JPH0333476B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is capable of cutting an object to be cut, such as a wide band-like sheet such as paper or plastic film, or a wide paper tube for winding a wide band-like sheet, into a desired narrow width. The present invention relates to a method for changing the width of a slitter device that divides into slitters.

(Prior art) Conventionally, in a belt-shaped sheet slitter device, the current position of each blade that divides the sheet is detected and stored in advance as a distance from one reference point by a position detection device, and the sheet division specifications are determined. When changing, the operator selects the changed cutter and sets the required spacing between all the cutters, and the control device calculates the moving distance and direction from this set spacing and the current position of each cutter. A type that adopts a method of commanding the moving mechanism of the tool rest to move it to a predetermined position was proposed in Publication of Utility Model Publication No. 14158/1983 as ``Device for changing width of paper slitter''.

(Problem to be solved by the invention) However, according to the conventional method, when changing the width of the tool, the operator needs to decide which turret to place in the new position, and the time spent on this decision is It increases in proportion to the number of units and the complexity of the division specifications. In addition, since the rotational speed of the screw shaft that is turned for positioning movement must be relatively slow, accuracy will be poor, so there is a problem that the time required for positioning will vary greatly depending on how well or poorly you set which tool post to place in the new position. There is.

Moreover, because we are trying to shorten the time required for positioning, or because we neglect to consider the retraction position of blades that are not in use, many of the blades are concentrated in a specific part of the movement area of the tool rest. There is also the problem that the total time required when changing the margin is repeated many times.

(Means for Solving the Problems) Therefore, in the present invention, a plurality of tool rests each equipped with a blade are arranged in the width direction of the workpiece to cut the workpiece, and when changing the dividing width, a single turret is used. In a slitter device equipped with a corresponding tool post moving mechanism, each turret is moved by engaging the tool post with a screw shaft, and each tool post is provided with a moving distance measurement signal transmitting means. In the control device that receives the transmitting means, the arithmetic processing section determines the division position as a distance from the reference point based on the setting value for the division width or division position set in the setting operation section and the information stored in the storage section. When the number of turrets is larger than the number of divided positions, the position is the point where the interval is the widest among the mutual intervals of each divided position, and the position that equally divides the interval is calculated and stored in the storage unit. The distance from the reference point is calculated by the arithmetic processing unit, and the position calculated by the above calculation is not used for division, and is stored in the storage unit as the retractable position of the tool rest that can be retracted to that position, and the division position is By repeating the above calculation and memorization until the sum of the and retracted positions matches the number of turrets, the number of target positions corresponding to the number of turrets is determined as a distance from the reference point,
Based on the above calculation results, the required movement command signal is output from the output unit in order to perform positioning by matching the order of magnitude of distance from the reference point at each target position to the order of arrangement of the tool post. This is a characteristic feature.

(Example) The present invention will be explained below with reference to the illustrated example.

First, FIG. 1 is an explanatory diagram of an embodiment of the present invention.
FIG. 2 shows a side view of the turret when the present invention is applied to a slitter device for belt-shaped sheets. In this case, 1 is the tool rest, 2 is the reciprocating drive screw shaft, 3 is the rotational pulse generator which is a means for transmitting a moving distance measurement signal, and 4 is the control device. S is a belt-shaped sheet that is the object to be cut, 1a is a razor blade that is a cutting tool, 2a is a screw shaft drive device, 5 is a nut or female thread provided on each tool rest 1 that engages and disengages from the screw shaft 2, and 5a is the In the engagement/disengagement drive section,
Actually, it is incorporated into the tool post 1. In this case, the screw shaft 2, the screw shaft drive device 2a, the nut or female thread 5, and the engagement/disengagement drive section 5a constitute a tool post moving mechanism. The gear 3a at the end of the rotation shaft of the pulse generator 3 meshes with the rack 7 on the side of the common sliding base 6 of each tool rest 1, and rotates to generate a specific number of pulses per rotation of the gear 3a of the pulse generator 3. send.

