JPH0813233B2 - A device that inserts streaks along the bones of chicken leg with bones - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for streaking bones on a chicken thigh along a bone.

[0002]

2. Description of the Related Art In the case of manually separating chicken thigh meat with bones into bone and meat, the separation work is performed according to the following procedure.
Done with a knife. (1) Cut the thigh meat with bone along the femur and the lower leg. (2) The knee joint is cut and the femur and the lower leg are separated. (3) Raise the lower end of the femur, that is, the knee joint, and peel off the femur from the thigh. (4) Make a cut around the ankle of the thigh, and then
Peel the thigh around the lower leg from the lower leg, from the malleolus along the lower leg to the knee joint. (5) Cut the tendon that connects the knee joint with the flesh.

[0003]

Since all of the above works (1) to (5) require skill and physical strength, automation has been conventionally demanded. The present invention provides a conventional device for automatically inserting the bone-in leg of a poultry chicken into a bone and the step (1) of separating the meat into the meat, which is a device for streaking along the bone-in bone of a poultry bird. The purpose is to provide.

[0004]

In the present invention, in order to solve the above-mentioned problems, a first blade having a wedge-shaped horizontal cross section and a vertically extending cutting edge, and a protrusion from the cutting edge of the first blade are provided. A second cutting blade having a cutting blade that is arranged along the first side surface of the first cutting blade, and a first driving means that vertically reciprocates the second cutting blade with respect to the first cutting blade. A flesh cutting means for cutting, a pressing means for pushing the flesh with bone toward the second side surface of the first blade of the flesh cutting means, and a second means for engaging and disengaging the meat even if the flesh cutting means is moved up and down Drive means,
Third driving means for horizontally moving the meat cutting means, and even if the first and second blades of the meat cutting means are offset laterally in the horizontal movement direction of the meat cutting means, the meat cutting means is fixed to the meat cutting means and extends vertically. An existing shaft member, a first spring that applies an initial rotation moment to the shaft member to urge the shaft member to rotate, and a stopper that restricts rotation of the shaft member due to the initial rotation moment, When the force applied to the cutting edge of the first blade is less than or equal to a predetermined value, rotation of the shaft member is regulated, and when the force applied to the cutting edge of the first blade exceeds the predetermined value, rotation control means for allowing rotation of the shaft member. And a forced rotation means for forcibly rotating the shaft member when the meat cutting means reaches a predetermined horizontal position, and a cam mechanism including a fixed cam and a cam follower fixed to the shaft member. A poultry bird characterized by To provide a device for putting streaks along the bone of the bone with a thigh.

Further, according to the present invention, the first blade having the first blade having the wedge-shaped horizontal cross section and the vertically extending cutting blade, and the first blade having the cutting blade protruding from the cutting blade of the first blade A second blade arranged along the side surface, and a first drive means for reciprocally driving the second blade up and down with respect to the first blade; a meat cutting means for cutting the thigh meat; First thigh meat cutting means
A pressing means for pressing the blade toward the second side surface and a second means for engaging and disengaging the meat even when the meat cutting means is moved up and down.
The driving means, the third driving means for moving the meat cutting means horizontally, and the first blade and the second blade of the meat cutting means are fixed to the meat cutting means even if they are offset laterally in the horizontal movement direction of the meat cutting means. A shaft member extending in the vertical direction, a first spring that applies an initial rotation moment to the shaft member to urge the shaft member to rotate, and a stopper that restricts rotation of the shaft member due to the initial rotation moment, When the force applied to the cutting blade of the first blade of the thigh meat cutting means is below a predetermined value, the rotation of the shaft member is restricted, and when the force applied to the cutting blade of the first blade exceeds the predetermined value, the rotation of the shaft member is allowed. The cutting blade of the first blade and the cutting blade of the second blade of the thigh meat cutting means are arranged in the moving direction from the front to the rear in the moving direction when the thigh meat cutting means horizontally moves in a state of engaging the thigh meat. It is formed so that it is inclined diagonally downward toward To provide a device for putting streaks along the bone of a bone with thigh poultry characterized by.

Further, in the present invention, a first blade having a wedge-shaped horizontal cross section and a vertically extending cutting blade, and a first blade having a cutting blade protruding from the cutting blade of the first blade are provided. A second blade arranged along the side surface, and a first drive means for reciprocally driving the second blade up and down with respect to the first blade; a meat cutting means for cutting the thigh meat; The pressing means for pressing the first side of the first blade of the thigh meat cutting means, the second driving means for engaging and disengaging the meat even when the thigh meat cutting means is moved up and down, and the thigh meat cutting means for horizontally moving A third driving means, a shaft member which is fixed to the meat cutting means and extends in the vertical direction even when offset from the first blade and the second blade of the meat cutting means to the lateral direction of the horizontal movement direction of the meat cutting means; A first spring that applies an initial rotational moment to the shaft to urge the shaft member to rotate; And a stopper for restricting the rotation of the shaft member due to the rotational moment of rotation, and restricting the rotation of the shaft member and cutting the first blade when the force applied to the cutting blade of the first blade of the thigh cutting means is less than a predetermined value. Rotation regulating means for allowing rotation of the shaft member when the force applied to the blade exceeds a predetermined value, and braking means for reducing the horizontal moving speed of the thigh meat cutting means after the time when the thigh meat cutting means reaches the predetermined horizontal position, The present invention provides a device for streaking along a bone of a chicken thigh with a bone of a feeding bird.

[0007]

In the streaking device according to the present invention, the operation of the rotation restricting means causes the first blade to rotate according to the reaction force from the meat added to the cutting blade of the first blade of the meat cutting means,
The second side of the first blade always snuggles against the side of the lower leg and the side of the femur. A second blade guided by the first side surface of the first blade having a wedge-shaped horizontal cross section is reciprocally driven up and down by the first driving means so that the cutting blade is always brought into contact with the side surface of the lower femur and the side surface of the femur. While cutting the meat. At the position near the knee joint, the first blade is forcibly rotated by the forced rotation means. As a result, the second side surface of the first blade surely leans against the side surface of the crus even at the position near the knee joint where the curvature of the side surface of the crus rapidly increases. Further, in the streaking device according to the present invention,
The thigh meat cutting means includes a first blade cutting blade and a second blade cutting blade that are formed to incline obliquely downward from the front to the rear in the moving direction when the thigh meat cutting means horizontally moves in a state of engaging with the thigh meat. Is cut down while being pressed downward. As a result, when the meat is cut open while the cutting blade of the first blade and the second blade move horizontally, the meat rises in front of the cutting blade of the first blade and the cutting blade of the second blade in the horizontal movement direction. It is possible to prevent a situation that obstructs the opening work. Further, in the streaking device according to the present invention, the horizontal movement speed of the thigh meat cutting means is increased by the operation of the braking means so that
It lowers after the blade protrudes into the thigh near the knee joint.
Therefore, the distance by which the first blade and the second blade of the meat cutting means move horizontally is short even when the thigh near the knee joint is projected into the meat and then leans back to the knee joint again.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The device for streaking the chicken thigh along the bone of the poultry meat according to the present embodiment includes a thigh meat transporting device A and a stinging device B. Hereinafter, each device will be described. In the following description, the arrows I, II, III, IV, V of FIG.
The directions of VI and V are called front, back, left, right, up, and down, respectively.

