JPH0630871B2 - Positioning method of blade in shear dividing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an object to be cut such as paper, plastic film, adhesive tape, by engaging a pair of upper and lower rotary blades.
The present invention relates to a blade positioning method in a shearing / dividing device that shear-divides a wide strip-shaped sheet such as a metal plate into a plurality of strips.

(Prior art) In this type of shear dividing device, commonly known as a shear cutting slitter, the current position of each upper and lower blade base is grasped by a computer, and at the time of positioning due to the change of the division specifications, the target position is set for each blade base. And a command is issued by the computer to compare and calculate the present position of each blade and the target position and to instruct the moving mechanism of each blade, for example, the one disclosed in Japanese Patent Laid-Open No. 49-132685. There is. The moving mechanism of each blade base is generally composed of a rotation driving screw shaft of each of the upper and lower blade bases and an engagement / disengagement mechanism of each blade base. In this case, the upper and lower blades move together, but it is the lower blade that actually receives the instruction of the target position from the computer.

Then, the positioning method is a step of moving the lower blade toward the target position and moving the pair of upper blades following this, the stop position of the lower blade that has reached the target position and stopped, and the upper blade side. The step of stopping the upper blade by detecting it by the proximity switch or the touch switch provided in the step, the step of bringing the stopped upper blade toward the lower blade, the upper blade stand without moving the upper blade in the approaching state And a step of pressing and engaging the side surface of the lower blade with fluid pressure or the force of a spring. Therefore, each upper blade does not have its own target position set, and the movement of the blade base ends at the detection stage in the touch switch or the like.

(Problems to be solved by the invention) However, in the above-mentioned conventional technique, the upper blade merely moves following the lower blade, and the movement or stop thereof is detected by a touch switch or the like. Determined by Therefore, the positioning operation must be performed with the object to be cut between the upper and lower blades removed. That is, for example, there is a problem that the positioning work cannot be performed with the belt-shaped sheet inserted, and the work efficiency cannot be improved. Further, the position and movement amount of the upper blade cannot be accurately grasped, and therefore it is difficult to control the position of the upper blade, and particularly to set a delicate clearance between the upper and lower blades according to the object to be cut.

The present invention has been made to solve the above problems, and it is possible to position the upper and lower blades in the inserted state of the object to be cut, and to set the clearance that matches the type and thickness of the object to be cut. Provided is a method of positioning a blade in a shear-dividing device that can be used.

(Means for Solving the Problems) Therefore, the present invention provides an upper blade base having an upper blade and a lower blade base having a lower blade, and the upper blade base provided in the width direction of the object to be cut, A guide base that movably supports the lower blade base, a drive screw shaft provided along the guide base, and a drive screw shaft that can be engaged and disengaged with each of the upper blade base and the lower blade base. An engagement / disengagement mechanism provided, and a drive mechanism that moves the upper blade of the upper blade base in a direction orthogonal to the moving direction of the upper blade base, and drives the upper blade base closer to and away from a pair of lower blades, In a shear dividing device that engages the lower blade and shear divides the object to be cut into a plurality of lines,
The lower blade is positioned by the engagement / disengagement mechanism of the drive screw shaft and the lower blade base with respect to the set target position, and the upper blade paired with the lower blade is separated from the lower blade by the drive mechanism. By the engagement / disengagement mechanism of the drive screw shaft and the upper blade base, the upper blade is moved and stopped at a position maintaining a required distance from the set target position of the upper blade, and the stopped upper blade is paired by the drive mechanism. It is characterized in that the above-mentioned approaching upper blade is positioned at a target position by the engagement / disengagement mechanism of the drive screw shaft and the upper blade.

(Operation) In the shearing / dividing device of the positioning method according to the present invention, the upper and lower pedestals, each of which has a blade, engage and disengage the engaging and disengaging mechanism of the upper blade and the lower blade with the common drive screw shaft to thereby displace the guide base. It is possible to move on the table in the width direction of the object to be cut, and to drive each upper blade table to move the upper blade in the direction orthogonal to the moving direction and to move it toward and away from the pair of lower blades. A mechanism is provided.

