JP6019451B1 - Nerve fastener - Google Patents

Abstract

An object of the present invention is to provide a nerve fastener that is durable and in which the spinal cord in the nerve arch is difficult to remain. A nerve fastener 10 according to the present invention is configured such that at least a part of a linear portion 12 which is a portion inserted into a nerve arch 26 of a spine 24 of a fish 20 is twisted with a plurality of wires. As a result, irregularities are formed on the surface of the linear portion 12, so that the spinal cord 28 is easily destroyed and removed by friction between the irregularities and the spinal cord 28, and the surface of the linear portion 12 does not need to be processed. Therefore, a hard material such as spring steel can be used, and the durability of the nerve fastener 10 itself can be increased. [Selection] Figure 1

Description

  The present invention relates to an instrument used for so-called nerve tightening for maintaining the freshness of fish, and specifically, a flexible linear instrument (hereinafter simply referred to as “nerve fastener”) that penetrates the spinal cord of a raw fish. About).

  It is known that the fish body changes roughly in four stages after the fish dies. First of all, immediately after the fish dies, the fish is almost in the same state as when it is alive. Thereafter, the body of the fish becomes stiff due to post-mortem rigidity, and then the body of the fish is loosened by unraveling the post-mortem rigidity. Eventually, the fish will rot.

  The reason why fish body is stiff after death is that adenosine triphosphate (ATP), which is an energy source of life activity, is decomposed into amino acids by degrading enzymes in the body. It is thought that the structure of myofibrils is weakened by degrading enzymes (proteases). The arrival of these decomposition reactions has been found to be much faster for fish compared to cattle, pigs and chickens.

  In order to maintain the freshness of fish, the arrival of ATP degradation reaction, that is, the arrival of post-mortem stiffness, the state where the fish body is biochemically active, that is, the state where ATP is present in the muscle It is required to maintain. Conventionally, in order to delay the arrival of stiffness after the death of a fish, a method has been employed in which the spinal cord that passes through the nerve arch of the fish spine (hereinafter also simply referred to as “innervous arch”) is injured, destroyed, or removed. It was. By this treatment, the spinal nerve runaway (nerve runaway) is suppressed, and the consumption of ATP in the muscle due to muscle spasm resulting from the nerve runaway that occurs after the death of the fish is the basic principle that delays the arrival of post-mortem stiffness.

  In order to damage or destroy / remove the spinal cord passing through the nerve arch, conventionally, a linear nerve fastener has been used. For example, Patent Documents 1 and 2 disclose such a nerve fastener. There is what is shown.

JP 2008-253237 A JP 2009-261351 A

  Patent Document 1 discloses a linear member having a square cross section having a tip portion, which is inserted into the nerve arch, and a spatula portion for removing fish scales at an end portion opposite to the tip portion or A nerve fastener provided with a brush portion for cleaning the inside of a fish belly is disclosed.

  Patent Document 2 discloses a linear nerve fastener that is inserted into the nerve arch to destroy and remove the spinal cord, and has a non-slip portion formed on the surface over its entire length. The said anti-slip | skid part can be made into the some spine part (what an uneven | corrugated cross section becomes a forward direction with respect to the advancing direction) which goes to the front-end | tip direction of a nerve fastener.

  By the way, the cross-sectional shape of the nerve arch of a fish is not a perfect circle, and the shape varies depending on the type of fish. On the other hand, even with the same type of fish, there are individual differences, so the shape is not constant, and even when viewed with a single fish, the nerve arch is thinning from the head to the tail Because it is not a certain size.

  As a nerve fastener that is inserted into the nerve arch of a fish having the above properties, the nerve fastener disclosed in Patent Document 1 has a square cross section and does not match the shape of the nerve arch, Part of the spinal cord may remain in the gap between the fasteners. If the spinal cord remains in the nerve arch, nerve runaway is likely to occur and ATP may be easily consumed.

  On the other hand, in the nerve fastener disclosed in Patent Document 2, the nerve cells around the wire are also destroyed by friction by the anti-slip portion. However, even if an anti-slip part is formed on the surface of the wire, or a spine-like anti-slip part is formed, a gap between the nerve pylorus and the nerve fastener is generated, so that the spinal cord may remain in details in the nerve arch As with the nerve fastener disclosed in Patent Document 1, there is a problem that ATP is easily consumed. In addition, it is difficult to use a hard material as the wire because it is necessary to apply a non-slip process to the surface of the wire. For this reason, there is a problem of durability that the wire is easily deformed by repeated use.

  In view of the above-described problems of the prior art, an object of the present invention is to provide a nerve fastener that is durable and in which the spinal cord in the nerve arch can hardly remain.

The present invention relates to a nerve fastener having a linear portion to be inserted into a nerve arch of a fish spine,
At least a part of the linear portion is formed by twisting a plurality of wire rods to solve the problem.

