JP2012034739A - Spike and spike shoes with the spike for baseball - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spike and spike shoes which has long service life and easily fits to feet and make wearing feeling good by keeping a shape according to individual differences of the movement and physical characteristics inherent to users in a long period of time while attaining high wearing resistance by the highly hard members.SOLUTION: The spike 10 has the protruding part 12 and the securing seat 11. The protruding part 12 is constituted of the distal end part 26 located at the distal end in the protruding direction and the body part 27 extending from the bent 13 to the distal end part 26. The body part 27 is constituted of a steel material for a carbon tool steel. The chips 22 are brazed to both the side end parts of a the body part 27. The chips 22 are constituted of a cemented carbide.

Description

  The present invention relates to a spike attached to the sole of a spike shoe for baseball.

  Conventionally, baseball spike shoes (hereinafter simply referred to as “spike shoes”) in which a plurality of metal spikes are attached to a shoe sole are known. Spike shoes grip the ground firmly when the spikes bite into the ground, and exhibit excellent slip resistance. If spikes are repeatedly digged into the ground when using spiked shoes, the spikes will wear due to contact between the ground sand and the spikes. Conventional spikes devised by paying attention to such wear are disclosed in Patent Document 1 and Patent Document 2. In this conventional spike, a wear-resistant metal tip is welded to the tip of the spike protrusion (claw-shaped portion).

Japanese Utility Model Publication No. 33-7465 JP-A-9-182606

  When spiked shoes are used, the spikes gradually wear, but the spikes attached to the sole do not wear evenly. That is, the wear rate of each spike is different. This is because the load is not evenly applied to all the spikes. For example, when running, a spike shoe user touches the foot of the foot and moves the foot to kick the ground between the first finger (thumb) and the second finger of the foot. Therefore, a load is applied mainly to the spikes on the first and second finger sides and the spikes on the outer side of the heel. In this case, the spikes on the first and second fingers and the spikes on the outer side of the heel are more easily worn than the spikes at other positions. In addition, when defending the infield, the user keeps a forward leaning posture, so that a load is applied mainly to the spike on the fingertip side. In this case, the spike on the fingertip side is more likely to be worn than the spike on other positions (for example, the heel side). The pitcher applies a load mainly to the spike on the tip end side of the shaft foot when throwing. In this case, the spike on the tip side of the shaft foot is more easily worn than the spikes at other positions. Of course, how to apply the load to the spike is not limited to the above case, but depends on factors such as user-specific movements and habits during running, hitting, throwing, and defensive, and individual differences in physical characteristics of the foot. Is also different. In any case, spikes of spike shoes that are usually used by the user are worn unevenly according to the above-mentioned factors specific to the user.

  By the way, in the brand new spike shoes, all the spikes are the same height and are not yet worn, so many users feel uncomfortable with the spikes when wearing the brand new spike shoes. Specifically, since the corners of the spikes have not been cut yet, the spikes do not bite against the ground and feel a sense of incongruity like wearing high clogs. In particular, sandy ground, which is frequently used in junior high school and high school school playgrounds, riverbed baseball stadiums, and the like, has a hard soil, so the spikes against the ground are extremely poor, and the above-mentioned uncomfortable feeling tends to be felt. In addition, because the spike height is uniform, the foot does not get used to the spiked shoes compared to the spiked shoes that the spike heights are irregular, and I feel uncomfortable. Such a sense of incongruity is a sensation that arises because the user feels good wearing comfort with respect to spikes whose heights are uneven according to the user's unique movements and individual differences in physical characteristics. In other words, many users feel uncomfortable with new spikes of uniform height. Of course, when worn for a while, each spike is worn according to the above-mentioned factors specific to the user, and eventually becomes a height and shape according to the factors specific to the user. Accordingly, the user's feet become familiar with the spiked shoes and gradually become comfortable.

