS. 1 to 5 includes a heater wire 22 on an intermediate body 32 in which an inner covering portion 20 is formed on a core metal 15a integrated with a boss portion 16 by a core metal 17a of a spoke portion 17. And a drum 33 as a heater wire winding portion around which the heater wire 22 is wound, and a winding device 34 for winding the heater wire 22 around the intermediate body 32.

  The drum 33 is rotatably disposed at a position on the side of the winding device 34, and is configured such that the drawn heater wire 22 is sequentially supplied to the winding device 34.

  The winding device 34 includes a base plate 35 as a base body, a hook pin 36 as a holding member movably provided on the base plate 35, and a pedestal as a cushion body provided on the base plate 35. Part 37.

  The base plate 35 is formed in a flat plate shape by a hard member.

  The hook pin 36 has a lower end protruding below the base plate 35 and connected to a driving device 40 having a moving mechanism and a rotation mechanism, and an upper end protruding above the pedestal 37. In addition, a pair of protrusions 41, 41 protrude from the upper end of the hook pin 36 at positions spaced apart from each other, and the heater wire 22 is engaged between the protrusions 41, 41. It is a locking recess 42 that holds and holds. The hook pin 36 is provided with one and the other pins 36a and 36b arranged at positions corresponding to the grooves 21 of the intermediate body 32. These one and other pins 36a, 36b are positioned by the drive device 40 so as to be at an interval substantially equal to the wire diameter of the heater wire 22 along the virtual circle PC which is a predetermined line. The first pin 36b is located outside the virtual circle PC, the first pin 36a is located outside the virtual circle PC, and the other pin 36b is located inside the virtual circle PC. On the other hand, it can move to two positions, the second position having a zigzag shape, and can rotate around each central axis. Therefore, the heater wire 22 can be arranged along the virtual circle PC between the one and the other pins 36a and 36b.

  The pedestal portion 37 constitutes at least a part of the pressing device 44 that presses the heater wire 22 wound around the hook pin 36 against the inner covering portion 20, and is, for example, a foamed polyurethane block. A soft material that can be deformed by hand pressing or the like is selected so as to be used as a cushioning material. The pedestal portion 37 has a rectangular shape larger than the intermediate body 32 in plan view. In addition, a concave portion 45 having a circular shape in plan view capable of receiving the intermediate body 32 is provided at the center of the pedestal portion 37. A concave groove portion 46 having a circular shape in plan view as a cut-out portion is provided in the central portion of the concave portion 45, and a guide shaft as a guide portion serving as the center of the virtual circle PC along the center of the concave groove portion 46. 47 projects from the base plate 35. That is, the guide shaft 47 is located at the center of the pedestal portion 37 (base plate 35). Further, the pedestal portion 37 is provided with a guide groove 48 for guiding one of the hook pins 36 and the other pin 36a, 36b. These guide grooves 48 intersect (orthogonally) the virtual circle PC and are radially formed with respect to the guide shaft 47, that is, in a slit shape (long hole shape) having a predetermined length along the radial direction of the virtual circle PC. And arranged at substantially equal intervals in the circumferential direction of the virtual circle PC. These guide grooves 48 are provided over the entire circumference of the virtual circle PC, but only a part of them is shown in FIG. 2 for clarity of explanation.

  The guide shaft 47 is a rod having a circular constant cross section, and is inserted into the boss 18 so that the intermediate body 32 can be freely moved up and down, and the intermediate body 32 can be positioned with respect to the virtual circle PC. .

  Further, the guide groove 48 guides the hook pin 36 movably along the radial direction of the virtual circle PC (along the direction intersecting (orthogonal) with the virtual circle PC).

  When winding the heater wire 22 around the intermediate body 32, first, as shown in FIGS. 2 (a) and 3 (a), the tip end side of the heater wire 22 is pulled out from the drum 33, and a clamp C or the like. After being pinched and fixed, the first and second pins 36a and 36b located at the first position along the virtual circle PC are passed through and arranged in a circle along the virtual circle PC (heater line arranging step). At this time, the one and the other pins 36a and 36b are in a state in which the locking recess 42 faces the virtual circle PC side (FIGS. 4A and 4B).

  Next, as shown in FIGS. 2B and 3B, the one and the other pins 36a and 36b are sequentially moved from the position close to the tip end side of the heater wire 22 to the adjacent one in the clockwise direction. It moves to the 2nd position with the drive device 40 along the guide groove 48 (moving process). That is, in the present embodiment, the driving device 40 moves the other pin 36b closest to the tip end side of the heater wire 22 to the outside across the virtual circle PC, and then with respect to the other pin 36b. One pin 36a that is adjacent in the clockwise direction is moved inward across the virtual circle PC, and the other pin 36b that is adjacent to the one pin 36a in the clockwise direction is moved to the virtual circle PC. The heater wire 22 is held in the holding recesses 42 of the one and the other pins 36a and 36b by repeating over the entire circumference of the virtual circle PC. The zigzag curve is arranged with respect to the virtual circle PC. At this time, since one and the other pins 36a and 36b sequentially move from the front end side of the heater wire 22, the heater wire 22 is gradually pulled out from the drum 33 as the required length increases from the front end side. Supplied. Before the one and the other pins 36a, 36b move from the first position to the second position, there is only a simple arc-shaped heater wire 22 guided between the one and the other pins 36a, 36b. Therefore, the heater wire 22 is pulled out from the drum 33 with almost no resistance and shaped in a zigzag shape, and the heater wire 22 is not subjected to stress such as local pulling or bending. The defect does not occur.

