JP4426233B2 - Cutting method and cutting apparatus - Google Patents

Description

  The present invention relates to a method and apparatus for accurately cutting an end face of an endless belt used in a copying machine or the like.

Accompanying higher speed and higher image quality of copiers, the required accuracy required for endless belts to be used has become stricter in order to stabilize misalignment of transported paper, misalignment of transferred images, and distortion. It is coming. For this reason, in addition to elongation and deformation of the endless belt, the cutting accuracy (existence of unevenness, linearity, etc.) of the endless belt has become a major issue in order to control the meandering of the endless belt during traveling. .
On the other hand, in recent years, there is an increasing demand for increasing the circumference of an endless belt used as a means for realizing color and high speed copying machines. In some cases, a long belt having an endless belt circumference of 2 m or more is required.
Furthermore, even in a conventional size endless belt, in order to obtain a plurality of belts from one belt in order to increase productivity, the width of the endless belt before cutting is increased (two or three). ing.

  Conventionally, as a method for cutting the end face of such an endless belt, the prior application proposed by the present applicant is to insert an endless belt into an axially divided drum (external fitting) and to expand the drum. The body is inflated by injecting air, and the diameter of the drum is enlarged and pressed against the endless belt to fix the endless belt. Then, the drum is rotated and both ends of the endless belt are cut by a cutter disposed opposite to the endless belt surface. (For example, Patent Document 1)

Furthermore, the invention described in another prior application is such that the tube body is supported and fixed to the mold by spreading the mold in which the link member is connected to a plurality of members divided into two parts or three or more parts. The circular blade is moved to the position of the selected circumferential groove among the circumferential grooves arranged in large numbers, and cut into a circular shape at the position of the selected groove. Even if there is a defective part in the tube body, it is possible to easily obtain an endless belt. (For example, Patent Document 2)
Japanese Patent Laid-Open No. 08-025283 JP 2002-355789 A

As described in Patent Document 1 and Patent Document 2, in the method of inserting and cutting an endless belt into a drum or mold, in order to accurately cut the endless belt, a perfect circle of the drum or mold is used. Degree and rotational accuracy become very important. However, as the circumferential length and width of the endless belt increase, it becomes very difficult to ensure the roundness and rotational accuracy of the drum and the mold. In addition, when the circumference of the endless belt is changed, it is necessary to change the drum and die, so that it is necessary to manufacture a new device, which involves problems in terms of versatility and increases the cost of the device. There was a point.
Furthermore, since the outer diameter of the drum or mold is only slightly smaller than the inner diameter of the endless belt, the endless belt is inserted when the endless belt is inserted into the drum or mold as the circumference or width of the endless belt increases. As a result, defects such as breakage are likely to occur, and this is a factor that decreases the yield.

  The problems to be solved are that, in the case of an endless belt having a large circumferential length and width, it is difficult to accurately cut the width dimension with the conventional cutting method and cutting apparatus, and the width dimension is cut. That is, the versatility with respect to the change in the size of the endless belt is small, and the occurrence of defects such as breakage when the endless belt is inserted.

In order to solve the above problems, the present invention provides a cutting method in which an endless belt is stretched over a plurality of rolls including a drive roll and a meandering correction roll, and the endless belt is moved between the rolls so that the end face of the endless belt becomes an endless belt. It is a method of cutting with opposing cutting blades, placing markings on the endless belt, calculating the amount of meandering by detecting the position of the edge at a certain circumferential distance from the marking position for each turn, Based on the meandering amount, the meandering roll is corrected by changing the inclination of the axis of the meandering correction roll, and after the meandering amount falls within a predetermined range, the end face is extended over the entire circumference of the endless belt by the cutting blade. while said cutting method characterized by cutting the cutting device of the present invention, to pass run over an endless belt into a plurality of rolls including a drive roll A belt conveying unit, an edge detecting unit for detecting the position of the edge of the end face of the traveling endless belt, a meandering correcting unit for correcting the meandering of the traveling belt by inclining the axis of the predetermined roll, and a cutting blade A cutting section that cuts an end face of the endless belt that is disposed so as to be capable of moving forward and backward facing the endless belt, and after the endless belt is cut into a predetermined dimension by the cutting blade, the endless belt is cut by the edge detecting means. It is possible to evaluate the end face straightness of the endless belt by detecting edge positions at regular intervals over the entire circumference of the belt.

