CN1221700A - Device for adjusting tension applied to sheet - Google Patents

Device for adjusting tension applied to sheet Download PDF

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Publication number
CN1221700A
CN1221700A CN 98124656 CN98124656A CN1221700A CN 1221700 A CN1221700 A CN 1221700A CN 98124656 CN98124656 CN 98124656 CN 98124656 A CN98124656 A CN 98124656A CN 1221700 A CN1221700 A CN 1221700A
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CN
China
Prior art keywords
thin slice
sensor
paper
sheet
paper bowl
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Granted
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CN 98124656
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Chinese (zh)
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CN1200864C (en
Inventor
汤山正二
能势博
安永五男
江藤直道
天野弘和
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Yuyama Manufacturing Co Ltd
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Yuyama Manufacturing Co Ltd
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Priority claimed from JP9257175A external-priority patent/JP2909450B2/en
Application filed by Yuyama Manufacturing Co Ltd filed Critical Yuyama Manufacturing Co Ltd
Publication of CN1221700A publication Critical patent/CN1221700A/en
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Publication of CN1200864C publication Critical patent/CN1200864C/en
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    • 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

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  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

In order to preventing disalignment of the edges of a folded sheet by smoothly feeding the sheet to a packaging unit while keeping tension fluctuations to a minimum when the sheet is unwound from a paper roll set in a paper feed unit even though the paper roll diameter decreases gradually as the sheet is unwound. A sheet length measuring sensor or rotary encoder is provided in the paper feed path through which the packaging sheet is fed toward the packaging unit. An angle sensor is provided which includes Hall element sensors provided on a support shaft and magnets provided on a core pipe of the paper roll. Any change in the signals from one of these sensors relative to the signal from the other sensor is used to calculate the paper roll winding length, and the sheet tension is adjusted to an optimum, constant level by controlling the sheet braking force stepwise according to the roll diameter measured by the sensors.

Description

A kind of adjusting puts on the device of the tension force on the thin slice
The present invention relates to the device that a kind of adjusting puts on the tension force on the thin slice, thin slice wherein is drawn out from rolls of sheets gradually according to the rolls of sheets diameter variation.
A kind of traditional medicine packaging apparatus comprises a sheet feeding apparatus and a sealing arrangement, and wherein the sheet feeding apparatus rotatably support the rolls of sheets that the hot melt bag changes paper; Sealing arrangement is arranged in the feeding passage, and packing laminate sheet passes through this feeding passage by unwinding and feeding.In the upstream of sealing arrangement, thin slice is converted into half, feeding medicine simultaneously, make thin slice at the sealed device heat seal in edge, Width upper edge with the sealing medicine.
When packing laminate sheet is used up, a new paper roll is installed in the cardboard feed arrangement, this new paper roll is by unwinding and feeding.When the feeding thin slice, in order because of the inaccuracy of thin slice is folding sealing station to be departed from, thin slice equably must stretch.In fact, the tension force that puts on the thin slice is changing gradually, this be because when the diameter of thin slice paper roll during by unwinding in change gradually.
The Japanese Utility Model 1-36832 that has examined discloses a kind of web tensions control apparatus, even this device also can apply uniform tension force to thin slice when the vary in diameter of rolls of sheets.The disclosed web tensions control apparatus of this publication has a reel bearing support cylinder, and this bearing support cylinder is detachably being fixed rolls of sheets.Several drum diameter detecting sensors are set on the side of rolls of sheets.The signal that comes from these detecting sensors is used to control the electromagnetic force that is produced by magnet stopper, thereby makes braking force with the reducing and progressively reduce of drum diameter, and wherein magnet stopper is arranged in the roll support cylinder.
In this traditional web tensions control apparatus, the length of thin slice changes along with the unwinding of thin slice on the reel, and its length can be detected gradually by the drum diameter sensor that is arranged on the drum diameter direction.Like this, when drum diameter is reduced to the point that the order of magnitude of detecting sensor changes, the braking force order of magnitude of magnet stopper also can be at revolution because the weight of the skew of the axis of center shaft, thin slice or coiling load and fluctuation up and down.
If this thing happens.Chip edge just can not be converted into accurately centering of a half at thin slice so.So just complete packing can not be arranged.Because the order of magnitude steep variation of braking force, therefore, thin slice will be subjected to tearing on the Width.
There is a problem in the light reflection sensor: promptly easier to be malfunctioning.The packing laminate sheet that is used for medicine packaging apparatus comprises semi-translucent or the transparent hot melt paper and the paper of many other kinds.If the end position of such thin slice changes, light will differently be reflected so, so just can not detect the signal light that is reflected.Will reduce accuracy of detection like this.In addition, will be crooked under the influence that humidity changes.Because can making, uneven end face detects the accuracy rate reduction.
