Scissor-type lifting platform

A scissor-type lifting platform comprising:

• stationary support rails on or in a floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• and
• at least one travel rail which includes contact areas and is supported on the top ends of the scissor arms;
• wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform, and wherein the longitudinally displaceable ends of the two scissor arms can be arrested with the associated travel rail at least in the lifted position.

A scissor-type lifting platform comprising:

• stationary support rails on or in the floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• at least one travel rail including contact areas and supported on the top ends of the scissor arms;
• wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform;
• and
• the longitudinally displaceable ends of the two scissor can be arrested with the associated travel rail at least in the lifted position;
• wherein an arresting mechanism is hinged on the top and/or bottom end of a scissor arm which includes a locking element which can be arrested on the travel rail or on the guide rail in form-locking and/or force-locking manner, and a catch element, wherein the catch element includes a plurality of substantially similarly formed catches, and the locking element can be engaged with at least one catch in detachable, form-locking and/or force-locking manner in a plurality of predetermined catching positions, wherein at least a first catching position, a second catching position and a third catching position can be approached by the locking element at least in a partial region of the catch element, wherein at least a first distance between the first catching position and the second catching position and a second distance between the second catching position and the third catching position have different lengths.

A scissor-type lifting platform comprising:

• stationary support rails on or in the floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• at least one travel rail including contact areas and supported on the top ends of the scissor arms;
• wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform;
• and
• the longitudinally displaceable ends of the two scissor arms can be arrested with the associated travel rail at least in the lifted position;
• wherein an arresting mechanism is hinged on the top and/or bottom end of a scissor arm which includes a locking element which can be arrested on the travel rail or on the guide rail in form-locking and/or force-locking manner, and a catch element, wherein the catch element includes a plurality of substantially similarly formed catches, and the locking element can be engaged with at least one catch in detachable, form-locking and/or force-locking manner in a plurality of predetermined catching positions, wherein at least a first catching position, a second catching position and a third catching position can be approached by the locking element at least in a partial region of the catch element, and
• wherein at least a first distance between the first catching position and the second catching position and a second distance between the second catching position and the third catching position have different lengths, the catch element includes a first partial region, in which the first distance between adjacent catches and the second distance between two adjacent catches are the same, and includes a second partial region, in which the first distance between two adjacent catches and the second distance between two adjacent catches are different, wherein the length values of the distances between each two adjacent catches in the longitudinal direction of the catch element increase or decrease.

A scissor-type lifting platform comprising:

• stationary support rails on or in the floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• at least one travel rail including contact areas and supported on the top ends of the scissor arms;
• wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform;
• and
• the longitudinally displaceable ends of the two scissor arms can be arrested with the associated travel rail at least in the lifted position;
• wherein an arresting mechanism is hinged on the top and/or bottom end of a scissor arm which includes a locking element which can be arrested on the travel rail or on the guide rail) in form-locking and/or force-locking manner, and a catch element, wherein the catch element includes a plurality of substantially similarly formed catches, and the locking element can be engaged with at least one catch in detachable, form-locking and/or force-locking manner in a plurality of predetermined catching positions, wherein at least a first catching position, a second catching position and a third catching position can be approached by the locking element at least in a partial region of the catch element, wherein at least a first distance between the first catching position and the second catching position and a second distance between the second catching position and the third catching position have different lengths, and
• wherein a guide unit is provided which is connected to the catch element such that the locking element can be engaged with the catch element exclusively in predetermined positions.

A scissor-type lifting platform comprising:

• stationary support rails on or in the floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• at least one travel rail including contact areas and supported on the top ends of the scissor arms, wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform, and wherein the longitudinally displaceable ends of the two scissor arms can be arrested with the associated travel rail at least in the lifted position;
• and
• a controller, by which the lifting assembly can be controlled during a lifting operation such that the travel rail reaches a first predetermined lifting height by a lifting movement, and after reaching this lifting height, it reaches a second predetermined lifting height by a lowering movement.

A scissor-type lifting platform comprising:

• stationary support rails on or in the floor level;
• at least two scissor arms which cross each other and are retained and guided with their bottom ends in the support rails;
• a hinge connecting the two scissor arms approximately centrally to each other;
• a lifting assembly engaging the scissor arms for spreading and contracting the scissor arms;
• and
• at least one travel rail including contact areas and supported on the top ends of the scissor arms;
• wherein one of the scissor arms is connected to a travel rail with its top end in hinged manner and the other scissor arm is guided on the travel rail with its top end in longitudinally displaceable manner upon the lifting and lowering movement of the scissor-type lifting platform, and
• wherein the longitudinally displaceable ends of the two scissor arms can be arrested with the associated travel rail at least in the lifted position;
• wherein an arresting mechanism is hinged on the top end of the one scissor arm which includes a slide element longitudinally guided on the profiled travel rail, and at least one locking element which can be arrested on the travel rail or the guide rail in form-locking or force-locking manner.