EP0330838A1 - Gradin escamotable - Google Patents

Gradin escamotable Download PDF

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Publication number
EP0330838A1
EP0330838A1 EP89101316A EP89101316A EP0330838A1 EP 0330838 A1 EP0330838 A1 EP 0330838A1 EP 89101316 A EP89101316 A EP 89101316A EP 89101316 A EP89101316 A EP 89101316A EP 0330838 A1 EP0330838 A1 EP 0330838A1
Authority
EP
European Patent Office
Prior art keywords
seating
row
rows
bar
telescoping
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
EP89101316A
Other languages
German (de)
English (en)
Other versions
EP0330838B1 (fr
Inventor
Kenji Ando
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.)
Okamura Corp
Original Assignee
Okamura Corp
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 Okamura Corp filed Critical Okamura Corp
Publication of EP0330838A1 publication Critical patent/EP0330838A1/fr
Application granted granted Critical
Publication of EP0330838B1 publication Critical patent/EP0330838B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
    • E04H3/10—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons for meetings, entertainments, or sports
    • E04H3/12—Tribunes, grandstands or terraces for spectators
    • E04H3/123—Telescopic grandstands

Definitions

  • This invention relates to a telescoping seating system adapted to be used for example in a gymnasium, and more particularly to a locking mechanism of the telescoping seating system for extending or retracting en bloc a desired number of seating rows ranging from the lowest seating row to an intermediate seating row.
  • a telescoping seating system generally comprises a plurality of seating rows different in height from each other and is capable of assuming a use position in which the seating rows are in a stepped relation, and a storage position when not in use in which all of the seating rows are retracted and vertically aligned under the highest seating row.
  • the conventional locking mechanism comprises as shown in Japanese Utility Model Laid-Open Pub. No. 62-23950 a connecting bar horizontally suspended between a pair of intermediate seating row-supporting posts so that the back sides of each seating row ranging from the lowest seating row to the intermediate seating row contact the connecting bar, a base plate horizontally supported between the side bases of the lowest seating row, and a holding plate mounted on the base plate so as to be riser or laid down by means of a link.
  • the seating rows ranging from the lowest seating row to the intermediate seating row are locked as a unit.
  • This invention has been made in view of solving the above problems in the prior art to provide a locking mechanism for a telescoping seating system which is simple in structure, free from breakdown, mechanically strong enough to endure a large load which may be applied at the time of extension and retration of the seating rows, and superior in safety and durability.
  • this invention provides a telescoping seating system which comprises a plurality of seating rows different in height from each other and capable of assuming a use position in which the seating rows are in a stepped relation, and a storage position when not in use in which all of the seating rows are retracted and vertically aligned under the highest seating row; and a locking mechanism for linking en bloc a desired number of seating rows ranging from the lowest seating row to an intermediate row, and is characterized in that the locking mechanism comprises a bar horizontally supported between the rear portions of a pair of leg supports disposed below both sides of the intermediate seating row such that each rear side surface of leg support disposed below both sides of each seating row which is lower than the intermediate seating row comes to be contacted to the bar when the log supports are retracted, a base plate supported between the rear side portions of the lowest seating row, a plurality of actuating means mounted on the base plate, and a plurality of engaging members mounted on the base plate in association with the actuating means and capable of assuming
  • the engaging members drivably connected to the actuating means is moved to a locking position to engage with the bar, thereby linking as a unit a plurality of seating rows ranging from the lowest seating row to the intermediate seating row. Therefore, when the seating rows are extended in this state, the plurality of seating rows ranging from the lowest seating row to the intermediate seating row are extended in a locked state.
  • a telescoping seating system 1 comprises a plurality of seating rows 2, each having a different height from one another and linked together in such a manner that each of the seating rows 2 is capable of being moved back and forth.
  • all of the seating rows A-1 to A-n can be extended by pulling out the seating rows 2 in order of lower one beginning from the lowest seating row A-1 to form an ordinary stepped stand, and when not in use, all of the seating rows 2 can be vertically aligned and stored under the highest row (A-n) disposed at the room wall by retracting the seating rows 2 in order of lower one beginning from the lowest seating row A-1.
  • each seating row 2 When the seating rows 2 are in an extended state, the back portion of each seating row 2 is stably supported with support legs 7 of each corresponding height erected on the leg supports 3.
  • a bar 8 having a rectangular cross section is suspended at the rear portions thereof. Therefore, when each of the seating rows A-2 and A-1, which are disposed lower than the intermediate seating row A-3, is retracted and received within the intermediate seating row A-3, the rear sides of each leg support 2 are forced to contact the front side of the bar 8.
  • Base plates 9 are respectively supported as shown in Fig. 4 between each pair of the leg support 3 disposed at both sides of the lowest seating row A-1.
  • This locking mechanism S comprises an actuating means such as a motor 10, a decelerating equipment 11 integrally connected therewith, a pinion 12 drivably connected to the decelerating equipment and an engaging member such as a rack 13 engaging with the pinion 12 and having on the rear portion thereof a reversed U-like hook 13a.
  • the pinion 12 and rack 13 are disposed between a pair of guiding plates 14 mounted on the base plate 9 spaced apart from each other.
  • the pinion 12 is coaxially mounted on a shaft 15 horizontally passing through the pair of the guiding plates.
  • the pinion 12 can be rotated in a regular direction or in a direction reverse to the regular direction through coupling of the shaft 15 via a coupling member 17 to a driving shaft 16 protruded from the decelerating equipment 11.
  • the rack 13 slides up and down obliquely as shown in Fig. 5 by the engagement of a longitudinal grooves 18 obliquely formed on both sides of the rack 13 with an predetermind length of rids 19 formed on an inner side of the guiding plates.
  • the hook 13a automatically engages with the upper portion of the bar 8 as shown in a dotted line in Fig. 3.
  • this locking mechanism is conducted as follows. Before extending the seating rows 2 of the telescoping seating system, the motor 10 is regularly rotated to actuate the pinion 12 connected to both bar 15 and driving shaft 16 to rotate crockwise in Fig. 3 via the deceleration equipment 11 integrally connected with the motor 10. At the same time, the rack 13 which engages with the pinion 12 is moved downward from the upper limit position, as shown in a solid line in Fig. 3, to the lower limit position, as shown in a dotted line in Fig. 3.
  • the hook 13a formed at the rear portion of the rack 13 is also lowered to engage with the bar 8, thereby locking and linking en bloc a plurality of seating rows ranging from the lowest seating row A-1 to the intermediate seating row A-3.
  • the plurality of seating rows including from the lowest seating row A-1 to the intermediate seating row A-3 are moved in the locked state and extended as if they are a first seating row with the seating rows higher than the intermediate seating row forming an ordinary stepped stand (Fig.1 ).
  • the driving apparatus as described above is actuated in the reverse manner.
  • the plurality of the seating rows including from the lowest seating row A-1 to the intermediate seating row A-3 are also retracted as a whole as if they are one seating row, and vertically aligned under the highest seating row.
  • Fig. 6 shows another embodiment of this invention.
  • the pinion 12 and rack 13 engaging with the pinion 12 are utilized as a locking mechanism, and the locking and unlocking of the hook 13a integrally formed with the rack 13 to the bar 8 is conducted by the upward and downward sliding of the rack 13.
  • a hook member 20 having at the rear position a semi-circular engaging portion 20a facing downward is pivotally mounted between a pair of guiding plates 14 through a shaft 15, so that the engagement and disengagement of the hook member 20 can be conducted by rotating the shaft 15 together with the hook member 20 so as to allow the engaging portion 20a to be engaged with or disengaged from a horizontal bar 21 having a circular cross-section.
  • a very simple construction is adopted as a locking mechanism, i.e. a hook is mounted to be simply engaged with a horizontal bar 8 or 21, so that the occurance of breakdown would be effectively prevented.
  • any load which might be brought about during the movement of the plurality of seating rows en bloc is directly born by the base plate 9 through the guiding plate 14, and the strength of the locking mechanism is highly strengthened as compared with the conventional link structure so that it would be hardly broken down.
  • the bar 8 may be made adjustable lengthwise, so that the bar 8 can be detachably mounted on any pair of leg supports of every seating rows 2 thereby allowing any desired seating rows to be locked together with the lowest seating row by simply changing the fixing position of bar 8.
  • the locking mechanism as provided by this invention is simple in structure, easy to fabricate and adjust, and not prone to break down.
  • the strength of the engaging member is superior to that of the conventional one, so that even if any load which might be brought about during the movement of a plurality of the seating rows being locked together or during unexpected earthquake is given to the engaging member, the trembling or break-down of the locking mechanism would not be caused and would keep a very stable locking status, thus enhancing the safety thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP19890101316 1988-03-03 1989-01-26 Gradin escamotable Expired - Lifetime EP0330838B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2758788U JPH0427963Y2 (fr) 1988-03-03 1988-03-03
JP27587/88U 1988-03-03

