JP4038703B2 - Switching method for cutting strip sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention selects a cutting method of tangential cutting with a shear cutter and aerial cutting with a leather cutter, and in a cutting apparatus that can cut a traveling strip sheet in the longitudinal direction, the cutting method of the strip sheet is The present invention relates to a method of switching between tangential cutting with a shear cutter and aerial cutting with a leather cutter.
[0002]
[Prior art]
Generally, the cutting device as described above is applied to a sheet split winder or the like. The reason why the cutting device includes the shear cutter for tangential cutting and the leather cutter for air cutting is to make it possible to cut strip sheets of various thicknesses and materials. In addition, the shear cutter and the air-cutting leather cutter are arranged next to each other in order to save space occupied by the cutting device.
[0003]
FIG. 5 is a schematic side view of a conventional cutting device including a shear cutter for tangential cutting and a leather cutter for air cutting. In tangential cutting by the shear cutter 1, leather 3 of the leather cutter 2 for air cutting is a chain line. The belt-like sheet S travels from the guide roller 4 to the guide roller 5 and passes between the upper blade 6 and the lower blade 7 at the cutting position indicated by the chain line in a substantially tangential direction. It is cut by the blade 6 and the lower blade 7. In the aerial cutting with the leather cutter 2, the upper blade 6 retreats to the position indicated by the solid line, and the belt-like sheet S travels from the guide roller 4 to the guide roller 5 as in the case of the tangential cutting with the shear cutter 1, and reaches the cutting position. The leather 3 shown by the solid line is cut without backing.
[0004]
[Problems to be solved by the invention]
However, when the cutting method is switched from tangential cutting by the shear cutter 1 to aerial cutting by the leather cutter 2, the leather 3 is between the lower blade 7 of the shear cutter 1 and the guide roller 5, but the lower blade 7 of the shear cutter 1. Is partially disposed in the width direction of the belt-like sheet so as to correspond to each cutting position, so that the belt-like sheet cannot be reliably backed and the distance between the guide roller 4 and the guide roller 5 is large. The belt-like sheet S is likely to flutter during cutting between the two, so that cutting failure tends to occur. This tendency is particularly strong in a belt-like sheet such as a plastic film that is thin and easily stretched.
[0005]
Therefore, when switching the cutting method from tangential cutting by the shear cutter 1 to air cutting by the leather cutter 2, the lower blade 7 is removed together with the lower blade shaft 8 in order to prevent the belt-like sheet from fluttering by the air cutting by the leather cutter 2, Instead, it is proposed to back up the belt-like sheet by mounting another guide roller. However, in order to replace the lower blade shaft 8 with another guide roller, the lower blade shaft 8 and the guide roller are heavy, and the lower blade shaft 8 is located between the guide roller 4 and the guide roller 5, so that there is a work space. Since it is small and driven, it is connected to the transmission device, so it takes a lot of work to replace the lower blade shaft 8 and another guide roller, and this replacement operation increases the operating rate of the sheet split winder and the like. This can cause a significant decrease.
[0006]
In view of the above-described problems, the present invention makes it possible to easily switch between tangential cutting with a shear cutter and air cutting with a leather cutter in a short time, and cutting a belt-like sheet well in air cutting with a leather cutter. The challenge is to make it possible.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a cutting method of a belt-like sheet by a razor cutter between a lower blade shaft of the shear cutter and a roller adjacent to the lower blade shaft, from tangential cutting by a shear cutter. When switching to aerial cutting, the lower blade shaft is cantilevered, a plurality of cylindrical roller members are attached to the lower blade shaft, and the travel path of the belt-like sheet is moved around the outer periphery of the roller member attached to the lower blade shaft. It changes so that a strip | belt-shaped sheet | seat may wind and drive | work.
[0008]
In the present invention, a guide roller is configured by attaching a plurality of cylindrical roller members to the lower blade shaft, and the lower blade shaft and the cylindrical roller member serve to support the belt-like sheet during traveling, and the cylindrical shape By winding the belt-like sheet around the outer circumference of the roller member and the outer circumference of the roller adjacent to the lower blade shaft, the support interval of the belt-like sheet cut with air is reduced, and the belt-like sheet is placed on the outer circumference of the roller member. Will be held securely. Therefore, when the air is cut with a leather cutter, flapping of the belt-like sheet can be prevented, and the belt-like sheet is difficult to escape from the leather. Therefore, the belt-like sheet can be reliably cut.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic side view of a cutting apparatus for carrying out the present invention. The upper cutter 6 of the shear cutter 1 is attached to an upper cutter shaft 13 that has both ends rotatably supported by a pair of arms 12 fixed to the central shaft 11. In order to change the inclination of the arm 12, the central axis 11 can be rotated by a required rotation angle, so that the retracted position indicated by the solid line and the cutting position indicated by the chain line in FIG. The leather 3 of the leather cutter 2 is, for example, a commercially available razor blade, and is fixedly attached to a blade holder 15 supported by a support shaft 14 parallel to the width direction of the belt-like sheet S. Since the support shaft 14 can be rotated by a required rotation angle in order to change the inclination of the blade holder 15, the cutting position indicated by the solid line and the retracted position indicated by the chain line in FIG.
