JPH05237836A - Cutting device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a cutting device using an endless cutter, by dressing the abrasive layer chips of the endless cutter during cutting work, the sharpness and cutting accuracy of the endless cutter can be maintained for a long time. Keep it good. [Structure] An endless cutter C having a large number of abrasive grain layer chips 96A on the outer peripheral side end face, a plurality of sprockets 40 for winding and supporting the endless cutter C, and a back plate for pressing and supporting the endless cutter C toward a work material. 50, a cutter drive mechanism 64 for rotating the endless cutter C and the sprocket 40,
Cutting mechanism 32 for moving the endless cutter toward the work material
And. The grindstone supports 114 and 116 are fixed to one end of the back plate 50, and the dressing grindstone 138 is fixed via the elevating member 128 and the driver 136, and is in contact with the abrasive grain layer chip 96A. The dressing grindstone 138 can be moved by the handles 132 and 140 in the cutting direction and the thickness direction of the endless cutter C. A side support roller 126 is attached to the grindstone supports 114 and 116 so as to contact the side surface of the endless cutter C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting various large-sized work materials such as stone, wood, metal, plastic, glass and ceramics.

[0002]

2. Description of the Related Art The present inventor has previously filed Japanese Patent Application No. 1-247767.
No. 4 proposed a cutting device in which the size of the workable material is large, the device size is small, and the cutting accuracy can be improved.

This device is an endless cutter in which a large number of abrasive grain layer chips are fixed at equal intervals on the outer peripheral side end surface of a cutter body in which a large number of flat metal flaps are connected endlessly. , A plurality of sprockets for winding and supporting the endless cutter, and arranged inside the endless cutter along the winding plane, and pressingly supporting a part of the endless cutter toward a work material to be cut. And a cutter driving mechanism for rotating the endless cutter and the sprocket, and a cutting mechanism for cutting the endless cutter into the work material along the winding plane.

[0004]

By the way, in the above cutting device, since the cutting depth is not regulated and continuous cutting is easy for a long time, the advantages thereof can be maximized. It is important to prevent clogging of the abrasive grain layer chips during cutting as much as possible and prevent the deterioration of the grinding speed and the grinding accuracy due to the deterioration of the sharpness of the endless cutter.

The present invention has been made in view of the above circumstances, and in the cutting device using the above-mentioned endless cutter, dressing (sharpening) of the abrasive layer chip of the endless cutter is performed even during the cutting operation. An object of the present invention is to provide a cutting device capable of maintaining the sharpness of an endless cutter for a long period of time.

[0006]

A cutting device according to the present invention is provided with a grindstone support near a portion of an endless cutter supported by a backplate, for example, at an end of the backplate. A dressing grindstone whose outer peripheral surface can be brought into contact with the grinding surface of the abrasive grain chip is provided rotatably around an axis, and a drive mechanism for rotating the dressing grindstone is provided.

[0007] The dressing grindstone has the axial direction moving mechanism for displacing the dressing grindstone in the axial direction thereof and the cutting direction moving mechanism for displacing the dressing grindstone in the cutting direction of the endless cutter. It may be supported by a whetstone support. Further, a driver for operating each of the axial direction moving mechanism and the cutting direction moving mechanism to move the dressing grindstone in each of the directions, and a control mechanism for controlling each of these drivers may be further provided.

Further, the grindstone support is provided with a pair of side surface support rollers whose outer peripheral surfaces are in contact with both side surfaces of the cutter body of the endless cutter and which are rotatable as the endless cutter travels. May be.

[0009]

In the cutting device of the present invention, the endless cutter is run to cut the work piece by the abrasive layer chip, and the dressing grindstone brought into contact with the end face of the abrasive layer chip is used as the endless cutter. By rotating in the opposite direction to the running direction and dressing the abrasive layer chips, the sharpness of the abrasive layer chips is always kept good, and good grinding accuracy and speed are maintained for a long time. be able to.

[0010]

Embodiments of the cutting device according to the present invention will be described in detail below. 1 and 2 are a front view and a sectional view taken along line II-II showing a first embodiment of a cutting device according to the present invention, and the up, down, left and right used in the following description are based on FIG.

