JP7390756B1 - Wooden bat processing equipment and wooden bat processing method - Google Patents

Abstract

[Problem] To facilitate the work of hollowing out the tip of a wooden bat and to improve safety.
[Solution] A wooden bat processing device P includes a rotating part 10 that rotatably supports a grip end GE of a wooden bat WB, rotates the wooden bat WB, and a tip of the wooden bat WB on the opposite side from the grip end GE side. A cutting part 20 that cuts the part with the output of a linear motion of a cutting tool 25, and a support part 30 that is disposed between the rotating part 10 and the cutting part 20 and rotatably supports the wooden bat WB, The wooden bat WB is horizontally supported between the rotating part 10 and the cutting part 20 by the rotating part 10 and the supporting part 30, and the cutting tool 25 of the cutting part 20 is horizontally supported while the wooden bat WB is being rotated by the rotating part 10. The tip of the wooden bat WB is hollowed out and cut by linear motion.
[Selection diagram] Figure 2

Description

The present invention provides a wooden bat processing device and a method for processing a wooden bat for hollowing out the tip of a wooden bat, and particularly aims to facilitate the process of hollowing out the tip of a wooden bat and improve safety. The present invention relates to a wooden bat processing device and a method for processing a wooden bat.

As shown in Patent Document 1, as a method to make the weight of a wooden baseball bat feel lighter and improve swinging technique, the tip of the wooden bat is hollowed out to reduce its weight and the center of gravity is moved toward the grip side (hand side). It is known to send.
Conventionally, when cutting out the tip of a wooden bat, the length of the bat is oriented vertically so that the head side of the bat is on top. This was done using a drilling machine that performs cutting using the rotational and linear motion of a drill on a vertical line.

Publication No. 52-098563

However, when the wooden bat is oriented vertically and cutting is performed using the rotary and linear motion output of the drill on a vertical line in the length direction of the wooden bat, the vertical load applied to the wooden bat makes it difficult to adjust the load and speed. As a result, there were problems in that when operating the drill, too much load was applied, resulting in cutting too deep or misalignment, and precise machining required extreme skill. Furthermore, since the wooden bat is easily loaded and the drill is rotated to perform cutting, even experienced workers must be very careful in terms of safety during machining operations. But there was.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a wooden bat processing apparatus and a method for processing a wooden bat, which can facilitate the work of hollowing out the tip of a wooden bat and improve safety.

The wooden bat processing device of the invention according to claim 1 includes a rotating part that rotatably supports a grip end of a wooden bat, and a cutting part that cuts a tip part of the wooden bat on the opposite side from the grip end side. The wooden bat is supported horizontally by the rotating part and the supporting part, and the tip of the wooden bat is cut by the output of the horizontal linear motion of the cutting tool of the cutting part while the wooden bat is rotated by the rotating part. It is hollowed out and cut.

The rotating part is composed of a chuck that grips the grip end of a wooden bat that is turned sideways, a rotating main shaft that provides rotational movement, etc. The rotating part grips the wooden bat by gripping the grip end of the wooden bat with the chuck and fixing it to the rotating main shaft. The end is rotatably supported, and rotational movement is imparted to the horizontal wooden bat via the rotating main shaft and chuck.

The cutting part is installed opposite to the rotating part, and is rotated by the output of horizontal linear motion of the cutting tool by pressing the cutting tool against the tip of the head side of the wooden bat that is turned sideways. This is for hollowing out the tip of the head side of a wooden bat. The above-mentioned cutting tool may be any tool that can hollow out the tip of a wooden bat into a bowl shape. For example, a so-called countersink or countersunk cutting tool may be used, or a hole core or a bottom scraper may be used. A Forstner bit type tool for blind hole machining, which is equipped with a blade and a peripheral notch blade, may also be used.

The support part is disposed between the rotating part and the cutting part, and rotatably supports the wooden bat. It can be supported with less friction.

The cutting tool of the cutting part of the wooden bat processing device according to the invention of claim 1 has a hole core provided at the tip of the shaft center, and a diameter that is formed symmetrically with respect to the shaft center and cuts the bottom side of the hole. a pair of bottom wiper blades in the direction, and a pair of outer peripheral notch blades in the circumferential direction, which are arranged symmetrically with respect to the axis at a predetermined interval and cut the outer peripheral surface side of the hole. It is something that you have.
Here, the punching core is sharp enough to be inserted into the center of the tip of the wooden bat for positioning.
Further, the bottom wiper blade portion cuts a portion corresponding to the bottom side of a hole to be hollowed out in a bowl shape, and has a straight blade.
Further, the outer circumferential notch blade portion cuts a portion corresponding to the peripheral surface side of a hole to be hollowed out in a bowl shape, and has a curved blade. The curved blade may be flat, or may have an uneven shape such as a wave shape, tooth shape, or jagged shape.
In the wooden bat processing device according to the invention of claim 1 , each of the front outer peripheral notch blades of the cutting tool is reduced in the radial direction toward the drilling core side, that is, the diameter is reduced.

The wooden bat processing device of the invention according to claim 2 includes a rotating part that rotatably supports the grip end of the wooden bat and rotates the wooden bat, and a rotating part on the head side of the wooden bat opposite to the grip end side. a cutting part that cuts the tip part by a horizontal linear motion of a cutting tool; a support part that is disposed between the rotating part and the cutting part and rotatably supports the wooden bat; A bat is horizontally supported by the rotating part and the supporting part between the rotating part and the cutting part, and when the wooden bat is rotated by the rotating part, the horizontal straight line of the cutting tool in the cutting part is Through the movement, the tip of the wooden bat on the head side is cut into a concave shape with a curved inner surface in a longitudinal section to a depth of 3.2 cm or less and a diameter of 2.54 to 5.1 cm .

The cutting tool of the cutting section of the wooden bat processing apparatus according to the third aspect of the present invention has a shape whose diameter is reduced toward the tip.

The support section of the wooden bat processing apparatus according to the invention of claim 4 supports the wooden bat by sandwiching it between a plurality of rotatable rollers.

The method for processing a wooden bat according to the invention of claim 5 is such that, while the wooden bat is horizontally supported and rotated , the inner surface of the head-side tip of the wooden bat is cut in a longitudinal section by a horizontal linear movement of a cutting tool. It cuts in a curved concave shape with a depth of 3.2 cm or less and a diameter of 2.54 to 5.1 cm .

The method for processing a wooden bat according to the invention of claim 6 is such that, while the wooden bat is horizontally supported and rotated, the inner surface of the head-side tip of the wooden bat is cut in a longitudinal section by horizontal linear movement of a cutting tool. Cutting a curved concave shape with a depth of 3.2 cm or less and a diameter of 2.54 to 5.1 cm, and polishing the grip of the wooden bat with an abrasive while the wooden bat is supported horizontally and rotated. It is something to do.
Polishing (grinding) the grip of the wooden bat is performed, for example, by pressing an abrasive material such as sandpaper against the grip.

According to the wooden bat processing device of the invention of claim 1, the rotating part rotatably supports the grip end of the wooden bat and rotates the wooden bat, and the tip of the wooden bat on the opposite side from the grip end side. a cutting part that cuts the part with the output of a horizontal linear motion of a cutting tool; a support part that is disposed between the rotating part and the cutting part and rotatably supports the wooden bat; A wooden bat is horizontally supported by the rotating part and the supporting part between the rotating part and the cutting part, and the cutting tool of the cutting part is in a horizontal straight line when the wooden bat is rotated by the rotating part. The output of the movement hollows out and cuts the tip of the wooden bat.