In order to solve the above problems, the present invention provides a cutting method in which an endless belt is stretched over a plurality of rolls including a drive roll and a meandering correction roll, and the endless belt is moved between the rolls so that the end face of the endless belt becomes an endless belt. A method of cutting with opposed cutting blades, calculating the meandering amount by detecting the position of the edge every round at the timing calculated from the circumference of the endless belt and the rotation amount of the drive roll, and the meandering amount Based on the above, the meandering is corrected by changing the inclination of the axis of the meandering correction roll, and after the meandering amount falls within a predetermined range, the end face is cut over the entire circumference of the endless belt by the cutting blade. while said cutting and wherein the cutting apparatus of the present invention, a belt conveyor unit for passing traveling over the endless belt into a plurality of rolls including a drive roll An edge detection unit for detecting the position of the edge of the end face of the traveling endless belt, a meandering correcting unit for correcting the meandering of the traveling belt by tilting the axis of the predetermined roll, and a cutting blade in the endless belt And a cutting section that cuts the end face of the endless belt that is disposed so as to be able to move forward and backward, and cut the endless belt to a predetermined size with the cutting blade, and then the edge detection means makes an entire circumference of the endless belt. In addition, it is possible to evaluate the end face straightness of the endless belt by detecting the edge positions at regular intervals.

  In order to cut the end face of the endless belt with higher accuracy, the cutting blade is arranged so as to be movable in the width direction of the endless belt, and the width of the endless belt is set to a predetermined size in advance before adjusting the meandering of the running endless belt. After cutting larger, the meandering correction is performed, and the end face of the endless belt is re-cut to a predetermined size, and the cutting blade of the cutting part is disposed on a roll fixedly arranged to be rotatable. The running endless belt is cut over the entire circumference by engaging with a narrow groove provided on the surface of the roll fixedly supported opposite to the belt.

  Next, in order to enable a versatile cutting device, the predetermined roll of the meandering correction portion is supported in a state where movement of the endless belt in the width direction is restricted, and tension is applied to the endless belt by its own weight. Since it is set as the structure to provide, even if the circumference of an endless belt changes, it can respond.

  Furthermore, after the endless belt is cut to a predetermined size by the cutting blade, the edge detection means evaluates the end face straightness of the endless belt by detecting edge positions at regular intervals over the entire circumference of the endless belt. It features a cutting device that makes it possible.

The endless belt is stretched over multiple rolls, and while running between the rolls, the meander is corrected and the end face is cut, so changing the size of the endless belt is possible, and a large circumference and width can be accommodated. Even with the endless belt, it can be cut with high accuracy.
In addition, the endless belt is tensioned by the weight of a predetermined roll and the meander of the traveling endless belt is corrected by tilting the axis of the roll from the outside, so that the device configuration becomes easy and the device cost can be reduced. It becomes possible.
Further, when the endless belt is passed over a plurality of rolls, the distance between the axes of the predetermined roll is indefinite, and after passing over the other rolls, the predetermined roll may be passed over. There is no need to be scratched or worry about the occurrence of folds.

Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 3 of the examples, and the contents thereof will be disclosed in detail.
The plurality of rolls including the drive roll 2 may be a combination of the drive roll 2 and the meandering correction roll 4, or a combination of the drive roll 2, the driven roll 3 and the meandering correction roll 4. There may be. If the peripheral length of the endless belt 1 is further increased, it is possible to increase the number of driven rolls as appropriate. However, in order to prevent the occurrence of bending or the like when the endless belt 1 is inserted into the cutting device 50, The number is preferably the minimum number.
A motor 12 is connected to one end of the drive roll 2 to run the endless belt 1 at a predetermined speed. The motor 12 is preferably a pulse motor such as a servo motor or a stepping motor in order to calculate the amount of movement of the endless belt 1. A configuration in which a sensor such as an encoder for calculating the rotation speed is attached may be used.