(1) Thigh Meat Conveying Device A The thigh meat conveying device A will be described with reference to FIG. In FIG. 1, reference numeral 2 denotes an endless chain that extends in the left-right direction and is driven by a motor (not shown).
01 is driven to the left. As shown in FIG. 1, the endless chain 2 has a plurality of bone-attached thigh meat gripping assemblies 3 fixed at predetermined intervals. The thigh meat gripping assembly 3 has a rectangular parallelepiped main body 301, and the main body 301 is fixed to the endless chain 2 by a suitable mounting jig. The shaft member 302 penetrates the main body 301 and extends in the front-rear direction. The shaft member 302 is supported by the main body 301 so as to be rotatable about its axis and immovable in the direction of the axis. The shaft member 302 is rotatably but closely fitted in a hole formed in the main body 301. Therefore, the shaft member 302 rotates only when it receives a large rotational torque. At the rear end of the shaft member 302, a first gripping member 3 formed of a groove-shaped member having a U-shaped groove extending forward and backward and having a closed front end.
03 is fixed.

At the front end of the shaft member 302, the cam plate 3
04 is fixed. A pair of cam rollers 305 is attached to the front surface of the cam plate 304, and a pair of cam rollers 306 is attached to the rear surface of the cam plate 304 so as to be orthogonal to the cam rollers 305. The pair of cam rollers 305 is disposed in the upper front part of the upper traveling portion 201 of the endless chain 2 near the starting end thereof, is fixed to the frame of the streaking device B (not shown), and extends in the left-right direction.
01 is engaged. With the pair of cam rollers 305 engaged with the line cam 401, the U of the first gripping member 303 is
The mold groove has an open end facing upward. First grip member 30
The state in which the open end of the U-shaped groove of 3 faces upward is hereinafter referred to as the open state of the gripping assembly 3.

The line cam 401 extends only near the start end and the end of the upper traveling portion 201 of the endless chain 2. A line cam 402 fixed to the frame of the streaking device B (not shown) extends in the left-right direction above the center of the upper traveling portion 201 of the endless chain 2. The line cam 402 engages with the pair of cam rollers 306.
With the line cam 402 engaged with the pair of cam rollers 306, the open end of the U-shaped groove of the first grip member 303 faces leftward. The state in which the open end of the U-shaped groove of the first grip member 303 faces leftward is hereinafter referred to as the closed state of the grip assembly 3. A second grip member 307 is arranged behind the main body 301. The second grip member 307 is provided with a U-shaped notch 308 having an open upper end, which faces the U-shaped groove of the first grip member 303 when the grip assembly 3 is in the open state. The width of the U-shaped notch 308 of the second grip member 307 is formed to be slightly narrower than the U-shaped groove of the first grip member 303.

(2) Stitching device B The streaking device B will be described with reference to FIGS. 1 to 8. The streak inserting device B described below is configured as a streak inserting device for the boned leg of the left leg. As shown in FIG. 1, a rectangular plate-shaped table 5 extending in the left-right direction is horizontally arranged behind the thigh meat gripping assembly 3. The table 5 is fixed to the framework of the streaking device B (not shown). As shown in FIG. 1, a cutter assembly 6 is disposed above the meat gripping assembly 3 near the right end of the line cam 402. The cutter assembly 6 includes an air cylinder 601 oriented vertically. The air cylinder 601 is fixed to a bracket 602 supported by a frame of the streaking device B (not shown) so as to be movable only in the front-rear direction. An air cylinder 603 is directed in the front-rear direction and is fixed to a frame (not shown) of the streaking device B. A piston extending rearward of the air cylinder 603 is connected to the bracket 602. An upper end of a rectangular cutter base 604 is connected to a lower end of a piston extending below the air cylinder 601.
The cutter base 604 is supported by a guide 605 fixed to the bracket 602 so as to be vertically movable. A rotary shaft 606, which is arranged on the right side of the cutter base 604 and extends vertically, is supported by the cutter base 604 by two bearings (not shown) so as to be rotatable only around its axis.

As shown in FIG. 2, a ring 607 is fitted and fixed to the top of the rotary shaft 606. An arm 608 fixed to the ring 607 is connected to an L-shaped member 610 fixed to the cutter base 604 via a spring 609. The rotating shaft 606 is rotationally biased by the spring 609 around the axis thereof with the initial moment M ₀ in the direction of the arrow α, that is, in the clockwise direction when viewed from above. When the stopper 611 abuts the L-shaped member 610, the rotation of the rotating shaft 606 in the direction of arrow α is restricted. Below the ring 607, the ring 612 is
6 is fitted and fixed. The ring 612 includes an arm 6
13 and the stopper 614 are fixed. Ring 6
The ring 615 is rotatably and immovably fitted to the rotating shaft 606 so as to abut the lower surface of the shaft 12. An arm 616 and a stopper 617 are fixed to the ring 615. The arm 616 is connected to the arm 613 via a spring 618. Ring 615 is spring 6
18 is rotationally biased in the direction of arrow β, that is, counterclockwise when viewed from above. Since the arm 616 contacts the stopper 614, the rotation of the ring 615 in the arrow β direction is restricted.

