JP2011135970A - Damage preventive implement for rhythmic sportive gymnastic stick, and rhythmic sportive gymnastic stick - Google Patents

Abstract

An object of the present invention is to prevent external damage caused by a rotating support.
A tip of a stick body 2 in a rhythmic gymnastic stick 1 having a tip 2a of a stick body 2 having a rotation support fitting (rotation support tool) 3 that enables free rotation with respect to a ribbon R is provided. It is a damage prevention tool 4 that prevents damage to the outside by the rotation support fitting 3 by being provided, and in the state of being provided at the tip end portion 2 a of the stick body 2, a cylindrical portion 42 surrounding the periphery of the rotation support fitting 3 on the tip end side. It has comprised so that it may have. Further, the rhythmic gymnastics stick 1 is configured by the provision of the damage prevention tool 4.
[Selection] Figure 1

Description

  The present invention relates to a rhythmic gymnastics stick damage prevention tool used in a ribbon which is one of the sporting events of rhythmic gymnastics, and a rhythmic gymnastics stick using the damage prevention tool.

  As this type of rhythmic gymnastics stick, there is known a stick equipped with a rotation support bracket (rotation support) for rotatably supporting the ring at the tip of the stick body which is gradually tapered toward the tip. (For example, Patent Document 1). The rotation support bracket includes a fixed portion that is fitted to the distal end portion of the stick main body, and a rotation shaft that protrudes from the distal end of the fixed portion and is configured to be rotatable with respect to the fixed portion, and is thinner than the fixed portion. Part. The said ring is attached to a rotating shaft part through the through-hole formed in the rotating shaft part. A ribbon is attached to the ring via a swivel.

Japanese Utility Model Publication No. 60-58154

  However, in the above-mentioned rhythmic gymnastics stick, the rotation support bracket is at the tip of the stick body and has a relatively sharp shape. There was a risk of damage to the outside, such as being scratched.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the damage prevention tool of a rhythmic gymnastics stick, and a rhythmic gymnastics stick without the possibility of damage to the exterior by a rotation support tool.

  In order to solve the above-mentioned problems, the damage prevention device according to claim 1 is characterized in that the stick body in the rhythmic gymnastics stick provided with a rotation support device at the tip end portion of the stick body that enables free rotation with respect to the ribbon. A damage prevention device that prevents damage to the outside due to the rotation support device by being provided at the tip portion of the stick, and in a state of being provided at the tip portion of the stick body, a cylinder surrounding the periphery of the rotation support device on the tip side It has the shape part. The damage prevention tool may be provided directly at the tip of the stick body or may be provided at the tip via a rotation support tool.

  The damage prevention tool according to claim 2 is characterized in that, in the invention according to claim 1, the cylindrical portion is formed so as to expand in diameter toward the front.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the tubular portion is attached to a through-hole formed in a rotating shaft portion that protrudes toward the distal end side of the rotating support device. The inner diameter dimension is set so that the ring that is connected to the ribbon can rotate together with the rotating shaft portion.

  The damage prevention tool according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the damage prevention tool is integrally formed of a material having rubber elasticity.

  The damage prevention tool according to claim 5 is the stick according to any one of claims 1 to 4, wherein the stick is a fixed part of the rotation support tool and rotatably supports the rotation shaft part. It has the to-be-latched part latched to the latching | locking part provided in the fixing | fixed part attached to the front-end | tip part of a main body.

  The rhythmic gymnastics stick according to claim 6 is a rhythmic gymnastics stick having a rotation support tool at a tip end portion of the stick body that enables free movement in the rotational direction with respect to the ribbon. The rhythmic gymnastics stick damage prevention tool according to any one of the above is provided at the tip of the stick body. The damage prevention tool may be configured to be provided directly at the tip of the stick body or may be configured to be provided at the tip through a rotation support tool.