Publications (2)

Publication Number Publication Date
EP0330838A1 true EP0330838A1 (fr) 1989-09-06
EP0330838B1 EP0330838B1 (fr) 1991-12-27

Family

ID=12225085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890101316 Expired - Lifetime EP0330838B1 (fr) 1988-03-03 1989-01-26 Gradin escamotable

Country Status (3)

Country Link
EP (1) EP0330838B1 (fr)
JP (1) JPH0427963Y2 (fr)
DE (1) DE68900590D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459964A (en) * 1993-02-17 1995-10-24 Ets. Doublet Stepped grandstands with telescopic elements
FR2746433A1 (fr) * 1996-03-20 1997-09-26 Husson Collectivites Sa Tribune telescopique munie d'un dispositif de blocage entre rangs
US6598351B2 (en) 2001-07-16 2003-07-29 Stageright Corporation Telescopic seating riser assembly
CN102003087A (zh) * 2010-12-07 2011-04-06 江苏金陵体育器材股份有限公司 多层活动看台伸出限位装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389511A (en) * 1966-03-08 1968-06-25 Brunswick Corp Telescoping gymnasium seating units
US3429081A (en) * 1964-08-20 1969-02-25 Automatic Sprinkler Corp Telescoping chair riser structure
DE3013530A1 (de) * 1979-04-12 1980-10-30 Nijha Nv Ausfahrbare tribuene

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429081A (en) * 1964-08-20 1969-02-25 Automatic Sprinkler Corp Telescoping chair riser structure
US3389511A (en) * 1966-03-08 1968-06-25 Brunswick Corp Telescoping gymnasium seating units
DE3013530A1 (de) * 1979-04-12 1980-10-30 Nijha Nv Ausfahrbare tribuene

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459964A (en) * 1993-02-17 1995-10-24 Ets. Doublet Stepped grandstands with telescopic elements
FR2746433A1 (fr) * 1996-03-20 1997-09-26 Husson Collectivites Sa Tribune telescopique munie d'un dispositif de blocage entre rangs
US6598351B2 (en) 2001-07-16 2003-07-29 Stageright Corporation Telescopic seating riser assembly
CN102003087A (zh) * 2010-12-07 2011-04-06 江苏金陵体育器材股份有限公司 多层活动看台伸出限位装置
CN102003087B (zh) * 2010-12-07 2013-01-30 江苏金陵体育器材股份有限公司 多层活动看台伸出限位装置

Also Published As

Publication number Publication date
JPH01131761U (fr) 1989-09-07
EP0330838B1 (fr) 1991-12-27
JPH0427963Y2 (fr) 1992-07-06
DE68900590D1 (de) 1992-02-06

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