How billiard cues are manufactured

Abstract

To solve such problems that it is somewhat difficult to strongly hit a cue ball in a prescribed direction with a shaft of the conventional billiard cue and that an abnormal sound is generated when being used for a long period of time.SOLUTION: A manufacturing method of a billiard cue includes: laterally arranging and laminating, in a hole of a shaft, a large number of carbon-reinforced plastic fibers with a large lateral width in a central part; laterally arranging and laminating glass-reinforced plastic fibers with a small lateral width in an upper end and a lower end; inserting a circular pipe storing a cushioning material of a circular foamed synthetic resin in a hole of a circular pipe made of belt-like fibers, into the hole of the shaft; and fixing a wood shaft storing the circular pipe and a wood bat with a detachable tool.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a billiard cue having a wooden shaft and a circular wooden butt. In particular, the present invention relates to a method for manufacturing a billiard cue that has good control over the bending of the shaft when the cue ball is struck, has an internal structure that will not break even after long-term use, and does not emit abnormal noises to the outside. [Background technology]

[0002] A conventional method for manufacturing a billiard cue involves inserting six pillar-shaped pieces of wood cut into a sector-shaped (pie-shaped) cross section in the longitudinal direction at the center of the shaft (see Patent Document 1 and Published Japanese Translation of PCT International Publication No. H11-502428 below).

[0003] However, shafts manufactured using the manufacturing method described in JP 11-502428 A have the disadvantage that it is somewhat difficult to bend and control the shaft when striking the cue ball with the tip of the shaft, making it somewhat difficult to strike the cue ball forcefully in the desired direction. [Prior art documents] [Patent documents] [Patent documents] Special Publication No. 11-502428 Summary of the Invention

[0004] Problem to be solved by the invention

[0005] This invention aims to overcome the above-mentioned drawbacks and to enable the cue ball to be struck in a predetermined direction with a predetermined force for a long period of time in a stable condition. Furthermore, the invention is one that does not lose its internal structure even after long-term use, does not emit abnormal noises, and can mass-produce a single billiard cue at low cost.

[0006] In this invention, a circular pipe to be inserted into a circular hole in the circular wooden shaft of a billiard cue has a large number of wide carbon reinforced plastic fibers arranged horizontally in the center and laminated horizontally, a large number of narrow glass reinforced plastic fibers arranged horizontally at the upper end, a large number of narrow glass reinforced plastic fibers arranged horizontally at the lower end, and a large number of slightly wider glass reinforced plastic fibers arranged horizontally at the right end, each of which is a single unit of ribbon-like fiber connected horizontally. This long ribbon of fiber is impregnated with a thermosetting resin liquid and then cut to a predetermined length just before the end of winding. The ribbon of fiber is then wound around a mandrel to form a dried circular pipe. The circular pipe is pulled out from the mandrel and dried at a specified temperature. The circular pipe with the cushioning material stored in the hole is inserted into the circular hole of the wooden shaft, and the circular wooden butt and the circular wooden shaft are attached with a detachable tool to manufacture the billiard cue.

[0007] Claim 1 of the billiard cue of this invention comprises a long horizontal strip of fiber made from a wide carbon reinforced plastic fiber laminate in the center, a narrow glass reinforced plastic fiber laminate at the top end, and a slightly wider glass reinforced plastic fiber laminate at the bottom end, which are then impregnated with a thermosetting resin liquid and bonded together at the same time. The long strip of fiber is then moved horizontally and wound around a mandrel, and just before the end, it is cut and wound around the mandrel to make a circular pipe, which allows for continuous mass production of circular pipes and reduces the manufacturing cost of each circular pipe. A long circular foamed synthetic resin cushioning material is stored in the hole of the circular pipe, so that the impact given to the wooden part of the wooden shaft can be softened, abnormal noise can be eliminated, and the wooden part of the shaft can be prevented from being damaged. Due to this effect, damage to the wooden portion of the shaft can be prevented, so that the shaft and other components of the billiard cue can be used in good condition for a long period of time. Advanced players, taking advantage of the characteristics of the relatively strong long carbon fiber-reinforced plastic fibers, can strike the cue ball with great force slightly to the right of the center line, causing the wooden shaft to bend significantly (Figure 19, symbol 75). The strong rebound force creates a strong pushing force to return the cue ball to its original position, and the pushing force of the arm when striking the billiard cue combine to create a large force that hits the cue ball (Figure 19, symbol 71) hard in the direction of symbol 76 in Figure 19. Furthermore, because the part of the billiard cue that first hits the cue ball is the short, hollow glass fiber reinforced plastic fiber with a circular cross section at the tip, glass fiber reinforced plastic fiber has less strength than carbon fiber reinforced plastic fiber, so advanced players can take advantage of the slightly stronger long carbon fiber reinforced plastic fiber to hit the ball from the beginning. Advanced players can also take advantage of the slightly stronger long carbon fiber reinforced plastic fiber to strike the cue ball with great force slightly to the right of the center line, causing the wooden shaft to bend significantly (reference number 75 in Figure 20), and the strong force that combines the strong pushing force that returns to its original position due to this rebound force and the pushing force of the arm when hitting the billiard cue allows the cue ball (reference number 71 in Figure 20) to be hit hard in the direction of reference number 76 in Figure 20. Effects of the Invention

[0008] Claim 2 of the billiard cue of this invention has a large width carbon reinforced plastic fiber laminate in the center, a slightly larger width glass reinforced plastic fiber laminate at the upper end and a smaller width glass reinforced plastic fiber laminate at the lower end, and the small width glass reinforced plastic fiber laminate and the slightly larger width glass reinforced plastic fiber laminate at the lower end are made into a long horizontal strip of fiber, which is impregnated with a thermosetting resin liquid and bonded together at the same time, and then the long strip of fiber is redirected slightly upwards and wound around a mandrel, and just before the end it is cut and wound around the mandrel to make a circular pipe, which makes it possible to mass-produce circular pipes continuously and reduce the manufacturing cost of each circular pipe. A long circular foamed synthetic resin cushioning material is stored in the hole of the circular pipe, so that the impact given to the wooden part of the wooden shaft can be softened, abnormal noise can be eliminated, and the wooden part of the shaft can be prevented from being damaged. These effects allow the shaft to be used stably for a long period of time, and beginners can initially use the billiard cue to strike the cue ball with little force and easily strike the cue ball in a predetermined straight line.

[0009] Claim 3 of the billiard cue of this invention relates to a method in which a large carbon reinforced plastic fiber laminate in the center, a small glass reinforced plastic fiber laminate at the upper end, and a small glass reinforced plastic fiber laminate at the lower end are connected in large numbers horizontally to form long ribbon-like fibers, and the long ribbon-like fibers can be simultaneously and integrally bonded by spraying a thermosetting resin liquid onto the long ribbon-like fibers. This integrally bonded long strip-like fiber is cut just before winding around the mandrel is completed and then wound around the mandrel to make a circular pipe, so that circular pipes can be mass-produced continuously and the manufacturing cost of each circular pipe can be reduced. A long circular foamed synthetic resin cushioning material is stored in the hole of the circular pipe, so that the impact given to the wooden part of the wooden shaft can be softened, abnormal noise can be eliminated, and the wooden part of the shaft can be prevented from being damaged. These effects allow the shaft, etc. to be used stably for a long period of time, and particularly enable beginners to strike the cue ball with a billiard cue with little force from the very beginning and to easily strike the cue ball in a predetermined straight line, etc. These effects allow shafts and the like to be used stably for a long period of time. In the event that the hollow glass fiber reinforced plastic fiber with a circular cross section and a short width at the tip becomes damaged over time, the circular pipe can be removed from the wooden shaft, turned over and inserted into the hole in the shaft, allowing the cue to continue being used as a billiard cue.

[0010] Claim 4 of the billiard cue of this invention relates to a billiard cue manufactured by the billiard cue manufacturing method described in claims 1 to 3, in which a thin thread coated with adhesive is continuously wound in a spiral shape around the outside of the synthetic resin film covering the circular pipe, and then heated, so that the synthetic resin film covering the circular pipe shrinks, eliminating surface irregularities of the circular pipe. This makes it easier to insert the circular pipe into the circular hole of the wooden shaft, and also allows the circular pipe to be tightly attached to the circular hole of the wooden shaft. This can eliminate the generation of abnormal noises when using the billiard cue, and can also almost completely eliminate the impact on the wooden part of the shaft.

[0011] Claim 5 of the billiard cue of this invention relates to a billiard cue manufactured by the billiard cue manufacturing method described in claims 1 to 3, in which the circular pipe of the billiard cue is covered with a synthetic resin film coated with an adhesive, and a thin thread coated with an adhesive is continuously wound in a spiral shape around the outside of the synthetic resin film, and a hook loop is provided at the end of the thin thread and heated, so that the synthetic resin film covering the circular pipe shrinks and the surface of the circular pipe eliminates surface irregularities. This allows the circular pipe to be easily inserted into the circular hole of the wooden shaft, and allows the circular pipe to be tightly fitted into the circular hole of the wooden shaft, and the tight fit between the two components prevents abnormal noise when the billiard cue is used and almost completely eliminates impact on the wooden part of the shaft. When the new circular pipe is to be inserted into the shaft, it can be easily inserted by inserting the hook at the tip of the metal rod into the loop of thread wrapped around the circular pipe and pulling it backward with the metal rod. Furthermore, when the circular pipe becomes damaged after a long period of use of the billiard cue and needs to be removed from the hole in the shaft, a hook on the end of a long wire can be inserted into a loop of thread at the tip of a thin string, and the circular pipe can be easily pulled out from the shaft with the long wire. The new circular pipe can be inserted into the hole in the shaft as described above and reused as a billiard cue. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a plan view of the first billiard cue. [Diagram 2] FIG. 2 is a plan view of a first long ribbon-shaped fiber. [Diagram 3] FIG. 2 is a side view of the first manufacturing machine. [Figure 4] FIG. 2 is a cross-sectional view of the first shaft. [Diagram 5] FIG. 4 is a longitudinal sectional view of a first shaft. [Figure 6] FIG. 2 is a plan view of a second billiard cue. [Figure 7] FIG. 2 is a plan view of a second long ribbon fiber. [Figure 8] FIG. 2 is a side view of the second manufacturing machine. [Figure 9] FIG. 4 is a cross-sectional view of the second shaft. [Figure 10] FIG. 4 is a longitudinal sectional view of a second shaft. [Figure 11] FIG. 2 is a plan view of the third billiard cue. [Figure 12] FIG. 11 is a plan view of a third long ribbon fiber. [Figure 13] FIG. 11 is a side view of the third manufacturing machine. [Figure 14] FIG. 4 is a cross-sectional view of a third shaft. [Figure 15] FIG. 4 is a longitudinal cross-sectional view of a third shaft. [Figure 16]FIG. 2 is a cross-sectional view of a circular pipe. [Figure 17] FIG. 13 is a cross-sectional view of another circular pipe. [Figure 18] FIG. 2 is a plan view of a long wire. [Figure 19] FIG. 13 is an explanatory diagram of the shaft when in use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0013] As shown in Figs. 1 to 5, a billiard cue 1 is made of a circular wooden shaft 2 and a circular wooden butt 3. A hollow hole 2A with a circular cross section is provided through the shaft from the tip to the rear end. In the hollow hole of the shaft, a large number of carbon reinforced plastic fibers 4 having a large width are arranged horizontally and layered in the horizontal direction in the center, a large number of glass reinforced plastic fibers 5 having a small width are arranged horizontally and layered in the horizontal direction in the upper end, and a glass reinforced plastic fiber having a slightly larger width is arranged horizontally and layered in the horizontal direction in the lower end. A long strip of plastic fiber 7 is formed by arranging many strands of plastic fiber 6 horizontally and layering them to form a strip. The long strip of fiber 7 is moved by a rotating roll from the horizontal direction to a diagonally downward direction and then to a diagonally upward direction through a container 8 filled with thermosetting resin so as to be impregnated with the thermosetting resin liquid. After that, the long strip of fiber is moved horizontally and cut to a predetermined length by a cutter 9 just before the winding is completed. The strip of fiber of only the predetermined length is then wound around a mandrel 12 by two rotating rolls 10A and 10B at the bottom and one rotating roll 11 at the top to produce a circular pipe 13. This circular pipe is removed from the three rotating rolls and allowed to dry naturally to slightly harden the thermosetting resin liquid. After that, the mandrel is removed from the circular pipe. The circular pipe is first dried in a high temperature oven at about 100 degrees C for about 30 minutes, then the oven temperature is increased to about 60 degrees C for about 30 minutes, and finally allowed to dry naturally to complete the circular pipe. A circular pipe containing a long foamed synthetic resin cushioning material 14 with a circular cross section is inserted into the circular hole of the wooden shaft, and the shaft and the butt are fixed with a detachable tool to make a billiard cue. EXAMPLES

[0014] As shown in Figures 6 to 10, a billiard cue 21 is made of a circular wooden shaft 22 and a circular wooden butt 23, and a hollow hole 22A with a circular cross section is provided through the cylindrical shaft from the tip to the rear end. In the hollow hole with a circular cross section that penetrates this shaft, a large number of carbon reinforced plastic fibers 24 with a large width are aligned horizontally and stacked in the center, a large number of glass reinforced plastic fibers 25 with a slightly larger width are aligned horizontally and stacked in the upper end, and a large number of glass reinforced plastic fibers 26 with a small width are aligned horizontally and stacked in the lower end to form a long belt-like fiber 27. This is turned vertically by a rotating roll 28, and the thermosetting resin liquid is sprayed from both the left and right sides of the belt-like fiber by a sprayer 29 to impregnate it with the thermosetting resin liquid. The strip-shaped fiber impregnated with the thermosetting resin liquid is moved slightly upward from the horizontal direction by a guide roll, and then moved horizontally, and just before the winding is completed, it is cut to a specified length by a cutter 30, and the strip-shaped fiber of the specified length is wound around the mandrel by rotating two winding rolls 32A and 32B below the mandrel 31 and rotating one winding roll 33 above the mandrel 31 to form a circular pipe 34. Furthermore, the thermosetting resin liquid impregnated in this circular pipe is naturally dried, and the circular pipe with the thermosetting resin liquid slightly hardened is first dried in an oven at a temperature of about 100°C for about 30 minutes, then dried in an oven at a temperature of about 60°C for about 30 minutes, and then naturally dried to form a circular pipe. Into the circular hole of this circular pipe, a circular pipe containing a long foamed synthetic resin cushioning material 35 with a circular cross section is inserted, and the wooden butt and the wooden shaft are fastened together with a detachable tool to produce a billiard cue. EXAMPLES

[0015] As shown in Figures 11 to 15, a billiard cue 41 is made of a circular wooden shaft 42 and a circular wooden butt 43, and has a cylindrical shaft with a hollow hole 42A with a circular cross section penetrating from the tip to the rear end. In the hollow hole with a circular cross section that penetrates this shaft, a large number of carbon reinforced plastic fibers 44 with a large width are arranged horizontally in the center and stacked horizontally, and a large number of glass reinforced plastic fibers 45A, 45B with a small width are arranged horizontally at the upper and lower ends and stacked horizontally to form strip-shaped fiber 46, and a large number of long strip-shaped fibers 47 are arranged horizontally and stacked horizontally to form a strip. This long strip-shaped fiber 47 is turned vertically by a rotating roll 48, and a thermosetting resin liquid is sprayed from both the left and right sides of the long strip-shaped fiber by a sprayer 49 to impregnate the long strip-shaped fiber with the thermosetting resin liquid. The long strip-shaped fiber impregnated with the thermosetting resin liquid is then guided diagonally upward by a guide roll, then moved horizontally, and then diagonally downward, and just before winding is completed, cut to a specified length by a cutter 50. Two winding rolls 52A and 52B are rotated below a mandrel 51, and one winding roll 53 is rotated above the mandrel, and the strip-shaped fiber of the specified length is wound around the mandrel to form a circular pipe 54. Furthermore, the thermosetting resin liquid impregnated in this circular pipe is allowed to dry naturally, and the circular pipe with the thermosetting resin liquid slightly hardened is first dried in an oven at a temperature of about 100°C for about 30 minutes, then dried in an oven at a temperature of about 60°C for about 30 minutes, and then naturally dried to form a circular pipe. Into hole 54A of this circular pipe, a circular pipe containing long foamed synthetic resin cushioning material 55 with a circular cross section is inserted into the circular hole of the wooden shaft, and the wooden butt and the wooden shaft are fastened together with a detachable tool to produce a billiard cue. EXAMPLES

[0016] As shown in FIG. 16, the circular pipe 61 of a billiard cue manufactured by the method for manufacturing a billiard cue described in claims 1 to 3 is a circular pipe covered with a synthetic resin film 62, with a thin thread 63 coated with adhesive wound continuously in a spiral shape on the outside and heated, and a long foamed synthetic resin cushioning material 64 with a circular cross section housed in a hole 61A of the circular pipe. EXAMPLES

[0017] As shown in FIG. 17, the circular pipe 65 of a billiard cue manufactured by the method of manufacturing a billiard cue described in claims 1 to 3 is a heated circular pipe covered with a synthetic resin film 66 and having a thin thread 67 coated with an adhesive applied to the outside of the film continuously wound in a spiral shape to form a loop 67A for a hook at the front end of the thin thread, and a hole 65A of the circular pipe houses a long foamed synthetic resin cushioning material 68 with a circular cross section. The loop for the hook may be the rear end of a thin thread. [Industrial Applicability]

[0018] This invention allows for the mass production of billiard cues, and allows anyone to use the billiard cue to strike the cue ball in a straight line. Furthermore, it allows the cue ball to bend relatively easily, which contributes to the development of the billiard cue industry.

Claims

1. In a billiard cue having a circular wooden shaft and a circular wooden butt, a circular pipe to be inserted into a circular hole in the circular wooden shaft is formed by arranging many carbon reinforced plastic fibers having a large width in the horizontal direction in the center and laminating them in the horizontal direction, arranging many glass reinforced plastic fibers having a small width in the horizontal direction in the upper end and laminating them in the horizontal direction, and arranging many glass reinforced plastic fibers having a slightly larger width in the horizontal direction in the lower end and laminating them in the horizontal direction to form a horizontally long ribbon-like fiber, and then impregnating the long ribbon-like fiber with the thermosetting resin liquid by changing the direction from horizontal to a diagonally downward direction and then to a diagonally upward direction and moving the long ribbon-like fiber in a container containing the thermosetting resin liquid, and then impregnating the long ribbon-like fiber with the thermosetting resin liquid. a circular pipe formed by winding a strip of fiber around a mandrel, moving the fiber horizontally and winding the fiber around the mandrel, and just before the end, cutting the fiber to a predetermined length and winding only the predetermined length of the strip of fiber around the mandrel, naturally drying the circular pipe to slightly harden the thermosetting resin liquid, removing the mandrel from the circular pipe, first drying the circular pipe in a high temperature oven at about 100 degrees C for about 30 minutes, then drying the circular pipe at an oven temperature of about 60 degrees C for about 30 minutes, and naturally drying the circular pipe to form a circular pipe, inserting a circular pipe containing a long, circular cross-section foamed synthetic resin cushioning material into a circular hole in the circular pipe, and fastening the circular wooden butt and the circular wooden shaft with a detachable device.

