JP3954274B2 - Hydraulic transfer method for steering wheel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydraulic transfer method for a steering wheel suitable for decorating a checkerboard pattern along the circumferential direction of a steering wheel of an automobile.
[0002]
[Prior art]
While car interior parts are often made of plastic molded products, the cost is reduced, and in order to meet the needs of consumers who demand a sense of quality, the surface of plastic molded products is decorated with grain.
[0003]
In the steering wheel, there is known a method of giving a high-class feeling as if it was formed of a single round bar-like wood by applying a grid pattern along the circumferential direction by a hydraulic transfer method (specialty). (See Kaisho 61-5981).
[0004]
As shown in FIG. 6, the lower end side of the steering wheel W in a state where the water-soluble transfer film 21 printed with a grid pattern along the longitudinal direction is floated on the liquid surface of the transfer tank 22 and the transfer film 21 is wetted. The rim portion R of the steering wheel W is made upright so as to be submerged, and is horizontally moved while being rotated along the grid pattern, thereby decorating the rim portion R of the steering wheel W along the circumferential direction. A checkerboard pattern can be formed.
[0005]
[Problems to be solved by the invention]
However, this method has a problem that a uniform grid pattern cannot be applied over the entire circumference of the steering wheel W.
[0006]
That is, when the hydraulic film is transferred by floating the transfer film 21 and then moving horizontally while rotating the steering wheel W, a time lag from the start of transfer to the end of transfer occurs.
[0007]
For this reason, the degree of wetting of the transfer film 21 is different at the beginning and at the end, and the grain pattern transferred at the end of the transfer spreads more than the grain pattern transferred immediately after the start of the transfer.
[0008]
In addition, even when the angular velocity of the steering wheel W is kept constant during the hydraulic transfer, the ink particles forming the checkerboard pattern are rough and fine as in the case of pattern unevenness caused by the difference in angular velocity. Turned out to be.
[0009]
This is seen when the steering wheel mounting portion 23 of the steering wheel W is not formed at the center thereof, or when the steering wheel W itself is not a perfect circle, and is transferred to a part far from the steering shaft mounting portion 23. Pattern ink particles become rough.
[0010]
Furthermore, when the rim portion R of the steering wheel W is transferred upright with respect to the water surface, a pattern seam is formed in the inner portion of the rim portion R. The seam of the lower half of the circle can be seen, and the seam of the right half of the circle can be seen from the passenger seat.
[0011]
Furthermore, the rim portion R of the steering wheel W covers the left and right grip portions G, G to which the spokes are connected with synthetic leather or the like, but the pattern is transferred to the covered portion. There was also a problem that the transfer film was wasted.
[0012]
The present invention, in the case of applying the transfer pattern to the steering wheel, can be subjected to uniform transfer pattern over the entire circumference of the steering wheel even if time lag until completion of the transfer from the initiation of transcription also Inner portion of the steering wheel It is a technical problem to prevent a pattern seam from appearing on the screen and to allow the transfer film to be hydraulically transferred straight along the circumferential direction of the steering wheel .
[0013]
[Means for Solving the Problems]
In order to solve this problem, a hydraulic transfer film on which an arbitrary pattern is printed is allowed to enter the transfer tank from its front end side, and proceeds on the water surface from one end side to the other end side of the transfer tank, The steering wheel was pressed against the hydraulic transfer film at a predetermined transfer position and the back side was inclined upward and the lower end side was submerged so that the pressed portion moved along the moving direction of the transfer film . In the water pressure transfer method for a steering wheel that performs water pressure transfer on the surface while rotating at that position in the posture, when the steering wheel is regarded as a circle, the steering wheel rotates at a water entry position where the lower end is submerged. Steering so that the direction when the tangent of the circle is projected onto the water surface of the transfer tank coincides with the traveling direction of the hydraulic transfer film. It is characterized by rotating by inclining the axis of rotation of Guhoiru.
[0014]
According to the present invention, the hydraulic transfer film enters the transfer tank from the front end side, proceeds on the liquid surface, and is transferred to the surface of the steering wheel rotated at that position when it reaches the transfer position. At this time, both the film transferred to the transfer start site of the steering wheel and the film transferred to the transfer end site have the same time from entering the transfer tank until reaching the transfer position. Accordingly, the degree of wetting of the transfer film is the same at the start of transfer and at the end of transfer, and when the checkerboard pattern is printed on the hydraulic transfer film, a uniform checkerboard pattern is formed.
[0015]
In addition, since the hydraulic pressure is transferred with the back side facing upward, the pattern seam is formed at a position shifted from the inside of the steering wheel to the back side by the inclination angle, and the pattern seam is formed from the driver's seat and passenger seat. can not see.