In the figure, reference numeral 1 is a pair of columns standing on the floor F, and guide rails 2 are provided on the front faces of these columns 1, respectively.
Is fixed vertically. As shown in FIG. 2, a pair of guide grooves 4 are vertically formed on both side surfaces of the guide rails 2 over the entire length.

As shown in FIG. 2, on the front surface of each guide rail 2, base plates 12 are arranged at the same height. These base plates 12 have a pair of locking claws 14 on the back surface, and these locking claws 14 are fitted into the guide grooves 4,
Each base plate 12 can be moved up and down along the guide rail 2.

A recess 8 extending in the vertical direction is formed on the front surface of the guide rail 2, and a screw shaft 10 is disposed in the recess 8 in the vertical direction, and the lower end of the screw shaft 10 is supported by a bearing 6. Each base plate 12 is attached to the screw shaft 10 via a female screw member 16, respectively.

A top plate 26 is horizontally laid over the upper ends of the columns 1, and the upper ends of the screw shafts 10 are connected to a pair of gear boxes 28 fixed on the top plates 26. The gear boxes 28 are connected to each other via a horizontal rod 30, and a lifting motor 32 fixed to the top plate 26.
It is connected to the. When the lift motor 32 is operated, each screw shaft 10 rotates in the same direction via the gear box 28, and each base plate 12 moves up and down while maintaining the same height.

One end of each wire 18 is fixed to each base plate 12, and these wires 18 are extended upward to form a top plate 26.
It is wound on a pulley 20 provided above and is lowered along the support column 1, and a balance weight 22 is fixed to the lower end thereof. Each of the balance weights 22 is supported by a guide member 24 so as to be capable of moving up and down, and is balanced with the lifting portion including the base plate 12.

The shaft support 3 is provided on the front surface of the right base plate 12.
4, the mounting groove 36 formed on the back surface of the shaft support 34 is fitted to a horizontal guide portion 44 provided on the front surface of the base plate 12, and is displaceable in the left-right direction along the guide portion 44. It can be fixed at any position. Thus, the endless cutter C can be mounted between the sprockets 40 and the tension thereof can be adjusted.

The shaft support 34 has a rotating shaft 3 protruding forward.
8 is rotatably attached, and a sprocket 40 is vertically fixed to the rotary shaft 38. Sprocket 4
A cutter groove 42 perpendicular to the outer peripheral surface is formed on the outer peripheral surface of 0, and an endless cutter C is fitted therein. In the cutter groove 42, a large number of pins 40A are arranged at equal intervals in the circumferential direction as shown in FIG.
A engages with the inner peripheral edge of the endless cutter C to prevent the cutter C from idling.

A plate support 46 is disposed adjacent to the left side of the shaft support 34 as shown in FIG.
Is slidably mounted along the. The plate support 46 is connected to a plate tensioning mechanism (not shown), and the plate tensioning mechanism is connected to the plate support 46.
To the right to exert a tension on the back plate 50. The left end portion of the plate support 46 projects to the winding plane of the endless cutter C, and the right end of the back plate 50 is sandwiched by the fixing plate 48 and fixed to the front end surface by the bolt 49. On both upper and lower edges of the back plate 50, guide grooves 51 having a V-shaped cross section are formed over the entire length.

On the other hand, the plate support 52 is directly fixed to the left base plate 12, and the left end of the back plate 50 is fixed to the front end of the plate support 52 by the fixing plate 48 and the bolt 49 as described above. ing. A rotary shaft 56 is rotatably attached to the left base plate 12 at the same height as the rotary shaft 38, and a pulley 58 and a sprocket 40 are coaxially fixed to the rotary shaft 56. The endless cutter C is wound around the grooves 42 of both sprockets 40.

A drive motor 64 (cutter drive mechanism) is fixed to the side surface of the left base plate 12, and a pulley 62 is fixed to the rotary shaft of the motor 64. The belt 60 is wound between the pulley 62 and the pulley 58, and the drive motor 6
By operating No. 4, each sprocket 40 rotates and the endless cutter C runs.

FIG. 3 is a partial front view showing an example of the endless cutter C. This endless cutter C has a large number of plate-like flaps 90 having a constant thickness connected endlessly. Each of the flaps 90 of this embodiment has a rectangular shape as shown in FIG. 3, one end of which has a semicircular connecting projection 92 and the other end of which has a semicircular shape complementary to the connecting projection 92. Notch for connection 94
Are formed respectively. The connecting projections 92 of the respective flaps 90 are fitted into the connecting cutouts 94 of the adjacent flaps 90, and all the flaps 90 are rotatably connected in the cutter winding plane.

