JPH1032001A - Cutting control method for electrode plate precursor for lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting control method for an electrode plate precursor for a lead-acid battery capable of stably correcting the displacement of the position where a cutting blade is placed even if part of a lug of the electrode plate precursor lacks. SOLUTION: When a continuous sheet-shaped electrode plate precursor 3 to which a lead part 31 is formed at constant intervals is carried, a cutting preset portion 32 is cut with a cutting means 5 to manufacture an electrode plate 3A for a lead-acid battery, the position of the specified lead part 31 and the position of the specified blade 54 of the cutting means 5 are detected with a lead part position detecting means 71 and a blade position detecting means 72, the displacement between the position where the blade 54 of the cutting means 5 is actually placed and a presetting position is obtained from the time difference of the sending period of a lead part position detecting signal and a blade position detecting signal, and correcting operation for varying the operation speed of the cutting means 5 so as to correct the displacement is performed. When the lead part position detecting signal and the blade position detecting signal are not sent within the specified time, the correcting operation is omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the cutting of an electrode plate precursor for a lead-acid battery, and more particularly, to a method for cutting off an electrode plate precursor even if a signal from a lead position detecting means is interrupted. The present invention relates to a method for controlling the cutting of an electrode plate precursor for a lead storage battery, which can stably perform cutting control.

[0002]

2. Description of the Related Art An electrode plate used for a lead storage battery or the like is usually
A continuous sheet-like electrode plate precursor is prepared by filling the paste-like active material into a continuous grid made of expanded metal or a long lead manufactured by a continuous casting method, and then the precursor is transferred by a transfer unit. It is manufactured by being continuously cut at a predetermined location by cutting means arranged on the downstream side of the transport means.

Here, as shown in FIG. 1, a lead (hereinafter referred to as an ear) 31 serving as a current collecting part is fixed to one side edge 3a of the electrode plate precursor 3 as shown in FIG. It is formed at intervals. The electrode plate precursor 3 is cut at a portion separated from the ear 31 by a predetermined dimension (a scheduled cutting position) in a direction orthogonal to the longitudinal direction of the electrode plate precursor 3. That is, the cut portion 32 of the electrode plate precursor 3 is set at a portion separated from the ear 31 by a predetermined dimension, and the electrode plate precursor 3 is cut so that the ear 31 is at the predetermined portion. It is divided into rectangular electrode plates 3A (one by one) located one by one.
In addition, a cutting allowable range 32a having a predetermined width is
Is set, and the electrode plate 3A obtained by inserting the blade of the cutting means into the cutting allowable range 32a is obtained.
Dimensions are kept within the design specifications.

As the cutting means, for example, a rotary cutter provided with a rotary drum having a plurality of blades mounted on an outer peripheral surface at regular intervals is used. This rotary cutter rotates in conjunction with the conveying means, and includes:
By introducing the electrode plate precursor transported by the transporting means, the electrode plate precursor is cut at regular intervals. At this time, the rotary cutter is previously provided with a plurality of blades at intervals of one electrode plate, that is, at the cut portions 32, 32.
Attach it with an interval corresponding to the size between them,
It is possible to continuously adjust the position where the electrode plate precursor is to be cut (within the allowable cutting range) 32 and the position where the blade of the rotary cutter is actually inserted (hereinafter referred to as a sword insertion position) in synchronization with each other. The electrode plate precursor is cut at a predetermined interval to obtain an electrode plate having a predetermined size.

[0005] When an expanded metal is used for the continuous lattice, the dimensions of the continuous lattice may vary slightly depending on the degree of expansion during expansion. Further, when the continuous lattice is manufactured by a continuous casting method, due to differences in various conditions such as the temperature and cooling rate of molten lead, or fluctuations in tension applied after continuous casting, the dimensions of the obtained continuous lattice may be slightly reduced. Variations may occur. For this reason, the distance between the cut portion of the obtained electrode plate precursor and the ear may vary.

[0006] Such a dimensional variation is an extremely small dimensional error for each electrode plate, but a large error for the electrode plate precursor. Therefore, the electrode plate precursor is cut continuously. As the cutting progresses, the dimensional error gradually increases, and eventually, there may be a problem that the cutting position gradually shifts from a regular cutting position. When such inconvenience occurs,
In the obtained electrode plate, problems such as a decrease in dimensional accuracy and a difference in the position of the ear for each electrode plate occur, so that a large number of defective products are generated, and the yield in electrode plate production is reduced.

[0007] In order to suppress the occurrence of the inconvenience, usually, the position of the ear and the position of the blade of the rotary cutter are respectively detected, and these are synchronized so as to synchronize with a predetermined positional relationship.
The cutting is performed while adjusting the rotating speed of the rotary cutter and correcting the cutting position so that the blade is inserted into a cutting position (within a cutting allowable range) of the electrode plate precursor. Here, a method of manufacturing the lead storage battery electrode plate while correcting the shift of the cutting position will be described with reference to the accompanying drawings.

