JPH09218145A - Measuring device for athletic field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evaluate the status of the surface of an athletic field at a plurality of positions thereon, always release a ball in the same condition, finely adjust an erection state on the surface of the athletic field, and evaluate a turf or the like at a plurality positions on the athletic field under a uniform condition as well as with high accuracy. SOLUTION: A travel base 2 is fitted with wheels 4 so as to be capable of freely moving on the turf 1 of an athletic field. In addition, the horizontal posture of the travel base 2 can be set with high accuracy via the adjustment of a base level adjustment part 5. A horizontal member 9 is laid on top of a pillar 8, and the end of a suction hose 13 held on the horizontal member 9 is fitted with an adsorbing and holding means 14. In this case, a ball B is held with the adsorbing and holding means 14, and the holding position of the ball B is adjustable via the expansion and contraction of the pillar 8. When negative pressure is released from the adsorbing and holding means 14, the holding status of the ball B is released, and the ball B bounces and springs up from the turf 1. The maximum bouncing level of the ball B is measured via measurement graduations marked on the pillar 8, and the turf 1 is thereby evaluated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game in which a state of a natural grass surface, an artificial grass surface, a soil surface, etc. can be measured in a stadium using a ball such as soccer (football), baseball, cricket, hockey. Field measuring device.

[0002]

2. Description of the Related Art In a stadium where a game using a ball is held, it is necessary to investigate and evaluate the condition of a game scene such as a lawn surface. For example, in a soccer stadium, it is necessary to investigate and evaluate the bouncing and rolling conditions of the ball on the grass. As a method of evaluating the bound state, the ball is dropped from a predetermined height to bounce on the lawn surface, and the bound height is expressed as a ratio to the height of the ball before it falls. It may be expressed by the distance until the ball is stopped by rolling the ball with a predetermined force.

However, conventionally, the above evaluation has been performed manually. For example, in the evaluation of the bound state, a method is adopted in which a person stands on a table and the ball held by the person is dropped toward the grass surface. However, with this method, the height position at which the ball is released cannot be accurately determined, and when the ball is released, a force in the direction of gravity may be applied to the ball by the hand, and a stable ball It has the drawback that it cannot be released.

Further, in the evaluation of the rolling state, a method is adopted in which a person holds the board at an inclination, puts a ball on the board, and rolls it toward the grass surface. However, this method has a drawback that it is difficult to always set the plate at a uniform angle, and the ball cannot be stably released on the plate as in the case of evaluation of the bound state. On the other hand, in artificial turf factories or ball factories, a method of dropping a ball from a certain height on the artificial turf and checking the bound state is also practiced.

[0005]

However, since this type of measuring device is intended to examine the characteristics of the artificial turf or ball immediately after manufacturing, it is fixedly installed as a facility in the factory. , It is not possible to check the actual condition of the lawn surface of the stadium in multiple places using this device. Moreover, since this kind of device evaluates artificial turf and balls of a predetermined standard, the height position of the ball before falling is fixed, and it is suitable for evaluation purposes in actual stadiums. It was impossible to adjust the release position of the ball at the same time.

The present invention solves the above-mentioned problems of the prior art. It is possible to evaluate the condition of the surface of the stadium at a plurality of points on the stadium, and the ball can be released under the same conditions all the time. In addition, we will provide a measuring device for the stadium that enables fine adjustment of the installation condition on the stadium surface and can evaluate the grass surface etc. at multiple points of the stadium under uniform conditions and with high accuracy. Is intended.

[0007]

A measuring device for a stadium according to a first aspect of the present invention comprises a base which has wheels and is movable in the stadium, and a column which is fixed upright on the base. Adsorption holding means provided on the upper part of the pillar for adsorbing and holding a ball used for competition, and measurement for measuring the height of the ball bound on the stadium provided on the base and separated from the adsorption holding means And a scale are provided.

In the above description, the support column is expandable, and the suction hose connected to the suction holding means is supported by rollers at the upper part of the support column so that the height of the suction holding means can be adjusted. Is preferable, and the measuring scale can be provided on the column.

Further, it is preferable to have a structure provided with a level for measuring the horizontality of the supporting portion of the supporting column or for measuring the verticality of the supporting column.