  In this way, the heater wire 22 having a predetermined width is prepared inside and outside the virtual circle PC with the virtual circle PC as the center, and the planar first surface S1 is configured by the zigzag heater wire 22. Is carried out (a wrapping process).

  Next, as shown in FIGS. 1A and 1B, the boss 18 of the intermediate body 32 is inserted into the guide shaft 47, and a part of the outer surface of the inner covering portion 20, for example, the back side is covered with the heater wire 22. After being pressed down to a position in contact with the first surface S1 (pressing process), the heater wire 22 is further pressed down into the recess 45 to align the inner covering portion 20 of the intermediate body 32 with the virtual circle PC. At the same time, it is pressed against the pedestal 37 and buried. As a result, the pedestal portion 37 is elastically deformed, and the heater wire 22 disposed on the surface thereof extends along the outer surface of the inner covering portion 20 from the back side of the inner covering portion 20 to the front side (occupant side). It is pressed so as to be deformed into a curved surface (rolling step). That is, the first surface S1 formed by the heater wire 22 is deformed by the inner covering portion 20 being pushed down beyond the first surface S1, and the zigzag shape of the heater wire 22 is formed along the outer surface of the inner covering portion 20. Is curved and deformed. In other words, when the inner covering portion 20 of the intermediate body 32 is pressed beyond the first surface S1, the heater wire 22 is deformed so as to be wound from the side surface to the front side along the outer surface of the inner covering portion 20. Then, a curved second surface S2 is formed, and this second surface S2 wraps a part of the outer surface of the inner covering portion 20 (the portion corresponding to the groove portion 21) from the back side to the front side.

  At this time, as shown in FIGS. 5A and 5B, the drive device 40 rotates the one and other pins 36a and 36b by 180 ° to change the heater wire 22 from the holding state. When the state is shifted to the non-holding state, the one and the other pins 36a and 36b are arranged in advance in accordance with the groove portion 21 of the inner covering portion 20 shown in FIG. Be guided to. For example, the heater wire 22 may be pressed against the inner covering portion 20 by the pedestal portion 37 while slightly vibrating the intermediate body 32 (FIG. 1) in the circumferential direction (in the circumferential direction of the virtual circle PC). The heater wire 22 is more easily guided into the groove portion 21.

  In this way, the heater wire 22 is attached to the groove portion 21 on the outer surface of the inner covering portion 20 of the intermediate body 32 (FIG. 1).

  Further, the intermediate body 32 (FIG. 1) to which the heater wire 22 is attached is inserted into a mold, and the heater wire 22 and the inner covering portion 20 are collectively covered with an outer covering portion 23 as shown in FIG. At this time, the outer covering portion 23 may have an appearance like a leather-attached steering wheel by, for example, forming a leather-like gavel or a stitch-like shape resembling the sewing of the inner periphery.

  Next, gates, overflow portions, flashes, and the like that are formed when the outer covering portion 23 is formed are appropriately removed, and a connector or the like is attached to the end of the heater wire 22.

  Then, by attaching an air bag device, back cover, switch module, and finisher such as a woodgrain or metallic tone, the heater wire 22 is completely hidden and the heater wire 22 is built in at first glance. The steering wheel 10 having an appearance that cannot be distinguished is completed.

  As described above, in the present embodiment, the heater wire 22 is zigzag-shaped between the plurality of hook pins 36 (one and the other pins 36a, 36b) arranged in a predetermined position so as to form a planar first surface. S1 is formed, and a part of the outer surface of the inner covering portion 20 that becomes the rim portion 15 is pressed against the first surface S1, and the first surface S1 is pressed along the inner covering portion 20 to the outer surface of the inner covering portion 20. The inner covering portion 20 is deformed by being pressed by the pedestal portion 37 so as to be wound from the outer side surface of the inner covering portion 20 continuous with a part of the inner covering portion 20 to the other portion (front side). A curved second surface S2 is formed that wraps a part of the outer surface (portion corresponding to the groove 21). For this reason, the heater wire 22 can be easily attached at low cost without having a complicated configuration and process. That is, this manufacturing method can be automated and mechanized, and is excellent in mass productivity of the steering wheel 10. Further, the manufacturing apparatus 31 includes a plurality of hook pins 36 arranged at predetermined positions and the heater wires 22 wound around the hook pins 36 along the outer surface of the inner covering portion 20 that becomes the rim portion 15 by elastic deformation. The pressing device 44 (the pedestal portion 37) and the like that can be pressed can be implemented simply by performing a simple operation, so that it is not a large-scale device, and cost reduction can be realized, such as not requiring expensive equipment costs.

  Further, in the pressing step, a part of the outer surface of the inner covering portion 20 is pressed so as to exceed the first surface S1, so that the outer surface of the inner covering portion 20 is formed by the heater wire 22 forming the first surface S1. The second surface S2 that wraps a part (the part corresponding to the groove 21) can be formed more easily.

  Furthermore, by making the first surface S1 planar, the first surface S1 can be easily formed by the heater wire 22, and by making the second surface S2 curved, a curved surface (circular shape). Thus, the heater wire 22 can be surely placed along the inner covering portion 20 having the cross section.

  The hook pin 36 (one and the other pins 36a and 36b) has two positions, a first position located along the virtual circle PC and a second position located in a zigzag manner with respect to the virtual circle PC. By making it possible to move to a position, the hook pin 36 (one and the other pins 36a, 36b) can be moved from the first position to the second position simply by arranging the heater wire 22 along the virtual circle PC. As a result, the heater wire 22 is shaped so as to form the first surface S1, so that the heater wire 22 can be more easily hung around the hook pin 36 (one and the other pins 36a, 36b). In addition, the heater wire 22 is not easily broken.