FIG. 2 shows an electrode plate manufacturing apparatus 10 in which a first transport means 4 for transporting an electrode plate precursor 3, a cutting means 5 arranged downstream of the first transport means 4, Driving means 6 for driving the conveying means 4 and the cutting means 5, the edge position detecting means 71, the blade position detecting means 72, the speed detecting means 73 for detecting the conveying speed of the electrode plate precursor, the ear position detecting Means 71,
A cutting control unit 2 for controlling the operation of the cutting means 5 based on the detection results from the blade position detecting means 72 and the speed detecting means 73, and a cutting control unit 2 for cutting the electrode plate precursor 3 and transporting the electrode plate 3A divided therefrom. 2 transport means 8.

The conveying means 4 is a belt conveyor, and a transmission 6 attached to a rotating shaft 64 of the driving means 6 described later.
The drive roller 41 connected to the drive shaft 63 derived from the belt 2 is pressed against the belt 42, and the rotation of the roller 41 drives the belt 42, and the belt 42
The transported object (electrode plate precursor) 3 placed on the substrate is transported toward the cutting means 5.

The cutting means 5 is a rotary cutter having a pair of rotary drums 51, and is arranged such that the rotation axis is orthogonal to the direction of transport of the electrode plate precursor 3 placed on the driving means 4. The rotating drum pair 51 includes two rotating drums 52,
53 are arranged with their outer peripheral surfaces facing each other, and the blade 54 is attached only to the outer peripheral surface 52 a of one of the rotary drums 52.

A plurality of blades 54 of the rotary drum 52 are attached to the outer peripheral surface 52a of the drum 52. That is, the blade 54 is disposed so as to be orthogonal to the transport direction of the long electrode plate precursor 3. At this time, the interval between the blades 54 is the same as the cutting dimension L (see FIG. 1) of the electrode plate 3A. That is, a plurality of blades 54 are mounted on the drum outer peripheral surface 52a with a dimension corresponding to one electrode plate therebetween.

The rotating drum 52 is connected to a driving shaft 66 derived from a transmission 65 mounted on a rotating shaft 64 of the driving means 6 described later. The transmission 65 is provided with a stepping motor 67 for changing the gear ratio. The rotating drum 53 is arranged to rotate in reverse with a rotation of the rotating drum 52 via a gear (not shown), and has no blade on its outer peripheral surface 53a. When the body 3 is inserted between the pair of rotating drums 51, the outer peripheral surface 53a functions to support the electrode plate precursor 3 from below.

The driving means 6 is a main motor 61 having a rotating shaft 64, and drives the conveying means 4 and the cutting means 5 via transmissions 62 and 65. That is, the transport means 4 and the cutting means 5 are driven by one main motor 61, and these are interlocked with each other. As the ear position detecting means 71, a contact type sensor is usually used.

The contact type presence / absence sensor 71 is, for example, an ear detection contact dog 71a provided with a limit switch as shown in FIG. 2, and the ear detection contact dog 71a is arranged at a place where the ear 31 passes. When the contact comes into contact with the contact dog 71a, the contact dog 71a moves so that a limit switch attached to the contact dog 71a is turned on, and a pulse signal (ear position detection) generated when the limit switch is turned on Signal) to detect the position of the ear.

As the ear position detecting means 71, for example, a non-contact type presence / absence sensor may be used in addition to the contact type. The non-contact type presence / absence sensor includes a light emitting unit and a light receiving unit facing each other, and has a structure in which light emitted from the light emitting unit is received by the light receiving unit. It is designed to transmit a pulse signal when it is received. Therefore, when an ear to be detected is passed between the light emitting unit and the light receiving unit, a pulse signal is transmitted when the light is blocked by the ear, and the pulse signal (ear position detection signal) causes the ear signal to be transmitted. Detect the position of.

As the blade position detecting means 72, for example, a blade contact dog 72a having a limit switch is used. That is, similar to the case of the ear detection contact dog 71a, the blade detection contact dog 72a is arranged at a position where the blade 54 passes,
When the blade 54 contacts the contact dog 72a, the contact dog 72a
Is moved and a limit switch attached to the contact dog 72a is turned on, and the position of the blade is detected by a pulse signal (blade position detection signal) generated when the limit switch is turned on.

As the speed detecting means 73, for example, a tacho generator for detecting the rotational speed of the main motor 61 is employed, whereby the transport speed of the electrode plate precursor 3 is grasped from the rotational speed of the main motor 61. You. In this case, the belt conveyor 4, which is a conveying means, and the electrode plate precursor 3 placed thereon move integrally, and the main motor 61 that drives the belt conveyor and the conveyance speed of the electrode plate precursor. It is assumed that the rotation speed is proportional to the rotation speed of the motor.

As shown in FIG. 3, the cutting control unit 2 includes an acceleration / deceleration control unit 75, a time difference calculation unit 76, and a calculation control unit 77, and sends a drive signal to the main motor 61 and It functions to control the operation of the cutting means 5 based on the detection results from the position detecting means 71, the blade position detecting means 72 and the speed detecting means 73. Acceleration / deceleration control unit 75
Is a part for controlling the speed at the time of starting / stopping of the main motor 61, and sends a command to the input set speed to the arithmetic control unit 77.