The measuring device for a stadium according to the second aspect of the present invention comprises a base which has wheels and is movable in the stadium, and a base which is inclined with respect to the base and which extends from the upper surface to the surface of the stadium. It is characterized in that an inclined table on which a used ball can be rolled and an adsorption holding means for adsorbing and holding the ball on the inclined table are provided.

In the above invention, it is preferable that the suction holding means is supported along the tilt table so that its installation position can be adjusted.

The first aspect of the present invention is capable of evaluating and measuring the bound state of a ball on a lawn surface of a stadium or the like. In this measuring device, wheels are provided on a moving base so as to be movable. Therefore, it is possible to evaluate and measure the competition scenes at a plurality of locations by moving the competition scene such as a soccer field at any time. When the moving base is moved to the measurement position, it is preferable that the horizontal level of the moving base can be adjusted with a screw for adjusting the base level. In this case, it is preferable to provide a spirit level for measuring the horizontality of the moving base or a spirit level for measuring the verticality of the support, and adjust the base level based on this spirit level.

Since the moving base is provided with suction holding means for holding the balls by suction, a vacuum pump connected to the suction holding means via a suction hose and a generator for operating the vacuum pump are provided. It can be mounted on the moving base so that it can move together. However, if each of the above devices is mounted on a moving base, the weight on the moving base becomes large, and if there is a risk of damaging the lawn surface when moving by wheels, a vacuum pump and a generator are mounted on the moving base. Instead, it may be carried to the measuring point by a transfer means other than the moving base.

The ball used for measuring the bound is adsorbed and held by an adsorbing and holding means provided on the upper part of the support column, and the adsorbing negative pressure is gradually or momentarily released so that the ball is gravitational force. The ball can be released without applying any external force in any direction, and the conditions for ball release at each measurement position can be kept constant, and the evaluation and measurement of the competition scene at each measurement position can be performed stably under the same conditions. it can.

Further, the column having the suction holding means is expandable and contractable, and the suction hose connected to the suction holding means is supported by the roller at the upper part of the column so that the column can be retracted. By appropriately adjusting the length and the amount of suction hose withdrawn, the height of the suction holding means from the competition scene can be adjusted. With this adjustment,
The height of the ball release position from the competition scene can be set arbitrarily, and the reliability of the evaluation result can be increased by changing the height of the release position in multiple stages to evaluate the competition scene.

Further, by providing a measuring scale for measuring the bouncing height of the ball on the column, it is not necessary to provide a bar for measuring scale separately from the column, and the structure on the moving base can be simplified. The weight of the structure on the moving base can be reduced.

The height of the ball released from the suction holding means when it bounces is measured by using a video camera or the like. The video camera predicts the ascending height position when the ball bounces and installs it near that position, and video-shoots the height at which the ball bounces and the above-mentioned measurement scale located in the background to evaluate the competition scene. To do. Further, it is also possible to determine the height of the ball bound by the naked eye in relation to the measurement scale.

In the stadium measuring device of the second aspect of the present invention, the rolling state of the ball on the surface of the stadium is evaluated or measured.

Also in this measuring apparatus, the moving base has wheels so that it can move in the stadium. Therefore, it is possible to evaluate the lawn surface at multiple points in the stadium. Further, it is preferable that the base level can be adjusted by using a base level adjusting screw or the like at the measurement position, and it is preferable that the moving base is provided with a leveling device for level adjustment.

In this measuring device, the ball is held by the suction holding means installed on the inclined table, and the suction negative pressure is gradually or momentarily released, so that the ball is stably released. Be seen. Therefore, the ball release condition can be made uniform at each measurement point. Also, because the installation position of this suction holding means can be adjusted along the tilt table, the release position on the tilt table can be set arbitrarily, and the ball release position can be set according to the situation of the competition scene. is there.

[0021]

1 is a side view showing a configuration example of a measuring device for a stadium according to a first aspect of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view of a column, and FIG. 4 is a moving base. It is a partial perspective view which shows the bottom part of. In FIG. 1, reference numeral 1 indicates a grass surface of an artificial turf on a soccer field as an example of a competition scene on a stadium.