  Then, the pedestal portion 37 embeds the inner covering portion 20 and elastically deforms it to press the heater wire 22 along the outer surface of the inner covering portion 20, thereby making the heater wire 22 with a simple configuration the inner covering portion. Can be more easily rolled along 20 outer surfaces.

  Further, the outer covering portion 23 is formed on the outer surface of the inner covering portion 20 around which the heater wire 22 is wound so as to be slightly thicker than the wire diameter of the heater wire 22, so that the occupant grips the rim portion 15 and steers A good warm feeling can be obtained when the wheel 10 is operated, and since the heater wire 22 is concealed by the outer covering portion 23, it is essential to attach a skin body such as leather to the rim portion 15. Therefore, the manual work for attaching the epidermis is not necessary, and the manufacturing cost can be further reduced.

  Therefore, by mounting this steering wheel 10 on an automobile or the like, a cheaper automobile can be provided. In particular, by mounting this steering wheel 10 on an electric vehicle, the power of the storage battery allocated for heating can be suppressed, so that the power of the storage battery can be used effectively and the cruising distance can be prevented from being shortened. Therefore, since an electric vehicle with better usability can be provided, it is possible to contribute to the popularization of electric vehicles, the reduction of greenhouse gas emissions associated therewith, the preservation of the global environment, and the like.

  The first embodiment can be applied to the heater wire 22 having a wire diameter of about 0.2 mm, for example, but a thicker heater wire 22 having a wire diameter of about 0.5 mm, for example. Is used, there is no fear of disconnection or the like even if the winding device 34 is operated at a higher speed. In other words, by moving all the hook pins 36 at the same time, or by sequentially moving the next hook pins 36 during the operation of the hook pin 36 that first moved, it becomes a narrow zigzag along the virtual circle PC. If the zigzag shape as the final shape is obtained by successively making the wave shape larger, the shaping time of the heater wire 22 can be greatly shortened, and the productivity is further improved.

  That is, the operating speed of the winding device 34 shown in FIG. 2 and the timing of the movement of the hook pin 36 are the specifications of the heater wire 22 and the size of the area of the inner covering portion 20 covered by the heater wire 22 (wide, narrow). ) Can be selected as appropriate.

  Further, as in the second embodiment shown in FIG. 7, the hook pin 36 may be one whose tip side is curved in an arc shape. In this case, when the heater wire 22 is wound, the position (release point) where the hook pin 36 releases the heater wire 22 can be moved above the inner covering portion 20 by the rotation of the hook pin 36, and the heater wire 22 is moved into the groove portion. It can be more securely and easily attached to 21.

  Further, as in the third embodiment shown in FIG. 8, the hook pin 36 may be constituted by half pins 51 and 51 as divided holding members divided by a surface along the longitudinal direction (axial direction). In this case, it is possible to change the shape of the heater wire 22 by moving the half pins 51 and 51 apart from each other. For example, the heater wire 22 can be shaped to be wider and substantially U-shaped. It can be set as the state curved to the shape.

  Then, as in the fourth embodiment shown in FIG. 9, the hook pin 36 is not moved, but is previously arranged at a predetermined zigzag position with respect to the virtual circle PC, and the heater wire 22 is, for example, a 6-axis robot. The first surface S1 may be formed by arranging in a bellows shape (zigzag shape) using a wiring device such as the above. In this case, although not shown, for example, an annular guide may be disposed at the tip of a wiring device such as a 6-axis robot, and the heater wire 22 may be hung around the hook pin 36 through the guide. preferable. Further, the hook pin 36 is preferably made of resin, for example, a slippery material or a surface treatment in order to reduce stress when the heater wire 22 is wound around. Further, although not shown in the drawings, the hook 37 is not tilted when the heater wire 22 is wound along the surface of the inner covering portion 20, instead of the guide groove 48, on the base 37 on the base end side of the hook pins 36. Thus, it is preferable to form a slit.

  Further, in the fourth embodiment, as in the fifth embodiment shown in FIG. 10, the hook pin 36 is paired with the inner side and the outer side of the virtual circle PC, and the entire circumference of the virtual circle PC is formed. If arranged, the two heater wires 22 and 22 can be closely routed to the rim portion 15, and the steering wheel 10 can be warmed more reliably and finely.

  Further, in the fourth and fifth embodiments described above, as in the sixth embodiment shown in FIG. 11, a roller guide 53 such as a bearing is disposed on the tip side of the hook pin 36, and the hook pin 36 May be formed of an elastic material that can be bent and deformed, and the heater wire 22 may be moved in the longitudinal direction.

  Next, a seventh embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the seventh embodiment, an elevating table 55 as an elevating device is disposed on the base plate 35 so as to be movable up and down (movable up and down), and a pedestal 37 is disposed on the elevating table 55. It is a thing.

  Also, above the pedestal portion 37, a receiving plate 56 as a restricting portion constituting a part of the pressing device 44 is disposed downward, and this receiving plate 56 is supported by a support base 57 as a support portion. The base portion 37 is supported in a fixed state at a predetermined position.

  The receiving plate 56 regulates the intermediate body 32 pushed upward by the elevating table 55 so as not to move further upward, and has a ring shape at a position corresponding to the inner covering portion 20 that becomes the rim portion 15. Is formed. In addition, a receiving groove portion 56a that is curved in a circular arc shape along the outer surface of the inner covering portion 20 that becomes the rim portion 15 is formed in the lower portion of the receiving plate 56. Note that the one and the other pins 36a and 36b are not located on the same cross section, but for the sake of clarity of explanation, FIG.

