JP2511124B2 - Web feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for feeding a web (web material) at a stop position to an operating machine, and particularly, though not exclusively, a flat cutting press. The present invention also relates to a device to which supply to a machine is applicable.

[Prior art]

In flat-cutting presses, which ensure a circular break of a printed or unprinted continuous web of material, for example cardboard, this web is usually delivered continuously upstream from a reel. Since the flat cutting press needs to temporarily stop the progress of the web material during cutting, the material to be cut accumulates on the upstream side of the cutting press with continuous supply. In order to be able to store a certain length of web supplied upstream while the downstream part of this web is stopped in the flat cutting press, the excess length of web is made into a variable length loop form. Various storage devices have already been designed. This loop becomes long while the cutting press is stopped, and becomes short as soon as the press starts cutting again, and this work is repeated. The fact that the web is not held results in the abnormal positioning of the web as soon as the work speed increases.

[Problems to be Solved by the Invention]

To overcome this drawback, a device was devised which avoids the formation of free loops with the aid of a correction mechanism with a movable roller that absorbs this loop. For example, a typical one is the device disclosed in French patent FR-A-2408538, which causes the web to slide slightly on a roller fixed to a compensation mechanism for a given cutting format. Adopt a solution. However, this slippage would be significant if the cutout type changed. Furthermore, such devices require the machine to be stopped during adjustment, requiring a complex mechanism as well as both controls on each side. As a result, the device is relatively complex and inconvenient to handle.

[Means for solving the problem]

It is an object of the present invention to solve these problems by providing a device which facilitates its adaptive adjustment for different types, so that it is of particularly simple design and can be adjusted during operation.

Therefore, in the present invention, particularly, the web materials continuously fed on the upstream side of a machine such as a flat cutting press are brought into contact with each other and are rotationally driven at a constant peripheral speed, and have horizontal and lateral axes. A device for feeding a web material at a stop position to the operating machine through a pair of take-up rollers and a pair of take-up rollers, the take-up rollers being located downstream of the take-up rollers in the web traveling direction. A swing roller rotatably mounted on a support body that is swingable around the axis of the, and a means for causing the support body and the swing roller supported by the support body to swing; Means for supporting the tension of the web placed at the inlet, and periodic control of the swing of the support and swing roller,
Means for increasing or decreasing the length of the web path between the take-in roller and the machine to give a desired rule including a stop phase to the progress of the web material inside the machine. The take-up roller is rotationally driven through the transmission mechanism, and the peripheral speed of the rocking roller is equal to the speed of the web material that swirls around the outer peripheral portion of the rocking roller, so that the web material moves on the surface of the rocking roller. Provided is a web feeding device which is in contact with each other without slipping.

The device according to the invention has the advantage that there is no slippage between the web material to be cut and the rocking roller, whatever the type of work (format) achieved by the machine (eg the cutting type). This is because the rocking roller is rotationally driven by the take-in roller at the same peripheral speed as the take-in roller. This absence of slippage avoids print modifications in the case of a print web that contacts the oscillating roller on the print surface, and maintains the relative positioning of the web in the cutter with respect to other upstream equipment. Becomes Further, since the rocking controller for the rocking roller is provided only on one side of the device, it is considerably simple. Similarly, the supply device has means for finely adjusting the swing size of the swing roller during the operation of the device. These means of fine tuning during operation also allow the device to be servo controlled by some amount, such as web tension.

Another advantage provided by the device according to the invention is that the web travel rule has an acceleration phase in which the instantaneous values of acceleration in that phase are controlled as follows.
That is, when the web jumps up (it becomes a critical phase), the above acceleration has a small value in order to ensure the detachment of the web from the tool of the machine, and then control it to increase gradually. Is.

〔Example〕

With reference to the drawings, the device according to the invention ensures an intermittent feeding of a web 1, which may consist of any material, printed or unprinted, which is provided by a machine 2 arranged downstream, for example a flat-cutting press. It is operated in the stop position. The web 1 is continuously supplied from the upstream side at a constant speed V from some source such as a reel,
In FIG. 1, it moves from right to left in the direction of the molding device 2.