As shown in FIG. 2, the moving base 2 is assembled by an iron square tube material or an angle material so that the plane has a rectangular shape. 2 on the front and rear of the moving base 2
A wheel support portion 3 is fixed at each of the points, and a wheel 4 is attached to a lower portion of the wheel support portion 3. As shown in FIG. 4, the wheel 4 is a caster, and includes a support shaft 4a rotatably supported in the lower part of the wheel support portion 3 in the direction (a), and a support fixed to the support shaft 4a. Part 4b
And a wheel body 4c rotatably supported by the support portion 4b. Since the supporting portion 4b is rotatable in the (a) direction by the supporting shaft 4a, the moving base 2 can freely move in each direction on the grass surface 1.

Base level adjusting portions 5 are provided at two positions on the left and right of the front portion (end portion on the (d) side) of the moving base 2. As shown in FIG. 4, the base level adjusting unit 5 includes a female screw portion 5a fixed to the bottom of the moving base 2, and a screw shaft 5b screwed to the female screw portion 5a so as to be able to move forward and backward.
Rotation operation part 5c fixed to the lower end of the screw shaft 5b
And a support base 5d rotatably supported with respect to the rotary operation part 5c. When the rotation operation part 5c is rotated in the (b) direction, the screw shaft 5b extends in the axial direction,
The support base 5d can be pressed against the grass surface 1. By pressing the support base 5d against the lawn surface 1, the moving base 2 can be allowed to stand so that it cannot move, and
By adjusting the amount of advance of the screw shaft 5b, the inclination (base level) of the moving base 2 in the stationary state can be adjusted.

As shown in FIG. 2, a level 7 is provided on the upper surface of the column support 6 provided on the moving base 2, and the inclination of the column support 6 and the moving base 2 is the level 7. Can be measured by. Since the tilt adjustment of the moving base 2 by the base level adjusting unit 5 is performed with reference to the level 7, the base level setting has a clear reference and the adjustment accuracy thereof is high. The column support 6
Since the column 8 is fixed vertically, a level may be provided on the column 8 to adjust the base level while measuring the verticality of the column 8 with the level.

As shown in FIG. 2, the moving base 2 is provided with a pair of support rails 2a, 2a extending in the front-rear direction ((d)-(e) direction). It can move along 2a and 2a. Bolts 6a are screwed onto a plurality of places of the column support portion 6, and by tightening the bolts 6a, the column support portion 6 can be fixed at any moving position on the support rails 2a, 2a. There is.

As shown in FIGS. 1 and 3, the support column 8 includes a lower support column 8a fixed to the support column 6 and a middle support column 8b inserted into the lower support column 8a so as to be movable back and forth. Further, it is composed of an upper strut 8c which is inserted into the upper part of the middle strut 8b so as to be able to move back and forth. Lower support 8a
Is provided with a tightening portion 8d by a combination of a bolt and a nut. The tightening portion 8d fixes and fastens the middle strut 8b. By loosening the tightening portion 8d, the height position of the middle strut 8b can be adjusted. Has become. Similarly, a fastening portion 8e formed by a combination of a bolt and a nut is provided on the upper portion of the middle column 8b.
The upper strut 8c is fastened and fixed by the tightening portion 8e, and the height position of the upper strut 8c can be adjusted by loosening the tightening portion 8e.

As shown in FIG. 3, a measuring scale L is attached to the side surface of the middle support column 8b facing forward ((d) direction). The measurement scale L is attached at 1 cm intervals. After the adjustment of the levelness of the moving base 2 by the base level adjusting unit 5 is completed at any measurement point in the stadium, the tightening unit 8d is loosened to adjust the height position of the middle support column 8b. Measuring scale L grass surface 1
It is possible to adjust the height from above, that is, to set the height of the measurement scale L with the grass surface 1 as the zero point.

The height of the horizontal member 9 mounted at a right angle to the upper end of the upper strut 8c is adjusted by loosening the tightening portion 8e provided on the middle strut 8b and adjusting the amount of advance of the upper strut 8c. it can. A measuring scale L is attached to the middle strut 8b, and an upper strut 8c for supporting the horizontal member 9 is provided so as to be able to move back and forth with respect to the middle strut 8b. Therefore, the middle strut set with the grass surface 1 as the zero position. 8b
It is possible to adjust only the height position of the horizontal member 9 without changing the height of the measurement scale L of.

