JP2001087412A - Takeoff board for gymnastics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety of a gymnast at the time of jumping. SOLUTION: Upper and lower boards 11 and 12 to be linked while overlapping rear parts, a compression spring 21 interposed between the front parts of the upper board 11 and the lower board L12 and a regulating board 31 to be linked by respectively overlapping front and rear parts on the lower surface of the upper board 11 and the upper surface of the lower board 12 are combined. The regulating board 31 regulates the oscillating direction of the upper board 11 at the time of step-in rightly downward, prevents the lateral torsion of the upper board 11 and can stabilize the supporting direction of jumping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level crossing plate for gymnastics, which can further improve safety during use.

[0002]

2. Description of the Related Art When performing gymnastics such as a jump box and a balance beam, a jumping crossing plate may be used (for example, Japanese Patent No. 2592227).

In this device, a rear portion of an upper plate and a lower plate are overlapped and connected, and a compression spring is interposed at a front portion of the upper plate and the lower plate. A strong leaf spring is incorporated between the upper plate and the lower plate. The front portion of the leaf spring is connected to the lower surface of the upper plate via an elastically deformable cylindrical cushioning material, and the lower portion is connected to the lower portion. It is connected to the upper surface of the plate by overlapping. Therefore, when the upper plate is lightly stepped on, the jumping of the player can be assisted through the cushioning material and the compression spring. , Can help the player jump more powerfully.

[0004]

According to the prior art, the upper plate is supported via a cushion material and a compression spring which are easily elastically deformed. The upper board may be twisted left and right with respect to the lower board, so that the assisting direction of the jump may swing right and left, and there is a problem that the safety of the player may be impaired.

In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a regulating plate for connecting the front part and the rear part by overlapping them with the lower surface of the upper plate and the upper surface of the lower plate. An object of the present invention is to provide a level crossing board for gymnastics that can stabilize a jumping assist direction and improve athlete's safety by superimposing and connecting a middle part of an upper board.

[0006]

In order to achieve the above object, a first invention according to the present application comprises an upper plate and a lower plate having a rear portion overlapped and connected, and a front portion of the upper plate and the lower plate. The gist of the present invention is to provide a compression spring to be interposed, and a regulating plate for connecting the front part and the rear part by overlapping them on the lower surface of the upper plate and the upper surface of the lower plate, respectively.

[0007] The regulating plate can have elasticity to assist the compression spring.
Each can be fitted with a non-slip.

[0008] The structure of the second invention comprises an upper plate, a lower plate for connecting a rear portion thereof by being overlapped with a lower surface of an intermediate portion of the upper plate, and a compression spring interposed at a front portion of the upper plate and the lower plate. Is the gist.

The lower surface of the lower plate may be provided with a non-slip on the lower surface of the front portion and the lower surface of the rear portion of the upper plate.

Further, in the first and second aspects of the invention, the compression spring can be mounted between the upper plate and the lower plate via a holder, and a mat can be attached to the upper surface of the upper plate.

[0011]

According to the structure of the first aspect of the invention, the front and rear portions of the regulating plate are connected to the lower surface of the upper plate and the upper surface of the lower plate so as to overlap with each other. Even if it is unbalanced, it is possible to effectively prevent the upper plate from being twisted left and right, and thereby the assisting direction of the jump from swinging left and right. The lower plate may be a pair of two upper and lower plates that are divided into two parts on the left and right, or a single plate of the same width as the upper plate may be used.

Since the regulating plate has elasticity for assisting the compression spring, the upper plate can be urged upward together with the compression spring, and the jump assisting performance can be further enhanced.

[0013] If a non-slip is provided on the lower surface of the lower plate, the lower plate does not move accidentally when the player jumps.

According to the structure of the second aspect, the lower plate is connected to the lower surface of the intermediate portion of the upper plate, and the upper plate is uniformly reinforced to the left and right. Can be. In this case, the lower plate is a single plate having the same width as the upper plate, and has elasticity to assist the compression spring.

The upper plate and the lower plate can be prevented from inadvertent movement by providing a non-slip on the rear lower surface and the front lower surface, respectively.

If the compression spring is mounted via the holder, the compression spring can be stably positioned at the front portions of the upper plate and the lower plate, and does not accidentally come off when jumping. The compression spring can be easily replaced by disconnecting the upper plate and the lower plate, or widening the interval between the two, so that an appropriate biasing force can be realized according to the game. The compression spring may be prevented from coming off from the holder via the clamp member.

