JPH0243402Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application The present invention is designed to fit loosely into a string insertion hole formed through the tip surface of a cylindrical grip or the cap surface of a cap that is screwed onto the tip of a cylindrical grip. This invention relates to an improvement of a string stopper in a rope jumper.

B. Prior Art Conventionally, there are various types of string fasteners for rope jumping equipment, but a typical one, as described in Japanese Utility Model Application Publication No. 56-168170, has a grip at the base end of the grip. A communication hole with a taper and an internal thread is bored inside either the part or the tightening part, and a muscle splitting part and an external thread are formed at the tip of either of them, and both are screwed together. , or as described in Utility Model Publication No. 48-33269,
a rotary terminal that loosely fits into the grip body and has a tapered through hole whose diameter decreases toward the tip of the body;
There was one that had a truncated conical shape with the same taper as that, and a tightening element that had a string insertion hole passed through the center and a cut groove on its surface, and was housed in the grip main body.

C. Problems to be Solved by the Invention In the above-mentioned conventional string stopper for rope jumping equipment, the former has a tightening portion screwed into the grip at the base end of the grip to support and fix the string. , due to the rotation of the string outside the grip, the base of the string that touches the tip of the grip is severely damaged;
The rotation of the rope is directly transmitted to the hand, making it uncomfortable to use and increasing hand fatigue.Furthermore, the base of the rope, which is exposed to the outside, is not reinforced to smooth the bends, so the base of the rope is There was an inconvenience that wear and deterioration occurred quickly.

In addition, with the latter, the string is supported and fixed at the tip of the grip body, and the rotating terminal is loosely fitted into the grip body, so depending on the degree of twisting of the string base due to the rotation of the string, the rotating terminal may be attached to the string along with the string. rotates to ease the twisting of the string, but since there is nothing to support the bending of the string at the base of the string exposed to the outside from the end of the rotating terminal, the string is used with the string suddenly bent from the base. This resulted in the inconvenience that the base of the string wore out and deteriorated quickly.

D. Means for Solving the Problems In view of the above-mentioned problems with the string stopper in the conventional jump rope equipment, the present invention has a simple and rational structure that allows for easy expansion and contraction adjustment of the string, and allows for easy adjustment of the string by rotation of the string. To provide a string stopper that alleviates twisting at the base of the string, reinforces the base of the string, smooths its bending, and prevents wear and deterioration of the base of the string.It is composed of a tubular grip. A string stopper that loosely fits into a string insertion hole penetrated through the cap surface of a cap that is screwed onto the tip end surface of a cap or the tip end of a cylindrical grip, and which has a threaded groove cut into its inner circumferential surface. and a small-diameter cylindrical opening part that can be inserted into the string insertion hole and has a bellows-shaped protrusion on the outer periphery, at the tip of the large-diameter cylindrical part that can be loosely fitted onto the inner peripheral surface of the cylindrical grip tip. an outer cylinder for securing a string, further comprising a tapered surface that gradually becomes smaller in diameter toward the small-diameter cylindrical part at the tip of the thread groove on the inner periphery of the large-diameter cylindrical part; The inner tube is screwed into the outer tube and has a plurality of flexible hook-like portions protruding from the tip of the threaded portion inside. Inserting the end of the string to be inserted through the small-diameter cylindrical opening into the outer tube for string fixing, and in this state, screwing the inner tube for string fixing onto the outer tube to stop the tip of the string. It is in.

E. Action First, pass the string through the string insertion hole, then pass the string through the opening of the small-diameter cylindrical opening of the outer tube for string fixing (hereinafter referred to as the outer tube) to the large-diameter cylindrical portion, and then fasten the string. Insert into the inner cylinder (hereinafter referred to as the inner cylinder) from the hook-shaped side. Then, with this string inserted through it, it is made to an appropriate length, and the inner cylinder is inserted from the hook-shaped part into the thread groove on the inner periphery of the large-diameter cylindrical part of the outer cylinder, and the two are screwed together. Then, the hook-shaped part of the inner cylinder comes into contact with the tapered surface at the tip of the thread groove of the large-diameter cylindrical part of the outer cylinder, and as the screwing progresses, the hook-shaped part moves inward along the tapered surface. The string that is bent and inserted into the cylindrical portion is gripped from the outside, so that the string cannot be pulled out.

Screw the inner cylinder into the outer cylinder as described above, and pull the string held by the hook-shaped part from the string insertion hole side until the cylindrical opening part protrudes from the string insertion hole. This completes the assembly of the tensioned string to the cylindrical grip (hereinafter referred to as the grip).

Incidentally, the other grip is assembled while adjusting the dimensions in the same manner as described above.

The outer cylinder and the inner cylinder rotate in conjunction with the twisting direction of the string to alleviate the twisting of the string, and the small diameter cylindrical opening part with a bellows-like protrusion on the outer circumferential surface allows the string to move. It bends in conjunction with the direction of the string, smoothing the bending of the string and preventing wear and tear at its base.

Example Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a cross-sectional view showing the assembled state of the grip, outer tube, and inner tube, and FIG. 2 is a cross-sectional view of the grip after the grip is assembled.

In the figure, 1 is a grip, 11 is a string insertion hole, 2 is an outer cylinder, 21 is a small diameter cylindrical opening, 22 is a tapered surface, 23 is a large diameter cylindrical part, 3 is an inner cylinder, and 31 is a hook shape. Section 4 is a string.

The grip 1 is made of plastic and has a hollow cylindrical shape with a slight bulge in the middle, and has a string insertion hole 11 having a smaller diameter than the inner diameter of the end at the distal end 1a, while the proximal end 1b has an inner diameter. It is open so that the outer cylinder can be inserted. Note that a bottom plate (not shown) may be detachably attached to this open end.

The outer cylinder 2 is integrally formed with a small diameter cylindrical opening part 21 having a bellows-like protrusion on the outer peripheral surface at the tip of a large diameter cylindrical part 23 having a threaded groove carved on the inner peripheral surface. However, at the tip of the thread groove on the inner periphery of the large-diameter cylindrical portion 23, a tapered surface 22 is formed that gradually becomes smaller in diameter toward the small-diameter cylindrical opening portion 21.

The inner tube 3 has a plurality (usually 3 to 5) of flexible hook-shaped portions 31 with the tips facing inward at the tip of the threaded portion that screws into the outer tube 2 .

To assemble these members, first insert the end of the string 4 inserted into the string insertion hole 11 into the outer cylinder 2 through the small diameter cylindrical opening 21, and then insert it into the inner cylinder 3 from the hook-shaped part 31 side. After inserting the outer cylinder 2 and adjusting the length by appropriately moving the position of the outer cylinder 2 along the string 4, insert the inner cylinder 3.
is screwed onto the outer cylinder 2. When the inner cylinder 3 is further screwed together in this state, the plurality of flexible hook-shaped portions 31 protruding from the tip of the inner cylinder 3 are connected to the outer cylinder 2.
It flexes inward along the inner tapered surface 22 and eventually comes to grip the string 4. The outer cylinder 2 and inner cylinder 3 integrated in this way are held in the grip 1.
The small-diameter cylindrical opening part 21 having the bellows-like protrusion of the outer cylinder 2 protrudes outward from the string insertion hole 11 of the grip 1. Pull the outer tube 2 until it is inserted into the string insertion hole 11.
It fits loosely into the (See Fig. 2) The string 4 connected to the grip 1 in this state is firmly connected so that it cannot be inserted or removed, and there is no fear that it will come off.

The length adjustment of the string 4 is determined by the positional relationship between the outer tubes 2 and 4 as described above, but if you want to adjust the length of the string 4 during use, you can This can be done by unscrewing the screws.

When the string stopper in the jump rope device configured in this way is used, the outer cylinder 2 and the inner cylinder 3 rotate in conjunction with the twisting direction of the string 4, and the twisting of the string 4 is relaxed and the outer circumferential surface is The small-diameter cylindrical opening part 21 provided with a bellows-like protrusion makes it difficult for the outer cylinder 2 to come out of the string insertion hole 11, and also bends in conjunction with the direction in which the string moves, smoothing out the bending of the string. This has the advantage of not only preventing wear and deterioration of the root portion but also improving the usability as a whole.

The materials of the grip 1, the outer cylinder 2, and the inner cylinder 3 are not limited in any way, but if they are made of plastic, they will have good durability and the outer cylinder 2 and the inner cylinder in the string insertion hole 11 and the grip 1 will be made of plastic. The cylinder 3 can be rotated more smoothly.

