A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention provides a difficult-to-climb retractable door, which comprises a movable door body, a fixed door body, a plurality of partition frames and two expansion brackets, wherein the two expansion brackets are arranged between the movable door body and the fixed door body and are respectively located at the upper parts and the lower parts of the movable door body and the fixed door body; each expansion bracket comprises a plurality of first connecting rod groups, a plurality of second connecting rod groups and two third connecting rod groups; the number of the first connecting rod group is one greater than that of the partition frames; the first connecting rod groups are arranged in rows; any first connecting rod group comprises two first connecting rods; the number of the second connecting rod groups is the same as that of the partition frames; the second connecting rod groups are arranged in rows; any second connecting rod group comprises two second connecting rods; and each third connecting rod group comprises two third connecting rods. The difficult-to-climb retractable door is simple in structure, convenient to install and convenient to manufacture; and a person is effectively prevented from crossing.
The invention provides a difficult-to-climb retractable door, which comprises a movable door body, a fixed door body, a plurality of partition frames and two expansion brackets, wherein the two expansion brackets are arranged between the movable door body and the fixed door body and are respectively located at the upper parts and the lower parts of the movable door body and the fixed door body; each expansion bracket comprises a plurality of first connecting rod groups, a plurality of second connecting rod groups and two third connecting rod groups; the number of the first connecting rod group is one greater than that of the partition frames; the first connecting rod groups are arranged in rows; any first connecting rod group comprises two first connecting rods; the number of the second connecting rod groups is the same as that of the partition frames; the second connecting rod groups are arranged in rows; any second connecting rod group comprises two second connecting rods; and each third connecting rod group comprises two third connecting rods. The difficult-to-climb retractable door is simple in structure, convenient to install and convenient to manufacture; and a person is effectively prevented from crossing.
Difficult-to-climb retractable door
XU JUNKE (author)
2016-02-17
Patent
Electronic Resource
English
IPC:
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
,
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
/
F21V
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF
,
Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen
/
F21Y
Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend die Form oder die Art der Lichtquellen oder die Farbe des emittierten Lichts
,
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED