JP3815742B2 - Spearhead - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to the tip of a kite used, for example, as a kite or a boat.
[0002]
[Prior art]
Conventionally, a prepreg in which glass fiber or carbon fiber is used as a reinforcing fiber is wound into a hollow shape as a spear tip, and cured and painted by a conventional method to be assembled.
[0003]
[Problems to be solved by the invention]
In the case of the above glass fiber, since it is a fiber having a relatively low tensile modulus, it can be made soft as a tip, and it has a characteristic that it is easy to hit with a point tone, but it is a mid-rib Since the difference in stiffness (tensile modulus) is too large, it is difficult to make a continuous bend, and when trying to match the condition with the head, etc., the wall thickness becomes thick and as a result the tip is heavy Become. Then, even if the weight increase of the tip was slight, it was difficult to handle by weight because it greatly affected the overall condition of the carp during actual fishing.
On the other hand, in the case of using carbon fiber, since it is a fiber having a relatively high tensile elastic modulus with a tensile elastic modulus of about 24 TON / mm ² or more in general, it has a characteristic that it is easy to match the tone with the head, Although it has high rigidity but little elongation, it has a tendency to break easily due to yarn entanglement.
Only the tip part is solid with respect to the hollow tip as described above, and there is a tip connecting the solid tip part and the rear hollow part, but the solid tip part and the hollow rear part Are difficult to connect, making connection difficult, and lack of continuity of stress at the joint.
An object of the first invention is to provide a tip that is easy to hit as a tip, is easy to adjust the tone with the tip, has good continuity of stress, and can reduce the weight of the tip as a whole.
[0004]
[Means for Solving the Problems]
The characteristic configuration according to the first aspect of the present invention has a length from the tip end portion of the tip of the heel to the end of the buttock, and compared with the first prepreg (1) made of the first reinforcing fiber and the resin, and the first prepreg (1). The second prepreg (3) consisting of a second reinforcing fiber and a resin, which has a short axial core length and coincides with the butt end and has a higher tensile elastic modulus than the first reinforcing fiber, and a carbon-based reinforcing fiber are aligned. The reinforcing pattern obtained by polymerizing the prepreg and the glass cloth is wound as the butt end and arranged so as to overlap each other as the inner and outer layers, and the tip end portion of the first prepreg (1) is connected to the second prepreg ( It is formed in a state protruding from the tip of 3), and the function and effect thereof are as follows.
[0005]
[Action]
(1) Since the tip of the first prepreg is wound in a state of protruding from the tip of the second prepreg, this portion has a low tensile elastic modulus and is soft and easy to hit.
(2) Moreover, the buttock side from the tip is overlapped with a prepreg having reinforcing fibers with both high and low tensile elastic moduli. It is easy, and it is not necessary to take a method of increasing the weight of the bag, such as increasing the wall thickness for the purpose of adjusting the tone.
(3) Since the prepregs having both high and low tensile elastic modulus are overlapped, the rigidity is appropriate and the elongation is large compared to the prepreg having the high tensile elastic modulus reinforcing fiber. It is difficult to cut even in the case of.
(4) Since prepregs having both high and low tensile elastic moduli are overlapped, the continuity of stress with the head is improved, and breakage at the joint can be avoided.
[0006]
【The invention's effect】
As a result, the hollow point and the action (2) can achieve weight reduction and provide easy handling for fishing, and the action (3) (4) distributes stress in a balanced manner as a whole. However, as shown in the action (1), it is possible to provide a structure that is easy to win, and it is possible to provide a spear tip that is highly practical as a whole.
The object of the second invention is to provide an easy-to-handle salmon tip by finely selecting the tensile elastic modulus as a prepreg in addition to the object of the first invention.