In addition, the string stopper of the present invention can be used for jumping ropes with all kinds of strings, such as cotton ropes and plastic ropes such as vinyl ropes, and the thickness of the string can also be changed by the action of the hook-shaped part. It can be used for any thickness within this range.

FIG. 3 shows a modified embodiment of the invention, with grip 1
This figure shows an embodiment in which a rope stopper according to the present invention is attached to a rope jumper of the type that has a cylindrical protrusion 12 protruding from the tip thereof and a cap 5 screwed onto the cylindrical protrusion 12. In the cross-sectional view, the same reference numerals as in the first embodiment indicate the same members.

In this embodiment, a string insertion hole 11 is provided through the cap surface 5a of the cap 5, and the outer cylinder 2 is loosely fitted into the string insertion hole 11.
Similarly to the above, the inner tube 3 and the outer tube 2, which are formed by holding the string 4, are inserted into the grip 1 from the cylindrical protrusion 12 side through the cap 5, and then the cap 5 is inserted. The small diameter cylindrical opening part 21 is loosely fitted into the string insertion hole 11 by screwing it into the cylindrical protrusion 12 and pulling the string 4. According to the above configuration, in addition to the same effect as in the first embodiment, cracks are not generated due to the rotation or twisting of the outer cylinder 2 and the inner cylinder 3, which rotate in conjunction with the rotation of the string 4. The upper end of the grip 1, which is easy to grip, is protected by the cap 5, which has the effect of increasing the durability of the grip 1.

G. Effect of the invention As explained above, the string stopper in the rope jumping device according to the invention has a flexible hook shape by inserting the string into the outer tube and the inner tube, and screwing the outer tube and the inner tube together. The structure is such that the string is held and fixed at the end, so the string never slips out of the string stopper, and it is extremely easy to adjust so that it can be used at the optimal length according to the user's physique. It is also safer than jump rope equipment that uses metal fasteners.

Furthermore, since the outer cylinder and the inner cylinder are rotatable in conjunction with the twisting direction of the string, the twisting of the string can be alleviated, and the small diameter cylindrical opening part with a bellows-like protrusion on the outer circumferential surface can be used. Its practical value is great, as it bends in conjunction with the direction of the string's movement, smoothing the bending of the string and preventing wear and tear at its base, and these actions improve the overall feeling of use. There is something.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the assembled state of the grip, outer cylinder, and inner cylinder of the rope stopper in the rope jumping device according to the present invention, Fig. 2 is a sectional view of the grip after the assembly is completed, and Fig. 3 is the sectional view of the rope stopper according to the present invention. FIG. 3 is a cross-sectional view showing a modified example of the string stopper in the jump rope equipment according to the present invention. DESCRIPTION OF SYMBOLS 1... Grip, 1a... Distal end surface, 1b... Base end part, 11... Strap insertion hole, 12... Cylindrical protrusion part,
2...Outer cylinder, 21...Small diameter cylindrical opening, 22
... Tapered surface, 23 ... Large diameter cylindrical part, 3 ... Inner cylinder, 31 ... Hook-shaped part, 4 ... String, 5 ... Cap, 5a ... Cap surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A string stopper that loosely fits into a string insertion hole formed through the tip end surface of a cylindrical grip or the cap surface of a cap that is screwed onto the tip end of a cylindrical grip. , a large-diameter cylindrical part with a threaded groove carved on the inner circumferential surface and a bellows-shaped protrusion on the outer circumferential surface that can be inserted into the string insertion hole at the tip of the large-diameter cylindrical part that can be loosely fitted into the inner circumferential surface of the tip of the cylindrical grip; a small-diameter cylindrical opening portion provided with a small-diameter cylindrical portion; A string-fastening outer cylinder formed by the above-mentioned method, and a plurality of flexible hook-shaped parts that are screwed together with the outer cylinder and protrude inward from the tips of the threaded parts. The end of the string to be inserted into the string insertion hole is inserted through the small diameter cylindrical opening into the outer tube for string fixing, and in this state, the inner tube for string fixing is inserted into the outer tube. A string stopper for rope jumping equipment that screws together to stop the tip of the string.