The time difference calculating section 76 includes an ear position detecting means 71.
Timing of the ear position detection signal and the blade position detection means 72
This is a part for calculating the time difference from the transmission timing of the blade position detection signal from the CPU, and sends the calculation result to the calculation control unit 77. The arithmetic control unit 77 functions to generate a drive signal for driving the main motor based on a set speed command from the acceleration / deceleration control unit 75. The arithmetic control unit 77 also outputs information on the calculation result of the time difference from the time difference calculation unit 76 and the speed detection. Main motor 6 from means 73
1 based on the rotation speed information, and sends a control signal based on the calculation result to the stepping motor 67,
It functions to change the speed ratio of the transmission 65 and control the operation of the cutting means 5.

The second transport means 8 is arranged downstream of the cutting means 5 and transports the electrode plate 3A obtained by cutting the electrode plate precursor 3 by the cutting means 5 to a subsequent process. It is a belt conveyor. The belt conveyor 8 is driven by driving means (not shown). In the electrode plate manufacturing apparatus 10, the electrode plate precursor 3 is placed and conveyed on the belt conveyor 4, introduced between the rotating drum pairs 51 of the rotating rotary cutter 5, and continuously cut.

At this time, the ear position detecting means 71 detects the ear position when the ear 31 of the electrode plate precursor 3 being conveyed passes, transmits the information as an ear position detection signal, and performs cutting control. Input to unit 2. Blade position detecting means 72
Detects the blade position of the rotating rotary cutter 5 when the blade 54 passes, and inputs the information to the cutting control unit 2 as a blade position detection signal. The speed detecting means 73 detects the rotation speed of the main motor 61 and inputs the information to the cutting control unit 2.

Here, the ear position detecting means 71 determines the position where the blade 54 of the rotary cutter is actually inserted into the electrode plate precursor 3 (cutting position) and the preset cutting position of the electrode plate precursor 3. At the point in time when the position of the ear is synchronized with the position of the predetermined ear 32, the position of the predetermined ear located upstream of the scheduled cutting point 32 is detected. Further, the blade position detecting means 72
Is disposed at a position where the position of a predetermined blade other than the blade actually inserted in the electrode plate precursor can be detected at the time when the above-described cutting position and the scheduled cutting position are synchronized. That is, the ear position detecting means 71 and the blade position detecting means 7
2 means that when the pulse signals (ear position detection signal and blade position detection signal) of both of them are turned on within a predetermined time, the cut portion 32 of the electrode plate precursor 3 and the blade 54 of the rotary cutter are actually inserted. The position (sword insertion position) is synchronized with the position, and is disposed at a position where normal cutting is performed. In other words, if each pulse signal (ear position detection signal and blade position detection signal) is transmitted within a predetermined time from the ear position detection means 71 and the blade position detection means 72, the cutting at a predetermined cutting scheduled place is performed. It is possible to obtain an electrode plate with high dimensional accuracy. However, if the transmission timings of these pulse signals (ear position detection signal and blade position detection signal) are shifted, the cutting is not performed at a predetermined cutting scheduled portion, and the dimensional accuracy of the obtained electrode plate is reduced.

Therefore, if the timing at which the ear position detection signal and the blade position detection signal are issued is shifted, the rotational speed of the rotary cutter is changed so that the ear position detection signal and the blade position detection signal are synchronized. The rotation speed is adjusted to correct the state where the normal cutting is performed in which the scheduled cutting position matches the cutting position. At this time, the difference between the ear position detection signal from the ear position detection means 71 and the blade position detection signal from the blade position detection means 72 is caused by the position where the cutting target portion 32 of the electrode plate precursor 3 is cut and the position where the blade 54 is actually inserted ( If the time difference between the ear position detection signal and the blade position detection signal transmitted from the ear position detection means 71 and the blade position detection means 72 is detected, the sword insertion is performed. The shift between the position and the scheduled cutting position can be grasped.

Here, a control method when the above-described correction is performed by the cutting control unit 2 will be described below. That is, in the cutting control unit 2, first, the set speed setting signal is applied to the acceleration / deceleration control unit 7 for controlling the speed at the time of start / stop.
5, a driving signal is output from the arithmetic control unit 77 to the main motor so that the main motor is driven at the set speed. Then, the main motor 61 is driven, and the electrode plate manufacturing apparatus 10 operates.

With the operation of the electrode plate manufacturing apparatus 10, the transporting means 4 is driven, the electrode plate precursor 3 is transported, and the rotary cutter 51 is rotated. At this time, a pulse-like ear position detection signal as shown in FIG. 4 is transmitted from the ear position detection means 71 as the ear passes, and the ear position detection signal is input to the time difference calculation unit 76.

The blade position detecting means 72 also detects the position of the blade 54, transmits a pulse-like blade position detection signal as shown in FIG. 4, and sends the blade position detection signal to the time difference calculating section 76. Is entered. The time difference calculating unit 76 calculates a time difference between the transmission timing of the ear position detection signal and the transmission timing of the blade position detection signal. That is, the ear position detection signal and the blade position detection signal in FIG. 4 are compared.
Then, the calculation result is sent to the calculation control unit 77.
The time difference calculating unit 76 receives the blade position detection signal and the ear position detection signal, calculates the time difference between these signals,
The mechanism is reset when the calculation result is output. Therefore, the blade position detection signal and the ear position detection signal are input one by one, the time difference between them is calculated, and when the calculation result is output, the reset is performed and the calculation unit is in a clear state. . Thereafter, the next blade position detection signal and ear position detection signal are input to the clear time difference calculation unit 76, the next calculation is performed, and when the calculation result is output, reset is performed again. Such an operation is repeated, and the time difference between the ear position detection signal and the blade position detection signal is continuously obtained.

In the arithmetic control unit 77, the relationship between the cutting position and the cutting position of the electrode plate precursor is grasped based on the arithmetic result from the time difference arithmetic unit 76. That is, the time difference corresponding to the difference between the cutting position and the scheduled cutting position,
On the basis of the rotation speed of the main motor 61 sent from the speed detecting means 73, a deviation (hereinafter referred to as a sword insertion position) between the scheduled cutting portion 32 of the electrode plate precursor 3 and a position where the blade 54 is actually inserted (sword insertion position). (Referred to as the length of the position shift), and a specific length of the blade insertion position shift is obtained.

In the case where the length of the cutting position deviation obtained as described above is 0, that is, when the cutting position matches the planned cutting position of the electrode plate precursor, the cutting is continued as it is. Done. That is, no control signal is transmitted from the arithmetic control unit 77, and no correction is performed. On the other hand, when the length of the cut position is larger than a certain value, the length of the cut position is set to 0. A control signal is sent to the stepping motor 67 so as to change the rotation speed of the rotary cutter 5 by an amount corresponding to. That is, the stepping motor 67 is rotated in either the forward or reverse direction by the control signal, and the speed ratio of the transmission 65 on the rotary cutter side is increased or decreased with the rotation, whereby the rotation speed of the rotary cutter 51 changes. Then, correction is performed so that the blade 54 is inserted into the scheduled cutting portion 32 (within the allowable cutting range) of the electrode plate precursor 3, and the cutting is performed in a normal state.

The relationship between the blade position detection signal, the ear position detection signal, and the control signal transmitted based on the time difference between the transmission timings will be described in more detail with reference to FIG. That is, at the time point a and the time point b in FIG. 4, the blade position detection signal and the ear position detection signal are in agreement, and the cutting position and the planned cutting position are in the same state. No correction is made. Therefore, no control signal is transmitted at time points a and b.

Since the blade position detection signal is later than the ear position detection signal at time points c and d, control is performed to increase the speed of the rotary cutter in order to advance the cutting position. That is, at time points c and d, a control signal (+ side signal) for speed increase is transmitted. In addition, + of the control signal indicates acceleration, and-indicates deceleration, and the intensity of the control signal is proportional to the degree of acceleration and deceleration.

At time e, since the blade position detection signal is ahead of the ear position detection signal, control is performed to decelerate the rotary cutter to delay the cutting position.
Therefore, at the time point e, a control signal for deceleration (a negative signal) is transmitted. At the time point f, the blade position detection signal is significantly delayed from the ear position detection signal (the time delay is larger than the time points c and d), so that the rotary cutter is moved by the rotary cutter to advance the cutting position. Control is performed to increase the speed as needed to eliminate the error. Therefore, at the time point f, a control signal for increasing the speed (a signal on the positive side) having a higher intensity level than the time points c and d is transmitted.

At the time point g, the blade position detection signal has advanced considerably more than the ear position detection signal (the advance is greater than the time point e), so that the rotary cutter is moved to the large advance in order to delay the cutting position. Control is performed to decelerate as much as necessary to cancel. Therefore, at time g,
A control signal for deceleration (a signal on the negative side) having a higher intensity level than the time point e is transmitted.

[0033]

By the way, in the electrode plate precursor 3, some of the ears are damaged, and as shown in FIG.
Ears may be missing from the normal position (33). The missing ears, for example, when expanded metal is used for the continuous grid, the ears are damaged during storage or transportation, some of the ears are missing, or in the case of continuous grids manufactured by continuous casting, This is caused by missing some ears due to poor casting.

As described above, if the ear that should have been present is missing, the ear position detecting means 71 cannot detect the ear 31 in the missing part. As described above, there is a disadvantage that the ear position detection signal is not transmitted at the ear position where the ear should have existed. Here, as described above, the time difference calculation unit 76 compares the blade position detection signal with the ear position detection signal, and resets when the calculation result is output, so that the above-described inconvenience occurs. And the time difference calculation unit 76 receives the position detection signal of the ear next to the missing ear and outputs the calculation result of the ear position detection signal and the blade position detection signal corresponding to the missing ear. Sometimes it takes a reset. That is,
The time difference calculation unit 76 receives the blade position detection signal at the time point h, and then waits for the ear position detection signal to be input. At the time point i, the input signal detects the position detection signal of the ear next to the missing ear. Then, the time difference between these signals is calculated, the calculation result is output and reset is performed, and one calculation is completed. That is, the time difference calculating unit 76 mistakenly recognizes the ear next to the missing ear as the original ear, and as shown in FIG. 5, there is a deviation from the blade position detection signal at the time point h by one electrode plate. The ear position detection signal at the time point i is compared and calculated.