Then, at the time of positioning, the target position is set to the required upper and lower blades, and based on the above setting, the lower blade is positioned at the target position by the combination of the screw shaft and the engagement / disengagement mechanism, and the upper blade is set with respect to the set target position. The screw shaft and the engagement / disengagement mechanism to move and stop to a predetermined position where a required distance is maintained, and when the screw shaft reaches the predetermined position, the drive mechanism causes the upper blade to approach the lower blade, and then the screw shaft again. The upper blade base is moved by a combination of the engagement and disengagement mechanism to position the upper blade at a target position.

In the case of positioning based on the following division specifications, the upper blade is returned to the predetermined position from the target position together with the upper blade base, and is separated from the lower blade by the drive mechanism, and then the above procedure is performed.

(Embodiment) FIG. 1 is an explanatory view of an embodiment of the present invention, and FIG. 2 shows a state in which a strip-shaped sheet S which is an object to be cut is shear-divided by a pair of upper and lower blades 1 and 1a, and FIG. The state where the upper blade 1 moves to a position closer to the lower blade 1a and is finely adjusted with respect to the target position is shown.

The slide bases that are the guide bases for the upper and lower blades are 2, 2a,
3 for each upper blade, 3a for lower blade, 4, 4 for each drive screw shaft
a, a rotation pulse generator 8 for generating a predetermined number of pulses per rotation, provided with female screws 5 and 5a for engaging and disengaging nuts with the screw shafts 4 and 4a, respectively, and on the respective blade bases 3 and 3a. 8a, 6 pinions provided on the rotary shafts of the rotary pulse generators 8 and 8a are laid along the sliding bases 2 and 2a, and a rack that meshes with the pinion 6 is 7 and the upper blade 1 is the lower blade 1a. In this case, the fluid pressure cylinder is 9, and the control device is 10. In this case, the control device 10 calculates the position of the blade to be moved for positioning and the moving procedure thereof, converts the distance to the target position of the required blade into the number of pulses, and this value is stored in the storage unit. , The current position of the upper and lower blades 1, 1a compared with the current position (the number of pulses) of 1a, output so as to eliminate the difference and move the upper and lower required blade bases 3, 3a toward the target position. But,
For example, the storage unit 10b is stored as the number of adjustable pulses from the reference position zero set at any position in the moving region of the upper and lower blades, and other necessary elements for positioning are stored, the division width and the division. It is composed of a setting operation unit 10c for setting a position and for operating the device to start and stop, an input / output unit 10d, and a display unit 10e. 11 and 11a are drive devices for the screw shafts 4 and 4a, 12 and 12a are communication drive shafts for the upper blade 1 and the lower blade 1a, respectively.
Reference numeral 3 is a drive device that drives the communication drive shafts 12 and 12a. Therefore, the upper and lower blades 1, 1a are rotationally driven by the drive device 13 via the communication drive shafts 12, 12a.

The signal output from the input / output unit 10d of the control device 10 is a signal for instructing the engagement / disengagement mechanism 5 of the upper blade base 3 to engage / disengage with the screw shaft 4, and ′ similarly denotes the engagement / disengagement mechanism of the lower blade base 3a. A signal output to 5a, similarly a signal output from the input / output unit 10d of the control device 10 is a signal for instructing the drive device 11 of the screw shaft 4 to rotate forward / reversely or to stop rotation, and ′ similarly to the lower blade base. Is a signal output to the drive device 11a for the screw shaft 4a for use. The signal input to the input / output unit 10d of the control device 10 is a transmission signal from the rotation pulse generator 8 of each upper blade table 3, that is, a movement amount measurement signal of the upper blade 1, and ‘ This is a signal transmitted from the rotary pulse generator of the blade stand 3a. The signal output from the input / output unit 10d of the control device 10 is an operation command signal to the fluid pressure cylinder 9 that causes the upper blade 1 to move toward and away from the lower blade 1a.