[0010]
In the case of the cutting device shown in the figure, the guide roller 5 is a grooved roller having a number of circumferential grooves on the outer periphery so that not only the aerial cutting by the leather cutter 1 but also the groove cutting by the leather cutter can be performed. A groove holder for grooving (not shown) for holding the razor blade in the groove of the grooved roller is prepared. A base member 16 having a mounting portion 16a common to the grooving blade holder and the aerial cutting blade holder 15 is slidably mounted on the outer periphery of the support shaft 14. The base member 16 can be fixed to the support shaft 15 at a required position by a bolt 17 with a handle, and the blade holder 15 is fixed to a mounting portion 16 a of the base member 16 by a bolt 18.
[0011]
In FIG. 2, the lower blade shaft 8, the central shaft 12, and the support shaft 14 are supported at both ends by a first machine frame 19 and a second machine frame 20, and the lower blade shaft 8 has one end thereof at the first machine frame 19. It is attached to the bearing device 21 provided in the above and supported so as to be cantilevered. The other end of the lower blade shaft 8 is supported by a shaft end support 22 fixed to the second machine frame 20.
[0012]
As shown in FIG. 3, the second machine frame 20 is provided with a hole 23 having an inner diameter larger than the outer diameter of the lower blade 7 and its cylindrical holder 7 a in the longitudinal direction of the lower blade shaft 8. 8 has a center 24 that is rotatably attached to the lower blade shaft 8. When the shaft end support 22 is fixed to the second machine frame 20 with a bolt 22 a, the center 24 is fixed to the sleeve 25. Hold at the tip.
[0013]
In the above-described cutting apparatus, in order to cut the belt-like sheet S with the shear cutter 1 for tangential cutting, the lower blade 7 is attached to the lower blade shaft 8, and the belt-like sheet S is shown by the chain line in FIG. The guide blade 4 is wound around the guide roller 4, and is further wound around the guide roller 5 through the lower blade 7, and the upper blade 6 is engaged with the lower blade 7 at the cutting position as indicated by the chain line. Cutting with the blade 7.
[0014]
In order to switch the cutting method from tangential cutting by the shear cutter 1 to aerial cutting by the leather cutter 2, the shaft end support 22 shown in FIG. 2 is removed from the second machine casing 20, and the lower blade shaft 8 is cantilevered. The lower blade 7 is removed by removing it from the free end side of the lower blade shaft 8, and instead, a plurality of cylindrical roller members 27 having a predetermined length are attached to the lower blade shaft 8 as shown in FIG. When the lower blade has the same outer diameter as the roller member, the lower blade may be attached to the lower blade shaft 8 together with the roller member 27.
[0015]
In order to attach the roller member 27 to the lower blade shaft 8, the roller member 27 is fitted to the outer periphery of the support shaft 8 from the free end side of the lower blade shaft 8, and when all the roller members 27 have been fitted to the support shaft 8, the positioning collar 28. Is attached to the lower blade shaft 8 and tightened with a lock nut 29 so that the positioning collar 27 does not move. Thereafter, as shown in FIG. 2, the shaft end support 22 is attached to the second machine frame 20 to support the free end side of the lower blade shaft 8.
[0016]
When the attachment of the roller member 27 to the lower blade shaft 8 is completed, the belt-like sheet S is wound around the outer periphery of the roller member 27 as shown by the solid line in FIG. The travel route of the belt-like sheet S is changed so as to travel and the leather 3 is attached to the cutting position indicated by the solid line in FIG.
[0017]
【The invention's effect】
According to the present invention, even if the cutting method of the belt-like sheet is changed to aerial cutting with a leather cutter, the sheet can be prevented from flapping, so that the belt-like sheet can be cut well, and when the cutting method is switched. There is no need to remove the lower blade shaft, and the lower blade and the cylindrical roller member need only be replaced with respect to the lower blade shaft. Can be changed to aerial cutting with a leather cutter.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an example of a cutting device for carrying out the present invention.
FIG. 2 is a schematic plan view of the cutting device shown in FIG.
FIG. 3 is a cross-sectional view of a shaft end support that supports an end portion of a lower blade shaft.
FIG. 4 is a cross-sectional view for explaining a state in which a roller member is attached to a lower blade shaft.
FIG. 5 is a schematic side view according to a conventional cutting device.
[Explanation of symbols]
S belt-like sheet 1 shear cutter 2 leather cutter 3 leather 4 guide roller 5 guide roller 6 upper blade 7 lower blade 8 lower blade shaft 22 shaft end support 23 hole 27 roller member

Claims (1)

When the strip sheet cutting method is switched from tangential cutting by a shear cutter to air cutting by a leather cutter between the lower blade shaft of the shear cutter and a roller adjacent to the lower blade shaft, the lower blade shaft is cut A plurality of cylindrical roller members are attached to the lower blade shaft in the holding state, and the traveling path of the belt-like sheet is changed so that the belt-like sheet travels around the outer periphery of the roller member attached to the lower blade shaft. A strip sheet cutting method switching method characterized by the above.

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