Therefore, between the rotating part and the cutting part, the wooden bat is supported horizontally (sideways) by the rotating part and the supporting part, and while the wooden bat is rotated by the rotating part, the output of the horizontal linear motion of the cutting tool is used to cut the wooden bat. Since the tip of the bat is hollowed out and cut in the horizontal direction, unlike vertical drilling machines that cut in the vertical direction, it is difficult to apply vertical or excessive loads to the wooden bat during the cutting operation. , the load can be easily adjusted, cutting too deeply and positional deviations are unlikely to occur, and precise hollow cutting can be easily performed without requiring skill. In addition, it is difficult to apply an excessive load to the wooden bat, and instead of rotating the cutting tool to hollow out the tip of the bat, the rotating part rotates the wooden bat and the linear movement of the cutting tool cuts the tip of the wooden bat. Since the part is hollowed out and cut, the safety of the cutting work is also improved.
Therefore, according to the wooden bat processing apparatus of the first aspect of the invention, it is possible to facilitate the hollowing out operation of the tip of the wooden bat and to improve safety.

Furthermore, according to the wooden bat processing apparatus of the invention of claim 1, while rotating the wooden bat horizontally supported by the rotating part, the cutting tool is linearly moved in the horizontal direction to hollow out and cut the tip of the wooden bat. Since the wooden bat is rotated, it is also possible to polish (grind) the grip side of the wooden bat by applying an abrasive to the outside surface of the grip side of the wooden bat. In particular, since the grip is polished and made thinner while rotating the wooden bat, precise polishing is possible and the finishing accuracy can be improved.

According to the wooden bat processing device of the invention of claim 1 , the drilling core provided at the tip of the shaft center, and a pair of radial bottom surface wipers formed symmetrically with respect to the shaft center and cutting the bottom side of the hole. It has a blade part and a pair of circumferential notch blade parts that are arranged symmetrically with respect to the axis at a predetermined interval and cut the outer peripheral surface side of the hole. Easily locates the center of cutting a wooden bat. Therefore, it is possible to select the type of wood and to easily perform precise boring (blind hole machining) in which the position of the hole is not easily misaligned or blurred. Therefore, the finishing accuracy of hollow cutting can be improved. In addition, a pair of radial bottom wiper blades are formed symmetrically with respect to the axis and cut the bottom side of the hole, and a pair of bottom wiper blades are arranged symmetrically with respect to the axis at a predetermined interval from each other and cut the bottom side of the hole. When used in combination with a pair of circumferential notch blades that cut the hole, it improves the discharge of cutting waste and enables a wider (larger diameter) bowl-shaped cut at the bottom of the hole. do.
According to the wooden bat processing device of the invention of claim 1 , each of the outer circumferential notch blade portions of the cutting tool of the cutting section is radially reduced (diameter reduced) toward the drilling core side. Therefore, it is possible to easily cut out a hole having a curved bottom , that is, a bowl shape.

According to the wooden bat processing device of the invention of claim 2 , the rotating part rotatably supports the grip end of the wooden bat and rotates the wooden bat, and the tip of the wooden bat on the opposite side from the grip end side. a cutting part that cuts the part with the output of a horizontal linear motion of a cutting tool; a support part that is disposed between the rotating part and the cutting part and rotatably supports the wooden bat; A wooden bat is horizontally supported by the rotating part and the supporting part between the rotating part and the cutting part, and the cutting tool of the cutting part is in a horizontal straight line when the wooden bat is rotated by the rotating part. By the output of the movement, the tip of the wooden bat is cut into a concave shape with a curved inner surface in a longitudinal section to a depth of 3.2 cm or less and a diameter of 2.54 to 5.1 cm .
Therefore, between the rotating part and the cutting part, the wooden bat is supported horizontally (sideways) by the rotating part and the supporting part, and while the wooden bat is rotated by the rotating part, the output of the horizontal linear motion of the cutting tool is used to cut the wooden bat. Since the tip of the bat is hollowed out and cut in the horizontal direction, unlike vertical drilling machines that cut in the vertical direction, it is difficult to apply vertical or excessive loads to the wooden bat during the cutting operation. , the load can be easily adjusted, cutting too deeply and positional deviations are unlikely to occur, and precise hollow cutting can be easily performed without requiring skill. In addition, it is difficult to apply an excessive load to the wooden bat, and instead of rotating the cutting tool to hollow out the tip of the bat, the rotating part rotates the wooden bat and the linear movement of the cutting tool cuts the tip of the wooden bat. Since the part is hollowed out and cut, the safety of the cutting work is also improved.
Therefore, according to the wooden bat processing apparatus of the second aspect of the invention , it is possible to facilitate the hollowing out operation of the tip of the wooden bat and to improve safety.
Furthermore, according to the wooden bat processing apparatus of the invention of claim 2 , while rotating the wooden bat that is horizontally supported by the rotating part, the cutting tool is linearly moved in the horizontal direction to hollow out and cut the tip of the wooden bat. Since the wooden bat is rotated, it is also possible to polish (grind) the grip side of the wooden bat by applying an abrasive to the outside surface of the grip side of the wooden bat. In particular, since the grip is polished and made thinner while rotating the wooden bat, precise polishing is possible and the finishing accuracy can be improved.

According to the wooden bat processing device of the invention of claim 3 , since the cutting tool of the cutting section has a shape whose diameter is reduced toward the tip, in addition to the effect described in claim 1 or claim 2 , It is easy to hollow out a bowl shape.

According to the wooden bat processing apparatus of the invention of claim 4 , the support section supports the wooden bat by sandwiching it between a plurality of freely rotatable rotating rollers, so that the wooden bat is not subjected to a load that may damage the wooden bat. The wooden bat can be supported more stably, and the wooden bat is less likely to be bent even when the wooden bat is cut in the horizontal direction. Therefore, in addition to the effects described in claim 1 or 2 , positional deviation during hollow cutting is less likely to occur, and more precise hollow cutting can be easily performed.

According to the wooden bat processing method of the invention of claim 5 , the wooden bat is horizontally supported and rotated, and the head-side tip of the wooden bat is cut by the output of a horizontal linear motion of a cutting tool. .
Therefore, while the wooden bat is supported horizontally (sideways) and the wooden bat is rotated, the tip of the wooden bat is hollowed out and cut in the horizontal direction by the output of the horizontal linear motion of the cutting tool. Unlike vertical drilling machines that cut in the vertical direction, it is difficult to apply vertical or excessive loads to the wooden bat during cutting operations, making it easier to adjust the load and avoid cutting too deep or misaligning. It is difficult to form a hole, and it is possible to easily perform precise hollow cutting without requiring any skill. In addition, it is difficult to apply an excessive load to the wooden bat, and instead of rotating the cutting tool to hollow out the tip of the bat, the rotating part rotates the wooden bat and the linear movement of the cutting tool cuts the tip of the wooden bat. Since the part is hollowed out and cut, the safety of the cutting work is also improved.
Therefore, according to the wooden bat processing method of the invention of claim 5 , it is possible to facilitate the hollowing out operation of the tip of the wooden bat and to improve safety.