  However, in the conventional spike described above, since the wear-resistant metal tip is provided at the tip, the wear hardly progresses even after repeated use. For this reason, the above-mentioned uncomfortable feeling with respect to the new spike cannot be immediately removed, and the user wears the spiked shoes for a long period of time in an uncomfortable state in which the user is not familiar with the foot. Wearing spiked shoes that are unfamiliar with the foot puts a burden on the lower back, ankles and soles of the foot, and in some cases may hurt the lower back. Also, since the soft spike body wears faster than the wear-resistant metal tip, constriction occurs between the wear-resistant metal tip and the spike body as the wear progresses. This constriction is not preferable because it causes breakage of the spike. In addition, if spikes broken at the constriction remain on the ground, unexpected injury may occur during baseball practice.

  Therefore, the present invention has been made in view of the above circumstances, and its purpose is based on an empirical rule that the wear rate of each spike varies depending on individual movements of the user and individual differences in physical characteristics of the foot. Paying attention, while realizing high wear resistance due to high hardness members, and maintaining a long shape according to individual differences in user-specific movements and physical characteristics, it has a long life and It is an object of the present invention to provide spikes and spiked shoes that are easy to get used to and are comfortable to wear.

(1) The present invention is a spike attached to the sole of a baseball spike shoe. The spike of the present invention includes a protruding piece and a high hardness member. The protruding piece is attached to the shoe sole so as to protrude from the surface of the shoe sole. The high-hardness member is provided on the body portion extending from the base end portion to the tip end portion of the protruding piece. The high hardness member is made of a material having a hardness higher than that of the protruding piece.

  The spike of the present invention is used with a spike shoe by being attached to a baseball spike shoe. A plurality of spikes are attached to the sole of the spiked shoe. The protruding piece is made of various steel materials such as carbon tool steel and carbon steel. The high hardness member is made of a cemented carbide having a hardness higher than that of the protruding piece.

  When a brand-new spike shoe with a spike of the present invention is used repeatedly, the corner of the protruding piece of the spike is taken by friction with the ground. As a result, the bite of the spike against the ground is improved, and there is no sense of incongruity like wearing a high clog. As the wear of the spike further progresses, the tip of the protruding piece becomes a shape according to factors such as user-specific movements and wrinkles, or individual differences in physical characteristics of the foot. As a result, the user's feet become familiar with the spiked shoes, and comfort is improved. As the wear of the spike further progresses, a high hardness member provided on the body of the protruding piece appears. Thereby, the wear rate of the spike is lowered by the high hardness member, so that the life of the spike is extended. In addition, the spike can be held for a long period of time in a shape according to the factors specific to the user.

(2) It is preferable that the high hardness member is provided at each of both end portions in the width direction of the body portion.

  As a result, the wear on both end portions of the body of the protruding piece is suppressed, so that the constriction caused by the difference in wear rate between the protruding piece and the high hardness member does not occur in the spike, and the loss of the spike is prevented. The

(3) Further, the high hardness member may be provided on the body part in a state of being separated in the width direction of the body part.

  As wear of the tip of the protruding piece progresses, a high hardness member appears on the tip side of the protruding piece. Thereafter, when the wear of the tip portion further proceeds, the soft portion sandwiched between the high hardness members spaced apart in the width direction is worn more than the high hardness member. At this time, when the spike is viewed from the side, the central portion in the width direction of the tip of the spike is depressed. In other words, both end portions in the width direction of the front end portion of the protruding piece have a shape protruding from the central portion. For this reason, the bite of the spike with respect to the ground becomes favorable, and the grip force is improved.

(4) The high hardness member includes a first member and a second member. A 1st member is arrange | positioned at the side end part of the width direction of the said trunk | drum. The second member protrudes from the first member toward the inside of the body portion.

  Thereby, the wear of the side end portion in the width direction of the protruding piece is suppressed by the first member, and further wear on the tip side is suppressed by the second member that appears on the tip side due to the wear. As a result, the lifetime of the spike is extended.

(5) The high-hardness member is brazed to the body by a brazing material having a melting point lower than that of the high-hardness member and the body.

  As a result, the high hardness member can be easily joined to the body portion, and can be mass-produced industrially.

(6) Further, the present invention may be regarded as a baseball spike shoe in which any of the spikes described above is attached to the shoe sole.

