JP2011115613A - Method for manufacturing bat for baseball or soft ball - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bat for baseball or soft ball excelling in flying distance performance while effectively and efficiently attaining a reduction in the manufacturing cost. <P>SOLUTION: A method for manufacturing the bat for baseball or soft ball with a three-dimensional resin pattern 8 formed on the outer peripheral surface of a ball hitting part 1 on the tip side of a bat body 4 is carried out by transferring an uneven sheet 6 made of a resin and formed in uneven surface shape on the outer surface, to the outer peripheral surface of the ball hitting part 1, coating an area including at least the whole outer surface of the uneven sheet 6 of the bat body 4 to which the uneven sheet 6 is transferred, with resin to coat the area with a film-like body 7, thus forming the three-dimensional resin pattern 8 at the ball hitting part 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a baseball or softball bat, and more particularly to a method for manufacturing a baseball or softball bat in which a three-dimensional pattern is formed on the outer peripheral surface of a hitting ball portion on the tip side of a bat body.

  In this type of baseball or softball bat, by forming a three-dimensional pattern on the outer peripheral surface of the hitting ball portion, the surface area of the hitting ball portion is increased along with the three-dimensional hitting ball portion, and the geometric engagement force is increased. As a result, the sliding resistance between the hit ball portion and the ball at the time of hitting can be increased to increase the flight distance, and a visually noticeable impression can be given to the consumer.

  And conventionally, what engraved a groove group (an example of a three-dimensional pattern) along the bat length direction on the outer peripheral surface of a hitting portion of a metal bat body is known (for example, see Patent Document 1 below). .

Japanese Utility Model Publication No. 48-90766

  However, in the above-mentioned conventional baseball or softball bat in which a three-dimensional pattern is engraved on the bat body itself, the thickness of the bat main body is reduced by the engraving of the three-dimensional pattern. It is necessary to design and manufacture a dedicated bat body with a thickness that takes into account the engraving, and also requires a machine tool for engraving that performs knurling, polishing, or polishing, resulting in high manufacturing costs. There was a problem.

  In particular, in the case of a bat to be coated (generally, a wooden bat or an FRP bat), there is a problem that it is difficult to engrave a three-dimensional pattern because it cannot be polished or polished.

  In view of this situation, the main problem of the present invention is to effectively and efficiently solve the above problems.

  In a baseball or softball bat, a resin concavo-convex sheet having an outer surface formed in a concavo-convex shape is transferred to the outer peripheral surface of a hitting portion on the tip side of the bat main body, and at least the entire area of the bat main body or at least the concavo-convex sheet A resin-made three-dimensional pattern may be formed on the hit ball portion by coating a region including the entire outer surface with a resin-made film.

  According to the above configuration, since the thickness of the bat body does not decrease before and after the formation of the three-dimensional pattern, it becomes possible to use a bat body having the same specification as that without the three-dimensional pattern, and thereby, the common specification of the bat body can be made. Can be planned.

  Further, since the three-dimensional pattern of the hit ball portion is made of a resin that can be expected to be elastically deformed at the time of hitting, the slip resistance of the ball is further increased in a state where the contact area with the ball is instantaneously expanded by the elastic deformation at the time of hitting. It is possible to increase the flight distance performance, and it is also possible to expect a reduction in energy loss due to the deformation of the ball due to the absorption action due to the elastic deformation at the time of hitting.

  In addition, the main work for constructing the three-dimensional pattern is a simple work that does not require a large machine tool such as a transfer operation of the concavo-convex sheet, so that the manufacturing equipment can be downsized and the manufacturing time can be shortened. it can.

  Furthermore, since the entire region of the bat body or the region including at least the entire outer surface of the concavo-convex sheet is coated with a resinous film-like body, the ruggedness is affected by the impact force at the time of hitting by the restraining action and the protective action by the film-like body. It can suppress that a sheet | seat (especially convex part) breaks or an uneven | corrugated sheet peels. Moreover, since the form of the convex part of an uneven | corrugated sheet | seat can be made into a curved surface with a film-form body, the feeling at the time of the hitting ball obtained by a solid pattern can also be made good.