Furthermore, according to the wooden bat processing method of the invention of claim 5 , the cutting tool is linearly moved in the horizontal direction while rotating the horizontally supported wooden bat to hollow out and cut the tip of the wooden bat. Since the wooden bat is rotated, it is also possible to polish (grind) the grip side of the wooden bat by applying an abrasive to the outer surface of the grip side of the wooden bat. In particular, since the grip is polished and made thinner while rotating the wooden bat, precise polishing is possible and the finishing accuracy can be improved.

According to the method for processing a wooden bat of the invention as claimed in claim 6 , since the grip of the wooden bat is polished while the wooden bat is supported horizontally and rotated , precise polishing is possible and finishing accuracy is improved. can be made higher.

FIG. 1 is an explanatory diagram showing the overall configuration of a bat processing apparatus according to an embodiment of the present invention. FIG. 2 is an overall explanatory diagram illustrating a state in which the tip of a wooden bat is cut by the bat processing apparatus according to the embodiment of the present invention. FIG. 3 is a perspective view of a main part illustrating a state in which the tip of a wooden bat is cut by the bat processing apparatus according to the embodiment of the present invention. FIG. 4 is an enlarged perspective view showing the configuration of the cutting section of the butt processing device according to the embodiment of the present invention. FIG. 5(a) is a front view of the cutting tool in the cutting section of the butt processing device according to the embodiment of the present invention, and FIG. 5(b) is a front view of the cutting tool in the cutting section of the butt processing device according to the embodiment of the present invention. FIG. FIG. 6(a) is a side view illustrating the state before cutting the tip of a wooden bat with a cutting tool in the cutting section of the bat processing apparatus according to the embodiment of the present invention, and FIG. 6(b) is FIG. 6C is a perspective view illustrating a state before cutting the tip of a wooden bat with a cutting tool in the cutting section of the bat processing device according to the embodiment of the present invention; FIG. Fig. 6(d) is a side view illustrating a state in which the tip of a wooden bat is being cut with a cutting tool in the cutting section of the bat processing device according to the embodiment of the present invention; FIG. 3 is a perspective view illustrating a state in which the tip of a wooden bat is being cut with a cutting tool in FIG. FIG. 7(a) is a perspective view illustrating a state in which a wooden bat is supported by the support portion of the bat processing device according to the embodiment of the present invention, and FIG. FIG. 7A is a perspective view seen from the opposite side of FIG. 7A, illustrating a state in which a wooden bat is supported by the support portion of the processing device. FIG. 8(a) is a front view of the tip of a wooden bat that has been hollowed out and cut using the bat processing apparatus according to the embodiment of the present invention. FIG. 8C is a perspective view of the tip of the wooden bat that has been hollowed out, and FIG. 8(c) is a sectional view of the tip of the wooden bat that has been hollowed out and cut by the bat processing apparatus according to the embodiment of the present invention. FIG. 9 is an explanatory view of polishing the grip of a wooden bat using the bat processing apparatus according to the embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
Note that in the embodiments, the same symbols and numerals shown in the drawings represent the same or corresponding functional parts, and therefore, redundant detailed explanations will be omitted here.

[Embodiment]
First, the configuration of a bat processing apparatus P according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.
As shown in FIGS. 1 and 2, the bat processing device P according to the embodiment of the present invention rotatably supports the grip G side of the wooden bat WB, and outputs a rotational movement to rotate the wooden bat WB. a cutting section 20 that cuts the tip of the wooden bat WB on the head H side opposite to the grip G side using the linear motion output of the cutting tool 25; It has a support part 30 that is disposed between the two and horizontally supports the head H side of the wooden bat WB in a rotatable manner.

Furthermore, the bat processing apparatus P of this embodiment includes a bed 40 that supports the rotating section 10, the cutting section 20, and the supporting section 30 at a predetermined height.
That is, the bed 40 includes legs 41 that raise the bed surface 42a to a predetermined height, and includes a headstock 11 that constitutes the rotating section 10 and a tailstock that constitutes the cutting section 20 that are placed on the bed surface 42a. 21 and the mounting fixture 32 constituting the support portion 30, and has a rigidity capable of withstanding the cutting resistance and vibrations generated when cutting the wooden bat WB. In particular, the bed surface (guide surface) 42a, which is finished by scraping or grinding after planing and is provided with grooves 42b, allows the tailstock 21 constituting the cutting section 20 to move back and forth horizontally. Installation. That is, the bed surface 42a provided with the groove 42b on the upper surface of the bed 40 is provided with a wooden bat WB that is installed concentrically with the rotational main shaft 12 of the rotating section 10 provided parallel to the bed surface 42a of the bed 40 and synchronized with the rotation thereof. The tailstock 21 of the cutting section 20 is allowed to feed in the axial direction.

In the present embodiment, the rotating part 10 provided at one end in the length direction of the bed 40 has a headstock 11 fixed to the top surface of the bed 40 by welding or bolts and nuts, and On the other hand, a rotating main shaft 12 is attached parallel to the bed surface 42a of the bed 40 and rotates the wooden bat WB, a chuck 13 is attached to the tip of the rotating main shaft 12 and fixes the wooden bat WB to the rotating main shaft 12, and a rotating main shaft 12 It is composed of a motor 14 for rotationally driving the motor 14, a belt (not shown) for transmitting the power of the motor 14 to the rotating main shaft 12, a gear (not shown) for converting the rotation speed of the rotating main shaft 12, etc. . Note that it is preferable to use a transmission (not shown) that can change the rotation speed of the rotating main shaft 12, and the rotation speed of the motor 14 (for example, 1400 rpm to 2000 rpm, preferably 1700 to 2000 rpm) is usually changed by Although a ratio series is adopted, a continuously variable speed type may be used.

In the rotating section 10 of this embodiment, the rotating main shaft 12 is attached to the headstock 11 in parallel to the bed surface 42a, that is, with its axial direction being horizontal (lateral). Then, the wooden bat WB is attached to the rotational spindle 12 in a horizontal direction (sideways) via the chuck 13 fixed to the rotational spindle 12 extending sideways from the headstock 11, thereby synchronizing with the rotation of the rotational spindle 12. to rotate the wooden bat WB around its axis.

As the chuck 13 for fixing the grip end GE of the wooden bat WB to the rotating main shaft 12, for example, if the grip end GE is of a flare type, a scroll chuck or the like can be used. Tighten and secure. As the scroll chuck, for example, commercially available NOVA SELECT midi chuck, NOVA G3 LITE chuck, NOVA super NOVA2 LITE chuck, etc. can be used. In the figure, for example, a four-jaw scroll chuck with a diameter of 8 mm to 100 mm is shown with jaws made of nylon or the like (for example, NOVA soft jaw set) attached.

By using such a scroll chuck, less pressure is applied to one point, so the pressure is dispersed and the grip end GE of the wooden bat WB can be fixed without damaging the entire grip end GE. However, when carrying out the present invention, it is not limited to such a scroll chuck, and for example, a collect chuck, an independent chuck, a magnetic type, etc. can also be used, and grip end GE major type, flare type, etc. , N tie cup type, round type, tie cup type, standard type, etc. can be selected depending on the shape. In any case, it is sufficient that the end grip GE of the wooden bat WB can be clamped and restrained, and that the wooden bat WB can be attached concentrically to the axis of the rotational main shaft 12 of the rotating part 10.

In the present embodiment, the cutting section 20 provided on the bed 40 at the other end opposite to the rotating section 10 moves horizontally back and forth (horizontally) along the longitudinal direction of the bed surface 42a of the bed 40. The tailstock 21 is freely installed on the bed 40 (sliding), the tailstock shaft 22 is attached to the tailstock 21 in parallel to the bed surface 42a of the bed 40, and the tailstock 22 extends sideways from the tailstock 21. The cutting tool 25 is attached to the tip of the tailstock shaft 22 and cuts the tip of the wooden bat WB on the head H side.