  Then, after the first surface S1 is formed by the heater wire 22 by the same process as in each of the above embodiments, the elevating table 55 is moved upward together with the pedestal portion 37 to thereby move the inner covering portion 20 of the intermediate body 32. The upper side of the outer surface is fitted into the receiving groove portion 56a of the receiving plate 56, the outer surface of the inner covering portion 20 is pressed against the first surface S1, and the lifting table 55 and the pedestal portion 37 are further moved upward. Thus, the outer surface, for example, the rear surface side of the inner covering portion 20 of the intermediate body 32 is pressed against the first surface S1 of the heater wire 22 and is buried in the pedestal portion 37 together with the heater wire 22. As a result, the pedestal portion 37 is elastically deformed and is pressed along the outer surface of the inner covering portion 20 so as to be deformed into a curved shape from the back side to the front side of the inner covering portion 20. That is, when the inner covering portion 20 exceeds the first surface S1 on the first surface S1 formed by the heater wire 22, the first surface S1 is deformed, and the heater is formed along the outer surface of the inner covering portion 20. The zigzag shape of the line 22 is curved and deformed. In other words, when the outer surface of the inner covering portion 20 of the intermediate body 32 is pressed beyond the first surface S1, the heater wire 22 is deformed so as to be wound along the outer surface of the inner covering portion 20. The second surface S2 wraps a part of the outer surface of the inner covering portion 20 (the portion corresponding to the groove portion 21) from the back side to the front side.

  It should be noted that the hook pin 36 is configured to come out relatively downward from the pedestal portion 37 at a position where the heater wire 22 is wound from the back side to the front side along the outer surface of the inner covering portion 20 in this way. Alternatively, the hooking pin 36 may be separated from the heater wire 22 by lowering the driving device 40 downward at this position.

  As described above, according to the present embodiment, the pedestal portion 37 is pushed up together with the heater wire 22 using the lifting table 55, and the inner covering portion 20 of the intermediate body 32 of the steering wheel 10 is pressed against the receiving plate 56. The inner covering portion 20 and the heater wire 22 can be more reliably buried in the pedestal portion 37, and the heater wire 22 can be more reliably pressed along the outer surface of the inner covering portion 20.

  In the seventh embodiment, the heater wire 22 is pressed along the outer surface of the inner covering portion 20 of the intermediate body 32 that becomes the rim portion 15 as in the eighth embodiment shown in FIG. A loose V-shaped groove 58 may be formed on the surface (upper surface) of the pedestal portion 37, and a circle is formed on the surface (upper surface) of the pedestal portion 37 as in the ninth embodiment shown in FIG. An arcuate groove 59 may be formed. In the eighth and ninth embodiments, the intermediate body 32 is configured such that the heater wire 22 is pressed against the front side with the back side of the inner covering portion 20 as the upper side. The seventh embodiment may be the same as the eighth and ninth embodiments, and the eighth and ninth embodiments are the same as the first to seventh embodiments. Furthermore, the heater wire 22 may be pressed against the back side with the front side facing the occupant of the inner covering portion 20 being the upper side.

  Next, a tenth embodiment will be described with reference to FIGS. In addition, about the structure and effect | action of said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the tenth embodiment, the pedestal portion 37 of the first embodiment has a circular shape, and the upper periphery of the pedestal portion 37 is pressed as a step-shaped winding contact portion. Step part 61 which is a part is provided.

  Outside the step portion 61, a roller 62 is disposed as a pressing device capable of pressing the step portion 61 toward the center side of the pedestal portion 37, that is, toward the guide shaft 47 side. The roller 62 constitutes a part of the pressing device 44, and is supported so as to have a rotating shaft along the vertical direction. The roller 62 can turn around the pedestal portion 37 along the circumferential direction relative to the pedestal portion 37, and advance and retreat along the radial direction relative to the pedestal portion 37. It is possible.

  Then, after the first surface S1 is formed by the heater wire 22 by the same process as in each of the above-described embodiments, the outer surface of the inner covering portion 20 of the intermediate body 32, for example, the back surface is used as the first surface of the heater wire 22. In the state where the inner covering portion 20 of the intermediate body 32 is buried in the pedestal portion 37 together with the heater wire 22 while being pressed against S1, the hooking pin 36 releases the latch of the heater wire 22 and against the raised step portion 61. The roller 62 is advanced and brought into contact, and the outer edge portion of the step portion 61 is moved to the inner covering portion 20 side of the intermediate body 32 along the circumferential direction of the pedestal portion 37 by rotating in the circumferential direction of the pedestal portion 37. Then, it is pushed down sequentially, and it is shaped along with the heater wire 22 along the inner covering portion 20 toward the back side. As a result, the heater wire 22 is deformed so as to be wound along the outer surface of the inner covering portion 20 to form the second surface S2, and this second surface S2 is a part of the outer surface of the inner covering portion 20 (groove portion). Wrap the part corresponding to 21) from the back side to the front side.

  As described above, according to the present embodiment, the roller 62 pushes down the step portion 61 against the outer surface of the inner covering portion 20 of the intermediate body 32 buried in the pedestal portion 37, thereby pressing the heater wire 22 down. The heater wire 22 can be more reliably wound along the inner covering portion 20 with a simple configuration, and can be reliably attached by the groove portion 21.

  In the tenth embodiment described above, the roller 62 is disposed on the inner edge side of the step portion 61 of the pedestal portion 37, that is, on the concave portion 45, and the inner edge portion of the step portion 61 is moved outward. 37 may be sequentially pushed down along the circumferential direction 37, or the outer edge portion and the inner edge portion of the step portion 61 may be pushed down by being arranged on each of the outer edge portion and the inner edge portion of the step portion 61.

