CN1036743A - The device that is used for accelerating reserved web - Google Patents
The device that is used for accelerating reserved web Download PDFInfo
- Publication number
- CN1036743A CN1036743A CN 89101698 CN89101698A CN1036743A CN 1036743 A CN1036743 A CN 1036743A CN 89101698 CN89101698 CN 89101698 CN 89101698 A CN89101698 A CN 89101698A CN 1036743 A CN1036743 A CN 1036743A
- Authority
- CN
- China
- Prior art keywords
- web
- transmitter
- reserved web
- reserved
- memory cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
- B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
- B65H19/1884—Details for effecting a positive rotation of web roll, e.g. accelerating the replacement roll
- B65H19/1889—Details for effecting a positive rotation of web roll, e.g. accelerating the replacement roll related to driving arrangements
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
The present invention relates to a kind of device that is used at strap-like objects take-off device accelerating reserved web, this device is applied in the printer especially.Reserved web comprises a transmission setting device, it is connected with memory cell with a calculating with the differential element of the observed reading of a given value transmitter, an input circumferential velocity, and the given value transmitter all is connected with this calculating storaging unit with the observed reading transmitter with a current transformer.Thereby, but reserved web is irrelevant with moment of inertia with identical preliminary election, constant tangential acceleration acceleration, can in time calculate pick-up time and moment of inertia for this reason.
Description
The present invention relates to a kind of being used for, particularly in the strap-like objects take-off device of the rotatable printer of convolution, quicken standby device around volume at the band processing machine.
Having automatic replacing in the take-off device of volume,, needing given reserved web from zero pick-up time to window of web velocities for determine changing around the input point of volume step etc., this time in a known control device (DE-PS2619236) by given in advance.According to following reason, desired pick-up time should be accurate as much as possible.When given pick-up time was long, the reserved web that accelerates to the printer orbital velocity had additional being rotated further, and finished up to this given pick-up time.So just increased following danger, promptly around volume be used for that bonding bond end is unclamped and bonding maybe essential the interruption around volume replacing process that cause misplacing, and carry out bonding by hand.Otherwise, when the pick-up time that in fact needs greater than predetermined pick-up time, can cause that the adhesion process that is right after after acceleration postpones, its possible consequence is: the former residue coiled material around volume in the unwinding is carrying out using up before bonding, makes automatic bonding failure.In all cases, all can cause machine stall and produce waste paper.
The moment of inertia of understanding reserved web is favourable to take-off device.According to european patent application 18555, can accelerate to the required time of window of web velocities according to the reserved web of measuring and calculate the moment of inertia of this reserved web.The shortcoming of doing like this is to occur in accelerator can't utilizing moment of inertia to obtain the in check braking square of reserved web under the situation of shutdown braking.Therefore little shut down glancing impact with excessive big braking masterpiece when one, make bond end in the belt transmission and the axle sleeve on the bullet in the middle shaft drive all can be subjected to very big load around volume.Under first kind of situation, the bond end displacement will take place and cause misplacing bonding.Under second kind of situation, owing to, need to reduce window of web velocities and continue printing, perhaps even to cause this disengaging around volume, the thing followed be that printing is interrupted around the damage of spool cover.Also having a shortcoming is that the acceleration of reserved web realizes with constant torque.Under little reserved web situation, can make bond end be subjected to very heavy load, also can cause unclamping and above-mentioned consequence of bonding end.
The objective of the invention is to, a kind of bonding device that therefore reduces waste paper and machine rundown time that reaches of avoiding misplacing is provided.
The present invention is a basis with following task: provide a kind of in the strap-like objects take-off device device of accelerating reserved web, this device comprises: an in check driving device that is used for reserved web; The observed reading transmitter of its circumferential velocity; One is calculated and memory cell, and it is by the observed reading transmitter that is used for circumferential velocity and reserved web rotating speed and an observed reading transmitter incoming signal that is used for window of web velocities; A setting device that is connected with rpm governor in its back, the control mechanism of this rpm governor and driving device joins; By this device, can guarantee in time to obtain the pick-up time and the moment of inertia thereof of reserved web, and protect bond end.
According to the present invention, this task takes following method to solve: the observed reading transmitter that is used for the circumferential velocity of reserved web sends signal to a differential element, the actual value input end of the output of differential element and a comparing element joins, the given value input end of comparing element links to each other with a given value transmitter, its mouth links to each other with a setting device, and current transformer in the circuit series of the control mechanism of driving device and given value transmitter are received and calculated and memory cell.
