EP0903311A1 - Vorrichtung zur Spannungsregelung einer Bahn - Google Patents

Vorrichtung zur Spannungsregelung einer Bahn Download PDF

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Publication number
EP0903311A1
EP0903311A1 EP98117653A EP98117653A EP0903311A1 EP 0903311 A1 EP0903311 A1 EP 0903311A1 EP 98117653 A EP98117653 A EP 98117653A EP 98117653 A EP98117653 A EP 98117653A EP 0903311 A1 EP0903311 A1 EP 0903311A1
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EP
European Patent Office
Prior art keywords
sheet
roll
sensor
tension
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98117653A
Other languages
English (en)
French (fr)
Other versions
EP0903311B1 (de
Inventor
Shoji c/o K. K. Yuyama Seisakusho Yuyama
Hiroshi c/o K. K. Yuyama Seisakusho Nose
Itsuo c/o K. K. Yuyama Seisakusho Yasunaga
Naomichi c/o K. K. Yuyama Seisakusho Etou
Hiokazu c/o K. K. Yuyama Seisakusho Amano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yuyama Manufacturing Co Ltd
Original Assignee
Yuyama Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP9257175A external-priority patent/JP2909450B2/ja
Application filed by Yuyama Manufacturing Co Ltd filed Critical Yuyama Manufacturing Co Ltd
Publication of EP0903311A1 publication Critical patent/EP0903311A1/de
Application granted granted Critical
Publication of EP0903311B1 publication Critical patent/EP0903311B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/02—Supporting web roll
    • B65H16/04—Supporting web roll cantilever type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/005—Dispensers, i.e. machines for unwinding only parts of web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/063—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/16—Irregularities, e.g. protuberances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear

Definitions

  • This invention relates to a device for adjusting the tension applied to a sheet pulled out of a sheet roll in a stepwise manner according to the change in diameter of the sheet roll.
  • One conventional drug packaging device includes a sheet feed unit rotatably supporting a rolled sheet of heat-fusible packaging paper, and a sealing device provided in a feed path through which the packaging sheet is unwound and fed. Upstream of the sealing device, the sheet is folded in half, drugs are supplied, and the sheet is heat-sealed in the width direction and along the edges by the sealing device to seal the drugs.
  • Examined Japanese utility model publication 1-36832 discloses a sheet tension adjusting device which can apply uniform tension to the sheet even when the diameter of the sheet roll changes.
  • the sheet tension adjusting device disclosed in this publication has a roll support cylinder on which is detachably mounted a sheet roll.
  • a plurality of roll diameter detection sensors are provided at the side of the sheet roll. Signals from these detection sensors are used to control the electromagnetic force produced by an electromagnetic brake provided in the roll support cylinder so that the braking force decreases stepwise as the roll diameter decreases.
  • the length of the sheet on the roll which changes as the sheet is unwound, is detected stepwise by the roll diameter sensors arranged in the diametric direction of the roll.
  • the braking force rank of the electromagnetic brake will fluctuate up and down for every rotation due to deviation of the axis of the core shaft, the weight of the sheet, or winding strain.
  • the sheet edges cannot be aligned accurately when the sheet is folded in half. Complete packaging is thus impossible. Since the braking force rank changes sharply, the sheet may suffer a laceration in the width direction.
  • Light reflecting type detection sensors have a problem in that they are more likely to malfunction.
  • Packaging sheets used for a drug packaging device include semitransparent, or transparent heat-fusible paper and many other kinds of paper. If the end position of such a sheet changes, light is reflected differently, making it impossible to detect the reflected light as a signal. This deteriorates detecting accuracy. Further, it tends to meander under the influence of humidity variations. Detection accuracy may deteriorate due to uneven end faces.
  • a thermal printer is usually provided upstream of the position where the sheet is folded in half for printing the packaging sheet. If the sheet vibrates, its printing dots may chip, or the durability of a remainder indicator lamp may deteriorate.
  • An object of this invention is to provide a sheet tension adjusting device which can stably apply suitable tension to the paper feed portion according to the diameter of a paper roll around which is wound an ultra-thin sheet by setting a braking force for every step without producing level changes of the braking force selected in a stepwise manner due to the influence of slight change in the diameter of the paper roll, whereby sheets can e processed without any trouble, and which can cope with breakage of a sheet.
  • a sheet tension adjusting device for adjusting tension of a sheet fed from a paper roll mounted on a roll support cylinder rotatably mounted on a support shaft to a sheet processing station, the device comprising brake means engaging the roll support cylinder for applying a braking force, an angle sensor for detecting the rotation angle of the roll support cylinder, a sheet length sensor for measuring the feed length of the sheet on the sheet feed path to the sheet processing station, and a control unit comprising a tension adjusting unit for calculating the current sheet length or diameter or the diameter of the roll based on the sheet length or the rotation angle measured by either sensor, and adjusting the tension in the sheet being fed to the sheet processing station by adjusting a DC voltage applied to the broke means in a stepwise manner and constantly in each step according to the diameter of the roll to control the braking force of the brake means, and a sheet breakage detection unit for judging that the sheet has broken, based on whether or not one or both of the sheet length sensor and the angle sensor are producing signals.
  • this sheet tension adjusting device two sensors, i.e. the sheet length sensor and the angle sensor are used.
  • detection signals from the two sensors are received, a change in the amount of winding is directly obtainable from the change in the signal from one sensor while using a predetermined amount of the other sensor as a reference.
  • each rank of the braking force is changed over from a larger to a smaller value within such a range that there will be no trouble in sheet processing due to a change in tension when the braking force is changed in a stepwise manner.
  • each rank of the braking force tends to change sharply near the diameter where the rank of the braking force changes over due to uneven winding, the device of this invention is free of this problem.
  • the signals form the two sensors i.e. the sheet length sensor and the angle sensor are inputted into the control unit
  • the fact that the sheet has broken is judged by the judging unit based on whether or not there exist signals from the two sensors, separately from the operation for the tension adjustment. Based on the results of judgment, feed of the sheet is stopped, or the tension adjusting device is stopped.
  • Fig. 1 is a schematic diagram of a drug packaging machine, showing mainly a paper feed unit and a packaging unit.
  • the paper feed unit has a support shaft 1 on which is rotatably mounted a core pipe P on which is wound a roll R of a drug packaging paper sheet S.
  • the sheet S is unwound from the roll R, and fed through feed rollers 2, 3 to the packaging unit.
  • the sheet In the packaging unit, the sheet is longitudinally folded in half by a triangular plate 4. Drugs are dropped into the space defined in the folded sheet. The sheet is then heat-sealed widthwise and along both side edges at predetermined intervals by heating rollers 6 with perforators. While the packaging unit includes numerous other parts, only essential parts are shown for simplicity.
  • Fig. 2 is a partial vertical section of the paper feed unit in which the roll paper R and the core pipe P are set.