[0016]
Furthermore, when the steering wheel W is regarded as a circle, the direction when the tangent of the circle at the water entry position of the steering hole that starts submerging in the transfer tank is projected onto the water surface of the transfer tank is the traveling direction of the hydraulic transfer film. Since the rotation axis is inclined so as to coincide with each other, the steering wheel does not enter the slanting direction with respect to the traveling direction of the transfer film, and therefore, the checkerboard pattern printed on the hydraulic transfer film is in the circumferential direction of the steering wheel. Is transcribed straight along.
[0017]
The invention according to claim 2 is characterized in that the steering shaft mounting portion of the steering wheel is the center of rotation, and the hydraulic pressure is transferred onto the surface of the steering wheel while variably controlling the angular velocity so that the peripheral velocity at the time of water entry is constant according to the shape of the steering wheel. It was made to give.
[0018]
According to the present invention, when the distance from the steering shaft mounting portion to the steering wheel is long, the angular velocity is reduced according to the turning radius, and when the distance is close, the angular velocity is increased according to the turning radius. The peripheral speed is kept constant according to the shape of Therefore, the relative speed with respect to the transfer film is kept constant, and there is no pattern unevenness in which the ink particles become rough at a portion far from the handle shaft mounting portion.
[0019]
According to a third aspect of the present invention, while rotating the steering wheel, when the grip portion arrives at the submerged position, the steering wheel is raised above the water surface until the grip portion passes, and the rotational speed is higher than the rotation speed at the time of transfer. It was made to rotate.
[0020]
According to the present invention, a pattern can be transferred by skipping a portion that does not need to be decorated by hydraulic transfer, so that the transfer film can be saved correspondingly.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a hydraulic transfer device used in the method of the present invention, FIG. 2 is an explanatory diagram showing a hydraulic transfer method for a steering wheel according to claim 1, FIG. 3 is an explanatory diagram showing the inventive method of claim 2, and FIG. FIG. 5 is an explanatory diagram showing the inventive method of claim 4, and FIG. 5 is an explanatory diagram showing the inventive method according to claim 5.
[0022]
A hydraulic transfer device 1 shown in FIG. 1 has a transfer tank 2 in which a water flow from one end side to the other end side is formed, and a hydraulic transfer film 3 wound in a roll shape from the upstream side at the same speed as the flow velocity of the water flow. And an unwinding device 4 for unwinding and entering the transfer tank 2. The hydraulic transfer film 3 is formed by printing a grid pattern along the longitudinal direction of a water-soluble film such as polyvinyl alcohol.
[0023]
The transfer tank 2 is provided with a dipping device 5 for rotating the lower end rim portion R of the steering wheel W while being submerged in the downstream side thereof. In this dipping device 5, the peripheral speed when the water enters the rim portion R of the steering wheel W and the motor 8 having the rotating shaft 7 attached to the handle shaft attachment portion 6 of the steering wheel W is maintained at the traveling speed of the hydraulic transfer film 3. As shown, a controller 9 is provided that variably controls the angular velocity of the rotating shaft 7 of the motor 8 in inverse proportion to the turning radius.
[0024]
As shown in FIG. 2A, the rotating shaft 7 of the dipping device 5 is attached to the handle shaft attachment portion 6 from the back side of the steering wheel W, and its tip is so that the back side of the steering wheel W is obliquely upward. It is inclined 45 ° with respect to the horizontal direction.
However, if the steering wheel W is tilted so that the back side is obliquely upward, the tangential direction on the water entrance surface of the rim portion R, that is, the steering that starts submerging when the rotating steering wheel W is regarded as a circle, is assumed. The direction when the tangent line of the circle at the water entry position of the hole W is projected onto the water surface is oblique to the traveling direction of the hydraulic transfer film 3 as shown in FIG. 2 (b). May be bent and transferred.
[0025]
For this reason, in this example, as shown in FIG. 3 , the rotating shaft 7 is a circle at the water entry position of the steering hole W where the submersion starts when the steering wheel W rotating with the lower end side submerged is regarded as a circle. Is inclined at a predetermined angle toward the upstream side of the transfer tank 2 so that the direction when the tangent line is projected onto the water surface can coincide with the traveling direction of the hydraulic transfer film 3.
[0026]
Further, the entire dipping device 5 is supported by the lifting device 10 so that the steering wheel W can be lifted and lowered at an arbitrary timing with the steering wheel W attached to the rotary shaft 7.
