JP3226594U - Positioning structure of frame clamp for string machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning structure for a frame clamp of a string machine having high positioning reliability. A frame clamp positioning structure includes a rack 10, an engagement block 20, an operating member 30, and two springs 40. The rack is fitted to the platen 60, the housing 50 is formed in the column 50 of the frame clamp, the engaging block is movably installed in the housing, and the bottom edge of the engaging block is engaged with the rack. Teeth are formed. The operating member is pivotally mounted on the column, and mainly includes an operating portion 32 and a push portion 34 that is obliquely connected. The push portion extends inside the engagement block, and the push portion pushes the engagement block upward so that the meshing relationship between the engagement block and the rack is released. By engaging the engagement block and the rack, the frame clamp that holds the racket is effectively positioned in both directions. [Selection diagram] Figure 2

Description

The present invention relates to a frame clamp for holding a racket of a string machine, and more particularly to a positioning structure for a frame clamp of a string machine.

A racket having an annular frame, such as a tennis racket or a badminton racket, has a net-shaped ball striking surface formed by stretching an elastic string in the frame. The degree of tension of the ball striking face is determined by the numerical value of the tensile stress formed by pulling the string when the string is stretched to form the ball striking face. In order to make it easier to pull the strings and to make the tensile stress more accurate, the string machine is generally used to pull up the racket.

In the string machine, a plurality of frame clamps are erected on the upper edge of the platen, and an annular frame is fixedly held by each of the frame clamps, so that the racket is held so as to be firmly positioned during the string pulling process, The string is pulled up and pulled smoothly.

However, in the above-mentioned conventional technique, the size of the annular frame of the tennis racket and the badminton racket is different, and the string machine is used to pull up the string for the badminton racket and then the pulling work for the tennis racket. In this case, it was necessary to separate the frame clamps from each other in opposite directions so that the frame of the tennis racket was inserted between the frame clamps. On the contrary, when the string machine is used to pull up the tennis racket and then the badminton racket is pulled up, the frame clamps are brought close to each other, and the frame clamps effectively move the frame of the badminton racket. Had to stick to. Therefore, in the string machine, it is necessary that the relative distance between the frame clamps can be changed.

Further, in the conventional patent document, for example, there is a description of "positioning structure of frame clamp of string machine" in Patent Document 1 below. The frame clamp positioning structure of the string machine includes a rack, an engaging member, and an operating member. The rack is fitted on a platen of a string machine, and a plurality of one-way ratchets are arranged on the upper edge of the rack so as to be aligned. A frame clamp is mounted on the upper edge of the platen, and the engaging member is movably installed in the frame clamp. An oblique one-way engagement is formed by the bottom end of the engaging member and the ratchet gear of the rack. Accordingly, when the frame clamp is pushed in the outer peripheral direction of the platen, the engagement state between the engagement member and the ratchet gear is released even if the engagement member is not operated, and the engagement is performed. A member is sequentially fitted to each of the ratchet gears in one direction, and the movement of the frame clamp in the outer peripheral direction of the platen cannot be restricted. In the tensioning process, if the frame clamp is inadvertently contacted with the frame clamp in the outer peripheral direction, the frame clamp moves in the outer peripheral direction of the platen, and the frame clamp cannot be effectively held and released. , It sometimes hindered the pulling work.

Taiwan registered utility model No. M426421

Then, the present inventor thought that the above-mentioned drawbacks could be ameliorated, and as a result of intensive studies, the present inventor came to the proposal of the present invention which effectively ameliorate the above problems by rational design.

The present invention has been made in view of such circumstances, and an object thereof is to provide a positioning structure for a frame clamp of a string machine. That is, by engaging the engagement block with the rack, the frame clamp for firmly holding the racket is effectively positioned in both directions, and the positioning reliability of the frame clamp is enhanced.

In order to solve the above problems, a positioning structure for a frame clamp of a string machine according to an aspect of the present invention includes a rack, an engaging block, an operating member, and two springs. The column of the frame clamp is provided on the upper edge of the platen of the string machine, the rack is fitted on the platen, and a plurality of first convex teeth are provided on the upper edge of the rack. A storage portion is formed inside the column, a bottom edge of the storage portion is opened toward the rack, and an opening portion is formed on one side of the storage portion extending to the column. The engagement block is movably installed inside the housing portion, and a tooth portion formed by aligning a plurality of second convex teeth is formed on a bottom edge of the engagement block. The teeth are parallel to the rack, so that the engagement block is meshed with the rack by the teeth. A groove is provided on one side of the engagement block adjacent to the opening, and an abutment wall is formed on the upper edge of the groove. The operation member is pivotally mounted on the column, and the operation member mainly includes an operation portion and a push portion. A pivot is provided through the operation portion, and both ends of the pivot are attached to the column so that the operation member rotates about the pivot. One end of the push part is obliquely connected to the operation part, and the other end of the push part extends inside the groove part and is adjacent to the contact wall, whereby the push part connects the engaging block. When pushed upward, the meshing relationship between the engagement block and the rack is released. The spring is installed at the upper end of the engagement block, and both ends of the spring support the engagement block and the column, respectively, so that the spring meshes the engagement block with the rack.

