JP2008257303A - Transfer film feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer film feeding device for preventing slack of a transfer film with a simple structure. <P>SOLUTION: This transfer film feeding device 1 compares the amount of films of a feeding roll 3 of the transfer film 2 with the amount of films of a take-up roll 5 of the transfer film. Based on the comparison result, a speed difference to control the tension of the transfer film is provided between the rotating speed of the feeding roll 3 and the rotating speed of the take-up roll 5, and tension of the transfer film is controlled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transfer film feeding apparatus capable of shortening a longitudinal feeding time.

  Japanese Patent No. 3211185 (Japanese Patent Laid-Open No. 11-175157) discloses a basic configuration of a transfer film feeding apparatus. In this apparatus, the take-up roll that winds up the transfer film drawn out from the feed-side roll of the transfer film is rotated by a vertical feed motor. A vertical mark for position detection is provided on the transfer film. When the vertical mark detection sensor detects this vertical mark, the vertical feed motor driving device pre-sets the vertical feed motor so that the transfer pattern of the transfer film stops at a predetermined stop position between the movable platen and the mold. It drives according to the defined speed command pattern and rotates the winding side roll intermittently. In the conventional speed command pattern, the vertical feed motor is rotated at a high speed from the stopped state, and the vertical mark detection sensor detects the presence of the vertical mark during the detection state, and the vertical speed is lower than the high speed. The feed motor is rotated, and then the vertical feed motor is stopped as soon as the vertical mark detection sensor enters a non-detection state where the presence of the vertical mark is not detected.

In the conventional apparatus, when the amount of the transfer film taken up by the take-up roll increases, the tension applied to the transfer film changes, and the transfer film tends to be slack. Therefore, in the conventional apparatus, fluctuations in tension are suppressed by using a potentiometer for measuring the tension of the transfer film and a powder clutch whose braking force is adjusted so that the tension is constant.
Japanese Patent No. 3211185 (Japanese Patent Laid-Open No. 11-175157)

  However, adjusting the braking force of the powder clutch requires skill, and if maintenance is not performed on a regular basis, the adjustment will be lost and the tension will fluctuate. There was a problem that disappeared.

  An object of the present invention is to provide a transfer fill feeding device that can prevent the occurrence of slack in a transfer film with a simple configuration.

  The transfer film feeding device of the present invention compares the film amount of the transfer-side roll of the transfer film with the film amount of the take-up-side roll of the transfer film, and based on the comparison result, the rotation speed of the feed-side roll and the winding amount are wound. The transfer film tension is controlled by giving a speed difference for controlling the tension of the transfer film between the rotation speed of the take-off roll. Therefore, according to the present invention, the film amount of the feeding side roll and the film amount of the winding side roll of the transfer film are monitored, and the transfer film can be easily loosened only by controlling the tension based on the monitoring result. Can be prevented.

  In the transfer film feeding apparatus that more specifically embodies the present invention, the transfer film feed side roll, the roll holding apparatus that holds the transfer film feed side roll rotatably, and the transfer film feed side roll are drawn out. A winding side roll for winding the transfer film, a vertical feed motor for rotating the winding side roll, a vertical mark detection sensor for detecting a vertical mark, and a vertical feed motor drive device for controlling the driving of the vertical feed motor. I have. Here, the transfer-side roll of the transfer film means that a plurality of transfer patterns are formed at predetermined intervals in the longitudinal direction, and a plurality of vertical marks for detecting the position of the transfer pattern are a plurality of transfer patterns and a predetermined position. A transfer film formed with a predetermined interval in the longitudinal direction with a relationship is wound around.

  The vertical feed motor drive device uses the output of the vertical mark detection sensor as a position detection signal, and sets the vertical feed motor in advance so that the transfer pattern of the transfer film stops at a predetermined stop position between the movable platen and the mold. It is configured to drive according to a defined speed command pattern to intermittently rotate the winding side roll. In the speed command pattern, the vertical feed motor is rotated at a high speed from the stop state, and the vertical mark detection sensor detects the presence of the vertical mark, and the vertical feed is performed at a low speed lower than the high speed. The motor is rotated, and then the vertical feed motor is stopped as soon as the vertical mark detection sensor enters a non-detection state where the presence of the vertical mark is not detected.

