JP4678533B2 - hurdle - Google Patents

Description

  The present invention relates to a hurdle used for athletic hurdle competition.

  The standard height of hurdles varies depending on the event. For example, the height is 1.067 m for “Men's 110 m” and 0.840 m for “Men's 100 m”. Therefore, before each competition, the hurdles must be adjusted to the height corresponding to the event.

Conventional hurdle height adjustments have utilized screw type locks or foot switch type locks.
Japanese Utility Model Publication No.6-21520 Japanese Utility Model Publication No. 3-63399

  For hurdles using a screw-type lock, the bar is adjusted to the desired height after simultaneously releasing the screw-type lock mechanism that fixes the relative positions of the upper and lower columns on the left and right columns. The column is locked while maintaining its height.

  This hurdle using a screw-type lock not only requires two separate actions of “unlocking” and “moving the bar” for height adjustment, but also stands between each action. Because the movement of sitting and sitting was included, it took time and the work itself was painful.

  Therefore, a hurdle using a foot switch type lock was developed. The foot switch type hurdle releases the lock by pressing the foot switch provided on the connecting pipe that connects the lower ends of the left and right columns with the foot, and adjusts the bar to the desired height in that state, While maintaining the height, the foot switch is released and locked.

  The hurdle using the foot switch type lock is much easier to operate than the hurdle using the screw type lock, but it still has two functions: “unlock” and “bar movement” for height adjustment. It was necessary to perform two separate actions.

  Also, if you attempt to adjust the height of a hurdle that uses a footswitch-type lock placed on a hurdle transporter, it is difficult for one person to step on the foot switch of the hurdle placed in the back. It was difficult to adjust.

  The object of the present invention is to provide a hurdle with which the vertical movement of the bar is simple. More specifically, an object is to provide a hurdle capable of performing “unlocking” and “moving a bar” by one operation.

In order to achieve the above object, the hurdle according to the present invention is:
A hurdle having a bar, an upper column supporting the bar, and a lower column supporting the upper column, wherein the upper column is movable up and down relative to the lower column;
A hand-held portion that is provided at the bottom of the bar and can move up and down to enter and exit the bar;
A locking portion for fixing a relative position between the upper column and the lower column;
When the handheld part is pressed against the bar, the relative position between the upper strut and the lower strut is released, and when the handheld part is released from the bar, the position is fixed. And an operating mechanism for operating the locking portion.
Further, the hurdle according to claim 1, wherein the operating mechanism is an operating mechanism that converts the vertical movement of the hand-held part into the horizontal movement of the locking part.
The hurdle according to claim 1 or 2, wherein the upper support column is slidably provided in the lower support column.

  Thus, according to the hurdle according to the present invention, since the hand-held portion provided at the lower portion of the bar bears the lock mechanism, holding the bar in the hand for adjusting the height of the bar, “movement of the bar” Since the lock of the bar is inevitably released when the above operation is performed, “unlocking” and “moving the bar” can be performed in one operation.

  In addition, since the hand-held part is provided at the lower part of the bar, the work of adjusting the height of the bar can be performed only by operating the upper side of the hurdle (the part of the bar). The height can be easily adjusted by one person even in the state of being mounted.

  Next, the hurdles according to the present invention will be described in more detail with reference to the drawings showing embodiments. For convenience, portions having the same function are denoted by the same reference numerals and description thereof is omitted.

  FIG. 1 is a partially sectional front view showing an embodiment of a hurdle according to the present invention. FIG. 2A is a partially sectional right side view of FIG. 1, and FIG. It is sectional drawing.

  The hurdle 1 according to the present invention includes a bar 3, a pair of left and right columns 35, 35 that support the bar 3 via bar receivers 5, 5, and a pair of bases 11, 11 to which the column 35 is fixed. . The pair of left and right support columns 35 are connected by a connecting pipe 13 at the lower ends thereof.

  The support columns 35, 35 are hollow cylindrical outer pipes 9, 9 fixed to the bases 11, 11, and hollow cylinders slidably provided inside the outer pipes 9, 9 and fixed to the bar receivers 5, 5. Shaped inner pipes 7 and 7.

  Two hand-held portions 15 are provided at the lower part of the bar 3. The hand-held portions 15, 15 are fixed to a lever guide plate 17 provided inside the bar 3 so as to be movable up and down, and can be moved up and down in conjunction with the lever guide plate 17. A part of the lower end of the hand-held portions 15, 15 protrudes below the bar 3, and the lever guide plate 17 is pushed up in conjunction with pushing up this portion. A spring 16 is provided on the upper portion of the lever guide plate 17 so that a downward force is always applied, thereby preventing the lever guide plate 17 from moving up and down due to vibration or the like.