Below the ring 615, a ring 619 is fitted and fixed to the rotating shaft 606. An arm 620 and a stopper 621 are fixed to the ring 619. The ring 622 comes into contact with the lower surface of the ring 619, and
It is fitted to the shaft so as to be rotatable and immovable in the axial direction. The ring 622 includes an arm 623 and a cam follower 6.
24 and 24 are fixed. The arm 623 is connected to the arm 620 via a spring 625. Ring 622
Is urged to rotate by a spring 625 in the direction of arrow β, that is, counterclockwise when viewed from above. When the arm 623 abuts on the stopper 621, the ring 622 is
The rotation in the direction of the arrow β is restricted. As shown in FIG. 1, a plate member 626 is fixed to the lower end of the rotary shaft 606. On the lower surface of the plate member 626, the upper end of the cutter mounting shaft 627 is fixed by being offset to the right from the rotating shaft 606, and the cutter mounting bracket 628 is fixed to the lower end of the cutter mounting shaft 627.
An upper end of a cutter body 629 is fixed to the shaft 28 by being offset forward from the cutter mounting shaft 627. The cutter body 629 is made of a rectangular plate, and the fixed blade 630 is fixed to the lower end.

As shown in FIG. 3, the fixed blade 630 has a wedge-shaped horizontal sectional shape, and a cutting edge 630 'is formed at the trailing edge. The cutting blade 630 'is formed to be inclined obliquely downward from the rear to the front, and the lower end of the fixed blade 630 is formed to be inclined obliquely downward from the front to the rear. Therefore, the rear end of the lower end of the fixed blade 630 forms a point 630 ″. The rectangular plate portion formed on the top of the fixed blade 630 is fixed to the rear surface of the cutter body 629. The rectangular plate portion is the fixed blade. It extends to the right beyond the right side surface of 630. A motor 631 is attached to the cutter body 629 as shown in Fig. 1. Below the motor 631,
A shaft 632 penetrates the cutter body 629 back and forth and is supported by the cutter body 629 so as to be rotatable around its axis. The shaft 632 is connected to the motor 63 via the belt 633.
1 is connected to the output shaft. A pin 634 that is eccentric from the axis and extends rearward is fixed to the rear end of the shaft 632, and a rod 635 that extends downward is supported at the rear end of the pin 634 so as to be rotatable around the axis of the pin 634. A pin 636 extending in the front-rear direction is supported by the lower end of the rod 635 so as to be rotatable about its axis, and a rod 637 extending downward is supported by the pin 636 so as to be rotatable about its axis. The rod 637 is supported by a guide 638 fixed to the cutter body 629 so as to be vertically movable. A movable blade fixing block 639 is fixed to the lower end of the rod 637.

As shown in FIG. 3, a movable blade 64 made of a narrow rectangular thin plate is inserted in a slit formed in the lower end of the block 639 and extending in the front-rear direction.
0 is fixed in block 639. Block 63
9 is positioned so that its front surface abuts on the rear surface of the rectangular plate portion of the fixed blade 630. The movable blade 640 is positioned so as to contact the right side surface of the fixed blade 630. A cutting edge 640 'is formed at the trailing edge of the movable blade 640. The cutting edge 640 'is formed so as to incline obliquely downward from the rear to the front. The lower end of the movable blade 640 is formed to incline obliquely downward from the front to the rear. Therefore, the rear end of the lower end of the movable blade 640 forms a sharp edge 640 ″. The movable blade 640 has a fixed cutting blade 630 ′ when the cutting blade 640 ′ has a maximum downward stroke.
It is positioned so as to slightly project downward and rearward from.

The rotary shaft 606 is rotated biased with an initial moment M ₀ in the arrow α direction in FIG. 2, the stopper 611
Is in contact with the L-shaped member 610, and the rotation of the rotating shaft 606 in the direction of the arrow α is restricted, the movable blade 640 moves toward the rotating shaft 6.
06 to the right of the rotary shaft 606 and slightly behind the rotary shaft 606. Further, in this state, the movable blade 640 is slightly inclined leftward from the front edge toward the rear edge when viewed from above. Further, in this state, the left side surface of the fixed blade 630 extends in the front-rear direction. In the following description, the rotating shaft 606 is urged to rotate in the direction of the arrow α in FIG. 2 with the initial moment M ₀ , the arm 611 abuts the L-shaped member 610, and the rotation of the rotating shaft 606 in the direction of the arrow α is restricted. The movable blade 640 is the rotating shaft 6.
06 to the right and slightly behind the rotary shaft 606, the movable blade 640 slightly tilts leftward from the front edge to the rear edge when viewed from above, and the left side surface of the fixed blade 630 moves forward and backward. The state extending in the direction is called the initial rotation state of the movable blade 640.

As shown in FIGS. 1 and 2, the cutter body 62.
A cam plate 7 extending in the front-rear direction is arranged above the plate 9. The cam plate 7 is formed with an elongated hole 701 extending in the front-rear direction. The cam plate 7 has an elongated hole 70
By fixing a bolt (not shown) engaging with 1 to the frame of the streaking device B (not shown), it is fixed to the frame of the sting device B (not shown). Cam plate 7
The left side edge of the projection 702 protruding leftward at the center thereof
However, a protrusion 703 protruding leftward is formed at the rear end.

As shown in FIG. 1, the pressure roll assembly 8 is disposed to the left of the fixed blade 630. As shown in FIG. 4, the pressure roll assembly 8 includes a pressure roll 802 rotatably supported by a shaft 801 extending in the left and right directions. The shaft 801 is fixed to the lower end of a vertically extending strip 803, the upper end of the strip 803 is bent to the right and fixed to the rear end of the bracket 804, and the front portion of the bracket 804 extends to the upper left. It is fixed to the cutter base 604. The rod 805 penetrates through the central portion of the strip 803.
Extends in the left-right direction, and the right end of the rod 805 is the bracket 8
It is fixed at 04. A coil spring 806 is externally fitted to a portion of the rod 805 extending to the left of the strip plate 803, and the spring 806 is compressed and biased by a nut 807 screwed to the left end of the rod 805.

As shown in FIG. 1, a cutter guide 9 is arranged in front of the cutter assembly 6 and above the meat gripping assembly 3. As shown in FIGS. 5 and 6, the cutter guide 9 has a pair of L-shaped legs 901 which are arranged adjacent to each other on the left and right sides and whose rear portions are bent downward. A shaft member 902 extending upward is fixed to a front portion of the leg 901, and the shaft member 902 serves as the base plate 90.
It is supported by 3 so as to be rotatable around its axis.
A pair of guide plates 904 are fixed to the rear portion of the leg 901 that is bent downward. The pair of guide plates 904 cooperate to form a V-shaped guide groove 905, a slit 906 extending downward from the guide groove 905, and a wide rectangular groove 907 extending below the slit 906. The rectangular groove 907 is formed eccentrically to the left with respect to the slit 906. The leg 901 is urged by a spring 908 to rotate about the shaft member 902 in the direction in which the rear portions approach each other. The stopper 909 fixed to the leg 901 comes into contact with the stopper receiver 910 fixed to the base plate 903, so that the leg 90
The rotation of 1 is restricted, and the formation of the slit 906 is guaranteed. The cutter guide 9 is positioned so that the horizontal position of the slit 906 is the same as the horizontal position of the fixed blade 630 of the cutter assembly. Cutter guide 9
Are reciprocally driven up and down by a driving device (not shown). As shown in FIG. 1, a cutter assembly guide 605.
A hydraulic braking device 10 in which an oil cylinder and an air-hydraulic converter are connected via a flow control valve is provided in the rear of the.

