The present invention relates to a doffing apparatus of a fabric take-up device, particularly to a doffing apparatus of a high-speed high-stand fabric take-up device, which can promote the safety of fabric-winding and fabric-doffing operations.
At present, the fabric completed by a knitting machine is wound up into a roll by a fabric take-up device. However, the roll of fabric wound up by a small-size fabric take-up device has a diameter of only about 20 inches, and owing to its small fabric-storage volume, it is gradually obsolete. In order to meet the demand for higher fabric-storage volume, the industry has developed a high-speed high-stand fabric take-up device; as the roll of fabric wound up thereby can reach a diameter up to about 46 inches, it has been widely applied in the industry.
A general high-speed high-stand fabric take-up device is usually formed of two side-frame casings sitting opposite to each other, a fabric-conveying apparatus, a fabric-winding apparatus used for taking up fabric, and a fabric-doffing apparatus used for unloading fabric. The fabric-conveying apparatus is primarily composed of several rollers, which are pivotedly installed above two side-frame casings and convey fabric to the fabric-winding apparatus. The fabric-winding apparatus is primarily composed of two drive wheels and a fabric-winding rod, wherein two drive wheels are separately installed on the middle portions of two side-frame casings, and one face of the drive wheel has a rabbet extending to the perimeter of the drive wheel. Each end of the fabric-winding rod protrudes a rod shaft. The fabric-winding rod is coupled to the drive wheels via engaging the rod shafts into the rabbets, and the drive wheels can drive the fabric-winding rod to rotate in order to undertake a fabric take-up operation. The fabric-doffing apparatus is primarily formed of a rod and two support brackets, wherein the rod is pivotedly installed between the portions near the bottoms of the side-frame casings; one end of each support bracket is coupled to the rod, and the other end of each support bracket is used to support the fabric-winding rod to span between two support brackets; via the rotation of the rod, the support brackets bring the fabric-winding rod to descend.
However, the conventional high-speed high-stand fabric take-up device has the following disadvantages:
The objective of the present invention is to provide a doffing apparatus of a fabric take-up device, wherein not only the safety of fabric-winding operation can be promoted via enhancing the connection between the drive wheels and the fabric-winding rods, but also the safety of fabric-doffing operation can be promoted via decelerating the rotation speed of the support brackets that sustain the fabric-winding rod.
To achieve the aforementioned objective, the doffing apparatus of a fabric take-up device of the present invention comprises: a couple of control handles, a couple of safety pins, a rod, a couple of support brackets, and a couple of hydraulic cylinders. The couple of control handles are separately installed on two side-frame casings sitting opposite to each other. Each control handle has a fixed end and a movable end. The fixed end is fixed to the interior of the side-frame casing, and the movable end projects through an opening of the side-frame casing to the exterior of the side-frame casing. Each safety pin penetrates the corresponding drive wheel. One end of the safety pin is fixed to the control handle, and the connection and disconnection between the other end of the safety pin and the rod shaft of the fabric-winding rod can be implemented via shifting the movable end of the control handle. The rod is pivotedly installed between two side-frame casings. One end of support bracket is fixed to the rod, and the other end of the support bracket has a longitudinal notch, which is used to support the fabric-winding rod to span between two support brackets. The couple of hydraulic cylinders are separately disposed in two side-frame casings. One end of the hydraulic cylinder is pivotedly installed to the side-frame casing, and the other end of the hydraulic cylinder has a cylinder shaft, which can move back and forth along the hydraulic cylinder, and the external end of the cylinder shaft is pivotedly installed to the support bracket. The hydraulic cylinders can provide a buffer force to decelerate the rotation of the support bracket.
The preferred embodiments and the technical contents of the present invention are to be described below in cooperation with the attached drawings.
Refer to
The doffing apparatus comprises: a couple of control handles 140, a couple of safety pins 150, a rod 160, a couple of support brackets 170, and a couple of hydraulic cylinders 180. The couple of control handles 140 are separately installed on two side-frame casings 110. Each control handle 140 has a fixed end 141 and a movable end 142. The fixed end 141 is fixed to the interior of the side-frame casing 110, and the movable end 142 projects through an opening 111 of the side-frame casing 110 to the exterior of the side-frame casing 110. Each safety pin 150 penetrates the corresponding drive wheel 130. One end of the safety pin 150 is fixed to the control handle 140, and the other end of the safety pin 150 is normally inserted through the hollow rod shaft 121 and coupled to the fabric-winding rod 120. The rod 160 is pivotedly installed between two side-frame casings 110 and near the bottom of two side-frame casings 110. Each support bracket 170 is installed between the fabric-winding rod 120 and the rod 160. One end of the support bracket 170 is fixed to the rod 160, and the other end of the support bracket 170 has a longitudinal notch 171, which is used to support the fabric-winding rod 120 to span between two support brackets 170. The couple of hydraulic cylinders 180 are separately disposed in two side-frame casings 110. One end of the hydraulic cylinder 180 is pivotedly installed to the side-frame casing 110, and the other end of the hydraulic cylinder 180 has a cylinder shaft 181, which can move back and forth along the hydraulic cylinder 180, and the external end of the cylinder shaft 181 is pivotedly installed to the support bracket 170. As the safety pin 150 is normally inserted through the hollow rod shaft 121 of the fabric-winding rod 120, the connection between the drive wheel 130 and the rod shaft 121 of the fabric-winding rod 120 is thus enhanced. In other words, in addition to the engagement between the drive wheel 130 the rod shaft 121 via the rabbet 131, the design of the safety pins 150 further promotes the safety of fabric-winding operation via preventing the fabric-winding rod 120 separating from the drive wheel 130.
Refer to
The fabric-doffing process is to be described below in detail. Refer to from
It is to be noted that when the support brackets 170 moves downward along the aforementioned arc path, the cylinder shafts 181 of the hydraulic cylinders 180 will gradually stretch out to buffer the descending speed of the support brackets 170 lest the fabric 10 together with the fabric-winding rod 120, whose weight is great, descend too fast and harm operators. Obviously, according to the spirit of the invention disclosed herein, the persons skilled in the art can modify the buffer force of the hydraulic cylinders 180 according to the weight of the fabric roll so that the descending speed of the support brackets 170 can be appropriately adjusted and the safety and convenience of fabric-doffing operation can be promoted.
In the current embodiment, as the descending speed of the support brackets 170 is buffered by the hydraulic cylinders 180, the fabric together with the fabric-winding rod 120 can be doffed by man and free from using a lifter. Thus, the special aisle for the lifter is no more needed in the factory, and the number of the fabric take-up devices 100 can be increased in order to promote productivity.
Refer to
Refer to
In summary, via the safety pins' enhancing the connection between the drive wheel and the rod shaft of the fabric-winding rod, the doffing apparatus of a high-speed high-stand fabric take-up device of the present invention can promote the safety of the fabric-doffing operation. Further, the connection and disconnection between the safety pins and the rod shafts of the fabric-winding rod is implemented just via shifting the control handle, so that the operation thereof is thus simple and quick. Furthermore, via the hydraulic cylinders' providing the buffer force to enable the support brackets to gradually rotate, the descending speed of the support brackets can be reduced, so that the safety of the fabric-doffing operation is promoted.
Those embodiments disclosed above are only to clarify the present invention but not to limit the scope of the present invention. Any equivalent modification and variation made by the persons skilled in the art is to be included within the scope of the present invention, and the scope of the present invention is to be dependent on the claims attached below.