Access device for a working apparatus
The disclosure relates to an access device for a working apparatus, more particularly for a mobile crane, comprising a cheek, at least two steps which are laterally and vertically offset with respect to one another and are each supported on the cheek pivotably about a vertical first rotational axis, and a guide bar which connects the steps to one another. The guide bar is pivotably connected, at the end of the step opposite the cheek, to each step via a connection element such that the steps can be jointly moved about their first rotational axes from an access position, in which the steps project laterally from the cheek and in which the access device can be walked on, to a transport position, in which the steps rest against the cheek in a space-saving manner, and vice versa. The disclosure further relates to a working apparatus, more particularly a mobile crane.
1 . An access device for a working apparatus, the access device comprising:
a cheek;
at least two steps which are laterally and vertically offset with respect to one another and each supported on the cheek pivotably about a corresponding vertical first rotational axis; and
a guide bar which connects the at least two steps, wherein the guide bar is connected, at an end of each of the at least two steps that is opposite the cheek, to each of the at least two steps via a connection element pivotably such that each of the at least two steps can be jointly move about their corresponding first rotation axis from an access position, in which the at least two steps project laterally from the cheek and in which the access device can be walked on, to a transport position, in which the at least two steps rest against the cheek, and vice versa,
wherein in the access position, in the transport position and in every intermediate position, the longitudinal axes of the individual steps extend parallel to one another and/or the longitudinal axes of the cheek and the guide bar extend parallel to one another,
wherein the guide bar is connected to every step via the respective connection element pivotably about second and third rotational axes, which are not parallel to one another.
2 . The access device according to claim 1 , wherein the connection elements are fastened on the end faces of the steps rotatably about the second rotational axes and pivotably connected to the guide bar about the third rotational axis.
3 . The access device according to claim 2 , wherein the connection elements are configured as U-shaped and at least partially engage around the guide bar in the access position.
4 . The access device according to claim 1 , wherein laterally on the cheek each step is provided with at least one fastening element on the cheek.
5 . The access device according to claim 1 , further comprising a locking device, by means of which the access device can be locked in a releasable manner in the access position and/or in the transport position.
6 . The access device according to claim 1 , wherein at least three steps are provided.
7 . The access device according to claim 1 , further comprising a handgrip or handrail, wherein the handgrip or handrail is provided on the cheek or wherein the handgrip or handrail is provided on the carrier.
8 . The access device according to claim 1 , wherein the second rotational axis is perpendicular to the third rotational axis and/or perpendicular to the first rotational axis of the respective step.
9 . An access device for a working apparatus, the access device comprising:
a cheek;
at least two steps which are laterally and vertically offset with respect to one another and each supported on the cheek pivotably about a corresponding vertical first rotational axis; and
a guide bar which connects the at least two steps, wherein the guide bar is connected, at an end of each of the at least two steps that is opposite the cheek, to each of the at least two steps via a connection element pivotably such that each of the at least two steps can be jointly moved about a corresponding first rotational axis from an access position, in which the at least two steps project laterally from the cheek and in which the access device can be walked on, to a transport position, in which the at least two steps rest against the cheek, and vice versa,
wherein the steps are designed to be foldable and each comprise a pivoting part supported on the cheek pivotably about the first rotational axis and further comprise a folding part connected to the pivoting part pivotably about a fourth rotational axis,
wherein the pivoting parts and folding parts each have tread areas which in a folded-out first position form a common tread area and in a folded-in second position lie one on top of the other, wherein on the pivoting parts and folding parts, stops are provided which prevent the folding parts from being pivoted beyond the first position.
10 . The access device according to claim 9 , wherein a guide part is connected to the folding part of each of the at least two steps rotatably about a rotational axis parallel to the fourth rotational axis, so that the folding part of each of the at least two steps can be pivoted jointly about the respective fourth rotational axes.
11 . The access device according to claim 9 , wherein the fourth rotational axis extends parallel to the longitudinal axis of the step and/or perpendicular to the first rotational axis of the step.
12 . The access device according to claim 9 , wherein the connection elements are fastened on the end faces of the steps rotatably about second rotational axes and pivotably connected to the guide bar about third rotational axes.
13 . The access device according to claim 9 , wherein laterally on the cheek each step is provided with at least one fastening element on the cheek.
14 . The access device according to claim 9 , further comprising a locking device, by means of which the access device can be locked in a releasable manner in the access position and/or in the transport position.
15 . The access device according to claim 9 , wherein at least three steps are provided.
16 . The access device according to claim 9 , further comprising a handgrip or handrail, wherein the handgrip or handrail is provided on the cheek or wherein the handgrip or handrail is provided on the carrier.
17 . An access device for a working apparatus, the access device comprising:
a cheek;
at least two steps which are laterally and vertically offset with respect to one another and each supported on the cheek pivotably about a corresponding vertical first rotational axis;
a guide bar which connects the at least two steps, wherein the guide bar is connected, at an end of each of the at least two steps that is opposite the cheek, to each of the at least two steps via a connection element pivotably such that each of the at least two steps can be jointly moved about a corresponding first rotational axis from an access position, in which the at least two steps project laterally from the cheek and in which the access device can be walked on, to a transport position, in which the at least two steps rest against the cheek, and vice versa; and
a carrier, wherein the carrier is connected to the cheek or formed on the cheek, and wherein the carrier has a connection means by which the carrier can be or is connected to a structure, wherein the carrier comprises a first locking device, by means of which the carrier can be locked in a releasable manner in a fold-in position and in a fold-out position, relative thereto, the access device can be pivoted about a fifth rotational axis.
18 . A working apparatus having an access device according to claim 17 , wherein the access device is permanently fastened on the working apparatus.
19 . The working apparatus according to claim 18 , further comprising an undercarriage with two crawlers, and comprising an upper carriage supported on the undercarriage to slew about a vertical axis, wherein at least one of the crawlers has, on its outer side, an access device and wherein the access device, in the transport position, does not project beyond the outer contour of the crawler.
20 . The access device according to claim 17 , wherein at least one fastening element is arranged below the respective step and with which the steps are connected pivotably about the first rotational axes.