JPH0116639B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an apparatus for dividing objects to be cut, such as wide strip sheets such as paper, plastic film, and metal plates, and wide paper tubes for winding strip sheets. The present invention relates to a method for positioning a tool post equipped with a cutter.
Here, the term "knife" is a concept that includes laser beams and the like that have the cutting ability of a knife in a narrow sense.

<Prior art> When performing positioning when changing split specifications in a device in which multiple tool rests equipped with cutters can be moved left and right by a single common drive screw shaft via a mechanism for engaging and disengaging them. To do this, the engagement/disengagement mechanism of the tool post on one side (for example, the left side) of the target position is engaged with the screw shaft that rotates forward at high speed, causing it to move to the right at high speed, and when it approaches the target position, the rotation is switched to low speed and the target position is reached. When the target position is reached, disengage the locking/disengaging mechanism and stop it. When all the turrets that should move to the right have finished moving, then rotate the locking/disengaging mechanism of the turret on the other side (right side) of the target position at high speed in reverse. Engage with the screw shaft and move it to the left at high speed,
When approaching the target position, the rotation was switched to low speed, and when the target position was reached, the locking/disengaging mechanism was disengaged and stopped.

In other words, the turrets that move leftward and rightward are moved at high speed and at low speed, respectively.

<Problem to be solved by the invention> However, in the above case, if the tool post overruns the target position and stops due to the gap between the screw shaft and the engagement surface of the locking/disengaging mechanism, It is not possible to position at the target position, and there is a problem with accuracy. Also, after repeating the forward rotation of the screw shaft at high and low speeds in relation to the tool rest facing in one direction,
This time, the screw shaft is repeatedly rotated in the opposite direction at high and low speeds in relation to the turret facing the other direction, so changing the rotation etc. is troublesome, and each turret must be moved individually at low speed. Positioning takes time, and this is particularly noticeable when there are a large number of tool rests to be moved and there are variations in the required movement distances for each.

<Means for Solving the Problems> Therefore, the tool post positioning device of the present invention has a reference position set at an arbitrary position within a work area, and a plurality of blades each having a blade capable of dividing an object to be cut. In a device in which the turret can be moved left and right by a single common drive screw shaft via a mechanism for engaging and disengaging the turret, when moving the turret to the target position due to a change in split specifications, the screw shaft must be Drives rotation at high speed in the direction of
Engage the engagement/disengagement mechanism of the tool post on one side of the target position to move the tool post to the target position at high speed, and when each tool post reaches the target position, disengage the engagement/disengagement mechanism for each turret and stop. Then, the screw shaft is rotated at high speed in the opposite direction to the previous direction, and the engagement/disengagement mechanism of the tool post on the other side of the target position, including the tool post related to the above movement, is engaged to move the tool post. Move to the target position at high speed, and when each tool rest reaches the target position, disengage the locking/disengaging mechanism for each to stop it, then drive the screw shaft to rotate at low speed in the same direction as the initial rotation direction,
Including the tool rest related to the above movement, engage the engagement/disengagement mechanism of the tool rest on one side of the target position, move the relevant tool rest to the target position at low speed, and when each tool rest reaches the target position. It is characterized by comprising a control device that disengages and stops the engagement and disengagement mechanisms and positions each one individually.

<Example> Fig. 1 is an explanatory diagram showing an outline of the positioning device of the present invention and a method for returning each tool post to the reference position. An example of a turret applied to a slitter device is shown below. 1 turret, 1 knife
a, a common drive screw shaft 2, a female screw or nut screwed onto the screw shaft 2 as 3, this engagement/disengagement mechanism as 3a, and a detector at each reference position as 4. S is a belt-shaped sheet that is the object to be cut. 2a is a screw shaft drive device, 2b is a rotational pulse detector that emits a pulse signal as the screw shaft 2 rotates, 5 is a control device, in this case, an arithmetic processing section 5a, a division width or division position setting operation section 5b, It consists of a storage section 5c, a display section 5d, and an input/output section 5e. By appropriately operating the drive device 2a of the screw shaft 2 and the engagement/disengagement mechanism 3a of the tool rest 1, each tool rest 1 moves left and right.
In addition, although the engaging/disengaging mechanism 3a is actually provided in each tool rest 1, it is shown here on the outside for convenience. Further, since the movement of the tool post from side to side by means of a screw shaft, a female screw, etc., and a mechanism for engaging and disengaging them belongs to the known art, detailed explanation will be omitted here.