  When the transfer film feeding device is specifically implemented, it outputs a speed reduction signal when it is determined that the transfer speed of the transfer film is higher than a predetermined speed when the vertical feed motor is rotating at a high speed. The apparatus further comprises a situation determination means for The roll holding device includes a braking device that applies braking to the rotation of the transfer-side roll of the transfer film after the speed reduction signal is output. In this specific transfer film feeding device, the transfer film when the longitudinal feed motor is rotating at a high speed is compared with the film amount of the transfer side roll of the transfer film and the film amount of the take-up side roll of the transfer film. Execute based on the moving speed. In other words, when the vertical feed motor is rotating at a high speed, the transfer film moves more than a predetermined speed when the amount of film on the take-up roll is greater than that on the feed roll. Thus, when the transfer film stops, it means that the transfer film is in a slack situation. Therefore, in a specific transfer film feeding device, when such a situation is judged by the situation judging means, the braking device applies a braking force to the rotation of the transfer film feed-side roll, thereby controlling the transfer film tension. The difference is given to the rotation speed of the feeding side roll and the rotation speed of the winding side roll. When braking is applied to the rotation of the feed side roll by the braking device in this way, the speed when the vertical feed motor rotates at a high speed and at a low speed decreases as a whole and stops. Even in such a case, a speed difference that causes the transfer film to loosen does not occur.

  The roll holding mechanism for the feed side roll includes a rotating shaft on which the transfer side roll of the transfer film is held. As the braking device, an electric brake that electrically applies braking to the rotation of the rotating shaft when the speed reduction signal is output can be used. The electric brake is easy to control and has a fast response speed, so that tension control can be reliably performed.

  In order to control the tension of the transfer film when the situation determination means outputs a speed reduction signal, the longitudinal feed motor driving device can be configured as follows in order to give the aforementioned speed difference. . That is, the longitudinal feed motor driving device is provided with a first speed command pattern that is used until a speed reduction signal is output, and a second speed command pattern that is used after the speed reduction signal is output. do. Then, the second speed command pattern is a speed command pattern in which the high speed is reduced so that the moving speed of the transfer film does not exceed a predetermined speed until winding of the transfer film is completely completed. That is, by using the second speed command pattern, a transfer film tension control is performed by giving a speed difference for controlling the transfer film tension between the rotation speed of the feed-side roll and the rotation speed of the take-up roll. . In this way, it is not necessary to prepare a special device for braking.

  Further, as the situation determination means, the above situation is based on the film diameter dimension of the transfer film wound around the transfer-side roll of the transfer film and / or the film diameter dimension of the transfer film wound around the take-up-side roll. What determines whether or not can be used. When this situation determination means is used, the film amount of the transfer-side roll of the transfer film can be directly compared with the film amount of the take-up-side roll of the transfer film. When using this situation determination means, when the film diameter dimension of the transfer film wound around the transfer-side roll of the transfer film is smaller than the film diameter dimension of the transfer film wound around the winding-side roll, You may make it determine with it being in the condition of this. In this way, since the determination criteria are simple, tension control can be easily performed.

  Further, the situation determination means includes a rotation amount accumulation storage means for accumulating the rotation amount of the longitudinal feed motor and storing the accumulated rotation amount, and the accumulated rotation amount stored in the rotation amount accumulation storage means is set to a predetermined reference accumulated rotation amount. When it reaches, the thing provided with the integral rotation amount determination means which determines with being in the above-mentioned situation may be used. That is, in this situation determination means, the film amount of the transfer-side roll of the transfer film and the film amount of the take-up-side roll of the transfer film are compared by the accumulated rotation amount of the vertical feed motor. If an encoder that detects the rotational position of the rotary shaft is attached to the vertical feed motor, the accumulated rotation amount can be calculated easily using the output of the encoder, etc. There is no need to prepare a special structure.