The tailstock 21 is installed facing the headstock 11 of the rotating part 10, is horizontally movable on the bed surface 42a on the bed 40, and can be moved to any position on the bed 40 according to the length of the wooden bat WB. Set. Note that the tailstock 21 may be able to move back and forth on the bed surface 42a by manual operation, or may be moved by automatic operation using a motor drive of the rotating part 10 or the like. . The tailstock 21 also serves to press a cutting tool 25 attached to the tailstock shaft 22 against the head H side tip of the wooden bat WB when hollowing out the head H side tip of the wooden bat WB. supports the tip of the wooden bat WB on the head H side.

In the cutting section 20 of the present embodiment, the tailstock shaft 22 is attached to the tailstock 21 parallel to the bed surface 42a, that is, with its axial direction horizontal (sideways), and the tailstock The cutting tool 25 attached to the tip of the tailstock shaft 22 protruding sideways from the stand 21 is pressed against the tip of the head H side of the wooden bat WB which is arranged sideways and rotating. By linearly moving (moving forward), the tip of the wooden bat WB on the head H side is hollowed out and cut.
In this embodiment, the tailstock shaft 22 to which the cutting tool 25 is attached can be taken in and out by rotating a handle 24 provided on the side opposite to the cutting tool 25 side. . Therefore, the cutting tool 25 is set on the head H side of the wooden bat WB in accordance with the length of the wooden bat WB held horizontally (sideways) by being clamped between the chuck 13 of the rotating part 10 and the paddle A of the supporting part 30 (described later). After sliding the tailstock 21 on the bed 40 so as to approach the tip of the bat, the tip of the head H side of the wooden bat WB is moved by linear movement of the tailstock shaft 22 in the horizontal direction by rotating the handle 24. It is possible to easily make fine adjustments in pressing the cutting tool 25 against the parts.

In this embodiment, a cutting tool 25 made of metal (for example, stainless steel, steel, carbon steel, etc.) is attached to the tip of the tailstock shaft 22 that projects sideways from the tailstock 21. As shown in 6 etc., a handle 25A is inserted and held in the chuck 23 and attached to the tailstock shaft 22 with the axes concentric, and a drilling core 25a and a blade are formed at the tip of the handle 25A. The cutting head 25B is composed of a sharp drilling core 25a provided at the tip in the axial direction of the handle 25A, and a cutting head 25B having a substantially semi-elliptical plate. A pair of bottom wiper blades 25b line-symmetrical to the axis (imaginary axis) of the cutting head 25B divided into two with the axial direction in between, and one side of each plate-shaped bottom wiper blade 25b. It has a pair (two pieces) of substantially curved outer circumferential notch blade portions 25c which are arranged in the shape of a substantially curved surface and have two opposing portions cut out of the quarters of the substantially ellipsoid.

Since the drilling core 25a of the cutting head 25B of the cutting tool 25 has a sharp tip, it can be precisely positioned to the axis of the wooden bat WB with respect to the tip on the head H side of the wooden bat WB. It is something. That is, by inserting the drilling core 25a of the cutting tool 25 into the axis of the wooden bat WB and positioning (drilling) it without wobbling, the blade parts 25b, 25c of the cutting tool 25 are inserted at the tip of the rotating wooden bat WB. It is difficult for the center of the cutting axis to shift due to the linear motion of the tool, and the hollowing position is difficult to shift from the center of the axis, making it possible to improve the accuracy of hollowing.

Each bottom wiper blade part 25b has a straight blade on the front side (tip side) on the side of the drilling core 25a, and has a plate shape in the shape of an ellipse cut into quarters (approximately fan shape), and has a plate shape on the side of the drilling core 25a. On the front side (tip side), it protrudes slightly forward (toward the drilling core 25a side) from the outer circumferential notch blade part 25c, so that it becomes the bottom surface of the hole when hollowing out the tip of the wooden bat WB. It is used to sharpen the surface.

Moreover, each outer peripheral notch blade part 25c has a curved (curved surface) blade in the shape of a substantially ellipsoid cut into quarters, and the diameter gradually decreases from the handle part 22A side to the tip on the drilling core 25a side. The cross section perpendicular to the axial direction is approximately fan-shaped. The outer peripheral notch blade part 25c is located slightly behind the bottom wiper blade part 25b on the front side (tip surface side) of the punching core 25a, so that it can be used as a hole when hollowing out the tip of the wooden bat WB. This involves cutting the surface that will become the surrounding surface.

In addition, the interval between the pair of outer peripheral notch blade parts 25c is approximately V-shaped or approximately forming an angle within the range of approximately 40° to 135°, preferably approximately 60° to 120° when viewed from the front. A roughly L-shaped chip space s is formed to improve the discharge of cutting waste. Although not shown, the curved surface on the front side (tip side) of each outer circumferential notch blade part 25c is designed to prevent the pressing force from being applied too strongly, that is, to reduce resistance and cut efficiently (cutting amount A depression (concave part) is formed to increase the Note that the opposite back side is flat.
Further, the entire cutting head 25B has a parabolic shape (a shape obtained by cutting an ellipse in half) in a longitudinal section parallel to the axial direction. Further, the outer diameter of the cutting head 25B is smaller than the outer diameter of the tip of the wooden bat WB, and is within the range of 26 mm to 50 mm.

The bottom wiper blade part 25b has a straight blade in the radial direction, and the curved blade part 25b in the circumferential direction is formed by cutting off two opposing parts of the quartered ellipsoid, gradually moving toward the tip. According to the cutting tool 25 having a pair of outer circumferential notch blades 25c in the shape of a curved body whose diameter is reduced (narrowed), the cutting waste can be easily discharged, and the tip of the wooden bat WB can be shaped like a bowl. Can be easily hollowed out. That is, due to the arrangement of the pair of outer peripheral notch blades 25c that form a chip pocket s that is approximately V-shaped or approximately L-shaped when viewed from the front, chips when hollowing out the bat WB are removed from the outer peripheral notch blades. The chips are discharged from between the portions 25c, making it difficult for the chips to accumulate in the hole, and making it possible to easily hollow out a bowl shape by avoiding problems such as the chips biting into the cutter.
In particular, when hollowing out vertically with the wooden bat WB oriented vertically, chips tend to fall and accumulate under the hole, causing problems such as cutting into the cutter. When hollowing is performed in the horizontal direction with the tool facing sideways, cutting in the horizontal direction can be easily performed since chips are easily discharged to the outside and are less likely to cause problems such as cutting into the cutter.
Furthermore, such a cutting tool 25 is less likely to be bent than a cutting tool used for boring or drilling.
Therefore, it is possible to perform hole drilling (hollow cutting) with high precision without being easily misaligned with respect to the central axis of the wooden bat WB, without requiring skilled techniques to change the processing speed etc., even by non-experts.
In addition, the working environment can be improved by installing a dust collector (not shown) around the cutting part 20 of the bat processing device P to collect wood chips generated by cutting the wooden bat WB.

