CN1789100B - A hollow core pipe and combination of hollow core pipe with roll sheet - Google Patents

Abstract

The invention provides a hollow core pipe, which comprises a hollow core pipe with a predetermined length for winding a paper roll sheet on the external periphery thereof; a magnet arranged inward from the internal periphery surface of the sheet material in the radial direction and at a certain angle, in order to be convenient to ensure an angular transducer arranged in a non-rotating central axle for supporting the hollow core pipe in a rotary way to calculate the winding length and the winding diameter of the paper roll, and the hollow core pipe can be rotated together with a hollow axle installed on the central axle in a rotary way. The invention also provides a combination of the hollow core pipe and the paper roll.

Description

The combination of a kind of hollow core tubes and a kind of hollow core tubes and paper roll

The application is in the division that on February 24th, 2004 submits to, application number is 200410007097.5, denomination of invention is the divisional application of " device that a kind of adjustment puts on the tension force on thin slice ".

Technical field

The present invention relates to the device that a kind of adjustment puts on the tension force on thin slice, thin slice is wherein drawn out from rolls of sheets gradually according to the change of rolls of sheets diameter.

Background technology

Traditional medicine packaging apparatus comprises a sheet feeding apparatus and a sealing arrangement, and wherein sheet feeding apparatus is rotatably supported the rolls of sheets of hot melt wrapper; Sealing arrangement is arranged in feeding passage, packing laminate sheet by this feeding passage by unwinding and feeding.In the upstream of sealing arrangement, thin slice is converted into half, simultaneously feeding medicine, make thin slice in the direction of the width along edge by sealing arrangement heat seal to seal medicine.

When packing laminate sheet is used up, in cardboard feed arrangement, install a new paper roll, this new paper roll is by unwinding and feeding.When feeding thin slice, in order to the inaccuracy not because of thin slice folds, sealing station is departed from, must stretch thin slice equably.In fact, tension force on thin slice is put on gradually in change, this is because when thin slice is being changed gradually by the diameter of paper roll during unwinding.

The Japanese Utility Model 1-36832 examined discloses a kind of web tensions control apparatus, even if this device also can apply uniform tension force to thin slice when the diameter change of rolls of sheets.Web tensions control apparatus disclosed in this publication has a reel bearing support cylinder, and this bearing support cylinder is detachably fixed wtih rolls of sheets.Several drum diameter detecting sensors are arranged on the side of rolls of sheets.The signal coming from these detecting sensors is used to the electromagnetic force controlling to be produced by magnet stopper, thus braking force is progressively reduced with the reduction of drum diameter, and wherein magnet stopper is arranged in roll support cylinder.

In this traditional web tensions control apparatus, on reel, the length of thin slice changes along with the unwinding of thin slice, and its length can be detected gradually by the drum diameter sensor be arranged on drum diameter direction.Like this, when drum diameter is reduced to the point of order of magnitude change of detecting sensor, the braking force order of magnitude of magnet stopper also can fluctuate often turning the skew of the axis due to center shaft, the weight of thin slice or winding load up and down.

If this thing happens.So chip edge just can not be converted into a half accurately centering at thin slice.So just can not there is complete packaging.Because the order of magnitude of braking force sharply changes, therefore, thin slice will be subject to tearing on Width.

There is a problem in light reflection sensor: namely more easily malfunctioning.Packing laminate sheet for medicine packaging apparatus comprises the paper of semi-translucent or transparent hot melt paper and other kinds many.If the end position of such thin slice changes, so light will differently be reflected, and so just can not detect signal by reflected light.Accuracy of detection will be reduced like this.In addition, will bend under the impact of humidity change.Because uneven end face can make detection accuracy rate reduce.

Heat-sensitive type typewriter is typically provided with the upstream position that thin slice is folded in half to print packing laminate sheet.If Chip Vibration, so print point will shoal, or reduces the durability of stump indicator lamp.

Except this problem, the most important thing is to run out when a volume thin slice or make due to excessive braking force during chip fracture, to provide a kind of function detecting sheet tears, prevent the various devices with tension-adjusting gear from quitting work, eliminate waste of time, and prevent from affecting tension adjustment work itself.But traditional tension-adjusting gear does not have such function.