  The rhythmic gymnastics stick according to claim 7 is the invention according to claim 6, wherein the rotation support tool is fixed to a tip part of the stick body, and protrudes from a tip of the fixing part. A rotating shaft portion that is rotatable with respect to the fixed portion, and a sliding bearing portion that rotatably supports the rotating shaft portion is configured in the fixed portion.

  According to the damage prevention device for a rhythmic gymnastic stick according to claim 1, since the cylindrical support member is formed so as to surround the periphery of the distal end side of the rotation support device, It is possible to prevent hitting the wall directly. Therefore, damage to the outside due to the rotating support can be prevented.

  In addition, since a cylindrical space that allows the ribbon to freely rotate can be secured around the front end side of the rotation support tool, the rotation of the ribbon is not hindered by the cylindrical portion.

  According to the damage prevention device for the rhythmic gymnastics stick according to claim 2, since the cylindrical portion is formed so as to expand toward the front, more efficient for giving the ribbon free rotation. A good widening space can be secured.

  According to the third aspect of the present invention, the inner diameter dimension of the cylindrical portion is set so that the ring attached to the through hole of the rotation shaft portion of the rotation support can rotate together with the rotation shaft portion. Therefore, the rotation of the ribbon can be prevented from being restricted by the ring being rubbed against the inner surface of the cylindrical portion.

  According to the damage prevention device for a rhythmic gymnastic stick according to claim 4, since it is integrally formed of a material having rubber elasticity, for example, even when the cylindrical part hits a human body, the cylindrical part is damaged by the cylindrical part. It can be prevented from receiving. In addition, in the case where the axial tip of the cylindrical part is pressed against an external object having a surface substantially perpendicular to the axial direction, the cylindrical part itself is kept in a high rigidity state. Therefore, it is possible to prevent the object from hitting the rotation support tool. On the other hand, when the tip in the axial direction of the cylindrical part is inclined with respect to the axial direction and hits an external object, the cylindrical part is curved and deformed so that the peripheral wall part of the cylindrical part covers the rotating support. Therefore, in this case as well, it is possible to prevent an external object from hitting the rotating support. Therefore, damage to the outside due to the rotating support can be prevented.

  According to the damage prevention device for the rhythmic gymnastics stick according to claim 5, since it has the locked portion that locks to the locking portion provided in the fixed portion of the rotation support tool, the locked portion By locking the to the locking portion, it is possible to attach the damage prevention tool at a predetermined position in the tip portion of the stick body.

  According to the rhythmic gymnastic stick according to claim 6, since the damage preventing device for the rhythmic gymnastic stick according to any one of claims 1 to 5 is provided at the tip of the stick body, the above-described effect It is possible to provide a rhythmic gymnastics stick having:

  According to the rhythmic gymnastic stick according to claim 7, since the slide bearing portion that rotatably supports the rotating shaft portion is configured on the fixed portion of the rotating support, the rotating shaft portion can be freely rotated on the fixed portion. Compared to the case of configuring a supporting ball bearing portion, the fixed portion can be reduced in diameter and weight. Further, the damage prevention tool attached to the fixed portion can also be reduced in size and weight.

It is a principal part fracture | rupture front view of the rhythmic gymnastics stick shown as one Example of this invention. It is a figure which shows the front-end | tip part of the rhythmic gymnastics stick, Comprising: (a) is sectional drawing, (b) is sectional drawing which shows the damage prevention tool provided in a front-end | tip part, (c) is provided in a front-end | tip part It is a disassembled sectional view which shows a rotation support metal fitting. It is a figure which shows the front-end | tip part of the rhythmic gymnastics stick, Comprising: It is sectional drawing which shows the state after rotating the rotating shaft part of a rotation support metal fitting 90 degree with respect to Fig.2 (a). It is explanatory drawing which shows the effect of the damage prevention tool in the rhythmic gymnastics stick. It is a figure which shows the other example of the damage prevention tool in the rhythmic gymnastics stick, (a) is a latching | locking part at the time of forming a damage prevention tool using the material with comparatively high rigidity which does not have rubber elasticity, and covered It is a half sectional view showing a locking part, (b) is a half sectional view showing what formed a cylindrical part in the shape of a cylinder, and (c) is what formed the cylindrical part by a plurality of stages of cylindrical parts (D) is a half cross-sectional view showing the tip edge of the cylindrical portion rounded into an arc shape, and (e) is a flange that spreads outward at the tip edge of the cylindrical portion. It is a half sectional view showing what is provided so that it can be locked to one end and the other end of the fixed part as a locked part.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated in detail based on an Example. In addition, both the damage prevention tool and the rhythmic gymnastics stick using this damage prevention tool are demonstrated by showing the Example of the rhythmic gymnastics stick with a damage prevention tool.

