EP0310694A1 - Dispositif de récupération des balles de tennis - Google Patents

Dispositif de récupération des balles de tennis Download PDF

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Publication number
EP0310694A1
EP0310694A1 EP87114669A EP87114669A EP0310694A1 EP 0310694 A1 EP0310694 A1 EP 0310694A1 EP 87114669 A EP87114669 A EP 87114669A EP 87114669 A EP87114669 A EP 87114669A EP 0310694 A1 EP0310694 A1 EP 0310694A1
Authority
EP
European Patent Office
Prior art keywords
damping
curtain
collecting
tennis
damping curtain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87114669A
Other languages
German (de)
English (en)
Other versions
EP0310694B1 (fr
Inventor
Josef Baumgartner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE8787114669T priority Critical patent/DE3773935D1/de
Priority to AT87114669T priority patent/ATE68363T1/de
Priority to EP87114669A priority patent/EP0310694B1/fr
Priority to DE8812674U priority patent/DE8812674U1/de
Publication of EP0310694A1 publication Critical patent/EP0310694A1/fr
Application granted granted Critical
Publication of EP0310694B1 publication Critical patent/EP0310694B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B47/00—Devices for handling or treating balls, e.g. for holding or carrying balls
    • A63B47/02—Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting
    • A63B47/025—Installations continuously collecting balls from the playing areas, e.g. by gravity, with conveyor belts

Definitions

  • the invention relates to a device for collecting tennis balls according to the preamble of claim 1.
  • a generic device for conveying tennis balls to a ball throwing machine has become known, for example, from EP-A-0 043 886, in which a horizontal collecting channel is arranged at a predetermined distance above the playing field surface and over its entire, the field width corresponding length, at their Leading edge is connected to an extending to the field surface inclined surface.
  • an endlessly circulating conveyor element is provided, via which the tennis balls take place along the channel to the collection point.
  • a damping wall is mounted on the playing field boundary. This damping wall to catch the Aufparallenergie the impinging tennis balls, so that they fall down into the collecting trough. Since such damping walls substantially only attenuate the kinetic energy of the balls acting perpendicular to the wall surface and the tennis balls very often impinge on the damping wall at an oblique angle and with a twist, a large part of the balls impinging on this known damping wall does not fall into the collecting channel but jump over the trough back to the field back.
  • a damping surface is provided with a rear wall which extends from the back of the trough up to the upper limit of the area in which the substantial portion of the balls impinges, and then as a roof portion forward obliquely.
  • a sub-roof portion is formed which extends obliquely rearwardly and ends at a greater distance from the rear wall.
  • the rear damping wall may consist of a non-elastic textile fabric extending between correspondingly shaped supports. In practice, however, has shown that such a backplane breaks within one to two years and that, above all, the damping effect is too low that too many vertically impinging balls jump back into the field.
  • Object of the present invention is therefore to overcome the disadvantages of the prior art and a device for collecting tennis balls in such a way that with respect to the prior art even simpler means with the highest security and regularity of different directions incident tennis balls in the Collecting channel are led.
  • the invention is intended to help that the width in cross-sectional representation of the collection device can be kept as low as possible in order not to restrict the available playground and space on the tennis court too much.
  • the damping device consists of a rear boundary wall through which the tennis balls can not pass.
  • the rear boundary wall may consist of periodically mounted support beams between which, for example, a net-like boundary including a wire mesh is held or clamped.
  • a damping curtain is suspended completely freely suspended and unstressed.
  • the curtain can dodge when hitting a tennis ball with low moment of inertia and absorb almost all of the kinetic energy, so that only a minimal return pulse is introduced from the free-hanging curtain on the tennis ball.
  • the damping curtain depends essentially above the channel, so that from there the tennis balls drip down into the channel and collected there or can be fed to a central collection point.
  • the free-hanging damping curtain ends above the channel at a distance which corresponds at least to the diameter of the tennis balls.
  • the actual lowest point of the collecting trough can be behind the damping curtain.
  • the related curtain has, for example, a material density of about 50 g to 2 kg / m 2, preferably 100 or 150 g to 1.5 kg / m 2. Values around 400 g / m2 +/- 200 g have proven to be extremely favorable.
  • the materials can be made of plastic, for example with a reticulated structure.
  • the network can be formed with a small hole structure. In question are network structures that are formed with plastic sheathing possibly even made of elastic and softer material.
  • the optionally on the curtain optionally upwardly projecting balls again, if necessary, experience complementary small force component in the direction of the channel, so that the collection effect is improved even in extreme balls.
  • the collecting channel consists of a front and rear channel wall 3a and 3b.
  • the rear channel wall 3b is formed only with shallow depth, so that the lowest point at which the tennis balls are collected, just before the actual rear boundary wall 5 is located.
  • the collecting device is provided, for example, on the rear boundary side of a tennis court, wherein said collecting channel 3 extends, for example, from the left as well as the right side to the middle to a lowest point.
  • the tennis balls entering the collecting channel 3 can thus automatically converge, according to the gravitational forces, up to a central collection device (not shown in the figure), for example in the form of a collecting container.
  • the rear boundary wall 5 may consist of spaced at regular intervals vertical posts between which a network is braced or mounted. Since the network has smaller passage openings than the tennis ball diameter, this prevents balls from falling through the rear boundary wall 5.
  • a forward sloping roof 7 is provided, for example, in a falling angle to the vertical angle of 30 ° to 80 ° and in a length of 10 to 50 cm.
  • a damping curtain 9 is unstressed and mounted completely free-hanging.
  • the damping curtain 9 thus depends vertically due to its own weight and ends above the channel at a distance which corresponds at least to the diameter of a tennis ball.
  • the damping wall 9 is suspended above the front gutter wall, so that the lowest point of the collecting trough 3 between the damping wall and the rear boundary wall 5 is located.
  • This has the advantage that the impinging tennis balls, which fly through unchecked under the curtain, due to the reflection on the rear boundary wall deflected forward and meet the back of the free-hanging curtain, are slowed down there and drip down into the channel.
  • the damper wall 9 representing freely suspending curtain should hang over time something, so that the lower distance to the groove wall is equal to or smaller than the diameter of a ball, so the impinging on the front groove wall 3a balls to the deepest Roll point of the channel 3 by the lower boundary line or edge of the damping wall 9 is moved backwards.
  • Angle and dimensions can vary widely.
  • the distance from the highest point between the front gutter wall 3a and the rear end delimitation can be, for example, 40 to 80 cm, preferably 60 cm.
  • the pitch is preferably designed so that a ratio of 1: 2.5 between the height and the length of the rolling surface 1 is achieved.
  • the trajectory of the tennis ball B is shown that an example vigorously beaten tennis ball B first strikes the front ramp wall or rolling surface 1 and from there jumps relatively far upwards in the damping curtain 9.
  • the ball Since the ball has an increasing component and the damping in the horizontal direction through the damping curtain 9 is so strong, the ball is deflected practically only with a small recoil pulse upwards and can fall from there to the front channel wall 3b.
  • forward sloping pitched roof 7 is provided, via which the ball is additionally "captured” and deflected in the direction of the damping wall or on the front gutter wall.
  • the damping wall can consist of different materials. It is important that it is formed as "light and soft or elastic” as possible and thereby absorbs the kinetic energy as completely as possible and largely. On the other hand, the mass density and the weight must not be so great that the inertial effects predominate and the tennis ball so far jumps off as it does on a large inertial mass or wall with a strong return pulse that he does not hit the front channel wall 3a.
  • reticulated materials with a small network structure have proven to be favorable for the damping curtain, which may for example also consist of different materials coated with plastic.
  • the material density can certainly vary within wide ranges, for example, from 50 g to 3 kg / sq. Values around 400 gsm have proven to be extremely favorable.
  • the damping wall 9 could also be equipped so that it is designed in the manner of a curtain net with lower higher density (weighting belt) than in the upper area.
  • average material densities as stated above are desirable.
  • damping curtains can be purchased considerably more cost-effectively than specific damping materials which are adhesively bonded to solid support carriers.
  • the curtain is suspended unstrained and thus very yielding, the wear and tear is also drastically reduced compared to conventionally installed damping materials and layers.
  • the damping curtain termination limit is spared, for example in the form of a network, as the high energy incident tennis balls are intercepted by the front damping curtain and do not hit the rear boundary network.
  • the rear boundary wall which may consist of a network as mentioned, have a virtually unlimited lifetime. It must be remembered that otherwise the conventional networks in question, if they are used as a safety net for tennis balls, usually have to be replaced and replaced after one to two years.
  • the rear boundary wall is relatively difficult to access and here but now an impairment of the rear boundary network practically no longer takes place, the benefits achieved are even more obvious.
  • the rear boundary wall can be manufactured inexpensively with simpler means compared to the prior art, since a closed solid wall is not necessary. Another cost-effective improvement occurs by the mentioned high life of the rear boundary wall.
  • An end strip 11 shown in the drawing at the rear edge of the upper pitched roof 7 serves to ensure that no balls can fall from above between the collecting device and the actual tennis court boundary or adjacent wall of the house.
  • This tennis court boundary may consist in the open field from a tennis court surrounding a high fence or a hall wall, etc.
  • the upper end strip 11 also serves as a catching device and support, whereby the entire device is stabilized.
  • the retaining means for the rear boundary wall may also rise obliquely forward from the lower rear boundary line, so that, unlike the embodiment shown, the free hanging curtain 9 is suspended at the highest point of the rear boundary stand device, from which point extends forward to the inclined pitched roof 7, which can be extended to the rear around the sloping end strip 11.
  • the combination of the aforementioned pitched roof 7 with the above all free-hanging damping curtain has increased in previously unpredictable manner, the effectiveness of the collector over the prior art.
  • the freely suspended damper curtain can be easily hung and replaced on the stand or in the upper pitched roof.
  • the already mentioned distance between the rear boundary and the front damping curtain is chosen in practice so that even sharp shot balls can not penetrate to the rear boundary wall to preserve them completely and optimally.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Vibration Prevention Devices (AREA)
  • Road Paving Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Toys (AREA)
  • Pinball Game Machines (AREA)
EP87114669A 1987-10-08 1987-10-08 Dispositif de récupération des balles de tennis Expired - Lifetime EP0310694B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787114669T DE3773935D1 (de) 1987-10-08 1987-10-08 Vorrichtung zum sammeln von tennisbaellen.
AT87114669T ATE68363T1 (de) 1987-10-08 1987-10-08 Vorrichtung zum sammeln von tennisbaellen.
EP87114669A EP0310694B1 (fr) 1987-10-08 1987-10-08 Dispositif de récupération des balles de tennis
DE8812674U DE8812674U1 (fr) 1987-10-08 1988-10-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87114669A EP0310694B1 (fr) 1987-10-08 1987-10-08 Dispositif de récupération des balles de tennis

