Circular blade for cutting, cutting device, and method for cutting a workpiece

Abstract

This round blade for slicing has a plurality of arc-shaped blade surfaces centered around a rotation center of a round blade body, the plurality of blade surfaces being arranged spaced apart on an outer circumferential section of the round blade body. A non-blade surface portion is arranged between adjacent blade surfaces in the outer circumferential section of the round blade body. An end part of a radially outer side of the non-blade surface portion is positioned more to a radially inner side than an end part of the radially outer side of the blade surface.

Description

[Technical field]

[0001] The present invention relates to a round blade for shaving, a shaving device, and a method for shaving a workpiece, for peeling meat from a workpiece such as meat with a bone. This application claims priority based on Japanese Patent Application No. 2022-078115, filed on May 11, 2022, the contents of which are incorporated herein by reference. [Background technology]

[0002] 2. Description of the Related Art In recent years, meat peeling devices (deboning devices) have been developed that mechanically peel meat from the bone of bone-in meat such as poultry thighs. This type of meat peeling device preliminarily makes cuts in the meat of the bone-in meat at appropriate positions using a cutting device, and then peels the meat from the bone using a meat separator while raising a clamper holding an end of the bone. The meat separator has scraping claws that are inserted into the cuts in the meat so as to come into contact with the outer periphery of the bone of the bone-in meat. The meat peeling device can peel the meat from the bone by raising the bone while pressing the scraping claws of the meat separator against the outer periphery of the bone of the bone-in meat.

[0003] In the case of chicken thigh meat, a knee joint is present midway along the length of the bone, and a part of the meat is firmly connected to the knee joint by tendons and fascia. For this reason, meat peeling devices for handling chicken thigh meat and the like are provided with a cutter device for cutting the tendons and fascia connecting the meat to the bone (see, for example, Patent Document 1).

[0004] The meat peeling device (deboning device) described in Patent Document 1 includes a meat separator for peeling meat from bones, and a cutter device for cutting tendons and fascia. The cutter device uses a round blade that is driven to rotate. The round blade has a uniform blade surface over the entire outer periphery. When actually peeling meat from a bone-in piece of meat, the scraping claws of the meat separator are placed in contact with the outer periphery of the bone of the bone-in meat, and the bone is raised in this state, so that the meat separator peels the meat up to a position where the tendons and fascia of the knee joint are exposed. Next, in this state, the round blade of the cutter device is brought close to the knee joint, and the round blade cuts the tendons and fascia near the knee joint. After this, the bone of the bone-in meat is further raised, so that the meat separator peels the remaining meat from the bone. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5331244 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the tendons and fascia are cut by the round blade of the cutter device in a state where the tendons and fascia are exposed by the meat separator as described above, the cutting position of the round blade needs to be accurately controlled to the millimeter in the longitudinal direction of the bone. If the cutting position of the round blade is slightly deviated from the appropriate position, excess meat will remain on the bone, reducing the yield of the meat product. In addition, depending on the cutting position of the round blade, holes may be formed on the peeled meat side, resulting in a decrease in the quality of the meat product.

[0007] As a countermeasure, a rotating round blade is lightly pressed against the outer peripheral surface of the bone, which moves relatively in the longitudinal direction, from a direction perpendicular to the longitudinal direction, and meat around the bone, including tendons and fascia, is continuously cut off. However, in this case, when trying to cut off meat by continuously rotating the round blade, the cutting edge of the round blade may bite into the cartilage or hard bone of the bone-in meat, making it difficult to continue cutting off the meat smoothly. In addition, when the cutting edge of the round blade bites into the cartilage or hard bone of the bone-in meat, the remaining bone may get into the peeled meat, and chipping may easily occur on the cutting edge of the round blade.

[0008] Aspects of the present invention provide a round blade for cutting off, a cutting device, and a method for cutting off a workpiece, which are capable of suppressing the cutting edge from biting into the core portion of the workpiece. [Means for solving the problem]

[0009] The following configurations are adopted for the scraping round blade, scraping device, and workpiece scraping method according to the present invention. The scraping blade according to the present invention is A circular blade for scraping is configured to press a circular blade body that rotates in a direction intersecting a longitudinal direction of a core portion of a workpiece against the core portion of the workpiece, and scrape off a fleshy portion of the workpiece along the core portion, The circular blade body has a circular arc-shaped blade surface centered on the center of rotation of the circular blade body and is arranged at a distance from one another on the outer periphery thereof, and non-blade surface portions are arranged between adjacent blade surfaces, and the radially outer ends of the non-blade surface portions are positioned radially inward relative to the radially outer ends of the blade surfaces.