That is, the cutting tool 25 of the cutting part 20 of the present embodiment has a sharp drilling core 25a provided at the tip of the shaft center, and a hole 100 formed symmetrically with respect to the shaft center by cutting the bottom side of the hole 100. A pair of bottom wiper blades 25b in the radial direction are arranged symmetrically with respect to the axis at predetermined intervals mutually forming a substantially V-shape or substantially L-shape, and cut the peripheral surface side of the bowl-shaped hole 100. Since it has a pair of outer peripheral notch blades 25c extending in the circumferential direction, it is easy to precisely position the center of cutting the wooden bat WB using the sharp drilling core 25a. Therefore, it is possible to select the type of wood and to perform precise drilling (blind hole processing) that is difficult to cause misalignment or vibration during drilling, and it is possible to improve the finishing accuracy of the hollow cutting process. In particular, by providing a predetermined space (chip pocket) s having a substantially V-shape or a substantially L-shape between the pair of outer circumferential notch blade portions 25c, the discharge of cutting waste can be improved. Additionally, a pair of radial bottom wiper blades 25b are formed symmetrically with respect to the axis and cut the bottom side of the bowl-shaped hole 100, and a predetermined space (chip In combination with a pair of outer peripheral notch blades 25c in the circumferential direction that are arranged symmetrically with respect to the axis at a predetermined interval and cut the peripheral surface side of the bowl-shaped hole 100 to form a pocket) s. If there is, the bottom of the hole 100 can be cut into a bowl shape with a wider width (larger diameter). In addition, the cutting guidance is likely to be accurate, and excessive force is not easily applied to the hollowed-out portion of the cutting, so that the hole is less likely to be damaged and the cutting position is less likely to shift. Therefore, it is possible to improve finishing accuracy.

Furthermore, in this embodiment, the support section 30 disposed between the rotating section 10 and the cutting section 20 is fixed at a predetermined position on the bed surface (guide surface) 42a of the bed 40, and the supporting section 30 is arranged between the rotating section 10 and the cutting section 20. By rotatably supporting the wooden bat WB placed horizontally (sideways) between them, the rotation of the wooden bat WB, which rotates in synchronization with the main shaft 12 of the rotating part 10, is stabilized, and the deflection of the wooden bat WB is stabilized. To prevent this, it is possible to perform hollow cutting (drilling) processing in which center misalignment is unlikely to occur.

The support section 30 of this embodiment includes a clamp section 31 consisting of three rollers 31A for rotatably supporting the wooden bat WB and an arm section 31B rotatably supporting each roller 31A; and a mounting and fixing part 32 that is mounted and fixed to the bed surface 42a of the bed 40.
Each roller 31A is a rotary body made of resin with a built-in ball bearing, and rubber or the like is disposed around it, and its axial center is pivotally supported by the arm portion 31B. The arm portion 31B is of a clamping type using a lever principle (scissor type), and has a plurality of holes formed therein so that the distance between the rollers 31A supported by the shaft can be freely adjusted.
That is, the clamp part 31 is inserted into a plurality of holes in which the interval between the rollers 31A can be freely adjusted so that the wooden bat WB can be sandwiched between the three rollers 31A according to the dimensions of the wooden bat WB. Contains bolts, nuts, etc.

The mounting and fixing part 32 for mounting and fixing the arm part 31B, which rotatably supports three rollers 31A, on the bed 40 is formed (assembled) into a substantially L-shape by a pole part 32A and a base part 32B, and the arm part The arm part 31B is attached by inserting the ring 31a provided in the pole 32 into the pole 32 and tightening and fixing it with fasteners such as bolts and nuts. By aligning the grooves provided in the roller 32B at predetermined positions and fixing the base portion 32B on the bed surface 42a by screwing and fixing fixing tools such as bolts and block-shaped nuts, the roller 31A and the arm portion that pivotally supports it are fixed. A clamp part 31 consisting of 31B is attached and fixed to the bed 40. Note that the attachment position of the ring 31a of the arm portion 31B to the pole portion 32, that is, the attachment height of the clamp portion 31, can be freely adjusted using fasteners such as bolts and nuts.

In this way, in the support section 30 of the present embodiment, the wooden bat WB can be held between the plurality of rotatable rollers 31A by the clamp section 31 having a plurality of rollers 31A rotatably supported by the arm section 31B. This rotatably supports the horizontally arranged wooden bat WB.
That is, the head of the wooden bat WB is held between the plurality of rotatable rollers 31A of the support section 30, which includes the clamp section 31 which is fixedly attached to the bed 40 and has a plurality of rollers 31A rotatably supported by the arm section 31B. By holding the H side horizontally so that it can rotate freely, even when cutting force is applied to the wooden bat WB in the horizontal direction, it prevents the wooden bat WB from bending and supports the wooden bat WB stably without rattling. can do. As a result, the rotation of the wooden bat WB is stabilized, the workability of cutting is improved, and precise hollowing cutting that is unlikely to cause positional deviation during cutting can be easily performed.

As shown in FIGS. 1 and 2, a switch 15 for instructing the rotation of the main rotation shaft 12 of the rotating section 10 is arranged on the center side of the bed 40, and as the switch 15 is turned on and off, the rotating section 10 is turned on and off. A rotating main shaft 12 horizontally protruding from the headstock 11 and a chuck 13 fixed to the tip of the rotating main shaft 12 are rotated. Note that the rotation direction is usually rotation in one specified direction.

Next, the operation of processing the wooden bat WB using the bat processing apparatus P configured in this manner will be described.
The wooden bat WB is for hardball baseball, and the maximum diameter on the H side of the head is less than 6.7cm, the length is 106.7cm or less, and the weight is about 800 to 900g. It can be applied regardless of the type of bat WB. Further, the wooden bat WB is made of, for example, maple wood, birch wood, ash wood, beech wood (beech wood), orchid wood.

When processing the wooden bat WB, the wooden bat WB is set approximately horizontally (sideways) between the rotating section 10 and the cutting section 20 of the bat processing device P.
Specifically, as shown in FIGS. 2 and 3, the grip end GE at one end of the wooden bat WB is tightened and fixed by the chuck 13 fixed to the rotation main shaft 12 of the rotation section 10, and the rotation section 10 and By sandwiching the wooden bat WB between a plurality of rollers 31A of the support section 30 between the cutting section 20 and the cutting section 20, the wooden bat WB is held substantially horizontally between the rotating section 10 of the bat processing device P and the cutting section 20. At this time, the wooden bat WB is arranged so that its axial center (center axis) substantially coincides with the 12 axial centers of the rotating main shaft, that is, 12 concentrically on the rotating main shaft.

Note that, depending on the length of the wooden bat WB, the support part 30 is fixed with bolts, block-shaped nuts, etc. on the head H side of the wooden bat WB at a position where the wooden bat WB can be held horizontally without wobbling. It is fixed to the bed surface 42a of the bed 40 with a tool.
In addition, in the present embodiment, the support section 30 disposed between the rotating section 10 and the cutting section 20 has a distance between the rollers 31A that are pivotally supported by the arm 31B, that is, the arm 31B allows the roller A31 to be By having a configuration in which the supported position can be adjusted freely with bolts and nuts, the distance between the three rollers 31A is increased so that the circle of the cross section of the wooden bat WB is in approximately the same direction as the circle of the three rollers 31A. After inserting the wooden bat WB between the rollers 31A so that Grip (pinches) horizontally.

Then, while the wooden bat WB is held substantially horizontally between the chuck 13 of the rotating section 10 and the plurality of rollers 31A of the supporting section 30, the end surface of the wooden bat WB on the head H side and its axis are The cutting tool 25 of the cutting section 20 is pressed to the position where the hole core 25a is inserted.
In this embodiment, the tailstock 21 of the cutting part 20 is slid and moved on the bed surface 42a of the bed 40 to set it at a predetermined position according to the length of the wooden bat WB, and the handle 24 By adjusting the amount of protrusion of the cutting tool 25 from the tailstock shaft 22 through the operation, cutting is performed to a position where the drilling core 25a of the cutting tool 25 of the cutting section 20 can be inserted into the end surface of the head H side of the wooden bat WB. Adjust the position of the tool 25. In particular, in this embodiment, by providing the drilling core 25a at the tip of the central axis (virtual axis) of the cutting tool 25, precise positioning to the axis of the wooden bat WB is facilitated, and axis misalignment is prevented. This makes it possible to form a bowl-shaped hole 100, which improves processing accuracy.

Furthermore, by turning on the power switch 15 to drive the rotating part 10 while holding the wooden bat WB substantially horizontally between the rotating part 10 and the cutting part 20 of the bat processing device P, the wooden bat WB is Rotate. Then, while the wooden bat WB is rotating, the cutting tool 25 with the drilling core 25a pressed against the end face of the tip on the head H side of the wooden bat WB is moved horizontally toward the rotating part 10 side by operating the handle 24. By linearly moving (feeding) the rotating wooden bat WB, the tip of the rotating wooden bat WB on the head H side is hollowed out by the cutting tool 25 to form a concave hole.

That is, with the drilling core 25a of the cutting tool 25 stuck approximately at the center of the end surface of the horizontally supported wooden bat WB on the head H side, the rotational main shaft 12 of the rotating part 10 is driven to rotate. The wooden bat WB held by the chuck 13 fixed to the chuck 12 is rotated, and the cutting tool 25 pressed against the tip of the rotating wooden bat WB on the head H side is inserted into the wooden bat WB and the rotating main shaft 12. The cutting tool 25 pressed against the tip of the wooden bat WB due to the rotation of the wooden bat WB cuts the tip of the wooden bat WB into a substantially bowl-shaped (dome-shaped) , a substantially semi-ellipsoidal shape) to form a hole (indentation, recess) 100.

In this manner, in this embodiment, the wooden bat WB is supported horizontally (sideways), and the cutting tool 25 is horizontally moved to the tip of the rotating wooden bat WB on the head H side. Hollow out the tip of the H side of the head into a bowl shape. This makes it possible to reduce the weight of the wooden bat WB and change the center of gravity balance without changing the outer shape (diameter, thickness, and length) of the wooden bat WB.
In addition, the hollowing out of the tip of the head H side of the wooden bat WB is limited to a depth of approximately 3.2 cm (1.25 inches) or less and a diameter of approximately 2.54 to 5.1 cm (1 to 2 inches). The vertical cross section of the hole (indentation, recess) 100 is approximately semi-elliptical and the circumference is curved, that is, the circumferential surface is curved. Furthermore, a small round hole (recess) is formed at the center of the bottom of the bowl-shaped hole 100 by piercing with the drilling core 25a. By hollowing out the tip of the wooden bat WB on the head H side, for example, the wooden bat WB, which originally weighs about 900 g, can be reduced in weight to about 860 g.

As described above, in this embodiment, between the rotating section 10 and the cutting section 20, the chuck 13 fixed to the tip of the rotating spindle 12 that projects horizontally with respect to the headstock 11 of the rotating section 10 cuts the wooden material. Gripping the grip end GE of the bat WB, and rotatably holding the head H side of the wooden bat WB between the plurality of rollers 31A of the support section 30 disposed between the rotating section 10 and the cutting section 20. Thus, the wooden bat WB is supported horizontally between the rotating part 10 and the cutting part 20. A core protrudes horizontally from the tailstock 21 of the cutting part 20 against the head H side end surface of the wooden bat WB held horizontally by the chuck 13 of the rotating part 10 and the plurality of rollers 31A of the support part 30. A cutting tool 25 attached to the tip of the push shaft 22 is pressed against it to pierce the drilling core 25a, thereby positioning the cutting tool 25 for cutting.

In this state, the rotating main shaft 12 of the rotating part 10 is rotated, and the wooden bat WB, which is on the center line of the output of the rotating main shaft 12 of the rotating part 10, is rotated by the rotational output of the rotating main shaft 12 via the chuck 13. With the rotation output of the horizontal rotation main shaft 12 of the rotation part 10, the center line of the horizontally arranged wooden bat WB draws a rotation circle.
At this time, the support part 30 that holds the wooden bat WB between the plurality of rollers 31A has three rollers with respect to the arm part 31B of the clamp part 31 attached to the attachment fixing part 32 which is attached and fixed to the bed 40. 31A is rotatably supported, and as the wooden bat WB held between the rollers 31A rotates, the wooden bat WB is scraped by friction between the rollers 31A and the rollers 31A. The wooden bat WB rotates in synchronization with the rotation of the rotating main shaft 12 without any movement.

Then, while the wooden bat WB horizontally supported by the chuck 13 of the rotating section 10 and the plurality of rollers 31A of the supporting section 30 is rotating between the rotating section 10 and the cutting section 20, the head of the wooden bat WB is rotated. The cutting tool 25, which has pierced the hole core 25a of the cutting tool 25 of the cutting part 20 against the end surface of the H, is linearly moved toward the rotating part 10 side by manual rotation of the handle 24, and the tip of the head H of the wooden bat WB is removed. By pressing and moving the cutting tool 25 against the horizontally supported wooden bat WB, that is, by linear movement of the cutting tool 25 in the horizontal axis direction from the tip side of the horizontally supported wooden bat WB to the opposite side, the wooden bat WB in a rotating state is moved. A bowl-shaped hole 100 is formed by cutting the tip of the head H and hollowing it out in a concave shape.

In this embodiment, the cutting tool 25 is applied to the tip of the wooden bat WB on the head H side while rotating the wooden bat WB in a state where the wooden bat WB is fixed horizontally as described above, and is moved horizontally in a straight line. The tip of the wooden bat WB on the head H side is hollowed out.
Therefore, when cutting a wooden bat WB fixed vertically in the vertical direction, a large load is likely to be applied due to the vertical load. However, in this embodiment, the wooden bat WB fixed horizontally is cut in the horizontal direction, so the load applied to the wooden bat WB can be reduced. It is easy to adjust the load and the weight balance, and even non-experts can easily cut the wooden bat WB without causing bending or cracking. Since excessive force is not easily applied to the wooden bat WB, the weight in grams can be easily adjusted.

In addition, when cutting a wooden bat WB fixed vertically in the vertical direction, chips tend to accumulate inside due to gravity and may damage the cutting surface.Also, it is difficult to see the cutting surface. Whereas skilled cutting techniques are required, in this embodiment, the holes are drilled horizontally, so chips are less likely to accumulate inside and damage the cut surface, and the machined surface is easier to see. Enables precise cutting without the need for Therefore, it is possible to process it at low cost.

In particular, in conventional cutting in the vertical direction of a wooden bat WB fixed in the vertical direction, cutting is performed in the vertical direction of the wooden bat WB by the rotational movement of a cutting tool without rotating the wooden bat WB. In addition to the fact that excessive force is likely to be applied to the bat WB due to the vertical load, and the cutting tool rotates, safety is extremely important.However, in this embodiment, a wooden Since the bat WB is cut in the horizontal direction and the wooden bat WB is cut in the horizontal direction by the rotational movement of the wooden bat WB without rotating the cutting tool 25, the safety of the machining operation is improved. Improves sex.

Furthermore, in this embodiment, the grip end GB of the wooden bat WB is held between the chuck 13 of the rotating section 10 and the wooden bat is held between the rollers 31A of the supporting section 30 disposed between the rotating section 10 and the cutting section 20. By holding the head H side of the bat WB and supporting both sides of the wooden bat WB in the length direction, the cutting tool 25 can be linearly moved in the horizontal direction to cut the tip of the wooden bat WB. The wooden bat WB is less likely to bend due to gravity.
In addition, in this embodiment, the cutting tool 25 is provided with a drilling core 25a, and the drilling core 25a is inserted into the center of the tip surface of the wooden bat WB to position it, and then the cutting tool 25 performs the hollowing. Since cutting is performed after accurately positioning the cutting tool 25, the center position of the hole 100 does not easily shift.
Therefore, in this embodiment, it is possible to perform cutting in which the center of the hole 100 is unlikely to deviate from the central axis of the wooden bat WB, and it is possible to obtain high processing accuracy and finish accuracy with good design even if you are not an expert.

Furthermore, the wooden bat processing device P of the present embodiment rotates the wooden bat WB with the length of the wooden bat WB fixed horizontally between the rotating section 10 and the cutting section 20, and the cutting tool 25 is inserted into the wooden bat. The hole 100 is cut by horizontally linearly moving the tip of the head H side of the WB, and the wooden bat WB is rotated. It is possible to perform a polishing process (grinding process) on the grip G of the bat WB using an abrasive material 61 such as sandpaper. That is, as shown in FIG. 9, by pressing the abrasive material 61 against the grip G of the wooden bat WB, the peripheral surface of the grip G is polished (scraped) by the abrasive material 61 since the wooden bat WB is rotating. ), the grip G is reduced in diameter.

Therefore, it is possible to adjust the grip diameter according to the hand size of the user of the wooden bat WB and the desired ease of grip. Moreover, the weight can also be reduced by polishing the grip G.
Additionally, in order to make the wooden bat WB easier to grip, the grip G is sometimes wrapped with grip tape, but when the grip tape is wrapped, the ease of grip and operability changes by the thickness of the grip tape. However, if you polish the circumferential surface of the grip G by the thickness of the grip tape, you can maintain the same diameter as the original grip even when you wrap the grip tape over it, making it easier to grip without feeling any discomfort. You can maintain operability.
In particular, when the grip G is polished by rotating the wooden bat WB in this manner, even non-experts can polish the peripheral surface uniformly, and it is easy to perform precise polishing with little variation.

That is, in the wooden bat processing device P of the present embodiment, the wooden bat WB is horizontally supported between the rotating section 10 and the cutting section 20 by the rotating section 10 and the supporting section 30, and the wooden bat WB is rotated by the rotating section 10. By applying an abrasive material 61 such as sandpaper to the grip G of the wooden bat WB in this state, the grip G of the wooden bat WB can be polished and made thinner.
At this time, by sticking the drilling core 25a of the cutting tool 25 of the cutting part 20 into the tip surface of the wooden bat WB, the shaft of the horizontally arranged wooden bat WB is supported at both ends, thereby stabilizing it. Therefore, processing accuracy can be further improved.

It is possible to polish the grip G at the same time as hollowing out the tip of the wooden bat WB, or the hollowing out of the tip of the wooden bat WB and the polishing of the grip G can be performed separately. In any case, according to the wooden bat processing device P of this embodiment, if the wooden bat WB is held horizontally between the rotating section 10 and the cutting section 20 by the rotating section 10 and the supporting section 30, Both the hollowing out of the tip of the wooden bat WB and the polishing of the grip G can be performed without changing the direction and arrangement of the wooden bat WB. Therefore, the productivity is high in a short time, and since the tip of the wooden bat WB is hollowed out by rotating the wooden bat WB and the grip G is polished, the tip of the wooden bat WB can be processed with high processing accuracy. Both the hollowing process and the polishing process of the grip G can be performed. Of course, there are cases where only the hollowing out of the tip of the wooden bat WB and the polishing of the grip G are performed.

As described above, the wooden bat processing device P of the present embodiment has a rotation unit that rotatably supports the grip end GE, which is the base end on the grip G side of the wooden bat WB, and rotates the wooden bat WB. 10 and a cutting section 20 that cuts the tip of the wooden bat WB on the head H side opposite to the grip end GE side with the output of the linear motion of the cutting tool 25, and between the rotating section 10 and the cutting section 20. The wooden bat WB is horizontally supported by the rotating part 10 and the supporting part 30 between the rotating part 10 and the cutting part 20, and the rotating part The tip of the wooden bat WB is hollowed out and cut by horizontal linear movement of the cutting tool 25 of the cutting section 20 while the wooden bat WB is rotated by 10.

Therefore, according to the wooden bat processing device P of the present embodiment, the wooden bat WB is arranged horizontally (sideways) between the rotating section 10 and the cutting section 20 and is supported horizontally by the rotating section 10 and the supporting section 30. However, while the wooden bat WB is being rotated by the rotating part 10, the tip of the wooden bat WB is hollowed out and cut by the output of the horizontal (sideways) linear motion of the cutting tool 25; ) and then horizontally cutting the rotated wooden bat WB. Therefore, unlike vertical drilling machine machining that cuts in the vertical direction, it is difficult to apply a vertical load or an excessive load to the wooden bat WB during the cutting operation, making it easy to adjust the load and avoid cutting too deep. It is difficult to cause misalignment, and precise hollow cutting is possible without requiring any skill. Moreover, an excessive load due to a vertical load is not easily applied to the wooden bat WB, and the cutting tool 25 is not rotated to cut the wooden bat WB, but the wooden bat WB is rotated by the rotating part 10 and the wooden bat is cut by the linear movement of the cutting tool 25. Since the tip of the WB is hollowed out and cut, safety in handling the cutting tool 25 and supporting the wooden bat WB is also improved.
In this way, according to the wooden bat processing apparatus P of the above embodiment, it is possible to facilitate the hollowing out operation of the tip of the wooden bat WB and to improve safety.

Furthermore, according to the wooden bat processing device P of the above embodiment, while rotating the wooden bat WB horizontally supported by the rotating part 10, the cutting tool 25 is linearly moved in the horizontal direction to cut the tip of the wooden bat WB. Since the wooden bat WB is rotated, the grip G of the wooden bat WB can be polished (grinded) by applying the abrasive material 61 to the outer surface of the grip G of the wooden bat WB. can. Therefore, both the hollowing out of the tip of the wooden bat WB and the polishing of the grip G can be performed. In particular, since the grip G is polished and made thinner while rotating the wooden bat WB, precise polishing is possible and the finishing accuracy can be improved.

Further, according to the wooden bat processing device P of the above embodiment, the cutting tool 25 of the cutting section 20 has a shape that decreases in diameter toward the tip, so that it is possible to easily hollow out a bowl shape with less resistance.