Then, when a new division width or division position is set by the setting operation unit 10c, the arithmetic processing unit 10a stores the positions of the upper and lower blade bases 3 and 3a, the moving procedure, and the moving distance (the number of pulses) in the data of the storage unit 10b. Calculate based on

Hereinafter, in FIG. 1, a case where the upper and lower blades 1 and 1a are one set and are moved to the right will be described. After the upper blade 1 moves to the first target position, it moves to the second target position which is the final target position, and the first target position is a few pulses less than the predetermined number of pulses up to the second target position. It is set to (a large time point when the number of pulses is counted toward minus) and is stored in the storage unit 10b.

First, a signal is output from the input / output unit 10d to the fluid pressure cylinder 9 to retract the upper blade 1 in a direction orthogonal to the moving direction of the upper blade base 3 and output a signal, 'to the engaging / disengaging mechanism 5, 5a. A signal for moving the upper and lower blades 3, 3a to the driving screw shafts 4, 4a and for moving the upper and lower blades 1, 1a to the right,
Is output to the drive devices 11 and 11a to be operated, the drive screw shafts 4 and 4a are normally rotated, and the upper and lower blade bases 3 and 3a are moved toward a target position.

When the drive screw shafts 4, 4a rotate in this way and each blade base starts to move, the number of pulses is determined based on the signals' supplied from the respective rotation pulse generators 8, 8a to the input / output unit 10c. The arithmetic processing unit 10a monitors whether or not the number has been reached, and when the number of pulses reaches a predetermined number, individually outputs signals and ′ to the engagement / disengagement mechanisms 5 and 5a to drive the upper and lower blade bases 3 and 3a to drive the screw shaft 4. , 4a are separated and stopped, and a signal 'is output to the driving device 11a to stop. In this state, the upper and lower blades 3,
3a, that is, the upper and lower blades 1 and 1a are positioned with a predetermined interval maintained, but since the drive device 11 is operating, the drive screw shaft 4 on the upper blade base side is rotating.

Then, after outputting a signal to the fluid pressure cylinder 9 to bring the upper blade 1 closer to the lower blade 1a forming a pair, a signal is output to make the engagement / disengagement mechanism 5 of the upper blade base 3 move to the drive screw shaft 4. On the other hand, they are brought into the engaged state, moved by the number of remaining pulses, moved to the target position, and positioned at the final position.

The above description is an example in which the upper and lower blades 1 and 1a are moved to the right, but when the upper and lower blades 1 and 1a are moved to the left, the drive mechanisms 11 and 11 are used.
A signal for reversing the driving screw shafts 4, 4a, 'is output to a and positioning is performed in the same procedure. It is preferable that the pinion of the rotary shaft of the rotary pulse generator is lightly pressed against the rack by a spring or the like to eliminate the backlash (play interval) between the rack and the pinion. The selection of the blade to be positioned, the movement of the upper blade 1 to a predetermined position, the approaching operation of each upper blade 1 to the lower blade, and the final positioning operation to the target position are performed automatically as a series of series controls. Alternatively, the operator may check each time based on the display on the display unit 10e and then perform the next operation by a switch operation. The operator may select the blade to be positioned. Further, at the time of positioning, whether to set the target position of the upper blade to a position where it is pressed against the lower blade, or to set it at a position with a gap may change depending on the material of the workpiece, etc. In such a case, the operator may consider it at the time of setting in advance, or the required interval for each material may be stored in the storage unit and this value may be considered at the stage of the arithmetic processing.

By the way, in this embodiment, the upper and lower blades 1 and 1a are moved while being separated by the fluid pressure cylinder 9. Therefore, it is possible to perform the positioning in the inserted state of the object to be cut, which has been impossible in the past, and it is possible to reduce the labor of the operator and improve the working efficiency. In addition, the upper blade 1 which has merely tracked the lower blade 1a in the past, has a target position set, and is independently moved by the entanglement of the drive screw shaft 4 and the engagement / disengagement mechanism 5 to make the final position. Positioning is in progress. Therefore, it is not necessary to provide a pressure contact mechanism for the lower blade with the upper blade, and the structure of the upper blade base can be simplified. Furthermore, depending on the material and thickness of the object to be cut,
A slight clearance (clearance) instead of pressure contact between the upper and lower blades
Even when it is required to engage with
Since it can be dealt with easily and without lowering the accuracy, more appropriate shear division can be performed.