  Next, an eleventh embodiment will be described with reference to FIG. In addition, about the structure and effect | action of said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The eleventh embodiment includes a rotating body device 64 as a pressing device that constitutes a part of the pressing device 44 in place of the roller 62 of the tenth embodiment.

  The rotating body device 64 includes a donut plate 65 as a ring body which is a first pressing portion positioned outside the step portion 61 of the pedestal portion 37, that is, a (first) rotating body as an outer pressing portion, It has the 2nd press part located in the recessed part 45 of the base part 37, ie, the disk 66 which is a (2nd) rotary body as an inner side press part.

  The donut plate 65 includes a circular opening 65a having a diameter larger than the outer periphery of the step portion 61 of the pedestal portion 37 at the center, and is positioned opposite to the outer edge portion of the step portion 61 of the pedestal portion 37. The pedestal portion 37 (intermediate body 32) can be eccentrically rotated along a large circular orbit having a diameter larger than the diameter of the step portion 61 of the pedestal portion 37. In the donut plate 65, the inner peripheral edge portion of the opening 65a can press the stepped portion 61 toward the center side of the pedestal portion 37, that is, the guide shaft 47 side.

  The disk 66 has a diameter smaller than the inner circumference of the recess 45, is located opposite to the inner edge of the step portion 61, and is located on the base portion 37 (intermediate body 32). Eccentric rotation is possible along the rotation path of a small circle having a diameter larger than the diameter. And this disk 66 can press the recessed part 45 of the base part 37 in which an outer peripheral edge opposes the step part 61 toward outward.

  Then, after the first surface S1 is formed by the heater wire 22 by the same process as in each of the above-described embodiments, the outer surface of the inner covering portion 20 of the intermediate body 32, for example, the back surface is used as the first surface of the heater wire 22. In the state where the inner covering portion 20 of the intermediate body 32 is pressed against S1 and embedded in the pedestal portion 37 together with the heater wire 22, the hook of the heater wire 22 by the hook pin 36 is released, and FIG. 18 (a) and FIG. As shown in FIG. 18 (b), the donut plate 65 is eccentrically rotated with respect to the pedestal portion 37 (intermediate body 32), so that the inner edge portion of the opening 65a of the donut plate 65 is brought into contact with the raised step portion 61. The outer edge of the step portion 61 is sequentially pushed down along the circumferential direction of the pedestal portion 37 toward the inner covering portion 20 side of the intermediate body 32, and the disk 66 is eccentric with respect to the pedestal portion 37 (intermediate body 32). By rotating, the outer edge of the disk 66 is brought into contact with the inner edge of the raised step 61, and the inner edge of the step 61 is Inward covering portion 20 of the body 32, to elaborate by shaping defeat along the outer surface of the inner cover portion 20 together with the heater wire 22 sequentially pushed down along the circumferential direction of the pedestal portion 37. As a result, the heater wire 22 is deformed so as to be wound along the outer surface of the inner covering portion 20 along the outer surface of the inner covering portion 20 to form the second surface S2, and this second surface S2 is the inner covering. A part of the outer surface of the portion 20 (portion corresponding to the groove portion 21) is wrapped from the back side to the front side.

  Thus, according to the present embodiment, the donut plate 65 and the disc 66 rotated eccentrically with respect to the inner covering portion 20 of the intermediate body 32 buried in the pedestal portion 37 are connected to the outer edge portion and the inner edge portion of the step portion 61. By pressing the heater wire 22 by pushing down each, the heater wire 22 can be more reliably wound along the outer surface of the inner covering portion 20 with a simple configuration, and can be securely attached by the groove portion 21.

  Moreover, since the heater wire 22 is pressed from the outer peripheral side and the inner peripheral side against the outer surface of the inner covering portion 20 by the donut plate 65 and the disc 66, against the outer surface of the inner covering portion 20 having a circular cross section, The heater wire 22 can be more reliably wound.

  Next, a twelfth embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the twelfth embodiment, the hook pin 36 is bent in a crank shape, and a plurality of first and second pin sets 71 and 72 are provided along the circumferential direction of the virtual circle PC. Are set alternately.

  The hook pin 36 is longitudinally connected in the vertical direction and connected to the drive device 40 and is inserted into the guide groove 48. A horizontal shaft portion 75 as an extended portion that is bent and substantially parallel to the surface of the pedestal portion 37, and a hook portion that is bent upward from the front end portion of the horizontal shaft portion 75 and can lock the heater wire 22. A certain locking portion 76 is integrally provided. The hook pin 36 is movable along the guide groove 48 along the radial direction of the virtual circle PC (along the direction intersecting (orthogonal to) the virtual circle PC).

  In each first pin set 71, one and the other first pins 36c and 36d arranged at positions corresponding to the grooves 21 of the intermediate body 32 are set. These one and other first pins 36c and 36d are shifted from each other along the circumferential direction of the virtual circle PC. The one and the other first pins 36c and 36d are positioned by the driving device 40 so that the respective engaging portions 76 are spaced substantially equal to the wire diameter of the heater wire 22 along the virtual circle PC. The first pin 36c has a locking portion 76 inside the virtual circle PC, the other first pin 36d has a locking portion 76 outside the virtual circle PC, and a first position. The locking portion 76 of the pin 36c is located outside the virtual circle PC, and the locking portion of the other first pin 36d is located inside the virtual circle PC and is in a zigzag shape with respect to the virtual circle PC. It can be moved to two positions and can be rotated around the central axis of each vertical axis 74. Accordingly, the heater wire 22 can be arranged along the virtual circle PC on the horizontal shaft portions 75 and 75 between the locking portions 76 and 76 of the one and the other first pins 36c and 36d. .