  • the support shaft 1 comprises a center shaft 1a having one end thereof fixed to a support plate 11 by a nut, an outer shaft 1b integrally mounted around the center shaft 1a, and a hollow shaft 1c rotatably mounted on the outer shaft 1b through bearings 12 provided near both ends of the outer shaft 1b.
  • the center shaft 1a has a shaft head 13 at one end.
  • the outer shaft 1b has a flange 14 at the same one end.
  • the hollow shaft 1c has a flange 15 at the other end.
  • the core pipe P and the roll paper R, mounted on the hollow shaft 1c, are rotatable relative to the support shaft 1.
  • a plurality of magnets 16 are provided on the inner peripheral surface of the flange 15 at suitable intervals.
  • Ferromagnetic (iron) members 17 are provided along the circumference of an end face of the core pipe P. The magnets 16 attract the ferromagnetic member 17 to detachably mount the core pipe P and the roll paper R on the hollow shaft 1c.
  • Packaging sheet S unwound from the roll paper R is suitably tensioned by a motor brake 20 engaging the hollow shaft 1c.
  • the motor brake 20, mounted on the support plate 11, is connected to a gear unit 21 through a transmission belt, not shown.
  • the gear unit 21 has an output shaft on which is mounted a pinion 22 in mesh with a large gear 23 provided on the outer peripheral surface of the flange 15.
  • braking force is applied to the hollow shaft 1c.
  • the motor brake 20 is a small AC motor powered by a DC voltage. As will be described below, braking force is variable in four stages according to the tension in the packaging sheet S being unwound by changing the DC voltage applied in four stages.
  • control unit 30 receives the signals from a rotary angle sensor assembly comprising four magnets 24 and four Hall element sensors 25, and a sheet displacement sensor comprising a proximity switch 26 and projections 27.
  • control unit accurately calculates the length of the sheet S unwound from the paper roll R based on the sheet length sensor signal of the first embodiment and the signal from the rotation angle sensor, and adjusts the braking force corresponding to the variation in diameter of the roll R to adjust the tension applied to the sheet.
  • the four magnets 24 of the second embodiment are provided on the inner peripheral surface of the core pipe P at angular intervals of 67.5° around the axis of the pipe P, while the four Hall element sensors 25 are provided at one end of the support shaft 1 at equal angular intervals of 90° around the axis of the pipe P.
  • the numbers and positions of magnets 24 and sensors 25 are however not limited to those shown in Fig. 6.
  • Fig. 7 shows some variations of their numbers and arrangement.
  • the Hall element sensor or sensors 25 produces a pulse signal every time the core pipe P rotates 22.5°.
  • photosensors may be used to detect the rotation of the core pipe P.
  • Such photosensors comprise light emitting diodes and light interceptors and are fixed to one end of the support shaft 1 (outer shaft 1b) as with the Hall elements 25.
  • photosensors are mounted on an extension or mounting seats provided on the flange end of the outer shaft 1b, while projections are provided on the core pipe P at angular intervals of 22.5° so as to pass between the light emitting diodes and the light interceptors of the photosensors.
  • the numbers of the photosensors and the projections are the same as the Hall element sensors 25 and the magnets 24.
  • Fig. 3 schematically shows a block diagram of a circuit for controlling various parts of the device for feeding packaging sheet from the paper feed unit and packaging drugs.
  • Its control unit 30 receives signals from an end sensor 31, those from a rotary encoder 32 provided near the feed rollers 3, and those from a revolving speed counter 33 mounted on the output shaft of a motor 6a coupled to the shaft of one of the heating rollers 6, and produces, based on one of the above signals, outputs for activating the motor brake 20 or the motor 6a.
  • Numeral 34 indicates an input unit for inputting external data.
  • Fig. 5 is a side view as viewed in the direction of arrow VI-VI of Fig. 2, and mainly shows the position of the displacement detection sensor for the packaging sheet.
  • a single proximity switch 26 is provided on the support plate 11.
  • Sixteen projections 27 are provided on the flange 15 of the rotatable hollow shaft 1c of the support shaft 1.
  • the control unit determines that there is a displacement.
  • drugs are packaged while adjusting the sheet tension in the following manner.
  • the maximum diameter d max and the minimum diameter d o of the roll paper R to be set in the paper feed unit are known beforehand.
  • braking force produced by the motor brake 20 is varied in four stages according to the signal from the rotary encoder 32 to apply suitable tension to the sheet by adjusting the braking force according to the changing diameter of the paper roll R.
  • the length L of the sheet forming a roll R of a given diameter is given by the following formula: (wherein n is the number of turns)
  • the angle sensor when the radius of the paper roll is large, the angle sensor produces fewer pulses while the packaging sheet is unwound by the length 1. As the paper roll radius decreases as shown in Fig. 8B, the number of pulses increases. If the pulse numbers when the paper roll radius is at its maximum and minimum is 3 and 10, respectively, the range of pulse numbers from 3-10 are divided into four stages so as to apply D/C currents that can apply suitable tension corresponding to the respective stages to the motor brake 20 to adjust the braking force.
  • the pulse number and the DC voltage for every tension level N are determined as follows:
  • the tension level N is adjusted according to the pulse number for a given unwound length of sheet. But the tension level may be determined based on the unwound length of sheet when a predetermined number of pulses have been produced. More detailed description of this method follows:
  • Figs. 9 and 10 are flowcharts showing the operation of the tension adjusting device. Specifically, Fig. 10 is a flowchart of a special mode to be carried out before the normal mode of the tension adjusting device. Fig. 10 is a flowchart of the normal mode.
