JPH0220543B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thread winding device that evenly and uniformly winds a thread around the entire circumference of a core material of a golf ball, baseball, or the like.

(Prior Art) For example, as a conventional device for winding a rubber thread around a center ball as a core material of a golf ball, there is a device shown schematically in FIGS. 2 and 3.

Here, in the apparatus shown in FIG. 2, a cylindrical roller a and a drum-shaped roller b are arranged in parallel and spaced apart from each other in a horizontal plane, and the cylindrical roller a is rotated around its axis, for example. The roller a is connected to a rotary drive means that rotates at 1400 rpm, and is connected to a reciprocating drive means that makes the roller a reciprocate in the axial direction at a rate of 1400 cycles/min, for example, and a drum-shaped roller b.
is made rotatable, and furthermore, a center ball c, which extends parallel to these rollers a and b and is supported on them, is pressed from above against these rollers a and b with a predetermined force. This also includes a rotatable cylindrical roller d.

In this device, a center ball c supported by three rollers a, b, and c is connected to a tension adjustment pulley e with a brake and a rubber thread f wound around a drum-shaped roller b. By applying rotational motion and reciprocating motion to the columnar roller a, the center ball c, which is pressed by the columnar roller d against both rollers a and b with a required force,
The drum-shaped roller b rotates in the circumferential direction and axial direction of the cylindrical roller d while maintaining a constant relative position in the axial direction with respect to each roller, and thereby the tension adjustment pulley e and the drum-shaped roller The rubber thread f passing through b is under the action of a constant tension,
It is wound around the outer periphery of the center ball c from all directions.

Furthermore, the apparatus shown in FIG. 3 is provided with two parallel cylindrical rollers g, h arranged apart from each other in a horizontal plane, and these rollers g, h are both moved in the same direction, for example. The rollers are connected to a rotary drive means for rotating at 1400 rpm and a reciprocating drive means for reciprocating them in opposite directions in the axial direction, for example, at 1540 cycles/min. g,
The center ball c supported on the roller h is raised and lowered by a minute amount at a predetermined cycle, for example, 200 cycles/min.In other words, the center ball c is pressed against the rollers g and h with a predetermined cycle, and then Two drum-shaped rollers i and j are provided to release the pressure.

According to this device, four rollers g, h, i,
A rubber thread f is wound around a tension adjustment pulley e with a brake around a center ball c supported at j.
are connected, and in this state both cylindrical rollers g,
By giving rotational motion and reciprocating motion to h and raising and lowering both drum-shaped rollers i and j, center ball c is restrained from relative displacement in the axial direction by drum-shaped rollers i and j. Then, the cylindrical rollers g, h are rotated in the circumferential direction and axial direction, and as a result, the rubber thread f is wound around the outer periphery of the center ball c.

(Problems to be solved by the invention) However, in the prior art shown in FIG.
The reciprocating motion of one cylindrical roller a causes the center ball c to rotate in the axial direction of the cylindrical roller, so the amount of rotation of the center ball c in that direction is insufficient, and therefore the rubber The winding of the thread f becomes uneven as shown in Fig. 4, and the extending direction of the thread cannot be evenly distributed in each direction, making it difficult to obtain a thread wound body that is close to a perfect sphere. In addition, it is generally impossible to wrap a rubber thread f around a soft center ball c without subjecting it to any temporary hardening treatment and preventing the center ball c from deforming. Ta.

On the other hand, in the prior art shown in FIG. 3, since the two cylindrical rollers g and h are reciprocated in opposite directions, the amount of momentum of the center ball c in the axial direction becomes sufficiently large. Although there is an advantage that the winding of the rubber thread f is much better than that of the device shown in FIG. 2, here,
The rubber thread f is caused by the drum-shaped rollers i and j intermittently pressing the center ball c and the rubber thread f.
There is a problem in that the rubber thread f is easily broken because the tension acting on it fluctuates.On the other hand, if the rubber thread f is wound under such tension that the rubber thread f cannot be broken, the thread-wound body Another problem was the inability to provide the required hardness.

The present invention advantageously solves the problems of the prior art, and is capable of sufficiently evenly distributing the extending direction of the wound yarn in each direction, and in addition, it is possible to form a wound body of required hardness without fear of yarn breakage. The purpose of the present invention is to provide a peg winding device that can provide the following effects.