By providing a mat on the upper surface of the upper plate, the upper surface can be prevented from slipping and a good appearance can be obtained. If a cushion material is provided under the mat, the impact at the time of jumping can be further reduced.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

The crossing boards for gymnastics are upper board 11, lower board 12,
12, the compression springs 21 and 21 and the regulating plate 31 are provided (FIGS. 1 and 2).

The upper plate 11, the lower plates 12, 12 are connected by overlapping the rear portions thereof, and the front portions are open vertically. Each of the lower plates 12, 12 is a plate material whose front portion is curved downward, and non-skids 13, 13 are attached to the front and rear lower surfaces. The upper plate 11 is a plate material that curves gently downward, and includes set screws 11b, 11b,..., And holding plates 11c, 11c.
And are connected to the rear ends of the lower plates 12 and 12 by overlapping (FIGS. 2 and 3). The set screws 11b corresponding to each lower plate 12 are screwed into a common holding plate 11c, and the holding plate 11c is embedded in the lower surface of the lower plate 12. On the upper surface of the upper plate 11, a mat 14 made of felt or the like is attached over the entire surface.

The compression springs 21, 21 are connected to the lower plates 12, 12,
It is interposed at the front of the upper plate 11 (FIGS. 2 and 4). Each compression spring 21 is connected to the upper plate 1 via upper and lower holders 22, 22.
1. Mounted between the lower plates 12. Each holder 22
It is formed in a cylindrical shape that fits the inner diameter of the compression spring 21,
Via the mounting base 22a, the set screws 22b, 22b,.
It is fixed downward and upward to the front lower surface of the upper plate 11 and the front upper surface of the lower plate 12, respectively.

The regulating plate 31 is formed in a substantially S-shape having a width corresponding to the width of the upper plate 11, a rear portion curved upward and a front portion curved downward. The regulating plate 31 has a front portion overlapped and connected to a lower surface of a front portion of the upper plate 11 via a set screw 31a, a holding plate 31b, and a rear portion overlapped with an upper surface of an intermediate portion between the lower plates 12 and 12, respectively. Connected.

The crossing board for gymnastics functions as follows.

The railroad crossing plate is installed and used on the floor F via front and rear slip stoppers 13, 13... (FIG. 1). That is,
When the upper surface of the upper plate 11 is stepped on (in the direction of arrow A in FIG. 1), the upper plate 11 swings downward by shortening the compression springs 21 while bending downward (in the direction of arrow K1 in FIG. 1). At this time, the regulating plate 31 is elastically deformed downward according to the swing of the upper plate 11 (in the direction of the arrow K2 in the figure), and the swing direction of the upper plate 11 is correctly regulated downward, so that the upper plate 11 It effectively prevents twisting and tilting from side to side. Therefore, when the player jumps upward, the upper plate 11 rebounds upward through the compression springs 21, 21, and can correctly assist the jump of the player upward.

In the above description, it is sufficient that the regulating plate 31 can prevent the upper plate 11 from twisting left and right, and it is not always necessary to have elasticity to assist the compression springs 21 and 21. Also, the compression springs 21, 21
Can be removed from the holders 22 and 22 as necessary, and can be replaced with a spring having a different spring constant according to the game. Further, the lower plates 12, 12 may be replaced with a single plate corresponding to the width of the upper plate 11.

[0026]

[Other Embodiments] A clamp member 23 may be attached to each of the upper and lower holders 22 (FIG. 5). Each clamp member 23 is provided with a set screw 22b, 22 of the holder 22.
b, it is fixed on the mounting base 22a, and one end of the compression spring 21 is fixed through the bent portion at the tip. That is, the clamp members 23, 23 can prevent the compression spring 21 from accidentally coming off the holders 22, 22.

On the upper surface of the upper plate 11, a cushion member 15 may be interposed between the upper plate 11 and the mat 14. The cushion material 15 reduces the impact at the time of jumping.