FIG. 4 is an explanatory diagram of another embodiment of the present invention. This embodiment differs from the above-mentioned embodiments in the following points.

First, the upper blade 1 of this embodiment does not have a positive rotary drive mechanism. Therefore, the upper blade 1 stops rotating by being driven by contacting the lower blade 1a.

Secondly, rotation pulse generators 14 and 14a for the upper blade and the lower blade, respectively, are provided at the ends of the screw shafts 4 and 4a, and the signals transmitted from the rotation pulse generators 14 and 14a, ' Is input to the input / output unit 10d as a rotation speed measurement signal of the screw shafts 4 and 4a. Then, the above-mentioned signal, 'plays the role of the signal,' in the above-mentioned embodiment. That is, the moving distance, the current position, and the target position of the blade will be clarified by the number of pulses generated by the rotation of the screw shaft. If the drive units 11 and 11a are pulse motors, the signal, 'will be transmitted from the drive units 11 and 11a.

Thirdly, in this embodiment, the reference position for each cutting tool is set within the working area, and the detector 1 is provided for each of the reference positions.
6 and 16a, and each blade has detection ends 15 and 15a. Then, a detection signal for detecting that each blade has reached the reference position is input to the input / output unit 10d as a signal, '.
The relationship between the detector and the detection end may be reversed.

Although this embodiment differs from the above-mentioned embodiments in the above points, there is no change in the method of positioning the blade (engagement with the screw shaft, approach of the upper blade, etc.).

Next, the procedure for positioning the lower blade and the upper blade will be described with reference to the embodiment shown in FIG. Since the upper blade and the lower blade are independently positioned, only one side is shown in the drawing.
This embodiment uses three blades among the five blades A, B, C, D, and E located at the positions indicated by the broken lines, and has division widths Δl ₀ , W ₁ , W ₂ , Δl _m. This is an example in which the positioning is performed at.
The width of the division in this case is W ₁ > W ₂ > Δl _m > Δl ₀
Suppose Then, in this embodiment, the target positions of the blades (in this case, two blades) that are not actually used are set in order from, for example, a portion having a large dividing width during the dividing position interval determined based on the dividing width.

That is, in this case, the target position is set between the division widths W ₁ and W ₂ , and if this position is obtained at the center of the division width, the division widths are sequentially arranged from the left. Becomes When the division width is replaced with the target position of each cutting tool, the target position of the cutting tool A is the position of A ′ at a distance of l ₁ from the reference point 17 and the target position of the cutting tool B is from the reference point 17 to l ^′. ₁ ,
That is The position of B'at the distance of and the target position of the blade C are the reference point 17
To l ₂ , that is The position of C'at the distance of
To l ^′ ₂ , that is, The position of D'at the distance of
To l ₃ , that is It means the position of E'at the distance of. As is clear from the above description, this embodiment sets the division width and the target position for all knives regardless of the number of actually used knives. , B,
The cutters arranged in the order of C, D, and E are attached to the dividing position A ′ at the dividing position A ′ to secure a dividing width of Δl ₀ , and similarly, a procedure of attaching other cutting tools to the dividing positions is executed. HOWEVER actually required division width _{Δl 0, W 1, W 2} , because it is .DELTA.l _m, cutlery B, D never match blade and engage a pair. When the blades A to E are the upper blades 1, the blades are stopped before reaching the target positions A'to E ', and after being approached to the lower blades, they are positioned at the target positions.

Further, according to the above-mentioned embodiment, it is possible to prevent the position of the blade from being swayed, and it is possible to secure the state in which the blade is always dispersed in the blade moving region (the region between reference numerals 18 and 19). Therefore, it becomes possible to shorten the total operation time when the width change is repeated.

