JP7488627B1 - Rope stopper for skipping rope - Google Patents

Abstract

[Problem] To provide a rope stopper for skipping ropes with a simple structure [Solution] A rope stopper for skipping ropes (1) is disposed in a cylindrical grip (5) having a hollow portion (5c) and configured to be releasably temporarily fixed to a desired portion of a skipping rope (3) inserted into the hollow portion of the grip and to prevent it from slipping out. The rope stopper comprises an outer ring member (9) having an outer hollow portion (9c) for inserting the skipping rope and a press-fit recess (9d) with a larger diameter than the outer hollow portion, and an inner ring member (77) having an inner hollow portion (7c) that can be releasably press-fitted into the press-fit recess and for inserting the skipping rope, the outer hollow portion and the inner hollow portion being non-concentric with each other so that the desired portion of the skipping rope inserted into each of them is temporarily fixed by being pinched in a bent state by the press-fit. Simply by pressing the inner ring into the outer ring, the skipping rope can be fixed and prevented from slipping out of the grip. [Selected drawing] Figure 7

Description

This invention relates to a rope fastener for skipping ropes that temporarily secures the end of the rope within the grip.

Patent Document 1 shows a length adjustment fixture that clamps both ends of a rope inserted into the grip of a jump rope by radially compressing clamping means inserted into the narrow diameter portion of the grip. The clamping means has a shape similar to a trivet with multiple legs, and the tip of each leg clamps both ends of the rope in a wedge shape.

Japanese Patent Application Laid-Open No. 07-88210

However, the clamping means of Patent Document 1 has a shape similar to a trivet as described above, and therefore has a problem in that its structure is complex. The present invention aims to provide a rope stopper for skipping ropes (hereinafter simply referred to as a "rope stopper") that has a simple structure.

To achieve the above objective, the present invention has the following features:

(Features of the invention described in claim 1)
The rope stopper according to the invention described in claim 1 is a rope stopper for a skipping rope that is disposed in a cylindrical grip having a hollow portion through which an end of a skipping rope inserted through one opening can be pulled out from the other opening, and is configured to be releasably temporarily fixed to a desired portion of the skipping rope inserted into the hollow portion of the grip and to prevent the skipping rope from slipping out of the one-end opening. The rope stopper according to claim 1 comprises an outer ring member having an outer hollow portion for inserting the skipping rope and a press-fit recess with a larger diameter than the outer hollow portion, and an inner ring member having an inner hollow portion that can be releasably press-fitted into the press-fit recess and for inserting the skipping rope, and is configured such that the outer hollow portion and the inner hollow portion are non-concentric with each other so that the desired portion of the skipping rope inserted into each of them is temporarily fixed by being pinched in a bent state by the press-fit.

(Feature of the invention described in claim 2)
The rope fastener according to the invention of claim 2 is a preferred embodiment of the fastener of claim 1, wherein the inner ring member comprises an inner small diameter portion press-fitted into the press-fit recess, and an inner large diameter portion having a larger diameter than the inner small diameter portion and continuing through an inner step portion.
It is characterized by, It is characterized by.

(Feature of the invention described in claim 3)
The rope fastener of the invention described in claim 3 is a preferred embodiment of the fastener of claim 1 or 2, characterized in that the outer hollow portion is formed at the radial center of the outer ring member, and the inner hollow portion is formed eccentrically in the radial direction of the inner ring member.

According to the present invention, the jump rope can be secured to the grip by simply pressing an inner ring, which has a similarly simple structure, into an outer ring, which is a component with a simple structure, and the rope can be secured to the grip by pressing the inner ring, which has a similarly simple structure, into the outer ring.

FIG. FIG. FIG. 1 is a vertical cross-sectional view of a rope fastener. Hatching is omitted. FIG. FIG. 6 is a perspective view of the rope fastener as viewed from the opposite direction to that of FIG. 5 . 1 is a vertical cross-sectional view of a rope fastener housed in a grip, hatching not shown.

The following describes an embodiment of the present invention (hereinafter, appropriately referred to as "this embodiment") with reference to each figure.

(Structure of the skipping rope)
The reference numeral 1 in FIG. 1 indicates a skipping rope. The skipping rope 101 is a tool for playing or exercising, in which a person jumps over a skipping rope that is mainly spun with both hands and passes near the ground. It is sometimes simply called a skipping rope or a jump rope. The skipping rope 101 mainly comprises a skipping rope 3, grips 5, 5 attached to both ends of the skipping rope 3, and rope stoppers 1, 1 inserted in the grips 5, 5. One of the two rope stoppers 1 is drawn so as to be visible inside one grip 5 (left side of FIG. 1), but the rope stopper 1 inserted in the other grip 5 (right side of FIG. 1) is hidden and cannot be seen in FIG. 1. In the following description, only one grip 5 will be described, and the other grip 5 will not be described because it has the same structure and function as the one grip 5.