The lower plate 12 may be formed as a single plate having the same width as the upper plate 11, and the rear portion may be connected to the lower surface of the upper plate 11 by being overlapped with the lower surface thereof (FIG. 6). The lower plate 12 is formed in a substantially S shape in which a rear portion is curved downward and a front portion is curved upward. The rear portion of the lower plate 12 is connected to the upper plate 11 via a spacer 16.
, And are connected via set screws 11b, 11b... And a holding plate 11c. However, spacer 1
6 may omit this. At the front of the upper plate 11 and the lower plate 12, compression springs 21, 21 are interposed on the left and right via a pair of upper and lower holders 22, 22,. On the underside of the front part, each
3, 13 are provided on the left and right. In FIG. 6, a set screw 11b, a compression spring 21, and a front and rear slip stopper 1 are shown.
Only one of each of 3, 13 is illustrated.

When the upper plate 11 is depressed and swings downward (in the direction of arrow K3 in FIG. 6), the lower plate 12
1 can be uniformly reinforced to the left and right, and the left and right torsion of the upper plate 11 can be minimized. At this time, the lower plate 12
Has elasticity to assist the compression springs 21 and 21 and is elastically deformed in the direction of arrow K4 in FIG.

In the above description, the upper plate 11 and the lower plate 12
Each of the compression springs 21 interposed in the front part of the
1a may be combined (FIG. 7).

The auxiliary spring 21a includes upper and lower holders 22, 2
2 are formed into a double cylindrical shape, so that the compression spring 21
When the force applied to the upper plate 11 is large, the compression spring 21 can be assisted.
It is preferable that the auxiliary spring 21a is fixedly attached to one holder 22 at one end.

[0032]

As described above, according to the first aspect of the present invention, a compression spring is interposed between the front portions of the upper plate and the lower plate which are connected by overlapping the rear portions. By providing a regulating plate that overlaps and connects to the lower surface of the upper plate and the upper surface of the lower plate, the regulating plate correctly regulates the swinging direction of the upper plate when stepping down, and corrects the left and right twist of the upper plate. Since it can be prevented, there is an excellent effect that the assisting direction of the jump of the player who steps on the upper plate is stabilized, and the safety of the player can be greatly improved.

According to the second invention, the rear portion of the lower plate is overlapped and connected to the middle portion of the upper plate, and compression springs are interposed at the front portions of the upper plate and the lower plate. The effect similar to that of the first invention can be obtained by minimizing the twist.

[Brief description of the drawings]

FIG. 1 is a side view of the overall configuration.

FIG. 2 is an exploded perspective view of the entire configuration.

FIG. 3 is an enlarged cross-sectional view corresponding to line XX of FIG. 2;

FIG. 4 is an enlarged cross-sectional view corresponding to the line YY in FIG. 2;

FIG. 5 is a view (1) corresponding to FIG. 4, showing another embodiment.

FIG. 6 is a diagram corresponding to FIG. 1, showing another embodiment.

FIG. 7 is a diagram (2) corresponding to FIG. 4, showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Upper plate 12 ... Lower plate 13 ... Non-slip 14 ... Mat 21 ... Compression spring 22 ... Holder 31 ... Regulatory plate

Claims (7)

[Claims] 1. An upper plate and a lower plate which are connected by superimposing a rear portion, a compression spring interposed at a front portion of the upper plate and the lower plate, and a front portion and a rear portion which are respectively formed on the lower surface of the upper plate and the lower portion. A level crossing plate for gymnastics, comprising: a regulating plate which is superimposed and connected to the upper surface of the plate. 2. The level crossing plate for gymnastics according to claim 1, wherein the restriction plate has elasticity to assist the compression spring. 3. The level crossing board for gymnastics according to claim 1, wherein a slipper is provided on each of a lower surface of a front portion and a lower surface of a rear portion of the lower plate. 4. A gymnastic exercise comprising an upper plate, a lower plate having a rear portion overlapped with and connected to a lower surface of an intermediate portion of the upper plate, and a compression spring interposed at a front portion of the upper plate and the lower plate. Crossing board. 5. The gymnastics level crossing plate according to claim 4, wherein a slip prevention is attached to each of a lower surface of a front portion of the lower plate and a lower surface of a rear portion of the upper plate. 6. The level crossing plate for gymnastics according to claim 1, wherein the compression spring is mounted between the upper plate and the lower plate via a holder. 7. The gymnastics level crossing plate according to claim 1, wherein a mat is attached to an upper surface of the upper plate.