JPH10192571A - Height adjustable hurdle for track event - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hurdle for a hurdle race for both men and women. SOLUTION: Multiple setting parts 1 are fixed to an obstacle pond wall 100, and multiple struts 3, which are hollow and long in lengthwise direction, are fitted into the setting parts 1 to ascend and descend. Connecting parts 7, which are hollow and long in sideways direction, are fixed between the strut parts 3, and a sideways-long bar body 9 are fixed on the strut parts 3. A screw jack is contained in each strut part 3, a screw jack body 11 (an ascending- descending member) is fixed to the strut part 3 and the bar body 9, and the screw shaft 13 (a fixed member) of the screw jack is fixed to the setting part 1. A side ways-long rotating connecting shaft 17 is contained in each connecting part 7 to connect a horizontal rotation input shaft of each screw jack body 11 through the connecting shaft 17. When the rotation input shaft of one screw jack body 11 is rotated, all the screw jack bodies 11 simultaneously ascend and descend by an equal amount to raise and lower the bar body 9, maintaining the bar horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an up-and-down obstacle bar for athletics, which is installed in an obstacle pond (water moat) or the like of an athletics stadium.

[0002]

2. Description of the Related Art In athletics competitions, the height of obstacle bars installed in obstacle ponds (water moats) is specified to be 914 mm for boys and 762 mm for girls. Although different, conventional obstacle bars are available for boys and women, and in the form of attaching and detaching pillars to the concrete wall surface of the obstacle pond via bolts, etc., as appropriate. Was to be replaced.

[0003]

If separate obstacle bars are used for men and women as in the prior art, replacement work is complicated, and a large space is required to store the removed obstacle bars. And other problems.

The present invention has been made in view of such a conventional problem,
It is intended to provide an athletics lifting obstacle bar that can be used in both men's and women's disability competitions.

[0005]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
A plurality of screw jacks or rack jacks comprising a horizontally long bar main body and a plurality of installation parts, and having a fixing member and a vertically moving member which are relatively moved in a vertical direction by rotation of a horizontal rotation input shaft, the fixing member is provided in the installation part. , The lifting member is provided fixed to the bar body,
A horizontally long rotation connection shaft is provided by mutually connecting the rotation input shafts of the screw jacks or rack jacks.

[0006] A plurality of vertically elongated hollow columns are fixed below the bar body, and are fitted to the respective installation portions so as to be vertically movable. It is preferable to be stored inside the support portion, and it is preferable that the horizontally long connecting portion is fixed between the installation portions or the support portions, and the rotating connection shaft is stored inside the connection portion.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. In the drawing, 1 is a stainless steel installation part, 3 is a stainless steel support, 7 is a stainless steel connection part, 9 is a wooden bar body, and it is on the concrete wall 100 of the obstacle pond. A plurality of installation sections 1, 1,
1 is fixed via bolts, the horizontally long bar body 9 is supported by the installation portions 1, 1, 1 via a plurality of columns 3, 3, 3, and the columns 3, 3, 3 are connected to the connecting portion 7, 7 are interconnected.

The installation portion 1 is formed in a hollow vertical rectangular tube having an open upper surface, and the support portion 3 is formed in a hollow vertical rectangular tube having an open upper and lower surface. The lower part is slidably fitted in the installation part 1 up and down. The bar body 9 is fixed to the upper end of the column 3, and a screw jack is stored inside the column 3.

In the screw jack, a horizontal rotation input shaft 12 is provided in a main body 11 so as to protrude outward at both side ends, and a vertical nut rotates the rotation input shaft via a worm gear or the like. The vertical screw shaft 13 is provided so as to protrude downward from the main body 11 so as to move up and down relative to the main body 11 when the nut in the main body 11 rotates. . The screw jack is fixed to the installation section 1 via the downward extension member 15 using the screw shaft 13 as a fixing member, and is fixed to the column 3 and the bar main body 9 using the main body 11 as an elevating member.

[0010] The connecting portion 7 is formed in the shape of a hollow horizontally long rectangular cylinder having both sides opened, and the main body 1 of the screw jack is provided.
1, both ends of the connecting portion 7 are supported by the support portions 3, 3
And connecting holes are formed in the side surfaces of the columns 3 and 3. A horizontally long rotary connecting shaft 17 is stored inside the connecting portion 7, and both ends of the rotary connecting shaft 17 are connected to the main body 11 of the screw jack inside the columns 3, 3 through the connecting holes. , 11 are connected to the rotary input shafts 12, 12.

In addition, an inspection hole is provided at the front of each pillar 3 so as to be openable and closable via a cover 5 at a position corresponding to the position of the main body 11 of the screw jack. An operation hole is provided on the side surface via a lid 4 so as to be freely opened and closed.

