Cutting device and cutting method of workpiece

Abstract

The slicing apparatus of the present invention includes a cutting tool assembly (12), a workpiece holding part, a relative moving part, and a slicing position operating part. The cutting tool assembly (12) has a cutting blade that is driven in a direction along the cutting edge. The workpiece holding part holds the workpiece. The relative moving part moves the workpiece holding part and the cutting tool assembly (12) relative to each other in a slicing direction that slices the flesh of the workpiece. The slicing position operating part moves the cutting blade of the cutting tool assembly (12) closer to or further away from the workpiece that is moving relative to it in the slicing direction from a direction intersecting the slicing direction. At the position where the cutting blade abuts against the workpiece, a cutting edge that cuts the workpiece along the driving direction of the cutting blade and a pressing part that presses the outer surface of the workpiece are alternately arranged.

Description

Technical Field

[0001] This invention relates to a cutting apparatus for separating meat from workpieces such as bone-in meat, and a cutting method for the workpiece.

[0002] This application claims priority based on Japanese Patent Application No. 2022-078121, filed on May 11, 2022, the contents of which are incorporated herein by reference. Background Technology

[0003] In recent years, efforts have been made to develop a meat separation device (deboning device) that uses machinery to separate the meat from the bone-in meat such as poultry leg meat.

[0004] This meat separation device utilizes a cutting device to pre-cut an incision at an appropriate location in the bone-in meat portion. While raising the clamp holding the end of the bone, a meat separator separates the meat from the bone. The meat separator has a cutting claw that inserts into the incision in the meat portion in a manner that abuts against the outer peripheral surface of the bone portion of the bone-in meat. With the cutting claw of the meat separator pressed against the outer peripheral surface of the bone portion of the bone-in meat, the meat separation device can separate the meat from the bone by raising the bone.

[0005] However, in the case of poultry leg meat, there is a knee joint in the middle of the bone along its length, and a part of the meat is firmly connected to this knee joint by its tendons or fascia. Therefore, in meat stripping devices for processing poultry leg meat, etc., there is a cutting device for cutting the tendons or fascia connecting the meat and the bone (for example, see Patent Document 1).

[0006] The meat stripping device (deboning device) described in Patent Document 1 includes: a meat separator for stripping meat from bone and a cutting device for cutting tendons or fascia. A rotary-driven circular blade is used in the cutting device. The entire outer periphery of the circular blade has the same cutting edge.

[0007] In practice, when separating meat from bone-in meat, the cutting claws of the meat separator abut against the outer circumference of the bone portion of the bone-in meat. In this position, the bone portion is raised, thereby separating the meat from the tendon or fascia at the knee joint using the meat separator. Next, in this position, the circular blade of the cutting device is brought close to the knee joint, and the circular blade is used to cut the tendon or fascia near the knee joint. Afterward, by further raising the bone portion of the bone-in meat, the remaining meat is separated from the bone using the meat separator.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent No. 5331244 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] However, as mentioned above, when tendons or fascia are exposed by the meat separator, and the tendons or fascia are cut by the circular blade of the cutting device, the cutting position of the circular blade must be accurately managed in millimeters along the length of the bone. If the cutting position of the circular blade deviates slightly from the appropriate position, excess meat will remain in the bone, reducing the yield of the finished meat product. In addition, depending on the cutting position of the circular blade, openings may sometimes be created on the side of the already separated meat, resulting in a decrease in the quality of the finished meat product.

[0013] As a countermeasure, a method was studied in which a rotating circular blade is gently pressed against the outer circumferential surface of a bone portion that moves relative to it along its length, continuously slicing the meat surrounding the bone portion containing tendons or fascia. However, in this method, if the circular blade is to be continuously rotated to slice the meat, the blade edge may bite into the cartilage or bone of the bone-in meat, making it difficult to continue slicing smoothly. Furthermore, if the blade edge cuts into the cartilage or bone of the bone-in meat, bone fragments may easily enter the detached meat, or the blade edge may be damaged.

[0014] One aspect of the present invention provides a cutting apparatus and a cutting method for preventing the cutting edge from biting into the core portion of a workpiece.

[0015] Methods for solving problems

[0016] The cutting device and workpiece cutting method of the present invention adopt the following configuration.

