JP2781729B2 - bat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bat made of metal or fiber reinforced plastic (FRP) used for baseball or softball. The bat provided with.

[0002]

2. Description of the Related Art In a conventional bat, a core material is fitted into a hollow metal bat body having an open front end at a position corresponding to a hitting portion from a front end opening of the bat main body. The side opening was squeezed and closed by head spinning or the like, or the tip side opening of the bat body was fitted and closed with an opaque hard resin stopper (for example, Japanese Utility Model Publication No. 57-16614, 60-7
No. 096).

[0003]

A bat of this type is provided with a core made of cork, resin, or the like at a position corresponding to a hitting portion in the bat body, so that the thickness of the bat is increased. As a result, the strength of the hitting portion can be increased with a small increase in weight, so that the flight distance of the hitting ball can be effectively increased by increasing the restoring force even with a lightweight bat. However, conventionally, since the core material provided at a location corresponding to the hitting portion in the bat main body cannot be distinguished from the outside, the product name or the product name or Unless the product number is compared with the product name or product number of the displayed bat, it is not possible to recognize the shape of the core material inserted into the display bat, and as a result, it takes time to verify the product number, etc. However, since it is not possible to grasp the existence of the core material as a real feeling, it has been a factor that hinders the consumer's willingness to purchase. In addition, it is conceivable to display a sample of the same bat in which the hitting portion of the same bat is cut out and formed near the displayed bat, but in this case, a sample of the type of the displayed bat must be prepared. However, there is an inconvenience that causes a rise in the selling price.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to compare a displayed bat with a product catalog or the like by simply improving a tip portion of a bat body. It is an object of the present invention to make it possible to easily recognize the shape of the core material without preparing each sample, thereby increasing a customer's willingness to purchase.

[0005]

In order to achieve the above object, in the bat according to the first aspect of the present invention, the core material is provided at the tip of a bat body having a core material provided at a position corresponding to a hitting portion. A transparent part that can be seen through from is formed ,
The transparent part (B) is formed in a concave lens shape .

[0006] As described in claim 2 of the present invention, the transparent portion may be formed of a transparent resin plug which closes an opening on the distal end side of the metal bat body.

According to a third aspect of the present invention, the core member is formed in a hollow shape penetrating in the axial direction of the bat, and the base end of the bat body has a transparent portion for lighting. May be formed.

[0008] As described in claim 4 of the present invention, the core material has a shaft portion disposed along the axis of the bat axis, and an outer peripheral surface of the shaft portion substantially extends in the bat axis direction. A plurality of plate-like members extending in a direction orthogonal to each other, and an arc-like plate member pressed against the inner peripheral surface of the bat body connected to each of the distal ends of the plate-like members are integrally formed of resin. May be configured.

[0009]

According to the first aspect of the present invention, a core material is provided at a location corresponding to a hit ball in a bat body, and a flight distance of the hit ball is effectively extended by increasing a restoring force while being a lightweight bat. In addition, since the presence of the core material can be easily visually confirmed through the transparent portion formed at the tip of the bat body, the display bat can be collated in a product catalog or the like as in the related art. Alternatively, it is not necessary to separately prepare a product sample in which a portion corresponding to a hitting portion is cut out. Furthermore, the core material is expanded by the concave lens effect of the transparent part
You can see it.

According to the second aspect of the present invention, the front end opening of the metal bat main body is closed with a resin plug having a different vibration cycle from that of the bat main body, so that the metal bat main body at the time of hitting the ball is hit. The generation of sound can be suppressed, and a transparent portion through which the core material can be seen from the outside can be revealed only by changing the molding resin material of the plug to a transparent resin material.

According to the third aspect of the present invention, the shape of the core material which is fitted inside the bat body at a location corresponding to the hitting portion is clarified by lighting from the transparent portion formed at the base end of the bat body. Can be visually observed.

According to the fourth aspect of the present invention, since the pressure at the time of hitting is transmitted in the radial direction centering on the shaft through the arcuate plate and the plate, the entire core material at the time of hitting is obtained. And the deformation in the thickness direction of the bat body can both be suppressed.

[0013]

According to the first aspect of the present invention,
The shape of the core material fitted in the display bat can be visually confirmed on the spot through a transparent portion formed at the tip of the display bat, and the presence of the core material can be grasped as a real feeling. Therefore, the consumer's willingness to purchase can be increased. Furthermore, visually check the core material through the transparent part
Can be easily performed.

In the case of the second aspect of the present invention, the core material is seen through from the outside by using a resin plug provided for the purpose of suppressing the generation of a metallic sound when hitting a ball. Transparent portion can be advantageously configured in terms of manufacturing cost.

According to the third aspect of the present invention, it is easier to visually check the core material through the transparent portion under the condition that the core material is formed in a hollow shape penetrating in the bat axis direction. It can be carried out.

According to the configuration of the fourth aspect of the present invention, it is possible to increase the flight distance when hitting a ball while suppressing an increase in the weight of the bat.