The heat-sensitive type typewriter is typically provided with thin slice by the upstream position of folded in half with the printing packing laminate sheet.If the thin slice vibration, print point will shoal so, perhaps reduces the durability of stump indicator lamp.
Except that this problem, the most important thing is to run out or because excessive braking force provides a kind of function that detects sheet tears when thin slice is ruptured when a volume thin slice, prevent that the various devices with tension-adjusting gear from quitting work, eliminate waste of time, and prevent to influence tension adjustment work itself.But traditional tension-adjusting gear does not have such function.
An object of the present invention is to provide a kind of web tensions control apparatus, this device can apply a suitable tension force to the feeding of paper according to the diameter of paper roll (the ultra-thin thin slice of reeling on it) partially stabilizedly, this can realize by each step is set braking force, do not change and can not make selected braking force produce magnitude gradually owing to the influence of the slight variation of reel diameter, thereby be easy to process thin slice, and can deal with the breakage problem of thin slice.
According to the present invention, a kind of web tensions control apparatus is provided, be used to regulate from being fixed in paper bobbin on the reel bearing support cylinder to the tension force of the thin slice of thin slice treating stations feeding, bearing support cylinder wherein is fixed on the bolster rotationally; This control apparatus comprises: brake equipment, be used to apply a braking force, and this brake equipment engages with the reel bearing support cylinder; One angular transducer is used to detect the corner of reel bearing support cylinder; One sheet length sensor is used to be determined on the thin slice feeding passage feeding length to the thin slice of thin slice treating stations feeding; With a control setup, this control setup comprises: a tension-adjusting gear, be used on the basis of sheet length that arbitrary sensor is measured or corner, calculating the length or the diameter of present thin slice, or the diameter of reel, and according to the diameter of reel in each step by regulating the vdc that progressively and consistently puts on the brake equipment braking force of control brake device, thereby regulate tension force to the thin slice of thin slice treating stations feeding; With a thin slice damage detection device, be used on one of sheet length sensor and angular transducer or whole basis that whether produces signal, judge whether thin slice is damaged.
In this web tensions control apparatus, adopt two kinds of sensors, i.e. sheet length sensor and angular transducer.When receiving the detection signal that comes from these two kinds of sensors, the change of coiling amount can be directly obtain from the signal of a sensor changes, and a scheduled volume that uses another sensor as a reference.
Predetermined variation range by making reel length in advance produces with the variation of drum diameter and links, and just can select the controlling level step by step of braking force by the variation of detection reel length simply.Like this, just can be according to the diameter control brake power of reel, thereby in each stage with the tension adjustment of thin slice to optimum level.
Like this, each level of braking force all changes to smaller value from higher value within the specific limits, when braking force changes step by step, changes can the wafer processes process not exerted an influence owing to the variation of tension force in such scope.In traditional device, promptly under the situation that the winding diameter of paper roll is directly detected by sensor, each rank of braking force can be near because inhomogeneous coiling change the diameter place of braking force rank variation rapidly, and there is not this problem in device of the present invention.
In addition, when the signal that comes from two sensors (promptly coming from the signal of sheet length sensor and angular transducer) when being transfused to control setup, whether whether thin slice has broken exists the judgment means of the signal that comes from these two sensors to judge by detecting, and this judgment means is separated with the tension adjustment operation.Based on the result who judges, perhaps the feeding of thin slice is stopped, and perhaps tension-adjusting gear is stopped.
Further feature of the present invention and purpose will be from following referring to becoming clear, wherein the description of the drawings:
Fig. 1 is the partial view of packing device of the form feeder of a packaging facilities;
Fig. 2 is the vertical sectional view of form feeder, is fixing a coil paper on this device;
Fig. 3 is the block scheme of control circuit that is used for the tension-adjusting gear of packing laminate sheet;
Fig. 4 is VI-lateral plan of paper-advance unit when the VI direction of arrow is watched from Fig. 2;
Fig. 5 is V-lateral plan of paper-advance unit when the V direction of arrow is watched from Fig. 2;
Fig. 6 is the scheme drawing of angular transducer;
Fig. 7 A-7D is the scheme drawing of dissimilar angular transducer;
Fig. 8 A and 8B are the view of the basic function of displaying tension-adjusting gear;
Fig. 9 is for showing the diagram of circuit of special function mode;
Figure 10 is for showing the diagram of circuit of conventional function mode;
Figure 11 is a diagram of curves, expresses the vdc that applied in the particular form operation and the relation between the coiling length;
It is how to detect slip that Figure 12 shows the slippage detecting sensor;
Figure 13 is a diagram of circuit, detects the function of thin slice breakage in order to explanation;
Figure 14 is a chart, how to use the signal that comes from sensor in order to explanation.
With reference to accompanying drawing, will make an explanation to embodiments of the invention.Fig. 1 is the scheme drawing of a medicament packing machine, mainly expresses a paper-advance unit and a packing device.Paper-advance unit has a bolster 1, is fixing a base pipe P on this axle rotationally.The board rolls R of drug packaging cardboard S is reeling on this base pipe P.Thin slice S unwinding on the roll R, and be fed into packing device by feeding running roller 2,3.
In this packing device, thin slice vertically is converted into two halves by a triangular plate 4.Medicine falls in the space of folding thin slice formation.Then, thin slice by with the heating running roller 6 of beam bear at Width along dual-side spacing one predetermined space heat seal.This packing device comprises many other parts, for only showing main parts for simplicity.
Fig. 2 is the partial vertical sectional view of paper-advance unit, is provided with roll R and base pipe P in this paper-advance unit.As shown in the figure, bolster 1 comprises the axle 1c of a center shaft 1a, an outer shaft 1b and a hollow, wherein the end of center shaft 1a is fixed on the back plate 11 by a nut, outer shaft 1b is around the center shaft overall fixed, quill shaft 1c is fixed on the outer shaft 1b by bearing 12, and bearing 12 is provided with near the two ends of outer shaft 1b.
Center shaft 1a at one end has one outshot 13.Outer shaft 1b has a flange 14 at same end.Quill shaft 1c has a flange 15 at the other end.The relative bolster 1 with roll R of base pipe P that is fixed on the quill shaft 1c turns.Several magnet 16 are arranged on the interior perimeter surface of flange 15 with suitable spacing.Along ferromagnet 17 is set on the circumference of base pipe P end face.Magnet 16 attracts ferromagnet 17 detachably base pipe P and roll R are fixed on the quill shaft K.
By suitably tensionings, motor brake 20 engages with quill shaft 1c the packing laminate sheet S of unwinding by motor brake 20 on the roll R.The motor brake 20 that is fixed on the back plate 11 is connected on the wheel word 21 by the belt conveyor (not shown).This wheel word 21 has an output shaft, is fixing a small transmission gear 22 on this output shaft, this gear 22 be arranged at flange 15 outside the lip-deep big gear wheel 23 of edge be meshed.Like this, by excitation motor brake 20 braking force is put on the quill shaft 1c.
Motor brake 20 is a small-sized alternating current dynamo by direct voltage drive.As described below, according to by the tension force on the packing laminate sheet S of unwinding, braking force can change at four-stage, and the variation of this braking force can realize by the vdc that change puts on four-stage.
As shown in Figure 3, control setup 30 receives the signal that comes from rotary angle transmitter parts and thin slice displacement pickup, and these rotary angle transmitter parts comprise magnet 24 and four hall element sensors 25, and the thin slice displacement pickup comprises a proximity switches 26 and outshot 27.
Specifically, based on the sheet length sensor signal of first embodiment and the signal of rotary angle transmitter, control setup accurately calculates the length of the thin slice S of unwinding on the roll R, and regulates braking force corresponding to reel R diameter variation, puts on tension force on the thin slice with adjusting.
As shown in Figure 6, the axis of four magnet 24 surrounding tube P of second embodiment is on 67.5 ° of interior perimeter surface that are arranged at base pipe P, and the axis of four hall element sensor 25 surrounding tube P is on 90 ° of ends that are arranged at bolster 1.
But the number of positions of magnet 24 and sensor 25 is not limited to situation shown in Figure 6.Fig. 7 shows the quantity of these parts and some variations of setting.In each version, when base pipe P rotated 22.5 °, hall element sensor or sensor 25 can produce an impulse singla.
In addition, substitute the combination of magnet 24 and Hall element 25, also can adopt the rotation of light sensors base pipe P.Such optical sensor comprises light-emitting diode and light cutting device, and this optical sensor is fixed in the end of bolster 1 (outer shaft 1b) as Hall element 25.
Such optical sensor can also be fixed on the prolongation or permanent seat of the flange end that is arranged at outer shaft 1b, and outshot is arranged on the base pipe P with 22.5 ° space, so that pass through between the light-emitting diode of optical sensor and light cutting device.The number of optical sensor and outshot is identical with the quantity of hall element sensor 25 and magnet 24.
Fig. 3 schematically shows to be used to control from paper-advance unit and supplies with packing laminate sheet and pack the block scheme of circuit of each several part parts of the device of medicine.Its control setup 30 receives the signal that comes from end sensor 31, come from the signal that is arranged near the rotation decoder 32 the feeding roller 3 and come from the signal that is fixed on the rotative speed meter on the motor 6a output shaft, and wherein motor 6a and one of heating roller 6 spool is meshed; And based on above-mentioned a kind of signal.Produce the output of excitation motor brake 20 or motor 6a.Input media that is used for incoming external data of sequence number 34 expressions.
