JP4753441B2 - Judging method of fishing rod condition - Google Patents

Description

The present invention relates to a fishing rod tone determination method that makes it possible to clearly grasp and evaluate the tone of a fishing rod .

  In general, the condition of the fishing rod, that is, the deflection state of the entire fishing rod is one of the important determination factors for the user who actually purchases the fishing rod. For example, a fishing rod referred to as a tune has a fishing rod that has the advantage of being able to detect subtle movements of the tip of the tip, making it easy to catch the fish and measuring the timing of matching because the tip of the tip is bent. It is considered. In addition, the fishing rod called torso tone is able to effectively absorb the vibration caused by the fish caught on the needle because the hand side bends, making it effective for fishing fish with many mouths. It is believed that.

  Conventionally, as a method for determining such a condition, when a standard load set on the fishing rod is hung on the tip of the fishing rod, it is indicated where the fishing rod is bent. For example, in a fishing rod set to No. 20 load, when the No. 20 weight is suspended and supported at a predetermined angle, the position that is the most apex when the deflection is observed is about 20% from the tip. For example, an 8: 2 tone fishing rod is displayed as a 30: 3 tone fishing rod if it is about 30%. Alternatively, the base end portion of the fishing rod is supported at a predetermined angle, and the deflection state of the entire fishing rod when a weight with a predetermined weight is hung on the tip of the fishing rod is visually displayed as a curve as it is. Yes. Such a display is described in a fishing rod package or catalog.

  However, in the conventional method for determining a fishing rod as described above, for example, when a user purchases a fishing rod, it is only a rough reference and must rely on a sense. That is, according to the expression of 8: 2 tone fishing rod, 7: 3 tone fishing rod, or the method of visually displaying the deflection state of the entire fishing rod when a weight of a predetermined weight is hung on the tip as it is, However, it is difficult for a user who purchases to know the exact tone specific to the fishing rod, although it can be grasped sensuously whether it is the tone or torso tone. For example, even if the same tone display (for example, 8: 2 tone) is used, the deflection of the two fishing rods may differ when comparing the two fishing rods during actual fishing, or the purchased fishing rod may Not happen.

  In an actual fishing rod, various loads are applied depending on the fish species, the movement of the fish, and the operation method associated therewith. With the conventional display method described above, it is not possible to clearly grasp or sensuously predict the exact state of deflection of the fishing rod under such circumstances.

The present invention has been made based on the above-described problem, and an object of the present invention is to provide a method for determining the condition of a fishing rod that makes it possible to accurately specify the condition of the fishing rod .

  The present inventor can accurately grasp the characteristics related to the condition of the fishing rod by accurately specifying the position where the bend is largest in grasping the condition of the fishing rod, and also for the user who purchases the fishing rod. The present invention has been conceived in the light of the fact that it can be presented more specifically rather than sensory. In other words, as described above, the position that is the highest point in the deflection state when the standard load set on the fishing rod is hung on the tip is specified as the point of the tone. Or the conventional method for displaying such a deflection state as a curve (a deflection curve), when the fishing rod is microscopically verified along the length direction, the vertex position is not necessarily the largest in the fishing rod. It is not always in a bent position.

Therefore, in the method for determining the condition of the fishing rod according to the present invention, the base portion of the fishing rod is supported, a different load is applied to the tip portion, and the curvature distribution curve and the maximum curvature position for each load are measured by the measuring means or the fishing rod is The maximum curvature position for each load obtained by calculation from the material to be formed and its arrangement mode is marked on the curvature distribution curve to determine the characteristics of the fishing rod tone.

  Normally, when a load is applied to the tip of the fishing rod, the fishing rod bends in a predetermined curve. When the deflection state of this fishing rod is microscopically verified, it is considered that curves having different radii of curvature are continuous along the axial direction, and the position where the radius of curvature is the smallest (the position where the curvature is the largest; the maximum curvature position) Is the point with the largest bend in the fishing rod. Therefore, by clearly identifying the point where the curve is the largest, it is possible to accurately grasp the condition of the fishing rod or to accurately determine the bending position when a load is applied to the user who purchases the fishing rod. It can be displayed.