The tension applied to the traveling endless belt 1 is preferably close to that normally used in a copying machine or the like, but is not particularly limited as long as the endless belt 1 travels normally. The method of applying tension by the weight of any of the rolls is preferable because it can be implemented with the simplest device configuration, but other methods may be used.
In addition, it is preferable that all rolls have a straight shape on the surface of each roll in order to cut with high accuracy. On the other hand, in order to facilitate correction of meandering, it is desirable to consider the shape of the surface of one roll (meandering correction roll) among the plurality of rolls so that the central portion in the width direction has a middle height. However, depending on how the cutting device is used, for example, when two rolls are taken from a wide endless belt, the roll is cut at the center of the roll. What is necessary is just to select a shape.

For example, the cutting device 50 is provided with cantilever members 10 and 14 on a device frame 20 provided vertically on a base stand (not shown) of the device 50, and the cantilever member 10 has a meandering correction portion and a meandering correction roll 4. A support portion (not shown) is disposed on the cantilever member 14, and each belt conveyance portion, an edge detection portion, and a grip portion for the meandering correction roll 4 are arranged.
Further, the cantilever member 10 is movably attached to an arbitrary position in the vertical direction with respect to the apparatus frame 20 by a driving device (not shown). Accordingly, it is possible to cope with a large size change of the endless belt 1 within the limit of the predetermined range, and it is possible to move the endless belt 1 to the lowest stage when the endless belt 1 is inserted into the cutting device 50.
With the above apparatus configuration, when the endless belt 1 is attached to and detached from the cutting apparatus 50, the arrangement state of the roll can be made smaller than the inner diameter of the endless belt 1, and an unnecessary configuration from the periphery of the roll. Since it is possible to eliminate the parts, it can be easily attached and detached by an operator, and this is the most preferred embodiment.
The cantilever member 10 can also be applied as a both-end support structure that supports both ends of the cantilever member 10 by separately providing a frame from a base base. Although it is necessary to devise a configuration in which the endless belt 1 can be hung on each roll of the section and a detachable roll, the present invention can be applied even in such a case.

In the cutting device 50 of the present invention, the meandering of the endless belt 1 traveling before the cutting operation is corrected in order to perform high-precision cutting. In some cases, both ends of the endless belt 1 may be cut. In such a case, since the position of the end face of the endless belt 1 exceeds the readable range of the edge detection sensor used, the meandering correction may not be possible.
Even if reading is possible with the edge detection sensor, the edge position may change significantly due to slight deviation in the circumferential direction of the reading position, making it difficult to correct meandering, and worsening accuracy, etc. Problems occur.
Even if the meandering can be corrected, the running state of the endless belt 1 becomes unstable due to the variation in the end face shape, and the linearity at the time of cutting deteriorates.
For this reason, it is desirable to pre-cut at least one end face of the endless belt 1 that travels before the meandering correction with a margin in advance. By doing so, it can be expected that the meander detection and cutting accuracy will be further improved.

Further, in order to cut the end face of the endless belt 1 with high accuracy, the meandering amount is corrected while the endless belt 1 is running, and after the value falls within a predetermined range, the belt end face is cut into a predetermined dimension. The cutting blade 18 is disposed on a roll that is rotatably supported and fixed. By engaging with a narrow groove 16 provided on the roll surface, the cutting blade 18 can cut the cutting surface with good cutting efficiency. Further, both end surfaces of the endless belt 1 can be cut at a time by arranging and operating two cutting blades 18.

Furthermore, it is possible to evaluate the accuracy of the cut endless belt 1 by running the endless belt 1 cut to a predetermined dimension while detecting both end surfaces at regular intervals by the edge detector. It is a preferred embodiment to evaluate the end face straightness.

FIG. 1 is a side view of the main part of the cutting device 50. In the belt conveyance unit, the endless belt 1 is wound around the drive roll 2 and the driven roll 3, and the meandering correction roll 4 is regulated in the width direction of the belt 1. In this manner, the belt 1 is wound around the lower belt 1 between the drive roll 2 and the driven roll 3 so that tension is applied to the belt 1 by its own weight.
Both the driving roll 2 and the driven roll 3 are rotatably supported by a bearing 11 fixed to a member 15 on a cantilever member 14 shown in the figure. A drive motor 12 is connected to the shaft end of the drive roll 2.

