Linkage mechanism of paper-cut and anti-block of double-duty shredder

The present invention is a linkage mechanism of cut-paper and anti-block of double-duty shredders, main comprising: stripe-cutter wheel group, latitude cutter, drive shaft, paper-expeller, crank coupler link group and intermittent cluster gear, is that crank coupler link drive latitude-cutter to cut horizontally the paper to be cut, then intermittent cluster gear control the stripe-cutter wheel group to pull down the paper to be cut to act longitudinal cut, and by the circle cross movement, the paper to be cut will be cut into chips.

FILED OF THE INVENTION

The present invention relates to a double-duty shredder that can shift freely between different effects of stripe-cut and cross-cut, especially provides a linkage mechanism that can realize the effect of latitude cut and longitudinal cut and anti-block.

BACKGROUND OF THE INVENTION

Shredders can be classed into two types, the stripe-cut shredders and cross-cut shredders, according to the machine cut style, the former comprises a set of blades used for cutting on revolving cut wheel to cut paper into strips, the latter comprises blades being provided with more than one hook-shaped edges and the edges are disposed helically around the revolving cut wheel to cut paper into strip longitudinally and cut paper into shatter of 5 mm×40 mm in latitudinal direction. Because the cut effect of latter is better than the that of garbage or the effect of keep security of destroying the contents on the paper, the cross-cut shredders has become the main flow of the market. Just because the cross-cut shredders cut paper more tinny, so the motor that provides the drive revolving cut wheel must more powerful than that of stripe-cut shredders. Besides because the blade used for cutting of stripe-cut shredders is provided with more than one hook-shaped edges, to avoid accidentally injure operator on the circumstance of the current is not break, so ISO have a regulation that the shredders must have safe activation switch, namely, cross-cut shredders act only on the condition that be set on the fixed position of garbage container provided with manufacture, on the contrary, if the shredders being removed from the garbage container the current will be broken.

SUMMARY OF THE INVENTION

Whereas those mentioned above, the present invention contemplates combining a cross-cut shredder and stripe-cut shredder into a unit, and a strip cross double-duty. The present invention provides a linkage mechanism to make double-duty shredders realize the effect of latitude cut and longitudinal cut and anti-block of chips.

And, namely, the main object of the present invention is to provide a linkage mechanism of cut paper and anti-block of double-duty shredders to make latitudinal cut blade and longitudinal cut blade of double-duty fulfill the act of cut paper by the cross movement of crank coupler link device and intermittent cluster gear.

The second object of the present invention is to provide a linkage mechanism of cut paper and anti-block of double-duty shredders, to make the paper chips left in the groove of cutter be expel out by expeller to avoid paper block after latitudinal cutter blade cut the paper.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 1 and 2, a double-duty shredder is shown comprising a main body A, a motor drive mechanism B, a linkage mechanism of latitude cut/longitudinal cut and anti-block C, and a strip/cross switch mechanism D.

Referring toFIG. 3, the present invention comprises a linkage mechanism of paper-cut and anti-block of double-duty shredder, having a strip cutter wheel group1for longitudinal cut disposed between front paper-guide plate20and rear paper-guide plate21, wherein the end of axis101of drive cutter wheel10is fixed to driven gear wheel31of intermittent cluster gear3. A latitudinal paper cutter4is disposed on a first side of the rear paper-guide plate21, and provided with cutter41on the top and bottom of quadrate cutter setting40, and a cutter rest42is fixed respectively to the two ends of cutter setting40. A drive shaft5is disposed on a first side of the paper cutter4and is rotationally powered by the motor drive mechanism B.

A paper-expeller6is disposed on a second side of the paper-guide plate20, and is inverted U-shaped and, is provided with paper-expel plate60and two side support arms61, wherein, the end of support arm61includes a long-holed groove.

A crank coupler link group7, wherein one end701of crank70is secured to said drive shaft5, the other end702is secured to fixed end711of coupler link71, the free end712of coupler link71is set in the long-hole groove611of two supporting arms61of said paper-expeller6after engaged with cutter rest42of said latitudinal paper-cutter4.

