JPH0677971B2 - Manufacturing method of fiber-reinforced resin steering wheel core material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method for producing a fiber-reinforced resin steering wheel core material, more specifically, a resin-impregnated long fiber is formed into a mold jig by a guide jig of a winding machine. The present invention relates to a method for automatically winding a steering wheel core material.

(Prior Art) A steering wheel core member is composed of a ring portion W1, a spoke portion W2, and a boss portion W3, as indicated by a symbol W in FIG. Conventionally, such steering wheel core material W
In order to manufacture the resin with a fiber-reinforced resin, a dedicated jig was provided and the resin-impregnated continuous fiber was wound around the jig in a predetermined winding pattern.

4 and 5 show an example of the die jig, and the die jig indicated by reference numeral 1 is a disk-shaped first winding jig 3 fixed to the rotating shaft 2. And a ring-shaped second winding jig 4 attached to the first winding jig 3 and one end of the rotary shaft 2 extending through the first winding jig 3. The boss 5 is attached to the boss 5. A groove having a semicircular cross section is formed on each of the peripheral portions of the first and second winding jigs 3 and 4, and a circumferential groove having a U-shaped cross section is formed between them in the above-mentioned combined state. 6 is formed. Further, the second winding jig 4 has cutout grooves 7 formed at three locations in the circumferential direction.

As a result, the mold jig 1 is appropriately rotated to wind the resin-impregnated long fibers 8 around the circumferential groove 6, and the circumferential groove 6 is passed through the notch groove 7.
By winding from the boss fitting 5 to the circumferential groove 6 from the boss fitting 5, the steering wheel core material W shown in FIG. 4 can be integrally obtained. But traditionally,
To manufacture such steering wheel core material,
As described above, since the resin-impregnated super fiber 8 has to be wound around the mold jig 1 through a complicated path, there is no choice but to resort to manual winding.

(Problems to be Solved by the Invention) However, according to the conventional manual winding, not only productivity is low and it is difficult to obtain a certain quality, but also a complicated winding pattern of resin-impregnated long fibers is formed. There were various problems inherent in that it was difficult to remember, the labor load increased, and the fine powder frayed from the resin-impregnated long fibers deteriorated the working environment and required costly countermeasures.

Therefore, recently, the inventors of the present application studied various measures for automating the winding of the resin-impregnated long fibers 8 around the mold jig 1 and planned a system as shown in FIG. This system comprises an impregnating device 13 for continuously impregnating the continuous fiber 12 drawn from the bobbin 11 with a synthetic resin, and a mold jig for winding the resin-impregnated continuous fiber 8 drawn out from the impregnating device 13. A multi-joint robot having a rotary table 14 on which 1 is mounted and a guide jig 15 for guiding the resin-impregnated long fibers 8 drawn out from the impregnating device 13 to the die jig 1 (winding up). 16), a control device 17 for controlling the operations of the rotary table 14 and the robot 16, and a predetermined tension is applied to the resin-impregnated filament 8 which is adjacent to the impregnation device 13 and is guided to the mold jig 1. A tensioner 18 and a tensioner 18 are included.

Here, as shown in FIG. 7, the tensioner 18 is positioned between the guide rollers 19 and 19 disposed on the inlet side and the outlet side, respectively, and the resin impregnated long fiber 8 is hung between the guide rollers 19. Free roller 20 and resin-impregnated long fiber 8
On the other hand, the tension determined by the free weight of the free roller 20 can be applied. The guide jig 15 is, as shown in FIG. 8, provided with a hole 22 through which the resin-impregnated long fiber 8 is inserted at the tip of a rod-shaped main body 21 and is provided at the tip of the arm of the robot 16 in advance. It is fixed to the flange plate 23 with bolts 24.

With such a configuration, the robot 16 is taught in advance, the long fiber 12 is pulled out from the next bobbin 11, and the impregnating device 13,
When the control device 17 is activated by guiding it to the mold jig 1 through the tensioner 18 and the guide jig 15, the rotary table 14 rotates, and the robot 16 is driven in synchronism with this, so that the mold jig 1 is impregnated with resin. The long fibers 8 are automatically wound.

However, the tension applied to the resin-impregnated continuous fiber 8 is increased by the tensioner 18 according to the manufacturing method of performing the automatic winding.
The guide jig 15
When moving from the notch groove 7 to the boss metal fitting 5, that is, the tension applied to the resin-impregnated long fiber 8 at the time of forming the spoke W2 temporarily increases, and as a result, the resin-impregnated long fiber 8 is strongly pressed against the guide jig 15. As a result, the resin may be squeezed out, or fuzz may occur, which is a problem.

(Means for Solving Problems) The present invention has been made to solve the above-mentioned conventional problems, in which a continuous fiber is impregnated with a resin, and subsequently, a guide provided to a robot is provided with the resin. In a method for manufacturing a steering wheel core material having a ring portion, a spoke portion, and a boss portion integrally by automatically winding the jig around a die jig with a predetermined tension, It is characterized in that when it is moved to the winding portion of the boss portion, a feeding force is applied to the long fibers to temporarily loosen the tension.

(Operation) In the method for manufacturing the fiber-reinforced resin steering wheel core material having the above-described configuration, the tension applied to the resin-impregnated long fibers is loosened when the guide jig is moved from the ring winding portion to the boss winding portion. Therefore, the resin-impregnated long fibers are not strongly pressed by the guide jig, and it is possible to prevent the resin from being squeezed out and fluffed.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

FIG. 1 shows a basic embodiment of an apparatus for manufacturing a fiber-reinforced resin steering wheel core material according to the present invention. The same parts as those shown in FIGS. 3 to 8 are designated by the same reference numerals, and the description thereof will be omitted. The feature of this embodiment is that a delivery device 20 capable of applying a feeding drive to the resin-impregnated long fibers 8 is arranged along the flow line of the resin-impregnated long fibers 8 from the tensioner 18 to the die jig 1. There is a point.

As shown in FIG. 2, the feeding device 20 includes a first guide roller 21 fixedly arranged and a first guide roller 21.
A second guide roller 22 arranged so as to be movable back and forth with respect to
And a motor 24 that connects the second guide roller 22 and the belt 23.
And a cylinder 25 supporting the motor 24. That is, while the motor 24 is being driven, the operation of the cylinder 25 causes the second guide roller 22 to move to the first guide roller 21.
The resin-impregnated continuous fiber 8 between both guide rollers.
By sandwiching, the resin-impregnated long fibers 8 are fed out at an appropriate speed determined by the rotation of the motor 24.

On the other hand, the motor 24 and the cylinder 25 are control devices for the robot 16.
It is connected to 17 by a signal line 26, and the drive timing or the rotation speed is controlled by a signal sent from the control device 17. The driving timing is the jig 1
In contrast to (see FIGS. 4 and 5), the guide jig 15 moves from the notch groove 7 which is the branch portion of the resin-impregnated long fiber 8 toward the boss metal fitting 5, and the motor 24 of the motor 24. The rotation speed is preliminarily set so that the feeding speed of the resin-impregnated filament 8 matches the moving speed of the guide jig 15.

With such a configuration, necessary data such as the winding pattern, the number of windings, and the braking timing of the sending device 20 is input to the control device 17 in advance, and the robot 16 is taught by operating a teaching box (not shown). And bobbin
The long fiber is pulled out from 11 and guided to the mold jig 1 through the impregnating device 13, the tensioner 18, and the guide jig 15, and one end thereof is connected to the mold jig 5
Stick to. After that, when the controller 17 is activated, the robot
16, the resin-impregnated long fibers 8 are sequentially wound around the jig 1, and finally the steering wheel core material W having a predetermined shape is formed.
(Fig. 3) is completed.

Then, when the guide jig 15 moves from the cutout groove 7 which is the branch portion of the resin-impregnated long fiber 8 toward the boss metal fitting 5, the motor 24 and the cylinder 25 are operated by the command of the controller 17, and the resin impregnation is performed. A feeding force is applied to the long fibers 8, and as a result, excessive tension is not applied to the resin-impregnated long fibers 8.

In the above embodiment, the feeding speed of the resin-impregnated long fibers 8 by the guide rollers 21 and 22 was made to match the moving speed of the guide jig 15 at the time of molding the spoke portion. It is needless to say that the size may be an appropriate size so that excessive tension does not occur in 8.

(Effects of the Invention) As described in detail above, in the manufacturing method of the steering wheel core material according to the present invention, the tension applied to the resin-impregnated long fibers is applied to the guide jig from the ring portion winding portion by the boss. Since it is loosened when it is moved to the partial winding part, the resin impregnated long fibers are not strongly pressed by the guide jig as a result, and it is possible to prevent the resin from being squeezed out and fluffing, and the robot automatically winds it. The effect that the steering wheel core material excellent in quality can be stably manufactured even if the above is performed.

[Brief description of drawings]

FIG. 1 is a system diagram schematically showing the overall structure of an apparatus for manufacturing a steering wheel core material according to the present invention, and FIG. 2 is a schematic diagram showing the structure of a delivery apparatus which is a part of the apparatus.
FIG. 3 is a perspective view showing the external shape of the steering wheel core material, and FIGS. 4 and 5 are front and side views showing the mold jig.
FIG. 6 is a system diagram schematically showing a general mode of automatic winding, and FIG. 7 is a schematic diagram showing a tensioner which is a part of the system.
FIG. 8 is a schematic view showing the guide jig similarly. 1 …… Mold jig 8 …… Resin impregnated filament 15 …… Guide jig 16 …… Robot (hoisting device) 17 …… Control device 18 …… Tensioner 20 …… Sending device W …… Steering wheel core material W1 ...... Ring part W2 ...... Spoke part W3 ...... Boss part

Claims (1)

[Claims] 1. A continuous flow long fiber is impregnated with a resin,
Then, in a method of manufacturing a steering wheel core material having a ring portion, a spoke portion, and a boss portion integrally wound around the die jig automatically with a predetermined tension by a guide jig provided to a robot, A method for manufacturing a core material of a fiber-reinforced resin steering wheel, characterized in that, when the guide jig is moved from a winding portion of a ring portion to a winding portion of a boss portion, a feeding force is applied to the long fibers to temporarily loosen the tension. .