Thereby, but all reserved web all irrespectively always quickens with tangential acceleration identical preliminary election, that maintenance is constant with their sizes and moment of inertia.Like this, can accurately calculate the acceleration/accel time of required reserved web of any time of reaching existing window of web velocities in the processing machine according to unusual simple mathematical relation.The timely like this acceleration/accel time that obtains can be determined the standby acceleration/accel zero hour around winding up roller best, thus prevented to be accelerated done unnecessary rotation before bonding or reach window of web velocities excessively evening and formerly use up before bonding around twisting in around twisting in to finish.Therefore, avoided wrong bonding relevant with the machine stall of appearance with waste paper.
Can also when the acceleration/accel process is initial, determine the moment of inertia of reserved web according to device of the present invention.Like this, do to shut down glancing impact in quickening rotation, lock torque can come definite value according to moment of inertia.For one little of volume, in the circumference transmission, can protect bond end thus, in middle shaft drive, can protect around the spool cover, and reduced wrong sticking, machine stall, print out rate slows down or the danger of deviating from around volume.Can try to achieve at an easy rate around the volume quality from moment of inertia, provide as the process data of for example processing machine and use.
At last, quicken all reserved webs with identical tangential acceleration and also bring an advantage, though to little around volume, bond end does not have the force of inertia that strengthens yet, thereby has eliminated the danger of unsticking.
Further explain the present invention according to several embodiment below.
Accompanying drawing is the standby diagram of block around the device of rolling up of acceleration, wherein,
Fig. 1: have the bel-drivenn device;
Fig. 2: driven off by shaft device in having.
Acceleration device shown in Figure 1 comprises both arms around roll support 1, and its supporting is former in volume 2 and reserved web 3.Band 4 is from former unwinding and give processing machine on volume 2, for example printer.This band drives the band guide reel 5 with band pulse generator 6, and this pulse generator 6 joins with calculating and memory cell 7.Two arms around roll support 1 are equipped with rotary pulsed transmitter 8,9 respectively, whenever rotate a circle around volume, and they just send a pulse.The rotary pulsed transmitter (being rotary pulsed transmitter 8 in the drawings) that is attached to reserved web links to each other with memory cell 7 with calculating by means of transfer device 10.Drive belt 11 is arranged on the reserved web 3, and it and DC machine 12 form and are in transmission connection.The latter further is coupled with tachogenerator 13 and rotary pulsed transmitter 14 again.Rotary pulsed transmitter 14 is connected with memory cell 7 with calculating, and tachogenerator 13 is imported to differential element 15, and the mouth of differential element 15 links to each other with the actual value input end of comparing element 16.The given value input end of comparing element 16 links to each other with memory cell 7 with calculating, and the mouth of comparing element 16 links to each other with setting device 17.The latter and rpm governor 18 join, and rpm governor 18 is exported to the DC motor 12 as control mechanism.In the armature current loop of DC machine 12 current transformer 19 is arranged, it is connected with memory cell 7 with calculating through current-to-voltage converter 20, and the latter is connected with setting device 17 again.
Employed symbolic representation is as follows in the explanation of back:
a
tTangential acceleration
a
TBrTangent line postpones
The diameter of D reserved web
The f function
I
MThe armature current that adds speed motor
J
ZThe moment of inertia of middle shaft drive
J
GThe moment of inertia of belt transmission
J
KMoment of inertia around volume bearing (bullet)
J
RThe moment of inertia of reserved web
K
1To K
9Constant
M
AGThe driving torque of belt transmission
M
AZThe driving torque of middle shaft drive
M
BrGThe braking square of belt braking device
M
BrZThe braking square of middle shaft brake device
M
RFriction moment around the volume bearing
M
RGThe friction moment of belt transmission
The standby quality of m around volume
The circumferential path of each circumference pulse of N
N quickens rotating speed of motor
The web path of each band pulse of S
T
VTime gap
The ta pick-up time
V
BWindow of web velocities
V
UCircumferential velocity
Z
BThe number of band pulse
Z
DRotary pulsed number
Z
UThe number of circumference pulse
ω adds the cireular frequency of speed motor
Need not to change in greater detail at one and beg for the school insect destructive of the roots of seedlings around swish and irrigate to stick to and close on use up former on the band 4 of volume 2 with need.For this reason, reserved web 3 will be by means of DC machine 12 with its circumferential velocity V
UAccelerate to window of web velocities V from zero
BThis is to utilize constant tangential acceleration a
tFinish, it is given in advance to comparing element 16 with the form of a voltage.This given value is stored in calculating and the memory cell 7.Another given value transmitter can also be set, potentiometer for example, it links to each other with memory cell 7 and comparing element 16 with calculating.The actual value of tangential acceleration is the value as voltage that draws through the voltage time differential that makes tachogenerator 13 in differential element 15, and delivers to comparing element 16.Utilization that try to achieve at this with deviate given value, in setting device 17, derive the size of regulated quantity.The rpm governor 18 of reacting according to this regulated quantity changes the rotating speed of DC machine 12 accordingly.
