JPS6129687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of holding bone-in thigh meat as a workpiece in a fixed manner in the air in the work of deboning bone-in chicken thigh meat using a belt-shaped cutter. This is related to the retention method created in this way.

In recent years, the raising and slaughtering of chickens and the processing of carcasses are rapidly becoming large-scale, and various tasks are being automated, but the work of deboning the bone-in thigh meat and separating the meat is difficult. is still done manually.

The reason why the mechanization and automation of the deboning work of bone-in thigh meat has been delayed is that the thigh meat has an irregular shape.

In other words, because of the irregular shape, it is difficult to separate bones from meat without visual inspection and manual labor.To mechanize this process, it is necessary to use a large-scale computer with feedback from a large number of sensors. Since it must be automatically controlled, it becomes a very expensive device and is not economically viable.

However, recently, a method for deboning bone-in carcasses using a belt-shaped cutter has been developed, and it has become possible to specifically apply this method to automatically debone bone-in thigh meat. Ta.

The above method for deboning a carcass was invented by the inventors of the present application, and a separate patent application is currently being filed by the applicant of the present application.

An outline of the above bone removal method will be described below with reference to FIG.

Wrap the belt-shaped cutter 1 around the bone 2a in an almost perpendicular direction, and wrap the belt-shaped cutter 1 around the bone 2a.
Move it in the circumferential direction (arrow R) along the surface. In this case, the movement of the belt-shaped cutter 1 is mainly driven in the reciprocating direction as shown by arrows F and G in the figure. When the belt-shaped cutter 1 is moved in this manner, the action is not to handle the bones and peel them off, but to make cuts between the bones and the meat. Therefore, when the belt-shaped cutter 1 is slid in the longitudinal direction of the bone as shown by arrow B at a speed lower than the circumferential movement described above, the bone 2a and the meat 3 can be separated with a relatively small force. I can do it.

When the belt-shaped cutter 1 approaches the joint 4, since the belt-shaped cutter 1 has a width W, it does not dig in between the bones 2a and 2b, and the arrow D The bone is removed along the envelope of the bone, and the ligament 5 is removed from the bones 2a and 2b.
The bones 2a, 2b and the meat 3 are separated while remaining attached to the bones 2a, 2b.

According to the method of the present invention, the belt-shaped cutter 1 can be guided by the bones 2a and 2b and moved in the longitudinal direction thereof, so that the cutter can be removed easily and efficiently without the need for an automatic control device with a complicated feedback function. Can be boned.

The above method is an extremely excellent basic technique for deboning a bone-in carcass using an automatic device. If you try to construct it, it is necessary to grasp both ends of the bone-in thigh meat and hold it fixedly in the air.

The reason for this is that the above-mentioned deboning method involves wrapping the belt-shaped cutter 1 around the bone 2a and sliding the belt-shaped cutter 1 along the bones in sequence, such as the joint 4 and the bone 2b. , if the central part of the carcass is gripped, deboning work will be hindered.

Further, as can be easily understood from FIG. 1, in order to use this deboning method, the carcass, which is the workpiece, must be held in the air.

Furthermore, when the above-mentioned carcass is bone-in thigh meat of a chicken, bone 2a is attached to the tibia, joint 4 is attached to the knee joint, and bone 2a is attached to the knee joint.
b corresponds to the femur, respectively. That is, the bone-in thigh of a chicken has a knee joint near the center, and its bending angle can be changed with a small amount of force. Therefore, even if the ankle M of the tibia 2a' and the cut end N of the thigh 2b' are grasped by the chucks 6 as shown in FIG. 2, the degree of freedom of the bending angle θ of the knee joint 4' is limited. Therefore, it cannot be held fixedly.

If the bone-in thigh meat that is the workpiece is not firmly held, it will be extremely difficult to wrap the belt-shaped cutter 1 around it and slide it back and forth using an automatic device.

The present invention was made in view of the above circumstances, and
The purpose of this is to use a simple device to securely hold bone-in chicken thighs in the air, and to provide a holding method that requires restraining all but the ends. The aim is to contribute to the completion and advancement of a fully automated integrated process deboning device for thigh meat.

In order to achieve the above object, the method of the present invention involves removing the ankle of the bone-in thigh meat and the cut end of the femur, respectively, in the deboning work of bone-in chicken thigh meat using a belt-shaped cutter. Clamp the knee joint of the bone-in thigh meat by applying force in the direction of separating both clamp parts from each other, and hold the femur and tibia in a state where they form an angle of approximately 15° to tighten the knee joint. It is characterized by eliminating the degree of freedom of bending of the part.

The basic principle of the method of the present invention will be described next.
As explained with reference to Fig. 2, the bending angle θ of the knee joint 4' of the bone-in chicken thigh meat can be changed freely with a small force, so this degree of freedom results in a fixed position of the thigh meat. It is difficult to maintain.

However, the tibia 2a' and thigh 2
When b' is moved, joint 4' will no longer rotate when the angle θ becomes approximately 15 degrees.

If an excessively large force is applied, the biological tissue forming the joint 4' will be torn, resulting in θ<15°, but unless such excessive force is applied, the above angle θ will be disturbed.
The rotation stops when the joint 4' reaches this angle, and if force is continued to be applied in the direction of stretching the joint 4', the entire thigh becomes apparently fixed.

Next, one embodiment of the present invention will be described with reference to FIGS. 2 and 3.

As shown in Figure 2, the tibia 2 is connected by two chucks 6.
The ankle part M of a' and the cut end N of the femur 2b' are grasped, respectively, and force is applied in a direction to separate both chucks 6, 6 from each other.

Then, the joint 4' is stretched, and the knee joint is held fixed with a bending angle θ of about 15 degrees as shown in FIG. 3, and the degree of freedom in bending is lost.

The above angle of 15° will vary slightly (within ±5°) depending on individual differences in chickens. Therefore, in the present invention, stretching the angle θ to about 15° means applying force that does not damage the joint and stretching it as much as possible so that θ=15°±5°.

When the degree of freedom of bending of the knee joint 4' is eliminated by the above operation, the femur with bone is held in the air in the state shown in Fig. 3, and there is no need to restrain parts other than both ends M and N, and it is fixed. The bone is supported by the bone, and the belt-shaped cutter is wrapped around it to remove the bone.

As detailed above, according to the method of the present invention,
Using two chucks equipped with driving means or a similar simple device, bone-in chicken thighs can be moved without directly restraining any part of the bone-in chicken thighs other than both ends. It has the excellent practical effect of being able to be fixedly supported in the air, and will greatly contribute to the practical application of a fully automated integrated process deboning device for bone-in chicken thighs.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the deboning method using a belt-shaped cutter, Figure 2 is a perspective view of bone-in chicken thigh meat being held with two chucks, and Figure 3 is an illustration of the method of the present invention. 1 with bone-in chicken thigh meat held
It is a perspective view showing an example. 1...belt-shaped cutlet, 2a'...tibia, 2b'...
...femur, 3...meat, 4'...knee joint, 5...
Ligament, 6...check.

Claims (1)

[Claims] 1. In the process of deboning bone-in chicken thigh meat using a belt-shaped cutter, the ankle part of the bone-in thigh meat and the cut end of the femur are each clamped, and both clamp parts are separated from each other. The knee joint part of the bone-in thigh meat is stretched by applying force in the direction, and the femur and tibia are held in a state where they form an angle of approximately 15 degrees, thereby eliminating the degree of freedom of bending of the knee joint part. A method of holding the thigh bone during deboning work using a belt-shaped cutter.