JPS5821507A - Apparatus for detecting connecting position of sheet material - Google Patents

Abstract

PURPOSE:To detect the connecting position of the sheet material highly accurately by detecting the coincidence of a preset value of the path length of the sheet material to a base point and the counted value corresponding to the feeding of the sheet material. CONSTITUTION:The sheet material 7 is conveyed from a reel 3 through winding roll 2, a reservoir 4, and a feeding roll 6. A movable roll 4A of the reservoir 4 is normally located at the uppermost limit position. When the reel replacement becomes necessary, roll 2 is stopped and the sheet of the new reel 3A is connected by a connecting machine. During this time period, the sheet is supplied from a reservoir. Therefore the position of the roll 4A is lowered to 4A'. This position is detected 25 and imparted to a timing circuit 20. The distance between the preset connecting position and the base point is preset in a connecting position detecting counter 23. The the feedback signal which is the result of the speed detection 15 is subtracted. When the preset value becomes zero, it is found that the connected part of the new and old sheets 7 and 8 has passed the base point.

Description

[Detailed description of the invention] The present invention processes and processes various sheet materials.

The present invention relates to a sheet material joining position detection device that detects the joining position of sheet materials using a process twin having a ninth redaper that operates continuously.

An example of a conventionally used process line for continuously processing and processing sheet materials will be described with reference to FIG. The sheet material is pulled out from the unwinding reel 1 by an unwinding feed roll 2 driven by an electric motor 1, passes through a redeper 4, and is supplied to the subsequent process twin by a feeding roll 6 driven by an electric motor 5. . Needless to say, the length of the sheet material wound on the unwinding reel 1 is finite.
In order to continuously supply sheet material to the fu cement line without stopping, the unwinding reel is replaced at the time when the nine sheet materials stored in the re-deperer 4 are being supplied to the sphin in the re-deperer 4. There is. For example, when the supply of sheet material 1 from unwinding reel 1 stops, a new sheet material 8 is immediately fed out from a new reel, and the leading end of sheet material 8 is attached to the tail end of sheet material 10 by the splicing machine. - during this work, that is! The sheet material from the re-deperer 4 is fed out until the sheet material 8 from the unwinding reel 3m is supplied to the Tanashi spine. Here, during normal operation after sheet joining is completed, the unwinding feeder 2r: The electric motor 1 that is driven uses a speed command signal from the line speed reference signal 10.

A signal from a speed detector 11 attached to the electric motor 1 and a signal from a redaper position detector 12 attached to the movable part of the redaper 4 are input to the position control calculator 11. The redaper position correction signal obtained by the calculator IJ is used to control the position of the redaper 4 to a fixed position.
The control is performed via the Lumi motor control device 14.

In addition, the speed command from the motor 5-wire line speed reference signal 10 that drives the feed-out lever # and the speed command from the motor 5 are set to the motor control unit 16 so that the speed is the same as that of the 9-speed detector 16. ) controlled. When replacing the three-way unwinder, stop the unwinding feeder J, and reduce the stroke between the movable part 4 and the fixed part 4B of the redeper 4 to reduce the amount of sheet material retained in the redeper. 4. Supply the sheet material stored in 4 to 2-in. Since the ζ width changes, it cannot be used as a product, and furthermore, even if it passes through a machine that is nipped by the d unwinding feedhole and the unwinding axle 60 (fourth rule), it may cause a shock to the machine. If this happens, problems such as tearing of the sheet material may occur.For this reason, it is necessary to detect the position of the joint in advance and take steps to release 2.f or reduce the pressure of the egg when it passes through the error.

Conventionally, to detect the joining position of such sheet materials, a special photoelectric device or a sonic detector was used to detect the joining position by installing it immediately before the delivery roll d. Ru. Further, in addition to the redaper position detector 12 used to control the electric motor 1, a redaper amount detector 18 is provided which can perform wide-range detection that can cover the entire stroke of the redaper 4, and its detection signal is sent to the loop amount calculator 19.
There is also a system in which the bonding position output counter 21 is reset when the tie-building circuit 20, which outputs the timing immediately before restarting the unwinding feed roll 2.6 operation after the bonding operation, is activated. In this way, after the unwinding tweed four wheel 2 starts operating, the length of the sheet material is determined by the greasing value of the welding position detection counter 21). The joining position can be detected by subtracting the signal. However, in the former method a, *
In addition to requiring a special position detector 11f, the sheet material
thickness.

Even if the line detection is difficult due to the bonding method, etc., the operation is uncertain. In addition to the latter method, in addition to the control position detector 11 having a wide detection area, is it necessary to provide a redate amount detector JJtt for detecting the redate amount and to provide its mounting mechanism?] Mechanical structure There are 59 drawbacks such as the complexity of the process.

Honji 1jli Co., Ltd. has developed a sheet material joining position detection device tt- which was developed in view of the above circumstances and is capable of reliable operation, does not require a complicated mounting mechanism, and can detect the joining position of sheet materials with high accuracy. The purpose is to provide.

Hereinafter, one embodiment of the present invention will be described in detail with reference to a front view showing the redeper mechanism shown in FIG. 3 and a block diagram shown in FIG. 4. In other words, the relationship between the stroke amount of the reservoir, Δ4, the base point, and the joining position is as shown in FIG. The length of the sheet material between the joining part of the new and old sheet materials joined by the machine 9 and the base point X1 has the stroke m of the redeper and the length 0III. That is, the length jl of the sheet material stored in the redeper is given by the following equation 1).

j1 proverb x 2(m-υ+z (2n-1) 10k
・・・・”・”・1) However, the four dimensions of the data base,
Redeper fixed foot part roll number m (pieces), Redeper movable part roll number m-1 (pieces), Redeper movable part and fixed part roll diameter D (ffl), sheet material length stored in Redeper 11% roll winding angle Also, for correction by.

Assuming that the distance from the base point x1 to the redeparator exit is j, and the distance from the splicer 9 to the redeper inlet is J, the total length I of the sheet material from the splicer 9 to the base point X1t is given by the following equation 2).

4M"ll +j, +J, ...
・・・・・・・・・・・・ 2) Therefore, the joining part of the sheet material and the base point X! The position of the joining point can be clearly detected from the sheet length between
Even if Xn is required, it is easy to have multiple detection points by measuring the distance between base point x1 and detection point x3...XI&. FIG. 4 is a facsimile diagram showing one embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals and their explanation will be omitted. A signal from a control position detector 12 attached to the redeper 4 is inputted to the motor control device 14 via a position detection calculator 11 during normal operation. Then, the signal from the twin speed reference 10, the feedback signal from the speed detector 11, and the f shown in Figure 1
vx, the position of the redaper 4 is controlled in the same manner as in the figure above, and the movable part 4A of the redaper 4 is controlled to be in the foot position near the upper limit position. The feeding of the sheet material 1 on the unwinding reel 3 has stopped.

When the reel needs to be replaced, the delivery feed roll 2 is stopped, and the tip of the sheet material a from the new unwinding reel JA is
(by a splicing machine 9) to the tail end of the old sheet material 10. During this operation, that is, while the unwinding feeder 2 is stopped and the supply of the sheet material 7.8 from the unwinding reels J, J is stopped.

The following company, Guta Sesrai YK, continues to supply the mourning sheet material r-tube stored in Redeper 4. Replacement of unwinding reel and new
The joining of the old sheet material 1.8 has been completed, and the redeper movable part 4m has been installed near the lowest position. Jt,
) When the position detector 1j using a switch is operated, its detection signal is given to the timer circuit 20. Then, based on this output signal, the distance between the joint position and the base point set in the joint position detection force printer JJK and /4 ear setting circuit 24 is given via the switch and the JGT-, and the distance is preset. Restart feed roll j. FIG. 5 is a time chart explaining the operation (- indicates the reserve amount of the redeper.