  • the control unit checks various conditions for the normal packaging operations in the packaging unit so that the normal mode can be carried out smoothly.
  • packaging sheet Before the normal packaging operation, packaging sheet has to be correctly set in the packaging unit.
  • the packaging sheet is usually set manually by inching.
  • the control mode passes this special mode.
  • Step S0 the control unit determines if the current mode is the special mode.
  • the special mode starts if any one of the following conditions is met: i.e. the actuation of the end sensor or joint seal, and the detection of inching mode or reverse rotation of the winding length sensor.
  • the joint seal is activated while one paper roll has run out and a new roll is being set and spliced to the preceding sheet.
  • the inching mode starts by switching on the control unit before the start of all of the operations, and the packaging sheet is manually set in the above-described manner.
  • the special mode is necessary because a new, complete paper roll is not always set but there is the possibility that a used roll paper having e.g. half the diameter of a new roll may be set. If the roll set has only half the diameter of a new paper roll, the tension is initially adjusted to an intermediate level smaller than the tension corresponding to the diameter of the new roll.
  • Step S0 If the current mode is judged to be the special mode in Step S0, the tension is set at the maximum level in Step SS1, and various sensors (reference sensor, rotation number counter, winding length sensor, core pipe slip sensor) are activated (Step SS2). In this state, the packaging sheet is fed little by little by manual inching, and the signals from the sheet length sensor or rotary encoder 32, and the angle sensors or Hall element sensors 25.
  • Step SS5 the control unit calculates the sheet length of the paper roll based on these signals using the above-described formulas to determine whether the roll has the maximum diameter or not, e.g. half the maximum diameter. If this calculation is not possible (NO), Step SS3 is carried out again. If possible, the control unit determines in Step SS7 if the conditions for reentering the special mode are all removed. If they are, the tension is adjusted to a suitable level in Step SS8. Steps SS9 and SS10 are steps for detecting slipping of the core pipe, which will be described later.
  • a DC voltage corresponding to maximum tension is set at 25 V if the paper roll has a maximum diameter (new) and at about 20 V if the paper roll diameter is about half the maximum diameter to prevent any abrupt change in tension.
  • Steps S3, S4 and S5 the sheet length signal and angle sensor signal are inputted in the same manner as in the special mode to calculate the sheet length of the roll. This calculation is carried out substantially in the above-described manner. If, as a result of calculation, the roll R turns out to be an unused, full-volume roll, the DC voltage is set at 25 V, 16 V, 12 V or 8V in Step S7, S9, S11 or S13 according to the judgment in Steps S6, S8, S10 and S12, in the same way as in the first embodiment.
  • Fig. 11 shows the relationship between the above-described winding length and the DC voltage control.
  • the control unit determines if the core pipe is slipping in Step S14 based on the signal from the proximity switch 26. As shown in Fig. 5, the switch 26 is provided opposite to the 16 ferromagnetic projections, and produces a pulse signal every time the core pipe rotates 22.5° in exactly the same manner as the Hall element angle sensors 25.
  • the angle sensors 25 and 26 are different types, but they may be of the same type.
  • the time chart of Fig. 12 shows the relationship between the pulse signals produced by the angle sensors and the rotation angle. As shown, the pulse signals by the slip detection sensor can be obtained synchronously with the pulse signals by the winding length detecting sensor unless the winding condition changes with tension.
  • Fig. 12 shows how pulse signals change when such a position shift occurs.
  • the slip detection sensor fails to produce pulse signals at positions C and D after the core pipe has made a complete turn. Instead, pulse signals are produced between D and A with some displacement.
  • Step S16 After adjusting any position shift of the core pipe P due to sheet tension variation, the control unit checks in Step S16 if paper is still wound on the pipe P based the signal from the end sensor 31. If the sensor 31 has not yet detected the terminal end of the paper, the Step S3 operation is carried out, that is, the sheet tension is controlled according to the winding length of the paper roll by repeating the above calculations.
  • the tension control mode ends when the end sensor 31 detects the terminal end of the packaging sheet S. If it is necessary or desired to continuous packaging thereafter, the program returns to the special mode to replace the roll R with a new one and connect the sheet ends.
  • Steps SS9 and SS10 are shown by chain lines in the flow chart for the special mode, which means that these steps are not essential. If provided, though, their functions are the same as Steps S14, S15 in the slip detection operation in the normal mode.
  • the sensor assembly comprising the proximity switch 26 and projections 27 as a sensor for detecting "slip" of the pipe P relative to the hollow shaft K.
  • this sensor assembly may be used as a substitute for the sensor assembly comprising the magnets 24 and Hall element sensor 25 as an angle detector sensor.
  • the former sensor assembly comprising the proximity switch 26 and projections 27 keeps outputting a pulse signal at the same timing as the angle detection by the Hall element sensor 25 as shown in Fig. 12., as long as no abnormal braking force is applied from the motor 20 (due e.g. to failure of the braking motor 20). Thus, it is possible to use this pulse signal as an angle detection signal.
  • the Hall element sensor 25 which is used as an angle detection sensor, is unnecessary and can be omitted.
  • the angle sensor including the proximity switch 26 acts both as an angle sensor and a slip detection sensor.
  • a reference signal is needed. Such a reference signal can be provided by the rotary encoder 32.