In this case, the measurement that is the basis of the determination is performed by applying different loads, obtaining a curvature distribution curve for each load, and marking the maximum curvature position on the curvature distribution curve for each load. This is because the maximum curvature position also shifts in the axial direction by actually applying a different load, so it is possible to grasp the change in the maximum curvature position for each load, and the fish is actually caught on the fishing rod and differs. It is possible to clearly understand the change in the deflection state of the fishing rod when a load is applied, and to design a fishing rod having more optimal tone characteristics .

In such a configuration, each deflection curve indicating the deflection state corresponding to the length position of the fishing rod obtained when different loads are applied in the same manner is written together with each curvature distribution curve, and each deflection curve It is preferable to mark the maximum curvature position.

  In this way, for each load, a deflection curve indicating the deflection state of the fishing rod is written together, and in each deflection curve, marking is given to the maximum curvature position, so that it changes with the load along with the change in the deflection curve for each load. It is possible to visually grasp the change in the curvature distribution to be performed simultaneously, and to easily grasp the maximum curvature position that changes for each load.

According to the method for determining the condition of a fishing rod according to the present invention, it becomes possible to grasp a more accurate condition.

Hereinafter, embodiments of the present invention will be specifically described.
First, a specific method example for obtaining the curvature distribution curve of the fishing rod and the maximum curvature position will be described.
[Method to obtain by measuring means]
The measuring means here corresponds to a device that can support the fishing rod in a cantilevered state and can measure the change in the deflection state when a load is applied to the tip of the tip of the tip. From the measurement result obtained by the measuring device, the deflection of the fishing rod This is a method for obtaining a curve or a curvature distribution curve.

  As shown in FIG. 1, a fishing rod 50 to be measured is fixed at an arbitrary angle θ by a fixing unit 1, a thread 3 is attached to the tip of a tip, and a thread is wound up by a thread winding unit 5, whereby a predetermined load ( A tension S) is generated. This load is measured by the load cell 7 and measured by applying the same load, or by applying a plurality of loads with one fishing rod. In this manner, the fishing rod 50 is bent due to the load applied to the tip of the tip. In this case, the support of the base part (fixed part 1) of the fishing rod leads to an improvement in accuracy if the same type of fishing rod (a fishing rod to be compared) is supported under the same conditions. Usually, as shown in the figure, supporting the grip position at the front and back of the grip portion, or the grip position at the time of fishing rod operation is preferable because it can match the actual use.

  On the other hand, on the outer periphery of the fishing rod 50, a laser scanning device 10 (for example, a laser scanning micrometer (LSM-500H series) manufactured by Mitutoyo Corporation) capable of measuring the outer diameter of the fishing rod is used in the X-axis direction and the Y-axis. It is mounted so as to be movable in each direction by a drive unit (not shown). The measuring unit of the laser scanning device 10 is configured such that the light emitting unit and the light receiving unit are opposed to each other, and scanning is performed so that a fishing rod is sandwiched in the measurement region.

By mounting the laser scanning device 10 on the fishing rod supported as described above and performing measurement, the deflection curve and the curvature distribution curve can be obtained as follows.
1 and 2, a point P indicates a point on the neutral axis of the fishing rod, and Xp and Yp at this position are obtained by measurement. In the figure, a point T is a reference point (center of rotation) of the fixed part of the laser scanning device 10, a ξ axis is an axis on the laser scanning device, ξ _A and ξ _B are measurement data, and a point M is a laser scan. The reference point TM of the apparatus (the length between the points T and M shown in the figure; a bar is attached in the following formula) is an offset value between the points T and M, depending on the assembly position of the laser scanning apparatus. Identified.

Here, Xp and Yp are measurement data of the laser scanning device, that is, position coordinates (X _T , Y _T ) and output data (ξ _A , ξ _B ) at the point T, and when the laser scanning device is rotationally driven. The rotation angle δ at the fixed portion T is measured and derived using the following equation.