The output signal from the control device 4 in FIG. 1 is a signal directed to the engagement/disengagement driving section 5a of each tool rest 1, and is an engagement/disengagement signal. Similarly, the output signal from the control device 4 is a signal directed to the screw shaft drive device 2a, and is a command signal for driving the screw shaft to rotate to the right or left. The input signal to the control device 4 is a turret movement measurement signal from each pulse generator 3. Further, the output signal from the control device 4 is a signal directed to each tool post 1, and instructs the cutter tool 1a to operate in either a cutting position or a rest position. In FIG. 2, the rest state of the cutter 1a is indicated by a dotted line. This is to prevent the blade 1a from damaging the band-shaped sheet S when it is not in operation, and since it is commonly used, its details will be omitted.

FIG. 3 is an explanatory diagram showing one embodiment of the control device 4. As shown in FIG. That is, this control device receives a setting operation section 8 for setting the division width or division position and operating the start and stop of the device, a signal set by the setting operation section 8, and an input signal, and converts the received signal to a suitable one for processing. an input unit 9 that converts the signal into a signal; a storage unit 10 that stores programs, the current position of each turret, and other information necessary for positioning; an arithmetic processing unit 11 that performs predetermined calculations based on instructions from the program; It consists of an output section 12 that outputs the calculated and determined procedure as a movement command signal for the required tool post, and the output section 1
Reference numeral 2 denotes an output section 12a that issues an engagement/disengagement signal to the engagement/disengagement drive section 5a of the nut or female screw 5, an output section 12b for driving a screw shaft that issues a command signal for forward/reverse rotation, etc. to the screw shaft drive device 2a; It consists of an output section 12c that issues a signal to command the cutting tool 1a of the tool rest 1 to take a cutting or resting position. Note that 19 is a display unit that displays the movement pattern of the tool rest, and uses, for example, a CRT display device.

FIG. 4 is an explanatory diagram showing a positioning procedure. Through such a procedure, the target position of each tool post is automatically calculated and the width of the tool is changed. Note that the setting conditions in this embodiment are based on the division width.

Therefore, first, based on the set new division width, this is calculated as the division position, and the interval between the division positions is also calculated (arithmetic processing unit 11). In this case, the five blades F, G, H, I, and J installed on the respective blade turrets are located at the positions indicated by broken lines in the drawing.
, change the cutting width based on the new division widths W1 and W2 (move to the solid line position). In this case, the division width is
Since they are W1 and W2, the actual division positions are F' and H'J'. 21 is a calculated arbitrary position and is a reference point. And each knife F, G, H,
The current positions of I and J (dotted line positions) are the reference point 21 above.
It is stored in the storage unit 10 as a distance from .
Also, the distance from the reference point 21 to the farthest point 23 of the turret movement area is lmm, and similarly the nearest point 2
If the distance to 2 is l ₀ , the movement area of the turret is lm
It can be calculated using −lo.

Therefore, first, the set division widths W1 and W2 are calculated for the division positions F', H', and J'. In this case, the dividing positions F', H', and J' are distances l1 from the reference point 21, respectively.
Find it as l2 and l3.

The distance is determined by l1=(lm-lo)-(W1+W2)/2+lo l2=l1+W1 l3=l2+W2. Split position as above
If F', H', and J' are determined as distances from the reference point 21, then the distance Δlo from the dividing position F' closest to the reference point 21 to the movement limit point 22 on the side closer to the reference point 21 is also calculated. Then, the distance Δlm from the dividing position J' to the movement limit point 23 on the far side from the reference point 21 is determined by Δlo=l1−lo Δlm=lm−l3.

Then, the obtained Δlo, Δlm, W1, and W2 are stored in the storage unit 10 as data. Note that the width of the division width in this case is assumed to be W1>W2>Δlm=Δlo. In the present invention, the retracted positions of blades that are not actually used (two in this case) are set at the center of the interval between the dividing positions determined based on the dividing width, starting from the position with the widest dividing width.

That is, while the number of target positions (division positions) determined based on the division widths W1, W2, Δlm, and Δlo stored as data is 3,
Since the number of turrets is 5, the two do not match.