[0017]

EXAMPLES [First Example] A metal bat shown in FIGS. 1 to 5 is made of polycarbonate having excellent impact resistance at a location A corresponding to a hitting portion in a hollow aluminum alloy bat body 1. A core material 2 (manufactured by Teijin Chemicals Ltd., trade name: Panlite) is fitted therein, and a transparent resin such as polyurethane (for example, trade name Milactran E574) is provided in the opening 1A at the tip end of the bat body 1. The plug 3 formed by the above is fitted and fixed, and the exposed portion 3a of the plug 3 forms a transparent portion B through which the core material 2 can be seen from the outside.

The core 2 is, as shown in FIGS.
A cylindrical shaft portion 2A disposed at a radial center portion along the butt shaft center P, and a plurality of shaft portions 2A extending from the outer peripheral surface of the cylindrical shaft portion 2A in a direction orthogonal to the bat shaft center P. Pieces (6 pieces in this embodiment) of plate-like bodies 2B and the plate-like bodies 2B
And an arc-shaped plate 2C pressed into contact with the inner peripheral surface of the bat main body 1 connected to each of the distal ends of the bat body 1 and integrally formed. A plurality of (six in this embodiment) partition plate members 2D positioned linearly in the diameter direction with each of the body members 2B are integrally formed, and the internal space S of the cylindrical shaft portion 2A is formed as a bat shaft center. It is partitioned and formed into six substantially triangular spaces in cross section penetrating in the P direction. Each of the arc-shaped plate members 2C of the core member 2 is formed in an arc shape such that the center side in the direction of the butt shaft core P protrudes outward in the radial direction, and the two arc-shaped plate members oppose each other in the diametric direction. The maximum outer diameter of the outer surface of the 2C at the center position in the butt axis P direction is slightly larger than the inner diameter of the hitting portion A of the bat body 1 (about 1 mm in this embodiment).
It is formed in dimensions. Further, both ends 2a of the arc-shaped plate 2C in the butt shaft core P direction are formed in a tapered shape such that the tip end side thereof is positioned closer to the butt shaft core P, and oppose each other in the diametric direction. Double arc plate 2C
Is smaller than the inner diameter of the portion from the tip side opening 1A of the bat main body 1 to the location A corresponding to the hitting portion (about 1 mm in this embodiment). It is formed in dimensions. Then, in order to fit the core material 2 at the location A corresponding to the hitting portion in the bat body 1,
First, after inserting the tapered end portion 2a of the core material 2 into the front end side opening 1A of the bat main body 1, it is press-fitted to a predetermined position of a location A corresponding to a hitting portion in the bat main body 1 by a press-fitting machine such as a press machine. The core member 2 is internally fitted and fixed to the bat body 1 in a state where the plate-like body 2B thereof is compressed in a direction along the plate surface.

Before the core material 2 is fitted into the butt body 1 as shown in FIG.
After the core material 2 is press-fitted into the hitting portion A, the core material 2 is press-fitted into the hitting portion 1A and the hitting portion corresponding portion A. The opening 1A is curled so that its thickness is slightly thicker than the thickness of the portion A corresponding to the hitting portion, and further, the plug body is provided on the inner peripheral surface of the thickened distal opening 1A. A fitting groove 1a for fitting with the third annular projection 3b is formed by cutting.

The transparent portion B comprising the exposed portion 3a of the plug 3 is formed in a concave lens shape such that both the inner and outer surfaces in the direction of the butt axis P are partially spherically curved. The distal end face 3c of the fitting portion 3 is formed in a tapered surface such that the distal end side is closer to the butt axis P side, and the plug 3 is connected to the distal end side opening 1 of the bat main body 1.
A cam surface for elastically deforming the fitting cylindrical portion of the plug body 3 inward in the radial direction when fitting to the plug A is formed.
Before fitting the plug 3 into the opening 1A on the distal end of the bat body 1, an adhesive is applied to the inner peripheral surface of the opening 1A on the distal end, so that the adhesive action by the adhesive and the annular projection can be obtained. 3b
The stopper 3 is fitted and fixed to the distal end side opening 1A of the bat main body 1 by the retaining action by the fitting of the plug 3 and the fitting groove 1a. Note that the adhesive is applied to the fitting groove 1a of the distal opening 1A.
Once inside, the fitting margin with the annular projection 3b of the plug 3 becomes shallow, so it is preferable to apply an adhesive to the inner peripheral surface of the distal end side opening 1A excluding the fitting groove 1a.

[Second Embodiment] As shown in FIG. 6, a base end side opening 1 of the bat main body 1 is formed.
The tail plug 4 fitted and fixed to B is molded from a transparent resin such as polyurethane (for example, Miractran E574 (trade name)), and the exposed portion 4a of the tail plug 4 is used for lighting the interior space of the bat body 1. You may comprise and implement the transparent part C. Other configurations are the same as those of the first embodiment.

