JP2002346018A - Takeoff board box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change over to a service state in which a takeoff board and a foul determining board are exposed to a field surface and to a non-use state in which a cover is exposed to the field surface. SOLUTION: The upper part of a box body 4 is provided with a support member 5 provided with the takeoff board 1 and foul determining board 2 placed almost flush with the field surface 3, or a support member 5 that can install and support the takeoff board 1 and foul determining board 2 almost flush with the field surface 3. The support member 5 is provided rotatably inside the box body 4 around a support shaft 6 disposed almost horizontally at the upper part of the box body 4. The support member 5 is so constituted that a cover member 7 provided on the back side of the support member 5 is exposed almost flush with the field surface 3 when the support member 5 is reversed by 180 deg. from a service state in which the takeoff board 1 and foul determining board 2 are exposed to the field surface 3, or that the cover member 7 for closing the box body 4 can be installed on the back side of the support member 5 almost flush with the field surface 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried state in a long jump or triple jump competition field such as an athletics stadium, and a level crossing plate and a foul judgment plate are grounded on the upper part in a state substantially flush with the field surface. It relates to a crossing board box that can be used.

[0002]

2. Description of the Related Art As shown in FIG. 11, a level crossing plate 22 and a level crossing plate 22 are provided in front of a sandbox 21 as shown in FIG. Foul judgment board on sandbox 21 side from 22
23 (rubber plates) are arranged side by side, and the competitor jumps by crossing so as not to exceed the railroad crossing plate 22 (to avoid fouling).

In general, the railroad crossing board 22 and the foul determination board 23 are installed in a box 24 called a railroad crossing board box 24 buried in the field (FIG. 12).
This crossing board box 24 can be removed (stored in a warehouse or the like) by removing the crossing board 22 and the foul judgment board 23 when not competing. Has a structure in which a lid 25 (urethane lid) can be stored (see FIG. 13). In the figure, reference numeral 26 denotes a jack for fixing the railroad crossing board 22 in the railroad crossing board box 24, and reference numeral 27 denotes a square bar serving as a mounting base for the foul determination board 23.

[0004] The present invention relates to an improvement of the crossing board box, and it is very easy to change the use state in which the crossing board and the foul determination plate are exposed on the field surface and the non-use state in which the lid is exposed on the field surface. It is intended to provide an epoch-making crossing board box that can be switched.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

An upper opening type crossing board box which is disposed in a buried state in a long jump or triple jump competition field and in which a crossing board 1 and a foul judgment board 2 can be installed substantially flush with the field surface 3 is provided. A support member 5 having the level crossing plate 1 and the foul determination plate 2 which is substantially flush with the field surface 3 is provided above the box body 4, or the level crossing plate 1 and the foul determination plate 2 are provided. A support member 5 that can be installed and supported so as to be substantially flush with the field surface 3 is provided, and the support member 5 is provided on the box body 4 via a support shaft 6 disposed substantially horizontally above the box body 4.
When the support member 5 is turned 180 degrees from the use state in which the level crossing plate 1 and the foul determination plate 2 are exposed on the field surface 3, the support member 5 is provided on the back side of the support member 5. The cover member 7 may be exposed substantially flush with the field surface 3, or the cover member 7 for closing the box body 4 may be installed behind the support member 5 so as to be substantially flush with the field surface 3. The present invention relates to a crossing board box having a fixing mechanism 8 configured as described above and fixing the support member 5 in a state in which it cannot rotate.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

When the fixing mechanism 8 is released and the support member 5 is turned 180 degrees from the use state where the railroad crossing plate 1 and the foul determination plate 2 are installed substantially flush with the field surface 3, the support member 5 The cover member 7 provided on the back side of the cover member 7 is substantially flush with the field surface 3 or the cover member 7 for closing the box body 4 behind the support member 5 exposed on the field side is substantially the same as the field surface 3. It can be installed flush, and this state (non-use state) can be fixed and maintained by the fixing mechanism 8.

At this time, if the railroad crossing plate 1 and the foul determination plate 2 are configured to be detachable from the support member 5, the railroad crossing plate 1 and the foul determination plate 2 are removed from the support member 5, and then the bearing is removed. The member 5 may be turned around.