A concave portion 100 is formed at an end portion of each flap 90 on the outer peripheral side of the cutter, and a convex portion 98 of an abrasive grain layer segment 96 (abrasive grain layer chip) having an abrasive grain layer 96A is fitted therein to form an abrasive grain. The layer segment 96 is fixed. A slit 102 is formed in the recess 100, and the slit 1
02 is opened with a tool not shown, the abrasive layer segment 96
Can be attached and detached.

A guide protrusion 104 having a V-shaped cross section is formed at an end of each flap 90 on the inner peripheral side of the cutter, and is fitted in a guide groove 51 formed along the upper and lower edges of the back plate 50. There is. Further, arc-shaped drive recesses 106 are formed at both ends of the inner peripheral side end of each flap 90, and the drive recesses 106 forming a pair of adjacent flaps 90.
When wound around each sprocket 40, the pin sandwiches the individual pin 40A fixed in the groove 42 of the sprocket 40.

Further, at both ends of each flap 90 on the outer peripheral side of the cutter, engaging protrusions 108 are formed on one side and engaging recesses 110 on the other side, so that the flaps 90 adjacent to each other in the straight portion of the endless cutter are formed. The engaging convex portion 108 and the engaging concave portion 110 engage with the flap 90 in an irremovable manner in the thickness direction.

The back plate 50 is a rectangular plate having the same thickness as the flap 90, and the vertical width thereof is an endless cutter C wound between the sprockets 40.
Is approximately equal to the vertical separation distance of the parallel portion, and its horizontal width is slightly smaller than the horizontal separation distance of each sprocket 40.

The material of the back plate 50 is not limited, but from the viewpoint of wear resistance, SUP steel, SNCM steel, SKD.
Steel, SK steel, stainless steel, etc. are suitable. Further, the back plate 50 may be configured by joining a plurality of plate materials in a multilayer shape. In particular, the back plate 50 is formed by joining three plate materials to form the back plate 50, and molding the plate materials on both sides with the above-mentioned material, while molding the central plate material with bronze, copper, steel plate, etc. which are softer than that. The damping effect of is obtained.
Further, even if a vibration damping plate having a resin film sandwiched between a pair of metal plates is used, a good vibration damping effect can be obtained, and noise during cutting work can be reduced.

Next, the dressing mechanism of the endless cutter C, which is the main feature of the present invention, will be described. As shown in FIG. 1, a plurality of rows of through holes 112 extending vertically are formed in the end portion (left end portion in this example) of the back plate 50 on the downstream side in the traveling direction of the cutting portion of the endless cutter C. The heights of the through holes 112 lined up with are the same. Further, the through hole 1 is provided at the left end of the back plate 50.
A pair of grindstone supports 11 facing one of the rows 12
4, 116 are vertically arranged with the back plate 50 interposed therebetween.

A plurality of through holes corresponding to one row of the through holes 112 are formed in each of the grindstone supports 114 and 116, and these through holes and any row of the through holes 112 are respectively formed. The bolt 118 is passed through and fastened with a nut (not shown).

As shown in FIGS. 4 and 5, the lower ends of the grindstone supports 114 and 116 are substantially back plates 5.
Dovetail grooves 120 that reach the lower end of 0 and extend in the direction orthogonal to the back plate 50 are formed on the respective lower end surfaces. A slide member 122 is fitted in the dovetail groove 120 so as to be movable along the dovetail groove 120, and can be fixed at an arbitrary position by a bolt (not shown). A roller shaft 124 is attached downward to each slide member 122, and a side surface support roller 126 is coaxially and rotatably attached to each roller shaft 122 so as to be symmetrical to both side surfaces of the flap 90 of the endless cutter C. Abutting.

The side support roller 126 includes bearings 126A,
Inner peripheral portion 126B and outer peripheral portion 126 made of a hard material
An elastic body such as various rubbers, Delrin (trade name) having a high elastic modulus, and plastics such as nylon is preferable as the material of the outer peripheral portion 126C. However, the outer peripheral portion 126C may be formed of a hard material if necessary.