  Further, the situation determination means includes a speed detection means for measuring the moving speed of the transfer film, and a speed reduction signal for outputting the speed reduction signal after detecting that the speed detected by the speed detection means is equal to or higher than a predetermined speed. You may comprise from a generating means. This is because the transfer film speed increases as the film take-up diameter of the take-up roll increases, so even by looking at the transfer film speed, the transfer film feed-side roll film amount and transfer film take-up This is because it can be compared with the film amount of the side roll.

  According to the present invention, the amount of film on the feed roll and the amount of film on the take-up roll of the transfer film are monitored, and by simply controlling the tension based on the monitoring results, the occurrence of slack in the transfer film can be easily prevented. can do.

  Embodiments of a transfer film feeding device of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a view schematically showing a configuration of a main part of an example of an embodiment of a transfer film feeding device of the present invention used in a transfer device. The transfer film feeding device 1 is pulled out from the feed side roll 3 around which the transfer film 2 is wound, the roll holding device 4 that rotatably holds the feed side roll 3 of the transfer film 2, and the feed side roll 3 of the transfer film 2. The winding side roll 5 for winding the transferred transfer film 2, the vertical feed motor 6 for rotating the winding side roll 5, the vertical mark detection sensor 7 for detecting the vertical mark, and the drive of the vertical feed motor 6 are controlled. And a vertical feed motor driving device 8. The transfer film 2 is guided by guide roller mechanisms 9 and 10 each composed of a pair of roller members. The roll holding device 4 includes a rotating shaft 12 that rotatably supports the feed-side roll 3. An electric brake 13 used as a braking device is provided for the rotating shaft 12, and the electric brake 13 brakes the rotation of the rotating shaft 12 based on a braking command from the braking circuit 14. A speed reduction signal is input from the situation determination means 15 to the braking circuit 14. The situation determination means 15 includes a detection signal from the first diameter measuring sensor 16 that measures the film diameter R1 of the transfer film 2 wound around the feed-side roll 3 of the transfer film 2, and the winding-side roll 5 And a detection signal from the second diameter measuring sensor 17 for measuring the film diameter R2 of the transfer film 2 wound around the film. The first and second diameter measuring sensors 16 and 17 are respectively contact bars 16a and 17a that come into contact with the outer peripheral surface of the transfer film wound around the feeding side roll 3 and the winding side roll 5, and contact bars 16a and 16a. It comprises signal conversion units 16b and 17b that convert the inclination angle of 17a into an electrical signal and output it. In FIG. 1, the transfer film 2 passes between the movable platen 18 and the mold 19. A product to be transferred (not shown) is attached to the mold 19. Then, the transfer film 2 (P in FIG. 2) is transferred to the movable platen 18 by pressing the transfer film 2 onto the surface of the product to be transferred. Although not shown in FIG. 1, an upper lateral movement motor that moves the transfer film 2 in the lateral direction at a position above the movable platen 18 and the mold 19, and a position below the movable platen 18 and the mold 19. And a lower horizontal movement motor that moves the transfer film 2 in the horizontal direction. In the transfer device, a vertical feed motor 6, an upper horizontal movement motor (not shown), and a lower horizontal movement motor are set to feed and position the transfer film 2.

  As shown in FIG. 2, a plurality of transfer patterns P are formed on the transfer film 2 at predetermined intervals in the longitudinal direction. A plurality of vertical marks m for detecting the position of the transfer pattern P are provided at one edge portion of the transfer film 2 with a predetermined positional relationship with the plurality of transfer patterns P at a predetermined interval in the longitudinal direction. Is formed. The vertical mark m is read by the vertical mark detection sensor 7. The vertical mark detection sensor 7 is an optical reading sensor that optically reads the front end position FE and the rear end position RE of the vertical mark m. In addition, a lateral mark n used for determining the lateral position of the transfer film 2 is continuously formed in the longitudinal direction on the other edge of the transfer film 2.