  According to the present invention, while realizing high wear resistance by a high hardness member, it is possible to maintain a long shape corresponding to user-specific movements and individual differences in physical characteristics of feet. As a result, a spike that has a long life and is easy to use can be realized.

FIG. 1 is a schematic diagram showing a configuration of a spike 10 according to an embodiment of the present invention. FIG. 1A is an external perspective view, and FIG. 1B is a cross-sectional view taken along a cutting line IB-IB. It is shown. FIG. 2 is a schematic diagram showing a state in which the spike 10 is attached to the shoe sole 50 for the left foot, where (A) shows the surface of the shoe sole 50 and (B) shows the cutting line IIB-IIB. A cross-sectional view is shown. FIG. 3 is a schematic perspective view for explaining a process of brazing the tip 22 to the projecting portion 12 of the spike 10. FIG. 3A shows a state where the tip 22 is not assembled. ) Shows a state in which the chip 22 is assembled. FIG. 4 is a schematic cross-sectional view showing the wear state of the spike 10A arranged on the inner side of the fingertip side and the spike 10B arranged on the heel. FIG. 5 is a schematic cross-sectional view showing the configuration of the spikes 101 to 106 according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate.

  FIG. 1A is a perspective view of a spike 10 according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a state in which the spike 10 is attached to the shoe sole 50. The spike 10 is used in a state of being fixed to a sole 50 (see FIG. 2A) of a spike shoe for baseball. A feature of the spike 10 is that a tip 22 (an example of a high-hardness member of the present invention) made of a high-hardness metal is provided on a protrusion 12 (an example of a protruding piece of the present invention) of the spike 10. is there. Hereinafter, the configuration of the spike 10 will be described in detail.

  As shown in FIG. 1A, the spike 10 is roughly divided into a mounting seat 11 that is embedded and fixed in the shoe sole 50, and a surface of the shoe sole 50 (the overhead wire 16 shown in FIG. 1B). Claw-like projecting portion 12 projecting vertically from. The spike 10 is formed by punching and bending a steel plate material having a thickness of 1.5 mm made of carbon tool steel (JIS G4401), so that the mounting seat 11 and the protrusion 12 are approximately 90 °. Formed into an L-shape. In addition, the thickness of the spike 10 can select an appropriate size in a range of approximately 1.0 mm to 2.5 mm in accordance with the shape of the protruding portion 12 and the degree of biting into the ground.

  Reinforcing ribs 15 are provided at bent portions 13 between the mounting seat 11 and the protruding portions 12. The reinforcing rib 15 is provided at the center of the bent portion 13 in the width direction 5. The reinforcing rib 15 is formed by embossing from the outside of the bent portion 13.

  Near the center of the mounting seat 11, a hole 17 that penetrates in the thickness direction of the mounting seat 11 is formed. In addition, protrusions 19 are provided at both ends of the bent portion 13 in the width direction 5. As shown in FIG. 2B, the holes 17 and the protrusions 19 are integrated by increasing the degree of adhesion between the shoe sole 50 and the mounting seat 11 when the mounting seat 11 is embedded in the shoe sole 50. Have a role. In the present embodiment, the shoe sole 50 is obtained by injection molding a synthetic resin material. As the synthetic resin material, thermoplastic polyurethane (TPU), polycarbonate (PC), vinyl chloride, nylon and the like can be considered.

  As shown in FIG. 2A, in this embodiment, six spikes 10 are attached to the toe side of the shoe sole 50, and four spikes 10 are attached to the heel side of the shoe sole 50. The method of embedding the mounting seat 11 in the shoe sole 50 is, for example, injecting the spike 10 in the stationary mold so that the mounting seat 11 is positioned at the center of the cavity of the stationary mold used for injection molding. The molding method or the shoe sole 50 is made into a two-layer structure of an outsole and a middle sole, the middle sole is injection-molded first, and then the mounting seat 11 is fixed to the joint surface of the middle sole with the outsole by bonding or the like. In addition, a method of injection molding the outsole can be considered. In this way, the mounting seat 11 is embedded in the shoe sole 50, so that the inside of the hole 17 and the periphery of the protrusion 19 are filled with synthetic resin. Thereby, since the attachment seat 11 is integrated with the shoe sole 50 and firmly attached, the removal of the spike 10 from the shoe sole 50 is prevented.