When the fixing mechanism 8 is released from the non-use state in which the cover member 7 is exposed on the field surface 3 and the support member 5 is turned 180 degrees, the railroad crossing plate provided on the front side of the support member 5 is provided. 1 and the foul determination plate 2 are exposed substantially flush with the field surface 3, or the railroad crossing plate 1 and the foul determination plate 2 are mounted on the front side of the support member 5 exposed on the field side. It can be installed in one state, and this state (use state) can be fixed and maintained by the fixing mechanism 8.

At this time, if the cover member 7 is configured to be detachable from the support member 5, the cover member 7 may be removed from the support member 5, and then the support member 5 may be turned.

Therefore, by simply inverting the support member 5 by 180 degrees, the use state in which the level crossing plate 1 and the foul determination plate 2 are exposed on the field surface 3 and the non-use state in which the lid member 7 is exposed on the field surface 3 This is an epoch-making crossing board box that excels in the workability of switching, which can switch between the two.

Further, for example, if the cover member 7 is attached to the back side of the support member 5 so that the cover member 7 is exposed substantially flush with the field surface 3, a conventional level crossing can be achieved. Lid 25 removed from box 24 when using plate 22
Is often placed temporarily in the corner of the stadium, which is a hindrance to traffic, and moving the lid 25 out of the way is also very heavy (30-40k
g), there is a problem that it is difficult to perform a very troublesome operation.
, The cumbersome work of carrying the heavy lid 25 is not required at all, making it more practical.

Further, for example, the support member 5 is formed in a box shape so that the railroad crossing plate 1 and the foul determination plate 2 can be installed and supported in the box-shaped support member 5 in a side-by-side state. And at least this bearing member 5
If the railroad crossing plate 1 is fixed to the support member 5 so as to be able to rotate together with the support member 5, the railroad crossing plate 22 and the foul determination plate 23 are conventionally connected to a warehouse or the like when a game is played. Must be returned to the storage place after the competition, and this work is very troublesome, especially because the railroad crossing board 22 is heavy. According to this configuration, at least the railroad crossing board 1 Since it is fixed to the support member 5, a cumbersome operation for carrying the heavy railroad crossing plate 1 is not required at all, and it becomes more practical.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

In this embodiment, an upper opening type is provided which is buried in a long jump or triple jump competition field, and in which a crossing board 1 and a foul judgment board 2 can be installed substantially flush with the field surface 3 above. And a support member 5 which can be installed and supported on the box body 4 so that the level crossing plate 1 and the foul determination plate 2 are substantially flush with the field surface 3. The support member 5 is rotatably provided in the box body 4 via a support shaft 6 disposed substantially horizontally above the box body 4, and the railroad crossing plate 1 and the foul determination plate 2 are connected to a field surface. The cover member 7 attached to the back side of the support member 5 is exposed to be substantially flush with the field surface 3 when the support member 5 is turned 180 degrees from the use state exposed at 3. The support member 5 The railroad crossing plate 1 and the foul determination plate 2 are arranged side by side in the box-shaped support member 5 so that they can be installed and supported. The railroad crossing plate 1 is fixed to the support member 5 and is configured to be rotatable together with the support member 5. Rotation rollers 6 </ b> A are provided as the support shafts 6 on both opposite sides of the support member 5. The support member 5 is provided rotatably with respect to the box body 4 by being supported by guide portions 9 provided on inner surfaces of both sides of the box body 4 facing each other. The guide portion 9 moves the roller 6A in the horizontal direction. The support shaft 5 of the support member 5 is horizontally moved with respect to the box body 4 by moving the roller 6A with respect to the guide portion 9 in the horizontal direction. , This spindle 6 By moving the support member 5, the support member 5 can be rotated and inverted at a position where the support member 5 does not come into contact with the box body 4. The present invention relates to a railroad crossing box box provided with:

More specifically, FIGS. 1 to 4 show a first embodiment, and FIGS. 5 to 10 show a second embodiment.

The first embodiment will be described.

The box body 4 of this embodiment has a deeper bottom than the conventional railroad crossing box box and a wider width in the left-right direction in FIG. 1 so that the support member 5 can rotate inside the box body 4. Further, it is configured to be movable in the horizontal left and right directions.

The support member 5 is formed in a box shape so that the railroad crossing plate 1 and the foul determination plate 2 can be installed and supported in the box-shaped support member 5 in a state of juxtaposition. .

Also, the level crossing plate 1 for the support member 5
The installation structure of the foul determination plate 2 is the same as the installation structure in the conventional crossing plate box. The railroad crossing plate 1 is fixed to the support member 5 by the jack 10, and the crossing plate 1 on which the jack 10 is arranged.
A square member 11 serving as a base for installing the foul determination plate 2 is installed in a space on the side, and the foul determination plate 2 is placed on the upper surface of the square member 11. Further, the square members 11 are
It is fixed with screws.

That is, the railroad crossing plate 1, the jack 10, and the square bar 11 are fixed to the support member 5.

The cover member 7 made of urethane having the same quality as that of the field surface 3 is attached to the back side of the support member 5, and the support member 5 is turned 180 degrees. 7 is configured to be exposed substantially flush with the field surface 3.

Further, a rotating roller 6A as the support shaft 6 is provided on both sides of the support member 5 on the near side and the back side in the drawing. The roller 6A is an intermediate portion of both sides of the support member 5 in the left-right direction in the drawing, and
When the support member 5 is rotated about the roller 6A as a shaft, the railroad crossing plate 1 and the lid member 7 are both positioned. It is configured to be exposed substantially flush with the field surface 3.

The support structure of the support member 5 to the box body 4 via the support shaft 6 is such that the roller 6A is supported by guide portions 9 provided on the inner surfaces of both sides of the box body 4 facing each other.

More specifically, on the opposite sides of the box body 4 on the front side and the back side in the drawing, a shaft supporting recess 9A opening upward is provided.
Are provided so as to protrude outward, and the roller 6A is inserted into and supported by the shaft supporting recess 9A from above.

Although not shown, the shaft supporting recess 9A is not shown.
In the upper opening, a cover for a spindle, which is substantially flush with the field surface 3, is closed so as to be detachable and openable. That is, the support member 5 is removed by removing the support cover.
Can be removed from inside the box body 4 so that maintenance can be performed.

The support shaft 6 of the support member 5 is provided so as to be movable in the horizontal direction with respect to the box body 4, and the support member 5 is brought into contact with the box body 4 by moving the support shaft 6. It is configured to be able to rotate and invert at a position where it does not.

Specifically, the shaft supporting recess 9A is formed in a shape having a length in the left-right direction in the drawing, and the roller 6A rolls in the shaft supporting recess 9A which is long to the left and right, so that the bearing member 5 is formed. Is provided so as to be movable in the horizontal direction with respect to the box body 4.

Further, in this embodiment, a spherical operation handle 12 is protruded from both left and right ends of the support member 5 so that the support member 5 can be rotated and inverted while holding the operation handle 12. are doing.

On the other hand, a fitting recess 13 into which the operating handle 12 can be fitted and inserted is formed in the inner surface of the box body 4 on the right side of the drawing. The support member 5 is moved to the right side of the box body 4 in the drawing. When the operation handle 12 is fitted and locked in the fitting recess 13, the support member 5 is in a non-rotatable state and is maintained in a substantially horizontal state. From this state, the support member 5 is moved to the left side in the drawing via the roller 6A. When the operating handle 12 is fitted into and disengaged from the fitting recess 13, the support member 5 is configured to be in a state where it can be rotated and inverted without contacting the box body 4.

The fixing mechanism 8 of this embodiment is provided with a jack device 8A for fixing the support member 5 in a state in which the support member 5 cannot be rotated in the box body 4.

As shown in FIGS. 1 and 4, the jack device 8A is disposed in the left space portion a of the box body 4 and is stretched in the left space portion a in the left and right direction. The left side surface is pressed, whereby the support member 5 is pressed against the right inner surface in the box body 4 to fix the support member 5 in a non-rotatable state.

In the drawing, reference numeral 14 denotes a locking projection for supporting and locking one side (left side) of the jack device 8A, and 15 denotes a jack support bottom for supporting and locking the other side (right side in the drawing) of the jack device 8A. A case is shown in which the jack device 8A is positioned within the space a by the locking projection 14 and the jack support bottom 15. The jack support bottom 15 is a jack device 8
Due to the height of A, it is formed one step higher than the bottom of the box body 4.

As shown in FIGS. 1 and 4, the bottom of the support member 5 and the upper edge of the support member 5 when the support member 5 is turned 180 degrees are locked on the pressing surface of the jack device 8A. A locking projection 17 for locking the bottom and upper edges of the support member 5 is also formed on the right inner surface of the box body 4. The support member 5 and the support projection 18 hold the support member 5 in an extremely stable horizontal state.

The upper portion of the space a in which the jack device 8A is arranged in the box body 4 is a vacant space, so that the auxiliary lid 16 which is substantially flush with the field surface 3 is attached and detached. It is provided freely.