In particular, according to the wooden bat processing apparatus P of the above embodiment, the cutting tool 25 of the cutting part 20 has a sharp drilling core 25a provided at the tip of the shaft center, and a bowl-shaped shaft formed symmetrically with respect to the shaft center. A pair of radial bottom wiper blades 25b that cut the bottom side of the hole 100 are arranged symmetrically with respect to the axis at predetermined intervals that form a substantially V-shape or a substantially L-shape, and are shaped like a bowl. Since it has a pair of peripheral notch blades 25c in the circumferential direction that cut the peripheral surface side of the hole 100, it is easy to precisely position the center of cutting the wooden bat WB with the sharp drilling core 25a. Can be done. Therefore, it is possible to select the type of wood and to easily perform precise boring (blind hole machining) in which the position of the hole is not easily misaligned or blurred. Therefore, the finishing accuracy of hollow cutting can be improved.

Additionally, a pair of bottom wiper blades 25b in the radial direction are formed symmetrically with respect to the axis and cut the bottom side of the bowl-shaped hole 100, and are arranged at predetermined intervals mutually forming a substantially V-shape or a substantially L-shape. When combined with a pair of circumferential notch blades 25c arranged symmetrically with respect to the axis and cutting the circumferential side of the bowl-shaped hole 100, the discharge of cutting waste is improved. This makes it possible to cut the bottom of the hole into a wider (larger diameter) bowl shape. In addition, the cutting guidance is easy to be accurate, and since it is difficult to apply excessive force to the cutting part, the hole is less likely to be damaged and the positional deviation of the cutting is less likely to occur. Therefore, it is possible to improve finishing accuracy.

Further, since each outer circumferential notch blade part 25c of the cutting tool 25 of the cutting part 20 is radially reduced (diameter reduced) toward the drilling core 25a side, bowl-shaped hollowing can be easily performed with less resistance. can.

Note that when carrying out the present invention, the shape of the cutting tool 25 is not limited to that of the embodiment described above, and for example, the curved (curved) blade on the tip side of the outer circumferential notch blade portion 25c may be provided with serrations (irregularities). ) may be provided to reduce resistance and improve sharpness for efficient cutting (large amount of cutting).

Furthermore, according to the wooden bat processing apparatus P of the above embodiment, the support part 30 supports the wooden bat WB by sandwiching it between the plurality of rollers 31A, so that no load is applied that would damage the wooden bat WB. , the wooden bat WB can be supported more stably, and the wooden bat W is less likely to be bent even when the wooden bat WB is cut in the horizontal direction. Therefore, positional deviation during hollow cutting is less likely to occur, and more precise hollow cutting can be easily performed.

By the way, the above description describes an invention of a method for processing a wooden bat in which the tip of the wooden bat WB on the head H side is cut by the output of the horizontal linear motion of the cutting tool 25 while the wooden bat WB is horizontally supported and rotated. It can also be interpreted as
According to the wooden bat processing method of the above-described embodiment, the wooden bat WB is fixed horizontally (sideways), and while the wooden bat WB is rotated, the output of the horizontal (sideways) linear motion of the cutting tool 25 is used to There is a method in which the tip of the bat WB is hollowed out and cut, and the wooden bat WB is held horizontally (sideways) and the rotated wooden bat WB is cut in the horizontal direction. Therefore, unlike vertical drilling machine machining that cuts in the vertical direction, it is difficult to apply a vertical load or an excessive load to the wooden bat WB during the cutting operation, making it easy to adjust the load and avoid cutting too deep. It is difficult to cause misalignment, and precise hollow cutting is possible without requiring any skill. In addition, an excessive load due to a vertical load is not easily applied to the wooden bat WB, and instead of cutting by rotating the cutting tool, the tip of the wooden bat is hollowed out by rotating the wooden bat WB and linearly moving the cutting tool 25. Since it is used for cutting, the safety of handling the cutting tool 25 and supporting the wooden bat is also improved.
Thus, according to the wooden bat processing method of the above embodiment, it is possible to facilitate the hollowing out operation of the tip of the wooden bat WB and to improve safety.

Furthermore, according to the wooden bat processing method of the above embodiment, the cutting tool 25 is linearly moved in the horizontal direction while the wooden bat WB is rotated to hollow out and cut the tip of the wooden bat WB. Since the wooden bat WB is rotated, the grip G of the wooden bat WB can be polished (grinded) by applying the abrasive material 61 to the outer surface of the grip G of the wooden bat WB.
That is, since the grip G of the wooden bat WB is polished while the wooden bat WB is horizontally supported and rotated, both the hollowing out of the tip of the wooden bat WB and the polishing of the grip G can be performed. In particular, since the grip G is polished and made thinner while rotating the wooden bat WB, precise polishing is possible and the finishing accuracy can be increased.

10 Rotating part 20 Cutting part 25 Cutting tool 30 Support part 31A Roller 25a Drilling core 25b Bottom wiper blade part 25c Periphery notch blade part P Bat processing device G Grip GE Grip end WB Wooden bat

Claims (6)

a rotating part that rotatably supports a grip end of a wooden bat and rotates the wooden bat;
a cutting part that cuts a tip of the wooden bat on the opposite side from the grip end side with a horizontal linear motion of a cutting tool;
a support part disposed between the rotating part and the cutting part and rotatably supporting the wooden bat ;
Equipped with
The cutting tool of the cutting section includes a drilling core provided at the tip of the shaft center, and a pair of bottom wiper blades in the radial direction that are formed symmetrically with respect to the shaft center and cut the bottom side of the hole. a pair of circumferential notch blades disposed symmetrically with respect to the axis at a predetermined interval and cutting the outer circumferential surface side of the hole;
Each of the outer peripheral notch blades of the cutting tool of the cutting part has a shape that is reduced in the radial direction toward the drilling core side,
The wooden bat is horizontally supported by the rotating part and the supporting part between the rotating part and the cutting part, and the cutting tool of the cutting part is horizontally supported while the wooden bat is rotated by the rotating part. A wooden bat processing device characterized in that the tip of the wooden bat is hollowed out and cut by linear motion. a rotating part that rotatably supports a grip end of a wooden bat and rotates the wooden bat;
a cutting part that cuts the tip of the wooden bat on the head side opposite to the grip end side with a horizontal linear movement of a cutting tool;
a support part disposed between the rotating part and the cutting part and rotatably supporting the wooden bat ;
Equipped with
The wooden bat is horizontally supported by the rotating part and the supporting part between the rotating part and the cutting part, and the cutting tool of the cutting part is horizontally supported while the wooden bat is rotated by the rotating part. The tip of the head side of the wooden bat is hollowed out in a longitudinal section by a straight line motion to form a concave shape with a curved inner surface to a depth of 3.2 cm or less and a diameter of 2.54 to 5.1 cm. Wooden bat processing equipment. The wooden bat processing device according to claim 1 or 2 , wherein the cutting tool of the cutting section has a shape that decreases in diameter toward a tip. 3. The wooden bat processing apparatus according to claim 1, wherein the support section rotatably holds the wooden bat between a plurality of rotatable rollers . With the wooden bat horizontally supported and rotated , the cutting tool is horizontally moved in a straight line to cut the tip of the wooden bat on the head side into a concave shape with a curved inner surface and a depth of 3.2 cm or less and a diameter of 2. A method for processing a wooden bat characterized by cutting within a range of 54 to 5.1 cm . With the wooden bat horizontally supported and rotated, the head-side tip of the wooden bat is cut into a concave shape with a curved inner surface and a depth of 3.2 cm or less and a diameter of 2 cm in a longitudinal section by horizontal linear movement of the cutting tool. A method for processing a wooden bat , which comprises cutting within a range of 54 to 5.1 cm and polishing the grip by applying an abrasive to the grip surface of the wooden bat.

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