  According to the present invention, at least a part of the linear portion is formed by twisting a plurality of wire rods, thereby forming irregularities on the surface of the linear portion, so that the spinal cord is caused by friction between the irregularities and the spinal cord. Easy to destroy and remove. Moreover, when the linear part is gripped, the unevenness functions as a slip stopper, so that it is possible to provide a nerve fastener that is easy for the user to use. In addition, since the surface of the linear part does not require processing, hard materials such as spring steel can be used, the durability of the nerve fastener itself can be increased, and the simple structure makes the nerve fastener easy to manufacture. can do.

  Further, if the linear part is configured to include a brush part configured by sandwiching a plurality of bristle members between the linear members, the bristle member enters the gap between the linear part and the nerve arch, Since the spinal cord of the details in the portal can be destroyed and removed, the spinal cord hardly remains in the nerve arch. Thereby, compared with the conventional nerve fastener, arrival of the stiffness after the death of the fish can be significantly delayed, and the freshness of the fish can be maintained for a longer time.

  Also, if the brush part is provided from the end of the linear part that is inserted into the nerve arch, the spinal cord in the nerve arch in the area within which the linear part is inserted into the nerve arch. It is preferable because it can be destroyed and removed.

  Further, if the bristle member is provided in the range of 360 ° in the radial direction of the linear portion, the detailed spinal cord in the nerve arch in all directions with respect to the linear portion can be destroyed and removed.

  Further, the brush part is provided in a certain range in the axial direction of the linear part, and the bristle member is configured to become longer from the end of the linear part inserted into the nerve arch to the other end. Good. Since the nerve arch of the fish is narrowed from the head side to the tail side, the shape of the brush part matches the shape of the entire nerve arch as a result of this configuration. It is possible to provide a nerve fastener that can be easily inserted into the pylorus and that can easily destroy and remove the spinal cord in the details of the nerve arch from the head side to the caudal side.

The side view of the nerve fastener of 1st embodiment of this invention. The side view of the nerve fastener of 2nd embodiment of this invention. The figure which showed the nerve fastening process using the nerve fastener of 2nd embodiment of this invention. Cross section of a fish vertebral body. The side view of the nerve fastener of 3rd embodiment of this invention.

  An embodiment of the present invention will be described with reference to FIGS. However, the present invention is not limited to this embodiment.

  The nerve fastener 10 in FIG. 1 is a linear portion 12 that is a portion that is inserted into the nerve arch 26 (see FIGS. 2 and 3) of the spine 24 of the fish 20 and a portion that is not inserted into the nerve arch 26. A handle 13 is provided. The linear portion 12 is configured by twisting a wire material formed of a material having elasticity, for example, super hard stainless steel, piano wire, synthetic resin, or the like. In the nerve fastener 10, the linear portion 12 and the handle portion 13 are formed of the same material and configuration, but they may be formed of different materials or configurations, and in particular, separate parts are provided in the handle portion 13. It is also possible to make it easy to grip by attaching. In the following, the end on the linear portion 12 side inserted into the nerve arch 26 is referred to as “terminal”, and the end on the handle portion 13 side not inserted into the nerve arch 26 is referred to as “base end”.

  The linear portion 12 is formed by twisting two or more wires, preferably two or four wires. According to this configuration, since the unevenness is formed on the surface of the linear portion 12 by twisting the wire, the spinal cord 28 is easily destroyed and removed by friction between the unevenness and the spinal cord 28.

  As long as the portion formed by twisting the wire is provided at least in part with respect to the entire linear portion 12 inserted into the nerve arch 26, the nerve fastener is more durable than the conventional one. can do. However, the entire linear portion 12 inserted into the nerve arch 26 is preferably formed by twisting a wire, and the handle portion 13 may have the same configuration. This is because, when the linear portion 12 or the handle portion 13 is gripped, the unevenness formed on the surfaces thereof functions as a slip stopper, so that the nerve fastener 10 that is easy to use for the user can be obtained.

  Further, since the nerve fastener 10 does not require processing on the surface of the linear portion 12, a hard material such as spring steel can be used. Thereby, since it can be set as a thing which cannot change easily even if it repeats use frequency, durability of the nerve fastener 10 can be raised. Moreover, since it is a simple structure, it is easy to manufacture, and even a small fish with a thin diameter is easy to manufacture.

  A distal end 14 may be provided at the end of the nerve fastener 10. This is because the apex portion 14 penetrates the spinal cord, so that the linear portion 12 can be easily placed in the nerve arch 26. The pointed portion 14 may be attached to the end of the linear portion 12 by processing the end of the linear portion 12 or by welding or the like. Further, it is preferable to provide a handle 18 having a diameter larger than that of the handle portion 13 at the proximal end. This is because the nerve fastener 10 can be easily pulled out by placing the hand on the handle 18.