Brackets 11, 11 are provided on the lower surfaces of the front and rear end portions of the horizontal member 9, respectively.
Rollers 12 and 12 are rotatably supported by 1 and 11, respectively. A suction hose 13 is movably attached to the rollers 12 and 12, and a suction holding means (suction plate or suction nozzle) 14 is connected to a tip of the suction hose on the (d) side. The ball B used in the stadium, for example, a soccer ball is held by the suction holding means 14. In addition,
For the suction hose 13, a vacuum pump 1 described later
5, a negative pressure is applied, and the suction holding means 14 moves the ball B
Since the inside of the suction hose 13 has a negative pressure with respect to the outside at the time of adsorbing, the hose material having a large wall thickness or the hose material having the metal coil provided on the inner surface side is used. It is preferable that the suction hose 13 is not easily deformed by the pressure of 1.

The suction hose 1 supported by the roller 12
By winding 3 up, the height h from the roller 12 to the suction holding means 14 can be set. This height h
When the setting of the suction hose 13 is completed, the fixing means (not shown) for fixing the suction hose 13 is the horizontal member 9 or the moving base 2.
It is provided on the top. By adjusting the winding amount of the suction hose 13 and / or adjusting the height position of the upper support column 8c, the height H from the lawn surface 1 to the suction holding means 14 (or the suction holding means 14 holds it). The height to the center of the ball B) can be set arbitrarily. Further, by moving the column support portion 6 along the support rails 2a, 2a, the suction holding means 14
From the position where the ball B falls on the grass surface 1 from (d)-
It can be adjusted in the (e) direction.

The base end of the suction hose 13 is a vacuum pump 1.
5 and the drive power of the vacuum pump 15 is obtained from the engine generator 16. In the configuration example shown in FIG.
The vacuum pump 15 and the generator 16 are provided separately from the moving base 2, and are transported to the measurement position separately from the moving base 2. Therefore, the weight of the structure on the moving base 2 can be minimized, and the lawn can be prevented from being damaged by the pressure of the wheels 4 when the moving base 2 is moved. However, the vacuum pump 15 and the engine generator 16 can be mounted on the moving base 2 when the diameter of the wheel 4 is large and there is no risk of damaging the lawn even when a large weight acts. In the example shown in FIG. 1, the vacuum pump 15 uses motor power, and electric power to this motor is obtained from an engine generator 16 having an internal combustion engine. It is also possible to drive directly.

A method of using the above measuring device for a stadium will be described. In stadiums such as soccer, it is necessary to evaluate the grass surface 1 at multiple points. This stadium measuring device can freely move the moving base 2 by rolling the wheels 4. If the screw shaft 5b of the base level adjusting unit 5 is rotated in the (b) direction in FIG. 4 when the moving base 2 moves to a predetermined measurement location, the support base 5d is pressed against the grass surface 1. As a result, the moving base 2 can be left stationary so as not to move to the measurement location. Further, the horizontal degree of the moving base 2 can be adjusted by finely adjusting the rotation amount of the screw shaft 5b in the (B)-(C) direction. As described above, this adjustment is performed while observing the spirit level 7.

After the levelness of the moving base 2 is determined,
Loosen the nuts and bolts of the tightening portion 8d of the lower strut 8a, adjust the height position of the middle strut 8b, and set the reference position of the measuring scale L provided on this middle strut 8b so that the lawn surface 1 becomes the zero position. Set to. After this setting, the tightening portion 8d is tightened to fix the middle strut 8b. further,
The upper support 8c and the horizontal member 9 are loosened by tightening the tightening portion 8e.
The height H from the lawn surface 1 to the suction holding means 14 is set by adjusting the height position of the suction hose 13 and the length of the suction hose 13.

Next, the vacuum pump 15 is started to bring the suction holding means 14 into a negative pressure state, and the balls B are suction held by the suction holding means 14. At this time, suction hose 1
The length of 3 is adjusted so that the suction holding means 14 is lowered to a height reachable by a person, and the ball B is sucked and held by the suction holding means 14 at that position.
After that, the suction hose 13 may be wound up, and the center position of the ball B held by the suction holding means 14 may be moved from the lawn surface 1 to, for example, 3 m so as to be the measurement position.