  A shaft 17 a is provided at both left and right ends of the lever guide plate 17, and the shaft 17 a is loosely attached to the outer end of a horizontally long slot 19 a provided in the upper part of the lever 19. The lever 19 is pivotally attached to the bar receiver 5 so as to be rotatable about a shaft 19c, and the shaft 5a provided in the bar receiver 5 and a slightly bent long hole 19d are loosely attached, and the lower end is an inner pipe. 7 and is pivotally attached to the upper end of a positioning rod 21 provided on the inner side of the inner pipe 7 by a shaft 19b. The positioning rod 21 is provided with a fulcrum 21 a at a part in contact with the inner side of the inner pipe 7, and a lower end is a fitting pin 23. The fitting pin 23 protrudes from a hole 7 a formed in the inner pipe 7 and is detachably fitted into a locking hole 9 a opened in the outer pipe 9, so that the inner pipe 7 and the outer pipe 9 are relatively connected to each other. The correct position. The locking holes of the outer pipe 9 are opened at 9a, 9b, 9c, 9d, and 9e at positions that are measured in advance so that the height of the bar 3 becomes a height corresponding to the game.

  Each base 11 has a built-in balance weight 31 that is linked to the operation for adjusting the height of the bar 3. The balance weight 31 is provided with a spring 33 fixed to a spring post 34 at one end and a moving pulley 30 at the other end. Reference numeral 25 denotes a wire, one end of which is fixed to the bar receiver 5, and the other end of the end cap via the fixed pulley 27 provided at the lower end of the outer pipe 9, the fixed pulley 29 provided on the end cap 32, and the movable pulley 30. 32.

  The balance weight 31 is always pulled by the spring 33 in the forward direction of the hurdle 1 (the arrow direction in FIG. 2B). When the bar 1 moves upward, the wire 25 fixed to the bar receiver 5 is pulled upward, and the balance weight 31 moves rearward (counter arrow direction in FIG. 2B). On the contrary, when the bar 1 moves downward, the wire 25 moves loosely due to the tension of the spring 33. Since the wire 25 is passed through the movable pulley 30 provided on the balance weight 31, a distance that is half the movement distance of the bar 1 becomes the movement distance of the balance weight 31.

  FIG. 3 is a perspective view illustrating a state where the hurdle according to the present invention is locked, and FIG. 4 is a perspective view illustrating a state where the hurdle is unlocked. A method for adjusting the height of the bar will be described with reference to FIGS.

  When the hand-held portion 15 is pushed upward, the lever guide plate 17 fixed to the hand-held portion 15 moves upward. Then, since the lever 19 is pulled by the shaft 17a, the lever 19 rotates about the shaft 19c so that the shaft 19b moves inward. When the shaft 19b moves inward, the positioning rod 21 operates so that the fitting pin 23 moves outward with the fulcrum 21a in contact with the inner side of the inner pipe 7 as a fulcrum. Thus, the fitting pin 23 is detached from the hole 7a of the inner pipe 7 and the locking hole 9a of the outer pipe 9, and the lock is released (see FIG. 4).

  If the bar 1 is moved to a desired height and the handle 15 is released while the lock is released, the lever guide plate 17, the lever 19 and the positioning rod 21 return to their original positions. It protrudes from the hole 7a of the inner pipe 7 and is fitted into any of the locking holes 9b to 9e after the movement of the outer pipe 9, and is locked again.

  As described above, “unlocking” is performed by pushing up the hand-held part 15 upward, so that it is possible to shift to the “bar movement” operation as a series of movements and adjust the bar height easily. It becomes.

  The present invention is not limited to the embodiment described above. For example, the number of handheld parts is not limited to two.

  The balance weight may be of any operating mechanism.

  The present invention is utilized for athletics hurdles.

(A) is the partial cross section front view which showed embodiment of the hurdle concerning this invention, (B) is the B section enlarged view. (A) is a partial cross-sectional right side view of FIG. 1, and (B) is an AA cross-sectional view of (A). It is a perspective view explaining the state where the hurdle concerning this invention is locked. It is a perspective view explaining the state where the lock | rock of the hurdle concerning this invention is cancelled | released.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hurdle 3 Bar 5 Bar receiving 5a Shaft 7 Inner pipe 7a Hole 9 Outer pipe 9a Locking hole 9b Locking hole 9c Locking hole 9d Locking hole 9e Locking hole 11 Base 13 Connection pipe 15 Hand-held part 16 Spring 17 Lever guide Plate 17a shaft 19 lever 19a long hole 19b shaft 19c shaft 19d long hole 21 positioning rod 21a fulcrum 23 fitting pin 25 wire 27 fixed pulley 29 fixed pulley 30 moving pulley 31 balance weight 32 end cap 33 spring 34 spring post 35 column

Claims (3)

A hurdle having a bar, an upper column supporting the bar, and a lower column supporting the upper column, wherein the upper column is movable up and down relative to the lower column;
A hand-held portion that is provided at the bottom of the bar and can move up and down to enter and exit the bar;
A locking portion for fixing a relative position between the upper column and the lower column;
When the hand-held portion is pressed against the bar, the relative position between the upper strut and the lower strut is released, and when the hand-held portion is pressed against the bar, the position is fixed. A hurdle comprising an operation mechanism for operating the locking portion.   2. The hurdle according to claim 1, wherein the operating mechanism is an operating mechanism that converts the vertical movement of the hand-held portion into a horizontal movement of the locking portion.   The hurdle according to claim 1 or 2, wherein the upper support column is slidably provided in the lower support column.

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