  The vertical feed motor driving device 8 uses the output of the vertical mark detection sensor 7 as a position detection signal so that the transfer pattern P of the transfer film 2 stops at a predetermined stop position between the movable platen 18 and the mold 19. The vertical feed motor 6 is driven in accordance with a predetermined speed command pattern SP to rotate the winding side roll 5 intermittently. The speed command pattern used here is a pattern as shown in FIG. 5 (A) or (B). In the speed command pattern SP, the vertical feed motor 6 is rotated at a high speed from the stopped state (period T1), and the period T2 in the detection state in which the vertical mark detection sensor 7 detects the presence of the vertical mark m is high. The vertical feed motor is rotated at a low speed lower than the speed, and then the vertical feed motor is stopped as soon as the vertical mark detection sensor 7 enters a non-detection state where the presence of the vertical mark m is not detected.

  Returning to FIG. 1, when the situation determination means 15 determines that the movement speed of the transfer film 2 when the longitudinal feed motor 6 is rotating at a high speed is greater than or equal to a predetermined speed, the braking circuit 14 outputs a speed reduction signal. Then, after a speed reduction signal is output from the situation determination means 15 to the electric brake 13 as a braking device, braking is applied to the rotation of the feed side roll 3 of the transfer film 2. That is, the tension applied to the transfer film is increased by applying braking to the rotating shaft 12 of the feed-side roll 3 to increase the load of the longitudinal feed motor 6 and consequently reducing the speed of the transfer film 2. If the vertical feeding speed of the transfer film 2 is increased more than necessary, if the time until the stop is the same, the transfer film is sent out too much when the transfer film is stopped, and becomes loose. Therefore, in this example, when the situation determination means 15 determines that the moving speed of the transfer film 2 when the longitudinal feed motor 6 rotates at a high speed is equal to or higher than a predetermined speed, the braking circuit 14 The longitudinal feed speed is reduced by outputting a braking command from the motor and operating the electric brake. In the present embodiment, the transfer when the longitudinal feed motor 6 is rotating at a high speed from the comparison between the film amount of the feed-side roll 3 of the transfer film 2 and the film amount of the take-up roll 5 of the transfer film 2. The situation judging means 15 judges that the situation where the moving speed of the film 2 is equal to or higher than a predetermined speed is made.

  Therefore, in the present embodiment, the first and second diameter measurement sensors 16 and 17 determine the film amount of the transfer side roll 3 of the transfer film 2 and the film amount of the take-up side roll 5 of the transfer film 2 with the contact bar 16a. And a tilt angle of 17a. That is, when the tilt angle is large, it can be detected that the film amount is large and the radius of the film wound around the roll is large. When the tilt angle is small, it can be detected that the film amount is small and the radius of the film wound around the roll is small. As shown in FIGS. 3A and 3B, the inclination angles θ1 and θ2 of the contact bars 16a and 17a are converted into electric signals by the signal conversion units 16b and 17b and input to the situation determination unit 15. The fact that the moving speed of the transfer film 2 when the vertical feed motor 6 is rotating at a high speed is greater than or equal to a predetermined speed is that the film amount of the take-up roll 5 is equal to the feed roll 3. This means that the transfer film 2 is loosened when the transfer film 2 is stopped. Therefore, in this transfer film feeding apparatus, such a situation is judged by the situation judging means 15 based on the outputs of the first and second diameter measuring sensors 16 and 17. As an example, the radius R1 (inclination angle θ1) of the film of the feed-side roll 3 detected by the first radial dimension measuring sensor 16 is the film radius of the film of the winding-side roll 5 detected by the second radial dimension measuring sensor 17. When the longitudinal feed motor 6 is rotating at a high speed, the moving speed of the transfer film 2 is greater than or equal to a predetermined speed because the radius R2 (inclination angle θ2) has become smaller (FIG. 3C). It is determined that a situation occurs. How much the radius R1 (or the inclination angle θ1) is smaller than the radius R2 (or the inclination angle θ2) is used as a judgment criterion in consideration of the rotational speed of the vertical feed motor 6, the material of the transfer film, and the like. It will be determined as appropriate.