The present invention has the following effects.
By engaging the engagement block and the rack, the frame clamp for firmly holding the racket is effectively positioned in both directions, and the positioning reliability of the frame clamp is enhanced.

FIG. 3 is a perspective view of a positioning structure for a frame clamp of a string machine according to an exemplary embodiment of the present invention. FIG. 3 is an exploded exploded view of the positioning structure of the frame clamp of the string machine according to the embodiment of the present invention. FIG. 3 is a partial cross-sectional view of a side surface of the positioning structure of the frame clamp of the string machine according to the embodiment of the present invention. FIG. 3 is a partial cross-sectional view of a side surface in an operating state according to an embodiment of the present invention.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. Needless to say, the present invention is not limited to the following examples, and can be arbitrarily changed without departing from the gist of the present invention.

A frame clamp positioning structure for a string machine according to an embodiment of the present invention includes a rack 10, an engagement block 20, an operation member 30, and two springs 40. The column 50 of the frame clamp is provided on the upper edge of the platen 60 of the string machine, and the rack 10 is fitted on the platen 60. A plurality of first convex teeth 12 are provided on the upper edge of the rack 10, a housing portion 52 is formed inside the column 50, and the housing portion 52 extends downward. A bottom edge of the accommodation portion 52 is opened toward the rack 10, and an opening 54 is formed on one side of the accommodation portion 52 extending to the column 50 (see FIGS. 1 to 4 ).

The engagement block 20 is movably installed inside the accommodating portion 52, and a tooth portion 22 formed by aligning a plurality of second convex teeth 21 is formed on a bottom edge of the engagement block 20. There is. The teeth 22 are parallel to the rack 10, so that the engagement block 20 is engaged with the rack 10 by the teeth 22. A groove 23 is recessed on one side of the engagement block 20 adjacent to the opening 54, and an abutment wall 24 is formed on an upper edge of the groove 23. The operation member 30 is pivotally mounted on the column 50, and the operation member 30 mainly includes an operation portion 32 and a push portion 34. A pivot 36 is provided through the operation portion 30, and both ends of the pivot 36 are attached to the column 50, whereby the operation member 30 rotates about the pivot 36. One end of the push part 34 is obliquely connected to the operation part 32, and a part of the operation part 32 passes through the opening part 54 and is projected to the outside of the accommodating part 52. is there. The other end of the push portion 34 extends inside the groove 23 and is adjacent to the contact wall 24, whereby the push portion 34 pushes the engaging block 20 upward, and The meshing relationship between the mating block 20 and the rack 10 is released. The spring 40 is installed at the upper end of the engagement block 20, and both ends of the spring 40 support the engagement block 20 and the column 50, respectively, so that the spring 40 causes the engagement block 20 and the rack 10 to operate. Is meshed with.

In the above-described embodiment, when the column 50 is positioned on the platen 60, the spring 40 exerts an acting force on the engagement block 20, the engagement block 20 moves downward, and The engagement block 20 is meshed with the rack 10. At this time, the first convex teeth 12 corresponding to the respective second convex teeth 21 are locked in the longitudinal direction of the rack 10, and the external force acting on the lateral side of the column 50 is the platen 60. The column 50 cannot be pushed to move along the upper edge of

When the column 50 is pushed according to the purpose of adjusting the frame clamp, when the operating portion 32 is pushed toward the housing portion 52 and the operating member 30 is rotated counterclockwise, the pushing portion 34 is pushed. Is formed to abut against the abutment wall 24, the engaging block 20 is abutted and moves upward (see FIG. 4), and the engaging block 20 is separated from the rack 10. Then, the meshing relationship between the engagement block 20 and the rack 10 is released. This allows the column 50 to be pushed so as to move along the upper edge of the platen 60.

As described above, according to the present invention, by engaging the engaging block 20 with the rack 10, the frame clamp for holding the racket is effectively positioned in both directions, and the reliability of the positioning of the frame clamp is improved. Will increase.

In addition, the push unit 34 includes two arm levers 342 and a wheel 344. The side surfaces of the arm levers 342 are opposed to each other, one end of each arm lever 342 is obliquely connected to the operation portion 32, and one end of each arm lever 342 extends toward the upper edge direction of the groove portion 23. Has been done. The wheel 344 is installed between the arm levers 342, and a shaft 346 is pivotally attached to the wheel 344 in the axial direction. The shaft 346 is attached to each arm lever 342 so that the wheel 344 is abutted so as to move the engagement block 20 upward.