[0010] With the above configuration, when cutting off the meat of a workpiece, the rotating circular blade body is lightly pressed against the core of the workpiece, such as the bone of a bone-in piece of meat, and the circular blade body is rotated while moving in the longitudinal direction relative to the core of the workpiece. At this time, as the circular blade body rotates, the blade surface and non-blade surface portions on the outer periphery of the circular blade body alternately face the workpiece. As a result, when the cutting edge of some of the blade surfaces tries to bite into the workpiece, the non-blade surface portion immediately releases the cutting edge, resulting in the cutting edge being prevented from biting into the core of the workpiece.

[0011] It is desirable that the radially outer edge of the non-blade surface portion be formed in a straight line connecting the circumferential ends of the cutting edges of the adjacent blade surfaces.

[0012] In this case, no concave step is created between the cutting edge and non-cutting edge portion, so chipping of the cutting edge and catching of peeled flesh when it comes into contact with a hard part of the workpiece are less likely to occur.

[0013] The scraping device according to the present invention comprises a cutter device having any one of the above-mentioned scraping round blades, The above A workpiece holder for holding a workpiece; The abovea relative movement device that moves the workpiece holding portion and the cutter device relative to each other in a cutting direction to cut off the fleshy portion; The above The cutting position operating unit is configured to move the circular cutting blade of the cutter device toward or away from the workpiece in a direction intersecting the cutting direction.

[0014] In the above configuration, when cutting off the flesh of the workpiece, the workpiece is held by the workpiece holding part, and the workpiece holding part and the cutter device are moved relatively in the cutting-off direction by the relative movement device. In this state, the cutting-off circular blade of the cutter device is rotated, and the cutting-off circular blade of the cutter device is brought close to the cutting-off portion of the workpiece by the cutting position operation part. As a result, the circular blade body of the cutting-off circular blade is pressed against the core portion of the workpiece, and the flesh of the workpiece is cut off by the circular blade body as the workpiece moves relatively in the cutting-off direction. At this time, the cutting surface and the non-blade surface portion on the outer periphery of the circular blade body alternately face the workpiece, so that the cutting edge is prevented from biting into the core portion of the workpiece.

[0015] The work may be a piece of meat on a bone with meat attached to the bone, the work holding portion may hold the bone of the meat, and the cutter device may scrape off the meat of the meat on the bone from the bone.

[0016] In this case, since there are complex joints in the bones and the cartilage and hard bones are mixed in a complex manner within the bones, it is now possible to reliably scrape off the meat from the bones of meat on the bone, which was previously thought to be difficult.

[0017] The method for cutting off a workpiece according to the present invention includes rotating any one of the above-mentioned circular cutting blades, The above The method is characterized in that the workpiece and the circular cutting blade are moved relative to each other in a cutting direction, and the circular cutting blade is displaced from a direction intersecting the cutting direction with respect to the workpiece that is moving relatively.

[0018] In this case, the scraping blade, which has cutting surfaces and non-blade surfaces arranged alternately on the outer periphery, rotates and is pressed against the workpiece moving relative to it in a direction intersecting the scraping direction. As a result, the flesh of the workpiece is easily peeled off from the core of the workpiece without the cutting edge of the scraping blade biting into the core of the workpiece.