Therefore, divide the widest W1 into equal parts, assume that the equally divided values W1/2 and W1/2 are the division widths, and use the division width data as W1/2, W1/2, W2, Δlm, and Δlo. It is stored in the storage unit as . The number of destination positions is now 4. However, the number of target positions and the number of turrets still do not match, so divide W2, which is the widest among W1/2, W1/2, W2, Δlm, and Δlo, into equal parts and calculate the value.
W2/2 and W2/2 are the dividing widths respectively, W1/2 and W1/2
, W2/2, W2/2, Δlm, and Δlo are stored in the storage unit as division width data. Now, the number of target positions (divided positions + retracted positions) and the number of tool rests match. In other words, the retraction position is found in the center of the division widths W1 and W2, and as a result, each division width is set in order from the left.
Δlo, W1/2, W1/2, W2/2, W2/2, Δlm.

Then, when the above-mentioned division width is replaced with the target position corresponding to the order of arrangement of each tool rest, the target position (divided position) of the tool rest F indicated by the broken line is F' located at a distance of l1 from the reference point 21. position (solid line position),
Target position of turret G (retracted position) indicated by the broken line
is the position of G' at a distance of l1' from the reference point 21, that is, l1 + W1/2 (solid line position), and the target position of the turret H (divided position) shown by the broken line is from the reference point 21.
The position of H' (solid line position) at a distance of l2, that is, l1 + W1/2 + W1/2, and the target position (retracted position) of the turret I, shown by the broken line, is from the reference point 21 to l2', that is, l2 +
The position of I' at a distance of W2/2 (solid line position) and the target position of the turret J (divided position) shown by the broken line are l3 from the reference point 21, that is, the position of J' at a distance of l2 + W2/2 + W2/2. This means the position (solid line position). Once the target position (divided position, retracted position) of each tool rest indicated by the solid line is determined, the target position is output to the output unit for positioning. The output unit 12a of the output unit 12 that has received the predetermined output compares the target position of the tool rest with the current position, and outputs the output unit 12a.
According to the rotational direction of the screw shaft output from b, an engagement command is output to the required tool rest in order to make the difference zero. Of course, since there is only one screw shaft 2, it is not possible to move rightward and leftward at the same time. Therefore, when the moving direction is both left and right, a rotation command is issued to the screw shaft drive device 2a to move in one direction, for example, rightward first (12a), and at the same time, the engagement is only applied to the tool rest that is to move rightward. command. When the positioning of the tool rest to move to the right is completed, the movement of the tool rest to move to the left starts. In this case, the moving tool post 1
From there, the movement distance measurement signal is sent every moment to the control device 4.
is input. Therefore, the control device 4 determines whether or not the difference has become zero, and issues a detachment signal to the tool post whose difference has become zero, that is, has reached the target position, to stop it, and sets the stop position to the current position of the tool. It is stored in the storage unit 10 as a position.

As is clear from the above explanation, the division width and target position are determined to correspond to all the turrets, regardless of the number of turrets actually used.In this case, from the left, F, G , H, I, J, attach the tool rest F to the dividing position F' to secure the dividing width of Δlo, and perform the same procedure to attach the other tool rests to the dividing position. . However, the actual required division width is ΔLo, W1, W2,
Since it is only Δlm, the tool rests G and I, which are in the retracted position, will be stopped.

By doing so, it is possible to prevent the position of the tool rest from shifting, and it is possible to ensure that the tool rest is always dispersed within the tool rest movement area. Therefore, it becomes possible to shorten the total operating time when changing the width repeatedly.

Note that although the number of blades and the number of divisions have been explained using one example, it goes without saying that other conditions can be handled using the same procedure. Furthermore, the target positions (retreat positions) of a plurality of unused tool rests may be found within the dividing width, which is particularly useful when the dividing width is very wide and the number of unused blades increases. It is valid.

FIG. 5 shows a side view of another embodiment of the applicable tool rest 1, for example, a rotating upper blade 24a and a lower blade 24.
This differs from the tool rest shown in FIG. 2 in that the belt-shaped sheet S is cut by the point b.

The present invention has been described above based on simple embodiments, but it goes without saying that the embodiments thereof may be modified and applied as appropriate by designers and other known techniques.
Further, it is also possible to change the cutting width in a manner that is more complicated than that in the embodiment.