  From these, it is possible to obtain a bat that has excellent flight distance performance while effectively and efficiently reducing the manufacturing cost, and it is also possible to easily apply a three-dimensional pattern to a bat to be painted. I can do it now.

  The transfer of the uneven sheet may be either thermal transfer or water transfer, but water transfer is preferable from the viewpoint of ease of work and beautiful finish.

  Moreover, you may form a different said three-dimensional pattern in the adjacent said division area about the division area which divided | segmented the said hitting ball part into the plurality in the bat circumferential direction.

  According to the above configuration, since a plurality of types of hitting feelings based on a three-dimensional pattern can be selected depending on the angle at which the bat body is gripped, different hitting feelings can be used depending on the tone and mood for batters who prefer a hitting feeling based on a three-dimensional pattern. It is possible to make it easy, and it is also possible to achieve common specifications for a plurality of batters having different hit feelings due to a three-dimensional pattern.

  Further, the three-dimensional pattern may be formed in a part of the divided areas obtained by dividing the hit ball portion into a plurality of parts in the bat circumferential direction.

  According to the above configuration, the hit feeling by the three-dimensional pattern (that is, the use state of the divided area with the three-dimensional pattern) and the hit feeling without the three-dimensional pattern (that is, the use state of the divided area without the three-dimensional pattern) depending on the angle at which the bat body is gripped. It is possible to use different hit feelings depending on the tone and mood, and it can be used easily. For batters who prefer a three-dimensional pattern and a normal hit feeling that does not depend on a three-dimensional pattern. It is also possible to achieve common specifications with the preferred batter.

  Further, to form the three-dimensional pattern, an annular ridge having an inner diameter smaller than that of the ball may be formed in a state where the center is located at the central portion in the bat length direction on the outer peripheral surface of the hitting ball portion. .

  Normally, the central part of the hitting ball portion in the bat length direction is the part having the highest flight distance performance, but according to the above configuration, when captured at the part having the highest flight distance performance, It is possible to prevent the ball from moving momentarily in a state where it is captured by an annular ridge, and the maximum flight distance performance can be effectively enhanced.

  The annular ridges are not limited to those that are continuous in an annular shape, but may be those that are discontinuous but have an annular shape as a whole.

  In addition, to form the three-dimensional pattern, a plurality of ridges intersecting the bat axis when viewed from the front are formed in a state of being aligned along the bat length direction with an interval smaller than the outer diameter of the ball. May be.

  According to the above configuration, since the movement of the ball toward the bat tip side at the time of hitting can be suppressed by the plurality of ridges intersecting the bat axis, the flight distance loss at the time of hitting can be effectively reduced. The flight distance performance can be stabilized.

  Further, in order to form the three-dimensional pattern, a plurality of concentric annular or partial annular ridges having different inner diameter dimensions, the center of which is located at the central portion in the bat length direction on the outer peripheral surface of the hitting ball portion, are formed. May be.

  According to the above configuration, it is possible to allow the batter to recognize the central portion in the bat length direction where the flight distance performance is highest at a glance.

  The annular ridges are not limited to those that are continuous in an annular shape, but may be those that are discontinuous but have an annular shape as a whole. Further, the partial annular ridges are not limited to those that are continuous in the partial annular shape, but may be discontinuous but may form a partial annular shape as a whole.

The first characteristic configuration of the present invention is a method of manufacturing a baseball or softball bat in which a three-dimensional pattern made of resin is formed on the outer peripheral surface of the hitting ball portion on the tip side of the bat body,
A resin concavo-convex sheet having an outer surface formed into a concavo-convex shape is transferred to the outer peripheral surface of the hitting ball portion, and a resin is applied to a region including at least the entire outer surface of the concavo-convex sheet of the bat body to which the concavo-convex sheet is transferred. By coating the region and coating the region with a film-like body, a resin-made three-dimensional pattern is formed on the hit ball portion.