この場合、点Ｐの測定を、Ｘ＝０〜荷重負荷点Ｘwまで行なうことによって、釣竿の長さ方向に亘るたわみデータを得ることができる。

In this case, deflection data over the length direction of the fishing rod can be obtained by measuring the point P from X = 0 to the load point Xw.

  Then, in the measurement data of the laser scanning device and the above equation, the deflection curve of the fishing rod is derived by obtaining the approximate curve Y (X) of the deflection at each measured point (in the vicinity thereof) by the least square method. Is possible. Further, the curvature distribution 1 / ρ (X) in the vicinity of each point is obtained by the following expression based on the approximate curve Y (X) obtained by the least square method.

そして、上記した曲率分布の計算を、Ｘ＝０〜荷重付加点Ｘwまで行なうことによってその釣竿の長さ方向に亘る曲率分布曲線、及び最大荷重位置を得ることが可能となる。
［計算によって求める方法］
釣竿を、合成樹脂を含浸した繊維強化シート（プリプレグシート）を複数層巻回することで形成する場合、たわみ曲線、及び曲率分布曲線を計算によって求めることが可能である。

Then, by calculating the curvature distribution described above from X = 0 to the load addition point Xw, it is possible to obtain the curvature distribution curve and the maximum load position over the length direction of the fishing rod.
[Method by calculation]
When a fishing rod is formed by winding a plurality of layers of fiber reinforced sheets (prepreg sheets) impregnated with a synthetic resin, a deflection curve and a curvature distribution curve can be obtained by calculation.

  Specifically, in a tubular body composed of N layers by winding a prepreg sheet, the elastic modulus in the k layer portion is Ek, the outer radius in the k layer portion is Rk, and the (equivalent) bending rigidity of the tubular body is EI. In this case, EI is obtained by the following equation.

そして、一般的に、梁のたわみ曲線Ｙ（ｘ）は次式の微分方程式を解くことによって求めることができ、曲率（１／ρ）は、１／ρ＝Ｍ／ＥＩの関係があるため、次式の解を基にして曲率分布曲線や最大曲率位置を求めることが可能となる。

In general, the beam deflection curve Y (x) can be obtained by solving the following differential equation, and the curvature (1 / ρ) has a relationship of 1 / ρ = M / EI. The curvature distribution curve and the maximum curvature position can be obtained based on the solution of the following equation.

次に、上記した測定方法によって得られる測定結果（曲率分布曲線、たわみ曲線）を、視覚的に表示させる具体的な表示方法について説明する。

Next, a specific display method for visually displaying the measurement results (curvature distribution curve, deflection curve) obtained by the above-described measurement method will be described.

In the display method shown in FIG. 3, the upper row is obtained by taking the length of the fishing rod (unit: mm) on the horizontal axis and the curvature (reciprocal of the radius of curvature; unit 1 / mm) on the vertical axis. The curvature distribution curves of the two fishing rods R1 and R2 measured as shown above are displayed (in the table, “3.0E-03” and “5.0E-04” on the vertical axis represent “3. 0 × 10 ⁻³ ”and“ 5.0 × 10 ⁻⁴ ”; the same applies to FIGS. 4 and 5).

  In each curve, markings M1 and M2 (dots) are attached to the highest position (maximum curvature position) for easy visual recognition, and it is clearly shown at which position the fishing rod is bent most. In addition, P1, P2, and P3, which are valleys, indicate joint portions between the tubules that are less bent.

  According to such a curvature distribution curve, it is possible to grasp the position where bending is difficult and the position where bending is difficult over the length direction of the fishing rod, and it is possible to clearly grasp the position where the fishing rod is most bent. In addition, the characteristics of the fishing rod can be grasped from the shape of the curvature distribution curve. For example, the fishing rod R1 has a peak at the position of 2000 mm, and the curvature distribution changes extremely in the vicinity, or the curvature distribution is constant in the range of 0 to 1000 mm and 1000 mm to 2000 mm. It can be understood that the crossing is an irregular (not connected) fishing rod.