Summary of the invention

An object of the present invention is to provide a kind of web tensions control apparatus, this device can according to the feeding of diameter to paper of paper roll (it wrapped around ultra-thin foil) partially stabilized apply a suitable tension force, this is by realizing each step setting braking force, and selected braking force can not be made magnitude change is produced gradually due to the impact of the slight change of reel diameter, thus be easy to process thin slice, and the breakage problem of thin slice can be dealt with.

According to the present invention, provide a kind of web tensions control apparatus, for regulating the tension force from the paper bobbin be fixed on reel bearing support cylinder to the thin slice of thin slice treating stations feeding, bearing support cylinder is wherein fixed on bolster rotationally; This control apparatus comprises: brake equipment, and for applying a braking force, this brake equipment engages with reel bearing support cylinder; One angular transducer, for detecting the corner of reel bearing support cylinder; One sheet length sensor, for being determined at the feeding length to the thin slice of thin slice treating stations feeding on thin slice feeding passage; With a control setup, this control setup comprises: a tension-adjusting gear, length or the diameter of current thin slice is calculated on the basis of the sheet length measured at arbitrary sensor or corner, or the diameter of reel, and in each step, control the braking force of brake equipment by regulating the vdc that progressively and consistently puts on brake equipment according to the diameter of reel, thus regulate the tension force to the thin slice of thin slice treating stations feeding; With a thin slice damage detection device, on one of sheet length sensor and angular transducer or the basis all whether producing signal, judge that whether thin slice is damaged.

Two kinds of sensors, i.e. sheet length sensor and angular transducer is adopted in this web tensions control apparatus.When receiving the detection signal coming from these two kinds of sensors, the change of winding amount can directly obtain from the signal intensity of a sensor, and the scheduled volume using another sensor as a reference.

Produced by the change of the predetermined variation range and drum diameter that make reel length in advance and link, just can be selected the gradual control level of braking force by the change of detection reel length simply.Like this, just can according to the diameter control braking force of reel, thus in each stage by the tension adjustment of thin slice to optimum level.

Like this, every one-level of braking force changes from higher value to smaller value all within the specific limits, when braking force changes step by step, changes and can not have an impact to wafer processes process due to the change of tension force in such scope.In traditional device, when namely the winding diameter of paper roll is by sensor direct-detection, each rank of braking force can change rapidly near the diameter place making braking force rank change due to uneven winding, and device of the present invention does not exist this problem.

In addition, when the signal (namely coming from the signal of sheet length sensor and angular transducer) coming from two sensors is transfused to control setup, whether thin slice has broken and to have judged by detecting the judgment means that whether there is the signal coming from these two sensors, and this judgment means operates with tension adjustment and is separated.Based on the result judged, or the feeding of thin slice is stopped, or tension-adjusting gear is stopped.

Accompanying drawing explanation

Further feature of the present invention and object will from following see becoming clear the description of the drawings, wherein:

Fig. 1 is the partial view of the packing device of the form feeder of a packaging facilities;

Fig. 2 is the vertical sectional view of form feeder, is fixed wtih a coil paper on the apparatus;

Fig. 3 is the block scheme of the control circuit of tension-adjusting gear for packing laminate sheet;

The lateral plan of paper-advance unit when Fig. 4 is VI-VI direction of arrow viewing from Fig. 2;

The lateral plan of paper-advance unit when Fig. 5 is V-V direction of arrow viewing from Fig. 2;

Fig. 6 is the schematic diagram of angular transducer;

Fig. 7 A-7D is the schematic diagram of dissimilar angular transducer;

Fig. 8 A and 8B is the view of the basic function showing tension-adjusting gear;

Fig. 9 is the diagram of circuit showing special function mode;

Figure 10 is the diagram of circuit showing conventional function mode;

Figure 11 is a diagram of curves, indicates the relation between vdc and spooling length applied in particular form operation;

It is how to detect slip that Figure 12 shows slippage detecting sensor;

Figure 13 is a diagram of circuit, in order to the function detecting thin slice breakage to be described;

Figure 14 is a chart, in order to illustrate how to use the signal coming from sensor.

