JP7262160B2 - Turntable horizontal rotation position fixing mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal rotation position fixing mechanism for a turntable in a stringing machine such as a tennis racket.

A string tensioning machine for rackets such as tennis, badminton, squash, and racquetball includes a turntable that supports a racket fixing base and a string clamping mechanism, a tension unit that pulls the strings with a predetermined pressure, and the turntable and the tension unit. and a stand for supporting the work table.

FIG. 1 shows the string tensioning machine, wherein reference numeral 1 is a string tensioning machine, 2 and 2 are racket fixing bases, 3 and 3 are string clamping mechanisms, 4 is a turntable, 5 is a tension unit, and 6 is a work table. is. Note that the stand is omitted from the drawing.

When stringing a racket with such a string tensioning machine, the orientation of the frame of the racket fixed to the racket fixing bases 2, 2 must be changed frequently. This is done by rotating the turntable 4 supporting the racket fixing bases 2, 2 in the horizontal direction. Then, the turntable 4 must be fixed to the horizontal rotational position required for the work each time.

In addition, it is necessary to fix the horizontal rotation of the turntable 4 at a desired position as described above, maintain that state during work, and quickly release the fixation when moving to the next work. . In this way, in the work of stringing the string on the racket, the rotation of the turntable is repeatedly fixed, continued, and released. was desired.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and is capable of quickly and reliably fixing the horizontal rotation of the turntable at a desired position, and of maintaining the fixed state during operation. When one work is completed and the position of the turntable is changed to move to the next work, the fixation can be quickly released, thereby greatly improving the efficiency of the string tensioning work. It is an object of the present invention to provide such a turntable horizontal rotation position fixing mechanism.

Thus, the gist of the present invention consists of an annular steel plate of the required diameter attached to the underside of a turntable support plate fixed perpendicular to the vertical axis of rotation, and a steel plate fixed to the upper surface of the worktable. an electromagnet holding plate having a row of recesses for slidably fitting electromagnets along the axis of the annular iron plate on its upper surface; A horizontal rotation position fixing mechanism for a turntable in a string tensioning machine for a tennis racket or the like, characterized by comprising an electromagnet that slightly protrudes from the recess and is attracted to the annular iron plate when the turntable is pressed.

The present invention is configured as described above, and by utilizing the characteristics of the electromagnet, the horizontal rotation of the turntable can be quickly and reliably fixed at a desired position, and the fixed state can be maintained during operation. When one work is finished and the position of the turntable is changed in order to move to the next work, the fixation can be released quickly, so the efficiency of the string tensioning work is greatly improved. It is something that can be improved.

That is, when the electromagnet is energized and excited, the electromagnet slightly rises and protrudes from a recess provided in the electromagnet holding plate fixed to the worktable, and is attracted to the annular iron plate attached to the turntable support plate. be. Since the electromagnet attracted to the annular iron plate is fitted in the concave portion of the electromagnet holding plate and is not displaced in the horizontal direction, the turntable is fixed at that position. As a result, the turntable is quickly and reliably fixed to the desired horizontal rotational position. When stringing the racket while the turntable is at that position, it is sufficient to continue to energize the electromagnet, and after the work is completed, the position of the turntable is changed to change the orientation of the racket. In some cases, it is sufficient to de-energize the electromagnet, which quickly releases the fixation.

In addition, since it has such an effect, for example, if the electromagnet is energized by using a foot pedal type switch, the horizontal rotation position of the turntable can be fixed simply by operating the switch. , continuation, and cancellation can be performed quickly, and both hands can be used freely, so that the work can be performed more efficiently.

1 is a perspective view of a string tensioning machine for a tennis racket or the like embodying the present invention; FIG. FIG. 4 is an explanatory diagram of a main part of a turntable horizontal rotation position fixing mechanism according to the embodiment of the present invention; FIG. 4 is an explanatory diagram of the same action; 4 is a plan view of an electromagnet holding plate; FIG. 5 is an enlarged cross-sectional view taken along the line AA in FIG. 4; FIG. It is a bottom view of an electromagnet holding plate.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated with reference to drawings.

In the figure, reference numeral 1 denotes a string tensioning machine comprising a turntable 4 for supporting racket fixing bases 2, 2 and string clamping mechanisms 3, 3; and a tension unit 5 are set thereon, and a stand (not shown) for supporting the work table 6 .

Thus, the present invention relates to a horizontal rotation position fixing mechanism 7 for the turntable 4 in the string tensioning machine.

The turntable horizontal rotation position fixing mechanism 7 comprises an annular iron plate 10 of a required diameter attached to the lower surface of a turntable support plate 9 fixed perpendicularly to a vertical rotation shaft 8, and a worktable 6. and an electromagnet holding plate 12 having recesses 11, 11, 11, . . . of the electromagnet holding plate 12 so as to be retractable, and when excited, it slightly protrudes from the recesses 11, 11, 11 . It consists of electromagnets 13, 13, 13, and so on.

General-purpose electromagnets are used as the electromagnets 13, 13, 13 .

Next, the operation of this embodiment will be described.
When the electromagnets 13, 13, 13 . . . are energized and excited, the electromagnets 13, 13, 13 . , and sticks to an annular iron plate 10 attached to a turntable support plate 9. As shown in FIG. The electromagnets 13, 13, 13, . The table 4 is to be fixed in that position. As a result, the turntable 4 is quickly and reliably fixed to the desired horizontal rotational position. When stringing the racket while the turntable 4 is at that position, the electromagnets 13, 13, 13, . . . When changing the position of the turntable 4 in order to change its direction, it suffices to stop the energization of the electromagnets 13, 13, 13, .

As described above, this embodiment utilizes the characteristics of the electromagnet to quickly and reliably fix the horizontal rotation of the turntable 4 at a desired position, and to maintain the fixed state during operation. When one work is completed and the position of the turntable 4 is changed in order to move to the next work, the fixation can be quickly released. Efficiency can be improved.

Further, since it has the above effects, for example, if a foot pedal type switch (not shown) is used to energize the electromagnets 13, 13, 13, . The horizontal rotation position of the turntable 4 can be fixed, continued, and released only by operating a switch, which can be done quickly and both hands can be used freely, so that the work can be performed more efficiently. It will be possible to

1 string tensioner 2, 2 racket fixing bases 3, 3 string clamping mechanism 4 turntable 5 tension unit 6 worktable 7 turntable horizontal rotation position fixing mechanism 8 rotation shaft 9 turntable support plate 10 annular iron plate 11 recess 12 Electromagnet holding plate 13 Electromagnet

Claims (1)

A turntable horizontal rotation position fixing mechanism for fixing the rotation position of a turntable that rotates in the horizontal direction in a stringing machine such as a tennis racket,
The turntable comprises a turntable support plate set on the upper part of the worktable ,
an annular iron plate attached to the lower surface of the turntable support plate;
an electromagnet holding plate fixed to the upper surface of the work table;
a plurality of electromagnets held by the electromagnet holding plate,
The electromagnet holding plate has a plurality of recesses arranged in a row on the upper surface thereof, and the plurality of recesses into which the plurality of electromagnets are fitted so as to be retractable,
A turntable horizontal rotation position fixing mechanism , wherein the electromagnet projects from the recess and is attracted to the annular iron plate when excited, thereby fixing the rotation position of the turntable .

Images