Abstract:
A mechanism for cutting a reserve of thread of spindles of continuous spinning machines has a cutting blade, an element which is draggable and which is adjustable without contacting an area of a spindle where there exists a thread of a reserve to be cut and removed, and a device for regulating an adjustment of the element.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention relates to a mechanism for cutting a thread reserve of the spindles in a continuous spinning machine, which can secure a quick, effective and clean system for this operation.  
           [0002]    When the continuous spinning machines were developed, it was necessary to replace the tubes already filled with thread with new clean tubes in an operation called “doffing-and-replacing” which was carried out by hand. This operation was modernized to become automatic in that the thread begins to be wound on the tube without hand intervention. At the moment when the doffing-and-replacing ends, before withdrawing the tube filled with a thread, some turns of them are wound, approximately within three and seven, at the lower part of the spindle. These turns of the thread are called “reserve”, which thereafter shall be removed. Then the tube with the thread is replaced with a new empty tube, and a new cycle starts automatically. It is then necessary to cut the reserve and to clean the spindle so that no debris of thread remain which could hinder the following automatic replacement of the tube.  
           [0003]    For cutting of the reserve, several kinds of mechanisms have been developed. One of them is an individual mechanism for a spindle attached to a continuous machine, such as for example a thin film fixed in front of the spindle and driven by the traveling cleaning mechanism. The other mechanism is common to several spindles and is attached on the continuous machine, so that it travels through guideways located along the whole length of the continuous machine in front or on the rear of the spindles eliminating the reserve. These mechanisms can be driven by a device of the continuous machine or by an external element, such as for example a traveling cleaning device arranged over the continuous machine. All these mechanisms however are characterized by difficult regulation, high maintenance cost and low effectiveness, especially due to the difficult alignment of the guideways with respect to the spindles and their guide length which exceed 40 meters.  
         SUMMARY OF THE INVENTION  
         [0004]    Accordingly, it is an object of the present invention to provide a mechanism for cutting a thread reserve of spindles in continuous spinning machines, which avoids the disadvantages of the prior art.  
           [0005]    It is a further object of the present invention to provide a mechanism of the above mentioned general type, which cleans the reserves and secures that the spindle remains clean, in a simple and greatly efficient way.  
           [0006]    In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a mechanism for cutting a reserve of thread of spindles of continuous spinning machines, comprising a cutting blade; an element which is draggable and which is adjustable without contacting an area of a spindle where there exists a thread of a reserve to be cut and removed; and means for regulating an adjustment of said element.  
           [0007]    When the mechanism is designed in accordance with the present invention, it is formed as a single mechanism which is common to all spindles of one phase of the continuous machine, and for its displacement it is dragged by a second mechanism of the continuous machine or by an external element, such as a traveling cleaning mechanism as in the already existing systems.  
           [0008]    The present invention is not affected by either the amount of spindles to be simultaneously cleaned, or the amount of spindles for which a single displaceable mechanism is applied or the way of dragging.  
           [0009]    The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIG. 1 is a side view schematically showing an external dragging element and the area of contact of a guiding element with a lower cylindrical part with a spindle of the inventive mechanism;  
         [0011]    [0011]FIG. 2 is a view substantially corresponding to the view of FIG. 1 of the internal dragging element in the area of contact of the guiding element which prevents a direct contact with the lower cylindrical part of the spindle;  
         [0012]    [0012]FIG. 3 is a view showing the dragging element of the continuous machine at its rear part in accordance with the present invention;  
         [0013]    [0013]FIG. 4 is a view showing an enlarged detail of the dragging element of the continuous machine of FIG. 3;  
         [0014]    [0014]FIG. 5 is a schematic plan view of a roll spindle and a roller which is moving copying the spindle or a protecting guideway as well as the dragging element of the mechanism;  
         [0015]    [0015]FIGS. 6 and 7 show a further embodiment in a schematic side view of a triangle-shaped external dragging element in a schematic plan view in a row of spindles; and  
         [0016]    [0016]FIGS. 8 and 9 are views showing a further embodiment of the inventive mechanism for simultaneously cleaning several spindles.  
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0017]    A mechanism for cutting a thread reserve of spindles in a continuous spinning machine has a cylinder-shaped element  1  which is either composed of steel  9 , or coated with a slightly abrasive material, or is composed of metal with a final superficial treatment, or of some non-metallic material depending on its construction.  
         [0018]    Depending on the kind of thread  14  (cotton, etc.), the above mentioned element can adapt one or another shape and one or another superficial finish. It can freely rotate, or can be driven or fixed. This element is a part of the mechanism which is suitably adjusted without contacting the area  2  of the spindle  9 , where the thread  3  to be removed, called reserve, exists.  
         [0019]    The adjustment is regulated by a spring or an element for providing pressure  8 , a second element roller or guiding bearing  4  depending on the construction, the parts  5  for fastening them, and the support  16  attached to the frame  21  of the cleaning element which in turn is fixed on the dragging element  16  or  15 .  