[0019] The workpiece is a piece of meat on a bone with meat attached to the bone, and the position of the cutting blade in a direction intersecting the cutting direction may be displaced along the outer surface shape of the bone as the meat on the bone moves relatively along the longitudinal direction of the bone. Effect of the Invention

[0020] The circular blade for scraping according to the present invention has a feature that, when the circular blade body rotates, the cutting surface and non-blade surface portions on the outer periphery of the circular blade body alternately face the workpiece, thereby preventing the cutting edge from biting into the core portion of the workpiece. Therefore, when the shaving device and shaving method using the round shaving blade of the present invention are adopted, when the workpiece is meat with bones, the meat can be smoothly shaved off, which prevents a decrease in yield of the finished meat and a decrease in quality such as holes, and also prevents the blade tip from digging into the bone, causing residual bone to get mixed in with the meat, and prevents chipping of the blade tip. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a front view of a scraping device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a top view of a multiple cutter apparatus according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a top view of the scraping blade according to the embodiment of the present invention. [Figure 4] FIG. 4 is a front view showing an operating state of the scraping device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the materials, shapes, relative arrangements, and the like of the components described in the following embodiments do not limit the scope of the present invention unless otherwise specified.

[0023] Fig. 1 is a front view of a scraping device 1 according to the present embodiment. Fig. 2 is a top view of a plurality of cutter devices 12 according to the embodiment of the present invention. Fig. 3 is a top view of a scraping circular blade 15 according to the embodiment of the present invention. The shaving device 1 is a device for peeling meat from a workpiece having a meat portion (a portion to be peeled) around a core portion extending in the longitudinal direction by shaving. As an example, the shaving device 1 is used for peeling meat portion m from a bone portion b of bone-in meat 2 (workpiece) such as chicken thigh meat. In the following, chicken thigh meat, which is bone-in meat 2, will be taken as an example of a workpiece for explanation. In chicken thigh meat (bone-in meat 2), the femur b1 and tibia b2 are connected by a knee joint b3, and the ankle b4 is connected to the end of the tibia b2.

[0024] The shaving device 1 shown in FIG. 1 includes a clamper 10 (workpiece holder) that holds the ankle b4 (bone portion b) of the bone-in meat 2 facing downward, a lifting device 11 (relative movement device) that raises and lowers the clamper 10, a plurality of cutter devices 12 that work together with the lifting movement of the clamper 10 to peel off the meat portion m from the bone portion b of the bone-in meat 2 by shaving, and a cutter moving device (shaving position operating unit) 100 that moves the cutter devices 12 toward and away from the bone-in meat 2 that moves relatively in the vertical direction (shaving direction) from the horizontal direction (direction intersecting the shaving direction) (displacing the position of the cutter devices 12). In this embodiment, as shown in FIG. 2, three cutter devices 12 are arranged so as to surround the bone portion b of the bone-in meat 2 suspended by the clamper 10. However, the number of cutter devices 12 is not limited to three. The shaving device 1 shown in Fig. 1 is installed in a processing station where meat portion m is peeled off from the bone portion b of the bone-in meat 2 by shaving, and the bone-in meat 2 is transported from another processing station after completing pre-processing. In the other processing station in the previous stage, for example, incision processing is performed on the meat portion m around the ankle b4 side end of the tibia b2, and incision processing is performed on the meat portion m along the longitudinal direction of the bone b. A common clamper 10 moves between each processing station while holding the ankle b4 of the bone-in meat 2.

[0025] The clamper 10 is structured so as to be able to hold the ankle b4 of the bone-in meat 2 and release the hold. The lifting device 11 moves the bone portion b (ankle b4) of the bone-in meat 2 vertically relative to the cutter device 12 by raising the clamper 10 holding the bone portion b (ankle b4) of the bone-in meat 2 at a predetermined speed. In this embodiment, the lifting device 11 lifts the bone portion b of the bone-in meat 2 upwardly relative to the cutter device 12, whose vertical position is fixed, thereby enabling the cutter device 12 to cut off the meat portion m. In this embodiment, the lifting device 11 constitutes a relative movement device. However, it is also possible to fix the bone portion b of the bone-in meat 2 by the clamper 10 and move the cutter device 12 side downward. In this case, the device that moves the cutter device 12 downward constitutes the relative movement device.

[0026] The cutter device 12 includes a circular slicing blade 15 that rotates in a horizontal position, and a drive unit 16 that rotates the circular slicing blade 15. The drive unit 16 of each cutter device 12 is held by a corresponding cutter movement device.