  Similarly, the fishing rod R2 has a peak at the position of 2000 mm, but the curvature distribution gradually changes (smoothly) around the vicinity of the fishing rod R2, so that the fishing rod is smoothly connected to the whole fishing rod. It can be understood that it is a fishing rod with a good connection of bending.

  In the display method shown in FIG. 3, the lower row shows the fishing rod length (unit: mm) on the horizontal axis and the height position (unit: mm) when bent on the vertical axis. The deflection curves of two fishing rods R1, R2 are displayed. Also in this deflection curve, the marking (M1, M2) is given to the maximum curvature position (the most bent position) obtained by the above-described measurement.

  According to such a display method, it is possible to grasp the balance of deflection of the entire fishing rod and to accurately grasp the maximum curvature position that most affects the condition of the fishing rod. In other words, when considering the balance of deflection (deflection curve), both fishing rods are grasped like a torso, but in reality, a fishing rod having a tone with a maximum curvature position on the front side (flexure). It is understood that the actual position is a fishing rod of the first tone rather than the tone position grasped by the curve.

  Further, by displaying the deflection curve in combination with the above-described upper display, it is possible to clearly grasp the difference in the tone of the fishing rod. For example, in the lower display, the two fishing rods R1 and R2 are understood to be fishing rods having the same tone performance because the maximum curvature position is almost the same at first glance, but the upper curvature distribution. By displaying it together with the curve, it is possible to find the difference in tone characteristics.

  According to the display method as described above, it is possible to show a clearer tone characteristic of the fishing rod to the user who purchases the fishing rod, and to make reference for designing the fishing rod.

  FIG. 4 shows a curvature distribution curve (upper stage) and a deflection curve for each load when a different load is applied (the load is changed by 100 g in the range of 0.1 kg to 0.7 kg) with respect to the fishing rod R1 described above. FIG. 5 shows the curvature distribution curve (upper stage) and the deflection curve (lower stage) for each load when a different load is applied to the fishing rod R2 described above. is there. In any curve, marking (for each load) is attached so that the maximum curvature position can be easily recognized.

  According to the display method by the upper stage, it is possible to clearly grasp the position where it is easy to bend and the position where it is difficult to bend for each different load in the length direction by looking at the whole fishing rod, and according to the change in the load, It is possible to grasp the change in the axial position of the most bent. In addition, a specific maximum curvature position (M1-1 to M1-1) that changes for each load can be obtained by providing marking (means that can be immediately grasped visually) at the maximum curvature position of the curvature distribution curve for each load. M1-7) can be easily grasped and the position can be clearly displayed visually. For this reason, for example, when a user purchases a fishing rod, a change in the maximum curvature position of the fishing rod associated with a load change when the fish is actually caught can be clearly displayed, and changes for each load. It is possible to clearly grasp the deflection characteristics of the fishing rod.

  In addition, according to the display method in the lower row, the maximum curvature position is marked on the deflection curve that changes according to the load, so that the relationship between the deflection state that changes with each load and the position that bends most at that time can be clarified. It becomes possible to grasp.

  By displaying the upper display content and the lower display content together, the change in the deflection curve and the change in the maximum curvature position accompanying the change in the load, the change in the curvature distribution that changes with the load, and the load The change in the maximum curvature position that changes can be grasped visually at the same time. In this case, when the fishing rod R1 shown in FIG. 4 follows changes in the maximum curvature positions M1-1 to M1-7 in order from a light load, 0.1 kg and 0.2 kg (M1-1, M1-2). ) From the front side to the base side, while 0.2Kg to 0.5Kg (M1-2 to M1-5) changes in a relatively similar position, but to 0.6Kg (M1-6) When changing, it can be understood that the maximum curvature position suddenly changes to the base side. That is, a fishing rod having such a tone characteristic has a torso tone that is the first tone when the fish is actually caught, when the fish is pulled strongly, or when the angler increases the lifting force. The bend position will change to the heel side, the operability will be poor, and when catching a caught fish, a sudden change in the bending position of the fishing rod will cause the fish to be violent, etc. It can be understood that it is a fishing rod that cannot.