The calculation result is input to the calculation control unit 77, and calculation is performed to correct the misalignment of the cutting blade. As described above, the calculation result includes a shift of one electrode plate. Have been. For this reason, usually, the length of the cutting position misalignment of several mm or less suddenly has the length of the cutting position misalignment of several tens to hundreds of tens mm corresponding to the length of one electrode plate. In the arithmetic control unit 77, in order to correct it,
Control of a large operation amount is performed. That is, the arithmetic control unit 77 assumes that the cutting position has advanced by one electrode plate, and outputs a control signal for deceleration in an attempt to decelerate the rotary cutter to the maximum. However, in practice, there is a limit to the degree of deceleration, so that deceleration beyond the limit value cannot be performed, and during this time, the cutting position and the scheduled cutting position cannot be matched. That is, in order to correct the displacement of one electrode plate,
Until the normal state is restored, a large number of defective cutting products will be generated.

The present invention solves the above-mentioned problem when cutting the electrode precursor for a lead storage battery. Even if the ear of the electrode plate precursor is partially missing, the position where the blade of the cutting means can be inserted is provided. It is an object of the present invention to provide a method for controlling the cutting of an electrode plate precursor for a lead-acid battery, which can stably correct the deviation.

[0037]

In order to achieve the above-mentioned object, according to the present invention, a portion to be cut by a cutting means having a blade while conveying a continuous sheet-like electrode plate precursor provided with leads at regular intervals is provided. Are sequentially cut, and when manufacturing a lead-acid battery electrode plate, the position of the predetermined lead portion and the position of the predetermined blade of the cutting means corresponding to the lead portion in a predetermined positional relationship are respectively set to the lead portion. The position detection means and the blade position detection means detect the time difference between the transmission timing of the obtained lead portion position detection signal and the transmission time of the blade position detection signal, and from the time difference the position where the blade of the cutting means is actually inserted and the cutting In a method for controlling the cutting of a lead-acid battery electrode plate precursor for performing a correction operation of changing an operation speed of the cutting means so as to grasp a deviation from a scheduled portion and correct the deviation, the lead portion position detection signal And said blade position detection signal, if not originating within the predetermined time, the cutting control method for a lead storage battery plate precursor, characterized in that omitting a correction operation of the shift are provided.

In the method for controlling the cutting of the electrode plate precursor for a lead storage battery according to the present invention, when the position detection signal of the lead is not transmitted based on the lack of the lead, that is, after the blade position detection signal is transmitted. If the lead position detection signal is not transmitted within the predetermined time, the blade position detection signal corresponding to the missing lead is canceled, and the time difference at that time is not obtained. For this reason, the time difference between the blade position detection signal corresponding to the missing lead portion and the next lead portion position detection signal of the missing lead portion is not obtained, and a shift of one electrode plate occurs. The inconvenience of erroneously recognizing that a user has failed is avoided.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for controlling the cutting of an electrode plate precursor for a lead storage battery according to the present invention will be described with reference to the accompanying drawings. FIG. 6 shows a cutting control unit 1 to which the method of the present invention is applied. The cutting control unit 1 includes an acceleration / deceleration control unit 75
A logical product operation control unit 91 for calculating a logical product of the ear position detection signal and the blade position detection signal; a time difference calculation unit 76 for calculating a time difference between the ear position detection signal and the blade position detection signal; and a calculation control unit 77 And

The acceleration / deceleration control unit 75, the time difference calculation unit 76, and the calculation control unit 77 in the cutting control unit 1 are the same as those used in the conventionally used cutting control unit 2. Further, the cutting control unit 1 is attached to a conventionally used electrode plate manufacturing apparatus 10 instead of the cutting control unit 2. Therefore,
In the electrode plate manufacturing apparatus 10 to which the method of the present invention is applied, the first
Transport means 4, cutting means 5, driving means 6, ear position detecting means 71, blade position detecting means 72, speed detecting means 73, second
Is not different from that used conventionally.

The AND operation control section 91 includes an AND circuit,
A control circuit for controlling whether to output a reset signal based on the presence or absence of an AND signal transmitted from the AND circuit. In the AND operation control unit 91, first,
The ear position detection signal from the ear position detection means 71 and the blade position detection signal from the blade position detection means 72 are input to the AND circuit, and the logical product of the ear position detection signal and the blade position detection signal is obtained. At this time, in the AND circuit, when both the ear position detection signal and the blade position detection signal are input within a predetermined time, an AND signal is transmitted, and the ear is lost and the input is performed for a predetermined time. If the ear position detection signal is not input to the inside, no logical product signal is transmitted. Then, the control circuit outputs a reset signal to the time difference calculating section 76 only when no logical product signal is transmitted based on the result of the logical product operation of the logical product circuit.

That is, when the logical product signal of the ear position detection signal and the blade position detection signal is not transmitted, the logical product calculation control unit 91 sends a reset signal to the time difference calculating unit 76 to interrupt the calculation, and Functions to make the next operation possible. The operation of the cutting control unit 1 including such a logical product operation control unit 91 will be described below.