  In the present embodiment, the electric brake 13 as a braking device applies a brake to the rotation of the rotary shaft 12 of the transfer film feed-side roll 3 to thereby control the speed difference for controlling the tension of the transfer film 2 on the feed side. The rotation speed of the roll 3 and the rotation speed of the winding side roll 5 are given. As described above, when braking is applied to the rotation of the feed-side roll 3 by the braking device, the speed when the longitudinal feed motor 6 rotates at a high speed and at a low speed decreases as a whole. Even when stopped, a speed difference that causes the transfer film 2 to sag does not occur. That is, the tension is controlled.

  FIG. 4 is a flowchart showing an algorithm of one vertical feed operation in an example of a program used when the drive control of the vertical feed motor 6 by the vertical feed motor driving device 8 is performed using a microcomputer. In this example, in order to make the vertical feeding of the transfer film 2 as fast as possible, high speed movement is performed, and then low speed movement is performed. In particular, when high-speed movement is executed, the braking operation for tension control in the present embodiment is effective. In this algorithm, first, in step ST1, the transfer film is moved at a first speed (approximately 360 mm / sec) according to the speed command pattern. When the transfer film moves to a predetermined deceleration command point (step ST2), the speed is changed from the first speed to the second speed (approximately 70 mm / sec) (steps ST3 and ST4). The determination of the deceleration command point can be made based on the output of the encoder as the rotational position detection mounted on the rotation shaft of the motor in order to control the vertical feed motor. When the high speed movement is changed in step ST3, the transfer film is then moved at a low speed according to the speed command pattern (step ST4). When the vertical transfer of the transfer film moves to a low speed movement, detection of the front end FE of the vertical mark m (so-called marking) by the vertical mark detection sensor 7 is started (step ST5). When the front end FE of the vertical mark m (marking) is detected in step ST6, the transfer film 2 is further lowered in speed in step ST7. In step ST8, detection of the rear end RE of the vertical mark m (so-called marking) is started. When the rear end RE of the vertical mark m (marking) is detected in step ST9, the vertical feed is stopped in step ST10.

  In the above embodiment, the electric brake 14 gives a speed difference for controlling the tension of the transfer film 2 between the rotation speed of the feed-side roll 3 and the rotation speed of the winding-side roll 5. However, the method for generating the above-described speed difference in order to perform the tension control of the transfer film when the situation determination unit 15 outputs the speed reduction signal is not limited to the above embodiment. For example, the longitudinal feed motor driving device 8 may be configured as follows. In other words, the first speed command pattern that is used until the speed reduction signal is output from the situation determination means 15 and the second speed command pattern that is used after the speed reduction signal is output. It is comprised as provided with. That is, when the speed reduction signal is output, the speed command pattern to be used is changed from the first speed command pattern to the second speed command pattern. FIGS. 5A and 5B show examples of the first speed command pattern and the second speed command pattern. In this example, the second speed command pattern [FIG. 5B] is applied at a high speed so that the moving speed of the transfer film 2 does not exceed a predetermined speed until the winding of the transfer film 2 is completely completed. However, the speed command pattern is reduced from the high speed of the first speed command pattern [FIG. 5A]. That is, when the amount of the film on the feed side roll 3 is decreasing, the transfer film is used between the rotation speed of the feed side roll 3 and the rotation speed of the winding side roll 5 by using the second speed command pattern. It becomes possible to control the tension of the transfer film by giving a speed difference for controlling the tension of 2. In this way, it is not necessary to prepare a special device for braking.