The grip 5 is a cylindrical member having a predetermined diameter and a predetermined length and having a hollow portion 5c. The material of the grip 5 is generally synthetic resin because of its lightness and ease of manufacture, but there is no particular restriction. The hollow portion 5c starts from one end opening 5a located on the jump rope 3 side and ends at the other end opening 5b located on the opposite side. Here, the hollow portion 5c is designed so that the end of the jump rope 3 inserted from the one end opening 5a can be pulled out from the other end opening 5b. In other words, a part of the jump rope 3 is arranged in the hollow portion 5c. The rope stopper 1 is temporarily fixed to a desired part of the jump rope 3 inserted into the hollow portion 5c in a releasable manner and is configured in a shape that does not come out from the one end opening 5a. On the other hand, the rope stopper 1 is designed to come out from the other end opening 5b. In other words, the rope stopper 1 is restricted from moving in one direction from the one end opening 5a to the other end opening 5b. The releasable temporary fixation will be described later. The material of the skipping rope 3 can be anything that can be used for skipping, and is usually plastic, wire, rope, beads, etc. The cross-sectional shape of the skipping rope 3 in this embodiment is circular, but is not limited to this.

(Configuration of rope fastener)
The rope stopper 1 shown in Figures 2 to 7 is a component that includes an outer ring member 9 into which the skipping rope 3 is inserted, as well as an inner ring member 7, and is made entirely of synthetic resin. The outer ring member 9 and the inner ring member 7 are made with an outer diameter that allows them to fit loosely into the hollow portion 5c of the grip 5 when combined as described below (Figures 1 and 7).

(Structure of outer ring member)
As shown mainly in Figures 5 and 6, the outer ring member 9 is literally a ring-shaped member, and has an outer hollow portion 9c with a circular cross section that penetrates in the length direction. The outer hollow portion 9c is located at the center of the outer ring member 9. By having the outer hollow portion 9c at the center, the skipping rope 3 is located at the center of the opening 5a on one end side of the grip 5, which makes it easier to keep the rotation of the skipping rope 3 uniform. On the other hand, it can be made eccentric by a desired dimension in the radial direction. The reason why the cross-sectional shape of the outer hollow portion 9c is circular as described above is that the cross-sectional shape of the skipping rope 3 is circular so that it can be easily inserted, but it is not intended to prevent shapes other than circular. It is preferable that the diameter dimension of the outer hollow portion 9c is set to a dimension that provides friction that prevents the inserted skipping rope 3 from slipping off under its own weight, that is, that allows it to be temporarily fixed in a releasable manner. By making it possible to temporarily fix it, the work becomes easier, such as being able to temporarily let go of the skipping rope 3 when adjusting its length (the length inserted into the grip 4). Although it is not prohibited to provide a special structure for temporary fixing, temporary fixing by friction is structurally simple. Release and repositioning with release can be done very easily by simply holding the outer ring member 9 and sliding it in the length direction of the skipping rope 3.

The outer ring member 9 has an outer small diameter portion 9b that directly surrounds the outer hollow portion 9c, and an outer large diameter portion 9a that is larger in diameter and concentric with the outer small diameter portion 9b and is shifted toward the inner ring member 7. From the outside, the outer small diameter portion 9b protrudes from the outer large diameter portion 9a in the length direction (Fig. 5). The outer large diameter portion 9a has a press-fit recess 9d that is larger in diameter and concentric with the outer hollow portion 9c, and an outer step portion 9e is interposed between them (Fig. 6). The press-fit recess 9d surrounds a part of the outer hollow portion 9c, or it can be said that it is a space that also serves as a part of the outer hollow portion 9c. The outer peripheral surface of the outer large diameter portion 9a should be knurled (not shown) so that the force of the fingers can be easily transmitted during work. The reference symbol 9f in Fig. 6 indicates the end face (outer end face) of the outer large diameter portion 9a that faces the inner ring member 7. The outer diameter of the outer large diameter portion 9a is made larger than the inner diameter of the one end opening 5a to prevent it from slipping out of the grip 5.

(Structure of inner ring member)
Continuing the explanation, we will focus on Figures 5 and 6. The inner ring member 7 has an inner small diameter portion 7b that is pressed into the press-fit recess 9d of the outer ring member 9, and an inner large diameter portion 7a that is concentric with the inner small diameter portion 7b and has a larger diameter than the inner small diameter portion 7b. An inner step portion 7e is interposed between the inner small diameter portion 7b and the inner large diameter portion 7a. The outer diameter of the inner small diameter portion 7b is smaller than the inner diameter of the press-fit recess 9d by an amount suitable for releasable manual press-fitting. It is preferable that the length of the inner small diameter portion 7 is formed longer than the length of the press-fit recess 9d. If it is too short, it is considered that the space created between the inner end surface 7f and the outer step portion 9e when pressed in will not be sufficient to clamp the skipping rope 3 in a bent state (Figure 7).