         [0020]    A guiding part for such as a roller or a rotating bearing or a flat part, etc. is provided. In the event that the element  1  and the guiding element  4  are cylinder-shaped, both elements can have a common axis or not, according to the construction and the type of the continuous machine. The spindles  9  of the machine can be slightly out of alignment with each other. The guideways  10  and  10 ′ which support the clearing mechanism called also mouse, can be also out of alignment. Therefore the cutting elements for the reserve developed up to now can not secure a correct and suitable adjustment between the element  1  and each of the spindles  9 , remaining too seperated from some of the spindles which thus are not cleaned, or too close to other spindles so as to come in contact with the risk of damaging the mechanism or the spindle.  
         [0021]    The guiding element comes to directly and tangentially contact a copying part of the outline of the lower area  11  of the spindle  9  at its front or rear end. This part is generally cylindrical and forms a continuation with a similar cylindrical part  2  where the thread  3  to be cleaned is fixed. The spindle  9  or the guiding element  4  comes to contact with an equivalent element  12 , by means of which it can copy and know the accurate position of the spindle and which can be fixed for example in the spindlehead or bed, which has movement or not.  
         [0022]    The roller  4  then accurately copies the position of each spindle  9 , locating itself at the position which always secures the correct adjustment between the element  1  and the area  2  of the spindle  9  where the thread to be cleaned or the reserve  3  is located. Thus, for copying of each spindle, the roller  4  can contact the cylindrical lower part  11  of the spindle  9  itself, or an equivalent element  12  as shown in FIG. 2, which allows to carry out the same “position copying” functions. Applying the roller  4  in the lower part of the spindle or on the equivalent wrapping element  12  does not limit the object of the present invention.  
         [0023]    A spring or a similar pressing element  8  allows that the cleaning assembly and copier proper recovers the position. In addition, it allows the movement between the assembly support  16  and the frame  21 . The spring allows to accurately copy the position of each spindle  9 . Finally, a cutting element or blade is provided for the thread  3 .  
         [0024]    [0024]FIG. 5 schematically illustrates the way the spindles  9  or equivalent element  12  copies by means of the roller or guiding bearing  4 .  
         [0025]    The above disclosed mechanism allows to copy the spindle accurate position. In the event that the mechanism loses its vertical position shown in FIGS. 3 and 4, with the sham axis  19  it would not recover it. The vertical position can be lost, depending on the guiding system for the cleaning mechanism which can be installed in each kind of continuous machine, so that a mechanism for recovering the vertical position has been provided. This mechanism is optional and can be used or not.  
         [0026]    The mechanism for recovering the vertical position is located close arranged to the cleaning mechanism. To the already known cleaning mechanism, a rotating movement with respect to the location point  17  and the spring or pressing element  18  are added as shown in FIGS. 3 and 4. When the spring  18  applies pressure and the cleaning mechanism is not located in front of any spindle, the axis  20  which is common to the cleaning mechanism  1  and the guiding rollers  4  remains inclined with respect to the sham axis  19  as shown in more detail in FIG. 4. Then, when the roller or guiding bearing  4  contacts a spindle  9  or equivalent element  12  by the spring or pressing element  18  and the relation of movement between the different elements of the system, such as the actual axis  20  and the sham axis  19  coincides again, the mechanism remains fully parallel to the axis of the spindle as shown in FIG. 3.  
         [0027]    As explained herein above, the main feature of the present invention is that the mechanism for cutting and cleaning the reserve copies the accurate position of the spindle either by directly contacting the spindle or by contacting another part or element which has a concrete accurate position with respect to the spindle. The present invention is not limited to any of corresponding mechanisms, but instead deals with the idea of copying the position of the spindle by means of the mechanism or similar one. In connection with this, some modifications of the inventive mechanism within the spirit of the present invention are possible.  
         [0028]    A triangle-shaped mechanism can be utilized, with the sides which are slightly curved to take the exact shape of the spindle or the element used for being positioned with respect to the spindle, so as to carry the same function as the above mentioned element with the roller or guiding bearing  4 . Together with the triangle-shaped element, a second element for protrusion of the triangle will carry out the same functions as the above mentioned element  1 . The triangle-shaped element will rotate in that case on a point located over the part and at the same time it will move forward along the continuous machine for cleaning the reserve of the spindle, as shown in FIGS. 6 and 7.  
         [0029]    A mechanism for simultaneously cleaning several spindles can be provided in accordance with another embodiment. For each spindle to be simultaneously cleaned, an approximately half-arched-shaped part is made, which is formed of two parts. One part is used for cleaning the spindle and is equivalent to the element  1  and the other part is equivalent to the roller or guiding bearing  4  for copying the position of the spindle or the element which is equivalent to the element  12  to allow to position the mechanism with respect to the spindle taking the shape thereof.  
         [0030]    Each of the half-arched part are attached to a common frame, and then the whole assembly can be moved toward the spindle for copying the position of the spindle, by matching different moves pressing elements if required. Also, the spindle can be taken apart from the spindle by a small move of a few millimeters, for escaping from the spindle, which allows to move a step forward and to clean the following group of spindles. This embodiment is illustrated in FIGS. 8 and 9.  
         [0031]    It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.  
         [0032]    While the invention has been illustrated and described as embodied in a mechanism for cutting a thread reserve of spindles in continuous spinning machines, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.  
         [0033]    Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.