  As shown in FIG. 1, a rhythmic gymnastic stick 1 shown in this embodiment has a stick body 2 that is gradually reduced in diameter toward the tip, and a rotation support provided at the tip 2a of the stick body 2. A metal fitting (rotation support tool) 3 and a damage prevention tool 4 for preventing damage to the outside due to the rotation support metal fitting 3 by being provided at the tip 2a of the stick body 2 are provided. In addition, the stick main body 2 has shown only the front-end | tip part 2a.

  The rotation support fitting 3 is for enabling free rotation with respect to the ribbon R, and a fixing portion 31 fixed to the tip portion 2a of the stick body 2 with an adhesive or the like, and the fixing portion 31 And a rotary shaft portion 32 that is rotatably provided. The fixing unit 31 includes a main body unit 33 and a holding unit 34.

  As shown in FIG. 2, the main body portion 33 is formed in a columnar shape, a bearing hole 33 a is formed along the axis from one end surface thereof, and the stick main body is formed along the axis from the other end surface. A connection hole 33b is formed for connection to the two distal end portions 2a. In addition, a locking portion 33 c that extends annularly in the circumferential direction is formed on the outer peripheral surface of the main body portion 33. The locking portion 33c is located between the bearing hole 33a and the coupling hole 33b in the axial direction of the main body portion 33, and is formed in a concave shape having a rectangular cross section. The bearing hole 33a is surrounded by a bearing cylindrical portion 33d. The main body 33 configured in this way is integrally formed of brass (brass) used as a material for a sliding bearing.

  As shown in FIG. 2C, the holding portion 34 has a cylindrical inner peripheral surface, and an outer peripheral surface having a first tapered outer peripheral surface 34 a and a second tapered outer peripheral surface 34 b. Both the first taper outer peripheral surface 34a and the second taper outer peripheral surface 34b are formed so as to gradually expand in diameter from one end side to the other end side. A boundary portion between the first taper outer peripheral surface 34 a and the second taper outer peripheral surface 34 b is formed by a boundary surface 34 c orthogonal to the axial direction of the holding portion 34. The diameter of the maximum diameter portion of the first tapered outer peripheral surface 34a is larger than the diameter of the bearing hole 33a, and the diameter of the maximum diameter portion of the second tapered outer peripheral surface 34b is smaller than the diameter of the bearing hole 33a. It has become.

  That is, in the state where the second tapered outer peripheral surface 34b is inserted into the bearing hole 33a, the holding portion 34 is configured such that the boundary surface 34c abuts against the end surface of the bearing cylindrical portion 33d. A space for rotatably holding the bulging portion 32b of the rotating shaft portion 32 is secured inside. Further, a tapered surface 34 d is formed on the base end surface of the holding portion 34. The tapered surface 34 d is formed so as to gradually become deeper toward the inner peripheral surface of the holding portion 34.

  The holding portion 34 is drawn so that the bearing cylindrical portion 33d is in close contact with the second tapered outer peripheral surface 34b in a state where the boundary surface 34c is in contact with the end surface of the bearing cylindrical portion 33d. It is designed to be fixed to the part. The holding part 34 is integrally formed of stainless steel.

