JPH0119971Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a rotating part device for a hanging ring, and in particular to a rotatable suspended support structure of a support and a swing rope.

Conventional technology Suspension rings are equipment used in gymnastics competitions, in which a pair of rotating metal fittings are fixed at a distance from each other to the cross beams of a support made of a gate-shaped frame, and one end of a swing rope is connected to each rotating metal fitting by an appropriate method. and hang it up,
Competitors hold a ring connected to the lower end of a swing rope in various competitions such as pull-up rotations. The pillars are erected and supported on the floor via tension ropes, but in addition to this, there is also a hanging structure in which swing ropes are suspended from a frame installed on the indoor ceiling of a gymnasium, etc. via rotating metal fittings. A folding type and a folding type in which the frame itself can be folded are known. On the other hand, the rotating metal fitting is required to have a lightweight structure that prevents excessive swinging of the swing rope, allows smooth rotation, and allows fine adjustment of the height of the swing rope. This type of rotary fitting that has been provided in the past has an outer tube fixed orthogonally to a short tube that is fitted and fixed to a cross beam of a support, for example, as in the device described in Japanese Utility Model Publication No. 57-31874. An inner tube is inserted into the inner tube, and a bracket is rotatably connected to the lower end of the inner tube via a thrust bearing.A nut is fixed to the inner tube, and then an adjustment bolt is extended in the axial direction. It was inserted and fixed through the cross beam and short tube, and the inner tube was extended and contracted from the outer tube via bolts, making it possible to finely adjust the height of the swing rope.

Problems that the invention attempts to solve However, according to the invention described in the above publication,
Because it is complex and has a large number of parts relative to the intended purpose and function, the structure is somewhat complex and heavy in weight.
Since the swing rope consists of a torsion rope, rotation due to expansion and contraction during competitions works, resulting in a high degree of inertia retention, and the ability to follow movement is greater than necessary, making it easy for the rope to move excessively, resulting in movements that are not as desired by the athlete. The drawback was that I couldn't do it. Moreover,
There were inconveniences such as the loud noise generated by the rotating metal fittings during the swing motion during competitions, which was harsh on the ears.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention fixes a boss to a cross beam such as a support in a perpendicular direction, forms a threaded portion on the inner circumferential surface of the boss, and forms a threaded portion on the inner peripheral surface of the boss. A cylindrical body having a threaded portion on its outer circumferential surface that engages with the cylindrical body is inserted into the boss, and the cylindrical body has a rattle-shaped shaft hole whose diameter gradually increases toward the bottom. A rotating part device of a hanging ring is constructed by fitting a plastic seat through which the upper end of a swing rope passes and seats a rope end fixed to the end.

Effects According to the present invention having the above configuration, the swing rope of the hanging ring passes through the cylindrical body that is threaded onto the boss fixed to the cross beam of the support, and is irremovably connected at the rope end. The shaft hole of the body is formed in a rattling shape with a diameter that gradually increases at the bottom, which simplifies the structure of the rotating part of the hanging ring and makes it lighter, suppressing excessive movement of the swing rope and providing the necessary performance desired by the athlete. It has the effect of making a swing.

Embodiment The present invention will be described below based on an illustrated embodiment.

Figure 1 is a front view of the main part, Figure 2 is a vertical sectional view of the main part,
FIG. 3 is a plan sectional view of the main part.