The operation of the device for streaking along the bones of the chicken thigh with bone according to the present embodiment having the above-mentioned structure will be described below. Turn on the power of the device for streaking along the bone. Thereby, the upper traveling portion 201 of the endless chain 2
Will drive to the left. The piston of the air cylinder 601 is in the retracted position, and the cutter body 629 is pulled upward. The piston of the air cylinder 603 is in the retracted position and the cutter body 629 is above the thigh gripping assembly 3. Rotation axis 606 is rotated biased with an initial moment M ₀ in the direction of arrow α in Figure 2, the stopper 611
Contacts the L-shaped member 610, and the movable blade 640 moves the rotary shaft 60.
6 to the right of the rotary shaft 606, the movable blade 640 inclines slightly to the left from the front edge to the rear edge when viewed from above, and the left side surface of the fixed blade 630 moves forward and backward. Extending in the direction. That is, the movable blade 640 is in the initial rotation state. The cutter guide 9 is located in front of the cutter assembly 6 and above the meat gripping assembly 3.

Next, in FIG. 1, the worker sets the boned thigh meat S of the left leg on the gripping assembly 3 located near the right end of the upper traveling portion 201 of the endless chain 2. The gripping assembly 3 is in the open state, and the open end of the U-shaped groove of the first gripping member 303 faces upward. The setting of the boned thigh meat S is performed by the following procedure. The inner surface of the thigh meat S faces the right side, the outer surface faces the left side, and the boned thigh meat S is positioned so that the knee joint S4, which is the connecting portion between the femur S2 and the lower thigh bone S1, projects upward. . The ankle S3 in the U-shaped groove of the first grip member 303,
Further, the portion of the lower leg bone S1 adjacent to the ankle S3 is inserted into the U-shaped notch 308 of the second grip member 307, respectively. As a result, the ankle S3 of the boned thigh S is grasped by the first grasping member 303, and the part of the lower leg bone S1 adjacent to the ankle S3 is grasped by the second grasping member 307.

As shown in FIG. 1, the bone leg thigh S of the left leg set in the gripping assembly 3 as described above is driven to the left by the upper running portion 201 of the endless chain. It moves to the left along with. The cam roller 305 and the line cam 40 are moved along with the movement of the grip assembly 3 to the left.
The engagement with 1 is released, and the cam roller 306 and the line cam 402 are engaged. Thereby, the first grip member 303
Rotates to the left and the gripping assembly 3 is closed. First
Along with the rotation of the grip member 303, the boned meat and meat S of the right leg gripped by the first grip member 303 also rotate to the left,
The inside of the thigh faces upward, and the outside of the thigh abuts the upper surface of the table 5. At this time, the femur S2, the crus S1 and the ankle S3 are in the same horizontal plane, and the crus S1 inclines slightly leftward from the front to the rear when viewed from above, and the femur S2 is viewed from above. It slightly inclines to the right from front to back. The open end of the U-shaped groove of the first gripping member 303 faces leftward, and the U-shaped notch 30 of the second gripping member 307.
Since the open end of 8 faces upward, the ankle S3 with bones cannot be separated from the grip by the first grip member 303 and the second grip member 307 in the vertical and horizontal directions. Further, the width of the U-shaped notch 308 of the second grip member 307 is formed to be narrower than the width of the U-shaped groove of the first grip member 303, and the ankle S3 of the boned meat is the second grip member 3.
Since the U-shaped notch 307 of No. 07 cannot pass back and forth, the ankle S3 of the boned thigh is the first gripping member 3
03 and the second grip member 307 cannot be detached in the front-back direction. However, the first gripping member 3
The width of the U-shaped groove 03 is wider than the width of the ankle S3, and the width of the U-shaped notch 308 of the second gripping member 307 is set wider than the width of the portion of the lower femur S1 adjacent to the ankle S3. Therefore, the boned thigh S can rotate to the left and right to some extent with the ankle S3 as the center of rotation.

After the thigh meat gripping assembly 3 is closed, the thigh meat gripping assembly 3 is further moved to the left side, and the right side of the notch 308 of the second gripping member 307 is the movable blade 640, and thus the fixed blade 630. When the same horizontal position is reached, the endless chain 2 stops and the leftward movement of the gripping assembly 3 also stops. Then, the cutter guide 9 is moved downward, and the guide plate 904 is lowered to the position immediately behind the second gripping member 307 of the meat gripping assembly. As shown in FIG. 6, the rectangular groove 907 of the cutter guide is
Accept the part adjacent to the ankle of 1. The piston of the air cylinder 601 that was in the retracted position advances, and the motor 631 operates. As the piston of the air cylinder 601 moves forward, the cutter base 604 and eventually the cutter body 629 move downward. Cutter base 6
With the downward movement of 04, the pressure roll assembly 8 and thus the pressure roll 802 also move downward. Also, the motor 6
By the operation of 31, the shaft 632 rotates via the belt 633, the eccentric pin 634 rotates with the rotation of the shaft 632, the rod 637 reciprocates up and down via the rod 635 and the pin 636, and eventually the movable blade. 640 reciprocates up and down.