The dotted line in the figure indicates the direction of electrical signal input/output, which is from the control device 5 to the screw shaft drive device 2.
an output signal to a, which instructs the screw shaft drive device 2a to rotate the screw shaft 2 in forward and reverse directions, or to stop it;
The control device 5 connects and disengages the mechanism 3 of each tool rest 1.
The engagement/disengagement operation is performed by the output signal to the engagement/disengagement mechanism 3a.
This is the signal that enters the control device 5 from the detector 4 located at the reference position of each tool post 1, and the signal that detects the return of the tool post to the reference position is the signal that is controlled from the rotational pulse generator 2b. Based on the rotational speed measurement signal of the screw shaft 2 that enters the device, the moving distance of the tool post is detected based on the rotational speed. Further, the signal output from the control device 5 instructs each cutter 1a to cut or rest, and the cutter 1a that receives the rest command assumes the posture shown by the dotted line in FIG. . In addition, the screw shaft drive device 2a
If it is made into a so-called pulse motor, the rotary pulse generator 2b will actually be unnecessary, and the signal input to the control device 5 will be sent from the screw shaft drive device 2a.

The position where the detector 4 is located is the reference position of each tool post 1, and the detection end 1 of the tool post 1 has returned from the operating position.
When b is detected by the detector 4, the signal enters the arithmetic processing section 5a of the control device 5, from which a command signal is output to the engagement/disengagement mechanism 3a of the tool post 1.
Release the engagement and stop the movement of the tool post 1. Of course, the screw shaft 2 continues to rotate until all the tool rests 1 return to their reference positions.

FIG. 3 is an explanatory diagram of an embodiment of positioning to a target position to which the present invention is applied, and FIG. 4 shows an example of a tool rest to which the embodiment of FIG. 3 is applied.

The embodiment shown in FIG. 3 is different from the embodiment shown in FIG.
In this case, a rack 7 is provided on the slide rail 6 along the moving direction of the tool post, and the rack 7 is engaged with the pinion 8 provided on the pulse generator 2b. This is the point that I tried to match. In response to the rotation of the pinion 8, the pulse generator 2b emits a specific pulse signal per rotation, and this signal is input to the control device 5 as a turret movement signal. If the backlash between the rack 7 and the pinion 8 poses a problem in terms of accuracy, the shaft of the pinion 8 may be supported so as to be elastically pressed against the rack 7. If the pulse detector 2b is provided in each tool post 1 in this way, there may be some backlash between the screw shaft 2 and the nut 3, or the tool post 1 may be damaged due to the influence of inertia, etc. Even if you stop a little beyond the position,
The amount of movement (position) of each turret can be detected accurately.

Second, this embodiment is different from the embodiment shown in FIG. 1 in that a detector 4 for detecting the reference position is provided on the tool rest, and a detection end 1b of the detected object is provided on the sliding rail 6. different. The control device 5 is not shown since it is common to the embodiment of FIG.

In addition, when the pulse detector 2b is provided in each tool rest 1, the reference position detector 4 and the detection end 1b are not provided, and each pulse detector 2b is also used as a reference position detector, and the rotational pulse detector 2b It is also possible to set a reference position for each reference pulse.

The cutter shown in FIG. 4 is different from the cutter shown in FIG. 2 in that the cutter is composed of a pair of upper and lower rotary blades 1a, 1a, and a pulse detector 2b is provided on each tool rest. still,
A reference position detector and a detection end are not shown.