  Moreover, as the situation determination means 15, you may use a thing as shown to FIG. 6 (A). In this situation determination means 15, the rotation amount of the longitudinal feed motor 6 is detected by the encoder 21, the rotation amount is integrated by the rotation amount integration storage means 22, and the integrated rotation amount is stored. When the accumulated rotation amount stored in the rotation amount accumulation storage unit 22 reaches a predetermined reference accumulated rotation amount, the accumulated rotation amount determination unit 23 rotates the above-described situation (that is, the longitudinal feed motor 6 rotates at a high speed. It is determined that there is a situation in which the transfer speed of the transfer film is at or above a predetermined speed. In response to this determination result, the speed reduction signal generator 24 outputs a speed reduction signal. That is, the situation determination means 15 having such a configuration compares the film amount of the transfer-side roll 3 of the transfer film 2 with the film amount of the take-up-side roll 5 of the transfer film 2 by the accumulated rotation amount of the vertical feed motor 6. Do.

  Further, as shown in FIG. 6 (B), the situation determination means 15 includes a speed detecting means 31 for measuring the moving speed of the transfer film, and whether or not the moving speed detected by the speed detecting means 31 is equal to or higher than a predetermined speed. And a speed reduction signal generating means 33 for outputting a speed reduction signal thereafter when the speed judgment means 32 detects that the moving speed of the transfer film exceeds a predetermined speed. May be. This is because the speed of the transfer film 2 increases as the film take-up diameter of the take-up roll 5 increases, so that the film amount of the feed roll 3 of the transfer film 2 can also be determined by looking at the speed of the transfer film 2. This is because the transfer film can be compared with the film amount of the winding side roll 5.

  The constituent requirements of various inventions disclosed in this specification and the drawings will be listed below.

(1) A plurality of transfer patterns are formed at predetermined intervals in the longitudinal direction, and a plurality of vertical marks for detecting the positions of the transfer patterns have a predetermined positional relationship with the plurality of transfer patterns. A transfer-side roll of a transfer film formed by winding a transfer film formed at a predetermined interval in the direction;
A roll holding device for rotatably holding the transfer-side roll of the transfer film;
A take-up roll that winds up the transfer film drawn from the feed roll of the transfer film;
A longitudinal feed motor for rotating the winding side roll;
A vertical mark detection sensor for detecting the vertical mark;
The vertical feed motor is set at a predetermined speed so that the transfer pattern of the transfer film stops at a predetermined stop position between the movable platen and the mold using the output of the vertical mark detection sensor as a position detection signal. A longitudinal feed motor driving device that drives according to the command pattern and rotates the winding side roll intermittently;
The period in which the speed command pattern is in a detection state in which the vertical feed motor is rotated at a high speed from a stopped state and the vertical mark detection sensor detects the presence of the vertical mark is lower than the high speed. A transfer film feeding device configured to rotate the longitudinal feed motor at a speed and then stop the longitudinal feed motor as soon as the longitudinal mark detection sensor enters a non-detection state where the presence of the longitudinal mark is not detected; There,
When it is determined that the moving speed of the transfer film when the vertical feed motor is rotating at the high speed is in a situation where the moving speed is equal to or higher than a predetermined speed, the apparatus further includes a situation determination means that outputs a speed reduction signal.
The transfer film feeding device, wherein the roll holding device includes a braking device that applies braking to the rotation of the feed-side roll of the transfer film after the speed reduction signal is output.

(2) The roll holding mechanism includes a rotating shaft that holds the transfer-side roll of the transfer film, and the braking device outputs the speed reduction signal with respect to the rotation of the rotating shaft. The transfer film feeding device according to (1), wherein the transfer film feeding device is an electric brake that sometimes electrically applies the braking.