(Means for Solving the Problems) The thread winding device of the present invention includes two cylindrical rollers that are spaced apart from each other in a horizontal plane and extend in parallel to support a spherical body, such as a center ball. These cylindrical rollers are provided with a rotation drive means for rotating them in the same direction and a reciprocating drive means for reciprocating each of them in the axial direction in opposite directions. For example, a drum-shaped roller is provided which is always pressed with a predetermined force on the center ball on those rollers, or in other words, which always presses the center ball against both cylindrical rollers with a predetermined force. .

(Function) With this device, a spherical body supported by both cylindrical rollers and one drum-shaped roller can be rotated in the circumferential direction of the roller at a required rotational speed by the rotational drive of both cylindrical rollers. In addition, both cylindrical rollers,
By reciprocating motion in opposite directions, the spherical body can be rotated at a high speed in the direction of the roller axis, so the amount of rotation of the spherical body in either direction is sufficiently large, and the spherical body When the body rotates, the drum-shaped roller that specifies the axial position of the body is always pressed against the spherical body with a predetermined force, and there is no large tension fluctuation in the thread wound around the spherical body. The extending direction of the thread wound around the spherical body is evenly distributed in each direction, and breakage of the rubber thread, insufficient hardness of the thread body, etc. are effectively eliminated.

(Example) The present invention will be explained below based on illustrated examples.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which reference numeral 1 indicates a base plate extending in a horizontal plane.

Here, a pair of bearing brackets 2a and 2b are fixed to the base plate 1 so as to be spaced apart from each other and facing each other, and two bearing brackets 2a and 2b that are spaced apart from each other and extend parallel to each other are fixed to the base plate 1. Shaft portions 4a, 4 of cylindrical rollers 3a, 3b
b, respectively.

A motor 5 operated by electric power, oil pressure, air pressure, etc. is fixed on the base plate 1, and the motor 5, whose rotational speed is adjusted by an input signal from a control circuit (not shown), is connected to a pulley 6 and a belt. 7, it is directly connected to a pulley 8 attached to one end portion of one shaft 4b, and is connected to the other shaft via another pulley and a belt 9 provided adjacent to the pulley 8. It is indirectly connected to a pulley 10 provided at one end portion of the portion 4a. Here, these motors, pulleys, and belts constitute a rotation driving means 11 for the cylindrical rollers 3a, 3b, and this means 11 rotates both the rollers 3a, 3b in the same direction at a uniform speed according to the requirements. be able to.

On the other hand, rack gears 12a and 12b whose teeth face each other are attached to the other end portions of the shaft portions 4a and 4b, for example via bearings, so as to be rotatable relative to the respective shaft portions.
A reciprocating drive means 15 for the cylindrical rollers 3a and 3b is configured by connecting one pinion gear 13 that meshes with the rollers a and 12b to a motor 14. According to this reciprocating drive means 15, the rack gears 12a, 1
2b, and in turn, the cylindrical rollers 3a, 3b can be reciprocated in opposite directions at a required cycle time, regardless of whether or not the rollers 3a, 3b rotate. In addition, during such reciprocating motion of the cylindrical rollers 3a, 3b, the pulley attached to one end portion of the shaft portions 4a, 4b is fitted with a spline to the shaft portions 4a, 4b, so that the pulley has a bearing relative to the pulley. The pulleys are maintained at a predetermined position in the axial direction by a guide member (not shown) that allows relative displacement of the pulleys 4a and 4b, and that allows the pulleys to rotate but restricts movement in the axial direction.

Further, in the figure, 16a and 16b indicate the guide members of the rack gears 12a and 12b, respectively.
6b ensures smooth reciprocating motion.

Further, reference numeral 17 in the figure indicates a drum-shaped roller composed of one divided body, and this drum-shaped roller 17 extends parallel to the cylindrical rollers 3a and 3b but is located above these rollers 3a and 3b. is rotatably supported by a bearing bracket 18, and both rollers 3
As an example of the spherical body placed on a and 3b, it can come into contact with the center ball 19 from directly above it. Also, in this example, the bearing bracket 18
is connected to, for example, an air cylinder 20, and by the action of this cylinder 20, the bearing bracket 18 and hence the drum-shaped roller 17 can be raised and lowered in the vertical direction under the guidance of the bearing bracket 18 by the guide roller 21, and a predetermined force is applied. so that it can be pressed onto the center ball 19.