[0027]
The above is an example of the configuration of the hydraulic transfer device used in the method of the present invention. Next, the method of the present invention will be described.
Also not a, the rotary shaft 7 the tip of the motors 8 in a state of mounting the steering wheel W, while rotating supports at a height to submerge its lower end, the water pressure transfer film straight grain pattern has been printed in the longitudinal direction 3 is unwound from the upstream side of the transfer tank 2 and advanced on the water surface.
[0028]
The hydraulic transfer film 3 that has traveled along the water flow in the transfer tank 2 is sufficiently wet until it reaches the transfer position and starts to melt, and the ink of the checkerboard pattern remains on the water surface. When the rim portion R is submerged, a grid pattern is transferred and formed on the surface thereof.
[0029]
At this time, the steering wheel W moves horizontally at the position so that the portion pressed against the hydraulic transfer film 3 moves at a speed substantially equal to the traveling speed along the traveling direction of the transfer film 3. Therefore, the time from when the hydraulic transfer film 3 is placed to the transfer position where the steering wheel W is rotating is the same at the start of transfer and at the end of transfer.
[0030]
Therefore, the degree of wetting of the transfer film is the same at the start of transfer and at the end of transfer, and the checkered pattern at the end of transfer does not spread larger than the checkered pattern at the start of transfer, and a uniform checkered pattern can be formed.
[0031]
Further, as shown in FIG. 4 (a), the steering wheel W is formed in a substantially circular shape, and each portion thereof is formed as in the case where the handle shaft mounting portion 6 is formed slightly below the center. If the radius of rotation differs according to the above, hydraulic pressure transfer is performed by variably controlling the angular velocity .
[0032]
In this case, as shown in the graph of FIG. 4B, the rotation radius r is larger on the upper end side of the steering wheel W and smaller on the lower end side. Then, the angular velocity ω of the rotating shaft 7 of the motor 8 is variably controlled by the controller 9 in inverse proportion to the turning radius r, and the peripheral speed v when the rim portion R of the steering wheel W enters the water advances the hydraulic transfer film 3. The speed is maintained approximately equal to the speed.
[0033]
Accordingly, the relative speed with respect to the transfer film 3 is kept constant when the water enters, and there is no occurrence of pattern unevenness in which the ink particles become rough at a portion far from the handle shaft attachment portion 6.
[0034]
Note that the circumferential speed v of the steering wheel W may be set faster than the traveling speed of the hydraulic transfer film 3 within a range where no pattern breaks occur, and is slower than the traveling speed of the hydraulic transfer film 3 within a range where wrinkles do not occur. It may be set.
[0035]
Further, the steering wheel W is rotating shaft 7 of the motor 8 as shown in FIG. 2 (a) are rotated to tilt the distal end side to 45 ° downward, tilt oblique rear side of the steering wheel W is obliquely upward is rotated in a posture in which is, water pressure transfer is performed on the surface.
[0036]
According to this, the hydraulic transfer film 3 is wound around the rim portion R of the submerged steering wheel W, and the hydraulic transfer films 3 are joined to each other on the upper surface side of the inclined rim portion R. It is formed at a position shifted from the inward portion of W by the inclination angle (45 °) on the back side, so that the pattern seam is not visible from the driver's seat or passenger seat.
[0037]
Furthermore, as shown in FIG. 3, when the steering wheel W rotating with the lower end side submerged is regarded as a circle, the tangent of the circle at the water entry position of the steering hole W where submergence starts is projected onto the water surface. Since the tip side of the rotating shaft 7 is inclined by a predetermined angle toward the upstream side of the transfer tank 2 so that the direction coincides with the traveling direction of the hydraulic transfer film 3, the pattern of the hydraulic transfer film 3 is the rim portion R. in water inlet position to be transferred to, the traveling direction of the rim R, matches the traveling direction of the hydraulic transfer film 3, straight grain pattern printed on the water pressure transfer film 3 is, straight along the circumferential direction of the steering wheel W Is transcribed.
[0038]
Further, when the pattern is transferred by skipping the grip portion G of the steering wheel W, the water pressure is transferred by the method of claim 5. For example, as shown in FIGS. 5A to 5E, decoration portions 11 and 12 having center angles of 150 ° and 90 ° are formed on the upper and lower sides of the rim portion R of the steering wheel W, and hydraulic pressure transfer is performed on both left and right sides. A case where grip portions G and G having a central angle of 60 ° that do not need to be decorated are formed will be described.