When the push portion 34 is abutted upwards on the engagement block 20, the wheel 344 rotationally contacts the abutment wall 24, thereby causing a gap between the wheel 344 and the abutment wall 24. Friction is reduced. When the column 50 is moved until it is positioned and the control applied to the operating portion 32 is released, the elastic force of the spring 40 and the gravity of the engaging block 20 cause the engaging block 20 to move. When the push block 34 moves downward and the wheel 344 makes contact with the contact wall 24, the contact wall 24 and the push block 34 are prevented from hitting each other. The reliability that the engagement relationship between the engagement block 20 and the rack 10 is restored by moving to the position is increased.

A slot 25 extends laterally through the engaging block 20, and both ends of the slot 25 extending in the longitudinal direction are directed toward the upper portion of the engaging block 20 and the rack 10. A position limiting rod 26 is pivotally inserted into the slot 25, and both ends of the position limiting rod 26 are attached to the columns 50, respectively. As a result, the position limiting rod 26 limits the movement stroke of the engagement block 20 that moves up and down.

Two first fitting holes 27 are recessed downward at the upper end of the engagement block 20, and two second fitting holes 56 are recessed upward at the upper end of the accommodating portion 52 of the column 50. Both ends of each spring 40 are respectively passed through the first fitting hole 27 and the second fitting hole 56. As a result, each spring 40 is positioned.

The above-described embodiments are described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above-described embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments, but is to be construed in the broadest scope according to the technical idea defined by the claims for utility model registration.

10 rack 12 1st convex tooth 20 engaging block 21 2nd convex tooth 22 tooth part 23 groove part 24 contact wall 25 slot 26 position limiting rod 27 first fitting hole 30 operation member 32 operation part 34 push part 342 arm lever 344 wheel 346 Shaft 36 Pivot 40 Spring 50 Column 52 Housing 54 Opening 56 Second Fitting Hole 60 Platen

Claims (5)

A positioning structure for a frame clamp of a string machine, comprising: a rack, an engagement block, an operating member, and two springs, wherein a column of the frame clamp is provided on an upper edge of a platen of the string machine, The rack is fitted on the platen, and a plurality of first convex teeth are provided on the upper edge of the rack so as to project.
A storage portion is formed inside the column, a bottom edge of the storage portion is opened toward the rack, and an opening is formed on one side of the storage portion that extends to the column.
The engagement block is movably installed inside the accommodating portion, and a tooth portion formed by aligning a plurality of second convex teeth is formed on a bottom edge of the engagement block, and the tooth portion is the In parallel with the rack, the engaging block is meshed with the rack by the tooth portion, and a groove is provided on one side of the engaging block close to the opening, and an upper edge of the groove is formed. A contact wall is formed on the
The operating member is pivotally mounted on the column, the operating member is mainly composed of an operating portion and a push portion, a pivot is provided through the operating portion, and both ends of the pivot are attached to the column. Causes the operating member to rotate about the pivot, one end of the push portion is obliquely connected to the operating portion, and the other end of the push portion extends into the groove portion and is adjacent to the contact wall. As a result, the push portion pushes the engagement block upward, and the meshing relationship between the engagement block and the rack is released.
The spring is installed at an upper end of the engagement block, and both ends of the spring support the engagement block and the column, respectively, whereby the spring engages the engagement block and the rack. Positioning structure for frame clamp of string machine. The push part is composed of two arm levers and a wheel. The side faces of the arm levers face each other, one end of each arm lever is obliquely connected to the operation part, and one end of each arm lever is Extending toward the upper edge of the groove, the wheel is provided between the arm levers, a shaft is pivotally attached to the wheel in the axial direction, and the shaft is attached to the arm levers. The frame clamp positioning structure for a string machine according to claim 1, wherein the wheel pushes the engagement block so as to move the engagement block upward. A slot extends laterally through the engaging block, and both ends of the slot extending in the longitudinal direction point toward the upper portion of the engaging block and the rack, respectively, and a position limiting rod can be pivoted in the slot. 3. The insertion device is provided, and both ends of the position limiting rod are respectively attached to the columns, thereby limiting a moving stroke of the position limiting rod moving up and down the engaging block. Positioning structure for the frame clamp of the string machine described in. The positioning structure for a frame clamp of a string machine according to claim 1, wherein a part of the operation unit is passed through the opening and protrudes to the outside of the accommodation unit. Two first fitting holes are recessed downward at the upper end of the engagement block, and two second fitting holes are recessed upward at the upper end of the accommodating portion of the column. 3. A frame clamp positioning structure for a string machine according to claim 1, wherein both ends of the spring are positioned by the first fitting hole and the second fitting hole, respectively, and thereby the springs are positioned. ..