(3) A plurality of transfer patterns are formed at predetermined intervals in the longitudinal direction, and a plurality of vertical marks for detecting the positions of the transfer patterns have a predetermined positional relationship with the plurality of transfer patterns. A transfer-side roll of a transfer film formed by winding a transfer film formed at a predetermined interval in the direction;
A take-up roll that winds up the transfer film drawn from the feed roll of the transfer film;
A longitudinal feed motor for rotating the winding side roll;
A vertical mark detection sensor for detecting the vertical mark;
The vertical feed motor is set at a predetermined speed so that the transfer pattern of the transfer film stops at a predetermined stop position between the movable platen and the mold using the output of the vertical mark detection sensor as a position detection signal. A longitudinal feed motor driving device that drives according to the command pattern and rotates the winding side roll intermittently;
The period in which the speed command pattern is in a detection state in which the vertical feed motor is rotated at a high speed from a stopped state and the vertical mark detection sensor detects the presence of the vertical mark is lower than the high speed. A transfer film feeding device configured to rotate the longitudinal feed motor at a speed and then stop the longitudinal feed motor as soon as the longitudinal mark detection sensor enters a non-detection state where the presence of the longitudinal mark is not detected; There,
When it is determined that the moving speed of the transfer film when the vertical feed motor is rotating at the high speed is in a situation where the moving speed is equal to or higher than a predetermined speed, the apparatus further includes a situation determination means that outputs a speed reduction signal.
The vertical feed motor driving device includes a first speed command pattern that is used until the speed reduction signal is output, and a second speed command pattern that is used after the speed reduction signal is output. And the second speed command pattern is a speed command in which the high speed is reduced so that the moving speed of the transfer film does not exceed the predetermined speed until winding of the transfer film is completely completed. A transfer film feeding device characterized by being a pattern.

(4) The situation determination means is based on the film diameter of the transfer film wound around the transfer-side roll of the transfer film and / or the film diameter of the transfer film wound around the take-up-side roll. The transfer film feeding apparatus according to (1) or (3), wherein it is determined whether or not the situation is present.

(5) In the situation determination unit, the film diameter size of the transfer film wound around the transfer-side roll of the transfer film is smaller than the film diameter size of the transfer film wound around the winding-side roll. If it becomes, it will determine with being in the said condition, The transfer film feeding apparatus as described in said (4) characterized by the above-mentioned.

(6) The state determination means is configured to determine in advance a rotation amount accumulation storage means for accumulating the rotation amount of the vertical feed motor and storing the accumulated rotation amount, and the accumulated rotation amount stored in the rotation amount accumulation storage means. The transfer film feeding device according to (1) or (3), further comprising: an integrated rotation amount determination unit that determines that the state is in the above-described state when the reference integrated rotation amount is reached.

(7) The state determination means detects a speed detecting means for measuring the moving speed of the transfer film, and detects that the speed detected by the speed detecting means is equal to or higher than the predetermined speed. The transfer film feeding apparatus according to (1) or (3), comprising speed reduction signal generating means for outputting a signal.

It is a figure which shows roughly the structure of the principal part of an example of embodiment of the transfer film feeding apparatus of this invention used in a transfer apparatus. It is a figure which shows an example of the pattern on a transfer fill. (A) thru | or (C) is a figure used in order to demonstrate the measurement condition using a diameter measurement sensor. It is a flowchart which shows the algorithm of one vertical feed operation in an example of the program used when drive control of the vertical feed motor by a vertical feed motor drive device is implemented using a microcomputer. (A) And (B) is a figure which shows the example of the 1st and 2nd speed command pattern. (A) And (B) is a block diagram which shows a different structure of a condition determination means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer film feed device 2 Transfer film 3 Feed side roll 4 Roll holding device 5 Winding side roll 6 Vertical feed motor 7 Vertical mark detection sensor 8 Vertical feed motor drive device 9, 10 Guide roller mechanism 12 Rotating shaft 13 Electric brake 14 Braking circuit 15 Situation determining means 16 First diameter measurement sensor 17 Second diameter measurement sensor

Claims (1)

A transfer film feeder,
The film amount of the transfer side roll of the transfer film is compared with the film amount of the take-up side roll of the transfer film,
Based on the comparison result, the transfer film tension is controlled by giving a speed difference for controlling the tension of the transfer film between the rotation speed of the feed-side roll and the rotation speed of the winding-side roll. A transfer film feeder characterized by that.

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