Although the number of blades and the number of divisions have been described as an example, it goes without saying that other conditions can be dealt with by the same procedure. Although the target position of the blade not used in the embodiment is set at the center of the division width, the target position may be set at a position other than the center. Further, a plurality of target positions of the blades which are not used may be set in the dividing width, which is particularly effective when the dividing width is very wide and the number of blades not used increases.

There is also a method of indexing an operation procedure that can be executed for the next division specification from the current position of the cutting tool and selecting an appropriate procedure among them. The selection method will be described. First, based on the new division width that has been set, this is calculated at the division position, and the interval between the division positions is also calculated. Next, the blades are assigned to which divided positions they are to be moved. Next, the position of the blade that moves to the division position and the position for retracting the blade that is not used for the division are calculated. Next, it is calculated whether or not the above saving is possible. That is, when the tool rest not used for cutting is retracted between the divided positions, it is determined whether the tool rest falls within the space. If retreat is impossible, it is impossible to perform positioning with that pattern. If the evacuation is possible, the time required for the next movement is calculated. As its calculation element,
In addition to the moving time of the blade, in some cases, the time required for the engagement / disengagement operation with the screw shaft, and the time required for the screw shaft to rotate from the forward rotation to the reverse rotation are also factors. Then, at this stage, the calculated time is stored as the moving time in the blade allocation pattern. Next, it is determined whether or not all or a predetermined number of blade allocation patterns have been calculated.
If it is not completed, the moving time and the like are calculated based on another pattern. If all or a predetermined number of blade allocation patterns have been completed, for example, the pattern having the shortest movement time among the stored patterns is adopted and output.

In selecting the pattern, the pattern having the shortest movement time among the feasible blade allocation patterns may be automatically selected by the control device. Alternatively, the operator may select any of the patterns to be displayed.

Next, another embodiment of the procedure for positioning the cutting tool will be described with reference to FIG. This embodiment is a procedure performed by using the shear dividing device shown in FIG. As in the case of FIG. 5, only one side is shown in the drawing.

First, an outline will be given. When an operator sets a new split specification and operates a start switch (10c), the arithmetic processing unit 10a causes the current position of each blade stored in the storage unit 10b and each blade from each reference position. Calculates the distances a, b, c, d that should be moved as the number of rotation pulses of the screw shaft 4 (4a), and input / output unit 10d
In this example, the screw shafts 4 and 4a are rotated in the normal direction (signal, ′), and the tool post located on the left side of each reference position is selected (10b), and the engaging / disengaging mechanisms 5 and 5a are engaged. A combined command is issued (signal, ') and the blades 1 and 1a are moved to the right. The moving blades 1 and 1a have their respective reference position detectors 16,
When it is detected by 16a that the reference position is reached, a signal, 'is issued, and the control device 10 receiving the signal issues a disconnection signal,' to the engagement / disengagement mechanisms 5, 5a to stop the tool rest. When all the blades 1 and 1a attached to the left side of the respective reference positions have returned to the reference position, the blades 1 and 1a attached to the right side are returned to the reference position by the same procedure. The control device 10 may automatically switch the rotation of the screw shafts 4 and 4a by the screw shaft driving devices 11 and 11a, or may be performed by an operator.

When all the knives have returned to the reference position, in this example, the screw shaft driving devices 11 and 11a receive the signal, ′ to start the normal rotation driving, and the control device 10 selects the turret moving rightward.
(10b) Issue an engagement command signal, 'to the engagement / disengagement mechanism 5, 5a of the tool rest of the tool to move it. The subsequent screw axis reverse operation, stopping of the upper blade at a predetermined position, approaching the lower blade, positioning to the target position, and the like have been described above, and will be omitted here. Further, the above description assumes that the upper blade has returned to the predetermined position after the shear division.