[Third Embodiment] As shown in FIG.
An annular projection 1b may be formed on the inner peripheral surface of A to engage with an annular groove 3d formed on the outer peripheral surface of the fitting cylindrical portion of the plug body 3. Other configurations are the same as those of the first embodiment.

[Fourth Embodiment] As shown in FIG.
A tip portion 1c of the plug A is curled toward the butt axis P, and an outer peripheral surface of the fitting tube portion of the plug 3 is provided with an annular groove to be fitted with the tip portion 1c of the tip side opening 1A. 3e may be formed and implemented. Other configurations are the same as those of the first embodiment.

[Fifth Embodiment] As shown in FIG.
A tip portion 1c of A is curled toward the butt axis P, and an annular groove 1d is formed in the inner peripheral surface of the tip side opening 1A. On the other hand, the outer peripheral surface of the fitting cylindrical portion of the plug 3 has an annular groove 3e fitted to the distal end portion 1c of the distal opening 1A, and an annular groove 1d of the distal opening 1A.
And an annular projection 3f to be fitted may be formed.

[Other Embodiments] In the first embodiment, the core 2 is made of polycarbonate.
Although it is made of resin, it is limited to this material.
No, for example, metal materials such as aluminum alloys, or
Is ABS resin, polyethylene, polypropylene, poly
You may shape | mold with resin materials, such as urethane and nylon. In the first embodiment described above, the opening on the tip side of the bat body 1
Utilizing the plug 3 for closing the portion 1A,
By molding from fat, the core material 2 can be seen through from the outside
Although the transparent part B is constructed, the tip of the bat body 1 is
Metal squeezed and closed by pad spinning etc.
Even a bat, PressureThe tip of the squeezed closed bat body 1
Through the part in the direction of the butt axis PHoleForm
PerspectivePerforatedAround the opening edge, polycarbonate resin or
Transparent made from transparent resin such as ril resinBodyMating fixation
Then, the core material 2 constitutes a transparent part B which can be seen through from the outside.
Is also good.  The shape of the core 2 has been described in the first embodiment.
It is not limited to the shape, for example, the cross section
Cylindrical or cross-shaped reinforcements are continuously installed on the inner surface of the cylinder
It may be carried out by using one that has been used.  In the first embodiment, the bat body 1 is made of aluminum.
Made from a nickel alloy, but other metals such as duralumin
It can be made from materials, and fiber reinforced plastic
It may be made of a non-metallic material such as (FRP).  In the first embodiment, the bat body 1 and the core material 2
And separately, and equivalent to the ball hitting part in the bat body 1
The core material 2 was internally fitted to the portion A by appropriate means such as press fitting.
The bat body 1 and the core material 2 are integrally molded, and the molded
Unnecessary core 2 part is removed by cutting, etc. when machining
You may leave.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a front view of a metal bat showing a first embodiment.

FIG. 2 is an enlarged cross-section of a plug attaching portion.

FIG. 3 is an enlarged sectional view of a core material attaching portion.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is an enlarged sectional view at the time of press-fitting a core material.

FIG. 6 is an enlarged cross-sectional view of a base end portion of a bat showing a second embodiment.

FIG. 7 is an enlarged cross-sectional view of a plug attaching portion showing a third embodiment.

FIG. 8 is an enlarged cross-sectional view of a plug attaching portion showing a fourth embodiment.

FIG. 9 is an enlarged cross-sectional view of a plug attaching portion according to a fifth embodiment.

[Explanation of symbols]

 A hitting part equivalent part B transparent part C transparent part P bat shaft core 1 bat body 1A tip side opening 2 core material 2A shaft part 2B plate-shaped body 2C arc-shaped plate body 3 plug

Claims (4)

(57) [Claims] 1. A bat comprising a core material (2) provided at a location (A) corresponding to a hitting portion in a hollow bat body (1),
Together when the the distal end of the bat body (1), wherein the core material (2) see-through transparent portion from the outside (B) is formed
And the transparent part (B) is formed in a concave lens shape . 2. The bat according to claim 1, wherein the transparent portion (B) is a plug (3) made of a transparent resin that closes an opening (1A) on the tip side of the metal bat body (1). 3. The bat body (1) has a hollow portion penetrating in the direction of the bat shaft core (P), and a base portion of the bat body (1) has a transparent portion for daylighting. 3. The bat according to claim 1, wherein C) is formed. 4. The core material (2) is arranged along a bat axis direction (P) from a shaft part (2A) and an outer peripheral surface of the shaft part (2A) with respect to the bat axis direction. And a plurality of plate-like members (2B) extending in a direction substantially orthogonal to each other, and pressed against the inner peripheral surface of a bat body (1) connected to each of the distal ends of the plate-like members (2B). arcuate plate member (2C) and the claim 1, 2 or 3 SL is configured by integrally molding a resin
The placement of the bat.