That is, when the logical product signal is not transmitted in the logical product calculation control unit 91 (when the ear is missing and the ear position detection signal is not transmitted), the time difference calculation unit 76 is used.
Is reset, and the blade position detection signal at that time is canceled. For this reason, since the calculation result of the time difference is not output from the time difference calculation unit 76 to the calculation control unit 77, the control signal is not output from the calculation control unit 77, and as a result, the deviation between the cutting position and the scheduled cutting position at that time. Is omitted. On the other hand, when the logical product signal is transmitted from the logical product calculation control unit 91, the reset signal is not output to the time difference calculation unit 76, and the time difference calculation unit 7
6 calculates the time difference between the blade position detection signal and the ear position detection signal, and outputs the calculation result to the calculation control unit 77.
The control signal is output from the arithmetic control unit 77, and the operation of correcting the deviation between the cutting position and the planned cutting position is performed.

Next, the cutting control unit 1 according to the present invention
A procedure for cutting a lead storage battery electrode plate using the electrode plate manufacturing apparatus 10 having the above will be described. First, a long continuous grid manufactured by a continuous casting method and provided with a large number of leads (ears) at predetermined intervals on one side edge is prepared.
Then, an active material mixture is filled and applied to the continuous lattice using, for example, an active material filling device to produce a continuous sheet-shaped electrode plate precursor 3 supporting the active material mixture. At this time,
The active material mixture is, for example, a mixture of lead sulfate that is made into a paste by adding dilute sulfuric acid to lead oxide powder.

The electrode plate precursor 3 is placed on a belt conveyor 4 as shown in FIG. 2, and is conveyed to a rotary cutter 5 located on the downstream side. The two rotating drums 52 and 53 of the rotary cutter 5 are rotating in opposite directions to each other, and the electrode plate precursor 3 to be cut, which is conveyed by the belt conveyor 4, is inserted between the rotating drums.
Then, with the rotation of the rotating drum, the electrode plate precursor 3
By being drawn between the two rotating drums 52 and 53 and being cut into the electrode plate precursor 3 by the blade 54 of the rotating drum 52, the cutting is continuously performed at a predetermined interval 32 at regular intervals.

Here, the cutting position is corrected by the following method. That is, first, the position of the ear 31 is detected by the ear detection contact dog 71a, and the ear position detection signal is input to the cutting control unit 1. Also, the blade detection contact dog 7
2a, the position of the blade 54 of the rotary cutter 51 is detected, and the blade position detection signal is input to the cutting control unit 1. Then, the rotation speed of the main motor 61 at that time is detected by the tachogenerator 73, and the detected speed signal is input to the cutting control unit 1.

In the cutting control unit 1, first, the logical product of the ear position detection signal and the blade position detection signal is obtained by the logical product operation control unit 91. The relationship among the blade position detection signal, the ear position detection signal, the logical product signal, and the control signal at this time will be described in detail with reference to FIG. First, at time j and k in FIG. 7, since there is no missing ear and both the ear position detection signal and the blade position detection signal are transmitted substantially simultaneously, a logical product signal is transmitted. When the logical product signal is transmitted, the reset signal is not output. Therefore, the time difference calculating unit 76 calculates the time difference between the blade position detection signal and the ear position detection signal as it is, and the calculation result is calculated by the calculation control unit. 77 is input. Arithmetic control unit 77
Then, the time difference is the tachogenerator 73 at that time.
Is calculated as the length of the cutting position deviation based on the speed signal from the blade. At this time (time points j and k), the transmission timings of the ear position detection signal and the blade position detection signal coincide with each other, and the cutting position shift length is 0, so that no control signal is transmitted.

Next, at the time point m, the ear is missing, and the ear position detection signal has not been transmitted within a predetermined time after the transmission of the blade position detection signal. Therefore, the AND circuit of the AND operation control unit 91 does not transmit the AND signal. Therefore, a reset signal is output from the AND operation control unit 91 to the time difference calculation unit 76, and the time difference calculation unit 76 is reset. That is, the blade position detection signal at the time point m is canceled. Therefore, the time difference calculation unit 76 does not calculate the time difference, and does not output a control signal from the calculation control unit 77. That is, at the time point m, the operation of correcting the cutting position shift is omitted, and the cutting control of the electrode plate precursor is not performed.

After the time point n, there is no missing ear and both the ear position detection signal and the blade position detection signal are transmitted.
An AND signal is also transmitted. For this reason, the insertion position deviation length is calculated in the same manner as at the time points j and k, and further calculation is performed so that the obtained calculation value becomes 0, and control for changing the rotation speed of the rotary cutter 51 is performed. A signal is emitted. The control signal is sent to the stepping motor 67, and the stepping motor 67 is operated by the control signal to increase or decrease the speed ratio of the transmission 65 on the rotary cutter side. In this way, the rotation speed of the rotary cutter 5 is adjusted so that the displacement length becomes zero, and control is performed so that the blade of the rotary cutter is put within the allowable cutting range of the electrode plate precursor 3.

In the above description, the predetermined time means that after receiving the blade position detection signal, if the ear position detection signal is not received within the predetermined time, it is determined that the ear is missing and a reset signal is output. This is the reference time for performing In the present invention, the predetermined time is a period of time from when the ear position detection signal is received to when the ear position detection signal is received again in normal times (when the electrode plate precursor is transported the length of one electrode plate). 2/3). Here, the predetermined time varies depending on various conditions such as the size of the electrode plate and the driving speed of the electrode plate manufacturing apparatus.
In the case of an electrode manufacturing apparatus that manufactures 267 electrode plates per minute, the time required for the electrode plate precursor to be transported the length of one electrode plate is 225 msec. 2, 150 msec is the predetermined time.