[0027] The cutter moving device includes, for example, an arm section that can rotate horizontally around a drive shaft, and the cutter device 12 (drive unit 16) is held at the tip of the arm section. Each arm section of the cutter moving device horizontally moves the round cutting blade 15 of the cutter device 12 from an initial position away from the bone part b of the bone-in meat 2 to a position close to the bone part b (hereinafter referred to as the "close position"). After the round cutting blade 15 cuts the meat part m of the bone-in meat 2, the cutter moving device horizontally moves the round cutting blade 15 of the cutter device 12 to the initial position away from the bone part b of the bone-in meat 2. The cutter moving device includes an actuator (not shown), such as an air cylinder, for moving the round cutting blade 15 of the cutter device 12 between the initial position and the close position through the arm section. Either the actuator or the arm section is provided with a biasing means, such as a spring member, for biasing the cutter device 12 in the direction of the outer circumferential surface of the bone part b of the bone-in meat 2. When the three cutter devices 12 are moved to the adjacent positions by the cutter moving device, each of the shaving blades 15 surrounds the bone portion b of the bone-in meat 2 at equal intervals.

[0028] The scraping circular blade 15 shown in Fig. 3 has a circular plate-shaped circular blade body whose center is connected to the rotation shaft of the drive unit 16, and a plurality of (for example, four) arc-shaped blade surfaces 17 are arranged at a distance from each other around the rotation center o of the circular blade body on the outer periphery of the circular blade body. In addition, non-blade surface portions 18 are arranged between adjacent blade surfaces 17 on the outer periphery of the circular blade body. Each blade surface 17 is formed so that the ridgeline of the blade edge is aligned on a circumference of a constant radius around the rotation center o. In addition, the blade edge of each blade surface 17 converges toward the outside in the radial direction of the circular blade body, and is formed so that the ridgelines of the rotating blade edges are aligned in a straight line when the circular blade body is viewed from a direction perpendicular to the rotation axis. In this embodiment, the cutting edges 17 and non-cutting edge portions 18 arranged on the outer periphery of the circular blade body are alternately formed in regions that form an equal angle with respect to the center of rotation o.

[0029] Furthermore, the radially outer end of the non-blade surface portion 18 formed on the outer periphery of the circular blade body is located radially inward of the ridge portion (the radially outer end of the blade surface) of the cutting edge of the blade surface 17. Specifically, the radially outer edge of the non-blade surface portion 18 is formed in a straight line shape connecting the circumferential ends 17e of the cutting edges of the adjacent blade surfaces 17.

[0030] The shaving round blade 15 is rotated by the power of the drive unit 16, and in this state, when the outer periphery of the circular blade body is pressed horizontally against the bone portion b of the bone-in meat 2 and the meat portion m nearby it, the blade surface 17 and the non-blade surface portion 18 on 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 by the blade surface 17 and the pressing of the non-blade surface portion 18 against the bone portion b (releasing the bite of the blade surface) occur alternately.

[0031] Fig. 1 shows a state in which the meat portion m around the tibia b2 of the bone-in meat 2 is being scraped off by the shaving blade 15 of the cutter device 12. In contrast, Fig. 4 shows a state in which the meat portion m from the knee joint b3 to a part of the femur b1 of the bone-in meat 2 is being scraped off by the shaving blade 15 of the cutter device 12. Fig. 4 is a front view of the shaving device 1 similar to Fig. 1. In the state shown in FIG. 4, when the bone-in meat 2 held by the clamper 10 passes through the shaving blade 15 of the cutter device 12, the tendons and fascia around the knee joint b3 are continuously cut off by the shaving blade 15 together with other surrounding meat parts m.

[0032] Next, the process (method) of shaving off the bone-in meat 2 by the shaving device 1 will be described in detail. The bone-in meat 2 held by the clamper 10 in the lowered position has already undergone, in another processing station in the previous stage, the incision processing of the meat portion m around the ankle b4 side end of the tibia b2 and the incision processing of the meat portion m along the longitudinal direction of the bone portion b.

[0033] From this state, the clamper 10 is lifted upward by the lifting device 11, and when the cut portion on the end side of the tibia b2 of the bone-in meat 2 approaches the installation height of the cutter device 12, the cutter moving device is activated and the shaving round blades 15 of the multiple cutter devices 12 move to a position close to the bone b. At this time, the shaving round blades 15 of each cutter device 12 are rotated by the drive unit 16, and the outer periphery of the round blade body comes into contact with the outer periphery of the bone b through the cut portion of the meat m.

