JPS5919008B2 - Fixed size correction device for rotary type clipper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention continuously cuts a continuous band-shaped thin plate such as a veneer veneer or paper carried out from a processing device in the previous stage into a desired standard size ι1 while continuing to convey the same. This invention relates to an improvement of a drive mechanism related to a fixed size correction device in a rotary type clipper.

Conventionally, this type of rotary type clipper that uses a differential gear mechanism for its drive mechanism as a fixed size correction device is disclosed in, for example, the paper cutting method disclosed in Japanese Patent Application Laid-open Nos. 50-107584 and 1982-110176. There are synchronized cutters for paperboards, and the synchronized cutting method for paperboard disclosed in JP-A No. 50-110177, but all of these methods use a synchronized cutter to match the rotational speed of the cutter drum with the paper feeding speed during cutting. A differential gear and two motors are used for the purpose of matching the paper feed speed and the rotational speed of the cutter drum so that the peripheral speed of the cutter drum is increased or decreased immediately before cutting and then returned to the original speed immediately after cutting. Since rotation control was performed by combinations, for example, the start-up of a servo motor that matched the rotation speed of the cutter drum,
If there are variations in the fall time, the speed per rotation of the cutter drum changes relative to the paper feed speed, which is a serious defect that immediately causes cutting errors. For servo motors that have the purpose of matching, it is necessary to minimize variations in the rise and fall times of the servo motors and fluctuations in the respective rotation speeds, and this type of servo motor has high precision and high response. This required a powerful servo motor and an associated complicated and expensive control device.

In addition, in this type of cutter drum type rotary clipper, the circumferential dimension of the cutter drum is ι2 compared to the fixed length na method tl.
The diameters are adjusted so that they are approximately equal, and the standard size t
When there was a change in l, the standard size ι1 was changed by changing the speed of one rotation of the cutter drum relative to the paper feed speed, so generally speaking, the drum diameter was large and This type of cutter drum type rotary clipper, which has a large inertia, has serious functional defects that make it completely unsuitable for intermittent conveyance of thin plates. In other words, the present invention solves the serious functional defects caused by the speed fluctuations of the conveyed object in the conventional device by further associating a regular size correction rotation mechanism with the differential gear mechanism. The present invention will now be described in detail with reference to an example of its implementation, which has succeeded in completely eliminating this problem and is shown in the accompanying drawings. First of all, the motor,
Rotation by a drive device 1 comprising a speed reducer or the like is transmitted to a first intermediate shaft 4 via a chain wheel 2 and a chain wheel 3. The rotation transmitted to the first intermediate shaft 4 is transmitted to the chain wheel 5.
and is transmitted to the second intermediate shaft 7 via the chain wheel 6,
The second intermediate shaft 7 rotates the rotor armature 10 via a chain wheel 8 and a chain wheel 9, and is also connected to an input shaft 11a mounted on a sun gear on the other side of the differential gear mechanism 11. The roll anvil 10
interlock so that they rotate in the same direction. The input shaft 11 is mounted on one of the sun gears of the differential gear mechanism 11.
b is a standard size correction rotation mechanism 14 via the third intermediate shaft 12;
is connected to. The standard size correction rotation mechanism 14 rotates the input shaft 11b, which is mounted on the other sun gear of the differential gear mechanism 11, into the knife 13a with respect to the standard size tl.
The input shaft 11a can be rotated in the opposite direction by a rotation corresponding to the correction dimension (t1-T2=T3) that is insufficient in the circumferential dimension T2 of the cutting edge of the cutter curl 13 in one rotation. The regular dimension correction rotation mechanism 14 is constructed by integrally connecting a gear 14a with a direction rotation element, a rack 14b engaged with the gear 14a, an air cylinder 14c reciprocating the rack 14b, etc. . Further, the third intermediate shaft 12 is an electromagnetic brake for preventing the third intermediate shaft 12 from freely rotating when the gear 14a of the regular dimension correction rotation mechanism 14 is not rotating in one direction. , a tooth clutch, a band brake, or the like.