As shown in FIG. 6, the tip 630 ″ of the fixed blade 630 that has moved downward is guided by the guide groove 905 and the slit 906 of the cutter guide 9, and the vicinity of the lower thigh bone S1 adjacent to the ankle S3. Then, the boned thigh is pierced into the meat S. As described above, the movable blade 640, and thus the fixed blade 630, is in the same horizontal position as the right end of the notch 308 of the second grip member 307, and the boned thigh is the lower thigh bone. Since S1 is inclined slightly leftward from the front toward the rear, the position where the tip 630 ″ of the fixed blade pierces the boned thigh meat S is on the right side of the lower thigh bone S1 and in the vicinity of the lower thigh bone S1. At this time, the pressing roll 802 contacts the boned leg meat S from the left side of the movable blade 640 and the left side of the lower leg bone S1, and presses the boned leg meat S to the right. This makes the thigh meat with bones S
With the ankle S3 as the center of rotation, the hip joint S5 rotates rightward, that is, in the direction in which the hip joint S5 moves to the right. Thigh meat with bone S
As a result of rotating to the right around the ankle S3 as the center of rotation, the crus S1 that was inclined slightly to the left from the front to the rear extends substantially in the anterior-posterior direction, and the tip 630 ″ of the fixed blade. Comes into contact with the right side surface of the lower leg S1. At the time when the tip 630 ″ of the fixed blade bites the bone S into the meat S, the piston of the air cylinder 601 reaches the advanced position, and the tip 630 ″ of the fixed blade reaches the height. The movable blade 640 is in the initial rotation state, and the left side surface of the fixed blade 630 extending in the anterior-posterior direction leans against the right side surface of the lower leg B1 extending in the anterior-posterior direction.

As shown in FIG. 7A, the air cylinder 6
03 piston moves forward, and the cutter assembly 6 moves backward. Accordingly, the meat S is cut open even when the movable blade 640 reciprocates up and down while being guided by the right side surface of the fixed blade 630. The cutting edge 640 'of the narrow movable blade 640 slightly tilted leftward from the front edge to the rear edge when viewed from above contacts the right side surface of the lower thigh bone S1 and is adjacent to the right side surface of the lower thigh bone S1. The meat S is cut open even at the part to be opened. The cutting edge 640 ′ of the movable blade 640 that abuts the lower leg bone S1 is the cutting edge 6 of the fixed blade 630.
There is no possibility that the cutting blade 640 'of the movable blade bites into the lower thigh bone S1 and scrapes the bone when the meat S is cut open because it only slightly projects downward and rearward from 30'. When the cutter assembly 6 moves rearward, the meat S is cut open by the movable blade 640 along the right side surface of the crus S1 extending in the anterior-posterior direction, and the cut edge is greatly expanded by the wedge-shaped fixed blade 630. . Since both the fixed blade cutting blade 630 'and the movable blade cutting blade 640' are inclined obliquely downward from the rear toward the front, the thigh S is cut open while being pressed downward. As a result, when the fixed blade 630 and the movable blade 640 are moved rearward and the meat S is cut open, the meat rises behind the fixed blade cutting blade 630 ′ and the movable blade cutting blade 640 ′ to perform the cutting operation. Obstacles are prevented, and smooth cutting work is guaranteed. During the above streaking, the fixed blade cutting edge 630 'receives a forward resistance force from the meat. Since the movable blade 640, and thus the fixed blade 630, is offset rightward with respect to the rotating shaft 606, this resistance force causes the rotating shaft 606 to move toward the rotating shaft 606.
A resistance moment in the direction opposite to the direction of the arrow α in FIG. 2 is applied. However, since the resistance force from the meat is small, the rotating shaft 6
The resistance moment applied to 06 is the initial moment M
Does not exceed ₀ . Therefore, the movable blade 640 is held in the initial rotation state.

As shown in FIG. 7B, when the cutter assembly 6 moves further rearward, the portion of the lower leg bone S1 adjacent to the knee joint S4 comes into contact with the left side surface of the fixed blade 630. In the region adjacent to the knee joint S4, the right side surface of the lower leg bone S1 is curved rightward from the front to the rear, so that when the movable blade 640 is held in the initial rotation state, the left side of the fixed blade 630 is left. The surface has an angle with the right side surface of the lower leg S1. Therefore, a forward resistance force is applied to the fixed cutting blade 630 'from the lower leg bone S1. This resistance is greater than the resistance from meat. Thus, the forward resistance force from the lower leg S1 causes a resistance moment exceeding the initial moment M ₀ , and the rotation shaft 606 rotates in the direction opposite to the direction of the arrow α in FIG. 2 against the biasing force of the spring 609. To do. Along with this, the fixed blade 630 and the movable blade 640 also rotate and move to the right front position of the rotation shaft 606. In addition, the fixed blade 630
When viewed from above, the left side surface of the is inclined rightward from the front edge to the rear edge. As a result, the left side surface of the fixed blade 630 again approaches the right side surface of the lower leg B1 that curves to the right. As a result, the leg S along the right side of the lower leg S1
Opening and expanding work can be continued without any problems. When the cutter assembly moves rearward, the lower leg S1
Receives a force to the left from the fixed blade 630. Due to this force, the thigh meat with bone S is centered around the ankle S3 as shown in FIG.
In (b), it rotates clockwise, and the part of the lower leg bone S1 adjacent to the knee joint S4 moves to the left. By this movement to the left, the part of the lower leg bone S1 that is inclined rightward from the front to the rear and adjacent to the knee joint S4 can pass between the fixed blade 630 and the pressing roll 802 without any trouble.

As shown in FIG. 7 (c), when the cutter assembly 6 moves further rearward and the fixed blade 630 reaches the position closest to the knee joint S4, the cam follower 624 causes the protrusion 702 of the cam plate 7. Engage with. Cutter assembly 6
When the skeleton moves further rearward, a forward force is applied to the cam follower 624 from the projection 702, and the ring 622 is moved to the position shown in FIG.
Rotate in the direction of arrow β. With the rotation of the ring 622, the stopper 621 contacts the arm 623 of the ring 622, and the ring 619 rotates in the direction of arrow β in FIG.
Consequently, the rotary shaft 606 rotates in the direction of arrow β in FIG. 2, that is, in the direction opposite to the direction of arrow α. At the position closest to the knee joint S4, the curvature of the right side surface of the lower leg bone S1 sharply increases. Therefore, the rotation of the rotating shaft 606 due to the increase in the forward resistance force applied from the lower leg bone S1 to the cutting blade 630 'of the fixed blade. The increase in the angle cannot catch up with the increase in the curvature of the right side surface of the lower leg bone S1, and the movable blade 640 may bite into the lower leg bone S1 to scrape the bone. However, as described above, in this embodiment,
When the fixed blade 630 reaches the position closest to the knee joint S4, the rotating shaft 606 is forcibly rotated by the cam mechanism. As a result, the rotation angle of the rotation shaft 606 also rapidly increases in accordance with the rapid increase in the curvature of the right side surface of the lower leg S1.
This prevents a situation in which the movable blade 640 bites into the lower leg bone S1 and scrapes the bone at the position directly adjacent to the knee joint of the lower leg bone S1. The longitudinal position of the cam plate 7 is 701.
It can be adjusted by changing the engagement position between the elongated hole 701 and a bolt (not shown) that engages with. As a result, the position at which the rotating shaft 606 is forcibly rotated can be adjusted according to the average size of the boned thigh to be processed. Cam follower 624 and cam plate projection 70
When the rotary shaft 606 rotates in the direction of arrow β in FIG. 2 due to the engagement with the ring 2, the ring 612 also rotates integrally with the rotary shaft 606. As the ring 612 rotates, the spring 618
The ring 615 rotates in the direction of arrow β in FIG. The stopper 617 is the cutter base 6
04, the ring 615 stops rotating. The engagement between the cam follower 624 and the cam plate protrusion 702 is maintained, and the rotation shaft 606 further rotates in the direction of arrow β in FIG. As a result, elastic force is generated in the spring 618. The elastic force generated in the spring 618 urges the ring 612, and thus the rotating shaft 606, to rotate in the direction of arrow α in FIG.