Thus, the method of the present invention lacks the ear,
When the ear position detection signal is not transmitted, the blade position detection signal corresponding to the missing ear is canceled, so that the inconvenience occurred in the conventional cutting control method, that is, the blade position detection signal corresponding to the missing ear. And the time difference between the ear position detection signal of the ear next to the missing ear and the ear position detection signal can be calculated, and the cutting control unit can be prevented from erroneously recognizing that one electrode plate is shifted.

In the electrode plate manufacturing apparatus 10 provided with the cutting control unit 1, the electrode plate precursor 3 is cut into a predetermined size while the above-described control for correcting the misalignment is performed, and the electrode plate precursor 3 is cut one by one. It becomes the electrode plate 3A. The obtained electrode plate 3A is
After that, it is conveyed to the subsequent process by the second conveying means 8. In addition, the cutting control method of the present invention performs control to correct the misalignment of the cutting position only when the ear position detection signal and the blade position detection signal are transmitted within a predetermined time. If the call is not sent within the predetermined time, the control to correct the misalignment of the sword will be cut off only then.
Actually, since the electrode plate precursor moving at high speed is cut by the rotary cutter also rotating at high speed, even if the control is temporarily turned off, the cutting position does not shift significantly there. . Then, when the next ear reaches the position of the ear position detecting means and the ear position signal is transmitted, the control of the insertion position deviation correction is performed again, and the cutting in a normal state is continued. For this reason, in the method of the present invention,
Due to the lack of the ear, the disadvantage that the cutting control unit malfunctions, the cutting position is largely shifted, and a large number of defective products are avoided.

By the way, in the cutting control method of the present invention described above, when the electrode plate manufacturing apparatus is operating in a steady state, that is, when the position of the ear of the electrode plate precursor and the position of the blade of the rotary cutter are predetermined. This is a control method effective when the ear position detection signal and the blade position detection signal are transmitted almost simultaneously at the same time. However, when the electrode plate precursor is set in the cutting device at the start of the cutting device, when the position of the ear of the electrode plate precursor and the position of the blade of the rotary cutter are set so as to have a predetermined positional relationship. Good, but there are cases where the ear position and the blade position are not in a predetermined positional relationship. Then, the timing at which the ear position detection signal and the blade position detection signal are transmitted is shifted, and the same state as the state in which the ear is missing and the ear position detection signal is not transmitted at the time when it should be transmitted. Become. If the above-described cutting control method of the present invention is employed in such a state, the ear position detection signal and the blade position detection signal are not transmitted substantially at the same time, so that control is not performed. In other words, there may be a problem that control is not performed at the start. In order to eliminate such inconveniences, in the present invention, at the start of the electrode plate manufacturing apparatus, the time difference between the ear position detection signal and the blade position detection signal is constantly obtained as in the related art, and the cutting position deviation is corrected. A control is used to correct the cutting position deviation, and thereafter, when a steady state occurs in which the ear position detection signal and the blade position detection signal are transmitted substantially simultaneously, the method is switched to the cutting control method of the present invention.

The switching of the disconnection control method as described above is performed by a switch 93 provided between the output terminal 92 of the logical product operation control unit 91 and the time difference control unit 76. This is performed by selecting whether or not to input a reset signal) to the time difference calculating section 76 (see FIG. 6). That is, when the changeover switch 93 is on (closed), the reset signal from the logical product operation control unit 91 is input to the time difference calculation unit 76, and the blade position detection signal and the ear position detection signal are output for a predetermined time. The control is performed such that the reset is performed when the call is not transmitted.
When the changeover switch 93 is off (open), the reset signal from the AND operation control unit 91 is not input to the time difference operation unit 76.
Even if the blade position detection signal and the ear position detection signal are not transmitted within a predetermined time as in the related art, the time difference between them is calculated.

The operation of the changeover switch 93 is controlled by the acceleration / deceleration control unit 75. When the acceleration / deceleration control unit 75 issues a command to accelerate the driving means (hereinafter referred to as an acceleration command). Detects the acceleration command, turns off (opens) the time difference operation unit 76 and the output terminal 92 of the AND operation control unit 91, and sets the time difference operation unit 76 and the output terminal 92 of the AND operation control unit 91 to OFF. And do not connect. on the other hand,
When the electrode plate manufacturing apparatus is in a steady state and a command for driving the driving means at a constant speed (hereinafter, referred to as a constant speed command) is issued from the acceleration / deceleration control unit 75, the constant speed command is detected, and the time difference calculating unit 76 The connection with the output terminal 92 of the AND operation control unit 91 is made.