The lateral plan of Fig. 5 for watching along the direction of the arrow VI-VI among Fig. 2, the position of mainly expressing the displacement detecting sensor that is used for packing laminate sheet.In this embodiment, a proximity switches 26 is arranged on the back plate 11.16 juts 27 are arranged on the flange 15 of hollow rotatable axle 1c of bolster 1.
If at the detected rotary angle transmitter signal and have pitch difference between the detected signal by displacement detecting sensor by hall element sensor, control setup will determine to exist displacement so.
In this medicine packaging apparatus, when regulating the tension force of thin slice in the following manner, medicine is packaged.
In the present embodiment, the maximum diameter d of the paper bowl R on the paper-advance unit MaxWith minimum diameter d 0All be known in advance.As shown in Figure 8, the braking force that motor brake 20 produces changes at four-stage according to coming from the signal that rotates decoder 32, thereby by regulating braking force thin slice is applied a suitable tension force according to the diameter of the variation of paper bowl R.
Graphic its maximum diameter d of paper bowl R Max=160mm, minimum diameter d Mo=64mm, the thickness of press board are r=30 μ m.Like this, the braking force that is produced by motor brake just changes once when the diameter of paper bowl R whenever reduces (160-64)/4=24mm.
The length L of the thin slice of the reel R of formation given diameter is provided by following formula:
L=[(d 0+2×γ)+(d 0+2×2γ)+…+(d 0+2×(n-1)γ
+(d 0+2×nγ)]π=[nd 0+2(1+2+…+n-1+n)γ]π = [ n d 0 + 2 × n ( n + 1 ) 2 γ ] π =[d 0+ (n+1) γ)] n π ... (1) diameter of (wherein n is the number of turns) paper bowl R is provided by following formula: d Max=d 0+ 2 * n γ ... (2)
From formula (1), when the paper bowl diameter is maxim, form the sheet length L of paper bowl R MaxFor:
L max=[64×n+n(n+1)×30n×10 -3]π
From formula (2), d Max=64+2 * 30n * 10 -3=160 (mm)
Like this, n=96/9 * 10 -2=1600
Therefore, L Max=(64+1601 * 30 * 10 -3) * 1600 π
=562,688(m)
Diameter range with paper bowl is divided into four-stage now: N=1 (maximum), 2 (second largest), 3 (the third-largest) and 4 (minimums).The maximum sheet length of each stage paper bowl is provided by following formula:
During N=1, L Max=562,688 (m), (n=1600, d Max=160)
During N=2, L Max=376,800 (m), (n=1200, d Max=136)
During N=3, L Max=221,056 (m), (n=800, d Max=112)
During N=4, L Max=95,456 (m), (n=400, d Max=88)
At Fig. 8 A, among the 8B, for ease of the explanation of running, magnet 24 is different from the above embodiments with the number and the setting of hall element sensor 25.But it operates substantially is identical: promptly revolution produces an impulse singla for moving 22.5 °.
Shown in Fig. 8 A, when packing laminate sheet unwinding length 1, if the radius of paper bowl is big, then angular transducer produces pulse seldom, and when the paper bowl radius reduced, shown in Fig. 8 B, the number of pulse increased.The number of pulse is respectively 3 and 10 when the paper bowl radius is maxim and minimum value, the pulse number scope of 3-10 is divided into four-stage and regulates braking force to apply a DC current, and this DC current can apply suitable tension force corresponding to each stage of motor brake 20.
Between above-mentioned tension level N=1-4 and pulse number, there is following relation.The minimum and maximum diameter of supposing paper bowl R is respectively 1600mm and 64mm, and so when the paper bowl diameter is maxim, the sheet length of unwinding will be π * 160mm from the paper bowl.Because angular transducer 25 revolutions moving 22.5 ℃ (16 pulses of every circle) produce an impulse singla, so thin slice is by unwinding π * 160/16=314m/m.When unwinding length was 3140m/m, pulse number was 10.
When the paper bowl diameter for hour, have following relation between the sheet length of unwinding and the pulse number.That is, because π * 64/16=129.5m/m, when unwinding length is 3140mm, pulse number will be 3140/1295 * 10=24.2.
The pulse number of each tension level N and vdc are determined as follows:
Tension level N pulse number vdc
N=1 10-13 25V
N=2 14-17 16V
N=3 18-21 12V
N=4 22-24.2 8V
In the above description, tension level N can be regulated according to the pulse number of given thin slice unwinding length.When producing the pulse of predetermined number, tension level can be determined based on unwinding length.The more specific description of this method is as follows:
Fig. 9 and 10 is the diagram of circuit that shows the running of tension-adjusting gear.Specifically, Fig. 9 is the diagram of circuit of the particular form of carrying out before the usual manner of tension-adjusting gear.Figure 10 is the diagram of circuit of common mode.