As shown in FIG. 8 (a), the cutter assembly 6 is moved further rearward, the fixed blade 630 passes through the curved portion of the lower leg B1 of the knee joint S4, and the thigh near the knee joint S4 is cut. At the time of projecting inward, the engagement between the cam follower 624 and the projection 702 of the cam plate is released. At the same time as the engagement between the cam follower 624 and the projection 702 of the cam plate is released, the guide 60 of the cutter assembly 6 is released.
5 contacts the piston of the hydraulic braking device 10. Thereafter, the operation of the hydraulic braking device 10 reduces the rearward movement speed of the cutter assembly 6. The forward force applied to the fixed cutting blade 630 'from the meat near the knee joint S4 is small, and the resistance moment is small. On the other hand, in addition to the urging force from the spring 609 in the direction of the arrow α in FIG.
Bias from 18 is also added. Therefore, when the engagement between the cam follower 624 and the projection 702 of the cam plate is released, the rotary shaft 606 quickly rotates in the direction of the arrow α in FIG. 2, and the movable blade 640 and the fixed blade 630 also quickly move. It rotates in the direction of arrow α of 2 and returns to the initial rotation position.
As a result, the left side surface of the fixed blade 630 quickly approaches again the right side surface of the knee joint S ₄ protruding rightward. Thereby, the thigh S is cut open along the right side surface of the knee joint S4,
Pushing work continues without any problems. Hydraulic braking device 10
Since the moving speed of the cutter assembly 6 to the rear is reduced by the operation of, the movable blade 640 and the fixed blade 630 project into the thigh near the knee joint S4 and then return to the initial rotation position. The distance that the movable blade 640 and the fixed blade 630 move to the rear side is short before the right side surface of the knee joint S ₄ is approached again. Therefore, when the meat S is cut open even along the right side surface of the knee joint S4 and pushed and expanded, the amount of the meat attached and left behind on the right side surface of the knee joint S4 is small. Hydraulic braking device 1
By adjusting the zero flow control valve, the reduction amount of the moving speed of the cutter assembly 6 can be set to the optimum value. Open the thigh S along the right side of the knee joint S4,
At the time of the push-spreading work, similarly to the above, the knee joint S4 receives a leftward force from the fixed blade 630, and the boned thigh S rotates clockwise around the ankle S3 in FIG. 8 (a),
The knee joint S4 moves to the left. In addition, the pressing roll 802
Receives a leftward force from the knee joint S4 and moves leftward against the biasing force of the spring 806. As a result, the fixed blade 63
The distance between 0 and the pressing roll 802 becomes wider. Due to the above-described movement of the knee joint S4 to the left and the increase in the distance between the fixed blade 630 and the pressing roll 802, the knee joint S4 can pass between the fixed blade 630 and the pressing roll 802 without trouble.

As shown in FIG. 8B, when the cutter assembly 6 is moved further rearward, the femur S2 is fixed by the fixed blade 630.
It comes into contact with the left side of the. Since the right side surface of the femur S2 is inclined leftward from the front to the rear, the movable blade 6
When 40 is held in the initial rotation state, the fixed blade 630
Has a left side surface with respect to the right side surface of the femur S2. Therefore, a forward resistance force is applied from the femur S2 to the fixed cutting blade 630 '. Thus, the forward resistance force from the femur S2 induces a resistance moment exceeding the initial moment M ₀ , and the rotating shaft 606 resists the biasing force of the spring 609 in the direction opposite to the direction of the arrow α in FIG. Rotate.
Along with this, the movable blade 640, and thus the fixed blade 630.
Also rotates around the rotation shaft 606 and moves to the right front position of the rotation shaft 606. Further, the left side surface of the fixed blade 630 is inclined rightward from the front edge toward the rear edge when viewed from above. As a result, the left side surface of the fixed blade 630 leans again on the left side surface of the femur S2 that inclines rightward from the front to the rear. This allows the thigh meat S to be cut open and pushed and expanded along the right side surface of the femur S2 without interruption. At this time, similarly to the above, the femur S2 receives a leftward force from the fixed blade 630, and the boned thigh meat S rotates clockwise around the ankle S3 in FIG. 8 (b), and the femur S2 becomes Move to the left. By moving to the left, the femur S2 can pass between the fixed blade 630 and the pressing roll 802 without any trouble.

As shown in FIG. 8C, when the cutter assembly 6 moves further rearward and the fixed blade 630 reaches the position closest to the hip joint S5, the cam follower 624 is attached to the projection 703 of the cam plate 7. Engage. Cutter assembly 6
When is moved further rearward, a forward force is applied to the cam follower 624 from the protrusion 703, and the ring 622 is moved to the position shown in FIG.
Rotate in the direction of arrow β. With the rotation of the ring 622, the stopper 621 contacts the arm 623 of the ring 622, and the ring 619 rotates in the direction of arrow β in FIG.
Consequently, the rotary shaft 606 rotates in the direction of arrow β in FIG. 2, that is, in the direction opposite to the direction of arrow α. At the position closest to the hip joint S5, the curvature of the right side surface of the femur S2 rapidly increases. Therefore, the rotation angle of the rotating shaft 606 due to the increase in the forward resistance force applied from the femur S2 to the cutting blade 630 'of the fixed blade. Is not kept up with the increase in the curvature of the right side surface of the femur S2, and the movable blade 640 may bite into the femur S2 and scrape the bone. However, as described above, in this embodiment,
When the fixed blade 630 reaches the position closest to the hip joint S5, the rotating shaft 606 is forcibly rotated by the cam mechanism. As a result, the rotation angle of the rotation shaft 606 also sharply increases in accordance with the sharp increase in the curvature of the right side surface of the femur S2.
This prevents the movable blade 640 from biting into the femur S2 and scraping the bone at the position of the femur S2 immediately adjacent to the hip joint. As for the area around the hip joint S5, similarly to the area around the indirect knee S4, the work of opening and pushing the thigh S and expanding the work is continued without any trouble, and the streak work of the boned thigh meat S is completed.