[0007]
[Means for Solving the Problems]
The characteristic configuration according to the second aspect of the present invention includes a first reinforcing fiber having a medium tensile elastic modulus having a length from the tip end portion of the heel tip to the heel end and a tensile elastic modulus of 19 TON / mm ² or less, a thermosetting resin, The first prepreg (1) and the first prepreg (1) are short in axial length compared to the first prepreg (1) and have a high tensile elastic modulus with a tensile elastic modulus of 24 TON / mm ² or more. 2 The second prepreg (3) composed of a reinforcing fiber and a thermosetting resin, and a reinforcing pattern obtained by laminating a longitudinal fiber and a short circumferential fiber disposed on the inside are wound as the butt end, The tip of the tip of the first prepreg (1) is formed by winding in a state of protruding from the tip of the second prepreg (3), and the function and effect thereof are as follows.
[0008]
[Action]
In addition to the first action, there is the following action. That is, by adopting the medium tensile elastic modulus reinforcing fiber as the first prepreg, the portion protruding from the tip of the second prepreg is less susceptible to fish pulling than when using the low tensile elastic modulus reinforcing fiber. In addition, while maintaining a certain degree of rigidity and suppressing extreme bending, the softness is higher than in the case of using a reinforcing fiber having a high tensile elastic modulus, and the response to the hit can be improved accordingly. Moreover, on the buttock side from the tip, it is composed of reinforcing fibers with high and medium tensile elastic modulus. The change in the tensile modulus of elasticity when applied is made gentle to ensure continuity of stress.
【The invention's effect】
As a result, the continuity of tone and stress determined by the tensile elastic modulus can be improved, and an easy-to-use heel tip can be provided.
[0009]
【Example】
A method of forming a ridge using the mandrel 2 will be described step by step.
(1) As shown in FIG. 1, a first prepreg 1 impregnated with a thermosetting resin such as epoxy is wound around a mandrel 2 on a glass woven fabric made of a satin weave made of glass or the like having a medium tensile elastic modulus. .
(2) As shown in FIG. 1, carbon-based reinforcing fibers having a high tensile modulus aligned in the axial direction are aligned, and the aligned reinforcing fibers are impregnated with a thermosetting resin such as epoxy. The 2 prepreg 3 is wound around the first prepreg 1 wound around the mandrel 2. The second prepreg 3 has a shorter axial core length than the first prepreg 1, and is wound with its butt end aligned with the butt end of the first prepreg 1. As a result, the tip end portion of the first prepreg 1 protrudes from the tip end of the second prepreg 3. The tip 3a of the second prepreg 3 is cut obliquely so as to be slightly inclined as shown in the figure wound around the first prepreg 1. As a result, the continuity of the stress is improved at the joint portion where the first prepreg 1 and the second prepreg 3 are overlapped from the tip portion of only the first prepreg 1.
{Circle around (3)} As shown in FIG. 1, a so-called C.I. polymerized polymer obtained by polymerizing a prepreg in which carbon-based reinforcing fibers having a high tensile modulus are aligned and a thin glass cloth. G. The cross is used as the reinforcing pattern 4 and wound around the butt end portion to form the heel material 5.
(4) Although not shown, a forming tape such as polyester is wound around the outer peripheral surface of the bag material 5 in a spiral shape and fired.
{Circle around (5)} After firing, the molding tape is peeled off, the punched material 5 is cut into a predetermined length, and polishing, painting, etc. are performed in a conventional manner, and the parts are assembled and assembled into a punch.
The physical properties of the above-mentioned reinforcing fiber are as follows. In the glass fiber called the middle elastic fiber, the density is 2.5 g / cm ³ , the tensile strength is 340 KG / mm ² , the tensile elastic modulus is 7 TON / mm ² , and the elongation is 3% to 5%. In the carbon fiber referred to as a highly elastic fiber, the density is 1.8 g / cm ³ , the tensile strength is 340 to 500 KG / mm ² , the tensile elastic modulus is 24 TON / mm ² , and the elongation is 1% to 3%.