Under particular form shown in Figure 9, control setup is checked the various conditions of normal packaging operation in the packing device, thereby can successfully carry out normal manner of packing.Before normal packing running, packing laminate sheet must be arranged in the packing device rightly.Packing laminate sheet manually is provided with by index(ing) feed usually.Mode is this special mode.
In step S0, control setup determines whether present mode is particular form.If that satisfies following condition starts particular form, i.e. end sensor or the excitation of connecting airtight and index(ing) feed mode or the counter-rotational detection of coiling linear transducer first.When a paper bowl runs out and new paper bowl is mounted and connect airtight when being connected with the fwd thin slice and be energized.
Before all operations begin, can start intermittent mode by opening control setup, and with above-mentioned mode manual installation packing laminate sheet.
This special operation scheme is necessary, and this is because be not that new complete paper bowl always is set, and also the paper bowl of using may be installed, and for example has half paper bowl of new paper bowl diameter.If the paper bowl of being adorned only has new paper bowl diameter half, tension force is transferred to a by-level at first so, and the tension force of this level is less than the tension force corresponding to new paper bowl diameter.
If in step S0, present mode is judged as particular form, and tension force just is set at maxim in step SS1 so, and encourages various sensors (reference sensor, tachometer generator, coiling sensor, base pipe slippage sensor) (step SS2).Like this, packing laminate sheet is by manual feeding and come from the sheet length sensor or rotation decoder 32, and the signal of angular transducer or hall element sensor 25 is by feeding gradually.
In step SS5, control setup uses above-mentioned formula to calculate length based on the paper bowl of these signals, to determine whether paper bowl has maximum gauge, for example half of maximum gauge.If this is impossible (NO), execution in step SS3 so again.If possible, control setup determines in step SS7 whether the condition that enters particular form is more all eliminated so.Eliminate if determine condition, tension force is adjusted to suitable level in step SS8 so.Step SS9 and SS10 are for being used for inspection center's pipe out-of-position step, and this will be described hereinafter.
In the tension adjustment stages of step SS8, corresponding to the vdc of maximum tension, when having maximum gauge (new paper bowl), paper bowl is set at 25v, if the diameter of paper bowl is about maximum gauge one half, voltage is set at 20v; To prevent the sudden change of tension force.
When tension force was transferred to a proper level, program turned back to step S0, to determine whether to implement the running of particular form again.At this moment, program proceeds to conventional operation mode [A].
Under conventional operation mode shown in Figure 10, the index(ing) feed mode switch is by manual switchover.Next in step S1, read the data of previous setting, and make various sensors start (S2).At this moment, the conventional operation of packing device is started.When conventional operation started, tension force was controlled in the DC current values that is fit to be arranged under the special operation scheme.
Then in step S3, S4 and S5, the length signals of thin slice is transfused to work as the identical mode of specific run mode with the signal of angular transducer, to calculate the sheet length of paper bowl.This calculating is undertaken by above-mentioned mode substantially.As result calculated, be unworn, a complete paper roll if paper bowl R shows, vdc is in the same manner as in the first embodiment according at step S6 so, S8, the judgement among S10 and the S12 is at step S7, S9, be set to 25V, 16V, 12V or 8V among S11 or the S13 respectively.Figure 11 shows the relation between above-mentioned coiling length and vdc control.
After finishing the control of tension force by one of above-mentioned route, based on the signal that is derived from proximity switches 26, control setup judges whether base pipe slides in step S14.As shown in Figure 5, switch 26 relative 16 ferromagnet juts are provided with, and just produce an impulse singla whenever base pipe rotates 22.5 °, and the mode of its mode and Hall element angular transducer 25 generation impulse singlas is identical.
In these embodiments, angular transducer 25 and 26 is different type, but they also can be the sensors of same type.The time schedule of Figure 12 has illustrated by the impulse singla of angular transducer generation and the relation between corner.As shown in the figure, the impulse singla that is produced by the slippage detecting sensor can obtain synchronously with the impulse singla that is produced by coiling length detection sensor, unless the coiling condition is with tension variation.
But if the rotational resistance of the motor brake 20 that is produced by above-mentioned each vdc is improper, for example, if the tension force of tension level N=2 is too big, paper bowl R will acutely rotate with base pipe P so.This will make magnet body 17 be changed by the position that magnet 16 attracts.If this thing happens, although hall element sensor 25 keeps producing impulse singla every 22.5 ° so, proximity switches 26 will produce two impulse singlas simultaneously, and when base pipe is rotated further 22.5 °, just can not produce a signal.
Figure 12 shows when generation is moved in such position, the situation how impulse singla changes.As shown in the figure, after base pipe rotated a whole circle, the slippage detecting sensor can not produce impulse singla at position C and D.On the contrary, between D and A, produced impulse singla with having certain displacement.