[0017] According to the present invention, a slicing device is characterized by comprising a cutter device, a workpiece holding part, a relative moving part, and a slicing position operating part, wherein the cutter device has a slicing blade driven in a direction along the blade surface, the workpiece holding part is used to hold the workpiece, the relative moving part causes the workpiece holding part and the cutter device to move relative to each other in a slicing direction for slicing the flesh of the workpiece, and the slicing position operating part causes the slicing blade of the cutter device to approach or move away from the workpiece relative to the workpiece moving in the slicing direction from a direction intersecting the slicing direction, and at the position where the slicing blade abuts the workpiece, a cutting edge portion that cuts the workpiece along the driving direction of the slicing blade and a pressing portion that presses the outer surface of the workpiece are alternately arranged.

[0018] In the above configuration, when cutting the flesh portion of a workpiece, the workpiece is held on a workpiece holder, and the workpiece holder and the cutting tool assembly are moved relative to each other in the cutting direction by a relative moving device. In this state, the cutting blade of the cutting tool assembly is driven in the direction along the cutting edge, and the cutting position operating unit brings the cutting blade of the cutting tool assembly close to the cutting portion of the workpiece. As a result, the cutting blade is pressed against the core portion of the workpiece, and the flesh portion of the workpiece is cut by the cutting blade as the workpiece moves relative to it in the cutting direction. At this time, among the cutting blades driven in the direction along the cutting edge, the cutting edge that cuts off the workpiece and the pressing part that presses against the outer surface of the workpiece alternately face the workpiece. Therefore, if a portion of the cutting edge is about to bite into the workpiece, the pressing part immediately following the cutting edge presses against the workpiece to release the bite, thereby preventing the cutting edge from biting into the core portion of the workpiece.

[0019] The workpiece is a piece of meat with bone attached to a bone, or it can be configured such that the workpiece holding part holds the bone of the meat with bone, and the cutting device cuts the meat of the meat with bone from the bone.

[0020] In this case, it is possible to reliably perform the operation of cutting meat from bone-in meat, which was previously considered difficult due to the presence of complex joints with intricate cartilage and bone intermingling in the bone.

[0021] According to the workpiece cutting method of the present invention, the cutting is performed by using a cutting blade at the position abutting the workpiece. The cutting blade is alternately arranged with a cutting edge for cutting the workpiece and a pressing part for pressing the outer surface of the workpiece along the driving direction. While driving the cutting blade, the workpiece and the cutting blade are moved relative to each other in the cutting direction, and the cutting blade is displaced relative to the relatively moving workpiece from a direction intersecting the cutting direction.

[0022] At this point, the cutting blade, which consists of alternating cutting edges and pressing sections, is driven at the position where it abuts the workpiece. In this state, the cutting blade presses against the relatively moving workpiece from a direction intersecting the cutting direction. As a result, the cutting edge of the cutting blade does not bite into the core portion of the workpiece, thus making it easy to peel the meat portion of the workpiece from its core portion.

[0023] The workpiece is meat with bone attached to bone. The present invention can be configured such that the position of the cutting blade in the direction intersecting the cutting direction is shifted relative to the meat with bone that moves relative to the length direction of the bone along the outer surface shape of the bone.

[0024] Invention Effects

[0025] According to the cutting apparatus and workpiece cutting method of the present invention, during the cutting of the workpiece, the cutting edge and the pressing part of the cutting blade alternately face the workpiece, thereby suppressing the biting of the cutting edge into the core part of the workpiece.

[0026] Therefore, when using the cutting device and cutting method according to the present invention, when the workpiece is meat with bone, the reduction in the yield of the meat as a product and the quality decline caused by openings can be suppressed by smoothly cutting the meat. Furthermore, the situation where residual bone is mixed into the meat or the blade is damaged due to the blade biting into the bone can be suppressed. Attached Figure Description

[0027] Figure 1 This is a front view of the cutting apparatus according to an embodiment of the present invention.

[0028] Figure 2 This is a top view of multiple cutting tool devices according to embodiments of the present invention.

[0029] Figure 3 This is a top view of the circular blade according to an embodiment of the present invention.

[0030] Figure 4 This is a front view showing the operating state of the cutting device according to an embodiment of the present invention. Detailed Implementation

[0031] In the following description, embodiments of the present invention will be described based on the accompanying drawings. Furthermore, unless otherwise specified, the scope of the present invention is not limited to the materials or shapes, relative arrangements, etc., of the constituent components described in the following embodiments.