Next, a method of using the present embodiment will be specifically described.

FIG. 1 shows a non-use state in which the cover member 7 is exposed on the field surface 3 in a substantially flush state. At this time, the foul determination plate 2 is housed in a space a in the box body 4 in which the jack device 8A is arranged.

In this state, the auxiliary lid 16 is removed, the jack device 8A is loosened, and the jack device 8A and the foul determination plate 2 are taken out of the box body 4.

Next, as shown in FIG. 2, the support member 5 is slid to the left side in the drawing by holding the operation handle 12 on the left side of the drawing, and the operation handle 12 on the right side of the drawing is fitted to the fitting recess 13.
From the bearing member 18 with respect to the bearing projection 18.
Release the lock on the upper edge.

Next, as shown in FIG.
Holding member 5 via support shaft 6 (roller 6A)
Is rotated and turned 180 degrees to expose the railroad crossing plate 1 on the field surface 3.

Then, the support member 5 is slid to the right side in the drawing to engage and lock the operation handle 12 into the fitting recess 13, and the jack device 8A is again moved to the left space a in the box body 4. The strut support member 5 is held so as not to rotate.

Next, the auxiliary lid 16 is set, and
When the foul determination plate 2 is placed thereon, the state of use shown in FIG. 4 is obtained.

When returning from the use state to the non-use state, the auxiliary lid 16 and the foul determination plate 2 are removed, the jack device 8A is loosened, and the jack device 8A is taken out of the box body 4.

Next, in the same manner as described above, the support member 5 is slid to the left side of the drawing by holding the operation handle 12 on the left side of the drawing, and then the support shaft 6 is held while holding the operation handle 12.
(The roller 6A) to rotate the support member 5 so that 1
The railroad crossing plate 1 is exposed on the field surface 3 by being turned by 80 degrees.

The support member 5 is slid to the right in the drawing to engage and lock the operating handle 12 in the fitting recess 13, and the foul determination plate 2 and the jack device are inserted into the space a on the left side in the box body 4 in the drawing. 8A, the supporting device 5 is held so as not to rotate by stretching the jack device 8A, and when the auxiliary lid 16 is installed, the lid member 7 is exposed on the field surface 3 to be in an unused state.

Therefore, in this embodiment, the cover member 7 is attached to the back side of the support member 5 so that the cover member 7 is exposed substantially flush with the field surface 3. In many cases, the lid removed from the box when using the railroad crossing board is temporarily placed in the corner of the stadium, and it is obstructing traffic, and the lid can be moved out of the way. Very heavy (30-40kg)
However, according to the present embodiment, since the lid member 7 is attached to the support member 5, a cumbersome operation for carrying a heavy lid is not required at all. It becomes a railroad crossing box with excellent properties.

The support member 5 is formed in a box shape so that the level crossing plate 1 and the foul determination plate 2 can be installed and supported in the box-shaped support member 5 in a state where they are juxtaposed. Since the railroad crossing plate 1 supported by the support member 5 is fixed to the support member 5 so as to be able to rotate together with the support member 5, conventionally, the railroad crossing plate and the foul determination plate are used when performing a game. This work had to be taken out of a storage place such as a warehouse and returned to the storage place after the competition, and this work was very troublesome, especially because the railroad crossing board was heavy. Since the plate 1 is fixed to the support member 5, a troublesome work of carrying the heavy railroad crossing plate 1 is not required at all.

The support shaft 6 of the support member 5 is provided so as to be movable in the horizontal direction with respect to the box body 4.
Is moved so that the bearing member 5 can be rotated and inverted at a position where it does not come into contact with the box body 4.
An extremely practical level crossing box box that can be rotated without contacting the support member 5 with the box body 4 without fail. In addition, the support shaft 6 is rotated on both sides of the support member 5 opposite to each other. A roller 6A is provided.
A is supported by guide portions 9 provided on the inner surfaces of both sides of the box body 4 opposite to each other, so that the support member 5 is rotatably provided with respect to the box body 4.
A is configured to be able to support movably in the horizontal direction,
Since the support shaft 6 of the support member 5 is provided so as to move in the horizontal direction with respect to the box body 4 by moving the roller 6A in the horizontal direction with respect to the guide portion 9, the support shaft 6 movable in the horizontal direction is provided. This makes it possible to design and realize the structure of the railroad crossing easily and with a configuration that is extremely practical.