  • the proximity switch 26 can detect that the pipe is slipping relative to the flange 15 from the fact that the pulse signal from the encoder 33 does not coincide with the pulse signal from the proximity switch 26.
  • the angle detection sensor, shift detection sensor and winding length detection sensor are all used to determine the diameter of the winding. But it is also possible to detect that the sheet has been cut, using some of these sensors. This function is useful because the sheet tension adjusting device of each embodiment is used with a drug packaging device, and a sheet fed to the packaging device may be cut due to an excessive braking force applied thereto or due to the fact that one of the sheet rolls has run out of sheet.
  • the feed length is detected by the rotary encoder 32. Based on the feed length detected, the sheet length wound on the roll is calculated. Based on the winding length thus calculated, which is a pulse signal of the angle detection sensor or Hall element sensor 25, a winding radius is calculated to adjust the braking force. Also, the "shift" of the core pipe P relative to the flange 15 is detected by the proximity switch 26 as a shift detection sensor. The signals from these sensors can also be used to detect that the sheet has been cut, in the following manner. There are two cases in which the cutting of the sheet is detected.
  • sheet is cut between the paper roll R and the rotary encoder 32.
  • the angle detection sensor which is the Hall element sensor 25 and the shift detection sensor, which is the proximity switch 26 is not producing pulse signals, while the rotary encoder 32 is producing a length measuring signal of the sheet feed length.
  • control circuit 30 can determine that the sheet has been cut by the addition of a program for determining that the sheet has been cut. Based on this judgment, the control circuit 30 transmits a control signal to the motor 6a of the heating rollers 6 to stop the rollers 6, and also transmits a control signal to the feed device for feeding drugs to the packaging device to stop the feed of drugs. The fact that the sheet has been cut is displayed on a display (not shown).
  • the rotary encoder 32 is shown to be mounted on the shaft of a feed roller 3.
  • the rollers 3 shown are a pair of rollers for feeding sheet by sandwiching it therebetween.
  • One of the rollers is driven by a motor, not shown.
  • the rotary encoder 32 is mounted on the shaft of the other roller 3 that is not driven.
  • the unillustrated motor is driven synchronously with the motor 6a for the heating rollers 6. But it may be omitted, and the feed rollers 3 may be driven by the motor 6a through a belt.
  • Fig. 13 shows a flowchart of an embodiment having the above-described program for judging that the sheet has broken. As shown, steps S17-S19 are inserted between Steps S4 and S5 of the flowchart of Fig. 10. In S17, it is judged whether or not signals from the sheet length sensor and the angle sensor have been obtained. If data are obtained, the program proceeds to S5.
  • the second case is the case where the sheet is not being fed at all.
  • the revolution number counter 33 shown in Fig. 3 can count the revolution number signal.
  • the control after the judgment that the sheet has been cut is the same as in the first case.
  • the rotary encoder 32 may be provided on the shaft of a feed roller 3 as shown, or on the shaft of the motor 6a for the heating rollers 6.
  • the judgment programs are exactly the same for both of the abovementioned two cases.
  • the judgment program is provided so as to judge that the sheet has been cut if no signal is detected by one or either of the shift detection sensor and the angle detection sensor, while signals are detected by both the rotary encoder 32 and the revolution number counter 33.
  • the control after the judgment that the sheet has been cut is the same as in the first case.
  • This embodiment is applied to the arrangement in which as shown in Fig. 2 the magnets 16 and ferromagnetic members 17 are provided between the core pipe P and the flange portion 15 of the hollow shaft 1c so that the core pipe P can shift relative to the hollow shaft 1c (flange 15).
  • this embodimeent is applicable to the arrangement, too, in which instead of such magnetic fixing means, protrusions made up of integral magnets 16 and ferromagnetic members 17 are provided on the flange portion 15 (or on the core pipe P) so that the core pipe P cannot shift in the rotational direction relative to the flange portion 15. In this case, no shift detection sensor is provided because the core pipe P does not shift.
  • the proximity sensor 26 can be used as an angle detection sensor.
  • this sensor or the angle detection sensor comprising the Hall element sensor 25 is used.
  • no detection signal is produced by the angle detection sensor.
  • the judgment program which judges that the rotary encoder 32 is or is not producing a signal while the rotation counter 33 is producing a signal.
  • the sheet cut detection function by means of various sensors and judgment program is necessary in a device of the type in which such data as the feed length of the sheet, winding length, winding diameter are temporarily stored in a memory (RAM), because if the device is stopped and turned off while sheet is being fed, interim data disappear and cannot be used at the restart.
  • RAM a memory
  • the current winding length of the roll and the winding diameter are determined based on the change in the signal from one of the sheet length sensor and the angle sensor relative to the signal from the other sensor, and the sheet tension is adjusted by selecting a braking force corresponding to the diameter.
  • breakage of the sheet can be detected from the presence or absence of the signals from the sheet length sensor and the angle sensor.
  • it is possible to adjust the sheet tension by selecting a braking force corresponding to the roll diameter corresponding to the current winding length determined based on the measurement data.
  • breakage of the sheet can be detected.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP19980117653 1997-09-19 1998-09-17 Vorrichtung zur Spannungsregelung einer Bahn Expired - Lifetime EP0903311B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP254891/97 1997-09-19
JP25489197 1997-09-19
JP25489197 1997-09-19
JP257175/97 1997-09-22
JP25717597 1997-09-22
JP9257175A JP2909450B2 (ja) 1996-09-20 1997-09-22 シート張力調整装置