In the athletics elevating obstruction bar constructed as described above, the lid 4 of the operation hole of the column 3 is opened, and the detachable operation handle 19 is attached to the rotary input shaft 12 of the main body 11 of the screw jack. When engaged and rotated, the rotation connection shaft 17,
17, all the screw jack bodies 11, 11, 1
One rotation input shaft 12, 12, 12 rotates simultaneously by the same amount,
Since the main bodies 11, 11, 11 of all the screw jacks are simultaneously raised and lowered by the same amount, the horizontally long bar main body 9 can be suitably raised and lowered to a predetermined height while being kept horizontal.

Therefore, the height of the bar main body 9 can be easily adjusted to the prescribed heights for a boy's obstacle competition and a girl's obstacle competition, and complicated replacement work like the conventional obstacle bar can be performed. It becomes unnecessary. Further, at the time of practice of obstacle competition, it is possible to make the height of the bar body 9 lower or higher than the prescribed height. For example, if a player flies higher than necessary, the height of the bar body 9 may be made higher than the prescribed height. You can practice with lowering.

The main body 11 of the screw jack, the screw shaft 13 and the rotary connecting shaft 17 are respectively composed of the column 3 and the connecting portion 7.
The movable part is stored in the inside, so that the movable part is not exposed to the outside, so that the safety at the time of the elevating operation is improved, and the screw jack and the rotary connecting shaft 17 can be prevented from being stained.

In the above-described embodiment, the screw jack main body 11 is used as an elevating member, and the screw shaft 1 of the screw jack is used.
Although the case where 3 is a fixing member has been described, the main body of the screw jack may be fixed to the installation portion as a fixing member, and the screw shaft of the screw jack may be fixed to the bar main body as an elevating member. In this case, the main body of the screw jack can be stored inside the installation part, the connecting part is fixed between the installation parts, the rotary connecting shaft is stored in the connecting part, and the rotation input shaft of the main body of the screw jack is mutually connected. Can be connected.

[0016]

As described above, the lift bar for athletics according to the present invention is relatively moved vertically between the horizontally long bar body and the plurality of installation portions by the rotation of the horizontally rotating input shaft. A plurality of screw jacks or rack jacks having a fixing member and an elevating member to be fixed, the fixing member is fixed to the installation portion, the elevating member is fixed to the bar main body, and the horizontally long rotary connection shaft is fixed to each screw. Since the rotation input shafts of the jacks or rack jacks are connected to each other, when the rotation input shaft of one screw jack or rack jack is rotated, the lifting members of the plurality of screw jacks or rack jacks move up and down by the same amount at the same time. Therefore, the bar main body can be suitably raised and lowered to a predetermined height while being kept horizontal. Therefore, the height of the bar main body can be easily adjusted to the prescribed height for each of a boy's obstacle competition and a girl's obstacle competition, and a complicated replacement work like the conventional obstacle bar becomes unnecessary. Further, at the time of practicing the obstacle competition, the height of the bar main body can be made lower or higher than a prescribed height.

Further, a plurality of vertically elongated hollow columns are fixed to the lower portion of the bar body, and are provided so as to be vertically movably fitted to the respective installation portions, and a lifting member for a screw jack or a rack jack is provided. By storing the screw jack or the rack jack, it is possible to improve the safety at the time of the elevating operation and prevent the screw jack or the rack jack from becoming dirty.

Further, by providing a hollow horizontally long connecting portion fixed between the installation portion or the support portion and storing the rotary connecting shaft inside the connecting portion, the safety at the time of the elevating operation is improved,
It is possible to prevent the connection shaft from becoming dirty.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an athletics elevating obstacle bar according to the present invention.

FIG. 2 is an enlarged view of FIG.

FIG. 3 is a side view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Installation part 3 Prop part 4 Operation hole cover 5 Inspection hole cover 7 Connecting part 9 Bar main body 11 Screw jack main body (elevating member) 12 Rotation input shaft 13 Screw shaft (fixing member) 15 Lower extension member 17 Rotation connection shaft 19 Operation handle 100 Obstacle pond wall

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoki Fukumitsu 3-14-8 Yushima, Bunkyo-ku, Tokyo Inside Chuko Engineering Co., Ltd.

Claims (3)

[Claims] A plurality of screw jacks or rack jacks having a horizontally long bar main body and a plurality of installation portions, and having a fixing member and a vertically moving member which are relatively moved in a vertical direction by rotation of a horizontal rotation input shaft; A member is fixed to the installation portion, and the elevating member is fixed to the bar main body, and a horizontally long rotation connection shaft connects the rotation input shafts of the screw jacks or rack jacks to each other. A lift bar for athletics. 2. A plurality of vertically elongated hollow columns are fixed below the bar main body, and are provided so as to be vertically movably fitted to respective installation portions, and a lifting member of a screw jack or a rack jack is provided. The athletics lifting obstacle bar according to claim 1, which is stored inside the support portion. 3. The athletics elevating type elevating type as claimed in claim 1, wherein the hollow horizontally long connecting portion is fixed between the installation portion or the support portion, and the rotating connecting shaft is stored inside the connecting portion. Obstacle bar.