Further, since the jack mechanism 8A for fixing the support member 5 in a non-rotatable state is provided in the box body 4 to constitute the fixing mechanism 8, the fixing mechanism 8 can be designed and realized easily. It becomes a very practical level crossing board box.

Next, a second embodiment will be described.

This embodiment is different from the first embodiment in that two rollers 6A are provided on both sides of the support member 5 opposite to each other, and the two rollers 6A are supported by the guide portion 9. In this case, the support member 5 does not rotate with respect to the box body 4 by its own weight.

More specifically, as shown in FIG.
Rollers 6 are provided on the left and right sides of the front and rear sides of the drawing.
A is provided.

Further, the guide portion 9 (the shaft supporting recess 9) of this embodiment is used.
A) is such that the two rollers 6A provided on one side of the support member 5 can be supported, and the two rollers 6A have a lateral width that enables sliding movement in the lateral direction in the drawing. It is formed longer in the left-right direction than the shaft supporting recess 9A of the first embodiment. In addition, this shaft supporting recess 9A is
The side wall portion on the left side of the drawing is formed as an inclined surface that is inclined leftward toward the top.

In this embodiment, a mountain-shaped climbing projection 19 is provided in the middle of the shaft supporting recess 9A on the right side in the drawing.

More specifically, by moving the support member 5 to the left side of the drawing, when the roller 6A on the right side of the drawing passes over the overhang projection 19, the operating handle 12 is disengaged from the fitting recess 13 and is disengaged. The position at which the overhang projection 19 is formed is set and configured so that the rotation operation of the projection 5 can be performed.

Also, in this embodiment, similarly to the first embodiment, a shaft cover (not shown), which is substantially flush with the field surface 3, is provided at the upper opening of the shaft supporting recess 9A. It is configured to be detachably opened and closed. Note that, in the configuration of the present embodiment in which two support shafts 6 are provided on one side of the support member 5, when the support member 5 is turned over, the shaft support recess 9A is used.
Since the roller 6A, which is not necessarily the rotation axis (left side in the drawing), is projected upward, the supporting member 5
When the rotation is reversed, the spindle cover is removed.

Further, one of the two rollers 6A provided on the left and right portions on one side of the support member 5 as described above.
Is not required to be a deep box body 4 as in the first embodiment. In this embodiment, the depth of the bottom of the box body 4 is substantially the same as the jack support bottom 15. It is formed at the shallow bottom which has the same depth.

In this embodiment, a case is shown in which U-shaped rods are attached to both left and right ends of the support member 5, and the U-shaped rod is used as the operation handle 12.

Next, a method of using the present embodiment will be specifically described.

FIG. 5 shows a non-use state in which the cover member 7 is exposed on the field surface 3. In this embodiment, a case is shown in which a storage portion 16A for storing the foul determination plate 2 is provided below the auxiliary lid 16, and in this drawing, the foul determination plate 2 is stored in the storage portion 16A. The configuration is as follows.

In this state, as shown in FIG. 6, the auxiliary lid 1 and the spindle lid (not shown) are removed, and the jack device 8A is loosened.
From the space part a of FIG.

Next, for example, as shown in FIG. 7, a hand hook 20 is hooked on the operation handle 12 (U-shaped rod) on the left side of the drawing, and the support member 5 is slid to the left side of the drawing by the hand hook 20. The operation handle 12 of FIG. 1 is fitted into and removed from the fitting recess 13 and the left wall surface of the shaft supporting recess 9A is formed on an inclined surface. The support member 5 moves as indicated by an arrow, and the support member 5 is in an oblique state in which the left side in the drawing is located upward.

Next, as shown in FIG. 8, by lifting the hook 20 upward, the support member 5 is rotated upward via the support shaft 6 (roller 6A) on the right side of the drawing. The stopper 19 is a temporary stopper that prevents the right roller 6A on the right side of the drawing from moving to the right side of the drawing over the overhanging projection 19, so that the support member 5 can be easily rotated and inverted. Then, when the roller 6A on the right side of the drawing, which is the support shaft 6, is moved to the left side in the drawing as shown by the arrow in the drawing and turned 180 degrees, the railroad crossing plate 1 is exposed on the field surface 3 as shown in FIG. Become.

Then, the support member 5 is slid to the right in the drawing to engage and lock the operation handle 12 in the fitting recess 13, and the jack device 8 A is again placed in the left space a in the box body 4. The supporting member 5 is arranged so as to be stretched and held so as not to rotate.