A intermittent cluster gear3, wherein drive gear30consists of normal gear wheel301and abnormal gear wheel302, normal gear wheel301intermesh with motor drive gear wheel B to receive the rotate power and rotates driven gear wheel31intermeshed with normal gear wheel31and strip cutter wheel group1.

Referring toFIG. 4, the linkage mechanism of paper-cut and anti-block of double-duty shredder, as shown in view A, includes a coupler link70rotatable in a clockwise direction with the drive shaft5, a free end712of coupler link71and latitude paper-cutter4will be driven and move the long-holed groove611of the paper-expeller6, two-layer cutter41to paper to be cut through the pre-left cutter groove211of rear paper-guide plate21. The track length of circle movement of coupler link70is longer than the length of long-holed groove611, so that the free end712of coupler link71, as shown in view B, will compel paper-expeller6to move right in latitude direction, wherein the space left in the cutter groove201of front paper-guide plate20is disposed on the paper-expel plate60after paper-expel plate is moved to right.

When two-layer cutter41finished prink the paper to be cut, as shown in view C, will rotate roundly with coupler link70and be pull back to left side by coupler link71, and in the same way, when track length of circle rotate of coupler link70is longer than the length of long-hole groove611, paper-expeller6will be compelled move left to make paper-expel plate60will move the paper chips left in the cutter groove201of paper-guide plate20alone the direction of strip cutter wheel group1to garbage container, to avoid paper chip store up cutter groove201of paper-guide plate20cause block.

The strip cutter wheel group1is in a static state when the latitude cutter4engages with the paper to be cut, because the strip cutter wheel group1will pull the paper to be cut down, and the paper to be cut cannot remain in a static state in the course of latitudinal cut. This function of strip cutter wheel group1pulling the paper to be cut down will tear the paper to be cut. So the strip cutter wheel group1must be kept in static state in the course of latitudinal cutter4engaging with the paper to be cut.

Referring to the views A, B, C ofFIG. 4, the drive gear wheel30of intermittent cluster gear3consists of normal gear wheel301and abnormal gear wheel302, the normal gear wheel301intermeshes with motor drive to rotate the driven gear wheel31intermeshed with the strip cutter wheel group1. It can be seen form the drawings, the intermittent gear wheel3is a partial gear wheel of special design, wherein, approximately a quarter of the gear wheel302has the drive function, the other part does not have teeth and can not transfer power. The driven gear wheel31intermeshed with normal gear wheel301is provided symmetrically with parts having teeth and parts having no teeth, in other words, only when the parts having teeth of abnormal gear wheel302intermeshes with the parts having teeth of driven gear wheel31the driven gear wheel31will rotate strip cutter wheel group1, otherwise, the strip cutter wheel group will lose the source of power and keep static. The parts having teeth of abnormal gear wheel302do not intermesh with the parts having teeth of driven gear wheel31, they are in slipping state, so strip cutter wheel group1will be in a static state, the period of time that slipping movement needed will be provide to latitude cutter4to engage with the paper to be cut.

In view C, the cutter rotates with crank70and is pulled back to left by coupler link71after finished pricking the paper to be cut; and then, the parts having teeth of abnormal gear wheel302intermeshes with the parts having teeth of driven gear wheel31and rotate strip cutter gear wheel1to pull paper to be cut down and cut longitudinally these paper. So, paper to be cut have been pricked by cutter41before be pulled down and be cut longitudinally by strip cutter gear wheel1, so the effect of cutting paper will realize by the cross movement in circles of cutting the paper to be cut into paper chips.

We can conclude from the above mentioned, the present invention use the strip cutter gear wheel of stripe-cut shredder as longitudinal paper-cutter, the motor can be a smaller type than that of cross-cut shredder and will not confined by the ISO regulation that install compulsory active switch. Actually, the cross-cut shredder realize the effect of cut paper to be cut into chips by the latitude pricking of latitudinal cutter and he longitudinal cutting of said strip cutter wheel. The present is actually a new invention, and comply with the regulation for applying a patent.