Abstract:
An operating device in an application, in which movement in two different devices can be created using a single operating lever ( 9 ), the device being based on the rotation of sprockets. A sprocket ( 11 ) attached to the shaft ( 10 ) of the operating lever ( 9 ) is equipped on only part of its circumference with teeth that engage with the adjacent sprockets ( 13, 15 ). The operating device is mainly intended to move the press carrier and sidenipping device of a glue-binding device ( 1 ).

Description:
The present invention relates to an operating device and particularly to an operating device intended to create movement in two directions from two starting points, using one and the same handle or similar operating lever. 
     Numerous mechanical devices are known, in which there are at least two components, to which force must be applied, in order to move them. This publication discloses one such device, i.e. a glue-binding device, but it is in no way intended to be limited to a device like that described, but to clearly present the operating principle of the device. 
     In glue-binding, two separate levers are generally used to operate different functions. The most important of these functions are holding the paper bundle to be glue-bound securely in place while the spine of the bundle is being processed. In this case, processing refers to spreading the glue on the spine of the bundle and possibly also to roughening the spine prior to spreading the glue. This takes place suitably by using a press component, in which there are usually two plate-like parts, between which the bundle is pressed, especially in a manner that will keep the bundle under compression without the pressure having to be maintained by pushing the lever the whole time. 
     The second work stage, in which a lever is again required, is side nipping. This means that the cover sheet to be placed on top of the glue-bound bundle is given its final shape and attached to the sides of the bundle by a narrow band of glue next to the spine. This usually takes place by pushing a lever to move a suitable press beam or similar counter-piece from the side against the area next to the spine of the bundle being glue-bound. 
     BRIEF SUMMARY OF THE INVENTION 
     As stated, operation using two levers is, as such, possible, but the use of the present invention allows one of the levers to be eliminated, giving simpler and easier operation while also making the device simpler and cheaper to construct. 
     The aforementioned and other advantages and benefits of the invention are achieved by means of a device, the characteristic features of which are stated in the accompanying Claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the following, the invention is examined in greater detail, in connection with a glue-binding device, with reference to the accompanying drawings, which show the invention applied, to its operating environment. 
       Thus 
         FIG. 1  shows an axonometric view of the glue-binding device; 
         FIG. 2  shows an enlarged partial view of the end of the said device; 
         FIG. 3  shows in turn the said device, seen from directly in front; 
         FIG. 4  shows a cross-section A-A of  FIG. 3 ; and 
         FIG. 5  shows a closer view of the basic idea of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  thus shows a glue-binding device, which has the following principal components. The device  1  comprises a glue-spreading unit  2 , which can be moved backwards and forwards along a slide rail  4  in the frame and which is suitably supported in the spreading position. The movement can take place, for example, manually by using a knob  3 . The bundle  5  of paper or similar is pressed in a press unit, which can be rotated around its shaft and which is shown in  FIG. 1  in a position turned away from the original gluing position. The paper bundle  5  is held in place with the aid of a press beam  6 . In the position shown, the glued spine is downwards and the bundle is ready for side nipping. The cover sheet of the bundle  5  is marked with the reference number  7  and the beam performing the side nipping with the reference number  8 . It should be noted, however, that the invention is naturally not suitable for glue-binding, in which a cover  7  is not used at all. 
       FIG. 2  shows an enlarged view of part of  FIG. 1 . It shows the details of the operation of the device with the aid of a lever  9 . The shaft  10  of the lever  9  is pivoted in the frame structure and has a drive sprocket  11 —to be examined in detail later—attached to it. The mechanism moving the side-nipping beam  8  includes a sprocket segment  13 . The press carrier is rotated in turn using the lever  9  to drive the sprocket  15  set on the shaft  14 , which then drives the sprocket  17  set on the shaft  16 . The shaft  16  turns the carrier. 
       FIG. 3  shows a front view of the device. The cross-section A-A is marked on the figure and is shown in  FIGURE 4 . However, before describing  FIG. 4 , the principle of the invention is examined with the aid of  FIG. 5 . 
       FIG. 5  thus shows the mutual locations and operation of the operating lever and the sprockets in greater detail. The reference numbers refer to the same things as in  FIGS. 1 and 2 . The only new reference number is  18 . 
     Thus, as can be seen from  FIG. 5 , the drive sprocket  11  attached to the lever  9  and its shaft  10  does not have a complete set of teeth. The part of the sprocket  11  marked with the reference number  18  is without teeth. So what happens, when it is wished to rotate the press carrier around its shaft  16 ? In that case, the lever  9  is turned clockwise in  FIG. 5 . If the operator is assumed to be standing on the left-hand side of the device in  FIG. 5 , he simply pushes the lever  9  away from him. The teeth of the sprocket  11  then engage with the teeth of the sprocket  15 , causing the sprocket  15  to rotate and thus the sprocket  17  to rotate, according to known principles, so that the carrier, which is attached to the shaft  16  of the sprocket  17 , rotates with it. The sprocket  13 , on the other hand, does not begin to rotate, because the sprocket  11  lacks the teeth that would make it rotate. 
     The rotation takes place, as can be clearly seen from the direction of rotation of the sprockets, in such a way that, in the position shown in  FIG. 1 , in which the paper and cover sheet are loaded in place and pressed in place by the beam  6 , the bundle is rotated to allow its spine to be spread with the aid of the spreading devices  2 ,  3 ,  4 . After the glue has been spread, the lever is pulled back to its original position, i.e. the position of  FIG. 1 , in which side nipping is carried out. 
     When it is wished to carry out side nipping, the lever  9  is pulled towards the operator, in which case the sprocket  15  will not begin rotate, as the sprocket  11  lacks the necessary teeth  18 , but the sprocket segment  13  begins to rotate along with the sprocket  11  as their teeth engage and the side-nipping beam moves, due to the effect of the lever system  19  shown in  FIG. 4 , onto the area next to the spine of, and against the side of the paper bundle being glued, thus performing pressing and the final stage of the gluing. After a short period of pressure, the lever is returned to its original position, when the side-nipping beam  8  also returns to its original position. The return can also be carried out, or assisted by a return spring. After this, the glued product is removed by opening the press beam. After this, a new bundle for gluing can be loaded in place. 
     As has become clear form the above, the invention simplifies, and is also certain to reduce the cost of the structures and make the glue-binding device extremely handy to operate. The device is also operationally reliable. It is obvious that the sprockets must be positioned quite precisely in relation to each other, because at the start only the desired sprocket must begin to move: moving the lever in one direction starts the sprocket  15  and moving the lever in the other direction starts the sprocket  13 . This is, however, a basic adjustment, which is not changed later. 
     It is clear that, according to the direction or the angle of the rotation, one or more intermediate sprockets can be used, thus, as is known, causing a change in the direction of rotation of the following sprocket. Many other variations are possible, while remaining within the inventive idea and the scope of protection defined by the accompanying Claims. 
     For example, because, in the embodiment depicted above, only the part of the sprocket  11  with teeth is of importance, the sprocket can equally well be only a segment, in which case the sprocket will lack the entire segment corresponding to the part of the whole sprocket that has no teeth. Such alternatives are certainly also possible in which there are two sprockets, or two sprocket segments, or a sprocket and a segment, and would operate exactly like the single sprocket described above. In the case of two sprockets/segments, each tooth portion can be shorter than in the case of a single sprocket.