In this case, control setup can be judged the slippage detecting sensor with reference to the signal that comes from coiling length detection sensor and not produce pulse position at position C.For example, if when horizontal N=2, the DC current of 16V is just too big, thereby makes tensile force too big, and voltage should be reduced to 14V tensile force is transferred to suitable level so.Judge owing to have this voltage, can any desired location after the D of position produce an impulse singla.
After moved any position of regulating the base pipe P that produces owing to the variation of thin slice tensile force, at step S16, whether control setup still was wound on the pipe P based on the signal detection cardboard that is derived from end sensor 31.If sensor 31 does not still detect the terminal of cardboard, so just carry out the running of step S3, promptly the coiling length according to paper bowl is controlled the tensile force of thin slice by repeating aforementioned calculation.
When end sensor 31 detected the terminal of packing laminate sheet S, the tensile force controllable function finished.If be necessary after this or need continuous packing, program turns back to particular form so, with a new paper bowl replacement reel R and connect the end of thin slice.
Step SS9 and SS10 are shown by dashed lines in the diagram of circuit of particular form, and this just means that these steps are not main.If these steps are set, the step S14 in the slippage detecting operation under its effect and the conventional function mode so, S15 is identical.
Above-mentioned explanation is to make under hypothesis paper bowl R is the situation of paper bowl of a full volume.If will be about half paper bowl of maximum radius is installed on the paper-advance unit, in special operation scheme, tension force transferred to be slightly larger than full volume in the usual manner operational process paper bowl by unwinding to the tension force of one of maximum gauge half, the conventional operation mode is started.So just may start the conventional operation mode smoothly, and the rapid rising that can not produce tension force.
In the explanation of above embodiment, we have described the sensor module that comprises proximity switches 26 and projection 27, and they are used for the relative quill shaft K of detector tube P " slippage " as a sensor.This sensor module can be used as the substitute of the sensor module that is used as angle detecting sensor that comprises magnet 24 and hall element sensor 25.
The preceding a kind of sensor module that comprises the jut 27 of proximity switches 26 is exported an impulse singla with the identical cycle of the angular detection of hall element sensor shown in Figure 12 25, as long as motor 20 does not apply abnormal braking force (for example because the fault of brake motor 20).Like this, just can be with this impulse singla as angle detection signal.
If proximity switches is used as angle detecting sensor, the hall element sensor that is used as angle detecting sensor so just there is no need, and it can be saved.Like this, the angular transducer that comprises proximity switches 26 not only serves as angular transducer but also be used as the slippage detecting sensor.For making this sensor, need a contrast signal as the slippage detecting sensor.This contrast signal can produce by rotating decoder 32.
If brake motor 20 has applied an abnormal braking force, if promptly motor 20 quits work, quill shaft K and flange 15 thereof will quit work so.Will between pipe P and flange 15, produce slippage like this.Even only be paper feed slightly this moment, rotate decoder 33 and also will produce a signal.Proximity switches 26 just can detect just relative flange 15 slips of pipe with the inconsistent fact of the impulse singla of proximity switches 26 according to the signal of decoder 33 like this.
In the above-described embodiment, angle detecting sensor, slippage detecting sensor and coiling length detection sensor (rotation decoder) all are used for determining winding diameter.But it may use the sensor some detect that thin slice is cut to be come.This function is of great use, because the thin slice tensile force control apparatus of each embodiment uses with medicine packaging apparatus, because excessive braking force puts on the thin slice or because the thin slice on one of foil roll runs out, the thin slice of feeding packing device is cut off.
In the above-described embodiment, rotate decoder 32 and determine feeding length.Based on detected feeding length, the sheet length that is wound on the paper bowl can be calculated.Based on the coiling length that is calculated like this, this length is the impulse singla of angle detecting sensor or hall element sensor 25, can calculate winding radius to regulate braking force.And the proximity switches 26 that " slippage " of base pipe P opposing flanges 15 can be used as the slippage detecting sensor detects.The signal that comes from these sensors also can be used to detect thin slice in the following manner and be cut off.The situation that the cut-out of thin slice is detected has two kinds.
Under first kind of situation, thin slice is cut off between paper bowl R and rotation decoder 32.In this case, angle detecting sensor (being hall element sensor 25) and slippage detecting sensor (being proximity switches) one or both of can not produce impulse singla, and rotate the length measurment signal that decoder 32 produces a thin slice feeding length.
In this case, control circuit 30 can determine that thin slice is cut off by the extention of program, and wherein the extention of program is used for determining that thin slice is cut off.Based on this judgement, control circuit 30 sends control signal the motor 6a of heating roller 6 to, so that roller 6 is out of service, and sends control signal to be used for transmitting medicine to packing device feed arrangement, to stop the supply of medicine.The cut situation of thin slice shows on the read out instrument (not shown).