  Each second pin set 72 has one and other second pins 36e and 36f arranged at positions corresponding to the grooves 21 of the intermediate body 32. These one and other second pins 36e and 36f are shifted from each other along the circumferential direction of the virtual circle PC. In addition, one second pin 36e is alternately (alternately) arranged in the circumferential direction of the one first pin 36c and the virtual circle PC, and the other second pin 36f is the other first pin 36f. The pins 36d and the virtual circle PC are alternately arranged (every other) in the circumferential direction. Further, the one and the other second pins 36e and 36f are positioned by the driving device 40 so that the respective locking portions 76 are spaced substantially equal to the wire diameter of the heater wire 22 along the virtual circle PC. The first pin position where the locking portion 76 of the second pin 36e is inside the virtual circle PC, the locking portion 76 of the other second pin 36f is outside the virtual circle PC, and one second The locking portion 76 of the pin 36e is located outside the virtual circle PC, and the locking portion of the other second pin 36f is located inside the virtual circle PC and is in a zigzag shape with respect to the virtual circle PC. It can be moved to two positions and can be rotated around the central axis of each vertical axis 74. Accordingly, the heater wire 22 can be disposed along the virtual circle PC on the horizontal shaft portions 75 and 75 between the locking portions 76 and 76 of the one and the other second pins 36e and 36f. . Further, the horizontal shaft portion 75 of one and the other second pins 36e and 36f of the second pin set 72 is a locking portion of the one and the other first pins 36c and 36d of the first pin set 71. The first pin set 71 and the second pin set 72 are arranged so as not to interfere with each other.

  Further, the guide groove 48 is provided at a position separated from the virtual circle PC on the outer peripheral side and the inner peripheral side. In other words, the ends of the guide groove 48 on the virtual circle PC side are separated from each other by a predetermined distance. Accordingly, the surface of the pedestal portion 37 between the guide grooves 48 and 48 facing each other via the virtual circle PC has a planar shape that compresses and presses the heater wire 22 along the outer surface of the inner covering portion 20 of the intermediate body 32. The pressing surface 78 is provided in a circular shape that continues to a predetermined width along the virtual circle PC. Further, the guide groove 48 is formed to extend longer in the retracting direction of the hook pins 36 than the position (second position) where the hook pins 36 are retracted to the maximum with respect to the virtual circle PC. One end portion of the guide groove 48 for one first pin 36c and the other end portion of the guide groove 48 for the other second pin 36f are opposed to each other in the radial direction of the virtual circle PC, and the other The other end of the guide groove 48 for the first pin 36d and one end of the guide groove 48 for the second pin 36e are opposed to each other in the radial direction of the virtual circle PC. Accordingly, in plan view, one first pin 36c and the other second pin 36f face each other in the radial direction of the virtual circle PC, and the other first pin 36d and one second pin 36e Opposite the radial direction of the virtual circle PC.

  Further, although not shown, the drum 33 has a first drum for supplying the heater wire 22 to the first pin set 71 and a second drum for supplying the heater wire 22 to the second pin set 72, for example. And the drum is set.

  When the heater wire 22 is wound around the intermediate body 32, first, the first pin set 71 and the other first pin 36c, 36d are first advanced to the virtual circle PC side to the maximum. And the first and second second pins 36e and 36f of the second pin set 72 are set to positions where they are retracted from the virtual circle PC (for example, the second position). After the front end side of the heater wire 22 is pulled out from the drum and fixed by being clamped by a clamp C or the like, it passes between the engaging portions 76 and 76 of the first and other first pins 36c and 36d, along the virtual circle PC. Place in a circle. The pins 36c, 36d, 36e, and 36f are not located on the same cross section, but in order to make the description clearer, they will be described as having almost the same cross section in FIG.

  Next, one end of the second pin set 72 and the other second pin 36e, 36f are set to the first position where the second pin 36e and 36f are advanced to the imaginary circle PC side to the maximum, and the tip of the heater wire 22 from the second drum. After the side is pulled out and fixed by clamping with a clamp C or the like, it passes between the engaging portions 76 and 76 of the first and second second pins 36e and 36f and is arranged in a circle along the virtual circle PC.

  In this state, the one and other first pins 36c and 36d are moved to the second position by the driving device 40, and the one and the other second pins 36e and 36f are moved to the second position by the driving device 40. To the heater wire 22 locked to the locking portions 76, 76 of the first and other first pins 36c, 36d and the locking of the first and second second pins 36e, 36f. The heater wires 22 locked to the portions 76 are arranged in a zigzag manner with respect to the virtual circle PC. At this time, since the pin sets 71 and 72 are arranged in a stacked manner in the vertical direction, the zigzag heater wires 22 and 22 are shaped without interfering with each other. In this way, the heater wires 22 and 22 having a predetermined width are prepared inside and outside the virtual circle PC around the virtual circle PC, and the zigzag heater wires 22 and 22 are provided above the pressing surface 78 by the zigzag heater wires 22 and 22. A first surface S1 is configured.