[0010]
[Another Example]
{Circle around (1)} As shown in FIG. 2, the first prepreg 1 and the second prepreg 3 may be wound inside and outside. That is, the second prepreg 3 in which carbon-based reinforcing fibers having a high tensile elastic modulus are aligned in the axial direction and the aligned reinforcing fibers are impregnated with a thermosetting resin such as epoxy is wound around the mandrel 2.
Next, the first prepreg 1 obtained by impregnating a glass reinforced fiber cloth having a medium tensile elastic modulus with a thermosetting resin such as epoxy is wound around the second prepreg 3. The first prepreg 1 has a longer axial core length than the second prepreg 3, and is wound with the butt end aligned with the butt end of the second prepreg 3. Then, the tip of the first prepreg 1 protrudes from the tip of the second prepreg 3.
(2) As the first prepreg 1, the second prepreg 3, and the reinforcing pattern 4, the following C.I. C. An aligned prepreg may be used. That is, a so-called C.I. made by bonding longitudinal fibers and short circumferential fibers together. C. An aligned prepreg may be used. In this case, it is necessary to arrange the circumferential fibers inward.
{Circle around (3)} The tensile elastic modulus of the reinforcing fiber used for the two prepregs 1, 3 should be larger in the second prepreg 3 than in the first prepreg 1. And preferably, a tensile elastic modulus of the reinforcing fiber used for the first prepreg 1 is selected to be 19 TON / mm ² or less. Accordingly, the glass fiber is not necessarily limited, and a kevlar or the like can be used. Furthermore, carbon fiber may be used as long as the tensile elastic modulus is 19 TON / mm ² or less. Moreover, what is necessary is just to select the thing of 24TON / mm < ² > or more as a tensile elasticity modulus of the reinforced fiber used for the 2nd prepreg 3. FIG. Therefore, it is not necessarily limited to carbon fiber, and boron or the like can be used.
(4) As the resin impregnated in the reinforcing fiber, a thermosetting resin such as a phenol resin other than epoxy is used, but a thermoplastic resin may be used.
(5) The prepreg may be a prepreg that is not a line of reinforcing fibers but a cloth arranged in a cloth.
[0011]
It should be noted that reference numerals are used in the claims to make the comparison with the drawings convenient, but the present invention is not limited to the configuration of the attached drawings by the entry.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which prepregs are sequentially formed on a wound rivet material. FIG. 2 is different from the case of FIG. 1 in that the first prepreg and the second prepreg are wound inward and outward to form a ridge material. Side view showing the condition [Explanation of symbols]
1 First prepreg 2 Mandrel 3 Second prepreg

Claims (2)

A first prepreg (1) having a length from the tip end portion of the heel to the butt end and having a first reinforcing fiber and a resin, and having a shorter axial core length than the first prepreg (1), A second prepreg (3) made of a second reinforced fiber and a resin, which coincides with the ends and has a higher tensile elastic modulus than the first reinforced fiber, and a reinforced prepreg formed by arranging carbon-based reinforced fibers and a glass cloth. In a state where the pattern is wound as the butt end and overlapped with each other as inner and outer layers, and the tip end portion of the first prepreg (1) protrudes from the tip of the second prepreg (3). A spearhead that has been formed. A first prepreg (1) comprising a first reinforced fiber having a medium tensile elastic modulus and a thermosetting resin having a length from the tip end of the heel to the butt end and a tensile elastic modulus of 19 TON / mm ² or less; A second reinforcing fiber having a high tensile elastic modulus, which has a shorter axial core length than that of the first prepreg (1) and coincides with the butt end and has a tensile elastic modulus of 24 TON / mm ² or more, and a thermosetting resin, The second prepreg (3) and the reinforcing pattern obtained by bonding the longitudinal fibers and the short circumferential fibers disposed inside are wound as the butt end, and the first prepreg (1) A spear tip formed by winding in a state where a tip end portion of the tip protrudes from a tip of the second prepreg (3).

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