A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a simple volleyball referee chair. The simple volleyball referee chair comprises a support frame and a crawling ladder, wherein the upper side of the crawling ladder is articulated with the upper side of the support frame, the lower side of the crawling ladder is articulated with the articulated end of a first connecting rod, the driving end of the first connecting rod is articulated with the driving end of a second connecting rod, the articulated end of the second connecting rod is articulated with the lower side of the support frame, an overturning platform is arranged between the crawling ladder and the support frame, one end of the overturning platform is articulated with the support frame, the other end of the overturning platform is provided with a clamping groove, when the first connecting rod and the second connecting rod are pushed against each other, the clamping groove in the overturning platform overturned to be in a horizontal state is justly buckled onto a cross bar positioned at the topmost position of the crawling ladder, a roller is also arranged at the front side of the bottom end of the crawling ladder, the roller is not contacted with the ground when the volleyball referee chair is arranged horizontally, and the roller is supported on the ground when the volleyball referee chair inclines forwards. The simple volleyball referee chair has the advantages that the movement is convenient and storage does not need to occupy large space.
The invention discloses a simple volleyball referee chair. The simple volleyball referee chair comprises a support frame and a crawling ladder, wherein the upper side of the crawling ladder is articulated with the upper side of the support frame, the lower side of the crawling ladder is articulated with the articulated end of a first connecting rod, the driving end of the first connecting rod is articulated with the driving end of a second connecting rod, the articulated end of the second connecting rod is articulated with the lower side of the support frame, an overturning platform is arranged between the crawling ladder and the support frame, one end of the overturning platform is articulated with the support frame, the other end of the overturning platform is provided with a clamping groove, when the first connecting rod and the second connecting rod are pushed against each other, the clamping groove in the overturning platform overturned to be in a horizontal state is justly buckled onto a cross bar positioned at the topmost position of the crawling ladder, a roller is also arranged at the front side of the bottom end of the crawling ladder, the roller is not contacted with the ground when the volleyball referee chair is arranged horizontally, and the roller is supported on the ground when the volleyball referee chair inclines forwards. The simple volleyball referee chair has the advantages that the movement is convenient and storage does not need to occupy large space.
Simple volleyball referee chair
LI CHUNRONG (author)
2015-05-06
Patent
Electronic Resource
English
IPC:
E06C
LADDERS
,
Leitern
Online Contents | 2001
Magnetomechanical Interactions (Referee paper)
| British Library Online Contents | 1993