  In addition, it can be understood that the fishing rod R2 shown in FIG. 5 smoothly changes to the base side when the change in the maximum curvature position is followed in order from a light load (M2-1 to M2-7). That is, a fishing rod having such a tone characteristic has a characteristic of gradually changing from a tone to a torso when a fish is actually caught, when a fish is pulled strongly, or when a fisherman increases a lifting force. Therefore, for example, if the spatula has such a characteristic, when the caught fish is taken in, the bent position of the fishing rod smoothly changes to the body tone, so that stable take-in work can be performed and suddenly Therefore, it can be understood that the fishing rod can be stably taken in.

  According to the display methods as shown in FIGS. 4 and 5 as described above, the tone characteristics of the fishing rod can be grasped more accurately, and the change in behavior of the fishing rod accompanying the change in the load when the fish is actually caught is observed. It becomes easy to predict visually. Further, when forming a fishing rod specifically, it is possible to design a fishing rod having more optimal tone characteristics according to the fish type, application, and the like.

  In addition, it is preferable to display the display method as shown in FIGS. 3 to 5 described above, for example, on a package part or in a catalog when selling a fishing rod. With such a display, a user who purchases the display can grasp the state of the fishing rod more accurately than the conventional state display method. Further, without displaying the above-described curve, for example, position information about the obtained maximum curvature position may be displayed together with information on the load. Even with such a display method, the most bent position of the fishing rod can be clearly shown.

  In addition, as a specific method for obtaining the curvature distribution curve and the deflection curve when executing the method for determining the tone of the fishing rod and the display method according to the present invention, a method other than the method described above may be used. For example, as shown in the figure, the method of applying the load and the measuring method may be performed by applying a weight having a preset weight in addition to measuring the load with the load cell 7, or applying the load. About a direction, as shown in a figure, although it is preferable to hang | hang vertically downward from a tip with respect to a horizontal surface, it is not limited to such a direction. In the above-described embodiment, as an example in which a load is applied to the tip portion, an example in which a load is directly applied to the tip of the fishing rod (a concentrated load is applied) has been shown. A method is also included in which a measurement is performed by applying a load to the yarn coming out of the guide at the heel while passing the yarn (in such measurement, concentrated load is applied at two or more locations).

  Furthermore, the method of displaying the measurement result obtained by measurement or calculation can be modified as appropriate as long as the display can grasp the maximum curvature position.

The figure which shows typically the specific method of calculating | requiring the curvature distribution curve and maximum curvature position of a fishing rod. The figure which expands and shows an actual measurement part. The figure which shows a curvature distribution curve (upper stage) at the time of applying predetermined load about two fishing rods R1, R2, and a deflection curve (lower stage). Regarding the fishing rod R1 shown in FIG. 3, the curvature distribution curve (upper stage) and the deflection curve (lower stage) for each load when different loads (loads are changed by 100 g in the range of 0.1 kg to 0.7 kg) are applied. FIG. Regarding the fishing rod R2 shown in FIG. 3, the curvature distribution curve (upper stage) and the deflection curve (lower stage) for each load when different loads are applied (the load is changed by 100 g in the range of 0.1 kg to 0.7 kg). FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixing part 5 Thread winding part 10 Laser scanning apparatus 50 Fishing rod

Claims (2)

A method for determining the condition of a fishing rod,
Supporting the base of the fishing rod, applying different loads to the tip, obtaining the curvature distribution curve and maximum curvature position for each load by measuring means, or by calculation from the material forming the fishing rod and its arrangement,
A method for determining the tone of a fishing rod , wherein the obtained maximum curvature position for each load is determined as a tone characteristic of the fishing rod by marking the curvature distribution curve . A deflection curve indicating a deflection state for each load corresponding to a length position of the fishing rod when the different loads are applied to the fishing rod is written together with a curvature distribution curve for each load, and marking is performed at the maximum curvature position of each deflection curve. The method for determining the condition of a fishing rod according to claim 1, wherein:

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