Publications (2)

Publication Number Publication Date
EP0310694A1 true EP0310694A1 (fr) 1989-04-12
EP0310694B1 EP0310694B1 (fr) 1991-10-16

Family

ID=8197342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114669A Expired - Lifetime EP0310694B1 (fr) 1987-10-08 1987-10-08 Dispositif de récupération des balles de tennis

Country Status (3)

Country Link
EP (1) EP0310694B1 (fr)
AT (1) ATE68363T1 (fr)
DE (2) DE3773935D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664171A1 (fr) * 1990-07-06 1992-01-10 Couderc Laurent Installation adjointe a un terrain de tennis permettant de recuperer globalement les balles a la fin de chaque echange.
DE19521507A1 (de) * 1995-06-13 1996-12-19 Weda Roland Werner Gmbh Rückrollsperre für Tennisbälle
US20220016510A1 (en) * 2020-03-10 2022-01-20 Jacob Stewart Court edge enhancement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153246A (en) * 1977-07-25 1979-05-08 Byrne Patrick J Sports net
NL8200793A (nl) * 1982-02-26 1983-09-16 Nutcracker Investment Company Inrichting voor het verzamelen van voorwerpen, zoals in het bijzonder tennisballen, en voor het verdere transport daarvan.
EP0122950A1 (fr) * 1983-04-22 1984-10-31 Sepp Baumgartner Dispositif pour récupérer des balles de tennis
FR2554727A1 (fr) * 1983-11-14 1985-05-17 Leneveu Michel Simulateur pour l'initiation et le perfectionnement aux principaux coups du tennis et de ses derives
US4575081A (en) * 1984-09-24 1986-03-11 Cavanagh Peter A Tennis ball retrieving system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153246A (en) * 1977-07-25 1979-05-08 Byrne Patrick J Sports net
NL8200793A (nl) * 1982-02-26 1983-09-16 Nutcracker Investment Company Inrichting voor het verzamelen van voorwerpen, zoals in het bijzonder tennisballen, en voor het verdere transport daarvan.
EP0122950A1 (fr) * 1983-04-22 1984-10-31 Sepp Baumgartner Dispositif pour récupérer des balles de tennis
FR2554727A1 (fr) * 1983-11-14 1985-05-17 Leneveu Michel Simulateur pour l'initiation et le perfectionnement aux principaux coups du tennis et de ses derives
US4575081A (en) * 1984-09-24 1986-03-11 Cavanagh Peter A Tennis ball retrieving system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664171A1 (fr) * 1990-07-06 1992-01-10 Couderc Laurent Installation adjointe a un terrain de tennis permettant de recuperer globalement les balles a la fin de chaque echange.
DE19521507A1 (de) * 1995-06-13 1996-12-19 Weda Roland Werner Gmbh Rückrollsperre für Tennisbälle
US20220016510A1 (en) * 2020-03-10 2022-01-20 Jacob Stewart Court edge enhancement

Also Published As

Publication number Publication date
ATE68363T1 (de) 1991-11-15
DE8812674U1 (fr) 1988-12-01
EP0310694B1 (fr) 1991-10-16
DE3773935D1 (de) 1991-11-21

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