Furthermore, the input shaft 11a of the differential gear mechanism 11 is mounted on a planetary gear that rotates in accordance with the rotational difference between the input shaft 11a mounted on one sun gear and the human power shaft 11b mounted on the other sun gear. The output shaft 11c is configured to rotate the cutter roll 13 via a chain wheel 16 and a chain wheel 17. Next, the cutter roll 1
3 is the position where the air cylinder 14c of the regular size correction rotation mechanism 14 starts its forward movement, that is, the cutting edge of the knife 13a attached to the cutter roll 13 is cut into the surface of the thin plate 18, and the cutting edge is cut into the thin plate 18. The cam 19 is equipped with a cam 19 that informs the optimum position of the area other than the cutting area during one rotation until the knife 13a is pulled out from the surface of the knife 18, for example, the position immediately after the cutting edge of the knife 13a is pulled out from the thin plate 18,
A first detector 20 consisting of a limit switch, a proximity switch, a photoelectric switch, etc. facing the cam 19 detects its position and transmits it to a control circuit 21. At the same time as the detection signal is transmitted, the braking device 15, which is in a braking action to prevent the third intermediate shaft 12 from freely rotating, is controlled to release the braking action, and the fixed length dimension correction rotation mechanism 14 is controlled to release the braking action.
A command is sent to the air cylinder 14c to start forward movement, and the rack 14b is advanced, and the gear 11a connected to the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is rotated by a predetermined number of rotations. make it move. In addition, the rack 14b has a stopper 14d disposed at the front in the forward direction.
Its forward movement is stopped at a predetermined position. Furthermore, a limit switch, a proximity switch,
A second detector 22 consisting of a photoelectric switch or the like is installed, and the second detector 22 transmits a detection signal to the control circuit 21 when the tip of the rack 14b is stopped by the stopper 14d. Therefore, at the same time as the detection signal from the second detector 22 is transmitted, the control circuit 21 causes the braking device 15 to resume the braking operation so that the third intermediate shaft 12 does not rotate freely. Then, the air cylinder 1 of the standard size correction rotation mechanism 14
4c to move backward, the rack 14b is returned to its original position in preparation for the next length adjustment operation. Incidentally, since the gear 14a at this time is equipped with a cam clutch that can transmit rotation only in one direction, the gear 14b
As the gear 14a moves, the gear surface of the gear 14a rotates in the opposite direction to the previous direction, but is connected to the input shaft 11b mounted on one sun gear of the differential gear mechanism 11, which is stopped by the braking device 15. The third intermediate shaft 12 does not rotate at all. Therefore, with the above configuration, for example, if the input shaft 11a mounted on the roll anvil 10, that is, one sun gear of the differential gear mechanism 11, reaches the desired standard size t1 when the input shaft 11a rotates four times, then the cutter roll 13 is allowed to rotate only one rotation, the rotation required of the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is 4-1=3 rotations, and the rotation required for the input shaft 11b is 4-1=3 rotations, which corresponds to these 3 rotations. The moving distance of the rack 14b of the fixed length dimension correction rotation mechanism 14 is set to the fixed length dimension correction distance Tx by the stopper 1.