Detailed description of the invention

With reference to accompanying drawing, will make an explanation to embodiments of the invention.Fig. 1 is the schematic diagram of a medicament packing machine, mainly indicates a paper-advance unit and a packing device.Paper-advance unit has a bolster 1, this axle is fixed wtih rotationally a base pipe P.This base pipe P wrapped around the board rolls R of Key works Drug packing cardboard S.Thin slice S from unwinding roll R, and is fed into packing device by feeding running roller 2,3.

In this packing device, thin slice is longitudinally converted into two halves by a triangular plate 4.Medicine falls in the space of folding thin slice formation.Then, thin slice by the heating running roller 6 with beam bear at Width along dual-side spacing one predetermined space heat seal.This packing device comprises other parts many, illustrate only 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 one end of center shaft 1a is fixed on back plate 11 by a nut, outer shaft 1b is fixing around center shaft entirety, quill shaft 1c is fixed on outer shaft 1b by bearing 12, and bearing 12 is arranged near the two ends of outer shaft 1b.

Center shaft 1a at one end has the outshot 13 of an axle.Outer shaft 1b has a flange 14 in same one end.Quill shaft 1c has a flange 15 at the other end.The base pipe P be fixed on quill shaft 1c is rotatable relative to bolster 1 with roll R.Several magnet 16 are arranged in the inner peripheral surface of flange 15 with suitable spacing.Centrally pipe P end face ferromagnet 17 is circumferentially set.Magnet 16 attracts ferromagnet 17 detachably base pipe P and roll R to be fixed on quill shaft K.

The packing laminate sheet S of unwinding roll R is by motor brake 20 by suitable tensioning, and motor brake 20 engages with quill shaft 1c.The motor brake 20 be fixed on back plate 11 is connected on wheel word 21 by belt conveyor (not shown).This wheel word 21 has an output shaft, this output shaft is fixed wtih a small transmission gear 22, and this gear 22 is meshed with the big gear wheel 23 on the outer rim surface being arranged at flange 15.Like this, by excitation motor brake 20, braking force is put on quill shaft 1c.

Motor brake 20 is one by the small-sized alternating current dynamo of 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 change of this braking force realizes by changing the vdc putting on four-stage.

As shown in Figure 3, control setup 30 receives the signal coming 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 thin slice displacement pickup comprises a proximity switches 26 and outshot 27.

Specifically, based on the sheet length sensor signal of the first embodiment and the signal of rotary angle transmitter, control setup accurately calculates the length of the thin slice S of unwinding roll R, and corresponds to the change regulating brake force of reel R diameter, to regulate the tension force put on thin slice.

As shown in Figure 6, the axis of four pieces of magnet 24 surrounding tube P of the second embodiment is in the inner peripheral surface that 67.5 ° are arranged at base pipe P, and the axis of four hall element sensor 25 surrounding tube P is on one end that 90 ° are arranged at bolster 1.

But the number of positions of magnet 24 and sensor 25 is not limited to the situation shown in Fig. 6.Fig. 7 shows the quantity of these parts and some changes of setting.In each version, when base pipe P rotates 22.5 °, hall element sensor or sensor 25 can produce an impulse singla.

In addition, substitute magnet 24 and the combination of 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 on one end of bolster 1 (outer shaft 1b) as Hall element 25.

On the prolongation that such optical sensor can also be fixed on the flange end being arranged at outer shaft 1b or permanent seat, and outshot is arranged on base pipe P, to pass through between the light-emitting diode and light cutting device of optical sensor with 22.5 ° spaced.Optical sensor is identical with the quantity of magnet 24 with hall element sensor 25 with the number of outshot.

Fig. 3 schematically shows and supplies packing laminate sheet from paper-advance unit for controlling and pack the block scheme of the circuit of each several part parts of the device of medicine.Its control setup 30 receive come from end sensor 31 signal, come from the signal of the rotary encoder 32 be arranged near feeding roller 3 and come from the signal of the rotative speed meter be fixed on motor 6a output shaft, wherein motor 6a is meshed with the axle heating one of roller 6; And based on above-mentioned a kind of signal.Produce the output of excitation motor brake 20 or motor 6a.Sequence number 34 represents an input media for incoming external data.