The edge detection unit appropriately arranges the photoelectric displacement meter 17 shown in the drawing, that is, a transmission laser displacement meter, a line camera, etc. so that the edge of the traveling endless belt 1 can be detected. A control unit (not shown) for calculating and controlling data is also provided.
The method of detecting the meandering amount is not particularly limited, but a mark (a hole or a notch may be provided if it becomes a mark) is provided on the end edge of the endless belt 1, and the circumference of the endless belt 1 is separated by a certain circumference. It is preferable to detect the edge position every round and compare it with the previous data.
The mark provided on the endless belt 1 may be provided at the center of the endless belt 1, but in that case, a sensor for detecting the mark such as a photoelectric sensor needs to be provided separately.
The photoelectric displacement meter 17 may be used for measuring the width dimension of the endless belt 1 as well as detecting meandering and evaluating the end face straightness.
The timing for detecting the edge position of the running endless belt 1 is preferably based on the mark, but since the circumference of the endless belt 1 is known, one round is detected at a timing calculated from the rotation amount of the timer or the driving roll. You may do it.

As shown in FIG. 3, the meandering correction unit is configured such that the meandering correction roll 4 is wound so as to apply tension to the endless belt 1 by its own weight, and hooked bearings 21 are attached to both ends of the shaft. . One of the flanged bearings 21 is in contact with a fixed piece 8 that comes into contact with and is fixed to the bearing 21, and the other bearing 21 is in contact with a spindle 7 that moves linearly in units of μ by the stepping motor 5. The position of the spindle 7 is moved according to the calculated meandering amount, and the meandering of the endless belt 1 is corrected by changing the inclination of the axis of the meandering correction roll.
The amount of movement of the spindle 7 may be determined in advance by examining the relationship between the amount of movement of the spindle 7 and the amount of meandering of the endless belt 1 for each peripheral length of the endless belt 1. May be moved gradually in one direction, and when the meandering direction is reversed, the spindle 7 may be moved in the opposite direction while further reducing the amount of movement.

The cutting portion is a cutting blade 18 disposed to face the endless belt 1 that travels as shown in FIG. 1, and is provided so as to be able to contact with and separate from the endless belt 1 by an appropriate driving device (not shown). Although the position in particular is not restrict | limited, Preferably it is good to arrange | position on the drive roller 2 arrange | positioned fixedly. In addition to the roll for winding the endless belt 1, a cutting roll, a receiving plate, and the like may be separately arranged. Further, the surface of the drive roll 2 is provided with a narrow groove 16 facing the cutting blade 18, and the tip of the cutting blade 18 is engaged with the narrow groove 16, so that cutting with high end surface accuracy (returning and no chattering) is achieved. ) Becomes possible.
Two sets of cutting blades 18 are arranged corresponding to both end surfaces of the endless belt 1, and the meandering correction is completed and the endless belt 1 is cut in contact with the traveling endless belt 1, so that the width of the endless belt 1 is accurately determined. Cut becomes possible. In addition, a plurality of endless belts may be cut at a time by increasing the number of cutting blades as necessary.
The cutting blade 18 can be applied to a rotary disk type rotary blade regardless of the cutter type as shown in the figure, and can be applied to other types and is not particularly limited.

Next, a specific embodiment will be described with reference to FIG. 1 to FIG.
Procedure 1 An operator hangs the endless belt 1 supplied from the previous process to the drive roll 2 and the driven roll 3. At this time, the meandering correction roll 4 is fixed to a gripping portion (not shown) provided on the cantilever member 14.
2. The cantilever member 10 is raised and the meandering correction roll 4 is delivered to a support (not shown) and then lowered, and the meandering correction roll 4 is wound around the endless belt 1. At that time, the hooks of the hooked bearing 21 attached to both shaft ends of the meandering correction roll 4 are engaged with the fixed piece 8 fixed to the cantilever member 10 and the linear motion spindle 7.
3 The endless belt 1 is driven by driving the belt conveying unit, and after confirming that the endless belt 1 is running stably, one end edge is pre-cut with a margin (about 5 mm larger).
4 After stopping the travel of the endless belt 1, the cut waste is removed and a mark is provided on the endless belt 1.
5 Run the endless belt 1 again and detect the edge of one end of the endless belt 1. The edge to be detected is a fixed point separated by a certain circumferential length with reference to the mark provided on the belt 1, and is detected for each round of the belt, and the meandering amount is calculated from the numerical value, and the meandering roll 4 of the meandering correction roll 4 is calculated based on the value. On the other hand, the position of the shaft end bearing 21 is corrected.
6 After the meandering amount calculated by the edge detection unit falls within a predetermined range (10 μm in the embodiment), a set of two cutting blades 18 are set according to the predetermined dimensions of the endless belt 1 and the endless belt 1 is run. While cutting, both end surfaces are cut.
7 After stopping the travel of the endless belt 1, remove cutting waste at both ends. The endless belt 1 is run again, the edges of both end faces are detected at regular intervals over the entire circumference, and the width dimension of the endless belt 1 and the end face straightness of each end face are measured.
8 After stopping the travel of the endless belt 1, the meandering correction roll 4 is removed, and the endless belt 1 is detached.
In the above procedure, the cutting waste after cutting is manually removed, but of course there is no problem even if the cutting waste is automatically removed.

