Corner canvas and corner awning device

Abstract

A corner canvas is formed such that when seen in a development, it has a right-angled trapezoidal form consisting of a rectangular canvas main body and a right-angled triangular canvas extension. A canvas take-up shaft is formed by an outer roller slidably and rotatably fitted on an inner shaft. When the canvas is to be developed, a folded swing arm is parallel-rotated obliquely forward and a front bar is pushed out to an obliquely forward corner space, thereby the corner space is covered. When the canvas is to be taken up, the swing arm is rotated obliquely rearward and the front bar is parallel-moved obliquely rearward, whereupon the outer roller is moved rearward while rotating to take up the corner canvas, and thereby the canvas extension is taken up by the exposed inner shaft. Thus, an epoch-making novel product is provided to the industry, which dramatically enhances ornamentality and external appearance in the corners of various buildings and which abounds in technical interests and utility as a corner awning device.

1 - 109 . (canceled) 
   
   
       110 . A corner canvas take up shaft to wind up or unwind a corner canvas, the corner canvas take up shaft comprising:
 an inner shaft; and   an outer roller axially movable on and supported with the inner shaft.   
   
   
       111 . A corner canvas take up shaft according to  claim 110 , wherein the corner canvas comprises:
 a rectangular canvas main body; and   a canvas extension extended from one side of the canvas main body.   
   
   
       112 . A corner canvas take up shaft according to  claim 111 , wherein the outer roller is slidably and rotatably fitted on the inner shaft;
 the outer roller winds the rectangular canvas main body thereon;   the inner shaft is exposed by a set back movement of the outer roller to a canvas extension; and   wherein the corner canvas take up shaft moves forward while rotating the outer roller to unwind the corner canvas when the corner canvas is to be unwound.   
   
   
       113 . A corner canvas take up shaft according to  claim 110 , wherein the inner shaft is either an inner rotation shaft or an inner fixed shaft and
 the outer roller is slidably and rotatably fitted on and supported by the inner rotation shaft or the inner fixed shaft.   
   
   
       114 . A corner canvas take up shaft for use with a corner canvas, the corner canvas take up shaft comprising:
 a casing for storing the corner canvas;   a canvas outlet formed open in a front surface of the casing;   end caps fitted to the casing;   an inner rotation shaft having guide grooves and guide projections, the inner rotation shaft being supported by bearings in the end caps;   an outer roller slidingly and rotatably fitted on and supported by the inner rotation shaft; and   guide projections and guide grooves formed on an internal perimeter surface of the end caps and slidably engaging the guide grooves and the guide projections of the inner rotation shaft.   
   
   
       115 . A corner canvas take up shaft for use with a corner canvas, the corner canvas take up shaft comprising
 a casing for storing the corner canvas;   a canvas outlet formed open in a front of the casing;   an end cap fitted to the casing;   an inner fixed shaft fixed to the end cap;   an outer roller slidably and rotatably fitted on and supported by the inner fixed shaft;   a spur gear fitted to a rear end of the outer roller;   a rod gear attached on an inner wall of the casing, the rod gear engaging the spur gear;   wherein an electric drive unit for a driving gear engaging the rod gear incorporated in a storing casing, or a manually operated or electrically operated drive unit forward/reverse rotating the rod gear.   
   
   
       116 . A corner canvas take up shaft for use with a corner canvas, the corner canvas take up shaft comprising:
 a casing for storing the corner canvas;   a canvas outlet formed open in a front of the casing;   an end cap fitted to the casing;   an inner fixed shaft fixed to the end cap;   an outer roller slidably and rotatably fitted on and supported by the inner fixed shaft;   a pipe shaft projected from an end cap fitted to a rear end of the outer roller; and   a whorl spring fitted onto the pipe shaft;   wherein an inner spring end of the whorl spring is locked to the pipe shaft; and   an outer spring end of the whorl spring is locked to a slide case fitted on the pipe shaft.   
   
   
       117 . A corner canvas take up shaft according to  claim 111 , further comprising means for preventing the canvas extension from adherently winding on the surface of the inner shaft exposed by the rearward movement of the outer roller. 
   
   
       118 . A corner canvas take up shaft according to  claim 117 , wherein a coil spring is wound around a fore end of the inner shaft;
 the coil spring is exposed as extending on an outer perimeter surface of the inner shaft with rearward movement of the outer roller; and   the canvas extension is wound on the outer perimeter surface of the inner shaft.   
   
   
       119 . A corner canvas take up shaft according to  claim 117 , wherein the inner shaft is inner rotation shaft; and
 a slide rope is provided in a tensioned condition along a guide groove formed along an axis of the inner rotation shaft;   and the outer perimeter surface of the inner rotation shaft is raised by the slide rope.   
   
   
       120 . A corner canvas take up shaft according to  claim 117 , wherein the inner shaft is an inner rotation shaft;
 a slide belt or an elastic belt is provided in a tensioned condition along a guide projection formed along the axis of the inner rotation shaft; and   the outer perimeter surface of the inner rotation shaft is raised by the slide belt or the elastic belt.   
   
   
       121 . A corner awning device for use on a building, the corner awning device comprising:
 a corner canvas; and   a canvas take up shaft structured to wind and unwind the corner canvas, the canvas take up shaft comprising:
 an inner shaft; and 
 an outer roller axially movable on and supported with the inner shaft; a front 
 bar supporting a bottom side of the corner canvas; and 
 swinging arms structured to push the front bar parallel obliquely forward or draw the front bar obliquely rearward to fold the front bar. 
   