  The second characteristic configuration of the present invention is that the uneven sheet is transferred to the outer peripheral surface of the hitting portion of the bat body in order to transfer the uneven sheet to the outer peripheral surface of the hitting ball portion.

  According to a third characteristic configuration of the present invention, a resin is applied to the entire area of the bat body as an area including at least the entire outer surface of the rug body of the bat body to which the uneven sheet is transferred. The whole area is coated with a film-like body.

Baseball or softball bat appearance Baseball or softball bat appearance Enlarged external view of baseball or softball bat Cross-sectional illustration of a baseball or softball bat Explanatory drawing which shows the manufacturing method of a baseball or a softball bat Explanatory drawing showing transfer method of uneven sheet Enlarged external view of a baseball or softball bat in another embodiment

  1 to 4 show a bat for baseball or softball. The bat includes a substantially large-diameter cylindrical hitting ball portion 1 on the distal end side, a substantially small-diameter cylindrical grip portion 2 on the proximal side, and the hitting ball portion. A hollow FRP bat main body 4 having a substantially tapered cylindrical taper portion 3 that smoothly connects 1 and the grip 2 is provided as a basic configuration.

  A non-slip tape 5 made of leather is wound around the grip portion 2, and a disc-shaped grip end 18 is formed at the proximal end of the grip portion 2.

  Then, the rugged sheet 6 made of epoxy resin (an example of resin) whose outer surface is formed into a rugged surface shape is transferred to the outer peripheral surface of the hitting portion 1 of the bat body 4 and the entire area of the bat body 4 is made of urethane resin. By coating with the film-like body 7 (an example of resin), a transparent three-dimensional pattern 8 made of resin is formed on the hitting portion 1 of the bat body 4.

  The concavo-convex sheet 6 is configured by raising and forming a ridge forming portion 6b and a ridge forming portion 6c for forming the three-dimensional pattern 8 on the outer surface of a planar substrate 6a. The thickness of the concavo-convex sheet 6 in the ridge forming portion 6b and the ridge forming portion 6c is preferably 0.08 mm to 0.16 mm, and in this example, it is about 0.12 mm, and the ridge forming portion 6b and the protruding portion are formed. The thickness of the concavo-convex sheet 6 at a portion other than the portion 6c (that is, the sheet thickness at the concave portion) is about half or smaller than the thickness of the concavo-convex sheet 6 at the ridge forming portion 6b or the convex portion forming portion 6c. It is.

  Moreover, in this example, the two uneven | corrugated sheets 6 of the same shape (an example of several sheets) are transcribe | transferred by the outer peripheral surface of the hit ball | bowl part 1 in the state aligned along the bat circumferential direction. The film-like body 7 is made of urethane resin and has a thickness dimension of 0.01 mm to 0.1 mm, in this example, about 0.02 mm to 0.03 mm (that is, bat body 4 in this example). The dimension from the outer peripheral surface to the surface of the film-like body 7 on the ridge forming portion 6b and the protruding portion forming portion 6c is set to about 0.14 mm to 0.15 mm.

  As the three-dimensional pattern 8, two different types (one example of a plurality of types) of the first three-dimensional pattern 9 made of a ridge group and the second three-dimensional pattern 10 made of a convex portion group are formed. The first three-dimensional pattern 9 and the second three-dimensional pattern 10 are formed in a state in which the hitting ball portion 1 is alternately arranged in the bat circumferential direction in the divided area 1A obtained by dividing the hitting ball portion 1 into four (a plurality of examples) in the bat circumferential direction. . That is, different three-dimensional patterns 8 are formed in adjacent divided areas 1A.

  The first three-dimensional pattern 9 includes a plurality of concentric (a plurality of examples) annular ridges 11 and a plurality of (a plurality of) a plurality of concentric inner diameters in which the center C is located at a central portion in the bat length direction of the hitting ball portion 1. (Example) of the partial annular ridge 12.

  The ridges 11 and 12 are formed in a state of being arranged along the bat length direction with an interval smaller than the outer diameter of the ball (in this example, an interval of about 2 mm), and the annular ridges. Of the 11, the inner four (a plurality of examples) are configured to have an inner diameter smaller than the ball.

  In the present embodiment, the annular ridge 11 and the partial annular ridge 12 correspond to a ridge that intersects the butt axis Y in the front view.

  The second three-dimensional pattern 10 is composed of a plurality of convex portions 13 having a partial spherical shape (a plurality of examples). The convex portions 13 are grouped in a state in which characters are formed with an interval (in this example, an interval of about 2 mm) smaller than the outer dimension of the ball. In this example, five characters are formed by a group of five (a plurality of examples) convex portions 13 along the bat longitudinal direction.

  Next, a method for manufacturing a baseball or softball bat constructed as described above will be described.

  As shown in FIG. 5 (a), the outer peripheral surface of the hitting portion 1 of the bat body 4 coated with a flat sheet 14 on which a display 14a such as a manufacturer name or a product name is silkscreen printed (an example of printing) is appropriately applied. Water transfer (an example of transfer). Although illustration is omitted, the same flat sheet 14 is also water-transferred to the back side in the figure facing in the bat radial direction.

  The display 14a is configured such that the length dimension in the bat width direction becomes smaller toward the butt hand side corresponding to the outer peripheral length of the bat body 4 becoming smaller toward the bat hand side. Therefore, the display 14a is formed in the arc region having the same angle as viewed from the bat cross section.

  Next, as shown in FIG. 5B, the uneven sheet 6 is water-transferred (an example of transfer) from the top of the flat sheet 14 to the outer peripheral surface of the hitting portion 1 of the bat body 4. Although not shown, the same concavo-convex sheet 6 is also water-transferred to the back side in the figure facing in the bat radial direction.

  As shown in FIG. 6 (a), the uneven sheet 6 has water sandwiched between a backing sheet 15 (release paper) made of a water-permeable material and a protective sheet 16 before the hitting portion 1 is transferred. It is configured as a transfer seal 17. An adhesive layer (not shown) made of a water-soluble adhesive is interposed between the mount 15 and the uneven sheet 6 in the water transfer seal 17.

  The concavo-convex sheet 6 is formed by performing silk screen printing (an example of printing) three times (an example of printing) on the outer surface of the planar substrate 6a to form the ridge forming part 6a and the convex part forming part 6c. It is configured. Specifically, the number of meshes for silk screen printing is 30 mesh for the first time, 60 mesh for the second time, and 100 mesh for the third time. Incidentally, the number of meshes of the display 14a is 200 to 250 meshes.

  In order to transfer the concavo-convex sheet 6 to the outer peripheral surface of the hitting portion 1 of the bat main body 4, as shown in FIG. 6 (b), the water transfer seal 17 is immersed in water and the mount 15 is removed. By pressing the laminate of the sheet 6 and the protective sheet 16 against the outer peripheral surface of the hitting ball portion 1, the uneven sheet 6 is attached to the outer peripheral surface of the hitting ball portion 1, and then the protective sheet 16 is attached as shown in FIG. Remove from the uneven sheet 6. The water transfer method for the flat sheet 14 is the same.

  Then, as shown in FIG. 5 (c), urethane resin is applied to the entire area of the bat body 4 from above the uneven sheet 6, and the entire area of the bat body 4 is coated with the film-like body 7. Before coating with the film-like body 7, a primer (not shown) may be appropriately applied.

  As shown in FIG. 5 (d), when the membrane 7 is sufficiently dried, a non-slip tape 5 is wound around the outer peripheral surface of the grip portion 2 of the bat body 4 to complete a baseball or softball bat. To do.

[Another embodiment]
The specific configuration such as the size and shape of the three-dimensional pattern 8 is not limited to that shown in the above-described embodiment, and various configuration changes can be made. For example, a linear, angular ring-shaped or partial angular ring-shaped convex strip 19 or a columnar or rectangular strip convex portion may be formed. Further, for example, as shown in FIG. 7, even if a large number (a plurality of examples) of linear ridges 19 are formed along the bat axis Y in a front-facing view to form the three-dimensional pattern 8. Good.