By the way, FIG. 6 shows the tools F, G, H, I, J, and K provided on each of the six tool stands whose reference positions are arranged as the pitches X at equal intervals in the moving area of the tool rest. , Is an example of positioning based on the division widths W ₁ , W ₂ , W ₃ . Since there are three division widths, there are four division positions, F ′, G ′,
H ', I'. In addition, L ₁ , L ₂ , L ₃ , L ₄ , L ₅ , L ₆
Is the reference position of each of the blades F ... K. Therefore, the cutting tool F or G comes to the dividing position F ', but in this case, since the cutting tool F is closer to the dividing position F', the cutting tool F moves rightward by the distance a to the position F '. Tsuku. Incidentally, in the selection work, the reference position of each tool post stored in the control device 10 and a new division position may be compared and calculated, and the one having a smaller movement amount may be automatically selected. The operator may select the display on the display unit 10e after checking the display.
Then, similarly to the division position F ', the blade H
To the left by a distance b, and the cutting tool I is moved to the dividing position H ′ by the distance c.
A positioning procedure is performed in which the blade K is moved rightward and the blade K is moved leftward by the distance d at the division position I ′. As described above, the positioning is performed by moving the right-handed blades F and I first, and then by moving the blades H and K leftward. Of course, the reverse is also possible. However, depending on how to set the division position, 1
There may occur a case where one blade is closer to two or more divided positions than other blades. In this case, one of the cases where the screw shaft moves by forward rotation or reverse rotation is preferentially selected. Such conditions may be given to the control device 10.

The reference position detector 16 (16a) produces a pulse at the moment when the required blade (in this case, the blades F, H, I, K) and the respective reference positions L ₁ , L ₃ , L ₄ , L ₆ are started to move. The pulse counting start signal (') is issued from the detector, and the controller starts counting the number of pulses (signal,'). Each knife 1 (1
Reference position of a), 1 in rotary pulse generator 14 (14a)
The moving distance for each pulse is stored in advance in the storage unit 10b of the control device 10, and the target position after moving (the required number of pulses)
Since it is also clear that the setting of the setting unit 10c is arithmetically processed, the arithmetic processing unit 10a compares the number of pulses required for movement for each required cutting tool with the number of pulses input as the signal (′), and In the case of the blade 1a, a disengagement signal 'is issued to the tool rests in which the two coincide, and the engagement with the screw shaft 4a is released. In the case of the upper blade 1, when the difference between the two reaches a preset predetermined value, a disengagement signal is issued to disengage and stop the engagement with the screw shaft 4 (predetermined position), and then the lower blade is approached. After that (signal), the engagement signal is again issued to engage the screw shaft 4. When the numbers of pulses match, a departure signal is issued and positioning is performed. Further, the input / output unit 10d may issue a rotation stop signal (') when all the knives on one side while moving reach the target position.

Although the above-described positioning procedure is premised on that all the blades are returned to their respective reference positions and then moved to the target position, other methods may be used, and one example will be described below. First, the screw shaft 4 (4a) is rotated in the forward direction so that the blade on the left side of its own reference position is moved to the right, and even when the blade reaches the reference position, the rotation of the screw shaft 4 (4a) is continued. , The blade having the target position on the right side of its own reference position within the blade is positioned at the target position in the engaged state. Next, rotate the screw shaft in the reverse direction, and among the blades that are on the right side of their own reference position, and among the blades that have moved to the right and stopped at the reference position earlier, the blade that has the target position on the left side of its own reference position. Instruct the engaging / disengaging mechanism of the tool post to engage and let it go to the left. In this case, among the above-mentioned former, the blade having the target position on the left side of its own reference position is moved to the target position as it is, but the blade on the right side including the reference position of its own and the resting tool are the reference positions. To stop. Further, the latter is positioned as it is to the target position. Finally, because the target position is on the right side of its own reference position in the former one, the blade shaft stopped at the reference position is rotated forward and the engagement / disengagement mechanism of the blade base is engaged. And position it rightward. According to this method, the forward and reverse rotation of the screw shaft is performed three times in total, and the time required can be shortened. In this case, the pulse counting may be reset at the reference position and then the counting may be newly started. If the detection signal of the reference position detector has hysteresis, the pulse count may be taken into consideration accordingly.