At the time when the streaking operation of the boned thigh meat S is completed, the piston of the air cylinder 601 and the air cylinder 6
03 piston moves backward from the forward position and the motor 631
Stops working. As the piston of the air cylinder 601 retreats, the cutter base 604, and thus the cutter body 629, moves upward, and the fixed blade 630 and the movable blade 640 also move upward to separate from the meat S with bone.
Further, as the operation of the motor 631 stops, the vertical reciprocating movement of the movable blade 640 stops. Air cylinder 603
The cutter base 60
4. Consequently, the cutter body 629 moves forward and returns to the upper position of the thigh gripping assembly 3. Also, the cutter guide 9 and the boned part are separated from the meat S and moved upward.

As can be seen from the above description, according to the apparatus for streaking chicken thighs along the bone of meat according to this embodiment, the reaction force from the meat S is added to the cutting edge 630 'of the fixed blade 630. Since the fixed blade 630 rotates accordingly, the fixed blade 6
The left side surface of 30 always stays close to the right side surfaces of the lower leg S1 and the femur S2. As a result, the movable blade 640 guided by the right side surface of the fixed blade 630 having a wedge-shaped horizontal cross section cuts the meat while always contacting the cutting blade 640 'with the right side surfaces of the lower femur S1 and the femur S2. Can be streaked along the bone without leaving any meat. Moreover, since the cutting blade 640 'of the movable blade only projects slightly downward and rearward from the cutting blade 630' of the fixed blade, there is no possibility that the movable blade 640 bites into the bone and scrapes the bone. Fixed blade cutting edge 630 'and movable blade cutting edge 64
Since both 0's are inclined obliquely downward from the rear toward the front, the thigh S is cut open while being pressed downward. As a result, when the meat S is cut open while the fixed blade 630 and the movable blade 640 move rearward, the meat rises behind the fixed blade cutting blade 630 'and the movable blade cutting blade 640' to hinder the cutting work. This will prevent the occurrence of such a situation, which in turn guarantees a smooth cutting operation. The compulsory rotation of the rotating shaft 606 by the cam mechanism prevents the cutting blade 640 'of the movable blade from biting into the knee joint S4 and the hip joint S5 and cutting the bone. Due to the double return mechanism by the springs 609 and 618, the movable blade 640 and the fixed blade 630 protruding into the thigh near the knee joint immediately return to the initial rotation position and are again attached to the right side surface of the knee joint S4. Snuggle up. Further, due to the operation of the hydraulic braking device 10, the moving speed of the movable blade 640 and the fixed blade 630 to the rear is reduced after the movable blade 640 and the fixed blade 630 protrude into the thigh near the knee joint, and thus the movable blade 640 moves. The blade 640 and the fixed blade 630 form the knee joint S4.
The distance that the movable blade 640 and the fixed blade 630 move to the rear is short after returning to the initial rotation position and again leaning to the right side surface of the knee joint S4 after protruding into the thigh in the vicinity. Therefore, when the meat S is cut open even along the right side surface of the knee joint S4 and pushed and expanded, the amount of the meat attached and left behind on the right side surface of the knee joint S4 is small.

After the streaking is completed, the thigh gripping assembly 3 resumes its movement to the left while maintaining the closed state. Near the end of the upper traveling portion 201 of the endless chain, the engagement of the cam roller 306 and the line cam 402 is released,
The cam roller 305 and the line cam 401 are engaged with each other. As a result, the flesh grip assembly 3 is opened. The meat S is taken out from the meat gripping assembly 3 in the opened state. The leg meat S taken out from the meat gripping assembly 3 is sent to the next step. The stapling device B for the left leg has been described above, but it can be used as a stapling device for the right leg by reversing the left and right of the device B. A normal hydraulic damper may be used as the hydraulic braking device 10.

[0035]

In the streaking device according to the present invention, the operation of the rotation regulating means causes the first blade to rotate in response to the reaction force from the meat added to the cutting blade of the first blade of the meat cutting means to rotate the first blade.
The second side of the blade always nestles against the side of the lower leg and the side of the femur. The second blade guided by the first side surface of the first blade having a wedge-shaped horizontal cross section is reciprocally driven up and down by the first drive means,
The meat is cut open while the cutting blade is always in contact with the side surface of the lower leg and the side surface of the femur. At the position near the knee joint, the first blade is forcibly rotated by the forced rotation means. As a result, even at the position near the knee joint where the curvature of the side of the lower leg rapidly increases,
Make sure the second side of the first blade snugs against the side of the lower leg. Therefore, according to the streaking device according to the present invention, the boned thigh meat of the feeding bird is automatically cut open along the bone. Further, in the streaking device according to the present invention, the cutting of the first blade formed by inclining obliquely downward from the front to the rear in the moving direction when the thigh meat cutting means moves horizontally while engaging the thigh meat. By the blade and the cutting blade of the second blade, the thigh meat is pressed down and opened. As a result, when the cutting blade of the first blade and the second blade move horizontally while cutting open the meat, the first blade
It is possible to prevent a situation in which the meat is swelled up and obstructs the slitting operation in front of the blade of the blade and the blade of the second blade in the horizontal movement direction. Furthermore, in the streaking device according to the present invention, the horizontal movement speed of the thigh meat cutting means is increased by the operation of the braking means.
Since the first blade and the second blade of the thigh meat cutting means project and fall below the thigh in the vicinity of the knee joint, the thigh meat cutting means protrudes into the thigh in the vicinity of the knee joint and then leans against the knee joint again. The horizontal distance between the first blade and the second blade is short.
Therefore, the amount of meat left behind near the knee joint is small.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of an apparatus for streaking along a bone of a chicken leg with bone according to an embodiment of the present invention.

FIG. 2 is an enlarged view of an X mark portion in FIG.

FIG. 3 is a perspective view showing a fixed blade and a movable blade of a cutter assembly that constitutes the streak inserting device.