In Fig. 3, show and rotate decoder 32 and be fixed on the axle of feeding paper bowl 3.Graphic running roller 3 is a pair of rollers that are used for the feeding thin slice, and thin slice is clipped between this pair roller.One of roller is by motor driven, and motor does not illustrate.Rotating decoder 32 is fixed on the axle of not driven another roller 3.Unshowned motor be used to heat the motor 6a of roller 6 by driven in synchronism.But also can save this motor, feeding roller 3 can be driven by motor 6a by belt.
Figure 13 shows the diagram of circuit of an embodiment, and this embodiment has the above-mentioned program of judging that thin slice has ruptured of being used to.As shown in the figure, step S17-S19 is inserted between the step S4 and S5 of diagram of circuit of Figure 10.In S17, judge the signal that obtains coming from sheet length sensor and angular transducer whether.If the data of obtaining, program proceeds to S5 so.
If but do not obtain data (NO), its time would be measured at S18 so.If in a preset time, do not obtain data, so just judge thin slice and rupture.Like this, a mis-information will be shown, and if desired, above-mentioned drive controlling can be stopped.When not obtaining such data, the state of sensor signal as shown in figure 14.Once more and the rotation subsequently for base pipe P, the state that no sensor signal is transfused to is illustrated.Said process is with a kind of situation is identical down.
Second kind of situation is the situation that does not at all have the feeding thin slice.In this case, in three detecting sensors, angle detecting sensor and slippage sensor one or both of and the thin slice feeding length sensor of being made up of rotation decoder 32 not produce signal, and revolution-meter as shown in Figure 3 can calculate the revolution signal.In this case, just can be cut off thereby judge thin slice by the shearing that provides determining program to detect thin slice.After judging that thin slice has been cut off, control identical with first kind of situation.
Rotating decoder 32 can be arranged on the axle of feeding roller 3 as shown in the figure.Or be arranged at the axle of the motor 6a that is used to heat roller 6.Determining program and above-mentioned two kinds of situations are identical.
If thin slice is cut off when one of above-mentioned two kinds of feelings, so just provide determining program to judge: if one of slippage detecting sensor and angle detecting sensor detection signal not, detected signal and rotate decoder 32 with revolution-meter 33, thin slice just is cut off so.It is identical with first kind of situation to judge that thin slice has been cut off control afterwards.
Present embodiment is applied in the device shown in Figure 2, and in this device, magnet 16 and ferromagnet 17 are arranged between the flange portion 15 of base pipe P and quill shaft 1c, thereby make base pipe P quill shaft 1c (flange 15) slippage relatively.But present embodiment also can be applicable in the following device, in this device, substitute this magnet fixing device, the jut of being made by single-piece magnet 16 and ferromagnet 17 is arranged on the flange portion 15 (or base pipe P), thereby base pipe P can not be slided along hand of rotation opposing flanges part 15.Base pipe P like this, just the slippage detecting sensor need not be set, because can not slide.
In this case, proximity switches 26 can be used as angle detecting sensor.That is this sensor or comprise that the angle detecting sensor of hall element sensor 25 can be used.In the present embodiment, even thin slice disconnects or feeding thin slice not at all midway, angle detecting sensor can not produce detection signal yet.Like this, be fixed on the axle of roller 3 or on the axle of motor 6a, determining program detects the cut fact of thin slice according to rotating decoder 32, determining program can be judged and rotate decoder 32 whether produce signal when revolution counter 33 produces signals.
Cutting sheet measuring ability by means of various sensors and determining program is essential at following this device: the feeding length of thin slice in this device, coiling length, the such data of winding diameter are temporarily stored in the memory device (RAM), when the feeding thin slice, install out of service and be closed, when restarting, ephemeral data disappears and can not be used.
Can wipe by net result being stored in electronics/read-only memory (ROM) (EEPROM) of program controlled in, judged result just can not be deleted when restarting, thereby this device is correctly restarted.
According to the present invention, according to the relative variation that comes from the signal of another sensor of the signal that comes from sheet length sensor and one of angular transducer, can determine coiling length and winding diameter, and select braking force to regulate the tensile force of thin slice according to diameter when front wheel.And, according to having or passive, detect the fracture of thin slice in the signal of sheet length sensor and angular transducer.In this device, even the length of reeling completely is unknown, also can be by selecting tensile force corresponding to the brake-power regulation thin slice of roller diameter, wherein roller diameter is corresponding to the current coiling length of determining according to take off data.So just can regulate the tensile force of thin slice smoothly, and the drastic change that can not produce tensile force.And the fracture of thin slice also can be measured.