  Next, the outer surface, for example, the back surface side of the inner covering portion 20 is pressed against the first surface S1 of the heater wire 22 so that the inner covering portion 20 of the intermediate body 32 is aligned with the virtual circle PC. It is buried in the pressing surface 78. As a result, the pedestal portion 37 is elastically deformed, and the heater wire 22 arranged on the surface thereof is curved along the outer surface of the inner covering portion 20 from the back side to the front side of the inner covering portion 20. Pressed to be deformed. At this time, the pressing surface 78 in which the inner covering portion 20 is buried is a series of smooth surfaces in which the guide groove 48 and the like are not positioned, and thus the heater wire 22 can be reliably compressed and pressed. Further, although the guide groove 48 is deformed so as to move toward the virtual circle PC by the deformation of the pedestal portion 37, the guide groove 48 extends longer in the retracting direction of the hook pin 36 than the second position of the hook pin 36. Therefore, even in the state where the pedestal portion 37 is deformed in this way, the free range of the vertical axis portion 74 of the hook pin 36 can be secured, and interference with the hook pin 36 can be suppressed. Accordingly, the heater wire 22 can be easily wound and shaped, and the heater wire 22 can be rolled up (finished).

  When the intermediate body 32 is buried in the pedestal portion 37, the intermediate body 32 may be moved downward and pressed against the pedestal portion 37 as in the first embodiment, The pedestal 37 may be moved upward and pressed against the intermediate body 32 as in the seventh embodiment.

  When the intermediate body 32 is moved downward and the outer surface of the inner covering portion 20 of the intermediate body 32 is pressed against the pedestal portion 37, the hook pin 36 is relatively lowered according to the deformation of the pedestal portion 37, and the heater wire At a position where 22 is disengaged from the locking portion 76, the hook pin 36 is appropriately rotated and retracted into the guide groove 48.

  Further, when the pedestal part 37 is moved upward and pressed against the outer surface of the inner covering part 20 of the intermediate body 32, the hook pin 36 is also raised with the rise of the pedestal part 37, and the heater wire 22 is locked. When approaching the position where it is disengaged from the portion 76, the hook pin 36 is lowered relative to the height of the lock portion 76 to release the heater wire 22, and the hook pin 36 is appropriately rotated. Retreat into the guide groove 48.

  In this way, the heater wires 22 and 22 are attached to the groove portion 21 on the outer surface of the inner covering portion 20 of the intermediate body 32.

  Then, according to the present embodiment, the two heater wires 22 and 22 are connected to the outer surface of the inner covering portion 20 by a process similar to the process for attaching the one heater line 22 similar to the above embodiments. Therefore, the heater wire 22 can be routed densely around the rim portion 15 and the steering wheel 10 can be warmed more reliably and finely.

  In the tenth to twelfth embodiments described above, the intermediate body 32 is configured to press the heater wire 22 against the back side with the front side facing the occupant on the outer surface of the inner covering portion 20 as the upper side. For example, the heater wire 22 may be pressed against the front side with the back side of the outer surface of the inner covering part 20 as the upper side.

  Next, a thirteenth embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the thirteenth embodiment, the hook pins 36 are arranged along a virtual line PL, which is a linear predetermined line, and the heater wires 22 wound around the hook pins 36 are arranged along the outer surface of the inner covering portion 20. Wrapping.

  That is, the hook pin 36 is located along the virtual line PL, and is movable along the guide groove 48 in a direction intersecting (orthogonal) with respect to the virtual line PL. Further, the lower end portion of the hook pin 36 is connected to a movable piece 81 that is positioned below the base plate 35 and can move up and down with respect to the base plate 35.

  Also, one pin 36a and the other pin 36b are positioned so as to be substantially equal to the wire diameter of the heater wire 22 along the virtual line PL, and one pin 36a is on one side of the virtual line PL, and the other The first pin 36b is located on the other side of the virtual line PL, one pin 36a is located on the other side of the virtual line PL, and the other pin 36b is located on one side of the virtual line PL. The pins 36a and 36b can be moved to two positions with respect to the PL, the second position located in a zigzag shape, and can be rotated around each central axis. Therefore, the heater wire 22 can be arranged along the virtual line PL between the one and the other pins 36a and 36b.

  The pedestal portion 37 is a shaping type formed linearly along the imaginary line PL, and the movable range of the hook pin 36 is restricted by a guide groove 48 that intersects (orthogonally) the imaginary line PL. .

  Furthermore, the intermediate body 32 is attached to a moving table 83 as a rotary device that can move along the longitudinal direction of the pedestal portion 37, that is, along the virtual line PL. The moving base 83 includes a support shaft 83a horizontally along the width direction of the pedestal portion 37, and the intermediate body 32 is supported by the longitudinal direction of the pedestal portion 37 by supporting the intermediate body 32 with respect to the support shaft 83a. It is possible to rotate along the direction, that is, the virtual line PL. Therefore, the intermediate body 32 is arranged such that the inner covering portion 20 that becomes the rim portion 15 is sequentially buried along the longitudinal direction of the pedestal portion 37.

  The drum 33 is disposed on one end side in the longitudinal direction of the pedestal portion 37.

  When winding the heater wire 22 around the outer surface of the inner covering portion 20 of the intermediate body 32, first, the first and the other pins 36a, 36b of the hook pin 36 are advanced to the imaginary line PL side to the maximum. In the state of position 1, the front end side of the heater wire 22 is pulled out from the drum 33 and fixed by being clamped by a clamp C or the like, and then passes between the one and the other pins 36a and 36b and straight along the virtual line PL. Arrange in a shape.

  Next, by moving the one and the other pins 36a and 36b to the second position by the driving device 40, the heater wire 22 locked to the locking recesses 42 and 42 of the one and the other pins 36a and 36b is moved. It is arranged in a zigzag shape with respect to the virtual line PL. At this time, for example, the hook pin 36 is moved sequentially from the far side to the near side from the drum 33, so that the smooth feeding of the heater wire 22 supplied from the drum 33 and the stress on the heater wire 22 can be suppressed. In this way, the heater lines 22 having a predetermined width are prepared on both sides of the virtual line PL around the virtual line PL, and the first surface S1 is constituted by the zigzag heater line 22.