Note that the air cylinder 20 may be replaced with a weight, an elastic member, or the like that functions only to apply a predetermined pressing force to the center ball 19.

In the device configured in this way, a rubber thread is attached to a center ball 19 that is supported by two cylindrical rollers 3a and 3b and is pressed downward with a predetermined force by one drum-shaped roller 17. When winding the rubber thread 24, the rubber thread 24 is passed through the guide roller 22 and wound around the pulley 23 with a brake, and the rubber thread 24 is connected to the center ball 19.
are rotated in the same direction at a speed of, for example, 1000 to 1400 rpm, and the rollers 3a and 3b are also reciprocated in opposite directions by the reciprocating drive means 15, also at a speed of, for example, 1100 to 1500 cycles/min.

As a result, the rotation and reciprocation of the rollers are controlled at specified values, and the three rollers 3
The center ball 19 is supported by the rollers 3a, 3b, and 17 as if being held between the rollers 3a, 3b, and 17.
The rubber thread 24 is wound around the center ball 19 evenly in the circumferential direction and the axial direction under sufficient momentum.
It becomes almost uniform over the entire circumference of 9. Therefore, it is possible to obtain a thread wound body that is close to a perfect sphere, and it is also possible to effectively prevent the deformation of the soft center ball 19 and to wind the rubber thread 24 directly thereon. In addition, the drum-shaped roller 17
is constantly pressed against the center ball 19 with a predetermined force under the action of the air cylinder 20, so that the tension acting thereon does not change at all or almost during the winding of the rubber thread 24. Without,
Therefore, without fear of breaking the rubber thread 24,
It can be wound sufficiently tightly around the center ball 19 under sufficiently large tension.

Here, the rotational speed of the motors 5 and 14 is determined based on signals from the control circuit according to the type of rubber thread 24, the diameter of the center ball 19, the winding diameter of the rubber thread 24, etc., so as to determine the most ideal rubber thread path. Of course, the diameter of the center ball 19 and the diameter of the rubber thread 24 can be adjusted appropriately to form the cylindrical roller 3.
It can be measured by detecting the relative position of the drum-shaped roller 17 with respect to a and 3b.

Although this invention has been explained above based on illustrated examples,
It is also possible to use a gear mechanism as the pulley and belt of the rotary drive stage, and to use a cylinder device or other known reciprocating drive device as the reciprocating drive means. The same can be applied to other cases as well.

(Effects of the Invention) Therefore, according to the present invention, in particular, the two cylindrical rollers are rotated and reciprocated in opposite directions, and the drum-shaped roller is used to steady the spherical body with a predetermined force. By configuring the structure so that it can be pressed symmetrically, the extending direction of the thread wound around the spherical body can be evenly distributed in each direction, and as a result, a spool that is close to a perfect sphere can be obtained, and the spherical body can be pressed evenly. Regardless of whether it is soft or hard, it is possible to always apply appropriate thread winding. Furthermore, since there is no tension variation in the thread wound around the spherical body, it is possible to wind the thread around the spherical body sufficiently tightly without fear of thread breakage.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIGS. 2 and 3 are schematic diagrams showing conventional examples, and FIG. 4 is a front view showing a bobbin body formed by the device shown in FIG. 2. 3a, 3b...Cylindrical roller, 4a, 4b...
Shaft portion, 5, 14... Motor, 6, 8, 10... Pulley, 7, 9... Belt, 11... Rotation drive means, 12a, 12b... Rack, 13... Pinion, 15... Reciprocating drive Means, 17... drum-shaped roller,
19...Center ball, 20...Air cylinder, 24...Rubber thread.

Claims (1)

[Claims] 1 Two cylindrical rollers extending parallel to each other in a horizontal plane to support a spherical body, a rotation drive means connected to these cylindrical rollers to rotate both cylindrical rollers in the same direction, and each A reciprocating drive means that reciprocates the cylindrical rollers in mutually opposite directions in the direction of their axes, and a drum that extends parallel to both cylindrical rollers and is always pressed onto the spherical body with a predetermined force. A bobbin winding device comprising a shaped roller.