Next, the procedure for positioning the tool post 1 in FIG. 5 will be explained based on the embodiment shown in FIG. 3.

First, to explain the outline, when the worker sets a new division specification and operates the start switch (5
b) In this example, the control device 5 rotates the screw shaft 2 in the normal direction (signal), selects the tool rest of the cutter located to the left of the respective reference position (5c), and engages the engagement/disengagement mechanism 3a. A command is issued (signal) to move the turret 1 to the right. The moving tool post 1 is
When each reference position detector 4 detects that the reference position has been reached, a signal is issued, and upon receiving the signal, the control device 5 issues a disengagement signal to the engagement/disengagement mechanism 3a to stop the turret. When all of the tool rests 1 that were on the left side of the reference position have returned to the reference positions, the tool rests 1 that were on the right side are returned to the reference positions using the same procedure. The rotation of the screw shaft 2 by the screw shaft drive device 2a may be switched automatically by the control device 5 or by an operator.

When all the tool rests have returned to their reference positions, the screw shaft drive device 2a receives the signal and drives the screw shafts in forward rotation at high speed, and the control device 5 moves the tool rest to the right, that is, to the left of the target position. A certain tool post is selected (5a), and an engagement command signal is issued to the engagement/disengagement mechanism 3a of the tool post to cause it to move at high speed. The turret moves while emitting a turret movement signal, so when it reaches its target position, it issues a separate detachment command signal and sequentially stops the turret. Next, the screw shaft drive device 2
A signal is sent to a, and this time the screw shaft is driven in the reverse direction at high speed, and the cutter tool on the right side of the target position, including the tool rest, which had previously moved to the right at high speed and stopped slightly beyond the target position. A table is selected by the control device 5 (5a), and an engagement command signal is issued to the engagement/disengagement mechanism 3a of the tool post to cause it to engage and move leftward at high speed. When the turret moves while issuing a turret movement signal and reaches the target position, a detachment command signal is issued to each turret to stop it sequentially. After the above-mentioned two high-speed movements are completed, the screw shaft is driven forward at low speed based on the signal, and the turret, which had stopped slightly to the left of the target position due to the previous high-speed movement, is engaged and detached. Mechanism 3
An engagement command signal is issued to a to move the turret at low speed, and a disengagement signal is sequentially issued to the engagement/disengagement mechanism of the turret that has been confirmed to have reached the target position by the turret movement signal to stop it. Complete positioning.

Now, FIG. 5 shows the blades A, B, C, D, which are installed in each of the six tool rests whose reference positions are lined up as pitches X with equal intervals within the movement area of the tool rest.
This is an example in which E and F are positioned based on the division widths W ₁ , W ₂ , and W ₃ . Since there are three division widths, there are four division positions: A', B', C', and D'. Furthermore, K ₁ ,
K ₂ , K ₃ , K ₄ , K ₅ , K ₆ are the reference positions of the blades A to F, respectively. Therefore, knife A or B will enter the new dividing position A', but in this case, since knife A is closer to dividing position A', knife A will move to the right by a distance a and move to position A. ’. Incidentally, the above selection operation may be performed by comparing the reference position of each tool post stored in the control device 5 with the new divided position, and automatically selecting the one with the smaller amount of movement. , the operator may select the item after checking the display on the display section 5d. and the dividing position
Similarly to A', the cutter C is moved to the left by a distance b to the split position B', the cutter D is moved to the right by a distance c to the split position C', and the cutter F is moved to the left by a distance d to the split position D'. A positioning procedure to be performed is determined and executed. As mentioned above, positioning is performed by first moving the right-moving cutters A and D at high speed, and then moving the cutlers A and D and cutters C and F, which have substantially exceeded the target position, to the left at high speed. Finally, all the blades that should be moved to the target position are moved to the target position at low speed. Of course, the opposite is also possible. However, depending on how the dividing positions are set, one blade may be closer to two or more dividing positions than other blades, but in this case, normal rotation of the screw shaft Alternatively, a condition may be given to the control device 5 so as to preferentially select one of the cases in which the movement is performed by reversing the movement.