  As described above, the holding portion 34 and the portion of the bearing hole 33 a constitute a sliding bearing portion that rotatably supports the rotating shaft portion 32 at one end portion of the fixed portion 31.

  The rotating shaft portion 32 is coaxially and integrally formed by a main shaft portion 32a having a diameter that is rotatably fitted to the inner peripheral surface of the holding portion 34 and a bulging portion 32b formed at the other end portion of the main shaft portion 32a. Is formed. One end surface of the bulging portion 32b is a tapered surface 32c having an angle matching the tapered surface 34d of the holding portion 34, and the other end surface is formed by a plane perpendicular to the axial direction.

  Moreover, the outer diameter of the bulging part 32b is formed smaller than the diameter of the bearing hole 33a. Further, the length of the bulging portion 32b in the axial direction is such that the taper surface 32c of the bulging portion 32b is in contact with the taper surface 34d of the holding portion 34 fixed to the bearing hole 33a. The dimension is set such that a slight gap is provided between the other end surface of 32b and the bottom surface 33e of the bearing hole 33a.

  The main shaft portion 32a is formed with a through hole 32d orthogonal to the axial direction at one end thereof. As shown in FIG. 2A, the through-hole 32d of the rotating shaft portion 32 is formed to have a diameter that allows attachment of an annular split ring (ring) SR. The rotary shaft portion 32 configured in this manner is integrally formed of brass (brass) used as a material for a sliding bearing.

  When the holding portion 34 is fixed to the bearing hole 33a with the bulging portion 32b of the rotation shaft portion 32 inserted into the bearing hole 33a, the bearing shaft 33a and the like are lubricated with the rotation shaft portion 32. It is preferable to enclose a lubricant such as grease.

  The split ring SR is formed by winding a stainless steel wire in an annular shape that is substantially double overlapped, and can be attached to and detached from the through hole 32d of the rotary shaft portion 32. A ribbon R is attached to the split ring SR via a swivel S as shown in FIG.

  As shown in FIGS. 2 (a) and 2 (b), the damage prevention tool 4 is located on a base portion 41 that is connected to the fixing portion 31 of the rotary support fitting 3 and one end side of the base portion 41. It has a cylindrical portion 42 formed so as to surround the periphery of the distal end side of the rotation support fitting 3, and the whole is integrally formed of a material having rubber elasticity.

  The base portion 41 is formed in a cylindrical shape whose inner diameter is slightly smaller than the outer diameter of the fixed portion 31, and the inner peripheral surface thereof is in close contact with the outer peripheral surface of the fixed portion 31.

  Further, the base portion 41 is formed with a locked portion 41a having a shape that fits the locking portion 33c of the fixing portion 31 at a predetermined position in the axial direction on the inner peripheral surface thereof. The locked portion 41a is formed to extend annularly in the circumferential direction. Further, the base portion 41 is formed with ribs (locked portions) 41b protruding inwardly on the inner peripheral surface of the other end portion. The rib 41b also extends annularly in the circumferential direction.

  Then, by locking the locked portion 41a to the locking portion 33c, the rib 41b is locked to the other end portion of the fixing portion 31 (that is, the other end portion of the main body portion 33), and the tube A shape portion 42 surrounds the periphery of the distal end side of the rotation support fitting 3. The rib 41b has a second end portion (in this example, a chamfered portion) of the fixing portion 31 as a locking portion, and functions as a locked portion to be locked to the locking portion. Together with the locking part 41a, the damage preventing tool 4 is held in the fixing part 31.

  The cylindrical portion 42 is formed in a tapered shape that gradually increases in diameter from one end portion of the base portion 41 toward the front. In addition, as shown in FIG. 3, the cylindrical portion 42 has the split ring SR attached to the through hole 32d of the rotating shaft portion 32 in the state where the locked portion 41a is locked to the locking portion 33c. The inner diameter dimension is set so that it can rotate together with the shaft portion 32. That is, the inner diameter of the cylindrical portion 42 is formed larger than the outer diameter of the split ring SR attached to the through hole 32d of the rotating shaft portion 32.