Next, when the auxiliary lid 16 and the support lid (not shown) are installed and the foul determination plate 2 is placed on the square bar 11, the use state shown in FIG.

When returning from the use state to the non-use state, the auxiliary lid 16, the spindle lid and the foul determination plate 2 are removed, the jack device 8 A is loosened, and the jack device 8 A is moved to the box body 4. From the space part a of FIG.

Next, in the same manner as described above, the support member 5 is slid to the left in the drawing, and the operation handle 12 on the right side of the drawing is fitted and disengaged from the fitting recess 13, and the support member 5 is supported via the support shaft 6 (roller 6A). 5 is rotated and turned 180 degrees to expose the railroad crossing plate 1 on the field surface 3.

The support member 5 is slid to the right side of the drawing to engage and lock the operating handle 12 in the fitting recess 13. The jack device 8A is inserted into the space a on the left side of the box body 4 in the drawing.
When the auxiliary lid 16 accommodating the foul determination plate 2 is installed in the accommodating portion 16A after holding the support member 5 so as not to rotate by stretching the jack device 8A, the lid member 7 is attached to the field surface 3. Is exposed and becomes a non-use state.

Therefore, in this embodiment, the roller 6A
At least two or more rollers are provided on opposite sides of the support member 5 on one side, and the two or more rollers 6A on one side are supported by the guide portion 9 so that the support member 5 weighs itself against the box body 4. And so that the support member 5 does not rotate freely by its own weight with respect to the box body 4. Become.

The present invention is not limited to the present embodiment, and the specific configuration of each component can be appropriately designed.

[0072]

Since the present invention is constructed as described above, the use state in which the railroad crossing plate and the foul determination plate are exposed on the field surface simply by inverting the support member by 180 degrees, and the lid member is exposed on the field surface. This is a breakthrough box box that excels in switching workability and can be switched to a non-use state.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an unused state of a first embodiment.

FIG. 2 is an explanatory view showing a state in which an auxiliary lid and a jack device have been removed from the state of FIG. 1 and a support member has been slid.

FIG. 3 is an explanatory view showing a state in which a support member is rotated from the state in FIG. 2;

FIG. 4 is an explanatory diagram showing a use state of the first embodiment.

FIG. 5 is an explanatory diagram showing a non-use state of the second embodiment.

FIG. 6 is an explanatory view showing a state in which the auxiliary lid has been removed from the state of FIG. 5 and the jack device has been loosened.

FIG. 7 is an explanatory view showing a state in which the jack device is removed from the state of FIG. 6 and the support member is slid.

FIG. 8 is an explanatory view showing a state in which the support member is rotated from the state of FIG. 7;

9 is an explanatory view showing a state in which the support member is further rotated from the state in FIG. 7 and the support member is turned 180 degrees from the state in FIG. 6;

FIG. 10 is an explanatory diagram showing a use state of the second embodiment.

FIG. 11 is an explanatory view showing a competition field provided with a conventional crossing box.

FIG. 12 is an explanatory diagram showing a use state of a conventional example.

FIG. 13 is an explanatory diagram showing a non-use state of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crossing board 2 Foul judgment board 3 Field surface 4 Box body 5 Bearing member 6 Support shaft 7 Lid member 8 Fixing mechanism

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Nakata 1-4-1, Taishido, Setagaya-ku, Tokyo Inside Hasegawa Sports Facilities Co., Ltd. (72) Inventor Katsuaki Tomaru 1-4-1, Taishido, Setagaya-ku, Tokyo No. Within Hasegawa Sports Facilities Co., Ltd.

Claims (1)

[Claims] An upper opening type crossing board box which is disposed in a buried state in a long jump or triple jump competition field, and in which a crossing board and a foul determination board can be installed substantially flush with the field surface. On the upper part of the box body, a support member provided with the level crossing plate and the foul determination plate that is substantially flush with the field surface is provided, or the level crossing plate and the foul determination plate are substantially flush with the field surface. Provide a support member that can be installed and supported
The support member is rotatably provided in the box body via a support shaft disposed substantially horizontally above the box body, and the support member is used in a state where the level crossing plate and the foul determination plate are exposed from the field surface. Is turned 180 degrees,
A cover member provided on the back side of the support member is exposed substantially flush with the field surface, or a cover member for closing the box body is installed on the back side of the support member substantially flush with the field surface. And a fixing mechanism for fixing the support member in a state in which the support member cannot rotate.