The procedure for manufacturing an electrode plate by switching the cutting control method in the electrode plate manufacturing apparatus 10 will be described below. In the electrode plate manufacturing apparatus 10, first, when the drive speed is set and the apparatus is started, an acceleration command is sent from the acceleration / deceleration control section 75 to the arithmetic control section 77, and the acceleration control section 77 accelerates the main motor 63. A signal is emitted,
The main motor 63 is accelerated to a set speed. In such an acceleration state at the start, the changeover switch 93
Detects an acceleration command, turns off (opens), and does not connect between the time difference calculation unit 76 and the output terminal 92 of the logical product calculation control unit 91. For this reason, in the time difference calculation unit 76,
The time difference between the transmission timings of the ear position detection signal and the blade position detection signal is always calculated, and based on the calculation result, control for correcting the misalignment of the cutting blade is performed. That is, the ear position and the blade position are out of the predetermined positional relationship, and as shown in FIG.
Even if the transmission timing of the blade position detection signal and the ear position detection signal are significantly different, control is performed in the same way as with the conventional cutting control method to maximize the speed of the rotary cutter and correct the deviation of the cutting blade position. Is performed. In this way, a large deviation of the insertion position is corrected during acceleration at the start of the device.

Next, when the driving speed of the driving means reaches the set speed and the electrode plate manufacturing apparatus 10 is in a steady state, the acceleration / deceleration control unit 75 issues a constant speed command. At this time, the changeover switch 93 detects the constant speed command and turns on (closes) to switch between connecting the time difference calculation unit 76 and the output terminal 92 of the logical product calculation control unit 91. Therefore, the output (reset signal) from the AND operation control unit 91 is input to the time difference operation unit 76, and the ear position detection signal and the blade position detection signal as described above are output within a predetermined time. The cutting control method of the present invention, which performs control for correcting the misalignment of the cutting blade only when the transmission is transmitted, is executed.

In the cutting control method of the present invention, when the signals from the ear position detecting means and the blade position detecting means are too short in time, it is preferable to extend each detection signal by a timer. Further, the cutting control method of the present invention,
As described above, even if the ear is lost in the steady state, the control is cut off at that time and the manufacture of the electrode plate is continued. In this case, it is sufficient if one or two ears are missing only once, but if the ears are continuously missing for some reason, it is inconvenient to continue manufacturing the electrode plate as it is. There is also. In such a case, since only the blade position detection signal is continuously input to the cutting control unit, it is preferable to add a function of detecting this state and issuing an alarm or stopping the electrode plate manufacturing apparatus. .

[0059]

As is apparent from the above description, the method for controlling the cutting of the electrode plate precursor for a lead-acid battery according to the present invention is performed when both the ear position detection signal and the blade position detection signal are transmitted within a predetermined time. Only the time difference between the transmission times of these detection signals is obtained.
That is, when the ear is missing and the ear position detection signal is not transmitted, the blade position detection signal corresponding to the missing ear is canceled, and the control for correcting the insertion position deviation is not performed.
For this reason, the time difference between the blade position detection signal corresponding to the missing ear and the position detection signal of the ear next to the missing ear is calculated, and it is erroneously recognized that a displacement of one electrode plate has occurred. Such inconvenience is avoided, and the generation of a large number of defective cutting products caused by the inconvenience can be suppressed. In other words, the method of the present invention is a cutting control method capable of stably performing cutting control even if ears are missing, and it is possible to minimize the occurrence of defective cutting even if ears are missing. It contributes to improving the yield in manufacturing.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an electrode plate precursor and an electrode plate.

FIG. 2 is a schematic configuration diagram of an electrode plate manufacturing apparatus.

FIG. 3 is a block diagram showing a configuration of a conventional cutting control unit.

FIG. 4 shows a blade position detection signal in a conventional cutting control method,
FIG. 5 is a diagram illustrating a relationship between ear position detection signals and transmission timings of control signals.

FIG. 5 is a diagram showing a relationship between a blade position detection signal, an ear position detection signal, and a timing of transmitting a control signal when an ear is missing in a conventional cutting control method.

FIG. 6 is a block diagram illustrating a configuration of a cutting control unit according to the present invention.

FIG. 7 is a diagram showing a relationship among a blade position detection signal, an ear position detection signal, a logical product signal, and a transmission time of a control signal in the cutting control method of the present invention.

FIG. 8 is a diagram showing a relationship among a blade position detection signal, an ear position detection signal, and a control signal transmission timing at the start of the electrode plate manufacturing apparatus.

[Explanation of symbols]

 Reference Signs List 3 electrode plate precursor 5 cutting means 31 lead part (ear) 32 scheduled cutting point 3A electrode plate 54 blade 71 lead part position detecting means 72 blade position detecting means

Claims (1)

[Claims] 1. A method for manufacturing a lead-acid battery electrode plate, wherein a continuous sheet-shaped electrode plate precursor having lead portions provided at a constant interval is conveyed, and a cutting section having a blade is sequentially cut at a cut-off portion to produce a lead-acid battery electrode plate. The position of the predetermined lead portion and the position of the predetermined blade of the cutting means corresponding to the lead portion in a predetermined positional relationship are detected and obtained by the lead portion position detecting device and the blade position detecting device, respectively. A time difference between the transmission timing of the lead position detection signal and the transmission timing of the blade position detection signal is determined, and a deviation between a position where the blade of the cutting means is actually inserted and the cutting scheduled portion is determined from the time difference, and the deviation is corrected. In the cutting control method of a lead storage battery electrode plate precursor performing a correction operation to change the operation speed of the cutting means, the lead portion position detection signal and the blade position detection signal,
A cutting control method for a lead-acid battery electrode plate precursor, wherein the operation of correcting the deviation is omitted when the transmission is not made within a predetermined time.