  In the rhythmic gymnastic stick 1 configured as described above, the damage prevention tool 4 having the cylindrical portion 42 formed so as to surround the periphery of the distal end side of the rotation support fitting 3 is attached to the distal end portion 2a of the stick body 2. Since it is provided, the rotation support fitting 3 can be prevented from directly hitting a person, a floor, a wall or the like. Therefore, it is possible to prevent the external support object such as a person from being damaged by the rotation support fitting 3.

  In addition, the tubular portion 42 of the damage prevention device 4 is an efficient and tapered taper space for giving free rotation to the ribbon R via the split ring SR or the like around the distal end side of the rotation support fitting 3. Therefore, the rotation of the ribbon R can be prevented from being hindered by the cylindrical portion 42.

  Furthermore, since the inner diameter dimension of the cylindrical portion 42 is set so that the split ring SR attached to the through hole 32d of the rotation shaft portion 32 can rotate together with the rotation shaft portion 32, the split ring SR is By being rubbed against the inner surface of the cylindrical portion 42, it is possible to prevent the rotation of the ribbon R from being restricted as much as possible.

  Furthermore, since the damage prevention tool 4 is integrally formed of a material having rubber elasticity, it is possible to reliably prevent the object from being damaged when the damage prevention tool 4 hits an external object. . Further, when the front surface of the cylindrical portion 42 is directly pressed against an external object as it is, the rigidity of the cylindrical portion 42 itself is maintained high, so that the external object hits the rotation support fitting 3. Can be prevented. On the other hand, when the front surface of the cylindrical portion 42 is slightly inclined and hits an external object, it is curved so that the peripheral wall portion of the cylindrical portion 42 covers the rotation support fitting 3 as shown in FIG. In this case as well, it is possible to prevent an external object from hitting the rotary support fitting 3. That is, damage to the outside can be prevented.

  Further, the damage prevention tool 4 can be easily attached to a predetermined position in the distal end portion 2a of the stick body 2 only by locking the locked portion 41a to the locking portion 33c, and at the predetermined position. It can be held securely. Moreover, the damage prevention tool 4 can also be easily removed from the fixing | fixed part 31 by giving a deformation | transformation which expands the part of the to-be-latched part 41a in the damage prevention tool 4 using rubber elasticity.

  Furthermore, since the rotary shaft portion 32 is rotatably supported by the sliding bearing portion provided in the fixed portion 31 of the rotation support bracket 3, compared to the case where the rotary shaft portion 32 is rotatably supported using the ball bearing portion. Thus, the diameter and weight of the fixing portion 31 can be reduced. Moreover, there is an advantage that the damage prevention tool 4 attached to the fixing portion 31 can be made smaller.

  In the above embodiment, the damage prevention tool 4 is made of a material having rubber elasticity. However, the damage prevention tool 4 is made of a material having relatively high rigidity such as plastic having no rubber elasticity. It may be formed. However, in that case, as shown in FIG. 5 (a), the locking portion 33c has a shallow concave shape and is formed so as to gradually become deeper toward the other end side. Also, it is preferable to form a convex shape with a small protrusion amount that matches the locking portion 33c. The rib 41b is preferably formed with a small protrusion. With this configuration, the locked portion 41a can be locked to the locking portion 33c by a small elastic deformation of the damage preventing device 4, and the damage preventing device 4 can be protected against the force from the front. It is possible to reliably prevent the rearward movement with respect to the fixing portion 31.

  Moreover, although what was formed in the taper shape as the cylindrical part 42 was shown, this cylindrical part 42 may be formed cylindrically as shown in FIG.5 (b). Further, as shown in FIG. 5 (c), the cylindrical portion 42 has a plurality of (in this example, two) cylindrical portions that are successively expanded in diameter so as to expand toward the front. It may be formed.