Publications (2)

Publication Number Publication Date
EP0903311A1 true EP0903311A1 (de) 1999-03-24
EP0903311B1 EP0903311B1 (de) 2003-01-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980117653 Expired - Lifetime EP0903311B1 (de) 1997-09-19 1998-09-17 Vorrichtung zur Spannungsregelung einer Bahn

Country Status (8)

Country Link
EP (1) EP0903311B1 (de)
CN (2) CN1200864C (de)
CA (1) CA2246982C (de)
DE (1) DE69810556T2 (de)
DK (1) DK0903311T3 (de)
ES (1) ES2189058T3 (de)
PT (1) PT903311E (de)
TW (1) TW494081B (de)

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CN115447306A (zh) * 2022-08-23 2022-12-09 潘登 一种应用于建筑设计的专用绘图辅助工具
EP3999351A4 (de) * 2019-09-26 2023-06-14 Hewlett-Packard Development Company, L.P. Schlupfbestimmung für medienrolle

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EP2319768B1 (de) * 2008-07-24 2016-05-04 Yuyama Mfg. Co., Ltd. Dichtungsvorrichtung und pharmazeutische verpackungsvorrichtung
US9387624B2 (en) * 2010-06-09 2016-07-12 Yuyama Mfg. Co., Ltd. Medicine packing apparatus
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JP5806151B2 (ja) * 2012-03-13 2015-11-10 デクセリアルズ株式会社 接着フィルムの貼付方法及び接着フィルム貼付装置
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WO2019199339A1 (en) * 2018-04-12 2019-10-17 Pack Controls Llc System and method for the measurement of stretch film
EP3999351A4 (de) * 2019-09-26 2023-06-14 Hewlett-Packard Development Company, L.P. Schlupfbestimmung für medienrolle
CN113002143A (zh) * 2021-02-26 2021-06-22 重庆市金利药包材料有限公司 一种用于包装袋生产的双面印刷装置
CN113002143B (zh) * 2021-02-26 2022-08-26 重庆市金利药包材料有限公司 一种用于包装袋生产的双面印刷装置
CN115447306A (zh) * 2022-08-23 2022-12-09 潘登 一种应用于建筑设计的专用绘图辅助工具
CN115447306B (zh) * 2022-08-23 2024-04-09 陕西金叶榕建筑设计有限公司 一种应用于建筑设计的专用绘图辅助工具

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TW494081B (en) 2002-07-11
DK0903311T3 (da) 2003-04-22
DE69810556D1 (de) 2003-02-13
ES2189058T3 (es) 2003-07-01
DE69810556T2 (de) 2003-05-15
CA2246982C (en) 2007-11-13
CN1200864C (zh) 2005-05-11
PT903311E (pt) 2003-04-30
EP0903311B1 (de) 2003-01-08
CN1526629A (zh) 2004-09-08
CN1221700A (zh) 1999-07-07
CA2246982A1 (en) 1999-03-19

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