[0032] Figure 1 This is a front view of the cutting device 1 in this embodiment. Figure 2 This is a top view of a plurality of cutting tool devices 12 according to an embodiment of the present invention. Figure 3 This is a top view of the circular blade 15 according to an embodiment of the present invention.

[0033] The slicing device 1 is used to peel meat from a workpiece in which meat (the part to be peeled) exists around a core extending along the length direction by slicing. As an example, the slicing device 1 is used to peel meat m from bone portion b of bone-in meat 2 (workpiece), such as poultry leg meat. Hereinafter, as an example of a workpiece, bone-in meat 2, i.e., poultry leg meat, will be described. In poultry leg meat (bone-in meat 2), the femur b1 and tibia b2 are connected by the knee joint b3, and the ankle b4 is connected to the end of the tibia b2.

[0034] Figure 1The cutting device 1 shown includes: a clamp 10 (workpiece holding part), a lifting device 11 (relative moving device), multiple cutting tool devices 12, and a cutting tool moving device (cutting position operation part) 100. The clamp 10 holds the bone-in meat 2 downwards and the bone mound b4 (bone b). The lifting device 11 raises and lowers the clamp 10. The multiple cutting tool devices 12, in coordination with the rising action of the clamp 10, peel the meat m from the bone b of the bone-in meat 2 through cutting. The cutting tool moving device 100 moves the cutting tool devices 12 relative to the bone-in meat 2 in the vertical direction (cutting direction) from the horizontal direction (the direction intersecting the cutting direction) to the horizontal direction (the direction intersecting the cutting direction) or away (displacing the position of the cutting tool devices 12). In this embodiment, as... Figure 2 As shown, three cutting tools 12 are arranged around the bone portion b of the meat 2 suspended on the clamp 10. However, the number of cutting tools 12 is not limited to three.

[0035] in addition, Figure 1 The slicing device 1 shown is installed at a processing station where the meat portion m is separated from the bone portion b by slicing it from the bone portion b of the bone-in meat 2. The bone-in meat 2 is transported from other processing stations after pre-processing. At the other processing stations in the previous stage, for example, cutting processing is performed on the circumferential region of the meat portion m targeting the ankle portion b4 side end of the tibia b2, and slitting processing is performed on the meat portion m along the length direction of the bone portion b. Between each processing station, a shared clamp 10 moves while holding the ankle portion b4 of the bone-in meat 2.

[0036] The clamp 10 is configured to retain the bony ankle b4 of the bone and flesh 2 and release the retention of the bony ankle b4 of the bone and flesh 2.

[0037] The lifting device 11 raises the clamp 10 holding the bone portion b (bone mound b4) of the bone-in meat 2 at a predetermined speed, thereby causing the bone portion b of the bone-in meat 2 to move relative to the cutting device 12 in the vertical direction. In this embodiment, the lifting device 11 raises the bone portion b of the bone-in meat 2 upward relative to the cutting device 12, which is fixed in a vertical position, thereby enabling the cutting device 12 to cut the meat portion m. In this embodiment, the lifting device 11 constitutes a relative movement device.

[0038] However, the clamp 10 can also be used to fix the bone portion b of the meat 2 with bone, allowing the cutting device 12 to move downwards. In this case, the device that moves the cutting device 12 downwards constitutes a relative movement device.

[0039] The cutting tool assembly 12 includes a circular cutting blade 15 (cutting blade) that rotates in a horizontal position, and a drive unit 16 that rotates the circular cutting blade 15. The drive unit 16 of each cutting tool assembly 12 is held by a corresponding cutting tool moving device.

[0040] The cutting tool moving device holds the cutting tool device 12 (drive unit 16) at the front end of an arm that can rotate horizontally about a drive shaft. Each arm of the cutting tool moving device moves the circular blade 15 of the cutting tool device 12 horizontally from an initial position separated from the bone portion b of the bone-in meat 2 to a position close to the bone portion b (hereinafter referred to as the "close position"). Furthermore, after the circular blade 15 cuts the meat portion m of the bone-in meat 2, the cutting tool moving device moves the circular blade 15 of the cutting tool device 12 horizontally to the initial position separated from the bone portion b of the bone-in meat 2. The cutting tool moving device includes an actuator (not shown), such as a cylinder, which, for example, moves the circular blade 15 of the cutting tool device 12 between the initial position and the close position via the arm. A force-applying mechanism, such as a spring member, is provided on either the actuator or the arm, which applies force to the cutting tool device 12 in the direction of the outer peripheral surface of the bone portion b of the bone-in meat 2.