  As shown in FIG. 2, the nerve fastener 10 a having the brush portion 16 can be obtained by sandwiching a plurality of bristle members 15 between the wire members. The brush part 16 can be formed on at least a part or all of a part formed by twisting the wire of the linear part 12. As shown in the drawing, the brush part 16 is preferably configured to be provided from the end of the linear part 12 toward the base end. This is because the detailed spinal cord 28 in the nerve pylorus 26 can be destroyed and removed as long as the linear part 12 is inserted into the nerve arch 26.

  The bristle member 15 constituting the brush portion 16 may be made of a material having flexibility and durability, for example, nylon, and a material that is harmless even when used for food processing. Good.

  The bristle member 15 is provided toward the radially outer side of the linear portion 12. The bristle member 15 is preferably provided in the range of 360 ° in the radial direction of the linear portion 12. This is because, as will be described later, it is possible to destroy and remove the detailed spinal cord in the nerve ostium 26 in all directions with respect to the linear portion 12. The diameter of the linear portion 12 and the length of the bristle member 15 may be adjusted depending on the fish to be used.

  Here, a usage example of the nerve fastener 10a will be described. As shown in FIG. 3, the spine 24 of the fish 20 is constituted by a plurality of thrusters 22 connected in series. A cross-sectional view of the thruster 22 is shown in FIG. A nerve pylorus 26 is formed in the thrusting body 22, and a spinal cord 28 passes through the nerve pylorus 26.

  As shown in FIG. 3, the nerve fastener 10 a is used by being inserted into the nerve arch of the fish 20. The nerve fastener 10a can be inserted from the tail side of the fish 20 in addition to the illustration, but it is preferably inserted from the head side of the fish 20 as shown. In particular, a needle-like piercing tool such as an ice pick is used to open a perforation that penetrates the brain and medulla (not shown) of the fish 20 and communicates with the nerve ostium 26, from which the nerve fastener 10a is formed. May be inserted into the nerve arch. The nerve tightening is usually performed by penetrating the nerve fastener 10a to the tail of the fish 20 and then moving it forward and backward a plurality of times and extracting it. As a result, the spinal cord 28, which is the central nerve, is destroyed and removed, and nerve tightening is completed.

  Here, since the nerve fastener 10 a includes the brush portion 16, the bristle member 15 (see FIG. 2) enters the gap between the linear portion 12 and the nerve arch 26. Thereby, since the spinal cord 28 of the details in the nerve arch 26 can be destroyed / removed, the spinal cord 28 is difficult to remain in the nerve arch 26, so that the arrival of the stiffness after the death of the fish can be significantly delayed, The freshness of fish can be maintained for a longer time. At this time, if the bristle member 15 is provided in a range of 360 ° in the radial direction of the linear portion 12, it is possible to destroy and remove the detailed spinal cord 28 in the nerve arch 26 in all directions with respect to the linear portion 12. it can.

  The range in the radial direction or the axial direction with respect to the linear portion 12 where the brush portion 16 is provided can be changed depending on the size of the target fish, in addition to being provided on a part of the linear portion 12 as shown in the figure. It can also be provided over the entire linear portion 12. Moreover, the shape of the brush part 16 can be made arbitrary by changing the length of the bristle member 15. For example, like the nerve fastener 10b shown in FIG. 5, the bristle member 15a can be configured to include a brush portion 16a that becomes longer from the distal end toward the proximal end. In general, the nerve arch of a fish is narrowed from the head side to the tail side, and the shape of the brush portion 16a matches the shape of the nerve arch. Therefore, it is easy to insert the linear portion into the nerve arch on the tail side of the fish. In addition, it is possible to provide a nerve fastener that can easily destroy and remove the spinal cord in the details of the nerve arch from the cranial side to the caudal side.

  The fish that can use the nerve fastener of the present invention are most fishes having a spine, for example, blue fish such as sardines, horse mackerel, mackerel, yellowtail, amberjack, flounder, Thai, flounder and flounder. White fish such as sea bream, grouper, scorpionfish and barracuda, and red fish such as bonito and tuna. It can also be used for freshwater fish.

  As described above, according to the present invention, it is possible to provide a nerve fastener that is durable and hardly retains the spinal cord in the nerve arch.

10 nerve fastener 12 linear portion 15 bristle member 16 brush portion 24 spine 26 nerve arch

Claims (5)

In a nerve fastener having a linear portion inserted into the nerve arch of the fish spine,
At least a part of the linear part is configured by twisting a plurality of wires,
Nerve fastener.   The nerve fastener according to claim 1, wherein the linear portion includes a brush portion configured by sandwiching a plurality of bristle members between the wire members.   The nerve fastener according to claim 2, wherein the brush portion is provided from an end of the linear portion that is inserted into the nerve arch.   The nerve fastener of Claim 2 or 3 with which the said bristle member is provided in the range of 360 degrees of radial directions of the said linear part. The brush portion is provided in a certain range in the axial direction of the linear portion;
The nerve fastener according to any one of claims 2 to 4, wherein the bristle member is elongated from an end of the linear portion that is inserted into the nerve arch to the other end.

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