Fig. 5 is the lateral plan watched along the direction of the arrow VI-VI in Fig. 2, mainly indicates the position of the displacement detecting sensor for packing laminate sheet.In this embodiment, a proximity switches 26 is arranged on back plate 11.16 juts 27 are arranged on the flange 15 of hollow rotatable axle 1c of bolster 1.

If there is pitch difference between the rotary angle transmitter signal detected by hall element sensor and the signal detected by displacement detecting sensor, so control setup will determine to there is displacement.

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 paper-advance unit _maxwith minimum diameter d ₀all 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 rotating decoder 32, thus applies a suitable tension force by regulating brake force to thin slice according to the diameter of the change 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 is r=30 μm.Like this, the braking force produced by motor brake just changes once when the diameter of paper bowl R often reduces (160-64)/4=24mm.

The length L forming the thin slice of the reel R of given diameter is provided by following formula:

L＝[(d ₀+2×γ)+(d ₀+2×γ)+…+(d ₀+2×(n-1)γ

+(d ₀+2×nγ)]π

＝[nd ₀+2(1+2+…+n-1+n)γ]π

$=[{\mathrm{<figure-callout\; id="0"\; label="nd"\; filenames="H051D7073620060106E000121.png"\; state="\{\{state\}\}">nd</figure-callout>}}_0+2\&times;\frac{n(n+1)}{2}\mathrm{\&gamma;}]\mathrm{\&pi;}$

＝[d ₀+(n+1)γ]nπ …(1)

(wherein n is the number of turns)

The diameter of paper bowl R is provided by following formula:

d _max＝d ₀+2×nγ …(2)

From formula (1), when 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)

Now the diameter range of paper bowl is divided into four-stage: N=1 (maximum), 2 (second largest), 3 (the third-largest) and 4 (minimum).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, in 8B, for ease of the explanation of running, number and the setting of magnet 24 and hall element sensor 25 are different from the above embodiments.But it operates substantially is identical: namely often rotate 22.5 ° and produce an impulse singla.

As shown in Figure 8 A, when packing laminate sheet unwinding length 1, if the radius of paper bowl is large, then angular transducer produces little pulse, and when paper bowl radius reduces, as shown in Figure 8 B, the number of pulse increases.When paper bowl radius be maxim and minimum value time pulse number be respectively 3 and 10, the pulse number scope of 3-10 is divided into four-stage and carrys out regulating brake force to apply a DC current, and this DC current may correspond to and applies suitable tension force in each stage of motor brake 20.

Following relation is there is between above-mentioned tension level N=1-4 and pulse number.Suppose that the minimum and maximum diameter of paper bowl R is respectively 1600mm and 64mm, so when paper bowl diameter is maxim, the sheet length of unwinding from paper bowl will be π × 160mm.Produce an impulse singla because angular transducer 25 often rotates 22.5 DEG C (often enclosing 16 pulses), therefore thin slice is by unwinding π × 160/16=314m/m.When unwinding length is 3140m/m, pulse number is 10.

When paper bowl diameter is minimum, between the sheet length of unwinding and pulse number, there is following relation.That is, due to × 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 the method is as follows:

Fig. 9 and 10 is for showing the diagram of circuit of 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 usual mode.

Under the particular form shown in Fig. 9, control setup checks the various conditions of normal packaging operation in packing device, thus successfully can carry out normal manner of packing.Before normal packaging running, packing laminate sheet must be arranged in packing device rightly.Packing laminate sheet is manually arranged by index(ing) feed usually.Mode and this special mode.

In step so), control setup determines whether current mode is particular form.If what meet following condition starts particular form first, i.e. the excitation of end sensor or contiguity, and index(ing) feed mode or the counter-rotational detection of spooling length sensor.Touch energized when when a paper bowl runs out, a new paper bowl is mounted and is connected with thin slice above.

Before all operations start, start intermittent mode by opening control setup, and with above-mentioned mode manual installation packing laminate sheet.

This special operation scheme is necessary, this is because not always arrange new complete paper bowl, also may install the paper bowl used, such as, have the paper bowl of the half of new paper bowl diameter.If the paper bowl filled only has the half of new paper bowl diameter, so tension force is adjusted to a by-level at first, and the tension force of this level is less than the tension force corresponding to new paper bowl diameter.

