Cutting machine

Abstract

Provided is a cutting machine with which it is possible to perform one round of cutting on an object to be cut in a short time even if the thickness of the object to be cut is great. In a cutting machine 1, a rotary blade 7 is fixed to a rotary part 4 in a first radial direction. The rotary blade 7 cuts an object to be cut 300 by passing a fixed blade 11 in the normal rotation direction R1 as viewed from a non-transport direction. A blade tip 7a of the rotary blade 7 is formed so as to project farther outward than the rotary part 4. As viewed from the first radial direction, the blade tip 7a of the rotary blade 7 is inclined so that a one-direction-side end part in the extension direction of the blade tip 7a with respect to the rotary shaft is separated from the other-direction-side end part in the extension direction of the blade tip 7a, and as viewed from a second radial direction orthogonal to the first radial direction, the blade tip 7a of the rotary blade 7 is inclined so that the other-direction-side end part is separated from the one-direction-side end part with respect to the rotary shaft, the rotary blade 7 being fixed to the rotary part 4.

Description

cutting machine

[0001] The present invention relates to a cutting machine.

[0002] In a cutting machine, a workpiece is conveyed in a conveyance direction and cuts the workpiece with a blade that is longer than the width of the workpiece. The blade generally moves back and forth vertically relative to the workpiece (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2018-24057

[0004] Incidentally, when a cutting target, such as a raw material, is cut by a cutting machine, the weight of the cut portion may be within a predetermined range, and high cutting accuracy, such as deformation and smoothness of the cut surface, may not be required. Furthermore, when a large amount of a cutting target, such as a raw material, is used during processing, it is necessary to prepare many cut portions in a short time, and therefore it may be required to complete one cut in a short time. Among cutting machines, those in which the blade trajectory moves back and forth in an up-and-down direction change the cutting speed depending on the thickness of the cutting target, i.e., the thicker the cutting target, the longer it takes to cut.

[0005] The present invention has been made in consideration of the above, and aims to provide a cutting machine that can perform a single cut on an object to be cut in a short time, even if the object to be cut is thick.

[0006] In order to solve the above-mentioned problems and achieve the object, the cutting machine in this embodiment comprises a table on which an object to be cut is placed, a fixed blade arranged on the conveying direction side of the object to be cut relative to the table, a rotating unit arranged on the conveying direction side and spaced apart from the fixed blade, a rotation mechanism that rotates the rotating unit around a rotation axis that is parallel to a width direction perpendicular to the conveying direction, and a rotating blade that is fixed to the rotating unit in a first radial direction that is a direction in which the rotating unit is fixed, and that cuts the object to be cut by passing through the fixed blade in the rotational direction when viewed from a non-conveying direction that is the opposite direction to the conveying direction, The rotary blade is flat and extends in the extension direction, and a cutting edge is formed at the end portion on the tip side, which is one of the directions perpendicular to the extension direction, and the cutting edge protrudes outward from the rotating part.When viewed from a first radial direction, the rotary blade is inclined so that the end portion on one side in the extension direction of the cutting edge is farther away from the rotation axis than the end portion on the other side in the extension direction of the cutting edge, and when viewed from a second radial direction perpendicular to the first radial direction, the cutting edge is inclined so that the end portion on the other side is farther away from the rotation axis than the end portion on the one side.The rotary blade is fixed to the rotating part.

[0007] The cutting machine of the present invention has the effect of being able to perform a single cut on an object to be cut in a short time even if the object to be cut is thick.

[0008] FIG. 1 is a perspective view of a cutting machine according to an embodiment. FIG. 2 is a perspective view of a cutting machine according to an embodiment. FIG. 3 is a cross-sectional view of a main part of a cutting machine according to an embodiment. FIG. 4 is a plan view of a main part of a cutting machine according to an embodiment when viewed from a first radial direction. FIG. 5 is a front view of a main part of a cutting machine according to an embodiment when viewed from a second radial direction. FIG. 6 is an exploded perspective view of a blade holder and the like according to an embodiment. FIG. 7 is an explanatory diagram of the cutting operation of a cutting machine according to an embodiment. FIG. 8 is an explanatory diagram of the cutting operation of a cutting machine according to an embodiment. FIG. 9 is a perspective view showing a modified example of a cutting machine.

[0009] The present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to the following embodiments. Furthermore, the components in the following embodiments include those that can be easily imagined by a person skilled in the art or those that are substantially the same.

[0010] [Embodiment] Fig. 1 is a perspective view of a cutting machine according to an embodiment. Fig. 2 is a perspective view of a cutting machine according to an embodiment. Fig. 3 is a cross-sectional view of a main portion of the cutting machine according to an embodiment. Fig. 4 is a plan view of a main portion of the cutting machine according to an embodiment when viewed from a first radial direction. Fig. 5 is a front view of a main portion of the cutting machine according to an embodiment when viewed from a second radial direction. Fig. 6 is an exploded perspective view of a blade holder and the like according to an embodiment. In addition, the X direction in each figure (including Figs. 7 to 9) is the depth direction of the cutting machine, the Y direction in each figure is perpendicular to the X direction and is the width direction of the cutting machine, and the Z direction in each figure is perpendicular to the X direction and the Y direction and is the up-down direction of the cutting machine. X1 is the conveying direction, X2 is the non-conveying direction, Y1 is the right direction, Y2 is the left direction, Z1 is the up direction, and Z2 is the down direction. Note that Figure 3 (including Figures 7 and 8) is a cross-sectional view of the rotating parts, etc. cut along a plane including the depth direction and the up-down direction, Figure 4 is a view of the rotating parts, etc. viewed from above, and Figure 5 is a view of the rotating parts, etc. viewed from the non-conveying direction.

[0011] As shown in FIG. 1 , the cutting machine 1 cuts a cutting object 300 and includes a base 2, a table 3, a rotating unit 4, a rotation mechanism 5, a blade holder 6, a rotary blade 7, a blade holder fixing bolt 8, a blade holder position adjustment mechanism 9, a fixed blade unit 10, a fixed blade 11, and an operation control unit 12. Here, the cutting object 300 is preferably one in which the weight and volume of the cut portion 310 fall within a predetermined range are prioritized over cutting accuracy, such as deformation and smoothness of the cut surface of the cut portion 310 (described below). Specifically, the cutting object 300 is a material formed into a strip or rectangle before processing, such as a rubber material before vulcanization or a plastic material before molding. Furthermore, the cutting object 300 is preferably thick, with a thickness of several centimeters to several tens of centimeters being preferred, and a thickness of 30 mm to 250 mm being even more preferred. The thickness may be thicker than the thickness of each of the objects to be cut 300 alone due to the objects to be cut 300 being stacked on top of one another.

[0012] The base 2 is installed on the floor of a facility such as a factory, and other components of the cutting machine 1 are arranged inside or above it. The base 2 is formed in a box shape using multiple frame materials and multiple panel materials. The base 2 includes support members 21, 22, and 23 and bearing members 24 and 25. The support members 21, 22, and 23 are fixed to the other components of the base 2. The support member 21 is formed to extend in the width direction. The support members 22 and 23 are respectively arranged on both ends of the support member 21 in the width direction, in the conveying direction. The support members 21, 22, and 23 are formed in a U-shape when viewed from the top and bottom. The bearing members 24 and 25 rotatably support the rotating unit 4 and are fixed to the upper sides of the support members 22 and 23, respectively. The bearing members 24 and 25 are arranged spaced apart from the base 2 in the width direction. Furthermore, the base 2 is formed with an unloading opening 2a, as shown in FIG. 2 . The carry-out port 2 a is formed on the lower side of the side surface of the base 2 in the transport direction, and communicates with an opening 2 b formed by the support members 21 , 22 , and 23 .

[0013] As shown in FIG. 1 , the table 3 is provided with a cutting object 300 placed thereon and is disposed above the base 2. A cutting object placement surface 3a is formed on the table 3 at its upper side. The cutting object placement surface 3a is flat and has a width greater than the maximum width of the cutting objects 300 set as the cutting objects 300 for the cutting machine 1. The table 3 has a plurality of ball casters 31. Each ball caster 31 has a ball and a ball support member that rotatably supports the ball. The plurality of ball casters 31 correspond to a plurality of holes formed in the cutting object placement surface 3a, respectively, and are fixed to the table 3 with the balls protruding above the cutting object placement surface 3a. As a result, the portion of the cutting object 300 facing the cutting object placement surface 3a in the up-down direction is supported by the plurality of ball casters 31, allowing the cutting object 300 to be easily moved in the conveyance direction relative to the table 3.

[0014] As shown in FIGS. 1 to 5 , the rotating unit 4 rotates about a rotation axis O parallel to the width direction, thereby rotating the rotary blade 7 fixed to the rotating unit 4 about the rotation axis O. The rotating unit 4 is disposed apart from the table 3 in the conveying direction. The rotating unit 4 has a rotating main body 41 and two shafts 42 and 43. The rotating main body 41 fixes the rotary blade 7 and is made of a single metal member. The rotating main body 41 is rotatable about the rotation axis O, rotating in a forward rotation direction R1 and a reverse rotation direction R2. Blade holder mounting surfaces 41a and 41b on which the blade holder 6 is mounted are formed on the radially outer side, i.e., the outer peripheral surface, of the rotating main body 41. The blade holder mounting surfaces 41a and 41b are disposed opposite each other in the radial direction, and the blade holder 6 and the rotary blade 7 correspond to the blade holder 6 and the rotary blade 7, respectively. That is, in this embodiment, two rotary blades 7 are fixed to the rotating unit 4, and the two rotary blades 7 are arranged at equal intervals in the forward rotation direction R1 (reverse rotation direction R2) relative to the rotating unit 4. The blade holder mounting surfaces 41a, 41b are flat and are inclined so that the other end in the width direction is farther away from the rotation axis O than the one end when viewed from a second radial direction perpendicular to the first radial direction, which is the direction in which the rotary blades 7 are fixed to the rotating unit 4. For example, when the second radial direction is parallel to the depth direction, as shown in FIG. 5 , the blade holder mounting surfaces 41a, 41b are inclined so that the upper end moves farther away from the rotation axis O toward the right when viewed from the non-conveying direction. Furthermore, the blade holder mounting surfaces 41a, 41b are formed to extend in the tangential direction of the rotating unit 4 when viewed from the width direction. Fixing holes 41c corresponding to the blade holder fixing bolts 8 are formed in the blade holder mounting surfaces 41a, 41b. A plurality of fixing holes 41c (nine in this embodiment) are formed on each blade holder mounting surface 41a, 41b at equal intervals in the width direction. When viewed from the first radial direction, the fixing holes 41c are formed at an incline so that the fixing holes 41c on one side in the width direction with respect to the rotation axis O are farther apart than the fixing holes 41c on the other side. For example, when the first radial direction is parallel to the up-down direction, as shown in FIG. 4, the fixing holes 41c are formed at an incline so that they are farther apart in the non-conveyance direction as they move leftward with respect to the rotation axis O when viewed from above.The blade holder mounting surfaces 41a, 41b are formed with fixing holes 41d corresponding to the holding member fixing bolts 92 (described later). A plurality of fixing holes 41d (three in this embodiment) are formed on each blade holder mounting surface 41a, 41b at equal intervals in the width direction. The fixing holes 41d are formed closer to the reverse rotation direction R2 than the fixing holes 41c. When viewed from the first radial direction, the fixing holes 41d are formed at an inclination such that the fixing holes 41d on one side in the width direction relative to the rotation axis O are farther apart than the fixing holes 41d on the other side. For example, when the first radial direction is parallel to the up-down direction, as shown in FIG. 4, the fixing holes 41d are formed at an inclination such that they move farther apart in the non-conveying direction as they move leftward relative to the rotation axis O when viewed from above. The inclination direction of the fixing holes 41d is set parallel to the inclination direction of the fixing holes 41c. The two shafts 42, 43 support the rotating main body 41, protrude in the width direction from both widthwise ends of the rotating main body 41, and are fixed to the rotating main body 41. The two shafts 42, 43 are supported by bearing members 24, 25, respectively, so as to be rotatable about a rotation axis O. This allows the rotating unit 4 to rotate about the rotation axis O on the upper side of the support members 21, 22, 23. Here, the forward rotation direction R1 is the direction in which the rotating unit 4 rotates downward when viewed from the non-conveying direction, and the reverse rotation direction R2 is the direction in which the rotating unit 4 rotates upward when viewed from the non-conveying direction side.

[0015] As shown in FIGS. 1 and 2 , the rotation mechanism 5 rotates the rotating unit 4 around the rotation axis O. Although not shown, the rotation mechanism 5 includes a servo motor, a reduction mechanism, and a transmission mechanism. The servo motor is an actuator that generates a rotational driving force and performs rotational motion using power supplied from outside the cutting machine 1. The reduction mechanism reduces the rotational speed of the servo motor and increases the rotational torque. The input side of the reduction mechanism is connected to the rotation shaft of the servo motor and the output side is connected to the input side of the transmission mechanism. The transmission mechanism transmits the increased rotational driving force to the rotating unit 4 due to the reduction in the rotational speed by the reduction mechanism. For example, the transmission mechanism includes an input gear, an output gear, and a chain. The input gear is connected to the output side of the reduction mechanism. The output gear has a larger gear diameter than the input gear and is connected to the rotating unit 4, i.e., the shaft 43 in this embodiment. The chain is wound around the input gear and the output gear.

[0016] As shown in FIGS. 3 to 6 , the blade holder 6 detachably holds the rotary blade 7. In this embodiment, two blade holders 6 are provided for the rotating unit 4. The two blade holders 6 are mounted on the blade holder mounting surfaces 41 a, 41 b, respectively, and are fixed in a first radial direction, which is the direction in which the blade holder 7 is fixed to the rotating unit 4. The blade holder 6 is flat and extends in the extension direction, and has multiple through holes 6 a formed therein. The multiple through holes 6 a (nine in this embodiment) are formed in the blade holder 6 at equal intervals in the extension direction. The through holes 6 a are holes into which blade holder fixing bolts 8 are inserted, and are formed as elongated holes that are long in the orthogonal direction perpendicular to the extension direction. The through holes 6 a are formed in the thickness direction (first half direction) perpendicular to the extension direction and the orthogonal direction, and have a step formed midway. Because the through hole 6a of the blade holder 6 is formed in an elongated hole shape, when the blade holder 6 is fixed to the rotating unit 4 by the blade holder fixing bolt 8, it can move within a predetermined range in the direction perpendicular to the rotating unit 4. The blade holder 6 has a mounting target surface 6b that comes into contact with the blade holder mounting surfaces 41a, 41b when mounted on the blade holder mounting surfaces 41a, 41b. The mounting target surface 6b has a notch 6c formed at its end toward the tip direction, which is the positive rotation direction R1 side in the perpendicular direction. A part of the rotary blade 7 is inserted into the notch 6c, which is formed linearly over both ends in the extension direction. The blade holder 6 has an inclined surface 6d formed at its tip direction end on the surface opposite the mounting target surface 6b in the thickness direction. When viewed from the extension direction, the inclined surface 6d is inclined so as to move away from the surface toward the mounting target surface in the thickness direction as it moves toward the tip direction. The inclined surface 6d faces the notch 6c in the thickness direction.

[0017] The rotary blade 7 is a blade that rotates around the rotation axis O when cutting the cutting object 300. The rotary blade 7 is fixed to the rotary unit 4 in a first radial direction, which is the direction in which the rotary blade 7 is fixed to the rotary unit 4. In this embodiment, two rotary blades 7 are provided for the rotary unit 4. The two rotary blades 7 are fixed to the rotary unit 4 by being held between the blade holder mounting surfaces 41a, 41b and the two blade holders 6, respectively. The rotary blades 7 rotate in the forward rotation direction R1 as the rotary unit 4 rotates in the forward rotation direction R1. When viewed from the non-conveying direction, the rotary blades 7 pass in the forward rotation direction R1, i.e., downward, relative to the fixed blade 11. The rotary blade 7 has a flat plate shape extending in the extension direction, and a cutting edge 7a is formed at the end portion on the tip side, which is on the forward rotation direction R1 side, in the orthogonal direction perpendicular to the extension direction. The cutting edge 7a is formed in a straight line parallel to the extension direction. The cutting edge 7a is formed at an acute angle when viewed from the extension direction, and is inclined in a thickness direction (first radial direction) perpendicular to the extension direction and the perpendicular direction so as to move away from the radially outer surface toward the radially inner back surface in the thickness direction as it moves toward the tip. The rotary blade 7 has a holding portion 7b formed at the end toward the rear end, which is on the reverse rotation direction R2 side in the perpendicular direction, that is, the rear end side. When the blade holder 6 is fixed to the rotating unit 4, the holding portion 7b is located between the blade holder 6 and the blade holder mounting surfaces 41a, 41b, and is held by the blade holder 6 and the rotating main body 41, so that the rotary blade 7 is fixed to the rotating unit 4. When the rotary blade 7 is fixed to the rotating part 4, the cutting edge 7a protrudes further outward from the rotating part 4, i.e., when viewed from the first radial direction, than the blade holder mounting surfaces 41a, 41b in the positive rotation direction R1, and the extension direction of the cutting edge 7a is the extension direction of the blade holder 6.

[0018] As shown in FIGS. 3 to 6 , the blade holder fixing bolts 8 fix the blade holder 6 to the rotating unit 4 with the holding portions 7b of the rotary blade 7 inserted into the notches 6c of the blade holder 6. A blade holder fixing bolt 8 corresponds to each fixing hole 41c, and nine blade holder fixing bolts 8 are provided in this embodiment. Each blade holder fixing bolt 8 has a male thread formed at its tip and a head formed at its rear end. The blade holder fixing bolt 8 is fixed to the rotating unit 4 by threading the female thread formed in the fixing hole 41c with its tip inserted into the through-hole 6a of the blade holder 6, thereby fixing the blade holder 6 to the rotating unit 4 and the rotary blade 7 with its holding portions 7b inserted into the notches 6c to the rotating unit 4. When the rotary blade 7 is fixed to the rotating unit 4, the plurality of fixing holes 41 c are formed in the blade holder mounting surfaces 41 a, 41 b at an angle with respect to the rotation axis O as described above. Therefore, when viewed from the first radial direction, as shown in Fig. 4 , the cutting edge 7 a is inclined such that the one-side end 7 d in the extension direction of the cutting edge 7 a is farther away from the rotation axis O than the other-side end 7 c in the extension direction of the cutting edge 7 a (hereinafter referred to as the "first inclined state"). When the rotary blade 7 is fixed to the rotating unit 4, the blade holder mounting surfaces 41 a, 41 b are formed at an angle with respect to the rotation axis O as described above. Therefore, when viewed from the second radial direction perpendicular to the first radial direction, as shown in Fig. 5 , the cutting edge 7 a is inclined such that the other-side end 7 c is farther away from the rotation axis O than the one-side end 7 d (hereinafter referred to as the "second inclined state"). When the cutting edge 7a is in the first inclined state, the one-side end 7d is positioned farthest from the rotation axis O, and the other-side end 7c is positioned closest to the rotation axis O. On the other hand, when the cutting edge 7a is in the second inclined state, the one-side end 7d is positioned closest to the rotation axis O, and the other-side end 7c is positioned farthest from the rotation axis O. In the cutting machine 1 of this embodiment, by setting the cutting edge 7a in the first inclined state and the second inclined state, the one-side end 7d of the cutting edge 7a can pass past the fixed blade 11 in the forward rotation direction R1 first, and the other-side end 7c of the cutting edge 7a can pass past the fixed blade 11 in the forward rotation direction R1 last.Furthermore, in the cutting machine 1 of this embodiment, by setting the cutting edge 7a in a first inclined state and a second inclined state, when viewed from the width direction, the distance between the cutting edge 7a and the cutting edge 11a when the cutting edge 7a faces the cutting edge 11a in the conveying direction can be made constant from the one-side end 7d to the other-side end 7c.

[0019] As shown in FIGS. 3 to 6 , the blade holder position adjustment mechanism 9 adjusts the position of the blade holder 6 relative to the rotating unit 4 in the orthogonal direction, and adjusts the amount of outward protrusion of the cutting edge 7a relative to the rotating unit 4. The blade holder position adjustment mechanism 9 corresponds to the blade holder 6, and in this embodiment, two blade holder position adjustment mechanisms 9 are provided for the rotating unit 4. The blade holder position adjustment mechanism 9 includes a holding member 91, a holding member fixing bolt 92, and an adjustment screw 93. As shown in FIGS. 3 to 6 , the holding members 91 are fixed to the rotating unit 4 while being placed on the blade holder mounting surfaces 41a and 41b, respectively. The holding members 91 hold the adjustment screws 93 and are formed in the shape of a rectangular pillar extending in the extension direction. The holding member 91 has a plurality of through holes 91a. The plurality of through holes 91a (three in this embodiment) are formed in the holding member 91 at equal intervals in the extension direction. The through-holes 91a are holes into which the retaining member fixing bolts 92 are inserted, and are formed in the thickness direction (first half-direction) perpendicular to the extension direction, with a step formed midway. The retaining member 91 has a plurality of through-holes 91b formed therein. The plurality of through-holes 91b (three in this embodiment) are formed in the retaining member 91 at equal intervals in the extension direction. The through-holes 91b are holes into which the adjustment screws 93 are held, and are formed in the orthogonal direction perpendicular to the extension direction. The retaining member fixing bolts 92 fix the retaining member 91 to the rotating unit 4. The retaining member fixing bolts 92 correspond to each fixing hole 41d, and three are provided in this embodiment. The retaining member fixing bolts 92 have male threads formed at their tip ends and heads formed at their rear ends. The holding member fixing bolt 92, with its tip inserted into the through hole 91a of the holding member 91, is threaded into the female thread formed in the fixing hole 41d, thereby fixing the holding member 91 to the rotating unit 4. Here, as described above, the plurality of fixing holes 41d are formed in the blade holder mounting surfaces 41a, 41b at an angle with respect to the rotation axis O. As shown in Fig. 4, when viewed from the first radial direction, the holding member 91 is inclined so that an end portion on one side in the extension direction of the holding member 91 is farther away from the rotation axis O than an end portion on the other side in the extension direction of the holding member 91. The adjustment screw 93 is capable of changing the amount of protrusion from the holding member 91.The adjustment screws 93 correspond to the through holes 91b, and three are provided in this embodiment. Each adjustment screw 93 is male-threaded. The adjustment screws 93 are held in the holding member 91 by threading into the female threads formed in the through holes 91b. The amount by which the tip of each adjustment screw 93 protrudes toward the blade holder 6 in the orthogonal direction of the holding member 91 changes as the degree of engagement with the through holes 91b changes. The blade holder 6 is fixed to the rotating unit 4 by the blade holder fixing bolts 8 with the tip of each adjustment screw 93 in contact with the side surface of the holding member in the orthogonal direction of the blade holder 6. Therefore, the amount by which the cutting edge 7a protrudes outward from the rotating unit 4 can be adjusted by the amount of protrusion of the adjustment screws 93 while maintaining the first tilted state.

[0020] As shown in FIGS. 1 to 6 , the fixed blade unit 10 is disposed on the conveying direction side of the table 3 and fixes the fixed blade 11 to the base 2. The fixed blade unit 10 includes a fixed member 101, a sliding plate 102, a holding member 103, a holding member fixing bolt 104, and an adjustment bolt 105. When viewed from above, the fixed member 101 is disposed between the table 3 and the rotating unit 4, is fixed to the base 2, and has a rectangular prism shape extending in the width direction. Notches 101a are formed on the upper side surface of the fixed member 101, extending to both ends in the width direction. When viewed from the width direction, the notches 101a are open in the upward and non-conveying directions, corresponding to the sliding plate. Notches 101b are formed on the conveying direction side surface of the fixed member 101, extending to both ends in the width direction. The notches 101b are open in the upward and non-conveying directions, corresponding to the holding member 103. The fixed member 101 has fixing holes 101c formed therein corresponding to the holding member fixing bolts 104. The fixing holes 101c are formed on the non-conveying-direction side of the notch 101b at equal intervals in the width direction (nine in this embodiment). The fixed member 101 has fixing holes 101d formed therein corresponding to the adjustment bolts 105. The fixing holes 101d are formed on the downward-facing side of the notch 101b at equal intervals in the width direction (nine in this embodiment). The sliding plate 102 allows the cutting object 300 to slide easily in the conveying direction when placed thereon. In this embodiment, a highly slidable film or the like is attached to the upward-facing side of the sliding plate 102. The sliding plate 102 is inserted into the notch 101a and fixed to the fixed member 101. The holding member 103 constitutes a fixed blade positioning mechanism, is inserted into the notch 101b, and is fixed to the fixed member 101. The holding member 103 holds the fixed blade 11, is a flat plate extending in the width direction, and has multiple through holes 103a formed therein. A plurality of the through holes 103a (nine in this embodiment) are formed in the holding member 103 at equal intervals in the width direction. The through holes 103a are holes into which holding member fixing bolts 104 are inserted, and are formed in the shape of elongated holes that are long in the vertical direction.Because the through-hole 103a of the holding member 103 is formed in an elongated hole shape, the holding member 103 can move up and down within a predetermined range relative to the fixed member 101 when fixed to the rotating unit 4 by the holding member fixing bolts 104. The holding member fixing bolts 104 fix the holding member 103 to the fixed member 101. One holding member fixing bolt 104 corresponds to each fixing hole 101c, and nine are provided in this embodiment. Each holding member fixing bolt 104 has a male thread formed at its tip and a head formed at its rear end. With its tip inserted into the through-hole 103a of the holding member 103, the holding member 103 is fixed to the fixed member 101 by threading it into the female thread formed in the fixing hole 101c. The adjustment bolt 105 constitutes a fixed blade positioning mechanism and can change the amount of protrusion of the fixed blade 11 relative to the fixed member 101. The adjustment bolts 105 correspond to the fixing holes 101d, and nine of them are formed in this embodiment. Each adjustment bolt 105 has a male thread at its tip and a head at its rear end. The adjustment bolts 105 are held in the fixing member 101 by threading into the female threads formed in the fixing holes 101d. The amount by which the heads of the adjustment bolts 105 protrude upward changes as the degree of engagement with the fixing member 101 changes. The holding member 103 is held in the fixing member 101 by being fixed to the fixing member 101 by welding or the like with the holding member fixing bolts 104, with its lower side surface in contact with the heads of the adjustment bolts 105. Therefore, the cutting edge 11a (described later) of the fixed blade 11 fixed to the fixing member 101 can be adjusted by the amount of protrusion of the adjustment bolts 105 while maintaining a horizontal position (parallel to the width direction).

[0021] As shown in FIGS. 1 to 6 , the fixed blade 11 is a blade that does not change position when cutting the cutting object 300. In this embodiment, one fixed blade 11 is provided for the fixed blade unit 10. The fixed blade 11 is inserted into the notch 101b and fixed to the holding member 103. The fixed blade 11 is flat and extends in the width direction, and a cutting edge 11a is formed at the end of both upper ends facing the conveying direction. The cutting edge 11a is formed linearly. Furthermore, the cutting edge 11a is formed at a right angle or an acute angle approximately at a right angle when viewed from the width direction.

[0022] The operation control unit 12 controls the cutting machine 1. The control unit 12 operates an operation switch (not shown) or the like to cause the cutting machine 1 to continuously or intermittently cut the object 100. The operation control unit 12 controls at least the rotation mechanism 5, and controls the rotation / stop, rotation direction, rotation speed, etc. of the rotating unit 4 by controlling the drive of the servo motor.

[0023] Next, the cutting of the object 300 by the cutting machine 1 will be described. As shown in FIGS. 3 , 7 , and 8 , the rotating unit 4 of the cutting machine 1 rotates, causing the two rotary blades 7 to repeatedly cut the object 300 being conveyed in the conveyance direction. Specifically, as shown in FIG. 3 , an operator operates the operation control unit 12 to rotate the rotating unit 4 in the forward rotation direction R1 using the rotation mechanism 5. Next, the operator places the object 300 on the table 3. Next, the operator conveys the object 300 in the conveyance direction relative to the table 3 so that the conveyance direction side end 301 of the object 300 is closer to the fixed blade 11 in the conveyance direction than the fixed blade 11 when viewed from the non-conveyance direction, as shown in FIG. 7 . Next, as the rotating unit 4 of the cutting machine 1 rotates in the forward rotation direction R1, the one side end 7 d of the blade tip 7 a first comes into contact with the upper side surface 302 of the object 300 when viewed from the non-conveyance direction. Therefore, the cutting machine 1 starts cutting the object 300 from one side end (right-hand side end) of both widthwise ends of the object 300. Next, as the rotating unit 4 of the cutting machine 1 further rotates in the forward rotation direction R1, the one side end 7d of the cutting edge 7a further penetrates into the object 300 in the forward rotation direction R1, as viewed from the non-conveying direction, and the portion of the cutting edge 7a on the other side of the one side end 7d comes into contact with the upper side surface 302, and finally the other side end 7c comes into contact with the upper side surface 302. Next, as the rotating unit 4 of the cutting machine 1 further rotates in the forward rotation direction R1, the one side end 7d of the cutting edge 7a first passes under the fixed blade 11 in the forward rotation direction R1, as viewed from the non-conveying direction. Next, as the rotating unit 4 of the cutting machine 1 further rotates in the forward rotation direction R1, when viewed from the non-conveying direction, the portion of the cutting edge 7a that is on the other side of the one-side end 7d passes through the fixed blade 11 in the forward rotation direction R1, and finally the other-side end 7c passes through the fixed blade 11 in the forward rotation direction R1. As a result, as shown in Figure 8, the object 300 to be cut is cut by the cutting machine 1, and the cut portion 310 passes through the opening 2b due to its own weight and is carried out of the cutting machine 1 through the discharge port 2a.

[0024] As described above, in the cutting machine 1 of this embodiment, the rotary blade 7 fixed to the rotating unit 4 passes over the fixed blade 11 in the forward rotation direction R1 to cut the object 300. That is, in the cutting machine 1, the trajectory of the rotary blade 7 for cutting the object 300 is a circle. Therefore, the cutting machine 1 can cut the object 300 by one rotation of the rotating unit 4, regardless of the thickness of the object 300. When the object 300 is cut with a blade that reciprocates in the up-and-down direction, the cutting time varies depending on the thickness of the object 300. However, in the cutting machine 1 of this embodiment, the cutting time can be set according to the rotation speed regardless of the thickness of the object 300, so that a single cut of the object 300 can be made in a short time even if the object is thick.

[0025] In the cutting machine 1 of this embodiment, the rotary blade 7 is held detachably by the blade holder 6, so that the rotary blade 7 can be easily replaced when it deteriorates.

[0026] Furthermore, since the cutting machine 1 in this embodiment is provided with two rotary blades 7, the cutting object 300 can be cut twice during one rotation of the rotating part 4. Therefore, when the cutting machine 1 is provided with multiple rotary blades 7, the cutting interval can be reduced to half or less compared to when a single rotary blade 7 is provided. This allows for many cuts to be made in a short period of time.

[0027] Although the cutting machine 1 in this embodiment has the rotating body 41 formed from a single metal member, this is not limiting. FIG. 9 is a perspective view showing a modified example of the cutting machine. As shown in FIG. 9 , the cutting machine 1 may have a rotating unit 4 formed from a single rotating body 44, multiple connecting members 45, and two mounting members 46, 47. The rotating body 44 is cylindrical, with shafts 42, 43 formed at both ends in the width direction. The multiple connecting members 45 are flat, with holes (not shown) formed therein into which the rotating body 44 is inserted. With the rotating body 44 inserted, the mounting members 46, 47 are fixed (e.g., by welding) at equal intervals to the rotating body 44. The mounting members 46, 47 each have a blade holder mounting surface 41a, 41b. The mounting members 46, 47 are fixed (e.g., by welding) to both radial ends of the multiple connecting members 45. The blade holder mounting surfaces 41a and 41b are formed radially outward of the mounting portions 46 and 47, respectively, and the blade holder 6 and the rotary blade 7 are fixed thereto.

[0028] In addition, in this embodiment, the cutting machine 1 has an operator manually transport the cutting object 300 placed on the table 3 in the transport direction, but this is not limited to this, and the cutting object 300 may also be transported automatically in the transport direction by a loading device such as a conveyor or actuator.

[0029] Furthermore, the cutting machine 1 in this embodiment may automatically carry out the cut portion 310 discharged from the discharge port 2a to any position using a discharge device such as a conveyor. In this case, the direction in which the cut portion 310 is discharged by the discharge device is preferably the conveyance direction or the width direction.

[0030] Furthermore, although the cutting machine 1 in this embodiment is provided with two rotary blades 7, this is not limited thereto and one, or three or more may be provided. When three or more rotary blades 7 are provided on the rotating part 4, it is preferable that they are fixed at equal intervals in the forward rotation direction R1 relative to the rotating part 4.

[0031] REFERENCE SIGNS LIST 1 Cutting machine 2 Base 3 Table 4 Rotating unit 5 Rotation mechanism 6 Blade holder 7 Rotating blade 8 Blade holder fixing bolt 9 Blade holder position adjustment mechanism 10 Fixed blade unit 11 Fixed blade 12 Operation control unit 9: Connector

Claims

1. A cutting machine comprising: a table for placing an object to be cut; a fixed blade disposed on the conveyance direction side of the object to be cut with respect to the table; a rotating portion disposed spaced apart from the fixed blade in the conveyance direction; a rotating mechanism for rotating the rotating portion around a rotation axis parallel to the width direction orthogonal to the conveyance direction; a rotating blade fixed to the rotating portion in a first radial direction which is a direction fixed to the rotating portion, and which cuts the object to be cut by passing the fixed blade in the rotation direction when viewed from the non-conveyance direction which is the direction opposite to the conveyance direction; wherein the rotating blade is in a flat plate shape extending in the extending direction, a blade tip is formed at an end portion on the tip direction side which is one of the directions orthogonal to the extending direction, the blade tip protrudes outside the rotating portion, when viewed from the first radial direction, the blade tip is inclined such that one end portion in the extending direction of the blade tip is farther from the rotation axis than the other end portion in the extending direction of the blade tip, and when viewed from a second radial direction orthogonal to the first radial direction, the blade tip is inclined such that the other end portion is farther from the rotation axis than the one end portion, and is fixed to the rotating portion.

2. The cutting machine according to claim 1, further comprising a blade holder for detachably holding the rotating blade, wherein the rotating portion is formed with a blade holder mounting surface for mounting the blade holder on the outer side in the radial direction, the blade holder is fixed to the rotating portion in a state of being mounted on the blade holder mounting surface, and the rotating blade is fixed to the rotating portion by being held between the blade holder mounting surface and the blade holder.

3. The cutting machine according to claim 1 or 2, wherein a plurality of the fixed blades are fixed to the rotating portion at equal intervals in the rotation direction of the rotating portion.

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