When starting the measurement, the vacuum pump 15
The negative pressure amount of the ball B is gradually reduced by the suction holding means 14
Gradually reduce the force of adsorbing. When the suction force becomes weaker than the weight of the ball B, the ball B is released and falls on the grass surface 1. Alternatively, the ball B is released by instantaneously removing the negative pressure applied by the vacuum pump 15. There are two ways of releasing the negative pressure, that is, the method of gradually releasing it as described above and the method of releasing it instantaneously. In any case, when the ball B is released, an external force in the direction of gravity is applied. It is sufficient to set the negative pressure release condition so that it does not occur. The ball B, which falls by its own weight, bounces on the grass surface 1, and this situation is photographed with a video camera from the direction V in FIG. When the video camera is played back, the bound height of the ball B can be measured by comparing the measurement scale L attached to the middle support column 8b with the highest reached position of the bound ball B.

As described above, the ball B is held by the suction holding means 1
4 is sucked and held by the negative pressure, and the ball is released by gradually lowering or releasing the negative pressure momentarily. Therefore, when the ball is released, an external force does not act on the ball B in its own weight direction. . Therefore, the ball is dropped only by its own weight, and the bounce characteristic can be measured with high accuracy. Further, the ball can be released at a plurality of measurement positions under the same condition, and the bound states of a plurality of measurement points can be compared.

FIG. 5 is a side view showing the measuring device for a stadium according to the second aspect of the present invention. The measuring device for a stadium shown in FIG. 5 evaluates the rolling state of the ball B on the grass surface 1 of a stadium such as a soccer field. The moving base 21 has a substantially L-shaped side surface. Wheels 4 having a structure similar to that shown in FIG. 4 are provided at a plurality of positions below the horizontal portion 21a of the moving base 21, and the moving base 21 can be arbitrarily and easily moved to a plurality of measuring points in the stadium. It can be done. Further, in the horizontal portion 21a of the moving base 21,
A base level adjusting unit 5 having the same structure as that shown in FIG. 4 is provided. By adjusting the amount of advance / retreat of the screw shaft 5b of the base level adjuster 5 and pressing the support base 5d provided at the lower end thereof against the grass surface 1, the moving base 21
Can be left stationary so that the horizontal section 2
It is possible to adjust the levelness of 1a. The level part 7 is provided on the horizontal part 21a of the moving base 21, and the base level adjusting part 5 is provided while observing the measurement state of the level level 7.
It is possible to set the horizontal portion 21a in a completely horizontal state by adjusting the amount of advance / retreat of the screw shaft 5b at the step.

The tip of the horizontal portion 21a of the moving base 21,
An inclined table 22 is installed and fixed to the upper end of the vertical portion 21b. A side plate 22a parallel to the upper surface of the tilt table 22
A rolling path for the ball B is formed between the first and the second portions 22a and 22a.
When the horizontal portion 21a of the moving base 21 is adjusted to be in a horizontal posture, the tilt base 22 is installed so as to have a predetermined tilt angle θ with respect to the horizontal. Ramp 22
A flexible sheet 23 extending on the grass surface 1 is provided at the lower end of the ball so that the ball B rolling on the tilt table 22 can smoothly move to the grass surface 1.

At the upper part of the tilt table 22, the suction holding means 14 is provided.
Is provided, and the suction holding means 14 is fixed to the bracket 24. The bracket 24 is fixed to the tilt table 22 by a bolt 25, but when the bolt 25 is loosened, the position of the bracket 24 can be moved in the (e)-(g) direction within a predetermined distance range. By moving the bracket 24, the position of the suction holding means 14 on the inclined table 22 can be adjusted.

The suction hose 13 connected to the suction holding means 14 is a roller 2 provided at the uppermost end of the tilt table 22.
6 is connected to a vacuum pump 15 (not shown in FIG. 5) located outside the moving base 21. In addition, also in FIG. 5, the vacuum pump 15 is attached to the moving base 21.
It is possible to mount the engine generator 16.