Also, if the working area of all the blades is limited to only the right or left side including the reference position of itself, it may take a lot of time as compared with the case where it can be moved in any of the left and right directions, The control and positioning operations can be simplified.
That is, according to this method, the returning operation of each blade to the reference position and the positioning operation to the target position are sufficient once.

Then, by setting the reference position for each tool in the movement area of the tool rest in this way, it is possible to confirm that each tool has passed its respective reference position by a photoelectric switch, a proximity switch, a touch switch, etc. By using the count value of the counter at the time of passing as a reference value, the more accurate current of each cutting tool can be obtained by comparing the number of pulses adjusted to this with the previously known distance from the reference point to the reference position. I know the position. Therefore, even if an error occurs, each blade can be returned to the reference position once, and accurate counting can be performed again. The return to the reference position may be performed each time positioning is performed, or may be performed in an emergency or at the start of work.

The present invention has been described above based on the simple example.
It goes without saying that the embodiment is appropriately changed and applied by a known technique of a designer or the like.

For example, there are various other methods for selecting the program for changing the width and the moving procedure, and the invention is not limited to that of the embodiment.

The number of pulses per revolution emitted from the rotary pulse generator can be increased as much as possible, the higher the number, the more complete the positioning, especially the final positioning of the upper blade. Of course, the number of pulses per rotation may be about 100 when the upper blade moves to a predetermined position, and the number of pulses per rotation may be increased only at the time of final positioning.

The strip-shaped sheet, which is an example of the object to be cut, may be made of various materials such as various winding devices and sheet processing devices regardless of its material.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the upper and lower blades are moved while being separated by the drive mechanism. Therefore, it is possible to perform the positioning in the inserted state of the object to be cut, which has been impossible in the past, and it is possible to reduce the labor of the operator and improve the working efficiency.
Also, for the upper blade, which conventionally only followed the lower blade, set the target position and move it to the target position independently by the entanglement between the drive screw shaft and the engagement / disengagement mechanism to perform final positioning. There is. Therefore, accurate position control can be performed for the upper blade as well, and it is not necessary to provide a mechanism for pressing the lower blade to the lower blade, and the structure of the upper blade base can be simplified. Further, depending on the material and thickness of the material to be cut, the upper blade and the lower blade can be easily and accurately deteriorated even if they are required to engage with each other with a slight clearance (clearance) instead of pressure contact. Therefore, more appropriate shear division can be performed.

[Brief description of drawings]

1 is an explanatory view of an embodiment of the present invention, FIG. 2 is a side view showing an example of upper and lower blades, FIG. 3 is an explanatory view showing a positioning operation of an upper blade, and FIG. 4 is another embodiment of the present invention. Example explanatory drawing, fifth
FIG. 6 and FIG. 6 are explanatory views of the positioning procedure of the blade, respectively. 1 ... Upper blade, 1a ... Lower blade, 3 ... Upper blade, 3a ... Lower blade, 4,4a
… Screw shafts, 5, 5a… Disengagement mechanism.

Claims (1)

[Claims] 1. An upper blade base having an upper blade and a lower blade base having a lower blade, and a guide which is provided in the width direction of an object to be cut and which movably supports the upper blade base and the lower blade base, respectively. A base, a drive screw shaft provided along the guide base, an engagement / disengagement mechanism provided on each of the upper blade base and the lower blade base, the engagement mechanism being detachable from the drive screw shaft, and the upper blade. Equipped with a drive mechanism that moves the upper blade of the table in a direction orthogonal to the moving direction of the upper blade table to move it toward and away from a pair of lower blades. In a shearing device that splits into a strip, the lower blade is positioned by the engagement / disengagement mechanism of the drive screw shaft and the lower blade base at the set target position, and the upper blade that pairs with the lower blade is driven. With the mechanism separating the lower blade from the lower blade, the engagement / disengagement mechanism between the drive screw shaft and the upper blade base allows the target position of the upper blade to be set. To a position where a required distance is maintained and stopped, and the stopped upper blade is brought closer to the lower blade that makes a pair by the drive mechanism. A method of positioning a blade in a shearing / dividing device, characterized by: