JPH114917A - Adapter for frame holder and string setting-up machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily detachable adapter for a frame holder which can deal with frames of various cross sections and prevent a stress from being applied to a single point as well as a string setting-up machine. SOLUTION: The adapter 10 for a frame holder is used for the frame holder, of a string setting-up machine, which is equipped with a pair of inner face support members for internally supporting two points, in the longitudinal direction, opposed mutually, in the frame part of a racket. Further, the adapter 10 is interposed between the inner face support members and the inner face of the frame part, with a contact part 4 which comes into contact with the inner face of the frame part and forms a V-shaped groove 5. In addition, the adapter 10 is equipped with a support means for retaining itself on the inner face support member of the frame holder. The support means is of such a structure that plural pass grooves 7 through which a gut set up on the frame part of the racket passes are formed by one of tapered parts 8 constituting the V-shaped groove 5 and the deepest part 9 of the tapered part 8 in such a manner that the pass grooves 7 are notched out across a length from the contact part 4 side to its back face side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gut stretching machine used for stretching a tennis racket or a badminton racket, and an adapter for a frame holder attached to the gut stretching machine.

[0002]

2. Description of the Related Art In the field of gut stretching machines, there has conventionally been a mainstream equipped with a frame holder for holding two opposing points which are most separated from each other by a linear distance inside a frame. One that has a pulling unit for tensioning the gut while automatically managing it (hereinafter referred to as stringing), or a gut that extends along the longitudinal direction of the racket (hereinafter referred to as a warp and perpendicular to this) In some cases, a side support arm is provided to suppress the deformation of the frame due to the tension of the gut to be stretched (referred to as a weft). The frame holder is generally of a form in which an inner surface support member is hooked and held inside a frame portion, but the inner surface support member is formed in consideration of removal when a gut is finished. It is limited to a size that can be inserted into the square formed by the gut attached to the.

[0003]

However, today,
In order to produce powerful hit balls, material improvements such as the use of graphite have been actively carried out, and the rigidity and high elasticity of the frame have advanced, and on the user side, the high tension preference of how to put gut has increased In a conventional frame holder that simply hooks the inside of the frame with the inner surface supporting member when holding the frame, the stress due to the tension of the gut stretched is strongly supported by the inner surface supporting member. There are many instances where the frame is concentrated at two points facing each other and the frame is damaged before the gut is finished.

The present invention has been made in view of the above circumstances, and it is easy to remove a racket after stringing, can cope with various cross-sectional shapes of a frame, and can prevent concentration of stress at one point. An object is to provide an adapter for a frame holder and a gut stretching machine.

[0005]

An adapter for a frame holder according to the present invention, which has been made to solve the above problems, comprises:
It is used for a frame holder of a gut stretching machine having a pair of inner surface support members that support two opposing longitudinal points of a frame portion constituting a striking surface of a racket from the inside, and is supported by the inner surface support member and the inner surface support member. An adapter interposed between the inner surface of the frame portion and a V-shaped groove in which a contact portion in contact with the inner surface of the frame has a V-shaped groove;
One of a plurality of cutout grooves through which the gut stretched on the frame portion of the racket passes, and one tapered portion constituting the V-shaped groove and the deepest portion thereof are cut out from the contact portion side to the back surface side. It is characterized in that a supporting means formed in a state and held by an inner surface supporting member of the frame holder is provided.

It is possible to prepare a plurality of adapters by mixing linear or curved adapters in accordance with the shape of the frame portion of the racket, but the frame portion of the racket has a linear shape. The adapter is elastically deformed and has an appropriate reinforcing effect in order to properly cope with such deformation, regardless of whether the adapter is curved or curved. Is desirable. Since the adapter is required to be deformed while suppressing the deformation of the frame portion, the critical point of the force at which the adapter is warped is set substantially equal to the force at which the racket is deformed. From the viewpoint of the adaptation, the elastic strength of the adapter should be the recommended string tension of a general racket (45 to 60 pounds for tennis, 20 to 25 pounds for badminton) and the support at the frame. The extent to which the warp imitates the inner surface of the surface is a guide.

As the material, it is desirable to select the material having elasticity (regardless of synthetic resin, wood, and metal), and if possible, a material that does not damage the racket.
If a cork, a leather, a soft synthetic resin, or the like is adhered to the contact portion, a hard material may be used.