It is sufficient to set it in advance using 4d. Therefore, when the cutter roll 13 set in this manner is detected by the first detector 20 at the position of point P as shown in FIG. 2, the detection signal is transmitted to the control circuit 21, and the control circuit 21 At the same time as the braking operation of the braking device 15 is released, the air cylinder 14e of the regular dimension correction rotation mechanism 14 is activated to rotate the gear 14a. At this time, the forward speed of the air cylinder 14c, that is, the rotational speed V1 of the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is the input shaft mounted on the other sun gear of the differential gear mechanism 11. 11a
The rotation speed V2 is set at the same speed as or slower than the rotation speed V2. The reason is that the rotational speed V2 of the input shaft 11a mounted on one sun gear of the differential gear mechanism 11 is
On the other hand, if the forward speed of the air cylinder 14c, that is, the rotational speed V1 of the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is slow, then the differential gear mechanism 11
The rotation of the output shaft 11c is the speed (V
2-1=V3), the cutter roll 13 connected to the output shaft 11c rotates in the same direction as the previous rotation direction, and the cutter roll 13 is rotated at a slower speed than the previous rotation at the same speed as the roll anvil 10. The forward speed of the air cylinder 14c is the same as the rotational speed 2 of the input shaft 11a, which rotates at If the rotational speeds Vl of the input shafts 11b connected to the differential gear mechanism 11 are the same, the rotation of the output shafts 11c of the differential gear mechanism 11 will stop because there is no difference in their rotational speeds, and the output shafts 11c connected to the output shafts 11c will stop rotating. The cutter roll 13 is decelerated more rapidly than the previous rotation at the same speed as the roll anvil 10, and stops when the rotation of its partner reaches the same speed. The rotational speed V of the input shaft 11a
2, if the forward speed of the air cylinder 14c, that is, the rotational speed V1 of the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is high, the differential gear mechanism 11
The rotation of the output shaft 11c mounted on the planetary gear becomes the speed of the difference in the respective rotation speeds (V2-V1=V3), so the speed V3 becomes negative and the output shaft 11c rotates in the opposite direction to the previous rotation direction. If this continues, the cutter roll 13 connected to the output shaft 11c will rotate at a speed V3 in the opposite direction, with its rotation being reduced in speed compared to the previous rotation at the same speed as the roll anvil 10, thereby interfering with the conveyance of the thin plate 18. In some cases, there is a possibility that the knife 13a may cut into the thin plate 18 again, so in order to prevent this problem, a reversal prevention mechanism 23 is provided. The gear 23a mounted on the gear 23a and the gear 23c mounted on the fourth intermediate shaft 23b obtain rotation in a direction opposite to the rotational direction of the input shaft 11a mounted on one sun gear of the differential gear mechanism 11. The cam clutch mounted on the third intermediate shaft 12 connected to the input shaft 11b mounted on the other sun gear of the differential gear mechanism 11 is transmitted to the internally mounted chain wheel 23e by the chain wheel 23d mounted coaxially. Accordingly, the differential gear mechanism 11
The chain wheel 23e is configured to idle at the same speed as the rotational speed V2 of the input shaft 11a mounted on one of the sun gears. With this configuration, the third intermediate shaft 12 is allowed to rotate at any speed as long as the rotation speed of the chain wheel 23e is 2 or less, but if the rotation speed is higher than that, the chain wheel 23e is rotated at an arbitrary speed. 23e
Since the cam clutch installed in the third intermediate shaft 12 acts to limit the rotation of the third intermediate shaft 12 to the speed of the chain wheel 23e, the arbitrary forward speed of the air cylinder 14c is synchronized with the speed of the chain wheel 23e. It will continue. Further, this reverse rotation prevention mechanism 23 works most effectively because the above-mentioned reverse rotation condition is likely to occur frequently when the transportation device 1 is of an intermittent drive type. Next, FIG. 3 shows another embodiment in which a drive device 1 and a roll anvil 10 are connected to an input shaft 11a mounted on one of the sun gears via a chain wheel 8 and a chain wheel 9, and a cutter roll 13 A differential gear mechanism 11 connected to an output shaft 11c (corresponding to the input shaft 11b in the above embodiment) mounted on the other sun gear via a chain wheel 16 and a chain wheel 17;
The cutting edge of the knife 13a of the cutter roll 13 cuts into the surface of the thin plate 18 the other input shaft 11b (corresponding to the output shaft 11c of the above-mentioned embodiment) mounted on the planetary gear of the differential gear mechanism 11. In the area other than the cutting area during one rotation from when the cutter roll 13 is pulled out until it is pulled out, only the rotation corresponding to the correction dimension (t1 - T2 = T3) that is insufficient in the circumferential dimension T2 of one rotation of the cutter roll 13 with respect to the standard length dimension t1 is applied. The input shaft 11b is rotatably connected in one direction to a regular dimension correction rotation mechanism 14 consisting of a rotary actuator through a chain wheel 24 and a chain wheel 25 which are equipped with a one-way rotation element such as a cam clutch. A continuous belt-shaped thin plate is divided into a circumferential dimension T2 of one rotation of the cutter roll 13 and a modified dimension T by the fixed length dimension modification rotation mechanism 14.