[0039]
Decorative portions 11, 12 and the grip portion G, a boundary G is counterclockwise and L ₁ ~L _4, if it is rotated clockwise the steering wheel W to the water pressure transfer in order from L _1, first, a predetermined steering wheel W The dipping device 5 is lowered while rotating at the angular velocity (FIG. 5A).
[0040]
Then, being immersed rim R when the decorative start position L ₁ arrives at a position that comes into contact with the water surface (FIG. 5 (b)), float the rim portion R on the water surface where the decorative interrupt position L ₂ is submerged It is raised to (FIG. 5 (c)) Rutotomoni, the decorative resume position L ₃ is rotated faster than the angular speed at the time of transfer until arriving at a position in contact with the water surface.
[0041]
Then, at the time when the decorative resume position L ₃ arrives at a position that comes into contact with water, back to the original angular velocity, being immersed in the rim portion R again (FIG. 5 (d)), decorative end position L ₄ is submerged By the way, the rim portion R is raised so as to float on the water surface (FIG. 5E).
[0042]
In this way, the hydraulic pressure is not transferred to the grip portions G, G that do not need to be decorated, and when the decoration is interrupted by raising the steering wheel W, it is rotated at a higher speed than the angular velocity at the time of transfer. Therefore, the hydraulic transfer film 3 is not wasted, so that the hydraulic transfer film 3 can be saved.
[0043]
In addition, the hydraulic transfer film 3 is not restricted to what printed the grid pattern, but the pattern is arbitrary.
[0044]
【The invention's effect】
As described above, according to the method of the present invention, when a transfer pattern is applied to the steering wheel, a uniform transfer pattern can be applied over the entire circumference of the steering wheel even if there is a time lag from the start of transfer to the end of transfer. At the same time, since the rear side is rotated while being inclined obliquely upward, the pattern seam can be moved to the rear side of the steering wheel.
Further, since the traveling direction of the rim portion and the traveling direction of the hydraulic transfer film coincide with each other at the water entering position where the pattern of the hydraulic transfer film is transferred to the rim portion, the pattern printed on the hydraulic transfer film is There is an effect that the image is transferred straight along the circumferential direction .
[0045]
According to the second aspect of the invention, since the peripheral speed is constant, there is no pattern unevenness in which the ink particles become rough at a portion far from the handle shaft mounting portion, and the third aspect of the invention is further improved. In this case, the transfer film can be wasted.
[Brief description of the drawings]
FIG. 1 shows a hydraulic transfer device used in the method of the present invention.
FIG. 2 is an explanatory diagram illustrating an example of an inclination angle of a rotating shaft.
FIG. 3 is an explanatory diagram showing an example of an inclination angle of a rotating shaft.
FIG. 4 is an explanatory diagram showing an example of a method for variably controlling the angular velocity.
FIG. 5 is an explanatory diagram showing an example in which water pressure transfer is performed while raising and lowering a steering wheel.
FIG. 6 is an explanatory diagram showing a conventional method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ......... Water pressure transfer apparatus 2 ......... Transfer tank 3 ......... Water pressure transfer film W ......... Steering wheel 6 ...... Handle shaft attachment part G ......... Grip part

Claims (3)

A water pressure transfer film (3) on which an arbitrary pattern is printed is placed in the transfer tank (2) from the front end side, and is advanced on the water surface from one end side to the other end side of the transfer tank (2). The steering wheel (W) is pressed against the hydraulic transfer film (3) at a predetermined transfer position and the back side is inclined upward so that the pressed portion moves along the moving direction of the transfer film. In the water pressure transfer method of the steering wheel that performs water pressure transfer on the surface while rotating at that position in a posture in which the lower end side is submerged ,
When the steering wheel (W) is regarded as a circle, the tangent of the circle at the water entry position of the steering wheel (W) rotating with the lower end submerged is projected onto the water surface of the transfer tank (2). A hydraulic transfer method for a steering wheel, characterized in that the rotating shaft (7) of the steering wheel (W) is inclined and rotated so that the direction coincides with the traveling direction of the hydraulic transfer film (3) .   With the steering shaft (6) of the steering wheel (W) as the center of rotation, the angular velocity is variably controlled on the surface of the steering wheel (W) according to the shape of the steering wheel (W) while the angular velocity is variably controlled. The water pressure transfer method for a steering wheel according to claim 1, wherein water pressure transfer is performed.   While rotating the steering wheel (W), when the grip part (G) that does not need to be decorated by water pressure transfer arrives at the submerged position, the steering wheel (W) is moved until the grip part (G) passes. The method for transferring water pressure to a steering wheel according to claim 1 or 2, wherein the water pressure is raised above the water surface and rotated at a higher speed than the angular velocity at the time of transfer.

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