  As shown in FIG. 1, two chips 22 are provided on the body 27 of the protrusion 12. Here, the body portion 27 is a portion excluding the distal end portion 26 of the protruding portion 12, in other words, a portion extending from the bent portion 13 that is the proximal end portion of the protruding portion 23 to the distal end portion 26. The tip 22 is made of a material having a hardness higher than that of the protruding portion 12. Specifically, the tip 22 is made of tungsten carbide (tungsten carbide) which is a cemented carbide of HRA (Rockwell hardness A scale) 91.5. In the present embodiment, the chip 22 is provided at each of both end portions in the width direction 5 of the body portion 27, so that each chip 22 is disposed in the state separated from the body portion 27 in the width direction 5. ing.

  The chip 22 has a base portion 23 (corresponding to the first member of the present invention) and a flange portion 24 (corresponding to the second member of the present invention). In this embodiment, the chip 22 has a base portion 23 and a flange portion 24 formed integrally. Of course, the base part 23 and the collar part 24 may be separate members. The base portion 23 is disposed at a side end portion in the width direction 5 of the body portion 27 of the protruding portion 12. As shown in FIG. 1B, the base portion 23 extends from the surface of the shoe sole 50 (the overhead wire 16 shown in FIG. 1B) to the tip end portion 26. Therefore, the outer surface of the base portion 23 in the width direction 5 is exposed to the outside and forms the outer surface of the protruding portion 12. The flange portion 24 is bent in a hook shape from the tip of the base portion 23 (the end portion in the upward direction of the paper in FIG. 1) toward the inner side of the trunk portion 27.

  Each chip 22 is fixed to each end of the body 27 in the width direction 5. As a method for fixing the tip 22, for example, a method of brazing (waxing) using a copper brazing (an example of the brazing material of the present invention) having a melting point lower than that of the protruding portion 12 or the tip 22 is suitable. Specifically, as shown in FIG. 3, the chip 22 is assembled into a notch 29 (see FIG. 3A) cut in the same shape as the chip 22, and the joint between the chip 22 and the protruding portion 12 is assembled. After applying the paste-like copper brazing, the spike 10 is set in the furnace and heated until the copper brazing melts. Thereafter, by cooling, the chip 22 and the body portion 27 are brazed with a copper braze. Note that the heating method is not limited to heating in the furnace, and a method using Joule heat generated by passing a current through the joint or induction heating of a high-frequency heating coil may be employed. Moreover, although the copper brazing suitable for brazing steel was used as the brazing material, an appropriate brazing material may be selected according to the base material to be joined. The brazing material is not limited to a paste-like material, and a plate-like material or a linear (wire-like) material may be used.

Next, the wear process of each of the spike 10A and the spike 10B (see FIG. 2A) will be described with reference to FIG. Here, FIGS. 4A to 4C are diagrams showing the change over time of the wear state of the spike 10A, and FIGS. 4D to 4F are views showing the change over time of the wear state of the spike 10B. It is. As shown in FIG. 2A, the spike 10A is arranged on the inner side of the fingertip side in the shoe sole 50, and the load is the highest among the plurality of spikes 10 attached to the shoe sole 50. It is arranged at the place to be hung. The spike 10 </ b> B is disposed on the heel side of the shoe sole 50, and is disposed at a place where the load is least applied among the plurality of spikes 10 attached to the shoe sole 50. In FIG. 4, for easy understanding, the difference in the temporal change in the wear state of each of the spike 10 </ b> A and the spike 10 </ b> B is exaggerated.
At the mounting position

  The spike 10A in the unworn state (see FIG. 4A) gradually wears the tip portion 26 of the spike 10A by using spike shoes. Here, it is assumed that almost all of the tip end portion 26 of the spike 10A is worn when the predetermined period T1 has elapsed (see FIG. 4B). When spike shoes are further used from this state, the collar 24 of the tip 22 appears on the tip side of the spike 10A. As described above, since the tip 22 is made of cemented carbide, it is more resistant to wear than the tip portion 26. On the other hand, the central portion sandwiched between the tips 22 at both end portions is the same quality as the tip portion 26 and is therefore more easily worn than the tips 22. Therefore, as the wear further proceeds, as shown in FIG. 4 (C), wear is suppressed at both ends in the width direction 5 where the chip 22 is exposed, but the central portion is swept away so as to be U-shaped. Wear out.