The length of the adapter may be set longer depending on the material. However, even if the length of the adapter is longer than necessary, the deformation of the adapter following the inner surface of the frame portion of the racket may cause the groove to be removed. Since a large change occurs in the direction, it is necessary to set the width to be wide so as not to hinder the passage of the gut having the shape of the cutout groove existing at both ends of the adapter. Also, by doing so, not only does the strength of the contact portions at both ends of the adapter decrease,
Since the contact area between the abutment part at both ends of the adapter and the inner surface of the racket frame part is reduced, it is not possible to expect an effect worth the lengthening of the adapter. It is considered that the length (length of about 5 pitches) at which four holes to be formed can be provided would be optimal.

In the gut stretching machine according to the present invention, it is sufficient that the gut stretching machine has a structure capable of supporting the adapter so as to be detachable from the hooking portion of the inner surface support member. It may be a structure that fits into a groove provided on the back surface of the contact portion, or a structure in which a connecting portion protrudes from the back side of the contact portion in the adapter, and the inner surface supporting member is inserted into the connecting portion. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a frame holder adapter and a gut stretching machine according to the present invention will be described together. FIG. 3 shows a gut stretcher that is very commonly used today. The gut stretching machine includes a pulling unit 11, a rotary table 13 on which a frame holder 3 and a clamp unit 12 are mounted, supports the rotary table 13, and moves the pulling unit 11 horizontally with respect to the rotary table 13. The base 14 is mounted so as to be able to advance and retreat.

The pulling unit 11 includes a bobbin 15 around which the gut 6 is wound, a holding portion 16 for holding the rest of the gut 6 wound around the bobbin 15, and a movement of the pulling unit 11 to increase or decrease the tension of the gut 6. The frame holder 3 is composed of a start button 17 for starting operation, and the frame holder 3 comprises two opposing longitudinal points (hereinafter referred to as support portions 18, 1) of the frame portion 1 constituting the hitting surface of the racket.
8) are supported from the inside by a pair of inner surface support members 2,
2 and a pair of side support members 19 supporting the both sides of the frame portion 1 from the sides with the support portions 18 and 18 as a pair.
0 and 20, respectively, and two kinds of knobs 21 and 21 attached to the columns 20 and 20 separate the distance between the columns 20 and 20 and the hooking portions of the inner surface supporting members 2 and support the columns 20 and 20 respectively. The opening angle of the side support member 19 is adjusted. The clamp unit 12 is provided with the rotary table 1.
In the sub-table 22 that rotates further at the center of 3,
A pair of clamp arms 25, each of which is rotatably mounted on an upper end of an L-shaped pedestal 24, is rotatably mounted on a clamp portion 23 for clamping an end of the gut 6 stretched on the frame portion 1.

In this embodiment, an adapter 10 made of synthetic resin is attached to the tip of the pair of inner surface support members 2 and 2 so as to face the outside of the turntable 13, and a racket frame is inserted through the adapter 10. Supports part 1.

The adapter 10 is formed of an elastomer material having a soft touch and non-slip, and has a V-block shape in which a contact portion 4 in contact with the inner surface of the frame portion 1 has a V-shaped groove 5 and is attached to a racket. Gut 6 and adapter 1
In order to avoid a collision with the racket 0, four rows of cutout grooves 7 through which the gut 6 stretched on the racket frame portion 1 passes are provided with one tapered portion 8 of the V-shaped groove 5 and the deepest portion 9 thereof. Are formed so as to be cut out from the contact portion 4 side to the back surface side thereof, and a groove 26 in which the inner surface support member 2 is fitted is used as a support means for being held by the inner surface support member 2 of the frame holder 3. It is provided. As a result of the perforation groove 7 being drilled as described above, a portion that is scattered across the perforation groove 7 as a part of the contact portion 4 can be detached from between the guts 6 stretched on the frame portion 1. It becomes toothy.

Stringing by the gut stretching machine configured as described above is performed while the racket is held by the inner surface support member 2 and the side surface support member 19 as shown in FIG. When mounting the frame portion 1 of the racket on the frame holder 3, first, the inner surface support members 2, 2 are brought into contact with the inner surfaces of the two support portions 18, 18 via the adapters 10, 10, respectively. By operating the knobs for the support member 2 respectively, the support 1 in the frame 1 of the racket
8, 18 are drawn horizontally in opposite directions. By this operation, the adapter 10 sandwiched between the frame portion 1 and each inner surface support member 2 not only elastically warps following the inner surface of the frame portion 1 as shown in FIGS. The upper and lower edges 27, 27 of the contact portion 4 of the adapter 10 are warped according to the curved surface formed by the cross-sectional shape inside the frame portion 1 as shown in FIG.