   
   
       122 . A corner awning device according to  claim 121 , wherein when the corner canvas is wound to be stored, the front bar is transferred parallel obliquely rearward by rotating the swinging arms rearward, while the outer roller rotates to wind a canvas main body of the corner canvas and moves rearward with the sliding guidance of the inner shaft;
 a canvas extension of the corner canvas is wound on the inner shaft exposed by the rearward movement of the outer roller;   when the corner canvas is unwound to extend, the front bar is pushed parallel obliquely forward by rotating the swinging arms; and   the corner canvas wound on the canvas take up shaft is unwound while the outer roller is moved forward toward a fore end of the inner shaft, and thereby the canvas extension is extended over the corner space.   
   
   
       123 . A corner awning device according to  claim 121 , wherein the swinging arms comprise a pair of the swinging in parallel;
 a bottom end of one of the swinging arms is attached adjacent to a corner of the building while a fore end of the swinging arm is attached adjacent to an intermediate part of the front bar; and   a bottom end of an other swinging arm is attached to a position spaced apart from adjacent the corner while a fore end of the other swinging arm is attached adjacent to a rear end of the front bar.   
   
   
       124 . A corner awning device according to  claim 121 , wherein the swinging arms comprise a pair of the swinging in parallel;
 a slide rail is slidably fitted to and supported by the front bar;   a bottom end of one of the swinging arms is attached adjacent to a corner of the building while a fore end of the swinging arm is attached adjacent to a intermediate part or a fore end of the slide rail;   and a bottom end of an other swinging arm is attached to a position spaced apart from adjacent the corner while a fore end of the other swinging arm is attached adjacent to the rear end of the slide rail.   
   
   
       125 . A corner awning device according to  claim 121 , wherein the swinging arms are a pair of two-phase swinging arms rotating in parallel with two-phase action; the swing arms comprising a rear arm and a fore arm foldably connected with each other;
 an intermediate part of the swinging arms is connected with a connection rod;   a bottom end of the rear arm of one of the swing arms is attached adjacent to a corner of the building while a fore end of the fore arm is attached adjacent to an intermediate part of the front bar; and   a bottom end of the rear arm of an other of the swinging arms is attached to a place spaced apart from the corner position while a fore end of the fore arm is attached adjacent to a rear end of the front bar.   
   
   
       126 . A corner awning device according to  claim 121 , further comprising:
 a rectangular canvas; and   a second canvas take up shaft for the rectangular canvas;   wherein a fore end of the second canvas take up shaft is installed underneath or above a latter half of the corner canvas take up shaft in a overlapping manner.   
   
   
       127 . A corner awning device according to  claim 121 , further comprising:
 a second corner canvas;   a second canvas take up shaft structured to wind and unwind the second corner canvas, the second canvas take up shaft being similar in structure to the canvas take up shaft;   wherein the corner canvas and the corner canvas take up shaft are installed on one side of a corner of the building; and   the second corner canvas and the second canvas take up shaft are installed on an other side of the corner of the building.   
   
   
       128 . A corner awning device according to  claim 121 , further comprising:
 a second corner canvas;   a second canvas take up shaft structured to wind and unwind the second corner canvas, the second canvas take up shaft being similar in structure to the canvas take up shaft;   wherein the swing arms comprise telescopic swinging arms;   wherein the corner canvas and the corner canvas take up shaft are installed on one side of a corner of the building;   the second corner canvas and the second canvas take up shaft are installed on an other side of the corner of the building;   the corner canvas and the second corner canvas are tensionally supported by tension members;   the tension members comprise connection wires or connection belts formed in the shape of the letter X or V; and   fore ends of the front bars are fixed to be connected with each other.   
   
   
       129 . A corner awning device according to  claim 128 , wherein a position adjacent to a lower end of a canvas oblique side of each corner canvas is connected to each other with an elastic member structured to prevent a jutted out portion, beyond a line through one end of a canvas top side attached to outer roller and one end of canvas bottom side attached to the front bar, from hanging downwards. 
   
   
       130 . A corner awning device according to  claim 121 , further comprising:
 a second corner canvas;   a second canvas take up shaft structured to wind and unwind the second corner canvas, the second canvas take up shaft being similar in structure to the canvas take up shaft;   slide rails slidably fitted into and supported by the front bars;   wherein the corner canvas and the corner canvas take up shaft are installed on one side of a corner of the building; and   the second corner canvas and the second canvas take up shaft are installed on an other side of the corner of the building;   fore ends of the swinging arms are attached to an intermediate part or a fore end of the slide rail, and the rear end of the slide rail;   the corner canvas and the second corner canvas are attached between the respective outer rollers and front bars of each corner canvas take up shaft; and   the fore ends of the front bars are fixed to connect each other.   
   
   
       131 . A corner awning device according to  claim 121 , further comprising:
 a second corner canvas;   a second canvas take up shaft structured to wind and unwind the second corner canvas, the second canvas take up shaft being similar in structure to the canvas take up shaft;   wherein the swinging arms are bi-foldable swinging arms that bend and stretch;   the swinging arms are each formed with a rear arm and a front arm, both of which are bi-foldably connected with each other;   the swinging arms are connected with each other by a connection rod between bi-foldable joints thereof;   a bottom end of the rear arm of one of the swinging arm is attached adjacent to a corner of the building;   a fore end of the front arm of the one of the swinging arms is attached toward a fore end of the front bar;   a bottom end of the rear arm of an other of the swinging arms is attached at a position spaced apart from the corner;   a fore end of the front arm is attached toward an intermediate portion of the front bar;   the corner canvas and the corner canvas take up shaft are installed on one side of a corner of the building; and   the second corner canvas and the second canvas take up shaft are installed on an other side of the corner of the building;   the corner canvas and the second corner canvas are attached between the respective outer rollers and front bars of each corner canvas take up shaft; and   
     the fore ends of the front bars are fixed to be connected with each other.