Patent Application
20120167707
1. Field of the Invention
The present invention relates to a hand puller to tie merchandise on a truck or other transposition, and more particularly to a pull handle structure of the hand puller.
A conventional hand puller is used to pull a rope tightly so as to tie merchandise on a truck securely, thus preventing the merchandise from falling during transportation.
The hand puller includes a base and a pulling handle, both of which are connected together by using two shafts; a pair of ratchets fixed on two ends of the shafts respectively to be rotated with the shafts; a retaining element to limit the ratchets to rotate in a single direction, such that the pulling handle is pulled upward and downward so that the shafts moves in the single direction to roll the rope tightly, thus binding the merchandise securely. Likewise, the retaining element is capable of being pulled so that the retaining element disengages from the ratchets, thus releasing the rope.
However, the pulling handle and the retaining element of the hand puller are lengthen to enhance pull force and a length of an arm of force, increasing a size of the hand puller and occupying a store space. In addition, the lengthen retaining element can not disengage from the ratchets smoothly.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
The primary object of the present invention is to provide a pull handle structure of a hand puller that is capable of roll a rope tightly by using an expendable and retractable pulling handle, and a movable bar is pulled to obtain a larger pulling force to tie merchandise easily.
Further object of the present invention is to provide a pull handle structure of a hand puller of which the movable bar is retracted to lower a size of the hand puller to save a store space.
Another object of the present invention is to provide a pull handle structure of a hand puller of which the movable bar is retracted when releasing the rope by ways of the pulling handle so that the retaining element disengages from the ratchet, hence the retaining element has not to be lengthen, operating the retaining element smoothly.
To obtain the above objectives, a pull handle structure of a hand puller provided by the present invention contains:
a base and an expendable and retractable pulling handle; the base including two opposite holes disposed on a middle section thereof to insert two shafts respectively, and each hole including a ratchet fitted on the two shafts, characterized in that:
the pulling handle includes a rotating member and a movable bar, and the rotating member is comprised of two side plates, each side plate includes a first end and a second end, the first end of the side plate includes an axial connecting portion on which a circular opening is formed so that the rotating member swings axially relative to the base, the side plate of the rotating member includes a sliding rail disposed on an outer surface thereof, made of a metal sheet, and twist formed, between the two side plates is defined a movable retaining element to contact with the teeth of the ratchet in a normal state, the movable bar includes two stems and a grip rod defined between the two stems, and the stem is fitted in the sliding rail of the side plate of the rotating member to move slidably, between the rotating member and the movable bar is defined a locking device to obtain a positioning purpose when the movable bar is expended and retracted.
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
With reference to
The limiting structure 21C and the locking device 21D between the between the rotating member 21 and the movable bar 22 include a first slot 216 disposed in the sliding rail 214 of the side plate 210 of the rotating member 21, a first bore 217 and a second bore 218 both of which are fixed on the second end 21B of the side plate 210 of the rotating member 21, each elongated stem 221 of the movable bar 22 includes a second slot 223 formed therein, and the second slot 223 includes a first boss 224 and a defining tab 225 arranged on one end thereof away from the grip rod 222 and includes a second boss 226 secured on another end thereof, between the two elongated stems 221 of the movable bar 22 adjacent to the grip rod 222 is defined a limit shaft 227, the defining tab 225 is limited in the first slot 216 to move, and the first boss 224 corresponds to the first bore 217, the second boss 226 corresponds to the second bore 218.
The limiting structure 21C includes the first slot 216 to match with the defining tab 225.
The locking device 21D includes the first boss 224 corresponding to the first bore 217 and the second boss 226 corresponding to the second bore 218.
In operation, the movable bar 22 is retracted so that the defining tab 225 is limited in the first slot 216 to move, and the second boss 226 retains in the second bore 218, such that the grip rod 222 of the movable bar 22 is held and pulls the retaining element 215 so that the retaining element 215 disengages from the ratchet 13, releasing a rope.
When rolling the rope to tie merchandise as shown in
As illustrated in
The pull handle structure of the hand puller of the present invention has the following advantages:
1. When the pulling handle 20 is used on the hand puller to roll the rope, the movable bar 22 is pulled to increase a length of an arm of force, achieving stronger tie force and force saving purpose. Besides, the movable bar 22 is retracted in the normal state to lower a size of the hand puller, thereby saving a store pace.
2. When the pulling handle 20 is served to release the rope, the movable bar 22 is retracted, and the grip rod 222 of the movable bar 22 is held to pull the retaining element 215 so that the retaining element 215 disengages from the ratchet 13, hence the retaining element 215 has not to be lengthen, operating the retaining element 215 smoothly.
While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