  Next, with the support shaft 83a of the moving base 83 inserted into the boss 18 of the intermediate body 32 and rotatably supported, the moving base 83 is moved in the direction away from the drum 33 along the longitudinal direction of the pedestal portion 37. 23, while rotating the intermediate body 32 in the clockwise direction in FIG. 23, that is, in the moving direction, the outer surface of the inner covering portion 20 serving as the rim portion 15 is pressed against the first surface S1 by the heater wire 22. After that, it is pressed against the pedestal 37 together with the heater wire 22 to be buried. As a result, the pedestal portion 37 is elastically deformed, and the heater wire 22 arranged on the surface thereof is curved along the outer surface of the inner covering portion 20 from the outer peripheral side to the inner peripheral side of the inner covering portion 20. It is pressed to be deformed into a shape. At this time, the hook pin 36 is sequentially lowered from one end side to the other end side of the pedestal portion 37 in response to the rotation of the intermediate body 32 by the movable piece 81, so that the inner covering portion 20 serving as the rim portion 15 is pedestal. The holding of the heater wire 22 pressed against the groove 21 on the outer surface of the inner covering portion 20 at a place just immersing in the portion 37 is released by the lowering of the hook pin 36, and along the outer surface of the inner covering portion 20 by the deformation of the pedestal portion 37. To be deformed into a curved surface. In this way, the heater wire 22 is wound around and attached to the groove portion 21 on the outer surface of the inner covering portion 20 of the intermediate body 32 from the outer peripheral side to the inner peripheral side.

  Then, according to the present embodiment, the heater wire 22 hung around the hook pin 36 is pedestal while the inner covering portion 20 provided in an annular shape is rotated in the direction along the circle (circumferential direction) by the moving base 83. By pressing the portion 37 along the outer surface of the inner covering portion 20, the pedestal portion 37 (base plate 35) and the like can be straightened, and the heater wire 22 is connected to the inner covering portion 20 with a simpler and space-saving configuration. It can be attached by wrapping along the outer surface.

  In the thirteenth embodiment, the inner covering portion 20 is not limited to an annular shape, and can be similarly applied to a shape along a part of a circle, for example, an arc shape.

  Further, while the intermediate body 32 is rotated relative to the pedestal portion 37 (base plate 35) by the moving base 83 and the heater wire 22 is attached to the entire inner covering portion 20, the intermediate body 32 is rotated. However, the heater wire 22 may be attached to the entire inner covering portion 20 by moving the pedestal portion 37 (base plate 35) side relative to the intermediate body 32.

  Further, in each of the above-described embodiments, the steering wheel 10 is not limited to the configuration including the three spoke portions 17, and can be applied to a configuration including, for example, the four spoke portions 17.

  And it can replace with an airbag apparatus and can also use the pad body which accommodated the impact-absorbing body, for example.

  The present invention can be suitably used, for example, as a steering wheel for an automobile.

10 Steering wheel that is a steering wheel
15 Rim part
16 Boss
17 spoke
20 Inner sheath
22 Heater wire
23 Outer sheath
31 Production equipment
36 Hook pin as holding member
37 base portion of a cushion body
65 Donut plate as rotating body
66 Disc that is a rotating body
83 Moving platform as a rotary device

Claims (5)

A method of manufacturing a handle having a heater wire between an inner covering portion and an outer covering portion of a rim portion connected to a boss portion via a spoke portion,
The heater wires are alternately hooked between a plurality of holding members sequentially arranged in a zigzag manner across a virtual line set on the upper surface of the cushion body, and the heater wire is placed on the upper surface of the cushion body with the virtual line. A wrapping process arranged in an intersecting zigzag shape;
Wherein the heater wire inside covering portion of the inner cover portion by imposition on opposite sides of the imaginary line by buried in the cushion body and a portion between the zigzag heater wire of the outer surface of the inner cover portion method for producing a handle for the winding can included the step of Ru is deformed to engulf along the outer surface of the characterized in that it is equipped with. A handle manufacturing apparatus for manufacturing a handle having a heater wire between an inner covering portion and an outer covering portion of a rim portion connected to a boss portion via a spoke portion,
A cushion body ,
A plurality of retaining members which are sequentially arranged in a zigzag pattern across the imaginary line which is set on the upper surface of the cushion body,
Means for alternately placing the heater wire on the holding member on the upper surface of the cushion body and arranging the heater wire in a zigzag shape intersecting the virtual line on the upper surface of the cushion body;
The heater wire the inner cover portion for positioning the inner cover portion on both sides of the line of the virtual by buried in the cushion body by the pressing of a portion with the zigzag heater wire of the outer surface of the front Symbol inner cover portion Means for deforming to wrap around the outer surface of the
An apparatus for manufacturing a handle , comprising: The apparatus for manufacturing a handle according to claim 2, wherein each holding member is movable between two positions away from the virtual line on both sides thereof . Claim 2 or 3, characterized in that it comprises an inner side rotating body parts located on both sides of the imaginary line of the heater wire by eccentrically rotating pressing along the outer surface of the inner cover portion with respect to the covering portion The manufacturing apparatus of the described handle. Inner covering portion, some, if no less is provided in a circular arc shape,
Comprising a rotary device for rotating the center of the arcuate portion of the front Symbol inner coating portion as a rotation axis,
5. The handle according to claim 2, wherein the cushion body presses the heater wire hooked on the holding member in a zigzag manner along the outer surface of the inner covering portion rotated by the rotary device. manufacturing device.

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