FIG. 4 is a perspective view of a pressure roll assembly that constitutes the streak inserting device.

FIG. 5 is a perspective view of a cutter guide that constitutes the streak inserting device.

6 is a view taken along the line VI-VI in FIG.

FIG. 7 is a plan view showing the operation of the streaking device.

FIG. 8 is a plan view showing the operation of the streaking device.

[Explanation of symbols]

 A thigh meat conveying device B device for inserting streaks along the bones of chicken leg with bone 2 endless chain 3 thigh meat gripping assembly 6 cutter assembly 7 cam plate 8 pressing roll assembly 9 cutter guide

Claims (11)

[Claims] 1. A first blade having a wedge-shaped horizontal cross section and vertically extending cutting blades, and a cutting blade projecting from the cutting blade of the first blade and arranged along a first side surface of the first blade. A second blade provided and first driving means for reciprocally driving the second blade up and down with respect to the first blade; a meat cutting means for cutting thigh meat; and a first thigh meat cutting means for boned thigh meat. A pressing means for pressing the first blade toward the second side surface; a second driving means for engaging and disengaging the meat when the meat cutting means is moved up and down; and a third driving means for horizontally moving the meat cutting means. Even if the first and second blades of the thigh meat cutting means are offset laterally in the horizontal movement direction of the thigh meat cutting means, the shaft member is fixed to the meat cutting means and extends in the vertical direction, and an initial rotational moment is applied to the shaft member. The first spring that applies a bias to rotate the shaft member and the initial rotation moment When the force applied to the cutting blade of the first blade of the thigh meat cutting means is less than a predetermined value, the rotation of the shaft member is regulated and added to the cutting blade of the first blade. When the force exceeds a specified value, it has a rotation restricting device that allows the shaft member to rotate and a cam mechanism consisting of a fixed cam and a cam follower fixed to the shaft member.The thigh meat cutting device reaches a specified horizontal position. A device for inserting streaks along the bones of a thigh with a bone of a poultry bird, characterized by comprising: forcible rotation means for forcibly rotating the shaft member at the time. 2. The cam of the forced rotation means is provided with a cam projection which engages with a cam follower when the thigh meat cutting means reaches a position near the knee joint of the thigh meat. A device for inserting streaks. 3. The cam according to claim 2, wherein the cam of the forced rotation means is formed with a cam projection that engages with the cam follower when the thigh meat cutting means reaches the position near the hip joint of the thigh meat. A device for streaking. 4. The streaking device according to claim 1, further comprising means for changing the fixed position of the cam of the forced rotation means. 5. A forcible device having a ring member rotatably fitted to the shaft member of the rotation restricting means, a second spring connecting the shaft member and the ring member, and a stopper restricting the rotation of the ring member. The stirrup according to any one of claims 1 to 4, further comprising: a rotation biasing unit that applies a rotation biasing force to the shaft member in a direction opposite to the direction of the forced rotation when the shaft member is forcedly rotated by the rotation unit. Device to do. 6. The streak inserting device according to claim 1, further comprising a braking unit that reduces a horizontal movement speed of the thigh meat cutting unit after the thigh meat cutting unit reaches a predetermined horizontal position. 7. The streaking device according to claim 6, wherein the braking means is a hydraulic braking means. 8. A first blade having a wedge-shaped horizontal cross section and vertically extending cutting blades, and a cutting blade projecting from the cutting blade of the first blade and arranged along a first side surface of the first blade. A second blade provided and first driving means for reciprocally driving the second blade up and down with respect to the first blade; a meat cutting means for cutting thigh meat; and a first thigh meat cutting means for boned thigh meat. A pressing means for pressing the first blade toward the second side surface; a second driving means for engaging and disengaging the meat when the meat cutting means is moved up and down; and a third driving means for horizontally moving the meat cutting means. Even if the first and second blades of the thigh meat cutting means are offset laterally in the horizontal movement direction of the thigh meat cutting means, the shaft member is fixed to the meat cutting means and extends in the vertical direction, and an initial rotational moment is applied to the shaft member. The first spring that applies a bias to rotate the shaft member and the initial rotation moment When the force applied to the cutting blade of the first blade of the thigh meat cutting means is less than a predetermined value, the rotation of the shaft member is regulated and added to the cutting blade of the first blade. The thigh meat cutting means engages the thigh meat with the first blade cutting blade and the second blade cutting blade of the thigh meat cutting means, the rotation regulating means allowing rotation of the shaft member when the force exceeds a predetermined value. A device for inserting streaks along the bones of a thigh with a bone of a poultry bird, which is formed so as to be inclined obliquely downward from the front to the rear in the direction of horizontal movement in the above state. 9. The first blade and the second blade of the thigh meat cutting means are slanted from the front to the rear in the moving direction when the thigh meat cutting means horizontally moves in a state of engaging the thigh meat. 2. It is formed so as to be inclined downward.
The streaking apparatus according to any one of 1 to 7. 10. A first blade having a wedge-shaped horizontal cross section and vertically extending cutting blades, and a cutting blade projecting from the cutting blades of the first blades and arranged along a first side surface of the first blade. Second blade installed and second
A first cutting means for reciprocating the blade up and down with respect to the first cutting edge; a meat cutting means for cutting the thigh meat; and a boned thigh meat toward the second side surface of the first blade of the thigh meat cutting means Pressing means, a second driving means for engaging and disengaging the meat when the thigh meat cutting means is moved up and down, a third driving means for horizontally moving the thigh meat cutting means, and a first blade and a first blade of the thigh meat cutting means. A shaft member that is fixed to the meat cutting means and extends in the vertical direction even if it is offset laterally in the horizontal movement direction of the meat cutting means from the two blades, and an initial rotation moment is applied to the shaft member to rotationally bias the shaft member. A first spring and a stopper that restricts the rotation of the shaft member due to the initial rotation moment are provided. When the force applied to the cutting blade of the first blade of the thigh meat cutting means is equal to or less than a predetermined value, the rotation of the shaft member is restricted. , Force applied to the cutting edge of the 1st blade When the value exceeds a predetermined value, a rotation restricting means that allows the shaft member to rotate, and a braking means that reduces the horizontal movement speed of the thigh meat cutting means after the thigh meat cutting means reaches the predetermined horizontal position are provided. A device that inserts streaks along the bones of thigh meat with the characteristic bones of eating birds. 11. The streaking device according to claim 10, wherein the braking means is a hydraulic braking means.