The linear relationship that circumferential velocity improves in each unit of time when constant according to tangential acceleration, reserved web 3 needed pick-up time t
aFor:
t
a＝ (V
B)/(a
t) （1）
Or
t
a＝K
1·V
B（2）
K wherein
1=1/ (a
t) (3) be constant.
In calculating and memory cell 7, by the time gap T that provides by
VIn the band pulse Z of band pulse generator 6
BNumber and the panel path S of each band pulse representative, according to formula
V
B＝ (Z
B·S)/(T
V) （4）
Try to achieve plane speed V
B
The driving torque M that adds speed motor during for belt-driving
AGHave:
M
AG=M
RG+ J
GA
tK
2+ (4J
RA
t)/(D
2K
2)+(4J
KA
t)/(D
2K
2)+(2M
R)/(DK
2) (5) wherein
K
2＝ (ω)/(V
U) ＝ (2π·n)/(V
U) （6）
J
R＝ (M
AG·D
2·K
2)/(4a
t) - (M
RG·D
2·K
X)/(4a
t) - (J
G·D
2·K
2 2)/(4a
t) -J
K- (M
R·D)/(2a
t) 。（7）
Try to achieve the moment of inertia J of reserved web 3 by formula (5)
RFor:
Driving torque M wherein
AGBe the armature current I of DC machine 12
MA known function:
M
AG＝f（I
M）。
Armature current I
MValue provide by current transformer 19, and be transformed into voltage by means of current-to-voltage convertor 20, give and calculate and memory cell 7.
Utilize formula (8) and following constant
K
3＝ (K
2)/4 （9）
K
4＝ (M
RG·K
2)/4 （10）
K
5＝ (J
G·K
2 2)/4 （11）
K
6＝ (M
R)/2 （12）
K
7＝J
K（13）
Formula (7) is transformed to
J
R＝[ (f I
M·K
3-K
4)/(a
t) -l
j]·D
2- (K
6·D)/(a
t) -K
7（14）
Constant has been determined that by the unwinding characteristic function of armature current is also determined, and tangential acceleration a
tProvide.The initial diameter D of reserved web 3 will be when the rotation of its first lap by two pulse Z of rotary pulsed transmitter 8
DBetween the circumference pulse Z of circumference pulse generator 14
UNumber and the circumferential path N of each circumference pulse according to following formula:
D＝ (Z
U·N)/(π) （15）
In calculating and memory cell 7, try to achieve.Therefore can carry out moment of inertia J by means of calculating and memory cell 7 now
RCalculating.
Also can calculate simultaneously the quality m of reserved web
m＝ (8J
R)/(D
2) （16）
And can be used as for example process data of processing machine.
Each active component that works during to acceleration is similar, also can be according to moment of inertia J
RCalculate the lock torque M of the belt braking that is used for reserved web
BrG:
M
BrG＝-M
RG+J
G·a
tBr·K
2+ (4J
R·a
tBr)/(D
2·K
2) + (4J
K·a
tBr)/(D
2·K
2) + (2M
R)/(D·K
2) ，（17）
Tangential acceleration a wherein
TBrBe given in advance.Shutting down under the braking situation, by the lock torque M that calculates and memory cell 7 calculates
BrGSend into setting device 17 with the form of voltage.Setting device is ended the acceleration/accel adjustment to reserved web 3 in view of the above, and control rpm governor 18, and feasible DC machine 12 with the work of four-quadrant operation mode produces lock torques.
In an embodiment, the acceleration of reserved web is finished by means of motor.Other gives one example, if when the transmission of reserved web is realized as control mechanism by electronic coupler by the main drive of working machine, the present invention also can be employed.Make moment of inertia J by the relation of coupler torque transmitted and exciting current and by coupler
GThe constant K that changes
5Give and calculate and memory cell.