  On the other hand, the spike 10B in the unworn state (see FIG. 4D) also gradually wears the tip portion 26 of the spike 10B by using spike shoes. However, since the load applied to the spike 10B is smaller than that of the spike 10A, as shown in FIGS. 4E and 4F, the tip portion 26 of the spike 10B is almost worn even after the period T1 has elapsed. Remain without.

  In addition, since the load applied to the side end portion of the spike 10 in the width direction 5 is smaller than that of the tip portion 26, and there is a base portion 23 of the chip 22 made of cemented carbide, FIGS. As shown in F), the side edges hardly wear.

  Since the spike 10 is thus configured, the corner of the tip portion 26 of the spike 10 is sharpened faster than the conventional spike made of cemented carbide. Therefore, the bite of the spike 10 with respect to the ground is improved early after the spike shoes are used, and the uncomfortable feeling of wearing high clogs is removed early.

  Further, as described above, the tip portion 26 of the spike 10 is worn according to the magnitude of the load on each spike 10. In other words, the spike 10 to which a large load is applied has a large amount of wear at the tip 26, and the spike 10 to which only a small load is applied has a small amount of wear at the tip 26. For this reason, the ground contact surface may vary depending on factors such as user-specific movements and habits during running, hitting, throwing, and defensive, or individual differences in physical characteristics such as foot shape, arch shape, and leg shape. When there is a difference in load distribution with respect to, each spike 10 is worn according to the applied load. As a result, the user's feet become familiar with the spiked shoes, and comfort is improved. Further, when the wear of the spike 10 further progresses and the collar portion 24 of the tip 22 is exposed at the tip portion, the wear speed of the spike 10 decreases, so that the shape of the spike 10 that fits the foot can be maintained for a long time.

  Moreover, since the base part 23 of the chip | tip 22 made from a cemented carbide is in the side edge part of the width direction 5 of the spike 10, the wear of a side edge part reduces drastically and the loss | disconnection of the spike by wear of a side edge part is prevented. Is done.

  Further, since the tip 22 is separated in the width direction 5 of the body portion 27, when the wear proceeds, the center portion is greatly worn as shown in FIG. 4C, and both end portions protrude from the center portion. It will be in the state. For this reason, as wear progresses, the bite of the spike 10 with respect to the ground becomes better, and the grip force with respect to the ground is improved.

  Further, as a method of fixing the tip 22 to the body portion 27, a method of brazing which joins both the tip 22 and the body portion 27 without melting them is adopted, so that resistance welding for melting and joining the base materials is adopted. Compared to arc welding, less melted meat is required at the joint. Therefore, surface treatment such as polishing after bonding can be simplified.

  In the above-described embodiment, the projecting portion 12 of the spike 10 is formed of carbon tool steel, but may be formed of general carbon steel (also called ordinary steel) that is an alloy of iron and carbon. Absent. Further, the chip 22 is made of cemented carbide, but this is merely an example, and any material may be used as long as the material of the chip 22 is higher in hardness than the material of the protruding portion 12. . Furthermore, the material of the protruding portion 12 and the tip 22 of the spike 10 is not limited to steel, and any material suitable for the spike 10 such as ceramic or high-hardness plastic may be used.

  In the above-described embodiment, the brazing method is employed as a method for fixing the tip 22 and the body portion 27, but a technique such as spot welding or resistance welding may be employed.

  The spike 10 described in the above-described embodiment is a so-called embedded type that is fixed by being embedded in the sole 50 of a baseball spike shoe. The present invention is also applicable to a type (replacement type) type spike.