  On the other hand, the tip edge portion of the cylindrical portion 42 has a semicircular arc shape in a cross-sectional view as shown in FIG. 5D and a flange that spreads outward as shown in FIG. 5E. It may be formed as described above. In the case where the tip edge portion of the cylindrical portion 42 is rounded in an arc shape or provided with a flange, even when the damage prevention tool 4 is formed of a hard material having a relatively high rigidity such as plastic, the tip thereof It is possible to prevent the external object from being damaged by hitting the edge.

  Furthermore, as shown in FIG. 5E, the locking portion 33c can be substituted with one end portion and the other end portion of the fixing portion 31. That is, one end portion and the other end portion formed by the tapered inclined surface of the fixing portion 31 are set as locking portions, and the locked portion 41a locked to these locking portions is integrated with the damage prevention device 4. You may make it provide in. Even in such a configuration, the damage prevention tool 4 can be held at a predetermined position of the rotation support fitting 3. Needless to say, even when the one end surface and the other end surface are formed by surfaces orthogonal to the axial direction, the one end surface and the other end surface can be used as a locking portion. Moreover, when the one end part and the other end part of the fixing part 31 are used as locking parts in this way, it becomes possible to attach the damage prevention tool 4 to a generally used rhythmic gymnastics stick. .

  Moreover, although the example of the rotation support metal fitting 3 provided with the metal main-body part 33, the holding | maintenance part 34, and the rotating shaft part 32 was shown as a rotation support tool, as this rotation support tool, for example, a plastic main-body part, It may be made of a material other than metal, such as one having a holding part and a rotating shaft part.

DESCRIPTION OF SYMBOLS 1 Rhythmic gymnastic stick 2 Stick main body 2a Tip part 3 Rotation support metal fitting (rotation support tool)
4 Damage prevention tool 31 Fixing part 32 Rotating shaft part 32d Through-hole 33c Locking part 41a Locked part 42 Cylindrical part R Ribbon SR Split ring (ring)

Claims (7)

By providing a rotation support that enables free rotation with respect to the ribbon at the tip of the stick body in a rhythmic gymnastics stick provided at the tip of the stick body, damage to the outside due to the rotation support is prevented. A damage prevention tool,
A tool for preventing damage to a rhythmic gymnastics stick, characterized in that, in the state of being provided at the tip of the stick body, it has a cylindrical part surrounding the periphery of the tip of the rotary support.   2. The tool for preventing damage to a rhythmic gymnastics stick according to claim 1, wherein the cylindrical part is formed so as to expand in diameter toward the front.   The cylindrical part is a ring attached to a through hole formed in a rotary shaft part protruding toward the tip side of the rotary support tool, and the ring for connecting to the ribbon rotates together with the rotary shaft part. 3. An instrument for preventing damage to a rhythmic gymnastics stick according to claim 1 or 2, wherein an inner diameter dimension is set so that the rhythmic gymnastics stick can be used.   The damage prevention tool for a rhythmic gymnastics stick according to any one of claims 1 to 3, wherein the rhythmic gymnastics stick is formed integrally with a material having rubber elasticity.   A fixed portion of the rotation support, and a locked portion that is locked to a locking portion provided on a fixed portion that is attached to a distal end portion of the stick body so as to rotatably support the rotating shaft portion. The damage prevention tool for a rhythmic gymnastics stick according to any one of claims 1 to 4. A rhythmic gymnastics stick having a rotation support at the tip of the stick body that allows free movement in the rotational direction relative to the ribbon,
A rhythmic gymnastics stick, wherein the rhythmic gymnastics stick damage prevention device according to any one of claims 1 to 5 is provided at a tip of the stick body. The rotating support has a fixed portion fixed to the tip end portion of the stick body, and a rotating shaft portion that protrudes from the tip end of the fixed portion and is rotatable with respect to the fixed portion.
The rhythmic gymnastics stick according to claim 6, wherein the fixed portion includes a sliding bearing portion that rotatably supports the rotating shaft portion.

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