JPS6124189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for transferring to a tapered cylindrical molded product.

Conventionally, when transferring to this type of product, if the transfer sheet is fed linearly as in the case of a conventional simple cylindrical molded product, the feeding speed of the transfer sheet and the tapered surface of the molded product will vary depending on the taper of the molded product. Wrinkles are likely to occur due to the difference in linear velocity. For this purpose, the transfer sheet is cut and freely fed between a transfer roll and a molded product receiving jig, or the transfer sheet is fixed and the molded product is rolled on it.

However, with the former method, the transfer sheet must be cut one by one, resulting in a lack of productivity, and with the latter, there are problems in that the transfer pressure is not sufficient or wrinkles are likely to occur during the rotational movement stage. However, it has the disadvantage of being slow.

The present invention was invented in order to improve the above points, and the present invention is designed to improve the above-mentioned points. The above-mentioned problem is solved by moving the molded article according to the trajectory of the tapered shape of the molded product.

That is, the present invention provides a transfer roll that is rotatably and vertically movable with respect to the machine frame and has the same external shape as the molded product, and a molding device that rotates in contact with the transfer roll via a transfer sheet. The transfer roll is equipped with a jig for setting the product, a paper feed section and a take-up section for the transfer sheet, and the transfer roll swings left and right around a pivot point relative to the machine frame under the central axis, and the swing angle is A rotary table determined by the operation of an air cylinder of a machine frame that is adjusted according to the fan-shaped opening angle in the developed view of the molded product, and a rotary table that is further provided on the rotary table to detect marks made one pitch at a time on the transfer sheet. A timer is activated by the input from the switch, and after a certain period of time, the motor and the winding section are directly connected, and the detector detects the transfer sheet. It is equipped with an electromagnetic clutch that disconnects the motor and the winding section when a mark is detected, and an air cylinder device installed in the machine frame that reciprocates the rotary table, which operates for a certain period of time when a timer is activated by input from a switch. This is a transfer device that uses the outer peripheral surface of a molded product as the surface to be transferred, and even if the outer peripheral surface is tapered, continuous transfer to the surface without slippage can be achieved by turning on the switch. It has the characteristic that it can be carried out automatically and efficiently.

The embodiments shown in the drawings will be described below.

First, to explain the basic principle of the present invention, a printing a is applied to the transfer sheet 1 with the outer peripheral surface of a tapered molded product developed as shown by the solid line in FIG. Further, the transfer sheet 1 is provided with detection marks 2 at every pitch.

The transfer start position of the fan-shaped pattern a, which is a developed view of the molded product printed on the transfer sheet 1, is AA ₁ , the transfer end position is BB ₁ , and the intersection angle of these extended lines, that is, the fan-shaped opening angle is θ.

Then, the heated transfer roll 3 and the receiving jig 4 in which the molded product is set are formed on the same tapered surface as the tapered surface of the molded product, so that the small diameter portion and the large diameter portion of each are shown in Fig. 2. As shown, the transfer sheet ₁ is placed so as to be in line contact at the same position, and is rotated and fixed so that the circumferential speeds of the outer peripheral surfaces are the same. If the image on the transfer sheet 1 is moved by one rotation, that is, by an angle of θ, as shown by the chain line in FIG. 1, the pattern on the transfer sheet 1 will be transferred to the molded product without slipping.

From the above, on the contrary, the transfer roll 3 and the receiving jig 4
Suppose that the transfer sheet is moved by rotating it at a constant AA ₁ position, that is, if the transfer sheet 1 is constantly moved by an angle of θ such that it takes the tangential direction with respect to the center locus CC ₁ of the fan-shaped pattern a, Transfer without slippage similar to that described above will be performed.

This also means that the paper feeding section and the winding section of the transfer sheet 1 can be integrated to move the transfer sheet along the center locus of the fan-shaped pattern a.

From the above, when transferring to a molded product with a tapered outer peripheral surface, the transfer sheet on which the developed view of the molded product is printed is placed between the transfer roll and the molded product in accordance with the trajectory of the tapered shape of the developed view. In order to match the tapered trajectory of the developed view, the paper should always be fed in the tangential direction with respect to the center trajectory of the developed view. The transfer sheet may be fed between the transfer roll and the molded product so that the traveling direction of each portion is always perpendicular to the line contact position between the transfer roll and the molded product.