It can be applied to endless belts with a short circumference such as those cut with a conventional drum type or with a larger circumference. After cutting both end faces, the finished dimensions of the belt can be accurately measured. It is a cutting device that can be confirmed, and has great versatility and a great practical effect.

It is a principal part side view of the cutting device of the present invention. It is an AA arrow directional view of the cutting device of the present invention. It is a BB arrow line view of the cutting device of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endless belt 2 Drive roll 3 Driven roll 4 Meandering correction roll 5 Stepping motor 10 Cantilever member 11 Bearing 12 Drive motor 16 Narrow groove 17 Photoelectric displacement meter 18 Cutting blade

Claims (6)

An endless belt is a method in which an endless belt is stretched over a plurality of rolls including a drive roll and a meandering correction roll, and is run between the rolls, and the end surface of the endless belt is cut by a cutting blade disposed opposite to the endless belt. A marking is arranged, and the meandering amount is calculated by detecting the position of the edge at a certain circumferential distance from the marking position for each turn, and based on the meandering amount, the axis of the meandering correction roll The cutting method is characterized in that the meandering is corrected by changing the inclination, and the end face is cut over the entire circumference of the endless belt by the cutting blade after the meandering amount falls within a predetermined range.
An endless belt is a method in which an endless belt is stretched over a plurality of rolls including a drive roll and a meandering correction roll, and is run between the rolls, and the end surface of the endless belt is cut by a cutting blade disposed opposite to the endless belt. At the timing calculated from the rotation length of the drive roll and the rotation amount of the drive roll, the position of the edge is detected for each turn and the meandering amount is calculated, and based on the meandering amount, the inclination of the axis of the meandering correction roll is calculated. A cutting method characterized in that the meandering is corrected by changing and the end face is cut over the entire circumference of the endless belt by the cutting blade after the amount of meandering falls within a predetermined range.
The cutting blade is arranged so as to be movable in the width direction of the endless belt, and before adjusting the meandering of the traveling endless belt, the width direction of the endless belt is previously cut larger than a predetermined dimension, and then the meandering correction is performed. The cutting method according to claim 1, wherein the cutting is performed and the end surface of the endless belt is recut into a predetermined size.
A belt transport unit that travels by running an endless belt around a plurality of rolls including a driving roll, an edge detection unit that detects the position of an edge of the end face of the traveling endless belt, and a predetermined roll among the plurality of rolls and meandering correction unit for correcting a meandering of a belt which runs by inclining the axial center, and a cutting unit for cutting the end face of the endless belt cutting blade travels is movably disposed opposite to the endless belt After the endless belt is cut to a predetermined size with the cutting blade, the edge detection means evaluates the end face straightness of the endless belt by detecting edge positions at regular intervals over the entire circumference of the endless belt. Endless belt cutting device that makes possible.

The cutting blade of the cutting portion is disposed on a roll that is rotatably fixedly supported, and is engaged with a narrow groove provided on a roll surface fixedly disposed facing the cutting blade, so that the endless belt travels. The cutting device according to claim 4, wherein the end face is cut over the entire circumference.
The predetermined roll of the meandering correction portion is supported in a state in which movement in the width direction of the endless belt is restricted, and is configured to apply tension to the endless belt by its own weight. Cutting device.

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