In the measuring device for a stadium shown in FIG. 5, the moving base 21 can be moved to an arbitrary measuring position in the stadium by the rotation of the wheels 4, and at the measuring position,
By adjusting the base level adjusting unit 5 and installing the horizontal portion 21a of the moving base 21 horizontally, the angle θ of the tilt table 22 can be set accurately. The ball B can be held by starting the vacuum pump 15 to bring the suction holding means 14 into a negative pressure state. Further, the release position of the ball B can be set by adjusting the position of the bracket 24.

When the negative pressure of the suction holding means 14 is gradually decreased and the component force of the weight of the ball B in the rolling direction overcomes the negative pressure, the ball B is gently released and rolls down the inclined table 22 and the seat. It moves from 23 to the grass surface 1. Alternatively, the negative pressure of the suction holding means 14 is instantly released and the ball B
May be released. Then, by measuring the rolling distance of the ball B on the lawn surface 1, it is possible to evaluate the rolling state of the ball on the lawn surface 1. Also in the measuring apparatus of FIG. 5, the ball B is held by the suction holding means 14, and the suction force is gradually reduced or momentarily released, so that the ball B is quiet without receiving an external force in the (e) direction. Since the ball B is released, it is possible to reliably evaluate the rolling state of the ball B on the grass surface 1.

The present invention can evaluate not only the condition of the lawn surface 1 of natural grass, but also the artificial grass surface, the soil surface and the like. In addition, the stadium is not limited to a soccer field, but can be used in places where various competitions are held such as a baseball field, a cricket field, and a tennis field.

[0044]

As described above, according to the present invention, since the moving base of the measuring device for evaluating the bound state or the rolling state of the ball can be moved to any position by using the wheels, the same measuring device can be used. Can be freely and easily moved to a plurality of measurement areas in the stadium for measurement. Further, by providing a level on the moving base and adjusting the horizontal state of the moving base by the base level adjusting section, it is possible to accurately determine the verticality of the column and the angle of the tilting table.

In the bound state measuring device, the ball release position can be arbitrarily set by expanding and contracting the support column and adjusting the extension amount of the suction hose, and the position of the suction holding means is adjusted on the inclined table. By doing so, it is possible to adjust the rolling release position.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration example of a measuring device for a stadium according to the first invention,

FIG. 2 is a plan view of the measuring device for a stadium according to the first aspect of the present invention;

FIG. 3 is a partial perspective view showing a column of the measuring device for a stadium shown in FIG. 1,

FIG. 4 is a perspective view showing a part of the base of the measuring device for a stadium shown in FIG. 1;

FIG. 5 is a side view showing a configuration example of a measuring device for a stadium according to the second invention,

[Explanation of symbols]

 1 Lawn Surface 2 Moving Base 4 Wheels 5 Base Level Adjusting Part 6 Strut Supporting Part 7 Level 8 Sut 8a Lower Support 8b Middle Support 8c Upper Support 9 Horizontal Member 12 Roller 14 Adsorption Holding Means 15 Vacuum Pump 16 Engine Generator 21 Moving Base 22 Tilt table 24 Bracket for supporting suction holding means

Claims (6)

[Claims] 1. A base that has wheels and is movable in a stadium, and a column that is vertically fixed to the base.
Adsorption holding means provided on the upper part of the pillar to adsorb and hold balls used for competition, and provided on the base,
A measuring device for a stadium, comprising: a measuring scale for measuring the height of a ball that is separated from the suction holding means and bound at the stadium. 2. A support hose that is extendable and retractable, and a suction hose connected to the suction holding means is supported by rollers at the upper part of the support, and the height of the suction holding means can be adjusted. Stadium measuring device according to 1. 3. The measuring device for a stadium according to claim 1, wherein the measuring scale is provided on the support column. 4. The levelness of the support portion of the column can be measured,
4. The measuring device for a stadium according to claim 1, further comprising a spirit level capable of measuring the verticality of the pillar. 5. A base which has wheels and is movable in a stadium, and a tilt table which is provided on the base at a slant and can roll a ball used in the competition from the upper surface to the surface of the stadium. And a suction holding means for holding a ball by suction on the tilt table, a measuring device for a stadium. 6. The measuring device for a stadium according to claim 5, wherein the suction holding means is supported along the tilt table so that its installation position can be adjusted.