Also, if you first rotate the screw shaft 2 at a relatively far rotational speed to roughly determine the required position of the turret, then reduce the rotational speed and slowly move the turret, the position will be determined by inertia. Positioning can be performed without errors and without spending a lot of time.

The current (operating) position of each tool or tool post is stored in the storage unit, but in addition, a reference position for each tool post is set within the movement area of the tool post, and the photoelectric switch is activated. If you use a proximity switch, tactile switch, etc. to confirm that each turret has passed its reference position, and set the count value of the counter at the time of this passage as the reference value, you can calculate the number of pulses added or subtracted from this. By comparing the distance from the reference point to the reference position with the distance known in advance, the current position of each tool post can be determined more accurately. Therefore, even if an error occurs, it is possible to once return each tool rest to the reference position, and accurate counting can be performed again. This return to the reference position is performed, for example, in an emergency or at the start of work.

The material of the belt-shaped sheet, which is an example of the object to be cut, does not matter, and various devices can be used, such as various winding devices and sheet processing devices. The material of the blade does not matter, and the blade can be a razor blade that cuts from one side, a push-cut blade that cuts from both sides, a shear blade, a rotary blade,
Doesn't matter if it's a fixed blade. Furthermore, when there are blades on both sides as described above, it is up to the designer to decide whether to position both sides using the present invention, or to position only one side using the present invention and have the other side follow suit. . A knife is a concept that includes not only a cutting blade in the narrow sense, but also laser beams, ultrasonic waves, high-pressure water streams, etc., and refers to something that has cutting ability.

(Effects of the Invention) As explained above, according to the present invention, the positioning of the tool rest can be quickly and automatically performed, regardless of whether the operator is skilled or unskilled at setting the turret. It can prevent the unevenness of the structure.
In other words, when the number of turrets is large compared to the number of divided positions, the distance from the reference point is determined as the point where the distance is the widest among the mutual intervals between the divided positions, and the distance is equally divided. The obtained position is not used for splitting, but is set as the retracted position of the tool rest that can be retracted to that position, and the above operation is repeated until the sum of the divided position and the retracted position matches the number of tool rests. Since the number of target positions corresponding to the number of turrets is determined as the distance from the reference point, it is possible to ensure that the turrets are always dispersed within the turret moving area. Therefore, it is possible to shorten the total operating time when the width of the machine is changed repeatedly.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the outline of the present invention, FIG. 2 is a side view of an embodiment of a tool post to which the invention is applied, and FIG.
FIG. 4 is an explanatory diagram showing the outline of the control device, FIG. 4 is an explanatory diagram showing the procedure for moving the tool rest, and FIG. 5 is a side view of another embodiment regarding the tool rest. 1...Turret post, 1a...Cuttle, 4...Control device.

Claims (1)

[Scope of Claims] 1. A plurality of tool rests each equipped with a blade are arranged in the width direction of the object to be cut, and the object to be cut is cut, and when changing the dividing width, the tool rest is engaged with one screw shaft. Accordingly, in a slitter device having a corresponding tool post moving mechanism for moving a corresponding tool post, each of which is equipped with a moving distance measuring signal transmitting means, the control device that receives the moving distance measuring signal transmitting means when changing the cutting width, sets the following: Based on the setting value for the division width or division position set on the operation unit and the information stored in the storage unit, the calculation processing unit calculates the division position as a distance from the reference point, and stores it in the storage unit, When the number of turrets is larger than the number of divided positions mentioned above, the calculation processing unit takes the position where the distance is the widest among the mutual intervals between the divided positions and divides the interval equally as the distance from the reference point. The position obtained by the above calculation is not used for division, and is stored in the storage unit as the retraction position of the tool rest that can be retracted to that position, and the sum of the division position and the retraction position is the number of tool rests. By repeating the above calculation and memorization until they match, the number of target positions corresponding to the number of turrets is determined as the distance from the reference point, and based on the above calculation results, the distance from the reference point at each target position is calculated. A method for changing the width of a slitter device, characterized in that a required movement command signal is output from an output section in order to perform positioning by matching the order of sizes and the order of arrangement of the turrets.