[0041] In addition, when the three cutting device 12 moves to a close position using the cutting device, each circular blade 15 surrounds the bone portion b of the meat with bone 2 at equal intervals.

[0042] Figure 3 In the circular blade 15 shown, a plurality of arc-shaped cutting edges (blade surfaces) 17 are arranged at intervals around the rotation center o of the circular blade body, which is connected to the rotation axis of the drive unit 16 at its center. Additionally, pressing portions 18, which do not form cutting edges 17, are arranged between adjacent cutting edges 17 on the outer periphery of the circular blade body. The cutting edges (blade surfaces) 17 cut through the meat portion m of the bone-in meat 2 by the rotation of the circular blade body, and the pressing portions 18 press against the outer surface of the meat portion m or bone portion b of the bone-in meat 2 by the rotation of the circular blade body.

[0043] Each cutting edge 17 is formed such that the edges of each cutting edge are arranged on a circle of a certain radius centered on the rotation center o. In addition, the cutting edges of each cutting edge 17 are formed to converge radially outward toward the circular blade body, and when the circular blade body is viewed from a direction orthogonal to the rotation axis, the edges of the rotating cutting edges are formed to be arranged in a straight line.

[0044] In this embodiment, the cutting edge 17 and the pressing part 18 disposed on the outer periphery of the circular blade body are alternately formed in a region that is at an equal angle with respect to the rotation center o.

[0045] Furthermore, the pressing portion 18 formed on the outer periphery of the circular blade body has its radially outer end located further radially inward than the edge portion of the blade face 17 (the radially outer end of the blade face). Specifically, the radially outer edge of the pressing portion 18 is formed into a straight line shape connecting the circumferential end 17e of the blade face 17 of the adjacent blade face 17.

[0046] The circular blade 15 rotates under the power of the drive unit 16. In this state, when the outer periphery of the circular blade body presses down on the bone portion b and the nearby meat portion m of the bone-in meat 2 from the horizontal direction, the cutting edge 17 and the pressing portion 18 of the outer periphery of the circular blade body alternately face the direction of the bone portion b of the bone-in meat 2. Therefore, as the circular blade body rotates, the cutting of the meat portion m based on the cutting edge 17 and the pressing of the bone portion b based on the pressing portion 18 are alternately performed (releasing the bite of the cutting edge).

[0047] Figure 1 This indicates the state of cutting the meat m around the tibia b2 of the bone-in meat 2 using the circular blade 15 of the cutting device 12. In contrast, Figure 4 This indicates the state of cutting the meat portion m of the bone-in meat 2 from the knee joint b3 to the femur b1 using the circular blade 15 of the cutting device 12. Figure 4 Is with Figure 1 Front view of the same cutting device 1.

[0048] exist Figure 4 In the state shown, when the bone-in meat 2 held by the clamp 10 passes through the circular blade 15 of the cutting device 12, the tendons and fascia around the knee joint b3, together with the other meat m around it, are continuously cut by the circular blade 15.

[0049] Next, the details of the shaving process (shaving method) of bone-in meat 2 using the shaving device 1 will be explained.

[0050] The bone-in meat 2, held by clamp 10 and in a lowered position, has completed the cutting process of the meat portion m in the circumferential region of the tibia b2 at the ankle b4 side end and the splitting process of the meat portion m along the length direction of the bone portion b at other processing stations in the previous stage.

[0051] From this state, the clamp 10 is pulled upward by the lifting device 11. When the cut portion on the end side of the tibia b2 with bone and meat 2 approaches the setting height of the cutting device 12, the cutting device moves, causing the circular blades 15 of the multiple cutting devices 12 to move to a position close to the bone b. At this time, the circular blades 15 of each cutting device 12 rotate under the drive of the drive unit 16, and the outer periphery of the circular blade body abuts against the outer periphery of the bone b through the cut portion of the meat m.

[0052] If the bone portion b continues to rise from this state via the clamp 10, the meat portion m is continuously sliced ​​from the upper side downwards starting from the outer periphery of the bone portion b by the rotation of the circular blade 15. At this time, since each cutting device 12 is elastically forceped towards the bone portion b by a force-applying mechanism (not shown), the outer periphery of the circular blade 15 of each cutting device 12 continues to abut against the bone portion b following the shape change of the outer surface of the bone portion b (causing the position of the outer periphery of the circular blade 15 of each cutting device 12 to shift following the shape change of the outer surface of the bone portion b).