Required tool rest (in this case, tools A, C, D, F)
the respective tool rests) are at their respective reference positions K ₁ , K ₃ ,
At the moment when it leaves K ₄ , K ₆ and starts moving, the reference position detector 4 issues a signal to start counting pulses from the pulse detector, and the control device starts counting the number of pulses for each turret ( signal). The reference position of each tool rest 1 and the moving distance for each pulse of the rotary pulse generator 2b are stored in advance in the storage unit 5c of the control device 5, and the target position after movement (required number of pulses) is also set. Since it is clear by arithmetic processing of the settings of the section 5b, the arithmetic processing section 5a compares the number of pulses required to move each required tool post with the number of pulses inputted sequentially as a signal, and determines whether the two match. A disengagement signal is issued to the tool post to release the engagement with the screw shaft 2. The specific procedure is as described above. Furthermore, when all of the moving tool rests reach their target positions, the output section 5e may issue a rotation stop signal.

Next, the procedure for positioning the tool rest 1 in FIG. 5 will be explained based on the embodiment shown in FIG. 1. Note that the outline is the same as the case based on FIG.

First, the new division width W ₁ is displayed in the setting operation section 5b.
When W ₂ and W ₃ are set, the processing unit 5a calculates the distances a, b, c, and d that each tool post should move from each reference position stored in the storage unit 5c by the number of rotation pulses of the screw 2. Calculated as Therefore, as in the case described above, when the tool post 1 leaves the reference position and moves to the right, and the pulse signal from the pulse generator 2b enters the control device 5, the tool D reaches the required distance c in this case. Therefore, the engagement mechanism 3a of the blade D is immediately
Screw shaft 2 is rotating at high speed when the withdrawal signal is output to
The female screw 3 that was engaged with is disengaged, and the tool rest D is stopped. Subsequently, in this case, the cutter A reaches a predetermined distance a and similarly receives a detachment command and stops.
Now move to the right toward the target position (normal rotation of screw shaft 2)
After completing the positioning work of the blades A and D by high-speed movement, the screw shaft drive device 2a receives a signal and starts reverse rotation at high speed to move the blades C and F, respectively, to the left toward the target position. Only distances b and d,
Also, cutters A and D are moved at high speed by the amount beyond the target position, and high-speed positioning is performed in the opposite direction, and finally cutters A, C, D, and F are moved to the right by the amount beyond the target position. to perform final positioning. In this case, there is no need to position the blades B and E, so if they do not interfere with the positioning work of other blades, leave them as they are; if they do, move them away. In this way, each tool rest 1
The cutlery A to F (excluding B and E) are at positions A', B', C', according to the new division widths W ₁ , W ₂ , W ₃ .
It will end up at D′. Thereafter, in this example, the control device 5 outputs a cutting posture command signal, and the blades A, C, D, and F take the cutting posture.
Note that the selection work of the tool post may be automatically performed by the control device 5 as described above, or may be performed by the operator. Alternatively, the operator may move the required tool rest to the target position after confirming that the tool rest has returned to the reference position.

Although the present invention has been described above with reference to simple embodiments, for example, the calculation method in the control device 5 can be varied in various ways according to the well-known techniques of engineers. or,
The present invention can be applied and changed as appropriate without limiting to the calculation method.

In addition, the present invention is not limited to a device that cuts an object with a blade as shown in Figs. 2 and 4, but also a shearing mechanism that cuts an object with a pair of rotating blades, in which only one or both of the blades cut the object. In addition to positioning the turret separately at the same time, it is also useful for cutting mechanisms that press round or rectangular knives against a straight receiving blade roll, and for positioning turrets equipped with nozzles for laser beams, ultrasonic waves, high-pressure water jets, etc. It can also be used for

Examples of the object to be cut include a traveling wide belt-like sheet, a wide paper tube for winding up a belt-like sheet, and a roll-shaped intermediate product obtained by winding a wide belt-like sheet.