If in step so), current mode is judged as particular form, and so tension force is just set as maxim in step SS1, and encourage various sensor (reference sensor, tachometer generator, winding sensor, base pipe slippage sensor) (step SS2).Like this, packing laminate sheet is by manual feeding and come from sheet length sensor or rotate 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 formulae discovery to go out the length of the paper bowl based on these signals, such as, to determine whether paper bowl has maximum gauge, the half of maximum gauge.Be impossible (NO) if this, perform step SS3 so again.If possible, so control setup determines in step SS7 whether the condition entering particular form is more all eliminated.If determine that condition is eliminated, so tension force is adjusted to suitable level in step SS8.Step SS9 and SS10 is the step for inspection center's pipe skew, and this will be described hereinafter.

In the tension adjustment stages of step SS8, corresponding to the vdc of maximum tension, be set at 25v when paper bowl has maximum gauge (new paper bowl), 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 is adjusted to a suitable level, program turns back to step S0, to determine whether the running implementing particular form again.Now, program proceeds to conventional operation mode [A].

Under the conventional operation mode shown in Figure 10, index(ing) feed mode switch is by manual switchover.Next in step sl, read the data of earlier set, and make various sensor start (S2).At this moment, the conventional operation of packing device is started.When conventional operation starts, tension force is controlled in the DC current values be applicable to being arranged under special operation scheme.

Then, in step S3, S4 and S5, the length signals of thin slice is transfused to, to calculate the sheet length of paper bowl in the mode identical when specific run mode with the signal of angular transducer.This calculating is undertaken by above-mentioned mode substantially.As the result calculated, if it is unworn, a complete paper roll that paper bowl R shows, so vdc is in the same manner as in the first embodiment according in step S6, judgement in S8, S10 and S12 is in step S7, S9,25V is set to respectively, 16V, 12V or 8V in S11 or S13.Figure 11 shows the relation between above-mentioned spooling length and DC voltage control.

After the control being completed tension force by one of above-mentioned route, based on the signal being derived from proximity switches 26, control setup judges whether base pipe slides in step S14.As shown in Figure 5, relative 16 the ferromagnet juts of switch 26 are arranged, and just produce an impulse singla whenever base pipe rotates 22.5 °, and its mode is identical with the mode that Hall element angular transducer 25 produces impulse singla.

In these embodiments, angular transducer 25 and 26 is different type, but they also can be the sensors of identical type.The time schedule of Figure 12 shows the relation between impulse singla and corner produced by angular transducer.As shown in the figure, the impulse singla produced by slippage detecting sensor synchronously can obtain, unless winding condition is with tension variation with the impulse singla produced by spooling length detecting sensor.

Such as, but if the rotational resistance of the motor brake 20 produced by each vdc above-mentioned is improper, if the tension force of tension level N=2 is too large, so paper bowl R acutely will rotate with base pipe P.This is changed making magnet body 17 by the position that magnet 16 attracts.If this thing happens, although so hall element sensor 25 keeps producing impulse singla every 22.5 °, proximity switches 26 will produce two impulse singlas simultaneously, and when base pipe is rotated further 22.5 °, would 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 rotates a whole circle, slippage detecting sensor can not produce impulse singla at position C and D.On the contrary, there is certain displacement between D and A impulse singla is created.

In this case, control setup can judge with reference to the signal coming from spooling length detecting sensor that slippage detecting sensor does not produce pulse position at position C.Such as, if when horizontal N=2, the DC current of 16V is just too large, thus makes tensile force too large, and so voltage should be reduced to 14V so that tensile force is adjusted to suitable level.Judge owing to having this voltage, any desired location after the D of position can produce an impulse singla.

After regulating any position of the base pipe P produced due to the change of thin slice tensile force to move, in step S16, whether control setup is still wound on pipe P based on the signal detection cardboard being derived from end sensor 31.If sensor 31 does not still detect the terminal of cardboard, so just carrying out the running of step S3, namely by repeating above-mentioned calculating, the tensile force of thin slice being controlled according to the spooling length of paper bowl.

When end sensor 31 detects the terminal of packing laminate sheet S, tensile force controlling functions terminates.If be necessary after this or need continuous print to pack, so program turns back to particular form, to replace reel R with a new paper bowl and to connect the end of thin slice.

Step SS9 and SS10 is shown by dashed lines in the diagram of circuit of particular form, and this just means that these steps are not main.If arrange these steps, so its effect detects the step S14 in operating with slippage under conventional function mode, and S15 is identical.

Above-mentioned explanation makes when supposing that paper bowl R is the paper bowl of a full volume.If the paper bowl being about maximum radius half is arranged on paper-advance unit, in special operation scheme, tension force is adjusted to slightly larger than volume full in usual manner operational process paper bowl by unwinding to one of maximum gauge half tension force after, conventional operation mode is started.So just may start conventional operation mode smoothly, and the sharply rising of tension force can not be produced.

In the explanation of above embodiment, we have described the sensor module comprising proximity switches 26 and projection 27, they are as a sensor, for " slippage " of detector tube P opposite hollow axle K.This sensor module can be used as the substitute being used as the sensor module of angle detecting sensor comprising magnet 24 and hall element sensor 25.

The front a kind of sensor module comprising the jut 27 of proximity switches 26 detects the identical cycle with the angle of the hall element sensor 25 shown in Figure 12 and exports an impulse singla, as long as motor 20 does not apply abnormal braking force (such as due to the fault of brake motor 20).Like this, just can with this impulse singla as angle detection signal.

If proximity switches is used as angle detecting sensor, the hall element sensor being so used as angle detecting sensor just there is no need, and can be saved.Like this, the angular transducer comprising proximity switches 26 not only serves as angular transducer but also be used as slippage detecting sensor.For making this sensor be used as slippage detecting sensor, need a contrast signal.This contrast signal can be produced by rotation decoder 32.

If brake motor 20 is applied with an abnormal braking force, if namely motor 20 quits work, so quill shaft K and flange 15 thereof will quit work.Slippage will be produced like this between pipe P and flange 15.Even if be only now paper feed slightly, rotate decoder 33 also by generation signal.Such proximity switches 26 just the fact inconsistent according to the impulse singla of the signal of decoder 33 and proximity switches 26 can detect that managing positive opposing flanges 15 slides.

In the above-described embodiment, angle detecting sensor, slippage detecting sensor and spooling length detecting sensor (rotation decoder) are all used for determining winding diameter.But it may use the sensor some to detect thin slice cut come.This function is very useful, because the thin slice tensile force adjusting device of each embodiment uses together with medicine packaging apparatus, to put on thin slice due to excessive braking force or run out due to the thin slice in one of foil roll, the thin slice of feeding packing device can be made to be cut off.

In the above-described embodiment, rotate decoder 32 and determine feeding length.Based on the feeding length detected, the sheet length be wound on paper bowl can be calculated.Based on by the spooling length calculated like this, this length is the impulse singla of angle detecting sensor or hall element sensor 25, can calculate winding radius with regulating brake force.And " slippage " of base pipe P opposing flanges 15 can be detected by the proximity switches 26 as slippage detecting sensor.The signal coming from these sensors also can be used to detect that thin slice is cut-off in the following manner.The situation that the cut-out of thin slice is detected has two kinds.

In a first scenario, thin slice is cut-off between paper bowl R and rotation decoder 32.In this case, angle detecting sensor (i.e. hall element sensor 25) and slippage detecting sensor (i.e. 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 is cut-off by the extention determination thin slice of program, and the extention of its Program is used for determining that thin slice is cut-off.Based on this judgement, control signal is sent to the motor 6a of heating roller 6 by control circuit 30, to make roller 6 out of service, and control signal is sent to the feed arrangement for transmitting medicine to packing device, to stop the supply of medicine.The situation that thin slice has been cut off shows on read out instrument (not shown).

Show rotation decoder 32 to be in figure 3 fixed on the axle of feeding paper bowl 3.Graphic running roller 3 is a pair roller for feeding thin slice, and thin slice is clipped between this pair roller.One of roller is driven by a motor, and motor does not illustrate.Rotate decoder 32 to be fixed on the axle of another roller 3 not driven.Unshowned motor and the motor 6a for heating roller 6 are synchronously driven.But also can save this motor, feeding roller 3 is driven by motor 6a by belt.

Figure 13 shows the diagram of circuit of an embodiment, and this embodiment has above-mentioned for judging the program that thin slice has ruptured.As shown in the figure, between the step S17-S19 step S4 that is inserted in the diagram of circuit of Figure 10 and S5.The signal whether obtaining coming from sheet length sensor and angular transducer is judged in S17.If the data of obtaining, so program proceeds to S5.

If but do not obtain data (NO), so its time would be measured at S18.If do not obtain data within a predetermined time, so just judge that thin slice ruptures.Like this, a mis-information will be shown, and if need, above-mentioned drived control can be stopped.When not obtaining such data, the state of sensor signal as shown in figure 14.For base pipe P again and rotation subsequently, the state be transfused to without sensor signal is illustrated.Said process is identical with lower a kind of situation.

The second situation is the situation at all not having 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 be made up of rotation decoder 32 not produce signal, and revolution-meter as shown in Figure 3 can rotation counting signal.In this case, just by the shearing providing determining program thin slice to be detected, thus can judge that thin slice is cut-off.After judging that thin slice is cut-off, control identical with the first situation.

Rotate 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 for heating roller 6.Determining program is identical with above-mentioned two situations.

If thin slice was cut off in a period of time of above-mentioned two kinds of feelings, so just provide determining program to judge: if the non-detection signal of one of slippage detecting sensor and angle detecting sensor, and rotate decoder 32 with revolution-meter 33 and detect signal, so thin slice is just cut off.Judge thin slice cut-off after control identical with the first situation.

The present embodiment is applied in the device shown in Fig. 2, and in the apparatus, magnet 16 and ferromagnet 17 are arranged between the flange portion 15 of base pipe P and quill shaft 1c, thus makes base pipe P can opposite hollow axle 1c (flange 15) slippage.But the present embodiment also can be applicable in following device, in the apparatus, substitute this magnet fixing device, the jut be made up of magnet 16 and the ferromagnet 17 of entirety is arranged on flange portion 15 (or base pipe P), thus base pipe P can not be slided along hand of rotation opposed flange portions 15.Base pipe P like this, just 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 the angle detecting sensor that comprises hall element sensor 25 can be used.In the present embodiment, even if thin slice midway disconnects or basic non-feeding thin slice, angle detecting sensor also can not produce detection signal.Like this, according to rotating on axle that decoder 32 is fixed on roller 3 or on the axle of motor 6a, determining program detects that the fact that thin slice has been cut off, determining program can judge whether rotation decoder 32 produces signal when revolution counter 33 produces signal.

It is required by means of the cutting sheet measuring ability of various sensor and determining program at following this device: the feeding length of thin slice in this device, spooling length, the such data of winding diameter are temporarily stored in memory device (RAM), when feeding thin slice, device is out of service and be closed, when restarting, ephemeral data disappears and can not be used.

By being stored in by net result in the controlled read-only memory (ROM) (EEPROM) of electronics erasable/program, judged result would not be deleted when restarting, thus this device is correctly restarted.

According to the present invention, according to coming from the change that come from the signal of another sensor relative to the signal of one of angular transducer of sheet length sensor, the spooling length when front wheel and winding diameter can be determined, and select braking force to regulate the tensile force of thin slice according to diameter.And, according to have or passive in the signal of sheet length sensor and angular transducer, detect the fracture of thin slice.In the apparatus, even if spooling length is unknown completely, also by selecting the tensile force of the brake-force control thin slice corresponding to roller diameter, wherein roller diameter corresponds to the current spooling length determined according to take off data.So just can regulate the tensile force of thin slice smoothly, and the drastic change of tensile force can not be produced.And the fracture of thin slice also can be measured.

Claims (4)

1. the base pipe (P) for the hollow of the web tensions control apparatus of medicament packing machine, reel the thin slice (S) of paper roll (R) thereon, this web tensions control apparatus comprises an angular transducer, this angular transducer comprises magnet (24) and the hall element sensor (25) for detecting magnet (24), to calculate the corner of the base pipe (P) of this hollow, this web tensions control apparatus also comprises one for measuring the sheet length sensor of the thin slice feeding length being fed to thin slice treating stations from thin slice feeding passage, wherein, regulated from the tension force of the thin slice (S) of paper roll (R) debatching by the base pipe (P) according to the change of reel diameter braking force being applied to this hollow, the change of described reel diameter calculates based on the winding amount of paper roll, this medicament packing machine is suitable for described thin slice (S) to be fed into for packing pharmaceutical packing device through feeding running roller, regulate the tension force of thin slice (S) in mode stage by stage by this web tensions control apparatus simultaneously, the base pipe of described hollow is supported on non rotatable center shaft (1a rotationally, 1b),

It is characterized in that, the inner peripheral surface that described magnet (24) is arranged at the base pipe (P) of hollow is arranged so that hall element sensor (25) produces an impulse singla when this base pipe (P) rotates a set angle, and the winding amount of paper roll is jointly determined by described angular transducer and described sheet length sensor, described hall element sensor is arranged on non rotatable center shaft (1a, 1b), and the base pipe of described hollow can rotate together with the quill shaft (1c) be installed in rotation on described center shaft (1a, 1b).

2. the base pipe of hollow according to claim 1, is characterized in that: for the base pipe of described hollow is connected to described quill shaft (1c) so that the connecting device that can rotate together comprises ferromagnet (17) that the end face along base pipe (P) one end of described hollow arranges and is arranged at described quill shaft (1c) goes up and the magnet (16) being configured to magnetically attract described ferromagnet (17).

3. the base pipe (P) for the hollow of the web tensions control apparatus of medicament packing machine, reel the thin slice (S) of paper roll (R) thereon, this web tensions control apparatus comprises an angular transducer, this angular transducer comprises magnet (24) and the hall element sensor (25) for detecting magnet (24), to calculate the corner of the base pipe (P) of this hollow, this web tensions control apparatus also comprises one for measuring the sheet length sensor of the thin slice feeding length being fed to thin slice treating stations from thin slice feeding passage, wherein, regulated from the tension force of the thin slice (S) of paper roll (R) debatching by the base pipe (P) according to the change of reel diameter braking force being applied to this hollow, the change of described reel diameter calculates based on the winding amount of paper roll, this medicament packing machine is suitable for described thin slice (S) to be fed into for packing pharmaceutical packing device through feeding running roller, regulate the tension force of thin slice (S) in mode stage by stage by this web tensions control apparatus simultaneously, the base pipe of described hollow is supported on non rotatable center shaft (1a rotationally, 1b),

It is characterized in that, the inner peripheral surface that described magnet (24) is arranged at the base pipe (P) of hollow is arranged so that hall element sensor (25) produces an impulse singla when this base pipe (P) rotates a set angle, and the winding amount of paper roll is jointly determined by described angular transducer and described sheet length sensor, described hall element sensor is arranged on non rotatable center shaft (1a, 1b).

4. one kind for the base pipe (P) of the hollow of the web tensions control apparatus of medicament packing machine and the combination of paper roll (R), the thin slice (S) of paper roll (R) is wound on the base pipe (P) of hollow, this web tensions control apparatus comprises an angular transducer, this angular transducer comprises magnet (24) and the hall element sensor (25) for detecting magnet (24), to calculate the corner of the base pipe (P) of this hollow, this web tensions control apparatus also comprises one for measuring the sheet length sensor of the thin slice feeding length being fed to thin slice treating stations from thin slice feeding passage, wherein, regulated from the tension force of the thin slice (S) of paper roll (R) debatching by the base pipe (P) according to the change of reel diameter braking force being applied to this hollow, the change of described reel diameter calculates based on the winding amount of paper roll, this medicament packing machine is suitable for described thin slice (S) to be fed into for packing pharmaceutical packing device through feeding running roller, regulate the tension force of thin slice (S) in mode stage by stage by this web tensions control apparatus simultaneously, the base pipe of described hollow is supported on non rotatable center shaft (1a rotationally, 1b),

It is characterized in that, the inner peripheral surface that described magnet (24) is arranged at the base pipe (P) of hollow is arranged so that hall element sensor (25) produces an impulse singla when this base pipe (P) rotates a set angle, and the winding amount of paper roll is jointly determined by described angular transducer and described sheet length sensor, described hall element sensor is arranged on non rotatable center shaft (1a, 1b).

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