[0053] For example, as the bone portion b rises through the clamp 10, the portion near the knee joint b3 with bone and flesh 2 moves to the circular blade 15 of each cutting device 12. The rotating circular blade 15 continuously slices the tendons or fascia connected to the knee joint b3 along with the other flesh portion m. The knee joint b3 is a region with a complex outer surface shape and a mixture of cartilage and bone; therefore, the cutting edge of the rotating circular blade 15 easily bites into the cartilage or bone of the knee joint b3. However, because the circular blade body of the circular blade 15 is alternately arranged with arc-shaped cutting edges 17 and pressing portions 18 positioned further inward than the cutting edges 17 at its radial end, the pressing portions 18 suppress the biting of the cutting edges 17 relative to the cartilage or bone.

[0054] Thus, when the upper part of the femur b1 of the bone-in meat 2 rises to the height position of the circular blade 15 of each cutting device 12, the cutting of the meat m by the circular blade 15 ends at that moment.

[0055] As described above, the slicing device 1 of this embodiment has alternating blade surfaces (cutting surfaces) 17 on the outer periphery of the circular blade 15 (slicing blade) that abuts against the bone-in meat 2: a cutting edge surface (cutting surface) 17 for cutting the meat portion m of the bone-in meat 2; and a pressing portion 18 for pressing the outer surfaces of the meat portion m and the bone portion b of the bone-in meat 2. Therefore, when slicing the bone-in meat 2, if the rotating circular blade 15 presses against the relatively moving bone-in meat 2 in the horizontal direction, the cutting edge surface 17 of the circular blade 15 and the pressing portion 18 alternately face the bone-in meat 2. Therefore, if a portion of the cutting edge surface 17 is about to bite into the bone portion b of the bone-in meat 2, the immediately adjacent pressing portion 18 presses down on the bone portion b to release the biting, thereby suppressing the cutting edge from biting into the bone portion b.

[0056] Therefore, when the slicing device 1 of this embodiment is used, the reduction in the yield of the meat portion m as a product and the quality decline caused by openings can be suppressed by smoothly slicing the meat portion m. Furthermore, the situation where residual bone is mixed into the meat portion m or the blade is damaged due to the blade biting into the bone portion b can be suppressed.

[0057] The slicing device 1 of this embodiment uses a rotating circular blade 15 as the slicing blade for slicing the meat portion m of the bone-in meat 2. However, the slicing blade is not limited to a rotating circular blade 15; for example, it can also be a straight blade with a straight blade surface extending in a straight line and cutting the object by reciprocating motion. In this case, multiple blade surfaces and pressing portions are alternately arranged on the portion that abuts against the bone-in meat. The pressing portion is preferably a shape that is slightly concave relative to the blade surface of the adjacent blade surface, and more preferably a shape that draws a smooth arc from the end of the blade surface of the adjacent blade surface and is concave.

[0058] However, in the cutting apparatus 1 of this embodiment, a rotating circular blade 15 is used as the cutting blade, and a cutting edge 17 and a pressing portion 18 are alternately arranged on the outer periphery of the circular blade body, and the radially outer end of the pressing portion 18 is located radially inner than the cutting edge of the cutting edge 17. Therefore, smooth cutting can be performed as described above, and the cutting portion of the tool device 12 can be miniaturized.

[0059] Therefore, with this configuration, multiple cutting tools 12 are arranged around the relatively moving bone-in meat 2, which can efficiently and reliably cut the meat portion m of the bone-in meat 2.

[0060] Furthermore, in this embodiment, the pressing portion 18 of the circular blade 15 is formed as a straight line connecting the radially outer edge to the circumferential end 17e of the blade edge of the adjacent blade face 17. Therefore, no concave step is formed between the blade face 17 and the pressing portion 18 on the outer periphery of the circular blade body. Thus, with this configuration, even when the circular blade body rotates, contact with a hard or sharp portion of the bone at the beginning or end of the blade face in the direction of rotation, damage to the blade face is less likely.

[0061] Furthermore, in this configuration, since no concave step is formed between the blade surface 17 and the pressing part 18, when slicing the meat part m with the circular blade 15, fragments of the already separated meat part m are less likely to get caught at the beginning or end of the rotation direction of the blade surface 17. As a result, the slicing of the meat part m is not hindered by meat pieces accumulating on the circular blade 15, and the stripping of the meat part m can be carried out smoothly and continuously.

[0062] Furthermore, in the slicing apparatus 1 of this embodiment, the tool moving device 100, which serves as the slicing position operating unit, includes a force-applying mechanism such as a spring member. This force-applying mechanism applies force to the circular blade 15 of the tool device 12 in the direction toward the bone portion b of the bone-in meat 2. Therefore, when slicing the bone-in meat 2, the outer periphery of the circular blade 15 can be elastically pressed against the outer peripheral surface of the bone portion b using an appropriate force, so that the circular blade 15 smoothly follows the outer surface shape of the bone portion b.

[0063] Therefore, when using the slicing device 1 of this embodiment, the yield of the stripped meat portion m as a product can be further improved.

[0064] The circular blade 15 of this embodiment is not limited to cutting meat with bone 2, but can be used for cutting various workpieces, as long as there is meat (not limited to edible meat) around the core part which is harder than other parts.

[0065] However, according to this embodiment, when the circular blade 15 is used to cut the meat portion m of the bone-in meat 2, the meat portion m can be reliably cut from the bone portion b. Previously, cutting the meat portion m from the bone portion b was considered difficult because there are complex joints in the bone portion b such as the knee joint b3, and cartilage and hard bone are intricately mixed in the bone portion b.

[0066] Furthermore, the present invention is not limited to the embodiments described above, and various design changes can be made without departing from its spirit.

[0067] For example, although in the above embodiment, the radially outer edge of the pressing portion 18 of the circular blade body is formed into a straight shape connecting the circumferential end 17e of the blade edge of the adjacent blade face 17, the shape of the radially outer edge of the pressing portion 18 is not limited to this shape. The shape of the radially outer edge of the pressing portion 18 may also be a non-linear shape, at least a portion of which includes a curved portion, etc.

[0068] However, when the radially outer edge of the pressing part 18 is not linear, its shape is preferably one that does not exceed the area between the straight line connecting the circumferential end 17e of the blade of the adjacent blade surface 17 and the imaginary circle passing through the blade of the blade surface 17. In this case, it has a particularly advantageous effect from the viewpoint of maintaining the strength of the blade surface 17 and preventing meat slices from getting stuck.

[0069] Explanation of reference numerals in the attached figures

[0070] 1…cutting device;

[0071] 2…meat with bone (workpiece);

[0072] 10... Fixture (workpiece holding part);

[0073] 11... Lifting device (relative moving device);

[0074] 12... Tooling device 12;

[0075] 15... Circular blade (cutting blade);

[0076] 17...blade face;

[0077] 18…pressing section;

[0078] 100… Tool moving device (cutting position operating unit).

Claims

1. A cutting device, characterized in that, include: A cutting device having a cutting blade that is driven in a direction along the cutting edge; The workpiece holding part holds the workpiece; The relative moving device causes the workpiece holding part and the cutting tool device to move relative to each other in the cutting direction in which the meat of the workpiece is cut. as well as The cutting position operating unit causes the cutting blade of the tool assembly to approach or move away from the workpiece, which is moving relative to the cutting direction, in a direction intersecting the cutting direction. At the position where the cutting blade abuts against the workpiece, there are alternately arranged cutting edges that cut the workpiece along the driving direction of the cutting blade and pressing portions that press the outer surface of the workpiece.

2. The cutting device according to claim 1, characterized in that, The workpiece is meat with bone attached to bone. The workpiece retaining part holds the bone portion containing the flesh and bone. The cutting device cuts the meat portion with bone from the bone portion.

3. A method for cutting a workpiece, characterized in that, At the point of contact with the workpiece, a cutting blade with a cutting edge that cuts the workpiece and a pressing part that presses against the outer surface of the workpiece is used, arranged alternately along the driving direction. While driving the cutting blade, the workpiece and the cutting blade move relative to each other in the cutting direction. The cutting blade is displaced relative to the relatively moving workpiece from a direction intersecting the cutting direction.

4. The workpiece cutting method according to claim 3, characterized in that, The workpiece is meat with bone attached to bone. The position of the cutting blade in the direction intersecting the cutting direction is shifted relative to the bone-bone meat, along the outer surface shape of the bone portion, as the bone portion moves relative to the length direction of the bone portion.

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