(b) is the unwinding feed roll speed, (@) is the unwinding roll speed, (the phrase is the unwinding reel exchange time, (・) is the operation of the position detection ξ button switch 25, (f) is the position detection The counter value is shown. Therefore, the installation position of the position detector 25 should correspond to the preset lower limit value of the reserve amount, as shown at point B in Fig. 5(a), and when the reserve amount is the point at which the unwinding feed roll stops. After that, the time required to reach this lower limit is the time required to change the unwinding reel, ts-4. When the feed rule 2 is restarted, the feedback signal detected by the speed detector 1j attached to the drive motor 5 of the feeding roll 6 is subtracted from the initial value of the welding position detection counter 2J, so this preset value will be used from now on. %/ Then, at t1 in FIG. 5, the stop tube of the drive motor 1 of the unwinding feed roll PI 3 l starts to stop at q tl. At the same time, the amount of glue boots in Redeper 4 starts to decrease t.The time between t and 1 is the time for exchanging the unwinding reel and joining the old and new sheets.For example, even if the exchange is finished at ts', the unwinding feed continues until ts The roll continues to stand by, and when the reserve amount decreases to the lower limit value at tl, the position detection limit switch 25 operates and resets the value Yrf, which corresponds to the amount of glue boot of the redeper 4 to the 1 position detection force Kunta 25, and at the same time Therefore, the period from ts to ti is the acceleration time of the first reel feeder 2, and the period from ta to ti is the recovery time of the amount of sludge in the taper taper 4. This is the detection point through which the joint passes. Therefore special photoelectric detector,
Since a special detector such as a sonic detector is not used and a liquid switch is only required to be provided on the machine side, the joining position of the sheet materials can be detected with high precision without the need for a complicated mounting mechanism.

The motor control device may be any system that enables variable speed operation, and although the speed detector was explained for equipment with digital output such as a delta pulse transmitter, it may be a tachometer generator or a speed converter. It goes without saying that combinations such as the above are also possible.

Also, the joining position detection counter 25 performs a counting operation in one direction! This can be achieved by using a reset counter.Also, if there are multiple detection points, measure the base point, which is a constant specific to the mechanical system, and the sheet material length at each detection point, and set the multi-stage greasing to the above-mentioned joining position detection counter. This can be easily handled by sequentially resetting the above measured values using .

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a conventional position detection device, Fig. 2 is a block diagram showing a conventional position detection device;
Figures (a) and (b) are cross-sectional views showing an example of the joints of sheet materials, Figure 3 is a diagram showing the mechanism of the redeva, and Figure 4 is 1.
FIG. 5, a block diagram showing one embodiment of the present invention, is a time chart explaining the operation of the above embodiment. 2... Unwinding feed proverb, J (JA)... Unwinding reel % 4-1 day x, g... feed! D output L roll, 9... Joining machine, J J-- Joining position detection counter. 25...Position detector. Applicant's representative Patent attorney Takehiko Suzue Figure 1 0 □ 42- Figure 2 Exit Xs

Claims (1)

[Claims] In a device that sequentially joins sheet materials and continuously sends them out, there is provided an unwinding feed roll that unwinds the sheet material wound into a roll, and a sheet supplied from this unwinding feed roll. A feed-out roll that sends out the material, and a V-zaper movable part that is provided between the unwinding feed link and the feed-out roll and moves toward and away from the redeper fixed part to accumulate the sheet material that passes through the 7-1 space. Redeper that controls the volume. A welding machine disposed upstream of this redeper to join sheet materials, a position detector that detects when the fixed part and movable part of the redeper have come close to the required position, and a detection operation of this position detector. In response, the length t of the path of the sheet material from the welding machine to the nine predetermined points is set, and a counting operation is performed in accordance with the feeding of the sheet material, and when this count value and the above-mentioned installation value match, the sheet material A bonding position detection device for sheet materials, comprising a bonding position detecting force for determining that the bonded portion passes through the base point.