A Tarpaulin Shelter with Collapsible Doorframes

Abstract

The present invention relates to a tarpaulin shelter with collapsible doorframes, it includes doorframes, the lower end of which is connected to the base and the upper end is connected with corner joint and cross beam, characterized in that the doorframe includes at least three upright poles, in which at least a set of x-scissor member are arranged between the middle upright pole and each side upright pole, said scissor is composed of two cross rods of which the middle portions are mutually hinged together. One end of each cross rod is hinged with the fixing collar of the corresponding upright pole; the other end is hinged with the movable collar corresponding to upright pole. Due to the fact that each cross rod can rotate around its middle portion and the corresponding movable collar and fixed collar, thereby when the upright pole is pulled through the rotation of the cross rod and the shifting movement of the movable collar on the upright pole, the distance between upright poles can be changed, thereby when package is made, the volume is smaller, and it is convenient in transportation and storage. When the use is needed, stretching and collapsing is convenient and rapid. To this end, the plug-in locating mode is used to achieve the purpose of rapid assembling. The present invention features simple structure, good practicality, therefore its use is worth to be widespread in the structure of tarpaulin shelters.

1 . A tarpaulin shelter with collapsible doorframes comprising doorframes; 
 a ground fastener connected to the lower ends of said doorframes to be a base of said tarpaulin shelter;    plurality of corner joints and lateral beams connected to the upper ends of said doorframes; wherein    said doorframe being composed of corner wall members;    each said corner wall member including at least three upright poles to form two perpendicular upright wall panels, one is middle pole, other two are side poles, between said middle upright pole and each said side upright pole having at least one x-scissor member;    said x-scissor member including a pair of crossed bars with a centrally positioned hinge point, one lower end of said crossed bar is hinged with a fixed collar surrounding said upright pole, and the other lower end of said crossed bar is hinged with another fixed collar surrounding the adjacent said middle pole, while one upper end of said cross bar is hinged with a movable collar surrounding said upright pole, another upper end of said crossed bar is hinged with a movable collar surrounding said middle pole.    
   
   
       2 . The tarpaulin shelter with collapsible doorframes of  claim 1 , wherein said ground fastener is formed by two perpendicular crossed bars, each of said crossed bar is further formed by a first base member and a second base member mutually connecting in a longitudinal plug-in manner, said ground fastener has three upright arranged positioning feet for positioning corresponding three said upright poles, i.e. one middle pole and other two side upright poles to form said corner wall member, said seconds base member comprises a horizontal inserted pipe and said positioning foot, said inserted pipe accommodates the horizontal pipe bar of said first base member in a plug-in connection manner, said locating foot is located on the distal end of upper surface of said inserted pipe and accommodated by the lower end port of said upright poles for forming a plug-in connection and correct positioning.  
   
   
       3 . The tarpaulin shelter with collapsible doorframes of  claim 2 , wherein a spring biased lock projector is disposed through/on the upper surface of said horizontal pipe bar of said first base member for locking the plug-in connection between said first base member and said second base member of said ground fastener.  
   
   
       4 . The tarpaulin shelter with collapsible doorframes of  claim 3 , wherein a spring-biased lock is located on the horizontal pipe foot of said first base member, while a lock hole for accommodating the spring-biased lock is disposed on the upper surface of said inserted pipe.  
   
   
       5 . The tarpaulin shelter with collapsible doorframes of  claim 4  wherein a hole is arranged through said inserted pipe for anchoring said ground-fastener and said tarpaulin shelter is fixed on the ground by punching nails into the ground.  
   
   
       6 . The tarpaulin shelter with collapsible doorframes of  claim 1 , wherein a fork fastener for fixing said cross beams is mounted on the upper end of said side upright pole.  
   
   
       7 . The tarpaulin shelter with collapsible doorframes of  claim 1 , wherein said corner joint is a four-directional corner joint disposed at the top end of said middle pole, which has three hollow tubes, one is for a inclined bar inserting in, the others are for accommodating two lateral bars,  
   
   
       8 . The tarpaulin shelter with collapsible doorframes of  claim 7 , wherein said inclined bars insert its upper ends into tubes of said central top joint, while insert its lower ends into the upward inclined tubes of said corner joint to form a roof.