<Effects of the Invention> The positioning device of the present invention first rotates the screw shaft in one direction at high speed (for example, forward rotation) and engages the engagement/disengagement mechanism of the tool rest located on one side (for example, the left side) of the target position. When each tool rest reaches its reference position, the locking and disengaging mechanism is disengaged to stop the tool rest, and then the screw shaft is rotated at high speed in the opposite direction, and when the tool rest reaches the reference position, Engage the engagement/disengagement mechanism of the tool rest on the right side of the position (including the tool rest that stopped beyond the target position due to inertia during the previous movement), and move to the target position in the same way as in the previous movement. Starting with the tool post that has reached the desired position, the tool post is disengaged and stopped in order, and finally the screw shaft is rotated forward at low speed to move the tool post on the left side of each target position to the right in the same manner as before to position it at the target position. That is, according to the present invention, the tool post passes the target position and stops due to the influence of inertia when moving to the right due to high-speed forward rotation of the screw shaft.
During the next high-speed reverse rotation, it is moved to the left, so the position of each tool rest at the end of the high-speed forward and reverse rotation of the screw shaft is either above the target position or slightly to the left of the target position due to the influence of inertia. become.
Then, the tool rest in this shifted position is moved to the right to the target position by low-speed forward rotation of the screw shaft. Therefore, each tool rest can be accurately placed at the target position without being affected by inertia or the like. In addition, regarding the rotation of the screw shaft, it is easy to perform high-speed leftward movement, high-speed rightward movement, and low-speed leftward movement regardless of the required travel distance for each turret. By repeating high-speed rotation and low-speed rotation for each of the turrets, the positioning can be completed in less time than when positioning is performed individually by low-speed movement for all the tool posts. In addition, the above-mentioned forward and reverse rotation,
Right row and left row are used for convenience of explanation, and
It goes without saying that this does not indicate absolute directionality, and that the present invention can also be applied to the case of moving the tool post to the reference position.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is a side view of one embodiment of the tool post, Fig. 3 is an explanatory diagram of another embodiment of the invention, and Fig. 4 is an explanatory diagram of the tool post. FIG. 5, a side view of another embodiment, is an explanatory view of the positioning operation of the present invention. 1...Turret post, 1a...Cuttle, 2...Screw shaft,
5...Control device.

Claims (1)

[Claims] 1. A reference position is set at an arbitrary position within a work area, and a plurality of tool rests each equipped with a blade capable of dividing an object to be cut are moved to this by a single common drive screw shaft. In a device that can be moved left and right through a locking/disengaging mechanism, when moving the turret to the target position due to a change in split specifications, the screw shaft is driven to rotate at high speed in one direction, and the screw shaft is rotated at high speed in one direction to move it to one side of the target position. Engaging the engagement/disengagement mechanism of a certain tool post to move the tool post to a target position at high speed,
When each tool rest reaches its target position, the locking/disengaging mechanism is disengaged from each one to stop it, and then the screw shaft is rotated at high speed in the opposite direction to the previous direction, and the tool rest including the tool rest involved in the above movement is moved to the target position. engaging the engagement and disengagement mechanism of the tool rest on the other side to move the tool rest to the target position at high speed, and when each tool rest reaches the target position, disengage the engagement and disengagement mechanism of each to stop the tool rest; Next, the screw shaft is driven to rotate at a low speed in the same direction as the initial rotation direction, and the engagement mechanism of the tool post, which includes the tool post related to the above movement, and which is on one side of the target position is engaged to move the tool post. A tool post positioning device characterized by comprising a control device that moves to a target position at low speed, and when each tool post reaches the target position, disengages and stops a locking/disengaging mechanism to position each tool post individually.