JPS5911017Y2 - Eyelet body extraction device for badminton racket gut punching - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for extracting a gut eyelet body that is fitted at a predetermined interval on the periphery of a metal frame of a badminton racket.

As is well known, the metal frame of a badminton racket has a string insertion hole drilled in its periphery to form a net-like ball hitting surface by extending the string in the longitudinal direction. In the case where the ball-hitting surface is shaped by directly inserting the gut, the gut is stretched under tension.
In particular, the contact resistance is concentrated at the portion that abuts and bites into the edge of the insertion hole, and this portion deteriorates more quickly than other portions and is inconveniently cut.

For this reason, in recent years, rackets have been developed in which a hollow eyelet body made of abrasion-resistant resin material is fitted into a string insertion hole, and a string is stretched through the eyelet body to shape the ball-striking surface. is put into practical use.

However, while using the racket, the part of the eyelet body that contacts the string wears and deforms due to the tension of the string, and eventually breaks, so it is important to prevent the string from breaking. In order to protect the ball hitting surface, it is necessary to replace the damaged eyelet body with a new one.

However, the eyelet body as described above has a flange formed on the edge, and the entire outer circumferential surface of the cylindrical part is tightly fitted into the string insertion hole, which can cause damage, especially to the metal frame of the racket. It is considered the most difficult task in manual labor to remove the gut without any damage, and even an experienced person takes about 40 to 50 minutes to remove a single eyelet.

In light of these circumstances, we have developed an eyelet body extraction device that allows the eyelet body to be extracted extremely easily and quickly without causing any damage to the metal frame, thereby efficiently performing the work of replacing the tensioning of the gut. The emergence of this was a pressing issue and was strongly desired in this type of sporting goods industry.

In view of the above-mentioned circumstances, this invention was devised to meet the demands of this type of sporting goods industry. A cone-shaped body is provided in a detachable manner, and a pair of clamping arms are elastically mounted on both ends of a bearing part that rotatably supports the rod, and a clamping claw formed at the tip of the clamping arm is screwed. By arranging the eyelet body to be closely opposed to the base end of the cone and to be removed by the cooperation of the screw-like cone and the clamping arm, the metal frame of the racket can be removed without causing any damage to the metal frame of the racket. Moreover, any person can remove the eyelet body very easily and quickly without any experience in removing the eyelet body, thereby making the work of stringing and replacing the strings more efficient. The object of the present invention is to provide a device for extracting an eyelet body for inserting a gut into a batmint racket.

The structure of the present invention will be explained with reference to an embodiment shown in the drawings. A is a badminton racket, and the rackets 1 to A are made up of a grip 1 and a loop-shaped metal rack, as is well known. Gut insertion holes 3 are bored at a predetermined interval on the periphery of the metal frame 2, and the string insertion holes 3 have hollow holes with flanges protruding at the ends. A shaped eyelet body 4 is tightly fitted, and a gut 5 is stretched in the longitudinal direction through the hollow part of the eyelet body 4 to form a ball hitting surface 6.

Reference numeral B denotes an extraction device for the eyelet body 4 according to the present invention, and the extraction device B is constructed as follows.

That is, 7 is a screw-shaped cone that is screwed into the hollow part of the eyelet body 4, and the base 7a of the screw-shaped cone is detachably screwed into one end of the rod 8.

The rod 8 is loosely fitted and rotatably supported by bearings 9, 9, and both ends of the bearings 9, 9 extend perpendicularly to the rod 8 to form a hollow cylindrical shaft 9a, 9a is prominent.

In the hollow portions of the cylinder shafts 9a, 9a, ammunition 10.
10 and a slider 11.11 are loaded, and a pin 12.12 implanted in the slider 11.11 is attached to the cylinder shaft 9.
They are engaged with elongated holes 13, 13 bored in holes a, 9a.

14.14 is a tightening tool 1 attached to the outer end of the slider 11.11.
A pair of supporting arms 14, 14 are elastically mounted to open and close via 5.15. The ends are placed close to each other and arranged in a row.

Incidentally, reference numeral 17 denotes an attachment portion for a rotating operation handle attached to the other end of the rod 8.

Next, the operation of the present invention constructed as described above will be explained.