  In the above-described embodiment, as the ridges 11 and 12 that intersect the bat axis Y in the front view, the ridges 11 and 12 that are orthogonal (or substantially orthogonal) to the bat axis Y in the front view are shown as examples. However, it may be a ridge that obliquely intersects the bat axis Y in a frontal view.

  In the above-described embodiment, the case where the three-dimensional pattern 8 is transparent has been described as an example, but may be opaque or translucent.

  In the above-described embodiment, an example in which the entire region of the bat body 4 is coated with the film-like body 7 is shown as an example. However, the region corresponding to the entire outer surface of the uneven sheet 6 or the entire outer surface of the uneven sheet is included. A region wider than the concavo-convex sheet 6 may be coated with the film-like body 7. In short, the region including at least the entire outer surface of the concavo-convex sheet 6 may be coated with the film-like body 7.

  In the above-described embodiment, the case where the three-dimensional pattern 8 is formed in the adjacent divided region 1A is shown as an example for the divided region 1A obtained by dividing the hitting ball portion 1 into a plurality of portions in the bat circumferential direction. A configuration in which the three-dimensional pattern 8 is formed in some of the divided regions 1A (in other words, a configuration in which the three-dimensional pattern 8 is not formed in some of the divided regions 1A of the divided regions 1A) or of the divided regions 1A The same solid pattern 8 may be formed in all the divided areas 1A.

  In the above-described embodiment, the case where printing is performed on the outer surface of the planar substrate 6a to configure the concavo-convex sheet 6 is shown as an example, but the adhesive layer 6 on the mount is the planar substrate 6a. You may print on the outer surface of the contact bonding layer 6 with a form.

  In the above-described embodiment, the case where the concavo-convex sheet 6 is water-transferred to the outer peripheral surface of the hitting portion 1 of the bat main body 4 has been described as an example. It may be.

  In the above-described embodiment, the case where the uneven sheet 6 is made of an epoxy resin is shown as an example. However, a synthetic resin such as a urethane resin, an acrylic resin, or a polyethylene resin, or a natural resin may be used.

  Similarly, in the above-described embodiment, the case where the film-like body 7 is made of a urethane resin has been shown as an example. However, a synthetic resin such as an acrylic resin, a polyethylene resin, or an epoxy resin, or a natural resin may be used. Good.

  In the above-described embodiment, the case where the bat main body 4 is made of FRP has been described as an example, but may be made of metal such as aluminum (for example, aluminum) or wooden.

  According to the present invention, a bat excellent in flight distance performance can be obtained, but the present invention can also be applied to a bat that intentionally suppresses flight distance performance from the viewpoint of safety or use as a toy. .

DESCRIPTION OF SYMBOLS 1 Hitting part 1A Division | segmentation area | region 4 Bat | bowl main body 6 Uneven | corrugated sheet 7 Film-like body 8 Three-dimensional pattern 11, 12 Convex streak C Center Y Bat axis

Claims (3)

A method for producing a baseball or softball bat in which a three-dimensional pattern made of resin is formed on the outer peripheral surface of the hitting ball portion on the tip side of the bat body,
A resin concavo-convex sheet having an outer surface formed into a concavo-convex shape is transferred to the outer peripheral surface of the hitting ball portion, and a resin is applied to a region including at least the entire outer surface of the concavo-convex sheet of the bat body to which the concavo-convex sheet is transferred. A baseball or softball bat manufacturing method in which a resinous three-dimensional pattern is formed on the hitting ball portion by coating the region with a film-like body.   The baseball or softball bat manufacturing method according to claim 1, wherein the concavo-convex sheet is transferred onto the outer peripheral surface of the hitting ball portion, and the water is transferred to the outer peripheral surface of the hitting ball portion of the bat main body.   Resin is applied to the entire area of the bat body as an area including at least the entire outer surface of the uneven sheet of the bat body to which the uneven sheet is transferred, and the entire area of the bat body is coated with a film-like body. A method for manufacturing a baseball or softball bat according to claim 1 or 2.

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