The above-mentioned movement can be performed by moving the feeding section and the winding section of the transfer sheet as one body to the same angle as the fan-shaped opening angle of the developed view of the molded product at the contact position of the roll. In addition, if the transfer sheet is heated and pressurized by the transfer roll while rotating at a fixed position so that the peripheral speeds of the outer peripheral surfaces of the transfer roll and the molded product are the same, the transfer sheet can be transferred to the molded product without slipping at all times. It is something that can be done.

3 and 4 show specific embodiments of the apparatus of the present invention based on the above principle.

That is, the transfer roll 3 is made of a heat-resistant elastic material such as silicone rubber, and is constantly heated by an electric heating device 5 and driven by a motor 6. The installed head 7 of this transfer roll 3 is connected to an air cylinder 8 supported by an arm 9a of a column 9.
It is designed so that it can be lowered by a spring 10, and can be returned to its original position by a spring 10.

In addition, the spring may be abolished and the timer may be moved up and down using only the air cylinder.

A receiving jig 4 facing the transfer roll 3 is rotatably mounted on a support 9, and is driven by the contact pressure of the transfer roll 3.

The rotary table 11 is a movable plate 12a of the machine frame 12 disposed directly below the line connecting the 3 axes of the transfer roll and the 4 axes of the receiving jig.
The rotating table 11 is configured to be able to swing left and right about a pivot shaft 13, and a paper feeding section and a winding section for the transfer sheet 1 are set on the rotary table 11.

Reference numeral 14 denotes a paper feed reel in the paper feed section on which the unused transfer sheet is wound, and the transfer sheet 1 is then passed through a detector 15 and a plurality of guide bars 16, which are also set on the rotary table 11, and is then sent to the receiver. Ingredients 4
being led upwards.

The winding section consists of a guide bar 18 and feed rollers 19, 2.
0 and a take-up reel 17, and the transfer sheet 1 is wound up on the take-up reel 17 from the receiving jig 4 through a guide bar 18, feed rollers 19 and 20.

Also, a tension roller 2 is attached to the head 7 that moves up and down.
There is a support frame 30 having a support frame 30 having a tension roller 29, which allows the transfer sheet 1 to be brought into good pressure contact with the molded product during transfer. The feed roller 20 is driven by a motor 21 which is also set on the rotary table 11 via an electromagnetic clutch 22 and a universal joint 23. The reel 17 is adapted to be rotated.

As shown in FIGS. 4 and 5, the above-mentioned movable plate 12a is movable along the guide of the machine frame 12 parallel to each axis of the transfer roll 3 and the receiving jig 4, so that the size of the molded product can be adjusted. It is adapted to be moved according to the direction and fixed by a device not shown.

In addition, in order to swing the above-mentioned rotary table 11 alternately left and right about the pivot shaft 13, the piston rod 25 of the air cylinder 24 set in the machine frame 12 is connected to the connecting plate 26 of the rotary table 11. It is done rather than being. This connecting plate 26 is pivotally supported 27 on the rotary table 11.

Now, the transfer sheet 1 is stretched between the paper feeding section and the winding section of the rotating table 11 as shown in the third figure.
, and the transfer roll 3 is also replaced accordingly. Then, in accordance with the tapered shape, the shaft 4a can be adjusted by using the inclination adjustment device shown in FIG. Adjust the inclination with the device marked. In this case, the contact generatrix between the receiving jig 4 and the transfer roll 3 is horizontal. Furthermore, the transfer position of the moving plate 12a is determined according to the size of the molded product b, and the movement is adjusted using the device shown in FIGS. 4 and 5 to change the position of the pivot shaft 13, and the swing angle θ is adjusted.
Adjust in advance. The speed of the air cylinder 24 is adjusted accordingly, and the fan-shaped pattern a
The raising and lowering of the air cylinder 8 is adjusted by a timer so that only the length of the central locus C-- _C1 can be transferred.