The inner hollow portion 7c penetrates both the inner large diameter portion 7b and the inner large diameter portion 7a. The diameter of the inner hollow portion 7c is preferably set to a size that provides friction to the extent that the inserted skipping rope 3 does not slip off under its own weight, in other words, that allows it to be temporarily fixed in a releasable manner, similar to the diameter of the outer hollow portion 9c. The inner hollow portion 7c is radially eccentric with respect to the center of the inner large diameter portion 7b and the inner large diameter portion 7a. This is to make it non-concentric with the center of the outer hollow portion 9c. Because it is non-concentric, the skipping rope 3 inserted into the inner hollow portion 7c is clamped in a bent state between the inner end surface 7f and the outer step portion 9e when pressed in (Figure 7). In this embodiment, in order to form a non-concentric relationship, the outer hollow portion 9c is arranged at the center of the outer ring member 9, and the inner hollow portion 7c is arranged at a position eccentric in the radial direction of the inner ring member 7, as described above, but this relationship may be reversed. In addition, both the inner hollow section 7c and the outer hollow section 9c may be radially offset from the center. The outer peripheral surface of the inner large diameter section 7a may be knurled (not shown) to facilitate the transfer of finger pressure during work.

(How to use a skipping rope)
As described above, the rope stopper 1 is temporarily fixed to the desired portion of the skipping rope 3 inserted in the hollow portion 5c of the grip 5 in a releasable manner, and is configured in a shape that does not allow it to come out of the opening 5a on one end side (FIG. 7). If the skipping rope 3 is then held and pushed back into the grip 5, the rope stopper 1 comes out of the opening 5b on the other end side of the grip 5 together with the skipping rope 3. If the outer large diameter portion 9a and the inner large diameter portion 7a of the rope stopper 1 that has come out are each held by hand and pulled apart, the inner small diameter portion 7b (inner ring member 7) that was pressed into the press-fit recess 9d (outer ring member 9) comes out, and the bent state of the skipping rope 3 is released, allowing it to move. If both the inner ring member 7 and the outer ring member 9 are then moved to the desired position of the skipping rope 3 and then pressed in again, the bend in the skipping rope 3 is reformed inside the rope stopper 1, restricting movement. In this state, when the skipping rope 3 is pulled toward the opening 5a at one end, the rope stopper 1 is pulled into the grip 5 (hollow portion 5c) from the opening 5b at the other end (Fig. 1), and is blocked by the opening 5a at one end, preventing any further movement (Fig. 7). This completes the length adjustment of the skipping rope 3. The above is the length adjustment at one grip, but the same applies to the length adjustment at the other grip 5.

(Effects unique to this embodiment)
As described above, the length of the skipping rope can be adjusted using only the minimum number of components, the inner ring member 7 and the outer ring member 9, and the adjustment operation is simple. This is a very easy-to-use rope stopper 1.

1: rope stopper, 3: skipping rope, 3a: bending portion, 5: grip, 5a: one end opening, 5b: other end opening, 5c: hollow portion, 7: inner ring member, 7a: inner large diameter portion, 7b: inner small diameter portion, 7c: inner hollow portion, 7e: inner step portion, 7f: inner end surface, 9: outer ring member, 9a: outer large diameter portion, 9b: outer small diameter portion, 9c: outer hollow portion, 9d: press-fit recess, 9e: outer step portion, 9f: outer end surface, 101: skipping rope tool

Claims (3)

A rope stopper for a skipping rope is disposed in a cylindrical grip having a hollow portion through which an end of a skipping rope inserted from an opening on one end side can be pulled out from an opening on the other end side, and is temporarily and releasably fixed to a desired portion of the skipping rope inserted into the hollow portion of the grip and configured in a shape that prevents the rope from slipping out of the opening on the one end side.
The jump rope is provided with an outer ring member having an outer hollow portion for inserting the jump rope and a press-fit recess having a larger diameter than the outer hollow portion, and an inner ring member having an inner hollow portion that can be releasably press-fitted into the press-fit recess and for inserting the jump rope,
The outer hollow portion and the inner hollow portion are non-concentrically configured so that a desired portion of the skipping rope inserted into each of them is temporarily fixed by being pressed into the outer hollow portion and being bent.
A rope fastener for a skipping rope. The inner ring member includes an inner small diameter portion press-fitted into the press-fit recess, and an inner large diameter portion having a larger diameter than the inner small diameter portion and continuing through an inner step portion.
2. The jump rope fastener according to claim 1. The outer hollow portion is formed at the radial center of the outer ring member, and the inner hollow portion is formed eccentrically in the radial direction of the inner ring member.
3. The rope fastener for a skipping rope according to claim 1 or 2.

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