[0034] As the bone b continues to rise through the clamper 10 from this state, the meat m is continuously cut from the outer periphery of the bone b downwards by the rotation of the scraping blade 15. At this time, since each cutter device 12 is elastically biased toward the bone b by a biasing means (not shown), the outer periphery of the scraping blade 15 of each cutter device 12 follows the change in shape of the outer surface of the bone b and continues to abut against the bone b (the position of the outer periphery of the scraping blade 15 of each cutter device 12 is displaced following the change in shape of the outer surface of the bone b).

[0035] For example, when the bone b rises through the clamper 10 and the portion of the bone-in meat 2 near the knee joint b3 moves to the shaving blade 15 of each cutter device 12, the tendons and fascia connected to the knee joint b3 are continuously shaved off together with other meat m by the rotating shaving blade 15. The knee joint b3 has a complex outer surface shape and is a region where cartilage and hard bone are mixed, so the cutting edge of the blade surface of the rotating shaving blade 15 is likely to bite into the cartilage and hard bone of the knee joint b3. However, the circular arc-shaped blade surface 17 and the non-blade surface portion 18 whose radial end is located inside the blade surface 17 are alternately arranged on the outer periphery of the round blade body of the shaving blade 15, so that the non-blade surface portion 18 prevents the blade surface 17 from biting into the cartilage and hard bone. In this way, when the upper end portion of the femur b1 of the bone-in meat 2 rises to the height position of the shaving round blade 15 of each cutter device 12, shaving off of the meat portion m by the shaving round blade 15 is completed at that point.

[0036] As described above, in the scraping round blade 15 of this embodiment, the blade surface 17 and the non-blade surface portion 18 on the outer periphery of the circular blade body alternately face the bone-in meat 2 (workpiece) when the circular blade body rotates, so that it is possible to prevent the cutting edge from biting into the bone portion b (core portion) of the bone-in meat 2. In particular, in the scraping round blade 15 of this embodiment, the radially outer end of the non-blade surface portion 18 is positioned radially inward relative to the ridge portion (the radially outer end of the blade surface) of the cutting edge of the adjacent blade surface 17, so that at the end portion of each blade surface 17 in the rotation direction, the cutting edge of the blade surface 17 can be quickly released from biting into the bone portion b. Therefore, when the round cutting blade 15 of this embodiment is adopted, the meat portion m can be smoothly cut off, thereby suppressing a decrease in the yield of the finished meat portion m and a decrease in quality such as holes being formed, and further suppresses the mixing of residual bone into the meat portion m due to the cutting edge digging into the bone portion b and the occurrence of chipping of the cutting edge.

[0037] In addition, in the scraping round blade 15 of this embodiment, the radially outer edge of the non-blade surface portion 18 is formed in a straight line shape connecting the circumferential ends 17e of the cutting edges of the adjacent blade surfaces 17. Therefore, no concave step is formed between the blade surface 17 and the non-blade surface portion 18 on the outer periphery of the circular blade body. Therefore, when this configuration is adopted, chipping of the blade surface 17 is unlikely to occur even if the starting end or terminal end of the blade surface 17 in the rotation direction comes into contact with a hard or sharp part of a bone during rotation of the circular blade body. Furthermore, in the case of this configuration, since no concave step is formed between the blade surface 17 and the non-blade surface portion 18, when the meat portion m is shaved off by the shaving-off circular blade 15, pieces of the peeled off meat portion m are less likely to get caught on the starting end or ending end in the rotation direction of the blade surface 17. As a result, the shaving off of the meat portion m is not hindered by meat pieces piling up on the shaving-off circular blade 15, and it becomes possible to smoothly continue peeling off the meat portion m.

[0038] In addition, in the shaving device 1 of this embodiment, the cutter moving device 100, which is the shaving position operation unit, is provided with a biasing means such as a spring member that biases the shaving round blade 15 of the cutter device 12 in the direction of the bone part b of the bone-in meat 2. Therefore, when shaving off the bone-in meat 2, the outer periphery of the shaving round blade 15 is elastically pressed against the outer periphery of the bone part b with an appropriate biasing force, so that the shaving round blade 15 can smoothly follow the outer surface shape of the bone part b. The position of the outer periphery of the shaving round blade 15 of each cutter device 12 can be displaced following the change in shape of the outer surface of the bone part b. Therefore, when the scraping device 1 of this embodiment is employed, the yield of the peeled meat portion m, which is the product, can be further increased.