  The above-described embodiment is merely an example in which the spike of the present invention is embodied. This embodiment can be changed as appropriate within the range that does not change the gist of the present invention, such as spikes 101 to 106 shown in the respective examples described below.

  Hereinafter, another embodiment of the spike of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram showing the configuration of the spikes 101 to 106 according to the embodiment of the present invention. In addition, about the same component as the above-mentioned embodiment, the code | symbol of the same number is attached | subjected and shown in FIG. 5, and the description is abbreviate | omitted.

  FIG. 5A is a schematic cross-sectional view of the spike 101. The spike 101 is obtained by fixing a U-shaped tip 221 to the body portion 27. The chip 221 includes a base portion 231 disposed at each of both end portions in the width direction 5 of the body portion 27, and a bridge 241 that connects these base portions 231.

  FIG. 5B is a schematic cross-sectional view of the spike 102. The spike 102 is obtained by fixing a straight tip 222 long in the width direction 5 to the body portion 27. Both end portions in the width direction 5 of the chip 222 are exposed on both side surfaces of the body portion 27.

  FIG. 5C is a schematic cross-sectional view of the spike 103. The spike 103 is obtained by fixing a straight chip 223 that is long in the width direction 5 to the body 27. Both ends of the chip 223 in the width direction 5 are not exposed on both side surfaces of the body portion 27, but are embedded in the body portion 27.

  FIG. 5D is a schematic cross-sectional view of the spike 104. The spike 104 is obtained by fixing a chip 224 to each of both end portions of the body portion 27 in the width direction 3. The chip 224 has a straight shape that is long in the protruding direction of the protruding portion 12 (vertical direction in the plane of FIG. 5). The thickness of the chip 224 in the width direction 5 is sufficiently smaller than the width of the body portion 27.

  FIG. 5E is a schematic cross-sectional view of the spike 105. The spike 105 is obtained by fixing the chip 225 to each of both end portions in the width direction 5 of the body portion 27. The chip 225 is in the form of a block that is long in the protruding direction of the protruding portion 12 (vertical direction in the plane of FIG. 5). The thickness of the chip 224 in the width direction 5 is slightly smaller than half the width of the body portion 27.

  FIG. 5F is a schematic cross-sectional view of the spike 106. As with the spike 10 described above, the tip 226 is fixed to each of both end portions of the body portion 27 in the width direction 5 of the spike 106. The chip 226 has a flange portion 246 formed at the tip of the base portion 23 (the end portion in the downward direction of the paper in FIG. 5). The heel portion 146 has a shape that is bent approximately 90 degrees toward the inside of the body portion 27 and then bent approximately 90 degrees toward the shoe sole 50 side. Since the chip 226 is formed in such a shape, the contact area between the body 27 and the chip 226 is increased. Thereby, the joining force when fixed by brazing is improved.

10, 101-106 ... spike 11 ... mounting seat 12 ... projection 13 ... bent portion 15 ... reinforcing rib 16 ... overhead wire 17 ... hole 19 ... projection 22 , 221 to 226... Tip 26... Tip portion 27... Trunk portion 29.

Claims (6)

A spike attached to the sole of a baseball spike shoe,
Nail-like protruding pieces attached to the shoe sole so as to protrude from the surface of the shoe sole;
A spike comprising: a high-hardness member provided on a body portion extending from a base end portion to a distal end portion of the protruding piece and made of a material having a hardness higher than that of the protruding piece.   The spike according to claim 1, wherein the high-hardness member is provided at each of both end portions in the width direction of the trunk portion.   The spike according to claim 1 or 2, wherein the high-hardness member is provided in the body part in a state of being separated in a width direction of the body part. The high hardness member is
The spike according to claim 3, further comprising: a first member disposed at a side end portion in the width direction of the trunk portion; and a second member projecting from the first member toward the inner side of the trunk portion.   The spike according to any one of claims 1 to 4, wherein the high-hardness member is brazed to the body by a brazing material having a melting point lower than that of the high-hardness member and the body. A spike shoe for baseball, wherein the spike according to any one of claims 1 to 5 is attached to a shoe sole.

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