As shown in FIG. 1, a boss 2 with a T-shaped cross section protrudes downward from the inner bottom of a cross beam 1 such as a support, and is fixed by welding or the like at right angles, and a cylindrical body 3 is screwed onto this boss 2. There is. 2a is a threaded portion carved on the inner peripheral surface of the boss 2, and 3a is a threaded portion carved on the outer peripheral surface of the cylindrical body 3. The cylindrical body 3 has a shaft hole 3b passing through the swing rope 4, and this shaft hole 3b is connected to the knurling part 3.
It is a truss-shaped through hole whose lower diameter gradually increases toward c, and a large diameter recess 3d is bored in its upper part. A plastic seat 5 made of nylon resin or the like is fitted and fixed in the recess 3d, and the upper part of the plastic seat 5 is formed into a substantially hemispherical surface, and a shaft hole 5a through which the swing rope 4 passes through the shaft center. is drilled. Further, an axial key groove 3e is carved on the outer circumference of the cylindrical body 3, and a threaded portion 3
Collar 6 is screwed onto a. An oval retaining ring 7 is inscribed in the collar 6, a locking nut 8 is fixed to the retaining ring 7, and a locking screw 9 such as a hexagon socket head screw is screwed through the collar 6, and the locking screw 9 is inserted into the through hole 6a of the collar 6. It passes through and fits into the keyway 3e. On the other hand, a lock bolt 11 is provided through the lock nut 10 which faces the lock screw 9 in the long diameter direction and is fixed to the retaining ring 7. One end is fitted into the lock bolt 11 and the other end is attached to the collar 6. A spring 12 is loaded in contact with the cutout surface 6b. The spring 12 provides a force that causes the lock screw 9 to constantly engage with the keyway 3e, and prevents the cylindrical body 3 from rotating. 13 is a safety stopper, and bosses 14 and 1 are attached to the inner bottom of the cross beam 1.
4, and is fixed to the lower part of the cross beam 1 with bolts 15, 15 screwed into the bosses 14, 14, and the hook portion 13 thereof extends below the knurled portion 3c.

The upper end of the swing rope 4 passes through the shaft hole 3b of the cylindrical body 3 and the shaft hole 5a of the plastic seat 5, and a rope end 16 made of aluminum alloy or the like is fixed to the end. The rope end 16 abuts against the spherical surface of the plastic seat 5. Further, a ring 19 is connected to the lower end of the swing rope 4 via a sheave 17 and an endless belt 18 passing through the sheave 17.

Next, to explain the operation of the above embodiment, in order to finely adjust the height of the swing rope 4, in the state shown in FIG. It is lifted from the keyway 3e, and then the knurled portion 3c of the cylindrical body 3 is turned to insert and remove the cylindrical body 3 into and from the boss 2. Keyway 3 of cylindrical body 3
It is necessary to make sure that e is placed in a position corresponding to the lock nut 9 so that it can be engaged again after adjustment of the cylindrical body 3. When the adjustment of the cylindrical body 3 is thus completed, the pressure on the retaining ring 7 is released, and the lock screw 9 engages with the keyway 3e, thereby stopping the rotation of the cylindrical body 3. Since the swing rope 4 supported by the cylindrical body 3 has a rattle-shaped shaft hole 3b, it can flexibly cope with the swinging of the swing rope 4, while the rope end 16 is connected to the plastic seat 5. The swing rope 4 is prevented from rotating excessively due to the friction between the two when they collide.

Effects of the Invention According to the invention described above, the rotating part device of the hanging ring is composed of a boss fixed perpendicularly to the cross beam and a cylindrical body screwed into the boss, and the cylindrical body has a fastener. A shaft hole with a diameter that gradually increases at the bottom is drilled in the shape of a shaft hole, and the swing rope passes through the shaft hole, and the end of the rope is placed on a plastic seat at the top of the shaft hole, so the structure is Since it is extremely simple, the weight can be reduced, and excessive rotation and swinging of the swing rope can be suppressed, allowing athletes to compete under desirable conditions.

[Brief explanation of drawings]

FIG. 1 is a front view of essential parts showing an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view of the main part, and FIG. 3 is a plan sectional view of the main part. 1...Horizontal beam, 2...Boss, 2a...Thread, 3...
...Cylindrical body, 3a...Threaded part, 3b...Shaft hole, 3c...
...Knurled portion, 3d...Concave portion, 3e...Keyway, 4...Swing rope, 5...Plastic seat.

Claims (1)

[Scope of utility model registration request] A boss is fixed to a cross beam such as a column in a perpendicular direction, a threaded portion is formed on the inner circumferential surface of the boss, and a cylindrical body having a threaded portion on the outer circumferential surface that is threadedly engaged with the threaded portion is inserted into the boss. The cylindrical body has a rattle-shaped shaft hole whose diameter gradually increases toward the bottom, and the upper end of the swing rope passes through the shaft hole, and the rope end fixed to the end is seated. A rotating part device for a hanging ring, characterized in that it is fitted with a plastic seat that allows the rotation of the hanging ring.