Acceleration device shown in Figure 2 comprises that both arms are around roll support 21, its supporting former around volume 22 and reserved web 23, band 24 from former unwinding and transmit on volume 22 by band guide reel 25, this guide reel is equipped with a band pulse generator 27 that is connected with memory cell 26 with calculating.Reserved web 23 connecting DC machine 29 around volume on the main shaft, on volume main shaft 30, connecting DC machine 31 around volume 22 former.Two arms around roll support 21 are equipped with rotary pulsed transmitter 32,33 respectively, whenever rotate a circle around volume, and they just send a pulse.By means of transfer device 34,35, the DC machine and the rotary pulsed transmitter that are attached to reserved web are worked, in Fig. 2, promptly rotary pulsed transmitter 32 links to each other with memory cell 26 with calculating, and DC machine 29 links to each other with the output of rpm governor 36.Outer placing at reserved web 23 is provided with a roller 37, is coupled with a circumference pulse generator 38 and a tachogenerator 39 that links to each other with memory cell 26 with calculating thereon, and the latter is input to differential element 40.The actual value input end of comparing element 41 is delivered in 40 outputs of differential element, and its given value input end is connected with memory cell 26 with calculating, and the mouth of comparing element is connected with setting device 42.Rpm governor 36 is delivered in the latter's output.Be provided with current transformer 43 in the armature current loop of DC machine 29,31, it links to each other with memory cell 26 with calculating through current-to-voltage converter 44, and the latter is connected with setting device 42 again.
Changing in licking journey, reserved web 23 need stick to and close on use up former on the band 24 of volume 22.For this reason, reserved web 23 will be by means of DC machine 29 with its circumferential velocity V
UAccelerate to window of web velocities V from zero
BThis is to utilize constant tangential acceleration a
tFinish, it is given in advance to comparing element 41 with voltage form.Store this tangential acceleration a
tThe calculating and the memory cell 26 of given value play the given value transmitter.The actual value of tangential acceleration is the value as voltage that draws through the voltage time differential that makes tachogenerator 39 in differential element 40, and delivers to comparing element 41.Utilization that try to achieve at this with deviate theoretical value, in setting device 17, derive the size of regulated quantity.The rpm governor 36 of reacting according to this regulated quantity changes the rotating speed of DC machine 29 accordingly.
For obtaining the pick-up time t of reserved web 23
a, and the same the obtaining of formula (2) among first embodiment:
t
a＝K
1·V
B（2）
K wherein
1=1/ (a
t) (3) be constant.
Equally, according to formula (4)
V
B＝ (Z
B·S)/(T
V) （4）
By the Mei Juan Nang that runs quickly by a perch は sparrow ǖ neon
VIn the band pulse Z of band pulse generator 27
BNumber and the web path S of each band pulse representative try to achieve window of web velocities V
B
During for middle shaft drive, add the driving torque M of speed motor
AZHave:
M
AZ＝ (2J
R·a
t)/(D) + (2J
Z+J
K·a
t)/(D) +M
R（18）
Draw the moment of inertia J of this reserved web 23 by formula (19)
RFor:
J
R＝ (M
AZ·D)/(2a
t) -J
Z-J
K- (M
R·D)/(2a
t) （19）
Driving torque M wherein
AZBe the armature current I of DC machine 29
MA known function
M
AZ＝f（I
M） （20）
Electricity armature current I
MValue provide by current transformer 43, and send into voltage form by means of current-to-voltage convertor 44 and to calculate and memory cell 26.
According to formula (20) and following constant:
K
8＝ (M
R)/2 （21）
K
9＝J
Z+J
K（22）
Formula (19) is become
J
R＝[ (f(I
M))/2 -K
8]· (D)/(a
t) -K
9（23）
Constant K wherein
8And K
9Determined that by the take-off device characteristic function of armature current is also determined, and tangential acceleration a
tProvide.The initial diameter D that asks reserved web 23 is the same during with the bel-drivenn acceleration device, when its first lap rotation, according to formula (15)
D＝ (Z
U·N)/(π) （15）
Two pulse Z by rotary pulsed transmitter 32
DBetween the circumference pulse Z of circumference pulse generator 38
UNumber and the circumferential path N of each circumference pulse representative calculate and memory cell 26 in try to achieve.Therefore now can be by means of calculating and memory cell 26, according to formula (23) to moment of inertia J
RCalculate.