3 is added to the desired standard size t1 each time while cutting.

Further, the detector 20 detects the cam 19 and transmits the detection signal to the control device 21, and the control device 21 releases the braking operation by the braking device 15, and at the same time, a fixed length dimension correction rotation mechanism consisting of a rotary actuator etc. 14 to rotate the other input shaft 11b mounted on the planetary gear of the differential gear mechanism 11, and to operate the reverse rotation prevention mechanism 23 between the input shaft 11a and the input shaft 11b. This is the same as in the previous embodiment. As described above, the present invention includes a differential gear mechanism 11 in which the drive device 1 and the roll anvil 10 are connected to one human power shaft 11a and the cutter roll 13 is connected to the output shaft 11c, and the other side of the differential gear 11. input shaft 11
b, and inputs a correction rotation corresponding to the standard size correction distance Tx to the other input shaft 11b, the continuous strip-shaped thin plate 18 is cut into one of the cutter rolls 13. Since it was possible to cut while correcting each time to the fixed length dimension t1, which is the addition of the circumferential dimension T2 of rotation and the corrected dimension T3 by the fixed length dimension correction rotation mechanism 14, the rotation of the cutter roll 13 was adjusted to the feeding speed of the thin plate 18. The speeds are matched mechanically and accurately, and the correction dimension T3 is determined by the amount of rotation of the gear 14a or chain wheel 24 determined by the correction distance Tx of the rack 14b of the standard size correction rotation mechanism 14 or the rotary actuator. Since it can be calculated mechanically, there is no variation in the cut dimensions even if the speed of the conveyed object varies, and the fixed length dimension correction rotation mechanism 14 does not require high precision and high response like the servo motor of conventional equipment. Therefore, a complicated and expensive control device is not required, and the circumferential dimension T2 of the cutter roll 13 can be made small regardless of the standard size dimension t1, so that a standard length cutting device such as a horizontal stripping device in which the thin plate 18 is conveyed intermittently can be used. For the first time, we have been able to provide a rotary type clipper for strings equipped with a standard size correction device, which can be used as is for strings, and whose application range is not limited by speed fluctuations of the conveyed object. It is something.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is a diagram of the drive mechanism, Fig. 2 is a diagram of the relationship between the circumferential dimension of the cutter roll, the corrected dimension, and the regular dimension, and Fig. 3 is another embodiment. FIG. 3 is an example drive mechanism diagram. DESCRIPTION OF SYMBOLS 1... Drive device, 10... Roll anvil, 11... Differential gear mechanism, 11a, 11
b...Input shaft, 11c...Output shaft, 1
3...Cutter roll, 14...Standard dimension correction rotation mechanism, 14a...Gear 14b.
...Rack, 14c...Air cylinder 18...Thin plate.

Claims (1)

[Claims] 1. A rotary type clipper consisting of a roll anvil for cutting a continuous strip of thin plate such as veneer veneer into a desired fixed size, a cutter roll facing the roll anvil, and a drive device for driving the roll anvil and cutter roll. , a differential gear mechanism in which the drive device and the roll anvil are connected to one input shaft and the cutter roll is connected to the output shaft, and the differential gear mechanism is connected to the other input shaft of the differential gear mechanism, and has standard dimensions A continuous strip-shaped thin plate is cut while being corrected to a desired fixed length each time by a fixed length dimension correction rotation mechanism that inputs a correction rotation corresponding to the correction distance to the other input shaft. Features: A fixed size correction device for rotary type clippers.