Cutting machine

Abstract

To provide a cutting machine which can cut an object to be cut one time in a short time even if the object to be cut is thick.SOLUTION: In a cutting machine 1, a rotary blade 7 is fixed to a rotation section 4 in a first radial direction. The rotary blade 7 cuts an object 300 to be cut by passing a fixed blade 11 in a normal rotation direction R1 when viewed from a non-conveying direction. A cutting edge 7a of the rotary blade 7 is formed to project outward more than the rotation section 4. The rotary blade 7 is fixed to the rotation section 4 because the cutting edge 7a is inclined so that one direction side end in an extension direction of the cutting edge 7a is farther away from a rotary shaft than the other direction side end in the extension direction of the cutting edge 7a when viewed from the first radial direction, and the cutting edge 7a is inclined so that the other direction side end is farther away from the rotary shaft than the one direction end when viewed from a second radial direction orthogonal to the first radial direction.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] A cutting machine cuts a cutting target by a blade that is longer than the width of the cutting target and transports the cutting target in the transport direction. Most of the trajectories of the blade with respect to the cutting target reciprocate in the vertical direction (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, for a cutting target such as a material before processing, it is sufficient that the weight of the cut portion by the cutting machine is within a predetermined range, and the cutting accuracy such as the deformation and smoothness of the cut surface may not be highly required. In addition, since a large amount of the cutting target such as a material before processing is used during processing, it is necessary to prepare a large number of cut portions in a short time, and thus it may be required to perform one cutting in a short time. Among cutting machines, those in which the trajectory of the blade reciprocates in the vertical direction have a cutting speed that changes depending on the thickness of the cutting target due to the reciprocating motion. That is, as the thickness of the cutting target increases, it takes a long time to perform the cutting.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a cutting machine capable of performing one cutting on a cutting target in a short time even when the thickness of the cutting target is large.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, the cutting machine according to the present embodiment includes a table on which an object to be cut is placed, 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 on the conveyance direction side, a rotation mechanism that rotates the rotating portion around a rotation axis parallel to the width direction orthogonal to the conveyance direction, and a rotary blade that is fixed to the rotating portion in a first radial direction that is a direction fixed to the rotating portion, and that cuts the object to be cut by passing the fixed blade in the rotation direction when viewed from the non-conveyance direction that is the direction opposite to the conveyance direction. The rotary blade is in a flat plate shape extending in the extending direction, a blade tip is formed at an end on the tip direction side which is one of the directions orthogonal to the extending direction, the blade tip protrudes outside the rotating portion, and 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 with respect to the rotation axis, and is fixed to the rotating portion.

Effect of the Invention

[0007] The cutting machine according to the present invention has an effect that even if the thickness of the object to be cut is thick, a single cut on the object to be cut can be performed in a short time.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

DETAILED DESCRIPTION OF THE INVENTION

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

[0010] 〔Embodiment〕 FIG. 1 is a perspective view of the cutting machine in the embodiment. FIG. 2 is a perspective view of the cutting machine in the embodiment. FIG. 3 is a cross-sectional view of the main part of the cutting machine in the embodiment. FIG. 4 is a plan view of the main part when the cutting machine in the embodiment is viewed from the first radial direction. FIG. 5 is a front view of the main part when the cutting machine in the embodiment is viewed from the second radial direction. FIG. 6 is an exploded perspective view of a tool holder and the like in the embodiment. Also, in each figure (including FIGS. 7 to 9), the X direction is the depth direction of the cutting machine, the Y direction in each figure is orthogonal to the X direction and is the width direction of the cutting machine, and the Z direction in each figure is orthogonal to the X direction and the Y direction and is the vertical direction of the cutting machine. X1 is the conveyance direction, X2 is the non-conveyance direction, Y1 is the right direction, Y2 is the left direction, Z1 is the upward direction, and Z2 is the downward direction. Note that FIG. 3 (including FIGS. 7 and 8) is a cross-sectional view cut by a plane including the depth direction and the vertical direction of the rotating part and the like, FIG. 4 is a view when the rotating part and the like are viewed from above, and FIG. 5 is a view when the rotating part and the like are viewed from the non-conveyance direction.

[0011] As shown in Fig. 1, the cutting machine 1 is for cutting a cutting target 300, and includes a base 2, a table 3, a rotating part 4, a rotating mechanism 5, a blade holder 6, a rotating blade 7, a bolt 8 for fixing the blade holder, a blade holder position adjusting mechanism 9, a fixed blade unit 10, a fixed blade 11, and an operation control unit 12. Here, for the cutting target 300, it is preferable that the weight and volume of the cut part 310 are within a predetermined range rather than the cutting accuracy such as the deformation and smoothness of the cut surface of the cut part 310 described later. Specifically, the cutting target 300 is a material formed in a strip shape or a rectangular shape before processing, for example, a rubber material before vulcanization, a plastic material before molding, etc. Further, it is more preferable that the cutting target 300 has a greater thickness, and the cutting target 300 with a thickness of several centimeters to several tens of centimeters is preferable, and furthermore, the cutting target 300 with a thickness of 30 mm to 250 mm is preferable. Note that the thickness also includes the case where the cutting target 300 is stacked and becomes thicker than the thickness of a single cutting target 300.

[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 on the upper side. The base 2 is formed in a box shape from a plurality of frame materials, a plurality of panel materials, etc. The base 2 has support members 21, 22, 23 and bearing members 24, 25. The support members 21, 22, 23 are fixed to other members of the base 2. The support member 21 is formed to extend in the width direction. The support members 22, 23 are respectively arranged on the conveyance direction sides of both ends in the width direction of the support member 21. The support members 21, 22, 23 are configured in a U shape when viewed from the vertical direction. The bearing members 24, 25 rotatably support the rotating part 4, and are respectively fixed on the upper sides of the support members 22, 23. The bearing members 24, 25 are arranged at intervals in the width direction with respect to the base 2. Further, as shown in Fig. 2, the base 2 is formed with a carry-out port 2a. The carry-out port 2a is formed on the lower side of the conveyance direction side surface of the base 2, and communicates with an opening 2b formed by the support members 21, 22, 23.

[0013] Table 3, as shown in FIG. 1, is for placing the object to be cut 300 and is provided on the upper side with respect to the base 2. Table 3 has a placement surface 3a for the object to be cut on the upper side. The placement surface 3a for the object to be cut is on a plane, and at least the length in the width direction is set longer than that of the object to be cut 300 with the maximum length in the width direction among the objects to be cut 300 set as the object to be cut 300 of the cutting machine 1. Table 3 has a plurality of ball casters. The ball caster 31 has a ball and a ball support member that rotatably supports the balls. The plurality of ball casters 31 respectively correspond to a plurality of holes formed in the placement surface 3a for the object to be cut, and are fixed to the table 3 in a state where the balls protrude upward from the placement surface 3a for the object to be cut. As a result, for the object to be cut 300, the portion facing the placement surface 3a for the object to be cut in the vertical direction among the objects to be cut 300 is supported by the plurality of ball casters 31, so that the object to be cut 300 can be easily moved in the transport direction with respect to the table 3.

[0014] As shown in FIGS. 1 to 5, the rotating part 4 rotates around the rotation axis O parallel to the width direction, thereby rotating the rotary blade 7 fixed to the rotating part 4 around the rotation axis O. The rotating part 4 is arranged at a distance from the table 3 on the conveyance direction side. The rotating part 4 has a rotating main body part 41 and two shaft parts 42 and 43. The rotating main body part 41 fixes the rotary blade 7 and is composed of one metal member. The rotating main body part 41 is rotatable around the rotation axis O and rotates in the normal rotation direction R1 and the reverse rotation direction R2. On the outer side in the radial direction, that is, on the outer peripheral surface of the rotating main body part 41, blade holder mounting surfaces 41a and 41b for mounting the blade holder 6 are formed. The blade holder mounting surfaces 41a and 41b are arranged opposite to each other in the radial direction, and the blade holder 6 and the rotary blade 7 correspond to each of them respectively. That is, in the present embodiment, two rotary blades 7 are fixed to the rotating part 4, and the two rotary blades 7 are arranged at equal intervals in the normal rotation direction R1 (reverse rotation direction R2) with respect to the rotating part 4. The blade holder mounting surfaces 41a and 41b are flat surfaces, and when viewed from the second radial direction orthogonal to the first radial direction, which is the direction for fixing the rotary blade 7 to the rotating part 4, the end part on the other direction side in the width direction is inclined so as to be farther from the one direction side end part with respect to the rotation axis O. For example, when the second radial direction is parallel to the depth direction, as shown in FIG. 5, the blade holder mounting surfaces 41a and 41b are inclined so as to be farther upward as they go rightward with respect to the rotation axis O when viewed from the non-conveyance direction. Also, the blade holder mounting surfaces 41a and 41b are formed to extend in the tangential direction of the rotating part 4 when viewed from the width direction. The blade holder mounting surfaces 41a and 41b are formed with fixing holes 41c corresponding to the blade holder fixing bolts 8. A plurality of fixing holes 41c, nine in this embodiment, are formed at equal intervals in the width direction with respect to each blade holder mounting surface 41a and 41b. When viewed from the first radial direction, the fixing holes 41c on one direction side in the width direction are inclined so as to be farther from the fixing holes 41c on the other direction side with respect to the rotation axis O. For example, when the first radial direction is parallel to the vertical direction, as shown in FIG. 4, the plurality of fixing holes 41c are inclined so as to be farther in the non-conveyance direction as they go leftward with respect to the rotation axis O when viewed from above.The blade holder placement surfaces 41a and 41b are formed with fixing holes 41d corresponding to the bolts 92 for fixing the holding members, which will be described later. A plurality of fixing holes 41d, three in number in this embodiment, are formed at equal intervals in the width direction with respect to each of the blade holder placement surfaces 41a and 41b. The plurality of fixing holes 41d are formed on the reverse rotation direction R2 side of the plurality of fixing holes 41c. When viewed from the first radial direction, the plurality of fixing holes 41d are formed to be inclined such that the fixing holes 41d on one side in the width direction with respect to the rotation axis O are farther away from the fixing holes 41d on the other side. For example, when the first radial direction is parallel to the vertical direction, as shown in FIG. 4, the plurality of fixing holes 41d are formed to be inclined so as to move away in the non-conveying direction as they go leftward with respect to the rotation axis O when viewed from above. Also, the inclination direction of the plurality of fixing holes 41d is set to be parallel to the inclination direction of the plurality of fixing holes 41c. The two shaft portions 42 and 43 support the rotation main body portion 41, project in the width direction at both ends in the width direction of the rotation main body portion 41, and are fixed to the rotation main body portion 41. The two shaft portions 42 and 43 are rotatably supported by the bearing members 24 and 25 around the rotation axis O, respectively. Thereby, the rotating portion 4 can rotate around the rotation axis O on the upper side of the support members 21, 22, and 23. Here, the forward rotation direction R1 is the direction in which the rotating portion 4 rotates downward when viewed from the non-conveying direction, and the reverse rotation direction R2 is the direction in which the rotating portion 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 part 4 around the rotation axis O. Although not shown in the figure, the rotation mechanism 5 includes a servo motor, a speed reduction mechanism, and a transmission mechanism. The servo motor is an actuator that generates a rotational driving force and performs a rotational motion by the power supplied from outside the cutting machine 1. The speed reduction mechanism reduces the rotational speed of the servo motor and increases the rotational torque. The input side is connected to the rotation axis 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 part 4 due to the reduction of the rotational speed by the speed reduction mechanism. For example, it includes an input side gear, an output side gear, and a chain. The input side gear is connected to the output side of the speed reduction mechanism. The output side gear is formed with a larger gear diameter than the input side gear and is connected to the rotating part 4, which is the shaft part 43 in this embodiment. The chain is wound around between the input side gear and the output side 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 portion 4. The two blade holders 6 are fixed in the first radial direction, which is the direction of fixing to the rotating portion 4, in a state where they are respectively placed on the blade holder mounting surfaces 41a and 41b. The blade holder 6 has a flat plate shape extending in the extending direction, and a plurality of through holes 6a are formed therein. A plurality of through holes 6a, a plurality of which are equally spaced in the extending direction, nine in this embodiment, are formed in the blade holder 6. The through hole 6a is a hole into which the blade holder fixing bolt 8 is inserted, and is formed in a long hole shape that is long in the orthogonal direction orthogonal to the extending direction. The through hole 6a is formed in the thickness direction (first half direction) orthogonal to the extending direction and the orthogonal direction, and a step is formed in the middle. Since the through hole 6a of the blade holder 6 is formed in a long hole shape, when the blade holder 6 is fixed to the rotating portion 4 by the blade holder fixing bolt 8, it can move within a predetermined range in the orthogonal direction with respect to the rotating portion 4. When the blade holder 6 is placed on the blade holder mounting surfaces 41a and 41b, a mounting target surface 6b that contacts the blade holder mounting surfaces 41a and 41b is formed. A notch 6c is formed at the end of the mounting target surface 6b on the tip direction side, which is the positive rotation direction R1 side, in the orthogonal direction. The notch 6c is for inserting a part of the rotary blade 7, and is linearly formed over both ends in the extending direction. On the surface of the blade holder 6, which is the surface opposite to the mounting target surface 6b in the thickness direction, an inclined surface 6d is formed at the end on the tip direction side. When viewed from the extending direction, the inclined surface 6d is inclined so as to move away from the mounting target surface direction in the thickness direction as it goes in the tip direction with respect to the surface. 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 object to be cut 300. The rotary blade 7 is fixed to the rotating part 4 in the first radial direction which is the direction of being fixed to the rotating part 4. In this embodiment, two rotary blades 7 are provided with respect to the rotating part 4. The two rotary blades 7 are fixed to the rotating part 4 by being respectively held between the blade holder mounting surfaces 41a, 41b and the two blade holders 6. The rotary blade 7 rotates in the forward rotation direction R1 when the rotating part 4 rotates in the forward rotation direction R1, and when viewed from the non-conveying direction, it passes through the fixed blade 11 in the forward rotation direction R1, that is, downward. The rotary blade 7 is in a flat plate shape extending in the extending direction, and a blade tip 7a is formed at the end on the tip direction side which is the forward rotation direction R1 side among the orthogonal directions orthogonal to the extending direction. The blade tip 7a is formed in a straight line parallel to the extending direction. When viewed from the extending direction, the blade tip 7a is formed at an acute angle, and among the thickness direction (the first radial direction) orthogonal to the extending direction and the orthogonal direction, with respect to the outer surface in the radial direction, it is inclined so as to move away from the back surface direction on the inner side in the radial direction in the thickness direction as it goes in the tip direction. The rotary blade 7 is formed with a holding portion 7b at the end on the rear end direction side which is the reverse rotation direction R2 side among the orthogonal directions, and the holding portion 7b is inserted into the notch 6c of the blade holder 6. The holding portion 7b is located between the blade holder 6 and the blade holder mounting surfaces 41a, 41b in a state where the blade holder 6 is fixed to the rotating part 4, and is held by the blade holder 6 and the rotating body part 41, so that the rotary blade 7 is fixed to the rotating part 4. In a state where the rotary blade 7 is fixed to the rotating part 4, the blade tip 7a protrudes to the forward rotation direction R1 side with respect to the blade holder mounting surfaces 41a, 41b, that is, outside the rotating part 4, that is, when viewed from the first radial direction, and the extending direction of the blade tip 7a is the extending direction of the blade holder 6.

[0018] As shown in FIGS. 3 to 6, the bolt 8 for fixing the tool holder fixes the tool holder 6 to the rotating part 4 with the holding part 7b of the rotary blade 7 inserted into the notch 6c of the tool holder 6. The bolts 8 for fixing the tool holder correspond to the respective fixing holes 41c and there are nine of them in the present embodiment. The bolts 8 for fixing the tool holder have male threads formed at the tip ends and heads formed at the rear ends. With the tip ends of the bolts 8 for fixing the tool holder inserted into the through holes 6a of the tool holder 6, the tool holder 6 is fixed to the rotating part 4 by screwing into the female threads formed in the fixing holes 41c, and the rotary blade 7 with the holding part 7b inserted into the notch 6c is fixed to the rotating part 4. Here, in a state where the rotary blade 7 is fixed to the rotating part 4, since the plurality of fixing holes 41c are inclined with respect to the rotation axis O and formed in the tool holder mounting surfaces 41a, 41b as described above, as shown in FIG. 4, when viewed from the first radial direction, the cutting edge 7a is inclined such that one-direction side end portion 7d in the extending direction of the cutting edge 7a is farther from the rotation axis O than the other-direction side end portion 7c in the extending direction of the cutting edge 7a (hereinafter referred to as "first inclined state"). Further, in a state where the rotary blade 7 is fixed to the rotating part 4, since the tool holder mounting surfaces 41a, 41b are inclined with respect to the rotation axis O as described above, as shown in FIG. 5, when viewed from the second radial direction orthogonal to the first radial direction, the cutting edge 7a is inclined such that the other-direction side end portion 7c is farther from the rotation axis O than the one-direction side end portion 7d with respect to the rotation axis O (hereinafter referred to as "second inclined state"). When the cutting edge 7a is in the first inclined state, the position of the one-direction side end portion 7d with respect to the rotation axis O becomes the farthest and the position of the other-direction side end portion 7c with respect to the rotation axis O becomes the closest. On the other hand, when the cutting edge 7a is in the second inclined state, the position of the one-direction side end portion 7d with respect to the rotation axis O becomes the closest and the position of the other-direction side end portion 7c with respect to the rotation axis O becomes the farthest. The cutting machine 1 in the present embodiment can pass the one-direction side end portion 7d of the cutting edge 7a through the fixed blade 11 first in the forward rotation direction R1 and pass the other-direction side end portion 7c of the cutting edge 7a through the fixed blade 11 last in the forward rotation direction R1 by making the cutting edge 7a in the first inclined state and the second inclined state.Further, by setting the cutting edge 7a of the cutting machine 1 in the first inclined state and the 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 conveyance direction with respect to the cutting edge 11a can be made constant from the one-direction side end portion 7d to the other-direction side end portion 7c.

[0019] As shown in FIGS. 3 to 6, the blade holder position adjusting mechanism 9 adjusts the position of the blade holder 6 in the direction orthogonal to the rotating part 4, and adjusts the amount of protrusion of the cutting edge 7a outward with respect to the rotating part 4. The blade holder position adjusting mechanism 9 corresponds to the blade holder 6, and in the present embodiment, two are provided with respect to the rotating part 4. The blade holder position adjusting mechanism 9 includes a holding member 91, a bolt 92 for fixing the holding member, and an adjusting screw 93. As shown in FIGS. 3 to 6, the holding member 91 is fixed to the rotating part 4 in a state of being placed on the blade holder mounting surfaces 41a and 41b, respectively. The holding member 91 holds the adjusting screw 93, and is formed in a quadrangular prism shape extending in the extending direction. The holding member 91 is formed with a plurality of through holes 91a. A plurality of the through holes 91a are formed at equal intervals in the extending direction with respect to the holding member 91, and in this embodiment, three are formed. The through hole 91a is a hole into which the bolt 92 for fixing the holding member is inserted, and is formed in the thickness direction (first half direction) orthogonal to the extending direction, and a step is formed in the middle. The holding member 91 is formed with a plurality of through holes 91b. A plurality of the through holes 91b are formed at equal intervals in the extending direction with respect to the holding member 91, and in this embodiment, three are formed. The through hole 91b is a hole for holding the adjusting screw 93, and is formed in the orthogonal direction orthogonal to the extending direction. The bolt 92 for fixing the holding member fixes the holding member 91 to the rotating part 4. The bolt 92 for fixing the holding member corresponds to each fixing hole 41d, and in this embodiment, there are three. The bolt 92 for fixing the holding member has a male screw formed at the tip and a head formed at the rear end. The bolt 92 for fixing the holding member is screwed into the female screw formed in the fixing hole 41d with the tip inserted into the through hole 91a of the holding member 91, so that the holding member 91 is fixed to the rotating part 4. Here, as described above, since the plurality of fixing holes 41d are inclined with respect to the rotation axis O and formed in the blade holder mounting surfaces 41a and 41b, as shown in FIG. 4, when viewed from the first radial direction, the holding member 91 is inclined such that one end portion of the holding member 91 in one direction in the extending direction is farther from the rotation axis O than the other end portion of the holding member 91 in the other direction in the extending direction. The adjusting screw 93 can change the amount of protrusion from the holding member 91.The adjustment screw 93 corresponds to the through hole 91b and there are three of them in the present embodiment. The adjustment screw 93 has a male thread formed throughout. The adjustment screw 93 is held by the holding member 91 by screwing into the female thread formed in the through hole 91b. By changing the degree of screwing into the through hole 91b, the protruding amount of the tip portion of the adjustment screw 93 in the direction orthogonal to the holding member 91 and protruding toward the cutting tool holder 6 changes. Here, the cutting tool holder 6 is fixed to the rotating portion 4 by the cutting tool holder fixing bolt 8 in a state where the tip portion of each adjustment screw 93 is in contact with the side surface of the holding member in the direction orthogonal to the cutting tool holder 6. Therefore, the cutting edge 7a can adjust the amount of protrusion outward with respect to the rotating portion 4 according to the protruding amount of the adjustment screw 93 while maintaining the first inclined state.

[0020] As shown in FIGS. 1 to 6, the fixed blade unit 10 is disposed on the conveyance direction side with respect to the table 3 and fixes the fixed blade 11 to the base 2. The fixed blade unit 10 includes a fixing member 101, a sliding plate 102, a holding member 103, a bolt 104 for fixing the holding member, and an adjusting bolt 105. When viewed from above, the fixing member 101 is disposed between the table 3 and the rotating unit 4 and is fixed to the base 2, and has a rectangular prism shape extending in the width direction. Notches 101a are formed up to both ends in the width direction on the upper side surface of the fixing member 101. The notch 101a is formed to open upward and in the non-conveyance direction when viewed from the width direction, and corresponds to the sliding plate. Notches 101b are formed up to both ends in the width direction on the conveyance direction side surface of the fixing member 101. The notch 101b is formed to open upward and in the conveyance direction, and corresponds to the holding member 103. Fixing holes 101c corresponding to the bolts 104 for fixing the holding member are formed in the fixing member 101. In the present embodiment, a plurality of fixing holes 101c, nine in number, are formed at equal intervals in the width direction with respect to the non-conveyance direction side surface of the notch 101b. Fixing holes 101d corresponding to the adjusting bolts 105 are formed in the fixing member 101. In the present embodiment, a plurality of fixing holes 101d, nine in number, are formed at equal intervals in the width direction with respect to the lower side surface of the notch 101b. The sliding plate 102 is configured to easily slide the object to be cut 300 in the conveyance direction when the object to be cut 300 is placed thereon. In the present embodiment, a film or the like having high slidability is adhered to the upper side surface of the sliding plate 102. The sliding plate 102 is inserted into the notch 101a and fixed to the fixing member 101. The holding member 103 constitutes a fixed blade positioning mechanism, is inserted into the notch 101b, and is fixed to the fixing member 101. The holding member 103 holds the fixed blade 11, has a flat plate shape extending in the width direction, and a plurality of through holes 103a are formed therein. In the present embodiment, a plurality of through holes 103a, nine in number, are formed at equal intervals in the width direction with respect to the holding member 103. The through hole 103a is a hole into which the bolt 104 for fixing the holding member is inserted, and is formed in an elongated hole shape that is long in the vertical direction.Since the through hole 103a of the holding member 103 is formed in an elongated hole shape, when the holding member 103 is fixed to the rotating portion 4 by the holding member fixing bolt 104, it can move within a predetermined range in the vertical direction with respect to the fixing member 101. The holding member fixing bolt 104 is for fixing the holding member 103 to the fixing member 101. The holding member fixing bolts 104 correspond to the respective fixing holes 101c and there are nine of them in this embodiment. The holding member fixing bolt 104 has a male thread formed at its tip and a head formed at its rear end. The holding member fixing bolt 104 is screwed into the female thread formed in the fixing hole 101c with its tip inserted into the through hole 103a of the holding member 103, whereby the holding member 103 is fixed to the fixing member 101. The adjusting bolt 105 constitutes a fixed blade positioning mechanism and can change the protruding amount of the fixed blade 11 with respect to the fixing member 101. The adjusting bolts 105 correspond to the fixing holes 101d and nine of them are formed in this embodiment. The adjusting bolt 105 has a male thread formed at its tip and a head formed at its rear end. The adjusting bolt 105 is screwed into the female thread formed in the fixing hole 101d and is held by the fixing member 101. As the degree of screwing of the adjusting bolt 105 with respect to the fixing member 101 changes, the protruding amount by which the head protrudes upward changes. Here, the holding member 103 is held by the fixing member 101 by being fixed to the fixing member 101 by welding or the like with the holding member fixing bolt 104 in a state where the lower side surface is in contact with the heads of the respective adjusting bolts 105. Therefore, the cutting edge 11a, which will be described later, of the fixed blade 11 fixed to the fixing member 101 can adjust the protruding amount upward with respect to the fixing member 101 according to the protruding amount of the adjusting bolt 105 while maintaining a horizontal state (a state parallel to the width direction).

[0021] As shown in FIGS. 1 to 6, the fixed blade 11 is a blade that does not change its position when cutting the object to be cut 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 has a flat plate shape extending in the width direction, and a cutting edge 11a is formed at the end on the conveyance direction side among both ends on the upper side. The cutting edge 11a is formed in a straight line. Further, when viewed from the width direction, the cutting edge 11a is formed at a right angle or substantially at a right angle on the acute angle side.

[0022] The operation control unit 12 controls the cutting machine 1. By operating an operation switch (not shown) or the like, the operation control unit 12 causes the cutting machine 1 to continuously or intermittently perform the cutting operation of the object to be cut 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 performing drive control of the servo motor.

[0023] Next, the cutting of the object to be cut 300 by the cutting machine 1 will be described. As shown in FIGS. 3, 7, and 8, the cutting machine 1 repeatedly cuts the object to be cut 300 conveyed in the conveying direction with two rotary blades 7 by rotating the rotating part 4. Specifically, as shown in FIG. 3, the operator operates the operation control unit 12 to rotate the rotating part 4 in the forward rotation direction R1 by the rotation mechanism 5. Next, the operator places the object to be cut 300 on the table 3. Next, when viewed from the non-conveying direction, before the rotary blade 7 passes the fixed blade 11 in the forward rotation direction R1, the operator conveys the object to be cut 300 in the conveying direction with respect to the table 3 so that the conveying direction side end portion 301 of the object to be cut 300 is on the conveying direction side of the fixed blade 11. Next, when the rotating part 4 of the cutting machine 1 rotates in the forward rotation direction R1, as shown in FIG. 7, when viewed from the non-conveying direction, one-direction side end portion 7d of the blade tip 7a first contacts the upper side surface 302 of the object to be cut 300. Therefore, the cutting machine 1 starts cutting the object to be cut 300 from one-direction side end portion (right direction side end portion) of both end portions in the width direction of the object to be cut 300. Next, when the rotating part 4 of the cutting machine 1 further rotates in the forward rotation direction R1, when viewed from the non-conveying direction, the one-direction side end portion 7d of the blade tip 7a further enters the object to be cut 300 in the forward rotation direction R1, and the portion of the blade tip 7a on the other direction side of the one-direction side end portion 7d contacts the upper side surface 302, and finally the other direction side end portion 7c contacts the upper side surface 302. Next, when the rotating part 4 of the cutting machine 1 further rotates in the forward rotation direction R1, when viewed from the non-conveying direction, the one-direction side end portion 7d of the blade tip 7a first passes the fixed blade 11 in the forward rotation direction R1. Next, when the rotating part 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 blade tip 7a on the other direction side of the one-direction side end portion 7d passes the fixed blade 11 in the forward rotation direction R1, and finally the other direction side end portion 7c passes the fixed blade 11 in the forward rotation direction R1. As a result, as shown in FIG. 8, the object to be cut 300 is cut by the cutting machine 1, and the cut portion 310 passes through the opening 2b by its own weight and is carried out of the cutting machine 1 from the carry-out port 2a.

[0024] As described above, in the cutting machine 1 of the present embodiment, the rotary blade 7 fixed to the rotating portion 4 passes through the fixed blade 11 in the normal rotation direction R1, thereby cutting the object to be cut 300. That is, in the cutting machine 1, the locus of the rotary blade 7 for cutting the object to be cut 300 is a circle. Therefore, regardless of the thickness of the object to be cut 300, the object to be cut 300 can be cut by one rotation of the rotating portion 4. When cutting the object to be cut 300 with a blade that reciprocates in the vertical direction, the cutting time changes depending on the thickness of the object to be cut 300. However, the cutting machine 1 in the present embodiment can set the cutting time according to the rotation speed regardless of the thickness of the object to be cut 300. Therefore, even if the thickness of the object to be cut is large, a single cut on the object to be cut 300 can be performed in a short time.

[0025] In the cutting machine 1 of the present embodiment, since the rotary blade 7 is detachably held with respect to the blade holder 6, the rotary blade 7 can be easily replaced as the rotary blade 7 deteriorates.

[0026] Further, in the cutting machine 1 of the present embodiment, since two rotary blades 7 are provided, the object to be cut 300 can be cut twice while the rotating portion 4 makes one rotation. Therefore, the cutting machine 1 can make the cutting interval half or less when a plurality of rotary blades 7 are provided, as compared with the case where only one rotary blade 7 is provided. Thereby, many cuts can be performed in a short time.

[0027] Note that although the cutting machine 1 in this embodiment is composed of a single metal member for the rotating main body 41, it is not limited to this. FIG. 9 is a perspective view showing a modified example of the cutting machine. As shown in FIG. 9, the cutting machine 1 may include a single rotating main body 44, a plurality of connecting parts 45, and two mounting parts 46 and 47 to form the rotating part 4. The rotating main body 44 is cylindrical, and shaft parts 42 and 43 are formed at both ends in the width direction. The plurality of connecting parts 45 are flat plates, with holes (not shown) into which the rotating main body 44 is inserted, and are fixed (e.g., welded) at equal intervals with respect to the rotating main body 44 in a state where the rotating main body 44 is inserted. The mounting parts 46 and 47 are formed with blade holder mounting surfaces 41a and 41b, respectively. The mounting parts 46 and 47 are fixed (e.g., welded) to both ends in the radial direction of the plurality of connecting parts 45, respectively. The blade holder mounting surfaces 41a and 41b are formed on the outer sides in the radial direction of the mounting parts 46 and 47, respectively, and the blade holder 6 and the rotating blade 7 are fixed thereto, respectively.

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

[0029] Also, the cut part 310 carried out from the carry-out port 2a of the cutting machine 1 in this embodiment may be automatically carried to an arbitrary position by a carry-out device such as a conveyor. In this case, the carry-out direction of the cut part 310 by the carry-out device is preferably the conveying direction or the width direction.

[0030] Moreover, although two rotating blades 7 are provided in the cutting machine 1 of this embodiment, it is not limited to this, and one or three or more may be provided. When three or more rotating blades 7 are provided with respect to the rotating part 4, it is preferably fixed at equal intervals in the forward rotation direction R1 with respect to the rotating part 4.

Explanation of reference numerals

[0031] 1 Cutting machine 2 Base 3 Table 4 Rotating Part 5 Rotation Mechanism 6 Drill 7 Rotating Blade 8 Bolt for Fixing Drill Holder 9 Position Adjustment Mechanism of Drill Holder 10 Fixed Blade Unit 11 Fixed Blade 12 Operation Control Unit

Claims

1. 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 part disposed at a distance on the conveyance direction side with respect to the fixed blade, A rotation mechanism for rotating the rotating part around a rotation axis parallel to the width direction orthogonal to the conveyance direction, A rotary blade that is fixed to the rotating part in a first radial direction which is the direction fixed to the rotating part, and when viewed from the non-conveyance direction which is the direction opposite to the conveyance direction, cuts the object to be cut by passing the fixed blade in the rotation direction, Comprising, The rotary blade, Is a flat plate shape extending in the extending direction, and a blade tip is formed at an end on the tip direction side which is one of the directions orthogonal to the extending direction, The blade tip protrudes outside the rotating part, The rotary blade, When viewed from the first radial direction, the blade tip is inclined such that one end portion of the blade tip in one direction 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 part, A cutting machine characterized by the above.

2. Comprising a blade holder for detachably holding the rotary blade, The rotating part is formed with a blade holder mounting surface for mounting the blade holder on the radially outer side, The blade holder is fixed to the rotating part in a state of being mounted on the blade holder mounting surface, The rotary blade is fixed to the rotating part by being held between the blade holder mounting surface and the blade holder, The cutting machine according to claim 1, characterized by the above.

3. A plurality of the fixed blades are fixed to the rotating part at equal intervals in the rotation direction of the rotating part, The cutting machine according to claim 1 or 2, characterized by the above.

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