The supply device according to the invention has two horizontal and transverse tangential rollers between which the web passes, namely a lower take-up roller 3 and an upper tear roller 4. The take-in roller 3 under the web is rotationally driven by the above-mentioned machine such as a reel via the mechanical power transmission device shown in FIG. 1C. A gear 5 that is coaxial is fixed to the take-in roller 3, and the gear 5 meshes with a coaxial gear 6 that is fixed to an oscillating roller 7 located on the web 1, and thus two rollers are provided.
3,7 rotate in the opposite direction. The ratio of the original diameters of these gears 5,6 is responsible for the diameter ratio of the two rollers 3,7, and as a result
3,7 always rotate at the same peripheral speed.

The synchronizing roller 7 is rotatably mounted by a support body composed of a pair of parallel arms 8, and the roller 7 is located between the ends of the arms 8. The parallel arm 8 is used by the take-in roller 3
Is fixed radially to both ends of a horizontal and transverse hollow shaft that passes straight through coaxially. However, this arrangement is not limited, and the supporting body of the rocking roller 7 may be a single radial arm 8, in which case the rocking roller 7 is mounted in a cantilevered manner on this single arm 8. As shown in FIG. 2, the take-in roller 3 has a hollow shaft 9 through a rolling bearing 11.
It is rotatably installed with respect to. The hollow shaft 9 itself is mounted so as to be swingable in the side plate of the frame 12 via the rolling bearing 13.

The hollow shaft 9 for supporting the arm 8 and the resulting swinging roller 7 are fixed to a radial lever 14 at one end (the right end in the example shown in FIG. 2), and the swinging movement of the arm 8 is caused by this lever 14. Be transmitted to. Screw on this lever 14
A radial slider (radial sliding plate) 15 is fixed by 16 so as to be adjustable in position in the longitudinal direction. This slider
At the end of 15 is mounted a sliding block 17 which can be displaced radially on a needle runner 18. This sliding block
17 extends along the slider 15 and the lever 14
It is fixed to the lower end of a threaded rod 19 which engages a nut 21 near the pivot of 14, and the nut 21 itself is fixed to a coaxial toothed pulley 22 which surrounds the upper end of the threaded adjusting rod 19. This toothed pulley 22 is connected to another toothed pulley 24 on the other side of the device frame via a toothed belt 23 that extends straight inside the hollow shaft 9.
24 can be rotationally driven by a suitable control mechanism (not shown).

The sliding block 17 is fixed to a horizontal and horizontal spindle 25, and one end of a connecting rod (connecting rod) 27 is connected to the spindle 25 via a rolling bearing 26. Connecting rod 27
The other end of the drum 31 rotates horizontally and around a lateral pin 32.
Is connected to a crank pin 29, which is connected to the crank pin 29 by a general control C of the apparatus.
The crank pin 28 has two cam rollers 33,34 at its free end.
Respectively, these rollers 33, 34 rotate in two different transverse planes inside the fixed cam 35 and outside the fixed counter cam 36, respectively, so that these two cams 35, 36 carry out the desired motion rules. With the profile calculated as a function.

As shown in FIG. 1, the web 1 passes at a constant speed V between the take-up roller 3 and the upper shearing roller 4, bends on the outer peripheral surface of the take-up roller 3, and then the two gears 5, 6
The rocking roller 7 that rotates at the same peripheral speed V as the roller 3
It passes around the semi-peripheral surface. After curving under the rocking roller 7, the web rises to the left and is a suction type roller that permanently maintains the tension of the web 1 before entering the machine 2, or the outer peripheral portion of the "sliding" roller 37. Pass over. The suction type roller 37 rotates steadily at a peripheral speed Vt higher than the web speed V. Inside the suction type roller 37, a suction box 38 connected to a negative pressure source is provided. The suction box 38 is in contact with the inner peripheral surface of the roller 37, and a hole 39 is formed in the side surface of the roller. The position of the suction box 38 in the rotation direction of the suction type roller 37 and the position of its extension correspond to the portion of the outer peripheral surface of the suction type roller 37 where the web contacts.