Also can calculate simultaneously the quality m of reserved web 23 according to formula (16)
m＝ (8J
R)/(D
2) （16）
The component that works during to acceleration is similar, also can be according to moment of inertia J
RCalculate the lock torque M that is used for the braking of reserved web 23 axis
BrZ
M
BrZ＝ (2J
R·a
tBr)/(D) + (2(J
Z+J
K)·a
t)/(D) -M
R（24）
Tangential acceleration a wherein
TBrBe given in advance.Shutting down under the braking situation, by the lock torque M that calculates and memory cell 26 calculates
BrzSend into setting device 42 with the form of voltage.Setting device is ended the acceleration/accel adjustment to reserved web 23 in view of the above, and control rpm governor 36, and feasible DC machine 29 with the work of four-quadrant operation mode produces lock torques.
In an embodiment, be provided with two arms around roll support.The present invention also can be applicable to the situation of three arms around roll support.
When application is of the present invention, also can supplies with and calculate and the memory cell signal by the analog measurement transmitter.For the rotating speed of reserved web, but the observed reading transmitter also each circle send out a pulse train, therefore, can write formula (15) as coefficient with the proportionate relationship of the pulse of every circle and the pulse that calculates.Equally, also can substitute the control of differential element, need insert a D and A converter in case of necessity with a number generator.Differential element and calculating and memory cell also can be arranged on the universal measurement value transmitter that is used to measure the reserved web circumferential velocity.
Claims (1)
1, a kind of in the strap-like objects take-off device device of accelerating reserved web, this device comprises: a driving device of being adjusted that is used for reserved web; Observed reading transmitter ash Huan Mian that is used for its circumferential velocity pounce on sincere feeling pain Wa ⒌ ピ send the bald insect destructive of the roots of seedlings of rotten outspoken storehouse a kind of reed mentioned in ancient books Yu group irrigate with gritty valgar try to gain to put in order probably smash ⑺ to push away the rotten cheat of human skull rake Huan catfish be that the Yu magpie is tried to gain to put in order and probably smashes ⑺ and push away black mole helmet lotus root ox ash Huan perch and flatter creek crack and help the valgar Gu of fierce and flatter the valgar Gu of male shave a man's head father of saddle cloth boundless and indistinct rice and flatter the angry Huang of cooked food krypton father rose order Dao apple melon and rinse the tomb gruel of the drooping plan of an ancient small-mouthed wine vessel and criticize sb's faults frankly the insect destructive of the roots of seedlings and irrigate with 3; the observed reading transmitter of circumferential velocity 23) is supplied with differential element (15 with signal; 40); the output of differential element and comparing element (16; 41) actual value input end links to each other; the given value input end of comparing element links to each other with the given value transmitter; the mouth of comparing element and setting device (17; 42) link to each other; current transformer (19 in the circuit series of driving device control mechanism; 43) and the given value transmitter be connected to and calculate and memory cell (7,26).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD31408188A DD278250A3 (en) | 1988-03-28 | 1988-03-28 | ARRANGEMENT FOR ACCELERATING A REPLACEMENT WRAPPING ROLLER |
| DDWPB65H/314 | 1988-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1036743A true CN1036743A (en) | 1989-11-01 |
Family
ID=5597940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89101698 Pending CN1036743A (en) | 1988-03-28 | 1989-03-27 | The device that is used for accelerating reserved web |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1036743A (en) |
| DD (1) | DD278250A3 (en) |
| DE (1) | DE3905402A1 (en) |
| FR (1) | FR2630719A1 (en) |
| GB (1) | GB2216503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076643C (en) * | 1995-02-28 | 2001-12-26 | 三菱电机株式会社 | Apparatus for calculating roll diameter of long material winder |
-
1988
- 1988-03-28 DD DD31408188A patent/DD278250A3/en not_active IP Right Cessation
-
1989
- 1989-02-22 DE DE19893905402 patent/DE3905402A1/en not_active Withdrawn
- 1989-03-22 FR FR8903744A patent/FR2630719A1/en not_active Withdrawn
- 1989-03-23 GB GB8906829A patent/GB2216503A/en not_active Withdrawn
- 1989-03-27 CN CN 89101698 patent/CN1036743A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076643C (en) * | 1995-02-28 | 2001-12-26 | 三菱电机株式会社 | Apparatus for calculating roll diameter of long material winder |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2216503A (en) | 1989-10-11 |
| FR2630719A1 (en) | 1989-11-03 |
| DE3905402A1 (en) | 1989-10-12 |
| DD278250A3 (en) | 1990-05-02 |
| GB8906829D0 (en) | 1989-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |