EP0331553B1 - Apparatus for supporting floor board of extrensible stepped seat assembly - Google Patents

Apparatus for supporting floor board of extrensible stepped seat assembly Download PDF

Info

Publication number
EP0331553B1
EP0331553B1 EP19890400457 EP89400457A EP0331553B1 EP 0331553 B1 EP0331553 B1 EP 0331553B1 EP 19890400457 EP19890400457 EP 19890400457 EP 89400457 A EP89400457 A EP 89400457A EP 0331553 B1 EP0331553 B1 EP 0331553B1
Authority
EP
European Patent Office
Prior art keywords
seat unit
seat
underlying
elevating leg
floor board
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.)
Expired
Application number
EP19890400457
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0331553A1 (en
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 EP0331553A1 publication Critical patent/EP0331553A1/en
Application granted granted Critical
Publication of EP0331553B1 publication Critical patent/EP0331553B1/en
Expired 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

  • the present invention relates to an apparatus according to the preamble of claim 1.
  • Such apparatus disclosed for instance in DE-A-3 013 529, provides for securely supporting a front part of a floor stand of each seat unit on a floor stand of an underlying seat unit so as not to be cantilevered in an extensible stepped seat assembly (hereinafter referred to as a seat), and is constructed such that when in use, individual seat units can be stepwisely extended, while when out of use, underlying seat units can be stored in the uppermost seat unit.
  • a seat extensible stepped seat assembly
  • FIG. 4 schematically shows an example of a conventional seat of the above-mentioned type, in which (A), (B), (C), (D) and (E) are seat units, 1 is a truck, 2 is a strut, 3 is a floor board and 4 is a bench which is provided at the front end of the floor board.
  • the seat of this type is constructed such that when it is fully extended, the rear ends of the floor boards 3 of the second and other succeeding seat units (B), (C), (D) and (E) are supported on the left and right struts 2 or on a supporting member (not shown) adapted to link the struts together and the front ends thereof are supported on the struts 2 of the seat units (A), (B), (C) and (D) which are respectively positioned directly under the seat units concerned.
  • an object of the present invention is to solve the above-mentioned problems associated with the prior art.
  • the present invention has solved the above-mentioned problems with the provision of an apparatus in which there is elevatingly provided, in front of the lower surface of an overlying seat unit of a pair of seat units which are adjacent in vertical relation, an elevating leg which is designed so as to go down into abutment against the upper surface of an underlying seat unit to support the load of the front end of the overlying seat unit and there is also provided, in an appropriate position of the lower surface of the overlying seat unit, driving means adapted to lower the elevating leg in abutment against part of the underlying seat unit when the underlying seat unit is retracted and to raise the elevating leg when the underlying seat unit is stepped forward.
  • the essential front part of the lower surface of each seat which is stored is always put on and supported on the front part of the upper surface of a seat unit which is situated directly under the seat unit concerned automatically
  • a leading seat unit is securely supported on a seat unit directly under the leading seat unit and hence the leading seat unit never rocks even when the audience moves thereon.
  • Fig. 1 shows an essential part of a seat to which the present invention is applied, in which the essential part is shown in the same manner as what is shown in Fig. 4 and a strut 2 is omitted. It is to be noted that the like numerals are assigned to like parts shown in Fig. 4 and the description thereof is omitted.
  • a supporter 11 which is inverted-U-shaped in the configuration of the front surface is fixed to an essential front part of the lower surface of a floor board 3 of each of seat units except the lowermost one, such as the seat unit (D), so as to orient in a transverse direction.
  • Inclined holes 12 directing rearwardly and downwardly are pierced in both side strips 11a and 11a of the supporter 11.
  • a guide strip 13 which directs rearwardly and is bent downwardly at the rear end thereof is coupled to the rear end of the upper surface of the supporter 11 and a guide hole 14 is formed in the guide strip 13.
  • a square-boxed elevating leg 15 is fitted in the supporter 11.
  • An engagement pin 16 which is transversly provided through the elevating leg 15 is fitted in the inclined holes 12 at the both ends thereof and the lower end of the elevating leg 15 is normally projected downwardly from the supporter 11.
  • a coupler 17 which is of a rear-faced U configuration in the plane surface thereof is fixed to the rear surface of the elevating leg 15 and elongated holes 18 are symmetrically pierced in both-sided strips 17a thereof.
  • a driving shaft 20 which is oriented in a transverse direction is supported in the guide hole 14 in the guide strip 13 and on a support strip 19 which is hangingly provided on a rear part of the lower surface of the floor board 3 so as to be movable in the fore and aft directions.
  • a transversely oriented engagement pin 21 which is fixed to the front end of the driving shaft 20 is fitted into the elongated hole 18 in the coupler 17 and a driving plate 22 which is hangingly provided on the rear end thereof hangs down from the upper end of a supporting member 23 at the rear end of the floor board 3 of a seat unit, such as (C), which is situated directly under the seat unit concerned and is actuated in a forward direction by a compression spring 24 which is coiled up between the engagement pin 21 and the lower end of the guide strip 13.
  • the driving shaft 20 of the seat unit (D) is actuated by the spring 24 to the foremost position thereof, by which the elevating leg 15 which is situated in the upper foremost position thereof is put on the supporting member 21 of the seat unit (C) to avoid the swinging of the seat unit (D).
  • the driving shaft 20 and the compression spring 24 constitute driving means for raising and lowering the elevating legs 15 in accordance with the advancement and retraction of the underlying seat units (B), (C) and (D)
  • the driving means may be replaced by an arrangement in which a wire is used instead of the driving shaft 20 or by an arrangement in which a gear is rotated in accordance with the advancement or retraction of the underlying seat unit to raise or lower the elevating leg.
  • the front essential part of the lower surface of each seat unit which is stored is always put on and supported on the front part of the upper surface of the seat unit which is situated directly under the seat unit concerned automatically in accordance with the movement of the elevating leg.
  • the present invention can prevent the front part of the floor board of each of all the seat units which are stored from being cantilevered and hanged down.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP19890400457 1988-03-02 1989-02-17 Apparatus for supporting floor board of extrensible stepped seat assembly Expired EP0331553B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2692188U JPH0427962Y2 (enrdf_load_stackoverflow) 1988-03-02 1988-03-02
JP26921/88U 1988-03-02

Publications (2)

Publication Number Publication Date
EP0331553A1 EP0331553A1 (en) 1989-09-06
EP0331553B1 true EP0331553B1 (en) 1992-09-30

Family

ID=12206652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890400457 Expired EP0331553B1 (en) 1988-03-02 1989-02-17 Apparatus for supporting floor board of extrensible stepped seat assembly

Country Status (3)

Country Link
EP (1) EP0331553B1 (enrdf_load_stackoverflow)
JP (1) JPH0427962Y2 (enrdf_load_stackoverflow)
DE (1) DE68903013T2 (enrdf_load_stackoverflow)

Family Cites Families (2)

* 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
NL7902898A (nl) * 1979-04-12 1980-10-14 Nijha Nv Uitrijdbare tribune.

Also Published As

Publication number Publication date
DE68903013T2 (de) 1993-03-11
EP0331553A1 (en) 1989-09-06
JPH0427962Y2 (enrdf_load_stackoverflow) 1992-07-06
DE68903013D1 (de) 1992-11-05
JPH01131760U (enrdf_load_stackoverflow) 1989-09-07

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