2. In a billiard cue consisting of a circular wooden shaft and a circular wooden butt, a circular pipe to be inserted into a circular hole in the circular wooden shaft is formed by arranging many carbon reinforced plastic fibers having a large width in the center and laminating them in the horizontal direction, arranging many glass reinforced plastic fibers having a slightly large width in the horizontal direction at the upper end and laminating them in the horizontal direction, and arranging many glass reinforced plastic fibers having a small width in the horizontal direction at the lower end and laminating them in the horizontal direction to form a horizontally long ribbon-like fiber, changing the horizontal direction of the long ribbon-like fiber to a vertical direction, and spraying a thermosetting resin liquid from both the left and right sides of the long ribbon-like fiber to impregnate the long ribbon-like fiber with the thermosetting resin liquid, and then forming the long ribbon-like fiber into a shape similar to that of the long ribbon-like fiber. a circular pipe formed by changing the direction of the fiber from horizontal to downward and cutting it to a predetermined length just before the end of winding, and winding only the predetermined length of the strip-shaped fiber around a mandrel, the circular pipe is naturally dried to slightly harden the thermosetting resin liquid, the mandrel is then removed from the circular pipe, the circular pipe is first dried in a high-temperature oven at about 100°C for about 30 minutes, then dried in an oven at about 60°C for about 30 minutes, and then naturally dried to form a circular pipe, a circular pipe containing a long, circular cross-section foamed synthetic resin cushioning material is inserted into a circular hole in the circular pipe, and the circular wooden butt and the circular wooden shaft are fastened together with a detachable device.

3. In a billiard cue consisting of a circular wooden shaft and a circular wooden butt, a circular pipe to be inserted into a circular hole in the circular wooden shaft has a large number of carbon reinforced plastic fibers arranged horizontally in the center and stacked horizontally, and a large number of glass reinforced plastic fibers having a small width arranged horizontally at the upper and lower ends to form a long horizontal strip-like fiber, the long strip-like fiber is changed from a horizontal to a vertical direction and a thermosetting resin liquid is sprayed from both the left and right sides of the long strip-like fiber to impregnate the long strip-like fiber with the thermosetting resin liquid, and the long strip-like fiber is then changed from a downward direction to an upward direction, then changed to a horizontal direction, and then changed again to a downward direction and wound. a circular pipe made by winding a strip of fiber of only the specified length around a mandrel, the thermosetting resin liquid contained in the circular pipe is allowed to dry naturally, and the mandrel is then removed from the circular pipe in which the thermosetting resin liquid has slightly hardened. The circular pipe is then first dried in a high temperature oven at about 100°C for about 30 minutes, then dried in an oven at about 60°C for about 30 minutes, and then naturally dried to form a circular pipe, a circular pipe containing a long, circular cross-section foamed synthetic resin cushioning material is inserted into a circular hole in the circular pipe, and the circular wooden butt and the circular wooden shaft are attached with a detachable device.

4. 4. The method for manufacturing a billiard cue according to claim 1, wherein the circular pipe is covered with a synthetic resin film and a thin thread coated with an adhesive is continuously wound around the outside of the synthetic resin film in a spiral shape and heated.

5. 4. The method for manufacturing a billiard cue according to claim 1, wherein the circular pipe is covered with a synthetic resin film and an adhesive is applied to the outside of the film, and a thin thread having a loop for a hook is continuously wound in a spiral shape around one of the front and rear ends of the circular pipe, and then heated.

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