Now, when removing the damaged eyelet body 4 using the present invention, first push the tip of the screw-like cone 7 into the hollow part of the eyelet body 4, and rotate the rod body 8 to remove the screw-like shape. After screwing the cone 7 up to its protruding base end, the gripping arms 14, 14 are grasped to lock the gripping claws 16, 16 at the tips to the collar body of the eyelet body 4.

Next, when the eyelet body 4 is pulled in the direction to remove it, the eyelet body 4, which is tightly fitted into the gut insertion hole 3, will absorb the contact friction force caused by the threaded cone 7 screwed into the hollow part and the flange of the eyelet body 4. Due to the synergistic cooperation with the locking force of the clamping claws 16, 16 that are locked to the body, the metal frame 2 of the racket A can be pulled out very easily and quickly without causing any damage.

In addition, the metal frame 2 of the racket A is shaped such that both circumferential edges protrude from the fitting surface of the eyelet body 4 for its strength, but the rod body 8 fitted with the screw-like cone body 7 can be rotated. The movably supported bearing part 9 is rotatable relative to the rod 8, so if the bearing part 9 is rotated,
Along with this, the pair of supporting arms 14.14, which are elastically mounted on both ends of the bearing part 9 so as to be openable and closable, also rotate with respect to the rod body 8, so that when the eyelet body 4 is removed, both sides of the metal frame 2 of the racket A are rotated. If the edge gets in the way, simply remove the bearing part 9.
This can be easily avoided by simply adjusting the rotation accordingly.
Therefore, the clamping claws 16, 16 formed at the tips of the supporting arms 14, 14 are always maintained in an optimal state for easy extraction, and the extraction operation of the eyelet body 4 can be carried out smoothly and efficiently.

Moreover, since the screw-like cone 7 is removably screwed into the rod 8, if the screw-like cone 7 is replaced and used as appropriate, it can be attached to the metal frame 2 of various types of rackets A. This is extremely convenient because the fitted eyelet body 4 can be removed.

In addition, in the above embodiment, a badminton racket was explained, but the invention is not limited to this.
Naturally, this method can also be applied to tennis rackets.

In short, the present invention provides a threaded cone that is detachably screwed into the hollow part of the eyelet body for string insertion fitted to the periphery of the racket frame at one end of the rod, so that the rod can be freely rotated. A pair of supporting arms are elastically mounted on both ends of the bearing portion to freely open and close, and a clamping claw shaped at the tip of the clamping arm is arranged close to and opposed to the protruding base end of the screw-shaped cone. Since the general-purpose eyelet body is designed to be extracted by the cooperation of the screw-like cone and the supporting arm, the eyelet body extraction work, which was conventionally considered to be the most difficult task during manual repair work of sports equipment, can be removed. The metal The bearing part, which rotatably supports the rod on which the threaded cone is removably attached, can be removed extremely easily and quickly without causing any damage to the frame. Although both are mutually rotatable, due to the strength of the racket, even if both edges of the metal frame are pushed in the circumferential direction, the clamping claws formed at the tips of the supporting arms will not be obstructed by the edges. It is extremely useful because it allows the eyelet body to be removed smoothly and efficiently by adjusting and maintaining it in the optimum condition for easy removal without causing any tension, thereby significantly improving the efficiency of the stringing and replacing work. It has many practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of the device for extracting the eyelet body for inserting the gut of a badminton racket according to the present invention, and FIG. 1 is an overall perspective view of the badminton racket, and FIG. FIG. 3 is a side view of the same. In the diagram, 2... racket frame, 3...
・Gut insertion hole, 4... Eyelet body, 5...
... Gut, 7... Spiral cone, 8...
- Rod body, 9...Bearing portion, 14...Pinching arm, 16...Pinching claw.

Claims (1)

[Scope of utility model registration request] At one end of the rod, a threaded cone is removably screwed into the hollow part of the eyelet for string insertion fitted to the periphery of the racket frame, and at both ends of the bearing part that rotatably supports the rod. has a pair of clamping arms that can be opened and closed and loaded with bullets,
A clamping claw formed at the tip of the supporting arm is arranged to closely face the protruding base end of the screw-like cone, and the eyelet body for inserting the gut can be extracted by cooperation between the screw-shaped cone and the clamping arm. A device for extracting an eyelet body for inserting a badminton racket into a gut.