On the side surface of the grindstone support 116, a vertically elevating member 128 is arranged. This lifting member 128
A slide groove 130 extending vertically is formed in the groove, and a convex portion formed on a side surface of the grindstone support 116 is fitted in the slide groove 130 so as to be vertically movable. A handle (cutting direction moving mechanism) 1 is provided on the upper end of the grindstone support 116.
32 is provided, and by rotating the handle 132, the elevating member 128 can be raised and lowered steplessly and can be fixed at an arbitrary position.

A slide groove 134 extending in a direction orthogonal to the back plate 50 is formed on the lower end surface of the elevating member 128, and the upper end convex portion of a driver 136 having a built-in motor is formed in the slide groove 134. Is movably fitted along. A handle (axial direction moving mechanism) 140 is provided at the lower end of the elevating member 128, and the driver 136 is rotated by rotating the handle 140.
Can be moved toward and away from the back plate 50 and can be fixed at an arbitrary position.

The driver 136 has a rotary shaft 136A protruding in a direction orthogonal to the plane of the back plate 50, and the rotary shaft 136A has a wheel-type dressing grindstone 1.
38 is fixed coaxially. This dressing wheel 1
38 is a super abrasive grain such as diamond or CBN or Si
It is formed by dispersing general abrasive grains such as C and Al ₂ O ₃ in a metal bond, a resin bond, or a vitrified bond, and can be dressed not only on the outer peripheral surface but also on both side surfaces. Dressing wheel 13
The abrasive grain size, concentration, and bond type of No. 8 are determined according to the characteristics of the abrasive grain chip 96A to be dressed.

The elevating member 128 and the driver 136
4 is set so that each side surface of the dressing grindstone 138 can be brought into contact with each side surface of the abrasive grain layer chip 96A as shown by the chain double-dashed line in FIG. This makes it possible to dress not only the lower end surface of the abrasive grain layer chip 96A but also both side surfaces thereof.

The structure for supporting the work material will be described. As shown in FIG. 1, a pair of rails 70 and 72 are laid in the front-rear direction on the floor surface F between the columns 1. , A truck 74 is placed on these rails 70, 72,
A plurality of pairs of wheels 76 and 78 of this dolly 74 are connected to the rail 70,
It is designed to run along 72, and a horizontal work table 80 is fixed to the upper surface of the carriage 74.

In order to perform cutting with the endless cutter C using the above apparatus, first, the elevating motor 32 is operated to raise each base plate 12 and the endless cutter C, and then the stone material etc. placed on the table 80. Position the work material in the front-back direction. Next, the plate tensioning mechanism is operated to apply an appropriate tension to the back plate 50, and if the tension of the endless cutter C is insufficient, the shaft support 34 is moved to adjust the tension.

The position of the grindstone support 114 is adjusted in accordance with the size of the work material, and further the position of the slide member 122 is adjusted so that the side support rollers 126 are flapped 90 with equal pressure.
Abut. When the adjustment is completed, the drive motor 64 is operated to drive the endless cutter C, and the lifting motor 32 is operated to lower the endless cutter C at a desired cutting speed to cut the work material.

When the sharpness of the abrasive grain chip 96A eventually deteriorates, the motor of the drive unit 136 is energized to rotate the dressing grindstone 138 in the direction opposite to the traveling direction of the endless cutter C, while operating the handles 132 and 140. Then, the dressing grindstone 138 is brought into contact with the lower end surface (ground surface) of the abrasive layer chip 96A. Then, the bonded phase exposed on the lower end surface of the abrasive grain layer chip 96A is scraped by the dressing grindstone 138 rotating relatively in the opposite direction, and a large number of buried superabrasive grains are projected to restore the sharpness.

Since the work of cutting the work material can be continued as it is during the dressing, if the dressing is performed at appropriate intervals, the cutting work can be continued for a long time while maintaining good sharpness. In addition to intermittent dressing, dressing wheel 1 is always used during cutting work
38 may be brought into contact with the abrasive grain layer chip 96A to continue light dressing, or when the endless cutter C is a new one, it is naturally possible to perform dressing without cutting the work material. It is possible.