Next, when the switch (start button) is turned on, the timer is activated and the transfer roll 3 is lowered, and the electromagnetic clutch 22 is activated to start feeding the transfer sheet 1, and the air cylinder 24 is also activated to start the transfer.

To explain the basic principle shown in FIG. 1 with respect to the transfer device shown in FIGS. 3 and 4, the transfer start position A-A ₁ at the end of the fan-shaped print a on the transfer sheet 1 is
When the transfer roll 3 and the molded product b on the receiving jig 4 are in contact with each other as shown in the figure, that is, above the pivot shaft 13 in FIG. 4, the piston rod 25 of the air cylinder 24 on the machine frame 12 is in the contracted state Atsushi, turntable 1
1 rotates around the pivot shaft 13 toward the cylinder 24 side, and when the transfer starts by rotating the transfer roll 3 and winding one transfer sheet onto the take-up reel 17 side by the motor 21, the Then, the piston rod 25 of the air cylinder 24 starts to extend, and the transfer is performed along the center locus C, _C1 line,
When the transfer reaches its end position B-- _B1 , the piston rod 25 has just reached the end of its extension.

Air cylinder 8 that raises and lowers the transfer roll 3
and an air cylinder 24 that swings the turntable 11.
The air cylinder 8 continues to operate for a time set in advance on a timer, and when the molded product b makes one revolution, the air cylinder 8 stops operating, the transfer roll 3 is raised by the spring 10 and stops, and the air cylinder 24 is moved to the turntable 11.
Make one round trip and then stop.

Then, the detector 15 detects the mark 2 on the transfer sheet 1.
When detected, the electromagnetic clutch 22 is disengaged and feeding of the transfer sheet is stopped.

When the transfer to the transfer sheet is completed, the molded product b is taken out from the receiver jig 4, a new molded product b is attached to the receiver jig 4, and the switch is turned on again.The above operations are repeated and the transferred product is transferred. It is.

Since the mark 2 is applied to each pitch, it is correctly transferred from the starting edge of the pattern.

In any case, the present invention allows the transfer sheet to pass between the molded product set in the receiving jig and the transfer roll, while the feeding section and winding section of the transfer sheet are adjusted to the tapered shape of the molded product. Since the image is transferred by moving it along a trajectory, when a switch is turned on, the image is automatically transferred without slipping, and it is characterized by being able to transfer without wrinkles.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the principle of the present invention. FIG. 2 is an explanatory diagram showing the relationship between the transfer roll and the receiving jig. FIG. 3 is a simplified front view of the device of the present invention. FIG. 4 is a simplified plan view of the apparatus of the present invention, with the transfer section omitted.
FIG. 5 is a schematic side view of the movable platen 12a. FIG. 6 is a perspective view of the tilt adjustment device. DESCRIPTION OF SYMBOLS 1... Transfer sheet, 3... Transfer roll, 4... Receiving jig, 11... Turntable, 13... Pivot shaft, 14... Paper feed reel, 15... Detector, 19, 20... Feed roll,
17... Take-up reel, 21... Motor, 22... Electromagnetic clutch, 24... Air cylinder, 25... Piston rod, 26... Connection plate.

Claims (1)

[Claims] 1. For setting a transfer roll that is rotatably and vertically movable with respect to the machine frame and has the same external shape as the molded product, and a molded product that rotates in contact with the transfer roll via a transfer sheet. A receiving jig is provided, as well as a paper feeding section and a winding section for the transfer sheet, and the transfer roll swings from side to side about a pivot point relative to the machine frame under the center axis, and the swing angle determines the development of the molded product. A rotary table determined by the operation of an air cylinder on the machine frame that is adjusted according to the fan-shaped opening angle shown in the figure, and a detector provided on the rotary table to detect marks made one pitch at a time on the transfer sheet. and,
A timer is activated by input from a switch and a motor for driving the winding unit installed on the rotary table to directly connect the motor and the winding unit after a certain period of time, and when the detector detects a mark on the transfer sheet, the motor is activated. A transfer device is provided with an electromagnetic clutch that separates the winding section from the winding section, and an air cylinder device installed in the machine frame that swings the rotary table back and forth, which operates for a certain period of time when a timer is activated by input from a switch.