The adapter 10 is of course a linear frame portion, and even the curved frame portion 1 as shown in FIG. Make reliable contact. Further, as shown in FIG. 6, the inner surface of the frame portion 1 reliably contacts at least the upper and lower curved surfaces formed by the inner surface of the frame portion 1 irrespective of the cross-sectional shape.

The stringing of the gut 6 usually starts from the warp connecting the supporting portions 18 and 18 and is stretched one by one right and left alternately. The end of the stretched gut 6 is individually fixed by the clamp arm 25 each time the gut 6 is passed in a line, and the fixed gut 6 is fixed to the pulling unit 1.
1, a constant tension is uniformly applied to each row. The tension is set in accordance with an input from the touch panel 28, and the operation of the start button 17 causes the base 6 to tension the gut 6 newly passed through the through hole 30 of the frame portion 1 for each row to the set tension. The vehicle travels in a sliding groove 29 provided in the motor 14.

Before the weft is tensioned, a strong tension acts on the frame 1 in the longitudinal direction of the racket. As a result, the warp acts to crush the frame 1 in the longitudinal direction, and conversely, the width of the warp acts on the width. In the direction, a force acts to expand the frame portion 1. The inner surface support member 2 opposes the crushing force and the side surface support member 19 opposes the force for expanding. However, such a stress may cause the frame portion 1 to be damaged before the weft is tensioned. Many cases occurred. However, in this example, since the adapter 10 having a length of four or more pitches of the warp is attached to the inner surface supporting member 2, the stress caused by the tension of the warp is dispersed and received over the entire length, and Since the support 18 of the frame 1 is also reinforced by the adapter 10, damage to the frame 1 until the weft is stretched is substantially avoided. As described above, even though the adapter 10 can hold the inner surface of the frame portion 1 over a long range, when the gut 6 has been stretched, the upper portion or the lower portion of the contact portion 4 as described above. One of which has a comb shape,
It can be easily removed from the frame part 1.

[0018]

As described above, by using the frame holder adapter and the gut stretching machine according to the present invention, even if the gut is stretched with a high tension corresponding to the upper limit of the recommended tension, the frame portion of the racket at the time of stringing can be obtained. Breakage can be prevented, and with the use of the adapter according to the second aspect, safer and more reliable stringing can be performed by appropriate deformation and appropriate elastic strength. As a result, stringing can be performed while balancing the delicate tension on the racket of senior players such as top pros, and even when stringing against beginners and average players, the skill of the player can be improved. The corresponding stringing can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a frame holder adapter according to the present invention.

FIG. 2 is a front view of the adapter shown in FIG.

FIG. 3 is a perspective view showing an example of a gut stretching machine according to the present invention.

FIG. 4 is an explanatory view showing a support state of a frame portion in the frame holder of FIG. 3;

FIGS. 5A and 5B are explanatory views showing a state in which the frame portion is supported by the inner surface support member in a plan view.

6 (a), (b) and (c) are cross-sectional views illustrating a state in which the frame portion is supported by the inner surface support member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame part 2 Inner surface support member 3 Frame holder 4 Contact part 5 Groove 6 Gut 7 Draft groove 8 Taper part 9 Deepest part 10 Adapter

Claims (3)

[Claims] 1. A frame holder for a gut stretching machine, comprising a pair of inner surface support members (2, 2) for supporting, from inside, two opposing longitudinal points of a frame portion (1) constituting a striking surface of a racket. (3) an adapter interposed between the inner surface support member (2, 2) and the inner surface of the frame portion (1) supported by the inner surface support member, the abutment being in contact with the inner surface of the frame portion (1). The portion (4) has a V-shaped groove (5)
The V-shaped groove (5) is formed by a plurality of cutout grooves (7) each having a V-block shape and through which a gut (6) stretched on the frame portion (1) of the racket passes. The tapered portion (8) and the deepest portion (9) of the frame holder (3) are formed so as to be cut out from the contact portion (4) side to the back surface side, and the inner surface support members (2, 2) of the frame holder (3). An adapter for a frame holder provided with support means for being held by the frame holder. 2. The frame holder adapter according to claim 1, wherein when supporting the frame portion of the racket, the frame holder is formed of a material which can be elastically deformed in accordance with the shape of the frame portion. 3. A frame holder (3) having a pair of inner surface support members (2, 2) for supporting two opposing longitudinal points of a frame portion (1) constituting a striking surface of a racket from inside. A gut stretching machine having a frame holder adapter (10) according to claim 1 or 2 attached to an inner surface support member (2, 2) of said frame holder (3).