When the web 2 is stopped in the forming device (machine) 2 such as a flat cutting press for a certain period of time, the mechanism for controlling the oscillating roller 7 changes this roller to the lower right and takes the take-in roller 3 and the suction type roller. Lengthen the web path to and from 37. This is because the web 1 is continuously supplied at the same speed V on the upstream side. Take-in roller 36
Since the peripheral speed of the rocking roller 7 driven by rotation is equal to the peripheral speed of the take-in roller 3, that is, the actual speed of the web 1, the arm 8 pivots downward and the rocking roller 7 descends. During this time, there is no slippage between the upper printing surface of the web 1 and the rocking roller 7.

When the work (for example, cutting out) on the machine 2 is completed,
The progress of the web inside the machine 2 is restarted, and at the same time, the arm 8 and the rocking roller 7 are decelerated, and as soon as the web speed inside the machine 2 becomes faster than the speed V, the arm 8 and the rocking roller 7 are moved.
Rises again, shortening the web path. When the web 1 is advanced in the machine 2 with the desired length corresponding to the mould, this web is stopped as before, and in addition to the lowering of the rocker rollers 7, a cycle of lengthening the web path is carried out. It will be restarted.

The oscillating roller 7 oscillates so that its oscillating time corresponds to an intermittent traveling cycle of the web 1 in the forming machine 2.

The pivotal movement of the arm 8 and the swing roller 7 supported by the arm 8 about the axis of the take-in roller 3 is controlled by the rotation of the drum 31 rotated by the general control C. The swing magnitude of the swing roller 7 as a function of the arm 8 and the mold is between the pivot pin (spindle) 25 of the connecting rod 27 on the slide block 17 and the swing shaft (that is, the axis of the take-in roller 3). Depends on the distance. This distance adjusts the longitudinal position of the slider 15 on the lever 14 when the device is in the rest position,
It can be roughly adjusted by fixing the slider 15 in place with screws 16. The angle settings of the cams 35 and 36 can also be changed. To this rough adjustment, fine adjustments that can be achieved during operation of the device can also be added. This fine adjustment is achieved during operation by rotationally driving a drive pulley 24 which transmits its movement to a toothed pulley 22 which is fixed via a toothed belt 23 to a nut 21 screwed into a threaded rod 19. It The rotation of the nut 21 is then converted into a translation of the rod 19 and the sliding block 17 which it supports. Since the toothed belt 23 is deformable and follows the swing of the arm 8, fine adjustment during operation becomes easy. These active fine tuning means further allow servo control of the device by some amount, such as web tension. Therefore, the second
As shown in the figure, the drive pulley 24 is attached to the shaft of the servomotor 37, and the servomotor 37 is electrically supplied by a device 38 connected to a sensor 39 for detecting the tension of the web 1, whereby the drive pulley 24 is It may be rotated so that the magnitude of the swing can be adjusted as a function of the tension of the web.

In the modified embodiment shown in FIG. 4, the rocking roller 7 is mounted by means of an arm 8 relatively far from the take-in roller 3 (in this embodiment, like the rocking roller 7, it is located above the web 1). The two rollers 7 and 3 are connected via a transmission mechanism 41, and the mechanism 41 surely drives the swing roller 7 to rotate in the same rotation direction and the same peripheral speed as the take-in roller 3. The transmission mechanism 41 may be constituted by a gear train or an endless toothed belt passing over two toothed wheels fixed to the two rollers 3 and 7.

[Brief description of drawings]

1 is a side view of a device according to the invention for feeding a web of material in a rest position to an operating machine; FIG. 2 is a horizontal and transverse section along line II-II of FIG. 3 is a partial side view of a mechanism for controlling the movement of the rocking roller; FIG. 4 is a partial side view of a modified embodiment. 1 ... web, 3 ... take-in roller, 4 ... displacement roller, 7 ... swing roller, 8 ... support (arm).

Claims (10)

(57) [Claims] 1. A web material continuously supplied on the upstream side of a machine is brought into contact with each other and driven to rotate at a constant peripheral speed,
A device for feeding a web material at a stop position to the operating machine by passing it between a pair of take-up rollers and a pair of take-up rollers each having a horizontal and lateral axis, the web moving direction in the vicinity of the take-up rollers. A swing roller that is located on the downstream side and is rotatably installed on a support body that is swingable around the axis of the take-in roller; the support body; and the swing roller supported by the support body,
Means for maintaining the tension of a web placed at the entrance of the machine, and periodically controlling the rocking of the support and the rocking roller to cause the take-up roller and the machine to move. And a means for increasing or shortening the length of the web path between them to give a desired rule to the progress of the web material inside the machine including a stop phase, wherein the rocking roller is transferred from the take-in roller via a transmission mechanism. The peripheral speed of the oscillating roller is driven to rotate, and the peripheral speed of the oscillating roller is equal to the speed of the web material swiveling around the outer peripheral portion of the oscillating roller, so that the web material makes contact with the surface of the oscillating roller without slipping. A web feeding device characterized by. 2. The take-up roller located under the web is fixed to a coaxial gear that meshes with a coaxial gear fixed to a rocking roller located on the web, and the ratio of the original diameters of both gears fixes the gear. 2. The device according to claim 1, wherein the diameter ratio of both rollers is equal, so that the two rollers are rotationally driven in the opposite directions at the same peripheral speed. 3. The oscillating roller located on the web is attached to the oscillating roller below the web via a transmission mechanism that achieves rotation of the oscillating roller at the same rotational direction and at the same peripheral speed as the ingesting roller. The device of claim 1, wherein the device is coupled. 4. A support for the oscillating roller has at least one arm fixed to a horizontal and transverse hollow shaft passing straight coaxially through the take-in roller. 2. The device according to claim 1, wherein is mounted rotatably on the hollow shaft via rolling bearings, and the hollow shaft is mounted swingably within the side plates of the frame via rolling bearings. 5. The hollow shaft has one end fixed to a radial lever whose length is adjustable, and one end of the radial lever supports a sliding block connected to an end of a reciprocating connecting rod. The device of claim 4 characterized. 6. A radial slider is fixed on the lever by a screw so that the radial position of the slider can be adjusted in the longitudinal direction, and a sliding block which is displaceable in the radial direction is installed at an end of the slider, and the block is arranged along the slider and the lever. A coaxial shaft that is fixed to the lower end of a threaded rod that extends and meshes with a nut near the pivot axis of the lever, which is itself connected to another drive pulley via a toothed belt that extends straight through the hollow shaft. The device according to claim 5, wherein the device is fixed to a toothed pulley, and the drive pulley is located on the other side of the device frame and is rotationally driven. 7. The apparatus of claim 6 wherein said drive toothed pulley is fixed to a servomotor shaft of a device which servos by some amount such as web tension. 8. The device according to claim 5, wherein the sliding block is fixed to a horizontal and lateral spindle, and the end of the connecting rod is connected to the spindle via a rolling bearing. 9. The other end of the connecting rod is connected to a crank pin, the crank pin is connected via a pin to a drum rotating about horizontal and lateral pins, the crank pin having two cam rollers at its free ends. 9. The device according to claim 8, wherein said cam rollers rotate in two different transverse planes, respectively, inside the fixed cam and outside the fixed counter cam. 10. The above-mentioned means for maintaining the tension of the web entering the machine comprises a suction type roller which rotates steadily at a peripheral speed higher than the peripheral speed of the web, and a negative roller located inside the suction type roller. A suction box connected to a pressure source, the suction box contacts a part of the inner peripheral surface of the roller, the side surface of the roller has a hole, and the suction box in the rotation direction of the suction type roller, The apparatus according to claim 1, wherein the position of the extension portion corresponds to the contact portion of the web on the outer peripheral surface of the suction type roller.