[0039] The use of the shaving round blade 15 of this embodiment is not limited to shaving meat 2 with bones, but can be used to shave various workpieces as long as the workpiece has a meat portion (not limited to meat) around a core portion that is harder than other parts. However, when the shaving round blade 15 is used to shave off the meat portion m of the bone-in meat 2 as in this embodiment, since there are complex joints of the bone portion b such as the knee joint b3, and the cartilage and hard bone are mixed in a complex and intricate manner in the bone portion b, it is possible to reliably shave off the meat portion m from the bone portion b, which was previously thought to be difficult.

[0040] The present invention is not limited to the above-described embodiment, and various design modifications are possible without departing from the spirit and scope of the present invention. For example, in the above embodiment, the radially outer edge of the non-blade surface portion 18 of the circular blade body is formed in a straight line connecting the circumferential ends 17e of the cutting edges of the adjacent blade surfaces 17, but the shape of the radially outer edge of the non-blade surface portion 18 is not limited to this shape. The shape of the radially outer edge of the non-blade surface portion 18 may be a non-linear shape that includes at least a curved portion or the like. However, when the radially outer edge of the non-blade surface portion 18 has a non-linear shape, it is preferable that the shape does not extend beyond the area between the straight line connecting the circumferential ends 17e of the cutting edges of the adjacent blade surfaces 17 and the imaginary circle passing through the cutting edges of the blade surfaces 17. This is particularly advantageous from the standpoint of maintaining the strength of the blade surfaces 17 and preventing pieces of meat from getting caught. [Explanation of symbols]

[0041] 1 ... shaving device, 2 ... bone-in meat (work), 10 ... clamper (work holding part), 11 ... lifting device (relative movement device), 12 ... cutter device, 15 ... shaving round blade, 17 ... blade surface, 18 ... non-blade surface part, 100 ... cutter movement device (shaving position operation part)

Claims

1. A cutting blade for cutting a fleshy portion of a workpiece along a core portion by pressing a round blade body that rotates in a direction intersecting the longitudinal direction of the core portion against the core portion of the workpiece, a plurality of arc-shaped blade surfaces are disposed at a distance from one another on an outer periphery of the circular blade body, the arc-shaped blade surfaces being centered on a rotation center of the circular blade body, and non-blade surface portions are disposed between adjacent blade surfaces; a radially outer end of the non-blade surface portion is located radially inward of a radially outer end of the blade surface, Round blade for cutting.

2. The radially outer edge of the non-blade surface portion is formed in a straight line shape connecting the circumferential ends of the cutting edges of the adjacent blade surfaces. The scraping blade according to claim 1.

3. A cutter device having the scraping blade according to claim 1 or 2; A workpiece holder for holding the workpiece; A relative movement device that moves the workpiece holding portion and the cutter device relative to each other in a cutting direction in which the fleshy portion of the workpiece is cut off; The cutting position operation unit is provided for moving the cutting circular blade of the cutter device toward or away from the workpiece moving relatively in the cutting direction in a direction intersecting the cutting direction. Cutting device.

4. The workpiece is a bone-in meat having a meat portion attached to a bone portion, The workpiece holding portion holds the bone portion of the bone-in meat, The cutter device is characterized in that it cuts the meat portion of the bone-in meat from the bone portion. The scraping device according to claim 3.

5. 3. The scraping blade according to claim 1 or 2 is rotated while the workpiece and the scraping blade are moved relative to each other in a scraping direction, The cutting blade is displaced from a direction intersecting the cutting direction relative to the workpiece that moves relatively. Method of cutting the workpiece.

6. The workpiece is a bone-in meat having a meat portion attached to a bone portion, The position of the scraping blade in a direction intersecting the scraping direction is displaced along the outer surface shape of the bone, with respect to the bone-in meat moving relatively along the longitudinal direction of the bone. The method for cutting off a workpiece according to claim 5.

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