Title: Shock control device for use in the construction of buildings such as bridges and the like

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Claims: What is claimed is:

1. A shock control device for use in the construction of buildings such as bridges and the like, comprising:

a casing fixedly mounted on a lower structure;

resisting plates received in said casing and having a number of movable and fixed plates alternately and in small interspace relation with each other;

said movable plates being linked to each other at least at the upper ends with uniform spaces from adjacent plates;

said fixed plates having the front and rear ends thereof abutted against the inner wall surfaces of said casing to block movement at least in the axial direction of said building;

a column member having the lower end thereof fixedly mounted on the upper ends of said movable plates and the upper end securely fixed to an upper structure of said building to be supported on said lower structure; and

a viscous material filling the interior of said casing including interspaces between said movable and fixed resisting plates;

said movable plates being movable toward said fixed plates upon application of impact on said upper structure against shearing resistance generated in the viscous material existing in the clearances of said movable and fixed plates.

2. A shock control device as defined in claim 1, wherein said fixed resisting plates are linked to each other at the lower ends thereof.

3. A shock control device as defined in claim 1, wherein said fixed resisting plates are placed in said casing alternately with said movable plates and separately from each other.

4. A shock control device as defined in claim 1, wherein said movable plates and fixed plates are respectively retained in uniformly spaced positions by means of spacers interposed between adjacent plates.

5. A shock control device as defined in claim 2, wherein said fixed resisting plates are linked to each other at the lower ends thereof by means of bolts and nuts.

Other info:

Inventors: Miyazaki, Shusuke (Tokyo, JA)
Maehara, Yasuo (Tokyo, JA)
Abe, Wataru (Hiratsuka, JA)
Shimoda, Ikuo (Fujisawa, JA)

Application Number: 618551
Filing Date: 1975-10-01
Publication_date: 1976-10-19
Assignee: Japanese National Railways (Tokyo, JA); Oiles Industry Co., Ltd. (Tokyo, JA); Yachiyo Engineering Co., Ltd. (Tokyo, JA)
Primary Class(es): 14/73.5 52/167.1, 52/167.6
Other Classes:
US Patent Ref:

2597800	May, 1952	Hussman	248/20.
3105252	Oct, 1963	Milk	52/167.
3218008	Nov, 1965	Harris	52/167.
3232015	Feb, 1966	Latham	52/167.
3233376	Feb, 1966	Naillon	52/167.
3459395	Aug, 1969	Scotto	248/20.
3587787	Jun, 1971	Rich	248/20.
3762114	Oct, 1973	Eskijian	52/167.

Other Refs: 57,8721,073,187

Sep, 1967	DL
Jan, 1960	DT

Primary Examiner: Byers, Jr., Nile C.
Assistant Examiner:
Attorney: Oujevolk; George B.