Further, in this device, the handles 132, 1
By operating 40, the dressing grindstone 138 can be brought into contact with any side surface of the abrasive layer chip 96A, and each side surface of the abrasive layer chip 96A can be dressed. By appropriately performing the dressing of the lower end surface and both side surfaces of the abrasive grain chip 96A in this manner, not only the grinding efficiency is improved, but also the cutting direction of the endless cutter C is stabilized and the flatness of the cut surface after cutting is improved. Can be improved. This is especially important when cutting out a large stone slab
This is a very important effect that greatly affects the quality of the stone plate.

Further, in this apparatus, since the side surface of the endless cutter C is regulated by the pair of side surface supporting rollers 126, the side surface supporting rollers 126 suppress the vibration of the endless cutter C in the thickness direction, and the dressing is performed. Whetstone 138
The contact state between the abrasive grain layer chip 96A and the abrasive grain layer chip 96A can be stably maintained, the dressing accuracy can be improved, and the side surface support roller 126 prevents the endless cutter C from swinging, thereby flattening the cut surface of the work material. A degree improvement effect can also be obtained. In particular, vibration is likely to occur in the endless cutter C at the start of cutting into each work material, but in this device, since the side support rollers 126 prevent vibration, there is an advantage that the shape of the corner portion of the cut surface of the work material is less likely to collapse. Have.

Further, since the vibration of the endless cutter C is suppressed, the vibration of the back plate 50 can be reduced, so that the noise amount from the back plate 50 can be reduced and the working environment can be improved.

The present invention is not limited to the above-described embodiment, and for example, instead of the handles 132 and 140, the elevating driver for elevating the elevating member 128 and the driver 136 are moved horizontally. It is also possible to provide a horizontal driver for the above, and further to provide a control mechanism for NC controlling the operations of the lifting driver and the horizontal driver. In this case, the dressing work as described above can be completely automated, and by causing the dressing grindstone 138 to reciprocate in the axial direction during dressing, uneven wear of the dressing grindstone 138 (depression, etc.) is prevented, The outer peripheral surface shape of the abrasive grain layer chip 96A can be maintained with high accuracy.

The embodiment shown in FIG. 6 has a back plate 50.
The upper and lower widths of the back plate 50 are made smaller so that only the lower end edge thereof engages with the lower inner peripheral edge of the endless cutter C, and both end portions of the back plate 50 are extended to form a triangular protrusion 142.
And an example in which a guide groove 51 (or a guide ridge) that engages with the endless cutter C is also formed at the lower end of the overhang portion 142. According to this example, the sprocket 4
The supported area of the flap 90 can be extended to the vicinity of the winding portion to 0, and the back plate 50 to the sprocket 40 and the sprocket 40 to the back plate 5 can be extended.
The introduction of the flap 90 to 0 becomes smooth.

The endless cutter C used in the cutting apparatus of the present invention is not limited to the one shown in FIG. 3, and the endless cutter C as shown in FIGS. 7 to 9 can also be used. The endless cutter C shown in FIGS. 7 and 8 is a metal strip 1 having a rectangular cross section.
50 are welded and connected endlessly (reference numeral 152 indicates a welded portion), and the end edge on the outer peripheral side of the endless metal strip 150 is
A large number of abrasive grain layer segments 156 are fixed at regular intervals. Reference numeral 154 is a guide protrusion that engages with the guide groove 51 on the edge of the back plate 50.

The abrasive grain layer segment 156 includes the abrasive grain layer chip 156A which is a metal bond abrasive grain layer and the metal supporting portion 1.
56B is integrally molded with both ends 16 of the support portion 156B.
Only 0 is welded to the metal strip 150, and the supporting portion 156B
A slit 158 is formed in the central portion of the. The slit 158 facilitates the deformation of the metal strip 150.

The endless cutter C shown in FIG. 9 has a large number of slits 16 extending in the longitudinal direction in the metal strip 150 of the example of FIG.
2 is formed to make the deformation of the metal strip 150 easier. In this example, the slit 162 also provides a vibration damping effect. In addition to the above, for example, a plurality of metal strips having a rectangular cross section are joined to form an endless belt similar to that shown in FIG. It can be used.

In addition, according to the present invention, the endless cutter may be wound around three or more sprockets arranged in the same plane for running, and the side support roller 126 may be provided on the grindstone support. Also, a pair of side surface support rollers is attached to the other end side of the back plate 50 having no structure or a dressing mechanism, similarly to the side surface support roller 126, via a support body, and vibration when the endless cutter C is cut is cut. Can be further reduced.

[0049]

As described above, in the cutting apparatus of the present invention, the endless cutter is made to travel to cut the work material by the abrasive grain layer tip, and is brought into contact with the end surface of the abrasive grain layer tip. By rotating the dressing grindstone in the direction opposite to the running direction of the endless cutter and dressing the abrasive layer chips, the sharpness of the abrasive layer chips is always maintained at a good level for a long time. Good grinding accuracy and grinding speed can be maintained.

When the dressing grindstone is attached to the grindstone support through the axial movement mechanism and the cutting direction movement mechanism, the position of the dressing grindstone can be changed even when the dimension of the endless cutter changes. It can be easily dealt with by adjusting.

Further, when a driving device for moving the dressing grindstone in each direction and a control mechanism for controlling these driving devices are provided, not only can the dressing work be completely automated, By reciprocally moving the dressing grindstone in the axial direction, uneven wear of the dressing grindstone can be prevented, and the dressing shape of the abrasive layer chip can be maintained with high accuracy.

Further, in the case where the grindstone support is provided with a pair of side surface support rollers which rotate by contacting both side surfaces of the endless cutter, the side surface support rollers suppress the vibration of the endless cutter in the thickness direction. Thus, the contact state between the dressing grindstone and the abrasive grain chip can be stably maintained, the dressing accuracy can be improved, and the flatness of the cut surface can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cutting device according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view showing essential parts of an endless cutter and a sprocket of the device.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view showing a dressing grindstone and a side surface supporting roller of the apparatus.

FIG. 6 is a front view showing a main part of another embodiment of the present invention.

FIG. 7 is a partial front view of an endless cutter according to another embodiment of the present invention.

FIG. 8 is a vertical sectional view of the endless cutter.

9 is a partial front view showing a modified example of the endless cutter shown in FIG. 7. FIG.

[Explanation of symbols]

 C Endless cutter 32 Cutter lifting motor (cutting mechanism) 40 Sprocket 50 Back plate 51 Guide groove 64 Drive motor (cutter driving mechanism) 90 Flap 96A Abrasive layer tip 114,116 Grindstone support 124,126 Side support roller 128 Lifting member 132 Lifting handle (cutting direction moving mechanism) 136 Driver 138 Dressing grindstone 140 Horizontal handle (axial moving mechanism)

Claims (4)

[Claims] 1. An endless cutter in which a large number of abrasive grain chips are provided on an end face on the outer peripheral side of a cutter body which is endless and has a flat band shape along the winding plane, and the endless cutter is wound and supported. A plurality of sprockets, a back plate that is arranged inside the endless cutter along the winding plane, and presses and supports a part of the endless cutter toward a work material by one end edge thereof, and an endless cutter. And a cutter drive mechanism for rotating the sprocket, and a cutting mechanism for moving at least one of the work material and the endless cutter to the other side along the winding plane, wherein the endless A grindstone support is provided in the vicinity of the supported portion of the cutter by the back plate, and a dressing grindstone whose outer peripheral surface is brought into contact with the grinding surface of the abrasive layer chip is provided on the grindstone support. A cutting device characterized by being provided so as to be rotatable around a line and provided with a drive mechanism for rotating the dressing grindstone. 2. The dressing grindstone is provided with an axial moving mechanism for displacing the dressing grindstone in an axial direction thereof, and a cutting direction moving mechanism for displacing the dressing grindstone in a cutting direction of an endless cutter. The cutting device according to claim 1, wherein the cutting device is supported by a grindstone support. 3. A drive unit for actuating each of the axial direction moving mechanism and the cutting direction moving mechanism to move the dressing grindstone in each direction, and a control mechanism for controlling each of the driving units. The cutting device according to claim 2, wherein the cutting device is a cutting device. 4. The grindstone support is provided with a pair of side support rollers whose outer peripheral surfaces are in contact with both side surfaces of the cutter body of the endless cutter, and which are rotatable as the endless cutter travels. The cutting device according to claim 1, 2 or 3, characterized in that.