Claims (9)

1. web tensions control apparatus, be used to regulate the web tensions that is fed into the thin slice treating stations from paper roll, wherein paper roll is fixed on the paper roll carrying cylinder, this carrying cylinder is fixed on the bolster rotationally, said device comprises: a brake equipment, this brake equipment engages with said paper roll carrying cylinder, is used to apply a braking force; An angular transducer is used to detect the rotational angle of paper roll carrying cylinder; One sheet length sensor is used to measure the thin slice feeding length that is fed to the thin slice treating stations from thin slice feeding passage; One control setup and a thin slice break detector apparatus, this control setup comprises a tension-adjusting gear, is used for calculating on the basis of sheet length that is gone out by arbitrary sensor determination or rotational angle the length or the diameter of present thin slice; The perhaps diameter of paper roll, and according to the diameter of paper web by regulating the vdc that puts on the said brake equipment consistently to control the braking force of said brake equipment step by step and in each stage (level), regulate the tension force on the thin slice of feeding thin slice treating stations, whether this thin slice break detector apparatus is used at one of said sheet length sensor and said angular transducer or all produces on the basis of electric signal judging whether thin slice ruptures.
2. according to the web tensions control apparatus of claim 1, it is characterized in that: said control setup comprises a kind of special mode, promptly when thin slice is fed, regulate before the general fashion of the tension force on the thin slice, based on the signal that comes from sheet length sensor and angular transducer in the mode identical with general fashion, calculate the coiling length of cardboard by intermittently running (promptly the thin slice of feeding one predetermined length) off and on, and based on the paper bowl diameter of calculating around length gauge by board rolls.In a usual manner the starting before, with brake-power regulation to a by-level, to regulate the tension force on the thin slice in advance.
3. according to the web tensions control apparatus of claim 1, it is characterized in that: inconsistent based between the signal of the signal of the angular transducer that comes from the corner of measuring the paper bowl carrying cylinder and the angular transducer that comes from mensuration paper bowl corner, any offset between paper bowl when control setup determines usual manner and/or particular form and the paper bowl carrying cylinder.The angular transducer that wherein is used to measure paper bowl carrying cylinder corner is arranged between the back plate of paper bowl carrying cylinder and bolster, the angular transducer that is used to measure the paper bowl corner is arranged between paper bowl and the bolster, and said paper bowl detachably is fixed on the paper bowl carrying cylinder.
4. according to the web tensions control apparatus of one of claim 1 to 3, it is characterized in that said sheet length sensor is a rotation decoder or a revolution counter.
5. according to the web tensions control apparatus of one of claim 1 to 3, it is characterized in that: said angular transducer comprises a hall element sensor and a magnet.
6. according to the described web tensions control apparatus of one of claim 1 to 3, it is characterized in that: said angular transducer comprises an optical sensor and an outshot.
7. web tensions control apparatus according to claim 5, it is characterized in that: said angular transducer comprises a hall element sensor or optical sensor and several magnet or outshot, perhaps several hall element sensors or optical sensor and magnet or outshot, thus in a whole circle, produce impulse singla in the angular interval of each five equilibrium.
8. according to the described web tensions control apparatus of one of claim 1 to 3, comprise a proximity switches and a ferromagnet.
9. according to any described web tensions control apparatus in the claim 5, it is characterized in that: said paper bowl is one to be wrapped in the cardboard on the base pipe, and said magnet or said outshot are arranged on the base pipe.
CN 98124656 1997-09-19 1998-09-18 Device for adjusting tension applied to sheet Expired - Fee Related CN1200864C (en)

Applications Claiming Priority (6)

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JP254891/97 1997-09-19
JP25489197 1997-09-19
JP254891/1997 1997-09-19
JP257175/1997 1997-09-22
JP9257175A JP2909450B2 (en) 1996-09-20 1997-09-22 Seat tension adjustment device
JP257175/97 1997-09-22

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CN 200410007097 Division CN100513283C (en) 1997-09-19 1998-09-18 Apparatus for regulating tension applied on thin sheet
CN200510137073.6A Division CN1789100B (en) 1997-09-19 1998-09-18 A hollow core pipe and combination of hollow core pipe with roll sheet

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CN1200864C CN1200864C (en) 2005-05-11

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CA2246982A1 (en) 1999-03-19
DE69810556D1 (en) 2003-02-13
EP0903311A1 (en) 1999-03-24
CN100513283C (en) 2009-07-15
CA2246982C (en) 2007-11-13
TW494081B (en) 2002-07-11
ES2189058T3 (en) 2003-07-01
DE69810556T2 (en) 2003-05-15
DK0903311T3 (en) 2003-04-22
EP0903311B1 (en) 2003-01-08
CN1200864C (en) 2005-05-11
PT903311E (en) 2003-04-30
CN1526629A (en) 2004-09-08

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